JP2018185781A - Data collection device, data collection system, data server, data collection method, data collection program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data collection device, a data collection system, a data server, a data collection method, a data collection program and a recording medium, which enable stable and highly reliable analysis by time stamping of data acquired from a data input device. To do. A collection device includes a data collection unit that collects data from a device that outputs data, a time stamp addition unit that adds a time stamp to the collected data, and data that stores the time stamped data. A timing generator that generates the timing to transmit the stored data to the storage unit and a data server that is communicably connected via the first network, and a data transmission that is transmitted from the data server. It includes a request information acquisition unit that acquires the request information to be requested, and a data transmission unit that transmits data stored to the data server based on the generated timing and according to the acquired request information. [Selection diagram] Fig. 1

Description

  The present invention relates to a data collection device, a data collection system, a data server, a data collection method, a data collection program, and a recording medium.

  Conventionally, industrial plants such as chemicals, wells such as gas fields and oil fields, plants that manage and control gas and oil transportation facilities and their surroundings, plants that manage and control power generation such as hydropower, thermal power, and nuclear power, solar power In plants and factories such as plants that manage and control energy harvesting such as wind and wind, plants that manage and control water and sewage, dams, etc. (hereinafter referred to as “plants” when these are collectively referred to), they are called field devices. A distributed control system (DCS), a supervised control and data acquisition (SCADA) system, etc. in which field devices such as a measuring instrument or an operating device and a control device for controlling these devices are connected via communication means. Constructed and realized advanced automatic operation It has been.

In such a control system, PLC (Programmable Logic)
A control device such as a controller collects data from data input devices such as a plurality of sensors to control the plant, and transmits the collected data to a host system that monitors the plant. Data transmission to the host system is performed, for example, at regular time (predetermined time) and at regular intervals (predetermined cycle). Further, data is accumulated in a data buffer or the like, and when the accumulated data amount reaches a predetermined value, the data buffer transmits data to the host system.

  In addition, there is a device that transmits data collected from a data input device with a time stamp indicating the time when the data was collected (for example, see Patent Documents 1 and 2).

  In addition, abnormalities that occur in data input devices such as sensors installed in the plant include abnormalities caused by failure of the data input device itself, and the measurement environment of the data input device even if the data input device itself is normal. There are abnormalities caused. Abnormalities caused by the measurement environment include, for example, adhesion of an insulator to a sensor for measuring electrode impedance, clogging of a pressure guiding tube for measuring pressure, generation of bubbles during flow measurement, etc. in a data input device. . There are devices that can measure anomalies caused by this measurement environment (see, for example, Patent Documents 3 to 5).

JP, 2015-141679, A JP 2011-142441 A JP 2003-097986 A JP 2007-256231 A JP 2006-090516 A

  However, in the conventional control system, the data transmitted to the host system is temporarily stored in the data buffer and transmitted, so there is a delay between acquiring the data from the data input device and transmitting it to the host system. However, data cannot be monitored in real time in the host system.

  In addition, when adding a time stamp to data, there is a case where data analysis based on the time of the time stamp cannot be performed in the host system if the clock accuracy and the timing for adding the time stamp in the time stamp adding device are different.

  In addition, if communication between the data input device or data buffer and the host system is long distance or a telephone line is used and the communication status becomes unstable, data may not be collected in the host system. It was.

  In addition, when a problem occurs in the data input device, the reliability of the data may be lowered, for example, an error in the acquired data increases.

  The present invention has been made in view of the above circumstances, and enables a data collection device, a data collection system, a data server, data, which enables stable and reliable analysis based on a time stamp of data acquired from a data input device. It is an object to provide a collection method, a data collection program, and a recording medium.

  (1) In order to solve the above problems, a data collection device of the present invention includes a data collection unit that collects the data from a device that outputs data, and a time stamp addition unit that adds a time stamp to the collected data And a timing for generating a timing for transmitting the stored data to a data storage unit that stores the data to which the time stamp is added and a data server that is communicably connected via the first network. A generation unit, a request information acquisition unit that acquires request information for requesting transmission of the data, transmitted from the data server, based on the generated timing, and according to the acquired request information, A data transmission unit configured to transmit the data stored to the data server.

  (2) Moreover, in the data collection device of the present invention, the request information acquisition unit transmits from the data server in response to a request from a host system communicably connected to the data server via a second network. The request information is acquired.

  (3) In the data collection device of the present invention, the time stamp adding unit adds the time stamp based on the time obtained from GPS information.

  (4) In the data collection device of the present invention, the data collection unit collects status information of the device together with the data, and the data transmission unit transmits the status information together with the data. To do.

  (5) In the data collection device of the present invention, the data collection unit collects, as the status information, a self-diagnosis result obtained by diagnosing whether or not the device is abnormal.

  (6) In the data collection device of the present invention, the data collection unit collects, as the status information, an advanced diagnosis result obtained by diagnosing the measurement environment of the device in the device.

  (7) In the data collection device of the present invention, the data transmission unit further transmits an alarm issued from the device when the device is not normal.

  (8) In the data collection device of the present invention, the first network includes a communication path for wireless communication, and the data transmission unit transmits the data to the data server via wireless communication.

  (9) In order to solve the above problem, a data collection system of the present invention includes a data collection device and the data server.

  (10) In the data collection system of the present invention, the data server includes a request information generation unit that generates the request information in response to a request from a host system, and the generated request information is transmitted to the first network. A request information transmission unit that transmits to the data collection device via the data collection unit, a data acquisition unit that acquires the data transmitted from the data collection device, a database that stores the acquired data, and the database A server data transmission unit that transmits the stored data to the host system.

