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WO2018138809A1 - Système de collecte de données, appareil de collecte de données, appareil de transmission de données, et procédé de collecte de données - Google Patents

Système de collecte de données, appareil de collecte de données, appareil de transmission de données, et procédé de collecte de données Download PDF

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Publication number
WO2018138809A1
WO2018138809A1 PCT/JP2017/002585 JP2017002585W WO2018138809A1 WO 2018138809 A1 WO2018138809 A1 WO 2018138809A1 JP 2017002585 W JP2017002585 W JP 2017002585W WO 2018138809 A1 WO2018138809 A1 WO 2018138809A1
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WO
WIPO (PCT)
Prior art keywords
data
transmission
data collection
collection device
data transmission
Prior art date
Application number
PCT/JP2017/002585
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English (en)
Japanese (ja)
Inventor
森田　浩司
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三菱電機株式会社
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018501388A priority Critical patent/JPWO2018138809A1/ja
Priority to PCT/JP2017/002585 priority patent/WO2018138809A1/fr
Publication of WO2018138809A1 publication Critical patent/WO2018138809A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Definitions

  • the present invention relates to a data collection system, a data collection device, a data transmission device, and a data collection method for collecting data.
  • a server collects data by receiving data transmitted from a plurality of sensors. Since the data collected by the server is enormous, communication traffic between the server and a plurality of sensors tends to increase. Therefore, in general, a technique called a polling method is used in which a data request signal is transmitted each time a host device needs data, and a lower device returns a response to the host device.
  • a technique called a polling method is used in which a data request signal is transmitted each time a host device needs data, and a lower device returns a response to the host device.
  • the sensor transmits the number of retries to the server, and the server responds to a sensor having a high frequency of transmission failures.
  • a technique for collecting data more uniformly from a plurality of sensors by setting a relatively small transmission interval and setting a relatively large transmission interval for a sensor with a low frequency of transmission failure. .
  • the present invention has been made in view of the above, and an object thereof is to obtain a data collection system capable of collecting data with optimal communication traffic.
  • the data collection system of the present invention includes a data collection device for transmitting a data transmission request including a transmission frequency and a transmission duration time for transmitting data to the data transmission device, and data A transmission device, wherein the data transmission device transmits data at a transmission frequency and a transmission frequency.
  • the data collection system according to the present invention has an effect that data can be collected with optimum communication traffic.
  • Diagram showing a configuration example of a data collection system Flowchart showing operation of data collection device collecting data from data transmission device in data collection system
  • the figure which shows the communication content between the data collection device and data transmission device in a data collection system Flow chart showing operation of data collection device
  • Flow chart showing operation of data transmission device The figure which shows the example in the case of comprising a data reception control part using CPU and memory.
  • FIG. 1 is a diagram illustrating a configuration example of a data collection system 3 according to an embodiment of the present invention.
  • the data collection system 3 includes a data collection device 1 and a data transmission device 2.
  • the data transmission device 2 is, for example, a sensor that measures a measurement target such as equipment or equipment, such as a temperature sensor, a humidity sensor, or a pressure sensor.
  • the content of data transmitted from the data transmission device 2 differs depending on the type of the data transmission device 2.
  • the data transmission device 2 may be a FA (Factory Automation) device that has a sensor function and a communication function and is used for automatic control of industrial equipment.
  • the data transmission device 2 has a communication function and may not have a sensor function.
  • the data transmission device 2 transmits data obtained from a sensor or a device different from the sensor.
  • the data collection device 1 is, for example, a server that collects data from the data transmission device 2.
  • the data collection device 1 is a device that executes a host application for the data transmission device 2.
  • the data collection device 1 can collect data from a plurality of data transmission devices 2, but the exchange between the data collection device 1 and each data transmission device 2 is the same. As an example, a case where there is one data transmission device 2 will be described.
  • the data collection device 1 includes a data reception control unit 11 and a transmission / reception unit 12.
