JP5721224B2 - Radiation dose measurement system - Google Patents

Description

  The present invention relates to a radiation dose measurement system including a plurality of measurement units that measure a radiation dose and a network management unit that manages a communication network with the measurement unit.

  2. Description of the Related Art Conventionally, there is known a radiation monitoring system that monitors the amount of radiation, grasps the diffusion state of a radioactive substance, and predicts the diffusion state of the radioactive substance.

  Such a radiation monitoring system is a system for monitoring the radiation dose in places where radioactive materials may leak due to disasters or accidents and contaminate surrounding facilities, such as facilities handling radioactive materials, Multiple monitoring posts with radiation sensors, rain gauges, wind direction and anemometers are placed at a distance from each other, and based on the observation data sent from the monitoring posts in the monitoring unit connected to the multiple monitoring posts There is a system that obtains the intensity distribution of the radiation dose, grasps the current state, and predicts the future diffusion state of the radioactive substance (for example, Patent Document 1).

  Also, for example, in the surrounding area of various nuclear facilities such as nuclear power plants, there are many mobile slave stations that measure radiation dose, and slaves that are far away from the slave stations and transmitted wirelessly from the slave stations. An environmental radiation monitoring apparatus or the like that includes a master station that receives station position data and radiation dose data and performs data processing is disclosed (for example, Patent Document 2).

JP 2002-228754 A JP-A-8-334563

  However, in a radiation dose measurement system (a system that measures a radiation dose at a place where a plurality of radiation sensors are installed) that is used to measure a radiation dose in a conventional radiation monitoring system. When installing a measurement unit (for example, a monitoring post or a slave station) that measures radiation dose, it may be necessary to perform wiring work or special setting processing, and the work burden required to install the measurement unit becomes excessive. There was a problem that there was something.

  In addition, the conventional radiation dose measurement system has a problem that radiation dose may not be measured in an emergency such as when power supply from the outside is interrupted due to a disaster or accident.

  In order to solve the above problems, an object of the present invention is to provide a radiation dose measurement system in which a measurement unit can be easily installed and can be independently driven in an emergency.

  The radiation dose measurement system of the present invention is a radiation dose measurement system comprising a plurality of measurement units that measure a radiation dose, and a network management unit that manages a communication network with the measurement unit, the measurement unit comprising: A measurement unit that can be driven by a battery and measures the radiation dose according to measurement setting information indicating a measurement frequency of radiation dose and a transmission frequency of measurement data, and transmits measurement data measured by the measurement unit to the network management unit The network management unit includes: measurement data receiving means for receiving measurement data transmitted by the measurement data transmitting means of the measurement unit; and measurement data received by the measurement data receiving means. Radiation dose determining means for determining whether the radiation dose to be displayed is equal to or greater than a predetermined threshold; When the radiation dose is determined to be equal to or greater than a predetermined threshold by the dose determination means, the measurement setting information is updated for a measurement unit that measures measurement data indicating the radiation dose equal to or greater than the predetermined threshold according to a predetermined rule. Update information of the measurement setting information, transmission information that the measurement unit transmits to another measurement unit, and information that indicates processing content to be executed by the other measurement unit; Update request creating means for creating an update request including the transmission range of the transmission information, and update request sending means for sending the update request created by the update request creating means to the measurement unit, An update request receiving means for receiving an update request transmitted by the update request transmitting means of the network management unit; In response to reception of the update request by the receiving means, measurement setting information updating means for updating the measurement setting information in accordance with the update content included in the update request, and the update request is received by the update request receiving means. The transmission information transmitted by the transmission information included in the update request according to the transmission range included in the update request and the transmission information transmitted by the transmission information transmission unit of another measurement unit. Transmission information receiving means for executing the processing contents indicated by the transmission information received by the transmission information receiving means.

  With the above configuration, it is possible to provide a radiation dose measurement system that facilitates installation of a measurement unit and can be driven independently in an emergency.

  The update request creation means may be configured to create transmission information indicating processing contents for the other measurement unit to increase the measurement frequency.

  The plurality of measurement units are arranged in a site of a facility that handles radioactive substances such as a nuclear power plant and its surrounding area, and the network management unit includes a rule storage unit that stores the rule, and the rule storage unit includes Stores a rule indicating that the number of hops set in advance according to the radiation dose is set as the transmission range when the radiation dose determination unit determines that the radiation dose is equal to or greater than a predetermined threshold. And the said transmission information transmission means of the said measurement unit may be set as the structure which transmits the said transmission information by the broadcast communication which limited the number of hops according to the said transmission range.

  The network management unit includes measurement data storage means for storing measurement data measured by the measurement means of the measurement unit, and measurement data registration for registering measurement data received by the measurement data reception means in the measurement data storage means And a wireless communication means for providing the measurement data stored in the measurement data storage means by wireless communication to an information processing apparatus capable of displaying and analyzing the measurement data. .

  The radiation dose determination unit of the network management unit determines whether the radiation dose indicated by the measurement data measured by the measurement unit is equal to or less than a specific threshold, and the network management unit uses the radiation dose determination unit to determine the radiation dose. The comparison target specification that specifies the measurement data measured by the measurement unit having a predetermined relationship with the measurement unit that has measured the radiation dose by the measurement unit as the comparison target when it is determined that the value is equal to or less than a specific threshold value The radiation dose determining means determines whether the radiation dose indicated by the measurement data as the comparison target specified by the comparison target specifying means is less than or equal to the specific threshold, and the update request creating means is The radiation dose indicated by the measurement data as the comparison target is not more than the specific threshold value by the radiation dose judging means. If it is determined that may be configured to create the update request showing that lowering the measuring frequency of the radiation dose.

  ADVANTAGE OF THE INVENTION According to this invention, installation of a measurement unit is easy and it becomes possible to provide the radiation dose measuring system which can be driven independently in an emergency.

It is a block diagram which shows the example of a structure of a radiation monitoring system. It is a block diagram which shows the example of a structure of a measurement unit. It is a block diagram which shows the example of a structure of a network management unit. It is explanatory drawing which shows the example of a measurement data management table. It is explanatory drawing for demonstrating the example of arrangement | positioning of a some measurement unit. It is explanatory drawing for demonstrating the other example of arrangement | positioning of a some measurement unit. It is a flowchart which shows the example of a radiation dose measurement process.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing an example of the configuration of a radiation monitoring system 100 showing an embodiment of the present invention. As shown in FIG. 1, the radiation monitoring system 100 includes a radiation dose measurement system 50 (in this example, a network management unit 10, a plurality of measurement units 21 to 2N (N is an arbitrary positive integer), and a relay unit 40. A data communication server 60, and a wireless LAN communication information terminal 70. A plurality of network management units 10, relay units 40, data management servers 60, and wireless LAN communication information terminals 70 may be provided.

  In this example, the network management unit 10 and the wireless LAN communication information terminal 70 construct a wireless LAN. Further, the network management unit 10 and the data management server 60 are each connected to a communication network 80 such as the Internet.