  (11) In the data collection system of the present invention, the data server further includes a data analysis unit that analyzes whether or not the data stored in the database satisfies a predetermined condition, and the server data transmission unit Transmits the unsent data when it is analyzed that the predetermined condition is not satisfied, and is transmitted in the past with the unsent data when it is analyzed that the predetermined condition is satisfied. The data is transmitted together.

  (12) In the data collection system of the present invention, the data acquisition unit acquires the data from a plurality of the data collection devices.

  (13) In order to solve the above-described problem, the data server of the present invention can communicate via the first network in response to a request from a host system communicably connected via the second network. A request information generation unit that generates request information for requesting transmission of data of a device that outputs data to a connected data collection device, and a request for transmitting the generated request information to the data collection device An information transmission unit, a data acquisition unit for acquiring the data transmitted from the data collection device based on the timing generated in the data collection device and in response to the request information, and the acquired data A database to be stored, and server data for transmitting the data stored in the database to the host system via the second network And a transmitter.

  (14) In order to solve the above-described problem, the data collection method of the present invention includes a data collection step for collecting the data from a device that outputs data, and a time stamp addition step for adding a time stamp to the collected data. And a data storage step for storing the data with the time stamp added thereto, and a timing for generating a timing for transmitting the stored data to a data server that is communicably connected via the first network. A generation step, a request information acquisition step for acquiring request information for requesting transmission of the data, transmitted from the data server, based on the generated timing, and according to the acquired request information, A data transmission step of transmitting the stored data to the data server.

  (15) In order to solve the above problems, a data collection program of the present invention includes a data collection process for collecting the data from a device that outputs data, and a time stamp addition process for adding a time stamp to the collected data And a data storage process for storing the data to which the time stamp is added, and a timing for generating a timing for transmitting the stored data to a data server that is communicably connected via the first network. Based on the generation process, the request information acquisition process that is transmitted from the data server, and acquires the request information for requesting the transmission of the data, the generated timing, and according to the acquired request information, Causing a computer to execute a data transmission process for transmitting the stored data to the data server. .

  (16) In order to solve the above problem, a recording medium of the present invention includes a data collection process for collecting the data from a device that outputs data, and a time stamp addition process for adding a time stamp to the collected data. A data storage process for storing the data with the time stamp added thereto, and timing generation for generating a timing for transmitting the stored data to a data server connected to be communicable via the first network. Processing, request information acquisition processing for acquiring request information for requesting transmission of the data transmitted from the data server, based on the generated timing, and according to the acquired request information, Data collection for causing a computer to execute data transmission processing for transmitting the data stored to the data server It has recorded the program.

  According to the present invention, a data collection device, a data collection system, a data server, a data collection method, a data collection program, and a recording that enable stable and reliable analysis based on a time stamp of data acquired from a data input device A medium can be provided.

It is a block diagram showing an example of a software configuration of a data collection system including a data collection device in an embodiment. It is a block diagram which shows an example of the hardware constitutions of the data collection system containing the data collection device in embodiment. It is a flowchart which shows an example of the data collection operation | movement of the data collection device in embodiment. It is a flowchart which shows an example of the data transmission operation | movement of the data collection device in embodiment. It is a flowchart which shows an example of the data transmission operation | movement of the data server in embodiment. It is a figure which shows an example of the data preserve | saved at the data collection device in embodiment. It is a figure which shows an example of the data preserve | saved at the data server in embodiment. It is a block diagram which shows another example of the software configuration of the data collection system containing the data collection device in embodiment. It is a figure which shows another example of the data preserve | saved at the data collection device in embodiment. It is a block diagram showing an example of a data collection system including a plurality of data collection devices in an embodiment.

  Hereinafter, a data collection device, a data collection system, a data server, a data collection method, a data collection program, and a recording medium according to an embodiment of the present invention will be described in detail with reference to the drawings.

  First, the software configuration of the data collection system will be described with reference to FIG. FIG. 1 is a block diagram illustrating an example of a software configuration of a data collection system including a data collection device according to the embodiment.

  In FIG. 1, the data collection system 1 includes a data collection device 10, a data server 20, and a host system 30. The data collection device 10 has functions of a data collection unit 101, a time stamp addition unit 102, a data storage unit 103, a timing generation unit 104, a request information acquisition unit 105, and a data transmission unit 106. The data server 20 has functions of a request information generation unit 201, a request information transmission unit 202, a data acquisition unit 203, a database 204, a server data transmission unit 205, a data analysis unit 206, and an OPC server 207. The data collection device 10 is connected to the GPS device 51 via the time server 50. The time server 50 is connected via the GPS device 51. The data collection device 10 and the data server 20 are connected via a first network 91. In addition, the data server 20 and the host system 30 are connected via a second network 92.

  Each of the above functions of the data collection device 10 in the present embodiment will be described as a functional module realized by a data collection program (software) that controls the data collection device 10. The above-described functions of the data server 20 will be described as function modules realized by a data server program (software) that controls the data server 20.

  The data collection device 10 is connected to a plurality of sensors (sensor group) such as the sensor A1 and the sensor A2. The data collection device 10 is a device that instructs a control device such as a PLC or a control device such as a PLC, for example. The sensor A1 and the like are data input devices (hereinafter, may be abbreviated as “devices”) that generate data (electric signals) representing physical quantities (pressure, temperature, etc.) such as a differential pressure gauge, a thermometer, and a flow meter. is there. The data collection device 10 acquires data from the sensor group and controls a plant process or the like (not shown). The number and type of sensors connected to the data collection device 10 are arbitrary.

  The data collection unit 101 collects data output from a sensor group such as the sensor A1 exemplified as a device. The data collection unit 101 is, for example, a program that controls an input module for collecting PLC data. That is, the data collection unit 101 may be a PLC program or a program that instructs the PLC to operate. The PLC input module allows, for example, one module 6-channel or 12-channel analog input. The data collected by the data collection unit 101 is, for example, a current value of 4 to 20 mA or a voltage value of 0 to 5V. The data collection unit 101 converts the current value collected in the input module into a digital value (AD conversion).