  • the data reception control unit 11 is a transmission condition indicating a transmission frequency indicating a timing at which the data transmission device 2 transmits data, and a transmission duration time indicating a period during which the data transmission device 2 continuously transmits data at the transmission frequency described above.
  • the transmission frequency is, for example, a cycle in which the data transmission device 2 transmits data, or one or more times at which the data transmission device 2 transmits data.
  • the transmission frequency may be the number of times when the transmission cycle is fixed.
  • the transmission frequency at which the data transmission device 2 transmits data may be a constant cycle or irregular.
  • the transmission continuation time is a period from when the data transmission device 2 starts transmitting data at the above-described transmission frequency until it stops transmitting data.
  • the data transmission device 2 transmits data at the transmission frequency described above in a period between the transmission start time at which data transmission is started and the transmission stop time obtained by adding the transmission duration to the transmission start time.
  • the transmission / reception unit 12 transmits the data transmission request generated in the data reception control unit 11 to the target data transmission device 2 that transmits data. Further, the transmission / reception unit 12 receives data transmitted from the data transmission device 2 based on the above-described transmission conditions, that is, collects data.
  • FIG. 1 shows a configuration related to the function of collecting data from the data transmission device 2 with respect to the data collection device 1, and other configurations such as a storage unit for storing collected data are omitted. ing.
  • the data transmission device 2 includes a data transmission control unit 21 and a transmission / reception unit 22.
  • the transmission / reception unit 22 receives a data transmission request from the data collection device 1.
  • the transmission / reception unit 22 transmits data to the data collection device 1.
  • the data transmission control unit 21 controls the timing and period during which the transmission / reception unit 22 transmits data, based on the transmission conditions included in the data transmission request. Specifically, the data transmission control unit 21 controls the timing at which the transmission / reception unit 22 transmits data based on the transmission frequency among the transmission conditions, and the transmission / reception unit 22 transmits data based on the transmission duration of the transmission conditions. To control the period.
  • FIG. 1 shows a configuration related to the function of transmitting data to the data collection device 1 for the data transmission device 2, and other configurations, for example, a measurement unit that performs measurement, and a measurement value measured by the measurement unit.
  • the storage unit for storing the data is omitted.
  • FIG. 2 is a flowchart showing an operation in which the data collection device 1 collects data from the data transmission device 2 in the data collection system 3 according to the present embodiment.
  • FIG. 3 is a diagram showing communication contents between the data collection device 1 and the data transmission device 2 in the data collection system 3 according to the present embodiment.
  • the data collection device 1 transmits a data transmission request including a transmission condition to the data transmission device 2 (step S1). In FIG. 3, this corresponds to S101. Specifically, in the data collection device 1, the data reception control unit 11 generates a data transmission request. The transmission / reception unit 12 transmits the data transmission request generated by the data reception control unit 11 to the data transmission device 2.
  • the data transmission device 2 When receiving the data transmission request from the data collection device 1, the data transmission device 2 transmits data to the data collection device 1 based on the transmission conditions included in the data transmission request (step S2).
  • FIG. 3 corresponds to S102 to S105.
  • the transmission / reception unit 22 receives a data transmission request from the data collection device 1 and passes the received data transmission request to the data transmission control unit 21.
  • the data transmission control unit 21 controls the timing and period during which the transmission / reception unit 22 transmits data based on the transmission conditions included in the data transmission request, specifically, the transmission frequency and the transmission duration time.
  • the data transmission control unit 21 records a transmission start time that is a time when the transmission / reception unit 22 first transmits data to the data collection device 1. Further, the data transmission control unit 21 calculates a transmission stop time obtained by adding the transmission continuation time to the transmission start time. The data transmission control unit 21 determines whether the current time exceeds the transmission stop time after the transmission start time. If the transmission stop time has not been exceeded, the data transmission control unit 21 controls the transmission / reception unit 22 to transmit data to the data collection device 1 according to the transmission frequency. When the transmission stop time is exceeded, the data transmission control unit 21 performs control to stop transmission of data from the transmission / reception unit 22 to the data collection device 1.
