JP2008291519A - Field management system and field management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform site management simply and appropriately even in a place where the environment can change daily such as a construction site.
A field management system (1) includes a plurality of RFID readers (10) and a management server (30). Each of the plurality of RFID readers 10 is provided in a vehicle 40 that operates at a site that is subject to site management, and includes a tag reading unit 11 that reads tag information stored in the RFID tag 20 by wireless communication, and a plurality of RFID readers 10. An ad hoc network configuration unit 12 configuring an ad hoc network, and a transmission unit that transmits the read tag information to the management server 30 via the ad hoc network. The management server 30 includes receiving means for receiving tag information transmitted from each of the plurality of RFID readers 10 via the ad hoc network.
[Selection] Figure 2

Description

  The present invention relates to a field management system and a field management method for performing field management.

2. Description of the Related Art Conventionally, a technique has been proposed in which an RFID (Radio Frequency IDentification) tag is attached to a worker at a construction site or the like to prevent access to a construction vehicle or entry into a dangerous place (for example, Patent Document 1). And 2). In Patent Document 1, it is determined that the construction machine and the worker are close to each other by providing the construction machine with a reader and attaching an ID tag to the worker and reading the ID tag with the reader. A technique for issuing a warning is described. Further, in Patent Document 2, various operations such as warning to an operator are performed by reading information of an RFID tag attached to a person with an RFID reader installed at a predetermined location.
Japanese Patent Application No. 2003-168174 Japanese Patent Application No. 2004-199243

  However, in Patent Document 1, it is determined that the distance between the construction equipment and the worker is close by the reader and the control device provided in one construction equipment. Warnings based on the positional relationship between and cannot be performed.

  In addition, since the site environment changes day by day due to the progress of construction at a construction site or the like, in the technique described in Patent Document 2, it may be necessary to re-install a leader at a work place or a dangerous place by a construction vehicle. Further, depending on the state of the field environment, there may be a place where the reader's radio wave does not reach. That is, in the above-described conventional technology, it is not possible to appropriately perform on-site management such as safety management and monitoring of the surrounding situation in a place where the environment can change every day such as a construction site.

  The present invention has been made to solve the above problems, and provides a site management system that can easily and appropriately perform site management even in places where the environment can change day by day such as construction sites. The purpose is to do.

  In order to achieve the above object, a field management system according to the present invention is a field management system that performs field management including a plurality of RFID readers and a management server, and each of the plurality of RFID readers Tag reading means provided in a vehicle operating in a target site and reading tag information stored in an RFID tag by wireless communication, ad hoc network constituting means for constituting an ad hoc network by a plurality of RFID readers, and ad hoc network constituting means And transmitting means for transmitting the tag information read by the tag reading means to the management server via the ad hoc network configured by the management server, wherein the management server transmits from each of the plurality of RFID readers via the ad hoc network. Equipped with receiving means to receive the tag information That, characterized in that. An ad hoc network is a network configured by links between a plurality of wireless communication terminals that do not require an access point such as a wireless LAN (also referred to as an autonomous distributed wireless network). In an ad hoc network, communication can be performed directly between terminals or via other terminals.

  In the field management system according to the present invention, since the RFID reader is provided in the vehicle, it is not necessary to install the RFID reader again, and the RFID reader can be arranged at an appropriate position in the field. Further, since the ad hoc network is configured by a plurality of RFID readers, tag information read by the RFID readers is reliably received by the management server and used for field management. Thus, according to the field management system according to the present invention, field management can be performed easily and appropriately.

  It is desirable that the RFID tag includes an RFID tag provided at a predetermined position on the site to be managed by the site. According to this configuration, more appropriate on-site management can be performed based on the position where the RFID reader reads the RFID tag.

  It is desirable that the RFID tag includes an RFID tag provided on a moving body that moves in a site that is a site management target. According to this configuration, it is possible to manage a moving body such as an operator.

  The management server reads the tag information read from the RFID tag provided at a predetermined position and received by the receiving means, the position of the vehicle where the RFID reader that reads the tag information is provided, and the tag information from the RFID reader. It is desirable to further include warning means for specifying at least one of the positions of the mobile body where the read RFID tag is provided, and generating and outputting warning information for issuing a warning based on the specified position. According to this configuration, it is possible to perform a warning according to the position of the vehicle and the moving body, and it is possible to perform on-site management with high safety.