  The data collection unit 101 collects status information indicating whether or not a device that outputs data is normal along with the data. For example, a device such as a sensor that outputs important data used for process control can output a measurement value of the sensor and status information indicating whether the sensor is operating normally. The data collection unit 101 can improve the reliability of acquired data by collecting the status information together with the data.

  The time stamp adding unit 102 adds a time stamp to the data collected by the data collecting unit 101. The time stamp is time information indicating the date and time, and is added to the data collected by the data collection unit 101. The time stamp adding unit 102 acquires time information from the time server 50.

The data storage unit 103 stores data with a time stamp added. The data storage unit 103 includes, for example, an HDD (Hard Disk Drive), a RAM (Random)
Access Memory).

  When the data collection unit 101 acquires status information indicating whether or not the device is normal in the data collection unit 101, the data storage unit 103 stores the acquired status information together with the data.

  The timing generation unit 104 generates a timing (signal) for transmitting the data stored in the data storage unit 103 to the data server 20 that is communicably connected via the first network 91. For example, the timing generation unit 104 determines whether or not a predetermined sampling period has elapsed, and generates timing for each sampling period. The timing generation unit 104 may generate the timing by determining whether the number of data stored in the data storage unit 103 and the data amount have reached a predetermined value. For example, when a plurality of data collection devices are connected to the data server 20, the timing generation unit 104 of each data collection device may generate timing asynchronously.

  The request information acquisition unit 105 is request information that is transmitted from the data server 20 in response to a request from the host system 30 that is communicably connected to the data server 20 via the second network 92. To get. The host system 30 makes a data acquisition request to the data server 20. In response to the acquisition request transmitted from the host system 30, the data server 20 transmits request information for requesting data transmission to the data collection device 10. The request information acquisition unit 105 acquires request information transmitted from the data server 20 using the communication protocol of the first network 91. The data server 20 may be configured to operate independently even when the host system 30 is not interposed.

  The data transmission unit 106 transmits data to the data server 20 via the first network 91 based on the timing generated by the timing generation unit 104 or according to the request information acquired by the request information acquisition unit 105. Data stored in the storage unit 103 is transmitted. That is, the data transmission unit 106 can spontaneously transmit data based on the timing generated by the timing generation unit 104 and can transmit data in response to a request from the host system 30. For this reason, for example, when there is no significant change in the device data, the transmission frequency in the second network can be reduced by reducing the transmission frequency at the timing with a long cycle generated in the timing generation unit 104. On the other hand, for example, when a large change occurs in the device data, the data is transmitted at a high frequency in a short cycle in response to a request from the host system 30 to transmit data with high time resolution and close to real time. Can be provided.

  When the data collection unit 101 acquires status information indicating whether or not the device is normal in the data collection unit 101, the data transmission unit 106 transmits the acquired status information together with the data to the data server 20. In addition, when it has a function which can issue an alarm (ALARM) when a device is abnormal, the alarm (ALARM) may be transmitted to the data server side.

  The data transmission unit 106 communicates with the data server 20 via the first network 91 based on the timing generated by the timing generation unit 104 or according to the request information acquired by the request information acquisition unit 105. The communication status (Status) of whether or not it is possible is monitored. When the communication state is communicable, the data transmission unit 106 generates a transmission event (Upload event). The data transmission unit 106 transmits (Uploads) the data stored in the data storage unit 103 to the data server 20 in a transmission event. On the other hand, when the communication state is not communicable, the data transmission unit 106 waits until the communication state becomes communicable. As a result, even when the communication state of the first network 91 is unstable, it is possible to reliably transmit data.

  The first network 91 may include a communication path for wireless communication. For example, when the data server 20 and the data collection device 10 are separated from each other, the installation cost of the first network 91 may be reduced by performing wireless communication between the data server 20 and the data collection device 10. . For example, mobile communication may be used for the wireless communication. The data transmission unit 106 transmits data to the data server 20 via wireless communication.

  In addition, the transmission of data from the data transmission unit 106 to the data server 20 has been described in the case where the data transmission unit 106 performs so-called push-type transmission in which transmission timing is achieved, but the data transmission unit 106 transmits data to the data server 20. So-called pull-type transmission may be performed in which the acquisition timing is requested in the data server 20.

The time server 50 is a server that provides time information to the data collection device 10.
The time server 50 acquires GPS (Global Positioning System) information from the GPS device 51, and provides time information included in the GPS information to the data collection device 10. By the way, when the communication between the time server 50 and the data collection device 10 is slow or disconnected, the time information provided to the data collection device 10 becomes unstable. Therefore, it is desirable that the time server 50 and the data collection device 10 can communicate stably. In the present embodiment, stable communication is possible by directly connecting the data collection device 10 and the time server 50 without going through a network. Therefore, for example, in a data collection system in which a plurality of data collection devices 10 arranged at remote locations are connected to the data server 20, it is desirable to provide a time server 50 for each data collection device 10. By providing the time server 50 for each data collection device 10, it is possible to improve the time accuracy of the time stamp.

  Note that the time server 50 may acquire time information from other than GPS information. For example, the time server 50 may set the time using an Internet time providing service that provides a standard time. As a result, accurate time information can be provided to the data collection device 10 even indoors where it is difficult to receive radio waves from GPS satellites.

  As described above, the data server 20 has the functions of the request information generation unit 201, the request information transmission unit 202, the data acquisition unit 203, the database 204, the server data transmission unit 205, the data analysis unit 206, and the OPC server 207.