  FIG. 2 is a block diagram illustrating an example of the configuration of each of the plurality of measurement units 21 to 2N in this example. Here, the measurement unit 21 will be described as an example. As shown in FIG. 2, the measurement unit 21 includes a radiation sensor S1, a triaxial acceleration sensor S2, a wind direction / anemometer M1, a rain gauge M2, a wireless communication terminal 31, a storage battery SB, and a solar battery power supply SBP. Including.

  The wireless communication terminal 31 is a network distributed cell computer (NICE) in an ad hoc wireless network, and has various signal input / output functions and a ZigBee wireless network linkage function. The wireless communication terminal (or ad hoc wireless communication terminal) 31 is a high performance, small size, low cost, low power consumption measurement control computer, and functions as a distributed node in an ad hoc wireless network. In this example, the wireless communication terminal 31 has a configuration for driving (operating) with a battery, such as an amplifier (AMP), a DC / DC converter (DC / DC), and a PMRLY (PhotoMOS relay). That is, the wireless communication terminal 31 includes various devices for executing power control of various sensors, transmission / reception of measurement signals, and the like, for example, with electric power supplied from the storage battery SB. In addition, since a general thing is used about an amplifier etc., detailed description here is abbreviate | omitted.

  The radiation sensor S1 is a low power type that can be driven by a small battery such as a dry cell, and for example, a small ionization chamber type radiation survey meter is suitable. In this example, it is assumed that the measurement unit 21 measures the radiation dose using the radiation sensor S1 every preset time.

  The triaxial acceleration sensor S2 is an earthquake detection sensor. Since various sensors and measuring instruments are known, detailed description thereof is omitted here.

  The wireless communication terminal 31 is preferably capable of long-distance communication and low power consumption. In this example, the case where ZigBee (registered trademark) communication is employed for communication performed by the wireless communication terminal 31 will be described as an example.

  In addition, the wireless communication terminal 31 functions as an independent measurement / control node by connecting a sensor or the like, but the equipment or the like can be brought online by being attached to an existing equipment or the like. The wireless communication terminal 31 of this example is designed to operate only with a few kilobytes of RAM built in the microcomputer, which is the main component, for the purpose of reducing component costs and power consumption. Depending on the application, a wired communication port such as RS232C, CAN, 1-Wire (registered trademark) may be provided, and if there is no problem of component cost and power consumption, an external storage device such as a microSD memory may be installed. It is good also as a specification to provide.

  As long as the storage battery SB has an amount of power that can drive the measurement unit 21, a battery that is as small as possible and that has a large amount of stored electricity is suitable. Specifically, a lithium ion storage battery, a nickel hydrogen storage battery, a nickel cadmium storage battery, or the like can be used as the storage battery SB. In addition, it is good also as a structure using primary batteries (dry battery) which cannot be recharged, such as an alkaline dry battery and an oxyride dry battery, instead of or together with the storage battery SB.

  The solar battery power source SBP is a known solar power generation device. It is also conceivable to use other natural energy power generation devices (for example, a wind power generation device, a vibration power generation device, etc.) as appropriate instead of or in combination with the solar battery power supply SBP. However, it is preferable that the power generation device assembled in the measurement unit 21 has a power generation capability that allows the measurement unit 21 to be driven without receiving an electric supply from an external power source. The solar power generation device is relatively inexpensive and has a power generation capability. Is preferable because of high.

  The plurality of measurement units 21 to 2N need not have the same configuration. For example, a communication relay function may be added to the measurement unit 21 so as to function as a “measurement / relay unit”.

  Further, in this example, the case where the measurement unit 21 includes the wind direction / anemometer M1, the rain gauge M2, and the triaxial acceleration sensor S2 will be described as an example. In addition, it is good also as a structure by which what is not provided with sensors other than various measuring instruments and radiation sensor S1 is included in several measurement units 21-2N.

  The wind direction / velocity type and rain gauge are preferably of a low power type. These sensors can be used to predict the diffusion range of radioactive materials by measuring the radiation direction and simultaneously measuring the wind direction, wind speed, and rainfall at the measurement location.

  The network management unit 10 is configured by an information processing apparatus such as a WWW server, and is managed by an administrator of the radiation monitoring system 100, for example.

  In this example, a radiation dose measurement system 50 based on an ad hoc wireless network (in this example, a ZigBee wireless network) is constructed by the network management unit 10, the plurality of measurement units 21 to 2N, and the relay unit 40. In addition, the format of the communication network in the radiation dose measurement system 50 is not particularly limited, and may be a general format such as a mesh format, a star format, or a tree format.

  FIG. 3 is a block diagram showing an example of the configuration of the network management unit 10 in this example. As shown in FIG. 3, the network management unit 10 includes a measurement unit network management server 10 </ b> A and a battery B.

  The measurement unit network management server 10A (hereinafter referred to as management server 10A) is an information processing apparatus that functions as a management node in an ad hoc wireless network. As shown in FIG. 3, the management server 10 </ b> A includes a data transmission / reception unit 11 that executes various communication processes, a data registration unit 12 that executes a process of registering data acquired in the communication process in a predetermined storage area, and the like. , A measurement data transmission instruction unit 13 that executes measurement data transmission instruction (or transmission request) processing for the plurality of measurement units 21 to 2N, a measurement setting information management unit 14, a radiation dose determination unit 15, A measurement setting information update unit 16, an update request creation unit 17, a measurement data DB 18, and a schedule DB 19 are included.

  Here, the measurement data transmission instructing unit 13 measures the measurement frequency (for example, measurement once every 10 minutes, measurement once every 60 seconds, etc.) and measurement for all or specific measurement units. A process for giving an instruction regarding the data transmission frequency is executed. Specifically, the measurement data transmission instruction unit 13 is a measurement setting that indicates the measurement frequency of the radiation dose or the transmission frequency of the measurement data, for example, according to an operation by the user of the network management unit 10 (or the administrator of the radiation monitoring system 100). Information is created, and the process of transmitting the created measurement setting information to each of the plurality of measurement units 21 to 2N is executed. In addition, the measurement data transmission instruction | indication part 13 preserve | saves the produced measurement setting information in schedule DB19 in the state matched with the identification information of each measurement unit.

  Here, the schedule DB 19 is a storage medium that stores schedule information indicating a schedule related to measurement of various data using the plurality of measurement units 21 to 2N, such as measurement setting information corresponding to each of the plurality of measurement units 21 to 2N. . The schedule DB 19 may store measurement setting information created in advance.

  Moreover, the measurement setting information management part 14 performs the process which manages the measurement setting information matched with each of the some measurement units 21-2N. In this example, the measurement setting information management unit 14 inputs / outputs the measurement setting information corresponding to each of the plurality of measurement units 21 to 2N among the schedule information stored in the schedule DB 19 and the input / output request according to the data input / output request. Various processes for centrally managing measurement setting information indicating a measurement method using a plurality of measurement units 21 to 2N such as processes in the schedule DB 19 are executed.