  The warning means outputs the generated warning information by transmitting, and the field management system preferably further includes a warning device that receives the warning information transmitted from the management server and issues a warning. According to this configuration, a warning can be reliably performed.

  It is desirable that the management server further includes a reading time acquisition unit that acquires reading time information indicating a tag reading time at which the tag information received by the receiving unit is read. According to this configuration, more appropriate on-site management can be performed based on the time when the RFID reader reads the RFID tag.

  The tag reading unit acquires reading time information indicating the tag reading time when the tag information is read, and the transmitting unit associates the reading time information acquired by the tag reading unit with the tag information and transmits the tag information to the management server. The reading time acquisition means preferably receives the reading time information transmitted from the RFID reader in association with the tag information. According to this configuration, the time when the RFID reader reads the RFID tag can be obtained more accurately.

  The warning means specifies the moving speed and moving direction of at least one of the vehicle and the moving body from the reading time information acquired by the reading time acquisition means, and issues a warning based on the specified moving speed and moving direction. It is desirable to generate warning information for According to this configuration, it is possible to perform a warning according to the moving speed and moving direction of at least one of the vehicle and the moving body, and it is possible to perform field management with higher safety.

  By the way, the present invention can be described as the invention of the field management system as described below, as well as the invention of the field management system as described below. This is substantially the same invention only in different categories, and has the same operations and effects.

  That is, the field management method according to the present invention is a field management method in a field management system that performs field management, including a plurality of RFID readers and a management server provided in a vehicle that operates in a field subject to field management. Each of the plurality of RFID readers includes a tag reading step for reading tag information stored in the RFID tag by wireless communication, an ad hoc network configuration step for configuring an ad hoc network with the plurality of RFID readers, and an ad hoc network configuration step. Transmitting the tag information read in the tag reading step to the management server via the ad hoc network, and the management server transmits the tag information from each of the plurality of RFID readers via the ad hoc network. information Comprising the step of receiving, characterized in that.

  In the present invention, since the RFID reader is provided in the vehicle, it is not necessary to install the RFID reader again, and the RFID reader can be arranged at an appropriate position in the field. Further, since the ad hoc network is configured by a plurality of RFID readers, tag information read by the RFID readers is reliably received by the management server and used for field management. Thus, according to the present invention, site management can be performed simply and appropriately.

  Hereinafter, preferred embodiments of a field management system and a field management method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 schematically shows a site management system 1 according to the present embodiment. FIG. 2 shows a functional configuration of the site management system 1 according to the present embodiment. The site management system 1 is a system that performs site management such as safety management and monitoring of surrounding conditions at a construction site or the like. More specifically, for example, it is a system for maintaining the safety of a construction site or the like by notifying a danger that an operator is near a construction vehicle or the like. The on-site management system 1 is not limited to the purpose of keeping safety as described above, but is intended to efficiently work such as calculating the amount of work and instructing work. May be. Moreover, the place where the site management system 1 is applied is not limited to a construction site, and includes any place that requires site management.

  As shown in FIGS. 1 and 2, the site management system 1 includes a plurality of RFID readers 10, a plurality of RFID tags 20, and a management server 30. Moreover, as shown also in FIG.1 and FIG.2, it is preferable that the site management system 1 is provided with the warning device 60. FIG.

  The RFID reader 10 is a device that reads tag information stored in the RFID tag 20 from the RFID tag 20 located in the reading range A by wireless communication. As shown in FIG. 1, each RFID reader 10 is provided in a vehicle 40 (generic name for vehicles 40 a to 40 e) that operates in a site that is a site management target. Examples of the vehicle 40 provided with the RFID reader 10 include a concrete pump truck 40a, a crawler crane 40b, a backhoe 40c, and the like. In addition, the RFID reader 10 does not have to be provided in all the vehicles 40, and there may be a vehicle 40 (for example, a concrete mixer truck 40d or a truck 40e in FIG. 1) without the RFID reader 10.