  The request information generation unit 201 generates request information for requesting the data collection device 10 to transmit data in response to a request from the host system 30. The request information is, for example, a command conforming to the protocol of the first network 91. The data server 20 is communicably connected to the data collection apparatus 10 via the first network 91 and is communicably connected to the host system 3 via the second network 92. That is, the request information generation unit 201 generates request information that conforms to the protocol of the first network 91 based on a request from the host system 30 that conforms to the protocol of the second network 92. For example, when the first network 91 is a network using a telephone line, the request information generation unit 201 generates request information in a command that conforms to the telephone line protocol.

  The request information transmission unit 202 transmits the request information generated by the request information generation unit 201 to the data collection device 10 via the first network 91. Similar to the data transmission unit 106, the request information transmission unit 202 monitors the communication state of the first network 91 and transmits request information when the communication state becomes communicable.

  The data acquisition unit 203 acquires data transmitted from the data collection device 10. Data transmission from the data collection device 10 is executed by a transmission event generated in the data transmission unit 106 as described above. The data acquisition unit 203 acquires data transmitted in the transmission event. The data acquisition unit 203 can acquire status information indicating whether or not the device is normal along with the data. In addition, when it has a function which can issue an alarm (ALARM) when a device is abnormal, the alarm (ALARM) may be transmitted to the data server side.

  The database 204 stores data acquired by the data acquisition unit 203. The database 204 is database software, for example, and data is stored in a storage medium such as an HDD or a RAM. For example, the database 204 stores the acquired data and device information such as status information of the device that output the data together.

  The server data transmission unit 205 transmits the data stored in the database 204 to the higher system 30 via the second network 92. The server data transmission unit 205 controls communication conforming to the protocol of the second network 92. Note that the server data transmission unit 205 may transmit data using an OPC server function of the OPC server 207 described later.

  The data analysis unit 206 analyzes whether the data stored in the database 204 satisfies a predetermined condition. The predetermined condition is, for example, a case where the rate of change of data over time is a predetermined numerical value or more. The data analysis unit 206 analyzes whether the stored data satisfies a preset condition.

  The OPC server 207 has the function of an OPC server. OPC is a standard that defines communication interfaces between devices and applications in the industrial field. The OPC server 207 transmits / receives data to / from an OPC-compliant device or application via the OPC interface. The OPC interface defined in OPC includes, for example, an OPC-DA (OPC data access) interface and an OPCHDA (OPC historical data access) interface. OPC-DA is an interface for real-time communication. OPCHDA is an interface for log data access. Log data is stored in the database 204 and used using OPCHDA. For example, the OPC server 207 can switch between OPC-DA and OPCHDA depending on the analysis result of the data analysis unit 206. For example, when the rate of change of data over time is less than a predetermined numerical value in the analysis result of the data analysis unit 206, the OPC server 207 uses the OPC-DA to store untransmitted data stored in the database 204 Transmit to system 30. Also, in the analysis result of the data analysis unit 206, when the rate of change of data over time is equal to or greater than a predetermined numerical value, the OPC server 207 displays the history of data including data transmitted in the past using OPCHDA. 30 for transmission.

  The host system 30 acquires and uses the data output from the device from the data server 20. The data output by the device is stored in the data storage unit 103 as described above, and further stored in the database 204. For this reason, for example, even if the communication state of the first network 91 or the second network 92 is unstable, it has redundancy that enables reliable data transmission.

  In FIG. 1, the data collection system 1 exemplifies a case where one data collection device 10 is connected to the data server 20, but the number of data collection devices 10 connected to the data server 20 is arbitrary. is there. For example, a plurality of data collection devices may be connected to the first network 91 so that the data server 20 acquires data from the plurality of data collection devices. Each data collection device asynchronously transmits data to the data server 20 at the timing generated by each timing generation unit.

  The functions of the data collection unit 101, the time stamp addition unit 102, the data storage unit 103, the timing generation unit 104, the request information acquisition unit 105, and the data transmission unit 106 included in the data collection device 10 are as described above. Explained as being realized by. However, at least one or more of the functions of the data collection device 10 may be realized by hardware. The functions of the request information generation unit 201, request information transmission unit 202, data acquisition unit 203, database 204, server data transmission unit 205, data analysis unit 206, and OPC server 207 included in the data server 20 are as described above. Described as being realized by software. However, at least one of the functions of the data server 20 may be realized by hardware.

  In addition, any one of the functions that the data collection device 10 has may be implemented by dividing one function into a plurality of functions. Further, any two or more functions of the data collection device 10 may be integrated into one function. In addition, any one of the functions that the data server 20 has may be implemented by dividing one function into a plurality of functions. Further, any two or more functions of the data server 20 may be integrated into one function.

  Further, the data collection device 10 may be a device realized by a single housing or a system realized by a plurality of devices connected via a network or the like. For example, the data collection device 10 may be a virtual device such as a cloud service provided by a cloud computing system. The data collection device 10 may be a general-purpose computer such as a server device or a dedicated device with limited functions.

  The data server 20 may be a device realized by a single housing or a system realized by a plurality of devices connected via a network or the like. For example, the data server 20 may be a virtual device such as a cloud service provided by a cloud computing system. The data server 20 may be a general-purpose computer such as a server device or a dedicated device with limited functions.

  Further, at least one of the above functions of the data collection device 10 may be realized in another device. That is, the data collection device 10 does not have to have all the functions described above, and may have some functions. Further, at least one or more of the above functions of the data server 20 may be realized in another device. That is, the data server 20 does not have to have all the functions described above, and may have some functions.

  For example, the function of the time stamp adding unit 102 described with reference to FIG. 1 may be realized in each sensor. That is, in the data collection device 10 of the present embodiment, the function of the time stamp adding unit 102 realized in each sensor acquires time information directly from the GPS device and adds a time stamp in each sensor. Also good. The time stamp added by the sensor can be collected by the data collection unit 101 together with the data output from the sensor.