  • FIG. 3 corresponds to S106.
  • the data collection device 1 collects data transmitted from the data transmission device 2 according to the transmission frequency and transmission duration specified in the transmission conditions (step S3).
  • FIG. 3 corresponds to S102 to S105.
  • the transmission / reception unit 12 collects data transmitted from the data transmission device 2
  • the transmission / reception unit 12 performs processing such as storing the collected data in a storage unit (not shown).
  • the data collection device 1 transmits a data transmission request including a data transmission condition to the data transmission device 2.
  • the data transmission device 2 transmits data at the transmission frequency and transmission duration specified by the transmission conditions included in the data transmission request received from the data collection device 1.
  • the data collection device 1 may transmit a data transmission request to the data transmission device 2 once before starting data collection, and communication for stopping the data transmission is not necessary. As a result, the data collection device 1 can efficiently collect data in a necessary period while suppressing communication traffic.
  • the data reception control unit 11 determines the data transmission frequency of the data transmission device 2, and therefore, when data cannot be received at the timing specified by the transmission frequency, data collection is performed. It can be determined that a communication error has occurred between the device 1 and the data transmission device 2.
  • the data reception control unit 11 records a reception start time that is a time when data is first received from the data transmission device 2 after the transmission / reception unit 12 transmits a data transmission request.
  • the transmission / reception unit 12 cannot receive the next data from the data transmission device 2 at the timing after the period specified by the transmission frequency from the reception start time, the data reception control unit 11 and the data transmission device 1 2 determines that a communication error has occurred.
  • the data reception control unit 11 It is determined that a communication error has occurred between 1 and the data transmission device 2.
  • the data collection device 1 may notify the user of the communication error using a display unit (not shown in FIG. 1).
  • the transmission / reception unit 12 can receive the next data from the data transmission device 2 at a timing after the elapse of a period specified by the transmission frequency from the reception start time, the data reception control unit 11 and the data collection device 1 It is determined that no communication error has occurred with the device 2. Similarly, when the transmission / reception unit 12 can receive the next data from the data transmission device 2 at the timing after the elapse of the period specified by the transmission frequency from the previous data reception time, the data reception control unit 11 It is determined that no communication error has occurred between the data transmission apparatus 2 and the data transmission apparatus 2.
  • the data collection device 1 may use a delay time that is allowable for the transmission frequency described above as a margin in order to determine a communication error. Further, since the transmission frequency may be changed as will be described later, the data collection device 1 provides 5 ⁇ 0.5 seconds with a margin before and after when the transmission frequency is a period, for example, every 5 seconds. If data can be received within the range, it may be determined that the communication is normal.
  • the data reception control unit 11 records the reception start time and determines the data transmission duration of the data transmission device 2. When data cannot be received within the period specified by the transmission duration, it can be determined that a communication error has occurred between the data collection device 1 and the data transmission device 2. Since the transmission continuation time may be changed as will be described later, for example, when the transmission continuation time is 30 minutes, the data collection device 1 provides data in a period of 30 minutes ⁇ 5 seconds with a margin before and after. If it can be received, it may be determined that the communication is normal.
  • the data reception control unit 11 changes either or both of the transmission frequency and the transmission duration specified by the transmission condition with respect to the data transmission device 2 that is continuing to transmit data. Is also possible. In this case, the data reception control unit 11 generates a new data transmission request including a transmission condition with a content that changes either or both of the transmission frequency and the transmission duration time.
  • the transmission / reception unit 12 transmits a new data transmission request generated by the data reception control unit 11 to the data transmission device 2.
  • the transmission condition included in the first data transmission request is reset, and the newly received data transmission request The data is transmitted based on the transmission condition included in.