  Moreover, the radiation dose determination part 15 performs the process which determines whether the radiation dose which the measurement data received from each of the some measurement units 21-2N shows is more than a predetermined threshold value.

  In addition, the measurement setting information update unit 16 increases the measurement frequency of the radiation dose when the radiation dose determination unit 15 determines that the radiation dose is equal to or greater than a predetermined threshold (for example, the measurement interval is set to 0. 0 at the current time). The measurement setting information (that is, measurement setting information stored in the schedule DB 19) managed by the measurement setting information management unit 14 is updated (including addition and deletion of information). To do. In addition, as a method for updating the measurement setting information, for example, the measurement setting information update unit 16 selects 1 from a plurality of update contents set in advance based on the radiation dose indicated by the measurement data, the distance to other measurement units, and the like. It is good also as a structure which selects one update content and updates measurement setting information based on the selected update content. Further, the measurement setting information update unit 16 is based on, for example, measurement data (radiation dose, wind direction, air flow, etc.) stored in the measurement data DB 18, a residual power amount (or predicted remaining power amount) of each measurement unit, and the like. It is good also as a structure which determines the update content. It is assumed that the rules and various data used for updating the measurement setting information are stored in a storage device (for example, update reference information DB) provided in the network management unit 10 (or management server 10A).

  The update request creation unit 17 is an update request for measurement setting information to the measurement units 21 to 2N that measure measurement data indicating a radiation dose equal to or greater than a predetermined threshold according to a predetermined rule. Create an update request that includes the update content, the transmission information that the measurement unit sends to other measurement units and that indicates the processing content to be executed by the other measurement unit, and the transmission range of the transmission information Execute the process. In this example, the update request creation unit 17 measures the measurement unit that is the target of the update request with the content (for example, measurement frequency) indicated by the measurement setting information updated by the measurement setting information update unit 16 as the update content. Create information to make In addition, the update request creating unit 17 creates, as transmission information, information indicating the processing contents for other measurement units within the transmission range to increase the measurement frequency. The update request creation unit 17 also transmits information indicating the number of hops set in advance according to the radiation dose when the radiation dose judgment unit 15 determines that the radiation dose is equal to or greater than a predetermined threshold as a transmission range. create.

  The management server 10A includes a rule DB (not shown), which is a storage medium for storing rules for selecting an update target used for creating an update request (that is, information regarding the rules). In this example, the rule DB stores a rule indicating that the measurement setting information is updated so that the plurality of measurement units 21 to 2N increase the measurement frequency as the radiation dose indicated by the measurement data is higher. Suppose that The rule stored in the update request is not limited to this. For example, when the air volume in the observation area is large, the transmission range is widened (for example, the number of hops is normally set to “1” is “2”). Adjust the degree to increase the measurement frequency according to the wind direction in the observation area (for example, a position that can be predicted that the radiation dose is unlikely to rise as judged from the wind direction) The measurement unit may be a rule indicating that the measurement frequency is not changed. Further, when the network management unit 10 can grasp the arrangement of the plurality of measurement units 21 to 2N, for example, a rule indicating that the number of hops is selected according to the arrangement density of the measurement units may be stored.

  The measurement data DB 18 stores measurement data such as radiation dose received from each of the plurality of measurement units 21 to 2N.

  FIG. 4 is an explanatory diagram illustrating an example of a measurement data management table in the measurement data DB 18. As shown in FIG. 4, in the measurement data management table, for each of the plurality of measurement units 21 to 2N, the assigned measurement unit number, measurement time, measurement position, measured radiation dose, wind direction, wind speed, and rainfall Measurement data including quantity is stored.

  In addition, about the measurement position, when installing each of the plurality of measurement units 21 to 2N, for example, an installer of the plurality of measurement units 21 to 2N obtains GPS information of the installation locations and sets them in the memory of the measurement unit. Thus, it is assumed that position information is registered as measurement data.

  In addition, for example, each of the plurality of measurement units 21 to 2N specifies its own current position (for example, specifies coordinates indicating its current position using GPS), and includes the current position specified in the measurement data as a network. It may be configured to transmit to the management unit 10. However, when the GPS is connected to the measurement unit and the GPS information is automatically acquired, the power consumption of the GPS itself is large. Therefore, if the measurement point does not move frequently, setting of the current position by the installer or the like is required. The configuration is more practical.

  Each of the plurality of measurement units 21 to 2N acquires GPS information only when an acceleration greater than a specific magnitude is detected by the three-axis acceleration sensor, and transmits the acquired GPS information to the network management unit 10. Also good. That is, the acceleration sensor may be used as detection of movement of the measurement unit, and GPS information may be acquired and transmitted to the network management unit 10 when there is a possibility of movement. With such a configuration, it is possible to accurately grasp the current position of the measurement unit using the measurement data management table while suppressing power consumption of the measurement unit. In addition, when setting it as such a structure, the measurement units 21-2N determined whether the movement of the measurement units 21-2N was completed based on the data acquired by the acceleration sensor, and determined that the movement was completed. It is preferable that the GPS information is acquired at a time (for example, when the acceleration reaches a reference value) or after a predetermined time has elapsed after determining that the movement has been completed. This is to reduce power consumption by suppressing the number of times GPS information is acquired.

  The management server 10A manages the operation of all the wireless communication terminals 31 to 3N linked to the ZigBee wireless network, and also transmits data such as sensor information (measurement data in this example) from each of the plurality of wireless communication terminals 31 to 3N. .) Is collected and transmitted to the data management server 60 and the wireless LAN communication information terminal 70. Specifically, the data transmission / reception unit 11 of the management server 10A includes an ad hoc wireless communication function, a wireless LAN communication function, and a wide area wireless communication function.

  Here, the “ad hoc wireless communication function” is used for communication with each of the measurement units 21 to 2N. According to ad-hoc communication, bidirectional communication is automatically started between communication terminals existing within a communicable range (for example, within a communicable distance of several tens to several hundred meters). Conveniently, various types of wireless communication networks such as mesh type and star type can be easily formed without performing wiring between each measurement unit and special setting processing even when installing a wide range of . In this example, ZigBee communication is adopted in order to realize an ad hoc wireless communication function.

  The “wireless LAN communication function” is used for communication with the wireless LAN communication information terminal 70. According to wireless LAN communication, it is generally possible to transmit and receive a large amount of data in a shorter time than ad hoc wireless communication. In addition, if the communication format adopted by mobile terminals such as mobile phones (especially smartphones) and personal computers (personal computers) such as Wi-Fi (registered trademark) is used, When the monitoring system 100 is realized, it is not necessary to prepare a dedicated information terminal, which is convenient. In addition, regarding a common format, it is good also as a structure which employ | adopts the communication format widely employ | adopted as the communication device which can be used by connecting externally to a smart phone or a personal computer. In this example, since Wi-Fi communication is employed, the communicable distance between the communication terminals is generally several tens of meters.