  Moreover, you may make it implement | achieve all the functions of the data collection device 10 in a sensor (the same housing as a sensor). For example, the function of the data collection device 10 may be mounted on a specific sensor among a plurality of sensors, and other sensors may be connected to the specific sensor to collect data. By realizing the function of the data collection device 10 in the same housing as the sensor, for example, the space for installing the data collection device 10 can be saved, and the excellent environmental resistance performance of the sensor housing can be achieved with respect to the data collection device 10. Can be granted.

  Next, the hardware configuration of the data collection system will be described with reference to FIG. FIG. 2 is a block diagram illustrating an example of a hardware configuration of a data collection system including the data collection device according to the embodiment. In the following description, description of the configuration of the data server 20 common to the data collection device 10 is omitted.

  The data collection device 10 includes a CPU (Central Processing Unit) 11, a RAM 12, a ROM (Read Only Memory) 13, an HDD 14, a touch panel 15, a communication I / F (Interface) 16, and a communication I / F 17.

  The data collection device 10 is a general-purpose device such as a server device, a desktop PC, or a tablet PC, or a device dedicated to data collection. The data collection device 10 executes the data collection program described with reference to FIG.

  The CPU 11 controls the data collection device 10 by executing a data collection program stored in the RAM 12, ROM 13, or HDD 14. The data collection program is acquired from, for example, a recording medium on which the data collection program is recorded, a program distribution server via a network, and the like, installed in the HDD 14, and stored in the RAM 12 so as to be readable from the CPU 11.

  The touch panel 15 has an operation display function having an operation input function and a display function. The touch panel 15 enables an operator to input an operation using a fingertip or a touch pen. The data collection device 10 in this embodiment will be described using a touch panel 15 having an operation display function. However, the data collection device 10 has a display device having a display function and an operation input device having an operation input function separately. It may be. In that case, the display screen of the touch panel 15 can be implemented as a display screen of the display apparatus, and the operation of the touch panel 15 can be implemented as an operation of the operation input apparatus. Note that the touch panel 15 may be realized in various forms such as a head mount type, a glasses type, and a wristwatch type display.

  The communication I / F 16 controls communication in the first network 91. The first network is general-purpose communication such as wireless LAN communication, wired LAN communication, infrared communication, and short-range wireless communication. The communication I / F 16 includes other data collection devices, field devices capable of general-purpose communication, a maintenance information management server that manages maintenance information, a DCS (Distributed Control System) control device, a PLC, and the like (not shown). It may be.

  The communication I / F 17 is, for example, an analog input module that controls communication with the sensor A1 and the like.

  In the data server 20, the communication I / F 26 controls communication in the first network 91. The communication I / F 27 controls communication in the second network 92.

  Next, the data collection operation of the data collection device 10 will be described with reference to FIG. FIG. 3 is a flowchart illustrating an example of a data collection operation of the data collection device according to the embodiment.

  In FIG. 3, the data collection device 10 determines whether or not the sampling period has elapsed (step S11). Whether or not the sampling period has elapsed can be executed, for example, when the data collection unit 101 determines the elapse of a predetermined period based on a timer value or the like. If it is determined that the sampling period has not elapsed (step S11: NO), the data collection device 10 repeats the process of step S11 and waits for the sampling period to elapse.

  On the other hand, when it is determined that the sampling period has elapsed (step S11: YES), the data collection device 10 collects data output by the device (step S12). Data collection can be performed, for example, when the data collection unit 101 performs AD conversion of analog data output from the device into digital data. The data collection device 10 may acquire status information indicating whether or not the device is normal together with the data.

  After executing the process of step S12, the data collection device 10 adds a time stamp to the collected data (step S13). The time stamp can be added by the time stamp adding unit 102 acquiring time information from the time server 50, for example.

  After executing the process of step S13, the data collection device 10 stores the data with the time stamp added (step S14). For example, the data can be stored by the data storage unit 103 storing the data in the HDD 14.

  After executing the process of step S14, the data collection device 10 determines whether or not to end the data sampling operation (step S15). Whether or not to end the sampling operation can be determined, for example, by the data collection device 10 detecting whether or not the operator has performed an end operation on the touch panel 15. When it is determined that the sampling operation is not terminated (step S15: NO), the data collection device 10 repeats the processes of steps S11 to S15. On the other hand, when it is determined that the sampling operation is finished (step S15: YES), the data collection device 10 finishes the operation shown in the flowchart.

  Next, the data transmission operation of the data collection device 10 will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of a data transmission operation of the data collection device according to the embodiment.

  In FIG. 4, the data collection device 10 determines whether or not a data transmission request has been acquired from the data server 20 (step S21). Whether or not a data transmission request has been acquired can be determined, for example, by whether or not the request information acquisition unit 105 has acquired request information from the data server 20. The request information is generated by the request information generation unit 201 in response to a request from the host system 30, for example, and transmitted to the data collection device 10 by the request information transmission unit 202.

  If it is determined that a transmission request has not been acquired (step S21: NO), the data collection device 10 determines whether or not the transmission timing has come (step S22). Whether the transmission timing has come can be determined, for example, based on whether the timing generation unit 104 has generated the transmission timing. For example, the timing generation unit 104 determines whether a predetermined sampling period has elapsed, or determines whether the number of stored data and the amount of data have reached a predetermined value, and generates timing. .

  When it is determined that the transmission request is acquired in the process of step S21 (step S21: YES), or when it is determined that the transmission timing is reached in the process of step S22 (step S22: YES), the data collection device 10 It is determined whether the communication status (Status) with 20 is OK (step S23). The communication state can be determined, for example, by transmitting a communication test command. When it is determined that the communication state with the data server 20 is not OK (step S23: NO), the data collection device 10 repeats the process of step S23 and waits for the communication state to become OK.