  As shown in FIG. 2, the RFID reader 10 includes a tag reading unit 11, an ad hoc network configuration unit 12, and a transmission unit 13 as functional components.

  The tag reading unit 11 is tag reading means for reading tag information stored in the RFID tag 20 by wireless communication. The tag reading unit 11 has an antenna for performing wireless communication, and reads tag information from the RFID tag 20 located in the reading range A centering on the RFID reader 10 by the antenna. Here, the reading range A is determined by the strength of the radio wave used for wireless communication, and the radio wave strength is set in each RFID reader 10. Specifically, the reading range A is a range from the RFID reader 10 (the antenna thereof) to a distance of about several meters to tens of meters. The RFID reader 10 is desirably provided so that at least the antenna of the tag reading unit 11 comes out of the vehicle 40 in order to reliably read the tag information from the RFID tag 20. Specifically, for example, it is provided in the upper part of the driver's seat. The tag reading unit 11 outputs the read tag information to the transmission unit 13.

  Moreover, it is preferable that the tag reading unit 11 has a clock and acquires reading time information indicating tag reading time when tag information is read from the clock. In that case, the tag reading unit 11 outputs the acquired reading time information together to the transmission unit 13.

  As shown in FIG. 3, the ad hoc network configuration unit 12 is an ad hoc network configuration unit that configures an ad hoc network with a plurality of RFID readers 10. The ad hoc network configuration unit 12 has a mechanism for wireless communication (for an ad hoc network) different from the tag reading unit 11. As a function for configuring the ad hoc network, an existing technology can be used.

  The transmission unit 13 is a transmission unit that transmits the tag information read by the tag reading unit 11 to the management server 30 via the ad hoc network configured by the ad hoc network configuration unit 12. When transmitting the tag information, the transmission unit 13 associates the tag information with information (for example, an ID for identifying the RFID reader 10) that identifies the subject (RFID reader 10) that is the subject that has read the tag information, Send along with information. When the reading time information is also input from the tag reading unit 11, the transmission unit 13 transmits the reading time information in association with the tag information. The transmission unit 13 stores in advance information for performing the above transmission, such as the address of the management server 30, and performs transmission based on the information.

  The RFID reader 10 is configured by hardware such as an antenna, a communication module, and a CPU, and the above functions are exhibited by the operation of these components. In addition, when the place to be subjected to site management is outdoors, it is desirable to use a solar cell as a power supply source for operating the RFID reader 10. This configuration eliminates the need for battery replacement and wiring.

  Note that the site management system 1 may include an RFID reader 70 that is not provided in the vehicle 40 but is fixedly provided at a predetermined position. In that case, it is desirable that the place where the RFID reader 70 is provided is a place where the environment in the field does not change.

  The RFID tag 20 (generic name for the RFID tags 20a and 20b) is a reading target of the RFID reader 10 and stores tag information for each RFID tag 20. The tag information includes a tag ID that identifies the RFID tag 20. In addition, the tag information may include other information used for site management. The RFID tag 20 includes an IC (Integrated Circuit), and stores tag information in the IC. The RFID tag 20 includes an RFID tag 20a provided at a predetermined position in a site to be managed in the field and an RFID tag 20b provided in a moving body that moves in the site to be managed in the field. There is.

  Specifically, the RFID tag 20a provided at a predetermined position is attached to, for example, a ground surface or a building at a construction site. Since the RFID tag 20a is used to specify the position of the RFID reader 10 that has read the RFID tag 20a, it is preferable that the RFID tag 20a be provided at an appropriate interval (for example, an interval slightly smaller than the reading range of the RFID reader 10). .

  As shown in FIG. 1, the mobile body provided with the RFID tag 20 b includes a vehicle 40 (including both those provided with the RFID reader 10 and those not provided), and work performed on the site subject to site management. There are 50 persons. The worker 50 includes a person who works without getting on the vehicle 40 and a person who works on the vehicle 40 (vehicle operator).

  The management server 30 is a device for receiving tag information transmitted from each of the RFID readers 10 and performing processing for site management based on the tag information. As shown in FIG. 2, the management server 30 includes a receiving unit 31, a data storage unit 32, and a warning unit 33 as functional components.