  • the data collection device 1 can reduce the transmission frequency or shorten the transmission duration when the data can be sufficiently received from the desired data transmission device 2.
  • the data collection device 1 can increase the transmission frequency or lengthen the transmission continuation time when the data cannot be sufficiently received from the desired data transmission device 2.
  • the data collection device 1 can collect data at a data update interval necessary for an application of the device itself. For example, the data collection device 1 sets the transmission frequency once every second when the necessary data is the current value of the device, and once every hour when the necessary data is the power amount of the device. And The data collection device 1 accepts an operation from a user confirming the monitoring screen and changes the transmission frequency. Further, the data collection device 1 can also change the transmission duration time in response to an operation from the user.
  • the data collection device 1 can change the range of the data collection period displayed on the monitoring screen according to a user request.
  • the data collection device 1 may include a display unit that displays the monitoring screen, or the data collection device 1 may display the monitoring screen on an external display device. Good.
  • the data transmission device 2 when the data reception control unit 11 has changed the transmission condition for the data transmission device 2, the data transmission device 2 has transmitted data based on the transmission condition before the change. May determine that a communication error has occurred between the data collection device 1 and the data transmission device 2. In this case, the data reception control unit 11 determines that the data transmission device 2 has not received a data transmission request for changing the transmission condition. Further, in the data collection device 1, the data reception control unit 11, if the data collection device 1 cannot receive data from the data transmission device 2 even after a specified time has elapsed since the data transmission request was transmitted to the data transmission device 2. 1 and the data transmission device 2 may determine that a communication error has occurred.
  • the data reception control unit 11 receives the data from the data transmission device 2 even after the reception end time obtained by adding the transmission continuation time to the reception start time described above. It may be determined that a communication error has occurred, assuming that a large delay has occurred with the data transmission device 2.
  • FIG. 4 is a flowchart showing the operation of the data collection device 1 according to the present embodiment.
  • the data reception control unit 11 generates a data transmission request for the data transmission device 2, and transmits the data transmission request from the transmission / reception unit 12 to the data transmission device 2 (step S11).
  • the data reception control unit 11 confirms whether or not the transmission / reception unit 12 has received data from the data transmission device 2 within a specified time after transmitting the data transmission request (step S12). This is to avoid a situation in which the data collection device 1 cannot receive data from the data transmission device 2 and continues to wait for data transmission despite the transmission of the data transmission request.
  • the transmission / reception unit 12 when the transmission / reception unit 12 receives data from the data transmission device 2 within a specified time after transmitting the data transmission request (step S12: Yes), the transmission / reception unit 12 first transmits data.
  • the reception start time that is the time at which is received is recorded (step S13). Further, the data reception control unit 11 calculates the reception end time by adding the transmission continuation time to the reception start time (step S14).
  • step S15 When there is no change in the transmission condition included in the data transmission request generated in step S11 (step S15: No), the data reception control unit 11 performs data transmission device 2 at the transmission frequency specified by the transmission condition in the transmission / reception unit 12. It is confirmed whether data has been received from (step S16).
  • the data reception control unit 11 receives data from the data transmission device 2 at the transmission frequency specified by the transmission condition in the transmission / reception unit 12 (step S16: Yes) and does not exceed the reception end time (step S17: Yes), it is determined that the data has been normally received (step S18). Thereafter, the data collection device 1 returns to step S15 and repeatedly performs the same processing.
  • step S12 When the data reception control unit 11 cannot receive data from the data transmission device 2 within a specified time after the transmission / reception unit 12 transmits a data transmission request (step S12: No), the data reception control unit 11 and the data collection device 1 It is determined that a communication error has occurred with the transmitter 2 (step S19), a display indicating that a communication error has occurred is displayed to the user (step S20), and the operation is terminated.
  • step S15 When there is a change in the transmission condition included in the data transmission request generated in step S11 (step S15: Yes), the data reception control unit 11 resets the current transmission condition, the reception start time, and the reception end time (step S21), returning to step S11, a data transmission request is generated with the contents of the changed transmission condition. Subsequent operations are as described above.