  On the other hand, when it is determined that the communication state with the data server 20 is OK (step S23: YES), the data collection device 10 transmits data to the data server 20 (step S24). The data transmission can be executed, for example, when the data transmission unit 106 transmits the data stored by the data storage unit 103.

  After performing the process of step S24, or when it is determined that the transmission timing is not reached in the process of step S22 (step S22: NO), the data collection device 10 determines whether or not to end the transmission process ( Step S25). Whether or not to end the transmission process can be determined by, for example, detecting whether or not the data collection device 10 has performed an end operation on the touch panel 15 by the operator. When it is determined that the transmission process is not finished (step S25: NO), the data collection device 10 repeats the processes of steps S21 to S25. On the other hand, when it is determined that the transmission process is to be ended (step S25: YES), the data collection device 10 ends the operation shown in the flowchart.

  The data acquisition from the data collection device 10 of the data server 20 is executed by the data acquisition unit 203 acquiring the data transmitted in the data transmission process of step S24 and storing it in the database 204.

  Next, the data transmission operation of the data server 20 will be described with reference to FIG. FIG. 5 is a flowchart illustrating an example of a data transmission operation of the data server in the embodiment.

  In FIG. 5, the data server 20 determines whether or not a data transmission request has been acquired from the host system 30 (step S31). Whether or not the data transmission request has been acquired from the host system 30 can be determined by whether or not the server data transmission unit 205 has received a predetermined command from the host system 30, for example. If it is determined that the data transmission request has not been acquired (step S31: NO), the data server 20 repeats the process of step S31 and waits for the acquisition of the data transmission request.

  If it is determined that a data transmission request has been acquired (step S31: YES), the data server 20 collects data stored in the database 204 (step S32). For example, the data collection is performed by the host system specifying the data to be collected by specifying the sensor ID or the time stamp range.

  After executing the process of step S32, the data server 20 analyzes the collected data and determines whether or not a predetermined condition is satisfied (step S33). Whether or not a predetermined condition is satisfied, for example, a range in which the data analysis unit 206 acquires data over time of a specific sensor, and the rate of change or amount of change of data within a predetermined period is set in advance It can be determined by analyzing whether or not. For example, the data analysis unit 206 may compare the trends of a plurality of sensors to identify a sensor having an abnormality in the trend change.

  If it is determined that the predetermined condition is not satisfied (step S33: NO), the data server 20 executes real-time data transmission (step S34). The transmission of real-time data can be executed, for example, by the OPC server 207 transmitting untransmitted data stored in the database 204 to the host system 30 using OPC-DA. In step S34, the data server 20 may execute another process using the OPC-DA.

  On the other hand, when it is determined that the predetermined condition is satisfied (step S33: YES), the data server 20 executes transmission of historical data (step S35). The transmission of historical data can be executed, for example, by the OPC server 207 transmitting a data history including data transmitted in the past using OPCHDA to the host system 30. In step S35, the data server 20 may execute another process using OPCHDA. In other words, in the present embodiment, the data server 20 can switch the OPCHDA and OPCHDA interfaces of the OPC server 207 based on the data stored in the database 204 and execute data transmission / reception with the host system 30.

After executing the process of step S34 or after executing the process of step S35, the data server 20 determines whether or not to end the data transmission process (step S36). Whether or not to end the transmission process can be determined by, for example, detecting whether or not the data server 20 has performed an end operation on the touch panel 25 by the operator.
If it is determined not to end the data transmission process (step S36: NO), the data server 20 repeatedly executes the processes of steps S31 to S36. On the other hand, when it is determined that the data transmission process is to be ended (step S36: YES), the data server 20 ends the operation shown in the flowchart.

  Next, data stored in the data collection device will be described with reference to FIG. FIG. 6 is a diagram illustrating an example of data stored in the data collection device according to the embodiment.

  In FIG. 6, FIG. 6 (A) shows data stored in the data storage unit 103 of the data collection device 10 described in FIG. The data item “Time Stamp” indicates time information of a time stamp added to data acquired from the sensor A1 or the sensor A2. The data item “sensor ID” indicates sensor identification information. The data item “data” indicates digital data output from the sensor or data obtained by AD conversion of an analog value output from the sensor. The data item “Status” indicates status information indicating whether or not the sensor is normal. For example, the sensor A1 and the sensor A2 have time stamps added at the times “tA-1” and “tA-2”. Here, the time of “tA-1” and “tA-2” of “Time Stamp” can be adjusted according to the processing speed of AD conversion of the data, so the time when the data was acquired and the time stamp It is possible to substantially match the time added by. That is, it is possible to add a time stamp to the collected data in real time. The status information indicates that all data has been acquired from a normally operating sensor.

FIG. 6B shows data stored in the data storage unit 103 of the second data collection apparatus 10B not shown in FIG. The data collection device 10B acquires data from the sensor B1 and the sensor B1. Here, the status information at “tB-2” of the sensor B2 is NG. That is, the data acquired at “tB-2” indicates that the data is acquired from a sensor in an abnormal status state.
For example, data with a status of NG is not used as an analysis target in the data analysis unit 206, so that the accuracy of analysis can be improved.

  It is assumed that the time of the time stamp is tA-1 is the oldest and proceeds in the order of tA-1, tB-1, tA-2, and tB-2.

  Next, data stored in the data server 20 will be described with reference to FIG. FIG. 7 is a diagram illustrating an example of data stored in the data server in the embodiment. FIG. 7 shows a state when the data stored in the data storage unit 103 shown in FIG. 6 is collected by the data server 20 and stored in the database 204.