  The receiving unit 31 is a receiving unit that receives tag information transmitted from each of the plurality of RFID readers 10 via an ad hoc network. The receiving unit 31 has the same function as the ad hoc network configuration unit 12 of the RFID reader. That is, as shown in FIG. 3, the receiving unit 31 can be connected to an ad hoc network formed by the RFID reader 10 (that is, the management server 30 can be a component of the ad hoc network).

  Thereby, even if the RFID reader 10 cannot directly communicate with the management server 30 (for example, the RFID reader 10a in FIG. 3), other RFID readers 10 (for example, the RFID readers 10b and 10c in FIG. 3). ) Can send and receive information. The receiving unit 31 also receives information that identifies the RFID reader 10 that has read the tag information associated with the tag information. The receiving unit 31 stores each received information in the data storage unit 32.

  When the reading time information related to the tag information is associated with the tag information, the receiving unit 31 receives the reading time information. That is, the receiving unit 31 is also a reading time acquisition unit that acquires information indicating the tag reading time when the received tag information is read.

  The acquisition of the reading time information is not necessarily received from the RFID reader 10. For example, the time when the receiving unit 31 receives the tag information may be set as the tag reading time for the tag information. However, the tag information may not be read by the receiving unit 31 immediately after being read by the RFID reader 10 due to the configuration of the RFID reader 10 or the radio wave state of the ad hoc network. Therefore, in order to acquire more accurate reading time information, it is preferable that the acquisition of reading time information is received from the RFID reader 10.

  The data storage unit 32 is means for storing tag information input from the receiving unit 31. Specifically, the tag ID included in the tag information, the information specifying the RFID reader 10 that has read the tag information, and the reading time information related to the tag information are stored in association with each other.

  In addition, the data storage unit 32 stores information necessary for performing a warning based on the tag information. Specifically, the attribute information of the RFID tag 20 related to the tag information is stored in association with the tag information. More specifically, information for identifying an object on which the RFID tag 20 is provided (information on whether the RFID tag 20a is provided at a predetermined position or an RFID tag 20b provided on a moving body), and the RFID tag 20a provided at a predetermined position. If there is information (for example, information indicating latitude and longitude, or information indicating three-dimensional coordinates) specifying the position where the RFID tag 20a is provided, and movement provided if the RFID tag 20b is provided on the moving body. Information identifying the body. In addition, the worker name, job type, work range, construction vehicle name, relationship between the RFID tags 20 (relation between the worker 50 and the vehicle 40), and the like are stored. Information on these attributes is input and stored in advance in the data storage unit 32 by an administrator of the site management system 1 or the like.

  In addition, the data storage unit 32 relates to the tag ID included in the tag information calculated and correlated by the warning unit 33 based on the tag information read by the RFID reader 10 and the tag information. Read time information and information indicating the position of the RFID tag 20 are stored. This information is information indicating where and at what time the RFID tag 20 was located. That is, the information indicates where and when the vehicle 40 and the worker 50 provided with the RFID reader or the RFID tag 20 are located.

  The information stored in the data storage unit 32 is not only used for on-site management warnings as will be described later, but also used for grasping the traffic lines and the work amount of the vehicle 40 and the worker 50 at the site. Also good. The information stored in the data storage unit 32 may be referred to when setting the radio wave intensity of the tag reading unit 11 that determines the reading range A of the RFID reader 10.

  The warning unit 33 is a warning unit that generates and outputs warning information for warning based on the tag information received by the receiving unit 31 and stored in the data storage unit. The warning here is for informing a worker who is working on the site to be managed by the site management system 1 or a manager who manages the site of the danger or the like. As warning information, there is character information used for display that informs that there is a danger in the display device by characters, or voice information that is used for output that informs the user that there is danger in a sound output device such as a speaker. .

  The warning unit 33 specifies the position of the vehicle 40 and the position of the worker 50 from the tag information read from the RFID tag 20a provided at a predetermined position, and performs a warning based on the specified position. Generate and output warning information. The position may be specified for at least one of the vehicle 40 and the worker 50. In addition, the warning unit 33 stores information indicating rules for warning in advance as described later, and generates and outputs warning information based on the information.