  The “wide area wireless communication function” is used for communication with the data management server 60. According to wide area wireless communication using an Internet line or a satellite communication line, a large amount of data can be transmitted and received over a long distance in a short time. In this example, an Internet communication line via a mobile phone line is used.

  In addition, when using an external communication infrastructure such as a mobile phone line or an Internet line, when a large-scale disaster or accident occurs, the communication infrastructure breaks down and is disconnected, or a large number of users There is a problem that communication may be delayed due to concentration of access. Therefore, when introducing a radiation monitoring system, it is preferable to pay attention to the installation position and number of communication infrastructures.

  Further, since the management server 10A has few restrictions on cost and power consumption, it has a microcomputer that is much higher in performance than the microcomputer mounted on each of the plurality of wireless communication terminals 31 to 3N, and has several tens of megabytes. RAM and a multi-gigabyte storage device (eg SD memory) are installed. These storage media are used as the measurement data DB 18 or the like.

  Further, the management server 10A is equipped with a real-time clock (RTC) that serves as a reference for the entire ad hoc wireless network.

  It is preferable that the battery B included in the network management unit 10 has a larger amount of stored electricity than that added to each of the plurality of measurement units 21 to 2N (in this example, the storage battery SB). This is because the network management unit 10 generally has a larger amount of data communication and data processing than the measurement unit and consumes more power.

  The network management unit 10 may be configured to add a natural energy power generation device. As the natural energy power generation device, a solar power generation device, a wind power generation device, a vibration power generation device, or the like can be used as appropriate. However, power generation to such an extent that the network management unit 10 can be driven without receiving electric supply from an external power source. It is preferable to have the ability. Therefore, the solar power generation device is particularly preferable because it is relatively inexpensive and has high power generation capability.

  When the network management unit 10 includes the battery B and the natural energy power generation device, various data can be collected and transmitted over a long period of time without using an external power source.

  The relay unit 40 includes an ad hoc wireless communication terminal and a storage battery (not shown). In addition, it is good also as a structure which adds a natural energy power generation apparatus to the relay unit 40 similarly to the component of the other radiation dose measurement system 50. FIG.

  In this example, the relay unit 40 compensates for the shortage of the communication distance between each of the plurality of measurement units 21 to 2N and the network management unit 10, and also when the communication radio wave is difficult to reach due to the shield or the like. Used to secure a communication route by bypassing

  The data management server 60 obtains various measurement data through wide-area wireless communication with the network management unit 10, performs processing and analysis of the obtained measurement data, and executes processing to store in a storage area of a storage device provided therein. To do. In this example, the data management server 60 analyzes the measurement data stored in the measurement data DB 18 of the network management unit 10 through communication with the network management unit 10, for example, creates a radioactive substance diffusion prediction map, A process of storing information indicating the created radioactive substance diffusion prediction map as analysis result information in a predetermined storage area for a predetermined period is executed.

  The analysis of the measurement data by the data management server 60 may be executed by the data management server 60 independently according to the analysis program stored in the storage device of the data management server 60. For example, the administrator of the data management server 60 It is good also as a structure performed by these. Further, the data management server 60 may be capable of giving various instructions (for example, measurement data transmission instructions) to the network management unit 10 in accordance with an operation by an administrator of the data management server 60.

  The communication between the data management server 60 and the network management unit 10 can employ an Internet communication system or a satellite communication system via 3G or 4G wireless communication, which is a widely used communication infrastructure. Thereby, a large amount of information can be transmitted and received in a short time.

  The wireless LAN communication information terminal 70 is a device used for wireless LAN communication with the network management unit 10, accesses the measurement data DB 18 of the network management server 10A, and stores data such as radiation dose stored in the measurement data DB 18. (Measurement data) can be directly confirmed, and an instruction can be given to the network management unit 10.

  Therefore, even when wide-area wireless communication is not possible due to a large-scale disaster or accident, and data such as radiation dose cannot be obtained from the data management server 60, necessary measurement data is appropriately obtained from the network management unit 10. Since it can be obtained, it will be able to contribute to safety measures in the surrounding area. Further, if a communication format that is generally widespread, such as Wi-Fi communication, is adopted, a commercially available smartphone or personal computer can be used as an information terminal, which is convenient.

  In this example, the wireless LAN communication information terminal 70 executes processing for displaying the data stored in the measurement data DB 18 on the display screen of the display device provided therein. Further, the wireless LAN communication information terminal 70, when the analysis result information indicating the analysis result of the measurement data is created in the data management server 60, the network management unit 10 (the analysis result to the network management unit 10). When the information is stored, the analysis result information is acquired (from the network management unit 10), and the process of displaying the acquired analysis result information on the display screen of the display device provided therein is executed.

  In the radiation monitoring system 100, the wireless LAN communication terminal 70 can directly access the data management server 60 via the communication network 80 and acquire analysis result information indicating a radioactive substance diffusion map and the like. It is preferred that By providing a plurality of analysis result information acquisition paths, it becomes possible to improve the adaptability when a failure occurs in the communication environment.

  Next, the arrangement of the plurality of measurement units 21 to 2N will be described.

  FIG. 5 is an explanatory diagram for explaining an example of the arrangement of the plurality of measurement units 21 to 2N in the radiation dose measurement system 50. For example, when the radiation dose measurement system 50 includes ten measurement units 21 to 210, as shown in FIG. 5A, the measurement units 21 to 210 are approximately centered on the arrangement position of the network management unit 10. They are arranged in a star regular polygon shape (in this example, a star regular pentagon shape). Here, the “substantially center” may include a case where the arrangement position of the network management unit 10 is located inside a polygon inscribed in a substantially star-shaped regular polygon.

  A promising method for arranging multiple measurement (/ relay) units is to place a relay unit with relatively high power consumption in a place where solar energy and ad hoc wireless communication paths are easily secured, such as on the roof of a building. This is a form in which a measurement unit that operates in a low power consumption mode is disposed on the surrounding ground. That is, it is preferable that the installation location of the measurement / relay unit is a rooftop of a building that can secure the prospect of each other (that is, other measurement / relay units) and has little shade. For this reason, the positions where the measurement units 21 to 2N are arranged are not limited to star-shaped regular polygons. Depending on the environment in which the network management unit 10 is placed, for example, as shown in FIG. The units 21 to 27 may be arranged so as to be located on a line of one substantially star-shaped regular polygon whose center is the arrangement position of the network management unit 10.

  FIG. 6 is an explanatory diagram for explaining another example of the arrangement of the plurality of measurement units 21 to 2N. As shown in FIG. 6, a configuration in which a plurality of measurement units 21 to 2N are arranged in a mesh shape with the arrangement position of the network management unit 10 as a reference (for example, the arrangement position of the network management unit 10 is substantially centered). It is good.