  In FIG. 7, as described above, time information of time stamps is added to the data item “Time Stamp” in the order of tA-1, tB-1, tA-2, and tB-2. The database 204 can centrally manage data acquired from a plurality of data collection devices 10. As described above, each data collection device 10 can add accurate time information in the time stamp adding unit 102. Therefore, by centrally managing data acquired from a plurality of data collection devices 10, it is possible to use collected data for various data analysis based on time information, data, and information on sensor installation positions. It becomes. For example, when sensors measure the speed of a vehicle and speed data is collected, the speed data and time information are recorded at the position of each sensor, thereby grasping the driving situation such as the acceleration / deceleration situation of the vehicle. can do.

  Next, another example of the software configuration of the data collection system 1 will be described with reference to FIG. FIG. 8 is a block diagram illustrating another example of the software configuration of the data collection system including the data collection device according to the embodiment. In FIG. 8, the same components as those in FIG.

  In FIG. 8, the data collection device 10 is connected to a plurality of sensors C (including sensors C1, sensors C2, etc.). Each sensor C has a status buffer, a self-diagnosis function, and an advanced diagnosis function. Note that the sensor C only needs to have at least one of a self-diagnosis function and an advanced diagnosis function.

  The self-diagnosis function detects an abnormality of the sensor C itself. The abnormality of the sensor C itself is, for example, an abnormality of a built-in circuit of the sensor C, an abnormality of an internal memory of the sensor, an abnormality of communication between the sensor C and the data collection device 10, and the like. The sensor C stores the diagnosis result by the self-diagnosis function in the status buffer as the self-diagnosis result. The self-diagnosis result is provided to the data collection device 10 together with measurement data (either analog value or digital value) such as differential pressure, temperature, and flow rate stored in the status buffer. Thereby, the reliability of the measurement data provided to the data collection device 10 can be improved. The data collection device 10 can further improve the reliability of the measurement data by adding a time stamp to the acquired data and the self-diagnosis result, and perform temporal analysis on the measurement data or the self-diagnosis result. Can be easily.

  The advanced diagnostic function is a sensor C measurement environment such as detection of foreign matter adhering to the detection unit of the sensor C, blockage of a pressure guiding tube for differential pressure or flow rate measurement, fluid abnormality such as pulsating flow or bubble mixing. This is a function to detect abnormalities. The sensor C stores the diagnosis result by the advanced diagnosis function in the status buffer as the advanced diagnosis result. The advanced diagnosis result is provided to the data collection device 10 together with the measurement data stored in the status buffer. Thereby, the reliability of the measurement data provided to the data collection device 10 can be improved. The data collection device 10 can further improve the reliability of the measurement data by adding a time stamp to the acquired data and the self-diagnosis result, and perform temporal analysis on the measurement data or the self-diagnosis result. Can be easily. The advanced diagnosis function is a function for detecting data for analyzing an abnormality in the measurement environment, and the details of the analysis can be performed by the host system 30, for example.

  Next, another example of data stored in the data collection device 10 will be described with reference to FIG. FIG. 9 is a diagram illustrating another example of data stored in the data collection device according to the embodiment.

  FIG. 9 shows data stored in the data storage unit 103 of the data collection device 10. The data item “Time Stamp”, the data item “sensor ID”, and the data item “data” are the same as the data items described with reference to FIG. The data item of “self-diagnosis result” is a diagnosis result diagnosed by the self-diagnosis function of the sensor C. The data item “advanced diagnosis result” is a diagnosis result diagnosed by the advanced diagnosis function of the sensor C. The “self-diagnosis result” and “advanced diagnosis result” are recorded together with the measurement data recorded in the data item “data”, and a time stamp is added. For example, at the time “tC-1”, both the self-diagnosis result and the advanced diagnosis result are recorded. That is, the data collection device 10 adds a time stamp to the measurement data, the self-diagnosis result, and the advanced diagnosis result. Further, the self-diagnosis result is recorded at the time “tC-2”. That is, the data collection device 10 adds a time stamp to the measurement data and the self-diagnosis result. Further, at the time “tC-3”, an advanced diagnosis result is recorded. That is, the data collection device 10 adds a time stamp to the measurement data and the advanced diagnosis result. In addition, at the time “tC-4”, neither the self-diagnosis result nor the advanced diagnosis result is recorded. That is, the data collection device 10 can arbitrarily store the self-diagnosis result and the advanced diagnosis result together with the measurement data and add a time stamp.

  Next, a data collection system including a plurality of data collection devices 10 will be described with reference to FIG. FIG. 10 is a block diagram illustrating an example of a data collection system including a plurality of data collection devices according to the embodiment.

  In FIG. 10, a system 1000 includes, for example, a data collection device 10, a sensor group (sensor C1, sensor C2, etc.), a time server 50, and a GPS device 51. The data server 20 is connected to a system 2000 and a system 3000 similar to the system 1000 via the network 91. That is, the data server 20 collects data with a time stamp added from the system 1000 to the system 3000. As a result, for example, even when the system 1000 to the system 3000 are geographically separated and a time lag occurs in communication, it is possible to collect and record data by time stamps centrally. Become. The network 91 may be a wired network or a wireless network.

  As described above, the data collection device according to the present embodiment includes a data collection unit that collects data from a device that outputs data, a time stamp addition unit that adds a time stamp to the collected data, and a time stamp. A data storage unit that stores the stored data, a timing generation unit that generates a timing for transmitting the stored data to a data server that is communicably connected via the first network, and a transmission from the data server A request information acquisition unit that acquires request information for requesting data transmission, and transmits the stored data to the data server based on the generated timing and according to the acquired request information A data transmission unit. This configuration enables stable analysis based on the time stamp of data acquired from the data input device.