  The warning unit 33 identifies the position of the vehicle 40 and the position of the worker 50 as follows. First, the warning unit 33 acquires a tag ID and information for specifying the RFID reader 10 associated with the tag ID from the data storage unit 32. Subsequently, with reference to the attribute information of the RFID tag 20 stored in the data storage unit 32, it is determined whether there is a tag ID related to the RFID tag 20a provided at a predetermined position. When it is determined that there is an RFID tag 20a provided at a predetermined position among the acquired tag IDs, the RFID tag 20 related to another tag ID read by the RFID reader 10 that has read the tag ID is It is specified as existing at a predetermined position.

  That is, the RFID tag 20 read by the RFID reader 10 that has read the RFID tag 20a provided at a predetermined position (at the timing when the RFID tag 20a is read) is specified as being present at the predetermined position. The Here, the warning unit 33 acquires information indicating the position of the RFID tag 20 a provided at a predetermined position from the data storage unit 32. The identification of the RFID tag 20 corresponds to the identification of the positions of the vehicle 40 and the worker 50. Further, when the reading time information is stored as information of the tag reading result in the data storage unit 32, the warning unit 33 specifies the position for each reading time information. The warning unit 33 stores the information on the position of the identified RFID tag 20 in the data storage unit 32 in association with the tag ID and the reading time information.

  The warning unit 33 generates warning information based on the position of the vehicle 40 and the position of the worker 50 specified as described above. For example, the warning information is generated when a region to be warned is set in advance for each of the vehicle 40 and the worker 50 and the position of the specified vehicle 40 and the worker 50 enters a position to be warned. It generates as what warns with respect to the said vehicle 40 and the operator 50. FIG. Specifically, when the vehicle 40 is in a preset danger area, warning information is generated.

  In addition, a distance relationship to be warned between the vehicle 40 and the worker 50 is set in advance, a distance relationship is calculated from the identified positions of the vehicle 40 and the worker 50, and the distance relationship should be warned. If it is within the range, it is generated as a warning for the vehicle 40 and the worker 50. Specifically, when a certain worker is near a certain vehicle 40, warning information is generated. Note that depending on the worker 50 (for example, the operator of the vehicle 40), it may be appropriate to be near the vehicle 40, so that warning information is not generated for the relationship between the worker 50 and the vehicle 40. Set in advance.

  Further, the warning unit 33 specifies the moving speed and moving direction of the vehicle 40 and the worker 50 from the reading time information corresponding to the positions of the specified vehicle 40 and the worker 50, and the specified moving speed. And warning information based on the moving direction is generated. The warning unit 33 specifies the moving speed and the moving direction by calculating from the change in position and the change in time based on the information of the plurality of reading time information.

  For generating warning information, for example, a relationship for warning is set in advance between the vehicle 40 and the worker 50, or between the vehicle 40 and the worker 50 and the dangerous area, and the warning information is moved at the specified moving speed and moving direction. If it continues, it will generate | occur | produce as what warns with respect to the said vehicle 40 and the operator 50, when the distance between those relations becomes small. Specifically, warning information is generated when the worker 50 is heading to the vehicle 40 or a dangerous area. Here, the specification of the moving speed and the moving direction and the generation of warning information may be performed for at least one of the vehicle 40 and the worker 50.

  Note that the warning unit 33 does not necessarily have to generate the warning information by specifying the position of each management target such as the vehicle 40 and the worker 50 as described above. That is, the warning unit 33 may identify a relative positional relationship based on the read tag information and generate warning information based on the positional relationship.

  For example, when the RFID reader 10 provided in the vehicle 40 reads tag information from the RFID tag 20 provided in the dangerous area, it is determined that the vehicle 40 is in the dangerous area, and a warning is given to the vehicle 40. Information may be generated. In addition, when the RFID reader 10 provided in the vehicle 40 reads tag information from the RFID tag 20 provided in the worker 50 or another vehicle 40, it is determined that they are close to each other and warning information is displayed. It may be generated.