  The arrangement of the measurement units 21 to 2N is not limited to a star arrangement (star arrangement) or a mesh arrangement, and is arranged at a position according to a predetermined standard based on the position where the network management unit is arranged. It only has to be.

  In addition, the measurement units 21 to 2N are randomly selected in a range where the measurement units 21 to 2N are not isolated (that is, in a range in which no other measurement unit is arranged within the communicable range of one measurement unit). They may be arranged (that is, sequentially arranged at a position suitable for measuring the radiation dose, for example, without following a predetermined arrangement rule). In this case, for example, the network management unit 10 specifies and specifies the reference shape according to the arrangement of the measurement units 21 to 2N constituting the radiation dose measurement system 50 based on the position information of the measurement units 21 to 2N. It is good also as a structure which can output a reference | standard shape (for example, substantially star-shaped regular polygon) as a reference reference at the time of increasing / decreasing the measurement units 21-2N later. The network management unit 10 may be configured to be able to calculate an evaluation value with respect to the arrangement status of the measurement units 21 to 2N arranged at random. In this case, for example, a higher evaluation value may be calculated as the measurement units 21 to 2N are arranged in a single star regular polygon.

  In the case where the plurality of measurement units 21 to 2N are arranged in a substantially star-shaped regular polygon, it is not necessary to limit the position of the intermediate unit 40 to the star-shaped regular polygonal line or the vicinity of the line.

  In addition, arrangement | positioning of the measurement units 21-2N mentioned above is an illustration, and, in actual operation, considering the topology on a map has little merit for labor. That is, in order to facilitate the construction of an alternative route when a measurement (/ relay) unit fails, a topology in which the distance between measurement (/ relay) units is as even as possible is advantageous. It is difficult to apply such a beautiful topology. In addition, there is a large gap between the distance on the map and the radio wave distance due to the topography and obstacles, which also makes it difficult to determine the location of the measurement (/ relay) unit by examining the topology on the map. . Considering this point, an excellent point of the ad hoc wireless technology is that the radio wave distance between nodes (that is, between a plurality of measurement units) is automatically measured, and an optimum communication route can be automatically determined.

  Next, the operation of the radiation monitoring system 100 of this example will be described.

  FIG. 7 is a flowchart illustrating an example of a radiation dose measurement process executed by the network management server 10 (more specifically, the management server 10A included in the network management unit 10) and the measurement units 21 to 2N in the radiation monitoring system 100. is there. In the radiation dose measurement processing, measurement of radiation dose in the measurement units 21 to 2N and processing according to the measurement result are executed. Note that the contents of processes not particularly related to the present invention may be omitted. Hereinafter, the measurement unit 21 will be described as an example.

  The radiation dose measurement process is started when the network management unit 10 (or the management server 10A) is turned on.

  In the radiation dose measurement process, the measurement data transmission instructing unit 13 of the network management unit 10 (more specifically, the management server 10A; the same applies hereinafter) is transmitted to the measurement unit 21 (in this example, the wireless of the measurement unit 21). Measurement setting information is transmitted to the communication terminal 31) (step S101). In this example, the measurement data transmission instructing unit 13 transmits measurement setting information stored in advance as measurement setting information corresponding to the measurement unit 21 to the schedule DB 19.

  When the measurement unit 21 receives the measurement setting information, the measurement unit 21 starts measuring the radiation dose according to the received measurement setting information (step S102). Note that the measurement unit 21 stores the received measurement setting information in a storage area of a predetermined storage device.

  When the measurement is started, the measurement unit 21 determines whether or not the measurement data transmission time indicated by the measurement setting information (for example, 5 minutes from the start of measurement or 5 minutes from the last transmission of measurement data) has elapsed. (Step S103). If it is determined that the measurement data transmission time has not elapsed (N in step S103), the measurement unit 21 proceeds to the process in step S102.

  On the other hand, if it is determined that the measurement data transmission time has elapsed (Y in step S103), the measurement unit 21 uses the wireless communication terminal 31 to transmit data (measurement data) measured by a radiation sensor, an anemometer, or the like to the network management unit 10. Transmit (step S104).

  When receiving the measurement data, the data registration unit 12 of the network management unit 10 registers the received measurement data in the measurement data DB 18 (step S105).

  When the measurement data is registered, the radiation dose determination unit 15 of the network management unit 10 determines whether or not the radiation dose indicated by the measurement data is greater than or equal to a predetermined threshold (step S106). Here, when it is determined that the radiation dose indicated by the measurement data is not equal to or greater than the predetermined threshold (N in Step S106), the network management unit 10 proceeds to the process in Step S105.

  On the other hand, if it is determined that the radiation dose indicated by the measurement data is equal to or greater than the predetermined threshold (Y in step S106), the update request creation unit 17 of the network management unit 10 sets the measurement setting information according to a predetermined rule. An update request including update contents, transmission information, and transmission range is created (step S107). In this example, the update request creation unit 17 updates the measurement setting information corresponding to the measurement unit 21 that acquired the measurement data for which the radiation dose is determined to be greater than or equal to the predetermined threshold, and the measurement of other measurement units. Transmission information indicating that the measurement frequency indicated by the setting information is updated to specific contents (for example, it is measured so as to be measured at intervals of 10 minutes in normal times, but updated so as to be measured at intervals of 60 seconds), and the number of hops A case where an update request including a transmission range (for example, information indicating that the measurement unit 21 performs broadcasting with the number of hops limited to 1) is created will be described.

  When the update request is created, the data transmission / reception unit 11 of the network management unit 10 transmits the created update request to the measurement unit 10 (step S108), and the process here ends. In this example, in response to the transmission of the update request, the network management unit 10 detects processing (for example, a radiation dose equal to or higher than a predetermined threshold) set in advance according to the radiation dose indicated by the measurement data. Warning information including position information indicating the location is generated and transmitted to a portable terminal possessed by the administrator of the radiation monitoring system 100).

  When receiving the update request, the measurement unit 21 updates the measurement setting information according to the received update request (step S109). In this example, the measurement unit 21 stores the received update request in a predetermined storage area. Note that the measurement unit 21 may be configured to overwrite the received update request with the already stored update request, or may be configured to leave the received update request in a state in which the time series can be identified.

  When the measurement setting information is updated, the measurement unit 21 confirms the transmission information and the transmission range included in the received update request, transmits the transmission information within the transmission range (step S110), and proceeds to the process of step S102. . In this example, the measuring unit 21 transmits transmission information by broadcast communication.

  In addition, the other measurement unit (for example, measurement unit 22) which received the transmission information transmitted by the measurement unit 21 updates measurement setting information according to the received transmission information.

  In order to prevent the measurement setting information from being frequently updated, for example, the measurement setting information update unit 16 of the network management unit 10 updates the measurement setting information for a certain period after the measurement setting information is updated. There may be no configuration.