  • step S16 If the transmission / reception unit 12 cannot receive data from the data transmission device 2 at the transmission frequency specified in the transmission condition (step S16: No), the data reception control unit 11 determines whether the reception end time has not been exceeded. Is confirmed (step S22). If the reception end time has not been exceeded (step S22: Yes), the data reception control unit 11 determines that a communication error has occurred between the data collection device 1 and the data transmission device 2 (step S19), and prompts the user. On the other hand, a display indicating that a communication error has occurred is performed (step S20), and the operation is terminated. When the reception end time has been exceeded (step S22: No), the data reception control unit 11 determines that the data transmission from the data transmission device 2 has ended normally (step S23), and ends the operation.
  • the data reception control unit 11 receives data from the data transmission device 2 at the transmission frequency specified by the transmission condition in the transmission / reception unit 12 (step S16: Yes), but exceeds the reception end time (step S17: No), it is determined that a communication error has occurred between the data collection device 1 and the data transmission device 2 (step S19), and a display indicating that the communication error has occurred is displayed to the user (step S20). End the operation.
  • FIG. 5 is a flowchart showing the operation of the data transmission device 2 according to the present embodiment.
  • the data transmission control unit 21 controls the transmission / reception unit 22 based on the transmission condition included in the data transmission request, and the transmission / reception unit 22 transmits data to the data collection device 1 (step S32).
  • the data transmission control unit 21 records a transmission start time that is a time when the transmission / reception unit 22 first transmits data (step S33). Further, the data transmission control unit 21 calculates the transmission stop time by adding the transmission continuation time to the transmission start time (step S34).
  • step S35 If the transmission / reception unit 22 has not received a new data transmission request (step S35: No), the data transmission control unit 21 has a transmission timing specified by the transmission frequency (step S36: Yes), and the transmission stop time. If not exceeding (step S37: Yes), the transmitting / receiving unit 22 is controlled to transmit data from the transmitting / receiving unit 22 to the data collection device 1 (step S38). Thereafter, the data transmitting apparatus 2 returns to step S35 and repeatedly performs the same processing.
  • step S35 When the transmission / reception unit 22 newly receives a data transmission request (step S35: Yes), the data transmission control unit 21 resets the current transmission condition, transmission start time, and transmission stop time (step S39), and step S32 Returning to FIG. 2, the transmission / reception unit 22 is controlled based on the transmission condition included in the new data transmission request, and the transmission / reception unit 22 transmits data to the data collection device 1 (step S32).
  • step S36 If the transmission timing specified by the transmission frequency is not reached (step S36: No), the data transmission control unit 21 waits until the transmission timing specified by the transmission frequency is reached. If the transmission stop time has been exceeded (step S37: No), the data transmission control unit 21 terminates the operation without transmitting data, assuming that the transmission of data based on the transmission condition has ended (step S40).
  • the transmission / reception unit 12 is realized by an interface circuit capable of wireless communication with the data transmission device 2.
  • the data reception control unit 11 is realized by a processing circuit. That is, the data reception control unit 11 includes a processing circuit for generating a data transmission request and determining a communication error.
  • the processing circuit may be dedicated hardware, a CPU (Central Processing Unit) that executes a program stored in the memory, and a memory.
  • FIG. 6 is a diagram illustrating an example in which the data reception control unit 11 according to the present embodiment is configured using a CPU and a memory.
  • the aforementioned interface circuit is the interface circuit 91 of FIG.
  • the processing circuit includes the CPU 92 and the memory 93
  • the function of the data reception control unit 11 is realized by software, firmware, or a combination of software and firmware.
  • Software or firmware is described as a program and stored in the memory 93.
  • the CPU 92 reads out and executes the program stored in the memory 93, thereby realizing the function of each unit.