  The warning unit 33 performs output by transmitting the generated warning information to the warning device 60 corresponding to the warning content. The warning unit 33 stores information indicating to which warning device 60 the warning information is to be transmitted according to the warning content, and determines the transmission destination based on the information. Further, the warning information need not be output to the warning device 60. For example, it may be transmitted to a terminal referred to by the manager of the site management system 1 so that the manager determines whether or not to give a warning.

  The management server 30 is configured by hardware such as an antenna, a communication module, and a CPU, and exhibits functions by operating these components.

  The warning device 60 is a device that warns the worker 50 by receiving warning information from the management server 30 by wireless communication and performing output based on the warning information. The warning device 60 is a portable device, and is carried by a worker 50 in the field as shown in FIG. When the warning information is character information, the output based on the warning information is performed by being displayed on a display device such as a display provided in the warning device 60. When the warning information is audio information, the warning information is output from an output device such as a speaker provided in the warning device 60. The above is the configuration of the site management system 1 according to the present embodiment.

  Subsequently, the operation (site management method) of the site management system 1 according to the present embodiment will be described using the flowchart of FIG. The radio wave intensity of the tag reading unit 11 that determines the reading range A of the RFID reader 10 is set in advance.

  In the field management system 1, first, an ad hoc network is configured between the plurality of RFID readers 10 provided in the vehicle 40 by the ad hoc network configuration unit 12 of each RFID reader 10 (S 01, ad hoc network configuration step). A management server 30 is connected to the ad hoc network, and information can be transmitted and received between each RFID reader 10 and the management server 30.

  Subsequently, tag information is read from the RFID tag 20 by the tag reading unit 11 of each RFID reader 10 (S02, tag reading step). The read tag information is associated with the read RFID reader 10 information and reading time information, and is transmitted from the transmission unit 13 of the RFID reader 10 to the management server 30 via the ad hoc network. In the management server 30, the transmitted tag information is received by the reception unit 31 (S03, transmission step, reception step).

  In the management server 30, the received tag information is stored in the data storage unit 32 together with the associated information. Subsequently, the tag unit is referred to by the warning unit 33, and the position of the vehicle 40 where the RFID reader 10 is provided and the position of the worker 50 where the RFID tag 20 is provided are specified (S04, warning step). Information regarding the specified position is stored in the data storage unit 32. Subsequently, warning information is generated by the warning unit 33 based on the position specified as described above (S05, warning step). The generation of the warning information may be performed based on the moving speed and moving direction of the vehicle 40 and the worker 50 as described above.

  Subsequently, the generated warning information is transmitted from the warning unit 33 to the warning device 60 corresponding to the warning information. The warning device 60 receives the warning information and issues a warning (S06, warning step). By this warning, the worker 50 or the like holding the warning device 60 can know the danger according to the warning content.

  Note that the generation and transmission of the warning information is performed only when a condition for performing the warning is satisfied, and is not always performed. Further, the processes of S02 to S06 are repeated while the site management by the site management system 1 is being performed.

  As described above, in the field management system 1 according to the present embodiment, since the RFID reader 10 is provided in the vehicle 40, it is not necessary to install the RFID reader again. In addition, since a warning is often given at the construction site or the like that the vehicle 40 is approaching, the RFID reader 10 can be disposed at an appropriate position in the site.

  In addition, since the ad hoc network is configured by the plurality of RFID readers 10, the tag information read by the RFID reader 10 is reliably received by the management server 30 and used for field management. Specifically, even if the vehicle 40 provided with the RFID reader 10 is located in a place where it is difficult to perform direct wireless communication with the management server 30, the information is reliably transmitted to the management server 30 via the other RFID reader 10. Can be sent. Thus, according to the field management system 1 according to the present embodiment, the field management can be performed easily and appropriately.

  As in the present embodiment, the RFID tag 20 used in the site management system 1 desirably includes an RFID tag 20a provided at a predetermined position in the site that is a site management target. According to this configuration, more appropriate on-site management can be performed based on the position where the RFID reader 10 has read the RFID tag 20a. Note that the RFID tag 20a is very small compared to the RFID reader 10 and the like, so that it can be easily fixed at a predetermined position on the site, and the cost for providing can be reduced.

  In addition, as in the present embodiment, the RFID tag 20 used in the site management system 1 desirably includes the RFID tag 20b provided to the worker 50 who moves at the site to be managed on site. According to this configuration, it is possible to manage a moving body such as the worker 50.