  In this example, the measurement setting information is updated by receiving the update request transmitted by the network management unit 10 and the measurement unit 21 that has updated the measurement setting information by receiving the transmission information transmitted by the measurement unit 21. It is assumed that the other measurement units 22 that have updated the information transmit the updated measurement setting information to the network management unit 10, respectively. When the updated measurement setting information transmitted from the measurement units 21 and 22 is received, the network management unit 10 associates the received updated measurement setting information with the identification information of the measurement unit, and schedule DB 19 Save to.

  As described above, in the above-described embodiment, the radiation includes the plurality of measurement units 21 to 2N that measure the radiation dose and the network management unit 10 that manages the communication network between the measurement units 21 to 2N. In the dose measurement system 50, the measurement units 21 to 2N can be driven by a battery (for example, the storage battery SB), and measure the radiation dose according to the measurement setting information indicating the measurement frequency of the radiation dose and the transmission frequency of the measurement data. The measured data is transmitted to the network management unit 10, the network management unit 10 receives the measurement data transmitted by the measurement units 21 to 2N (for example, the measurement unit 21), and the radiation dose indicated by the received measurement data is predetermined. If the radiation dose is determined to be greater than or equal to a predetermined threshold, it is determined in advance. The measurement setting information update request to the measurement units 21 to 2N (for example, the measurement unit 21) that measures the measurement data indicating the radiation dose equal to or greater than the predetermined threshold according to the rule, Information that the units 21 to 2N (for example, the measurement unit 21) transmit to the other measurement units 21 to 2N (for example, the measurement units 22 to 2N), and the processing content that the other measurement units 21 to 2N execute ( For example, an update request that includes transmission information that is information indicating measurement setting information update processing) and a transmission range of the transmission information (for example, specification of the number of hops based on the measurement unit 21) is created, and the created update The request is transmitted to the measurement units 21 to 2N (for example, the measurement unit 21), and the measurement units 21 to 2N send the request to the network management unit 10. In response to receiving an update request transmitted, the measurement setting information is updated according to the update content included in the update request, and the transmission range included in the update request according to the received update request. Transmit transmission information included in the update request according to (for example, transmission range by broadcast communication in which the number of hops is limited to 1), and receive transmitted transmission information (a measurement unit different from the measurement unit that transmitted the transmission information) Since the processing content indicated by the received transmission information is executed (for example, the measurement setting information is updated), it is possible to provide a radiation dose measurement system that is easy to install a measurement unit and can be driven independently in an emergency. become able to.

  That is, for example, when installing a measurement unit equipped with a radiation sensor to monitor the amount of environmental radiation in the premises and surrounding areas of facilities that handle radioactive substances such as nuclear power plants, wiring work and special setting processing are performed. Since there is no need to perform this, the measurement unit can be easily installed.

  Moreover, a power failure occurred by using a battery-driven device for each unit (for example, the measurement units 21 to 2N and the relay unit 40) constituting the radiation dose measurement system that measures the radiation dose in the monitoring target range. In some cases, it is possible to realize a radiation dose measurement system that can be driven independently.

  Even if the external power supply is interrupted due to a disaster or accident and the external information infrastructure such as mobile / fixed telephone lines and Internet lines becomes unusable, data such as environmental radiation doses at multiple measurement points can be obtained. You can continue to pick them.

  In addition, the situation where the radioactive substance moves or diffuses from the installation location of the measurement unit that has detected a high radiation dose is normal (in this example, the state before increasing the measurement frequency, including the state where no measurement is performed). It will be possible to grasp in more detail than. Further, the measurement frequency can be increased when necessary, and wasteful power consumption in each measurement unit can be suppressed.

  In the above-described embodiment, the measurement units 21 to 2N notify the other measurement units after updating the measurement setting information used by the measurement units 21 to 2N when the radiation amount measured by the measurement units 21 to 2N is equal to or greater than a predetermined threshold. (For example, transmission information broadcasting with a limited number of hops) has been described as an example. However, the order of processing is not limited to this, and the measurement units 21 to 2N can update the measurement setting information of their own. A configuration (for example, step S110) for notification (that is, transmission of transmission information) to other measurement units may be executed (in combination with update processing).

  In the above-described embodiment, the case where the measurement data measured by the radiation dose measurement system 50 is provided to the wireless LAN communication information terminal 70 via the network management unit 10 has been described. It is good also as a structure which each measurement unit 21-2N to comprise can provide measurement data according to the communication request | requirement from information terminals (for example, general information terminals, such as a personal computer and a smart phone).

  In addition, when the measurement unit includes a storage battery (or a dry battery if necessary), various data can be collected and transmitted over a long period of time without using an external power source. .

  Although not particularly mentioned in the above-described embodiment, each unit constituting the radiation monitoring system 100 is not a battery at normal time (that is, when electricity is normally supplied). It is good also as a structure driven with the electric power supplied.

  Moreover, in one Embodiment mentioned above, the network management unit 10 measures other measurement units (For example, measurement units 22-2N other than the measurement unit 21 which acquired the measurement data which show the radiation dose more than a predetermined threshold value). Since it is configured to create transmission information indicating processing contents for increasing the frequency (for example, processing contents for updating the measurement setting information so that each of the measurement units 22 to 2N increases the measurement frequency), the network management unit is, for example, The measurement unit whose measurement frequency should be changed without performing the process for identifying the measurement unit whose measurement frequency is to be changed by arranging multiple measurement units (that is, omitting the process of searching for the measurement unit). It becomes possible to transmit the contents of instructions by specifying, and it can reduce power consumption To become.

  In the above-described embodiment, the plurality of measurement units 21 to 2N are arranged in the site of a facility that handles radioactive substances such as a nuclear power plant and the surrounding area, and the network management unit 10 creates an update request. A rule DB for storing rules used for the update request according to a rule indicating that the number of hops set in advance according to the radiation dose is set as the transmission range when the radiation dose is determined to be equal to or greater than a predetermined threshold The measurement units 21 to 2N (for example, the measurement unit 21 that has received the update request) are configured to transmit transmission information by broadcast communication in which the number of hops is limited according to the transmission range included in the received update request. Not only the point where a high radiation dose is detected, but also the surroundings are monitored automatically (i.e. Without the need for operation by the absence of an administrator) will be able to be enhanced.

  In the above-described embodiment, since the network management unit 10 is configured to communicate with an information processing apparatus (for example, the wireless LAN communication information terminal 70) via a wireless LAN, the information infrastructure does not function due to a disaster or the like. Measurement data can be provided even in situations.

  Further, in the above-described embodiment, the network management unit 10 is configured to perform communication with the information processing apparatus (for example, the wireless LAN communication information terminal 70) by ad hoc wireless communication, so that the information infrastructure does not function. Even in this case, the provision of measurement data can be continued effectively.