  Note that the data collection device described above may be a device having the above-described functions. For example, the data collection device may be realized by a system configured by combining a plurality of devices and communicatively connecting each device. Good. Further, the data collection device may be realized as a part of the function of another device connected via a network.

  The steps in the data collection method or the processes in the data collection program and the recording medium described in the present embodiment do not limit the execution order.

  Further, a program for realizing the functions constituting the apparatus described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. Thus, the various processes described above in the present embodiment may be performed. Here, the “computer system” may include an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used. The “computer-readable recording medium” means a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a CD-ROM, a hard disk built in a computer system, etc. This is a storage device.

  Further, the “computer-readable recording medium” refers to a volatile memory (for example, DRAM (Dynamic) in a computer system serving as a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Random Access Memory)) that holds a program for a certain period of time is also included. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what implement | achieves the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  The embodiment of the present invention has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes various modifications within the scope of the present invention. It is.

DESCRIPTION OF SYMBOLS 10 Data collection device 101 Data collection part 102 Time stamp addition part 103 Data storage part 104 Timing generation part 105 Request information acquisition part 106 Data transmission part 20 Data server 201 Request information generation part 202 Request information transmission part 203 Data acquisition part 204 Database 205 Server data transmission unit 206 Data analysis unit 207 OPC server 30 Host system 50 Time server 51 GPS device 91 First network 92 Second network 11 CPU
12 RAM
13 ROM
14 HDD
15 Touch panel 16 Communication I / F
17 Communication I / F

Claims (16)

A data collection unit that collects the data from a device that outputs data;
A time stamp adding unit for adding a time stamp to the collected data;
A data storage unit for storing the data with the time stamp added thereto;
A timing generation unit that generates timing for transmitting the stored data to a data server that is communicably connected via the first network;
A request information obtaining unit for obtaining request information for requesting transmission of the data, transmitted from the data server;
A data collection device comprising: a data transmission unit configured to transmit the data stored to the data server based on the generated timing and according to the acquired request information.   The request information acquisition unit acquires the request information transmitted from the data server in response to a request from a host system communicably connected to the data server via a second network. The data collection device described in 1.   The data collection device according to claim 1, wherein the time stamp adding unit adds the time stamp based on a time obtained from GPS information. The data collection unit collects the status information of the device together with the data,
The data collection device according to any one of claims 1 to 3, wherein the data transmission unit transmits the status information together with the data.   The data collection device according to claim 4, wherein the data collection unit collects, as the status information, a self-diagnosis result obtained by diagnosing whether or not the device is abnormal in the device.   The data collection device according to claim 4, wherein the data collection unit collects, as the status information, an advanced diagnosis result obtained by diagnosing the measurement environment of the device in the device.   The data collection device according to any one of claims 4 to 6, wherein the data transmission unit further transmits an alarm issued from the device when the device is not normal. The first network includes a wireless communication path;
The data collection device according to any one of claims 1 to 7, wherein the data transmission unit transmits the data to the data server via wireless communication.   A data collection system comprising the data collection device according to claim 1 and the data server. The data server is
A request information generating unit that generates the request information in response to a request from a host system;
A request information transmission unit that transmits the generated request information to the data collection device via the first network;
A data acquisition unit for acquiring the data transmitted from the data collection device;
A database for storing the acquired data;
The data collection system according to claim 9, further comprising: a server data transmission unit that transmits the data stored in the database to the host system. The data server is
A data analysis unit for analyzing whether or not the data stored in the database satisfies a predetermined condition;
The server data transmission unit
When it is analyzed that the predetermined condition is not satisfied, the unsent data is transmitted,
The data collection system according to claim 10, wherein when it is analyzed that the predetermined condition is satisfied, the untransmitted data and the previously transmitted data are transmitted together.   The data collection system according to claim 10 or 11, wherein the data acquisition unit acquires the data from a plurality of the data collection devices. In response to a request from a host system that is communicably connected via the second network, data of a device that outputs data to a data collection device that is communicably connected via the first network. A request information generator for generating request information for requesting transmission;
A request information transmission unit for transmitting the generated request information to the data collection device;
A data acquisition unit that acquires the data transmitted from the data collection device based on the timing generated in the data collection device and according to the request information;
A database for storing the acquired data;
A data server comprising: a server data transmission unit configured to transmit the data stored in the database to the host system via the second network. A data collection step of collecting the data from a device that outputs the data;
A time stamp adding step of adding a time stamp to the collected data;
A data storage step for storing the data with the time stamp added thereto;
A timing generation step of generating a timing for transmitting the stored data to a data server that is communicably connected via the first network;
A request information obtaining step for obtaining request information for requesting transmission of the data, transmitted from the data server;
A data collection method comprising: a data transmission step of transmitting the stored data to the data server based on the generated timing and according to the acquired request information. A data collection process for collecting the data from the device that outputs the data;
A time stamp addition process for adding a time stamp to the collected data;
A data storage process for storing the data with the time stamp added thereto;
A timing generation process for generating a timing for transmitting the stored data to a data server communicably connected via the first network;
Request information acquisition processing for acquiring request information for requesting transmission of the data transmitted from the data server;
A data collection program for causing a computer to execute data transmission processing for transmitting the stored data to the data server based on the generated timing and in response to the acquired request information. A data collection process for collecting the data from the device that outputs the data;
A time stamp addition process for adding a time stamp to the collected data;
A data storage process for storing the data with the time stamp added thereto;
A timing generation process for generating a timing for transmitting the stored data to a data server communicably connected via the first network;
Request information acquisition processing for acquiring request information for requesting transmission of the data transmitted from the data server;
A record that records a data collection program that causes a computer to execute data transmission processing that transmits the data stored to the data server based on the generated timing and in response to the acquired request information Medium.

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