  • the data reception control unit 11 stores a program 93 for storing a program that, when executed by the processing circuit, results in a step of generating a data transmission request and a step of determining a communication error.
  • These programs can also be said to cause a computer to execute the procedure and method of the data reception control unit 11.
  • the CPU 92 may be a processing device, an arithmetic device, a microprocessor, a microcomputer, a processor, or a DSP (Digital Signal Processor).
  • the memory 93 is, for example, non-volatile or volatile, such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM).
  • RAM Random Access Memory
  • ROM Read Only Memory
  • flash memory EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM).
  • EPROM Erasable Programmable ROM
  • EEPROM registered trademark
  • semiconductor memory magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), and the like are applicable.
  • FIG. 7 is a diagram illustrating an example in which the data reception control unit 11 according to the present embodiment is configured using dedicated hardware.
  • the processing circuit is dedicated hardware
  • the processing circuit 94 shown in FIG. 7 includes, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), and an FPGA (FPGA). Field Programmable Gate Array) or a combination of these.
  • Each function of the data reception control unit 11 may be realized by the processing circuit 94 for each function, or each function may be realized by the processing circuit 94 collectively.
  • each function of the data reception control unit 11 may be realized by dedicated hardware, and a part may be realized by software or firmware.
  • the processing circuit can realize the above-described functions by dedicated hardware, software, firmware, or a combination thereof.
  • the hardware configuration of the data collection device 1 has been described, the hardware configuration of the data transmission device 2 can also be realized by the configuration shown in FIG. 6 or FIG.
  • the data collection device 1 transmits a data transmission request including a data transmission condition to the data transmission device 2, and the data transmission device 2 transmits the data collection device 1.
  • the data is transmitted at the transmission frequency and the transmission duration specified by the transmission condition included in the data transmission request received from the terminal.
  • the data collection device 1 only needs to transmit a data transmission request once to the data transmission device 2, and therefore collects data from the desired data transmission device 2 while suppressing communication traffic. Can do.
  • the data collection device 1 can specify transmission conditions for the data transmission device 2 in accordance with the type of the data transmission device 2 or the use of the data transmission device 2, it is possible to avoid generation of useless communication traffic. .
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
  • 1 data collection device 1 data collection device, 2 data transmission device, 3 data collection system, 11 data reception control unit, 12, 22 transmission / reception unit, 21 data transmission control unit.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Communication Control (AREA)

Abstract

L'invention concerne un système de collecte de données (3) comprenant un appareil de collecte de données (1), et un appareil de transmission de données (2). L'appareil de collecte de données (1) transmet à l'appareil de transmission de données (2) une demande de transmission de données contenant une fréquence de transmission et une durée de transmission relatives à la transmission de données, l'appareil de transmission de données (2) transmettant des données à la fréquence de transmission pendant la durée de transmission.
PCT/JP2017/002585 2017-01-25 2017-01-25 Système de collecte de données, appareil de collecte de données, appareil de transmission de données, et procédé de collecte de données WO2018138809A1 (fr)

Priority Applications (2)

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JP2018501388A JPWO2018138809A1 (ja) 2017-01-25 2017-01-25 データ収集システム、データ収集装置、データ送信装置およびデータ収集方法
PCT/JP2017/002585 WO2018138809A1 (fr) 2017-01-25 2017-01-25 Système de collecte de données, appareil de collecte de données, appareil de transmission de données, et procédé de collecte de données

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PCT/JP2017/002585 WO2018138809A1 (fr) 2017-01-25 2017-01-25 Système de collecte de données, appareil de collecte de données, appareil de transmission de données, et procédé de collecte de données

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JP2008072700A (ja) * 2006-08-18 2008-03-27 Hitachi Communication Technologies Ltd 無線基地局、無線端末および無線通信システムにおける通信制御方法
WO2011099162A1 (fr) * 2010-02-15 2011-08-18 株式会社日立製作所 Système de réseau et station de base
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