  In the above-described embodiment, the measurement units 21 to 2N transmit the measurement data measured according to the measurement setting information to the network management unit 10, and the network management unit 10 measures the measurements measured by the measurement units 21 to 2N. An information processing apparatus that includes a measurement data DB 18 for storing data, receives measurement data transmitted by the measurement units 21 to 2N, registers the received measurement data in the measurement data DB 18, and displays and analyzes the measurement data ( For example, the measurement data stored in the measurement data DB 18 is provided to the data management server 60 and the wireless LAN communication information terminal 70) by wireless communication (for example, the measurement data is transmitted). A radiation monitoring system that is easy to operate and can be driven independently in an emergency (for example, It is possible to provide a radiation monitoring system 100).

  Although not particularly mentioned in the above-described embodiment, the network management unit 10 determines whether the radiation dose indicated by the measured measurement data is equal to or lower than a specific threshold value, and the radiation dose is equal to or lower than the specific threshold value. In response to the determination that the measurement unit has become, a measurement unit (for example, the measurement unit 21) that measures a radiation dose below a specific threshold has a predetermined relationship with the measurement unit (for example, measurement setting information at substantially the same time as the measurement unit 21). The measurement data measured by the measurement unit 22) updated is specified as a comparison target, it is determined whether the radiation dose indicated by the specified measurement data as the comparison target is equal to or less than a specific threshold, and the measurement data as the comparison target is When it is determined that the indicated radiation dose is below a specific threshold, an update request indicating that the radiation dose measurement frequency is to be reduced is created. It may be. By adopting such a configuration, it is possible to reduce the measurement frequency and suppress the power consumption when it can be determined that the measurement unit needs to perform measurement with the measurement frequency increased from the normal time. become able to.

  Although not particularly mentioned in the above-described embodiment, the measurement units 21 to 2N automatically construct an ad hoc wireless network and perform address management on the network management unit 10 (or the management server 10B). The predetermined data to be used may be transmitted. By adopting such a configuration, address management regarding a network (for example, the radiation dose measurement system 50) constructed by the measurement units 21 to 2N can be performed. In this case, for example, the network management unit 10 is a group of logical addresses, network addresses, and MAC addresses respectively assigned to distributed nodes (for example, the measurement units 21 to 2N and the wireless communication terminals 31 to 3N) having the measurement units. Is provided with an address DB in which an address management table in which is registered is stored, and refers to the address management table when receiving data presenting an address including at least a network address among a group of addresses allocated to itself from a distributed node Then, confirm whether the presented address is normal and make an address transmission request to all the distributed nodes in response to determining that the presented address is not normal, and respond to the address transmission request. Add the address of each distributed node sent Registered in the scan management table may be configured to update its address management table. With such a configuration, it becomes possible to perform address management that can improve the processing efficiency at the application level.

  That is, in the conventional ad hoc wireless communication network, address management is performed using a network address automatically assigned to a distributed node, so that there is a problem that a processing load on an application level increases. On the other hand, in the second embodiment described above, when it is determined that the address presented from the distributed node is not normal, an address transmission request is made to all the distributed nodes, and an address transmission request is made. It is possible to automatically reconstruct an address management table that has lost its reliability because the address management table is updated by registering the address of each distributed node sent in response to Thus, since the distributed node can be specified at the application level by the logical address with high reliability, address management capable of improving the processing efficiency at the application level can be performed.

  Therefore, more effective address management can be performed when one of a plurality of measurement units that construct an ad hoc wireless network fails due to a disaster or the like and the configuration of the ad hoc wireless network changes.

  In addition, when multiple measurement units are newly installed around facilities that handle radioactive materials in response to the occurrence of a large-scale disaster, application-level processing efficiency required for address management of measurement unit groups that construct an ad hoc wireless network By improving the above, it is possible to reduce the burden required for installing the measurement unit.

  Although not particularly mentioned in the above-described embodiment, as a method for the network management unit 10 to acquire measurement data from the measurement units 21 to 2N (that is, radiation measurement devices), many radiation devices are mounted. A configuration may be adopted in which an analog voltage output proportional to a measured value is read. However, depending on the type of radiation measuring instrument, the voltage output range varies from 0 to 10 mV, 0 to 100 mV, and 0 to 2 V. Therefore, a variable gain amplifier that can be set to 1 time, 30 times, or 300 times is used. It is preferable to install and enable highly accurate reading regardless of the voltage output range. By adopting such a configuration, it is not necessary to unify the types of radiation devices that constitute the measurement units 21 to 2N, so that restrictions on the installation of the measurement units can be relaxed.

  Although not particularly mentioned in the above-described embodiment, depending on the model of the radiation measuring instrument constituting the measurement units 21 to 2N, there is one in which the voltage output is proportional to the logarithm of the measurement value. Therefore, it is good also as a structure which the measurement units 21-2N perform an exponential calculation, and convert a voltage value into a measured value.

  Although not specifically mentioned in the embodiment described above, in order to reduce the power consumption of the radiation measuring instrument, an electronic switch (photo moss relay) is inserted in the connection cable between the built-in battery and the main body, and the measuring units 21 to 21 are connected. It is good also as a structure which can perform ON / OFF control from 2N. By adopting such a configuration, since the built-in battery is used, adjustment on the measurement unit side or the like becomes unnecessary even if the voltage of the battery changes depending on the model. Further, since it takes 30 to 60 seconds until the measured value is stabilized after the power is turned on, it is preferable that the measurement output voltage is read after that.

  Although not particularly mentioned in the above-described embodiment, depending on the type of radiation measuring instrument, external power supply by an AC adapter or the like may be required, so that the measurement units 21 to 2N are of variable voltage type. It is good also as a structure which mounts a DC-DC converter and enables the electric power feeding to the radiation measuring device from the power supply (for example, a solar cell and a Li-ion battery) of the measurement units 21-2N.

  Although not particularly mentioned in the above-described embodiment, the measurement of the wind direction by the measurement units 21 to 2N classifies the measurement values per second into 16 directions and records them as appearance frequencies in the past 10 minutes (variable). It is good also as a structure which employ | adopts a system.

  Although not specifically mentioned in the above-described embodiment, the measurement units 21 to 2N are each equipped with an information storage medium such as a microSD memory, and even when wireless communication is defective, measurement data is missing. It is good also as a structure which does not.

  In the above-described embodiment, the case where the network management unit 10 executes the radiation dose determination and the like has been described. However, the radiation dose determination process (for example, step S106) performed by the network management unit 10 and the update target are described. It is good also as a structure which each of the some measurement units 21-2N performs this selection process (for example, step S107). However, since priority should be given to the reduction of power consumption in the configuration of the measurement unit, it is preferable to provide the measurement unit with limited capability, and it is not recommended to include complex logic. In addition, when the determination logic is distributed to a plurality of distributed measurement units, it is difficult to update the determination logic. Further, if the determination function is provided on the measurement unit side, a large amount of communication with the network management unit occurs, resulting in a problem of increased power consumption. In the above-described embodiment, since the network management unit 10 is configured to make an update request creation determination by a simple method using a threshold value, it is possible to avoid mounting a complicated determination function in the network management unit 10. Power consumption can be suppressed.