  Further, as in the present embodiment, it is desirable to identify the positions of the vehicle 40 and the worker 50 from the read tag information and issue a warning based on the positions. According to this structure, highly safe site management can be performed and a disaster can be prevented. Further, if the warning device 60 is used as described above, a warning can be surely performed.

  Further, if the reading time information obtained by reading the tag information from the RFID tag 20 is acquired and used for on-site management, more appropriate on-site management can be performed. Furthermore, if the moving speed and moving direction of the vehicle 40 and the worker 50 are specified from the read time information and used for warning, the movement of the vehicle 40 and the worker 50 is monitored in real time, When it is expected, a warning can be given in advance, and field management with higher safety can be performed.

It is a figure showing a schematic structure of a field management system concerning an embodiment of the present invention. It is a figure which shows the functional structure of the site management system which concerns on embodiment of this invention. It is a figure which shows the ad hoc network comprised by an RFID reader. It is a flowchart which shows operation | movement (site management method) of the site management system which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Site management system, 10 ... RFID reader, 11 ... Tag reading part, 12 ... Ad hoc network structure part, 13 ... Transmission part, 20 ... RFID tag, 30 ... Management server, 31 ... Reception part, 32 ... Data storage part , 33 ... warning unit, 40 ... vehicle, 50 ... worker, 60 ... warning device.

Claims (9)

A site management system for site management, including a plurality of RFID readers and a management server,
Each of the plurality of RFID readers is
It is installed in a vehicle that operates at the site subject to site management,
Tag reading means for reading tag information stored in the RFID tag by wireless communication;
Ad hoc network configuration means for configuring an ad hoc network by the plurality of RFID readers;
Sending means for sending the tag information read by the tag reading means to the management server via an ad hoc network constituted by the ad hoc network constituting means,
The management server includes receiving means for receiving the tag information transmitted from each of the plurality of RFID readers via the ad hoc network.
On-site management system characterized by that.   The field management system according to claim 1, wherein the RFID tag includes an RFID tag provided at a predetermined position in a site to be the site management target.   The field management system according to claim 2, wherein the RFID tag includes an RFID tag provided on a moving body that moves in a site that is a target of the field management.   The management server reads the tag information read from the RFID tag provided at a predetermined position and received by the receiving means, and the position of the vehicle where the RFID reader that reads the tag information is provided, and the RFID reader Warning means for generating and outputting warning information for specifying at least one of the positions of the mobile body provided with the RFID tag from which the tag information has been read, and performing warning based on the specified position is further provided. The field management system according to claim 3 characterized by things. The warning means outputs by transmitting the generated warning information,
The field management system according to claim 4, further comprising a warning device that receives warning information transmitted from the management server and issues a warning.   6. The management server according to claim 4, further comprising reading time acquisition means for acquiring reading time information indicating tag reading time at which the tag information received by the receiving means is read. The field management system according to one item. The tag reading means acquires reading time information indicating a tag reading time when the tag information is read,
The transmission means associates the reading time information acquired by the tag reading means with the tag information and transmits the information to the management server.
The reading time acquisition means receives reading time information transmitted in association with the tag information from the RFID reader.
The field management system according to claim 6 characterized by things.   The warning means specifies the moving speed and moving direction of at least one of the vehicle and the moving body from the reading time information acquired by the reading time acquiring means, and sets the moving speed and moving direction to the specified moving speed and moving direction. 8. The site management system according to claim 6 or 7, wherein warning information for generating a warning based on the information is generated. A site management method in a site management system that performs site management, including a plurality of RFID readers and a management server provided in a vehicle that operates in a site that is a site management target,
Each of the plurality of RFID readers is
A tag reading step for reading the tag information stored in the RFID tag by wireless communication;
An ad hoc network configuration step of configuring an ad hoc network with the plurality of RFID readers;
Transmitting the tag information read in the tag reading step to the management server via the ad hoc network configured in the ad hoc network configuration step, and
The management server includes a receiving step of receiving the tag information transmitted from each of the plurality of RFID readers via the ad hoc network;
On-site management method characterized by this.

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