  In the above-described embodiment, the network management unit 10 (or the management server 10A) and the measurement units 21 to 2N each have a control program (a network management program or a measurement program) stored in its own storage medium. The various processes described above are executed according to the above.

  Further, in the above-described embodiment, the radiation dose measurement system 50 including the plurality of measurement units 21 to 2N that measure the radiation dose is incorporated and operated in the radiation monitoring system 100 that collects and manages the measurement data. Although the case has been described as an example, the embodiment of the present invention is not limited to this, and the radiation measurement system according to the present invention can be incorporated in any system as long as it uses radiation dose measurement data. Can do.

  INDUSTRIAL APPLICABILITY According to the present invention, it is useful to provide a radiation dose measurement system that is easy to install a measurement unit and can be driven independently in an emergency.

B battery SB storage battery SBP solar battery power supply 10 network management unit 10A measurement unit network management server (management server)
DESCRIPTION OF SYMBOLS 11 Data transmission / reception part 12 Data registration part 13 Measurement data transmission instruction | indication part 14 Measurement setting information management part 15 Radiation dose determination part 16 Measurement setting information update part 17 Update object selection part 18 Measurement data DB
19 Schedule DB
21 to 2N measurement unit 31 to 3N wireless communication terminal 40 relay unit 50 radiation dose measurement system 60 data management server 70 wireless LAN communication information terminal 80 communication network 100 radiation monitoring system

Claims (5)

A radiation dose measurement system comprising a plurality of measurement units for measuring a radiation dose and a network management unit for managing a communication network with the measurement unit,
The measurement unit arranged in the premises of facilities handling radioactive materials such as nuclear power plants and the surrounding area ,
It can be driven by a battery,
Measuring means for measuring the radiation dose according to measurement setting information indicating the measurement frequency of radiation dose and the transmission frequency of measurement data;
Measurement data transmission means for transmitting measurement data measured by the measurement means to the network management unit,
The network management unit is:
Measurement data reception means for receiving measurement data transmitted by the measurement data transmission means of the measurement unit;
Radiation dose determination means for determining whether the radiation dose indicated by the measurement data received by the measurement data receiving means is greater than or equal to a predetermined threshold;
If the radiation dose by the dose determining means determines that more than the predetermined threshold value, a request for updating the measurement configuration information to the equivalents said predetermined measurement unit measures the measurement data indicating the threshold value or more radiation dose Update information of the measurement setting information, transmission information that the measurement unit transmits to another measurement unit, and information that indicates processing contents to be executed by the other measurement unit, and the transmission information An update request creating means for creating an update request including a transmission range;
Update request transmission means for transmitting the update request created by the update request creation means to the measurement unit,
The measurement unit further includes
An update request receiving means for receiving an update request transmitted by the update request transmitting means of the network management unit;
Measurement setting information updating means for updating the measurement setting information in accordance with the update content included in the update request in response to the update request being received by the update request receiving means;
Transmission information transmitting means for transmitting the transmission information included in the update request in accordance with the transmission range included in the update request in response to the update request being received by the update request receiving means;
Transmission information receiving means for receiving transmission information transmitted by the transmission information transmitting means of another measurement unit;
Look including an execution unit for executing the processing contents indicated by the transmission information received by said transmission information reception means,
The update request creating unit of the network management unit determines the transmission range with reference to information in which a radiation dose and a hop number are associated with each other,
The radiation information measurement system , wherein the transmission information transmission means of the measurement unit transmits the transmission information by broadcast communication in which the number of hops is limited according to the transmission range .   A radiation dose measurement system comprising a plurality of measurement units for measuring a radiation dose and a network management unit for managing a communication network with the measurement unit,
  The measurement unit is
  It can be driven by a battery,
  Measuring means for measuring the radiation dose according to measurement setting information indicating the measurement frequency of radiation dose and the transmission frequency of measurement data;
  Measurement data transmission means for transmitting measurement data measured by the measurement means to the network management unit,
  The network management unit is:
  Measurement data reception means for receiving measurement data transmitted by the measurement data transmission means of the measurement unit;
  Radiation dose determination means for determining whether the radiation dose indicated by the measurement data received by the measurement data receiving means is greater than or equal to a predetermined threshold;
  When the radiation dose is determined by the radiation dose determination means to be equal to or greater than a predetermined threshold, the measurement setting information update request for the measurement unit that has measured measurement data indicating the radiation dose greater than or equal to the predetermined threshold, Update information of the measurement setting information, transmission information that is information that the measurement unit transmits to another measurement unit and that indicates processing content to be executed by the other measurement unit, and transmission of the transmission information An update request creating means for creating an update request including a range;
  Update request transmission means for transmitting the update request created by the update request creation means to the measurement unit,
  The measurement unit further includes
  An update request receiving means for receiving an update request transmitted by the update request transmitting means of the network management unit;
  Measurement setting information updating means for updating the measurement setting information in accordance with the update content included in the update request in response to the update request being received by the update request receiving means;
  Transmission information transmitting means for transmitting the transmission information included in the update request in accordance with the transmission range included in the update request in response to the update request being received by the update request receiving means;
  Transmission information receiving means for receiving transmission information transmitted by the transmission information transmitting means of another measurement unit;
  Execution means for executing the processing content indicated by the transmission information received by the transmission information receiving means,
  The radiation dose determination unit of the network management unit determines whether the radiation dose indicated by the measurement data measured by the measurement unit is equal to or less than a specific threshold value,
  The network management unit is:
  The measurement data measured by a measurement unit that is different from the measurement unit that measured the radiation dose by the measurement unit when the radiation dose determination unit determines that the radiation dose is equal to or less than a specific threshold is to be compared. Including a comparison target specifying means to specify as
  The radiation dose determination unit determines whether the radiation dose indicated by the measurement data as the comparison target specified by the comparison target specifying unit is equal to or less than the specific threshold value,
  The update request creation means indicates that the radiation dose determination means lowers the measurement frequency of the radiation dose when it is determined that the radiation dose indicated by the measurement data as the comparison target is equal to or less than the specific threshold value. Create an update request
  A radiation dose measurement system characterized by that. The update request creation unit, the other measurement unit according to claim 1 or claim 2 radiation dose measuring system according generates transmission information indicating the processing contents to increase the measurement frequency. The network management unit dose according to any one of claims 3 to rule storage means for storing information relating to the rules for selecting the update target used to create the update request from including claim 1 Measuring system. The network management unit is:
Measurement data storage means for storing measurement data measured by the measurement means of the measurement unit;
Measurement data registration means for registering measurement data received by the measurement data receiving means in the measurement data storage means;
To the measured data display and analysis information processing apparatus capable, either one of claims 4 to measurement data stored in the measurement data storage unit from claim 1 comprising a wireless communication means for providing a wireless communication Radiation dose measurement system according to crab.

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