WO2018138809A1 - Data collection system, data collection apparatus, data transmission apparatus and data collection method - Google Patents

Data collection system, data collection apparatus, data transmission apparatus and data collection method 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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Prior art keywords
data
transmission
data collection
collection device
data transmission
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PCT/JP2017/002585
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French (fr)
Japanese (ja)
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森田　浩司
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三菱電機株式会社
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Priority to PCT/JP2017/002585 priority Critical patent/WO2018138809A1/en
Priority to JP2018501388A priority patent/JPWO2018138809A1/en
Publication of WO2018138809A1 publication Critical patent/WO2018138809A1/en

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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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Abstract

A data collection system (3) comprises a data collection apparatus (1) and a data transmission apparatus (2), the data collection apparatus (1) transmitting to the data transmission apparatus (2) a data transmission request including a transmission frequency and a transmission duration for transmitting data, wherein the data transmission apparatus (2) transmits data at the transmission frequency for a period of the transmission duration.

Description

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Data collection system, data collection device, data transmission device, and data collection method
　本発明は、データを収集する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に関する。 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.
　従来、サーバが、複数のセンサから送信されたデータを受信することによって、データを収集する技術がある。サーバが収集するデータは膨大なため、サーバと複数のセンサ間の通信トラフィックは高くなる傾向がある。そこで、一般的には、上位機器がデータを必要とする度に、データ要求信号を送信し、それに対して下位機器が上位機器に応答を返すポーリング方式と呼ばれる技術が用いられる。また、例えば特許文献１には、下位機器から送信されたデータを上位機器で取りこぼさないようにするため、センサはサーバにリトライ回数を送信し、サーバが、送信失敗の頻度が高いセンサに対して相対的に小さい送信間隔を設定し、送信失敗の頻度が低いセンサに対して相対的に大きい送信間隔を設定することによって、複数のセンサからより均一にデータを収集する技術が開示されている。 Conventionally, there is a technique in which 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. For example, in Patent Document 1, in order to prevent data transmitted from a lower device from being missed by a higher 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. .
特開２０１２－１６０９６５号公報JP 2012-160965 A
　しかしながら、従来のポーリング方式によれば、上位機器が連続してデータをモニタリングしたい場合、下位機器へのデータ要求信号を連続して送信する必要があり、通信トラフィックが増大するという問題があった。また、特許文献１の技術によれば、送信失敗の頻度が低いセンサに関しては、相対的に長い送信間隔でデータを送信できるものの、サーバで情報を収集する必要がなくなっても、下位機器はサーバから指示された時間間隔でデータを送信し続ける。したがって、必要以上にデータ送信が発生しトラフィックが増大するという問題があった。 However, according to the conventional polling method, when the host device wants to continuously monitor data, it is necessary to continuously transmit a data request signal to the lower device, resulting in an increase in communication traffic. Further, according to the technique of Patent Document 1, regarding a sensor with a low frequency of transmission failure, data can be transmitted at a relatively long transmission interval. Continue to send data at the time interval specified by. Therefore, there is a problem that data transmission occurs more than necessary and traffic increases.
　本発明は、上記に鑑みてなされたものであって、最適な通信トラフィックで、データを収集可能なデータ収集システムを得ることを目的とする。 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.
　上述した課題を解決し、目的を達成するために、本発明のデータ収集システムは、データを送信する送信頻度および送信継続時間を含むデータ送信要求をデータ送信装置に送信するデータ収集装置と、データ送信装置と、を備え、データ送信装置は送信継続時間の期間、送信頻度でデータを送信する、ことを特徴とする。 In order to solve the above-described problems and achieve the object, 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.
　本発明にかかるデータ収集システムは、最適な通信トラフィックで、データを収集できる、という効果を奏する。 The data collection system according to the present invention has an effect that data can be collected with optimum communication traffic.
データ収集システムの構成例を示す図Diagram showing a configuration example of a data collection system データ収集システムにおいてデータ収集装置がデータ送信装置からデータを収集する動作を示すフローチャートFlowchart showing operation of data collection device collecting data from data transmission device in data collection system データ収集システムにおけるデータ収集装置とデータ送信装置との間の通信内容を示す図The figure which shows the communication content between the data collection device and data transmission device in a data collection system データ収集装置の動作を示すフローチャートFlow chart showing operation of data collection device データ送信装置の動作を示すフローチャートFlow chart showing operation of data transmission device データ受信制御部をＣＰＵおよびメモリを用いて構成する場合の例を示す図The figure which shows the example in the case of comprising a data reception control part using CPU and memory. データ受信制御部を専用のハードウェアを用いて構成する場合の例を示す図The figure which shows the example in the case of comprising a data reception control part using exclusive hardware
　以下に、本発明の実施の形態にかかる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を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, a data collection system, a data collection device, a data transmission device, and a data collection method according to embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態．
　図１は、本発明の実施の形態にかかるデータ収集システム３の構成例を示す図である。データ収集システム３は、データ収集装置１と、データ送信装置２と、を備える。データ送信装置２は、例えば、設備または機器などの計測対象を計測するセンサであり、温度センサ、湿度センサ、圧力センサなどである。データ送信装置２の種類によって、データ送信装置２から送信されるデータの内容は異なることになる。データ送信装置２は、センサ機能および通信機能を有し、産業用機器の自動制御に使用されるＦＡ（Factory　Automation）機器であってもよい。なお、データ送信装置２は、通信機能を有し、センサ機能を有さなくてもよい。この場合、データ送信装置２は、センサ、またはセンサとは異なる機器から得られたデータを送信する。データ収集装置１は、例えば、データ送信装置２からデータを収集するサーバである。データ収集装置１は、データ送信装置２に対する上位アプリケーションを実行する装置である。なお、データ収集システム３では、データ収集装置１は複数のデータ送信装置２からデータを収集することが可能であるが、データ収集装置１と各データ送信装置２との間のやりとりは同様のため、ここでは一例として、データ送信装置２が１つの場合について説明する。 Embodiment.
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. In this case, 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. In the data collection system 3, 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.
　データ収集装置１は、データ受信制御部１１と、送受信部１２と、を備える。 The data collection device 1 includes a data reception control unit 11 and a transmission / reception unit 12.
　データ受信制御部１１は、データ送信装置２がデータを送信するタイミングを示す送信頻度、およびデータ送信装置２が前述の送信頻度でデータを継続して送信する期間を示す送信継続時間である送信条件を含むデータ送信要求を生成する。送信頻度は、例えば、データ送信装置２がデータを送信する周期、またはデータ送信装置２がデータを送信する１以上の時刻である。送信頻度は、送信する周期が固定の場合は回数であってもよい。データ送信装置２がデータを送信する送信頻度については、一定の周期であってもよいし、不定期であってもよい。送信継続時間は、データ送信装置２が前述の送信頻度でデータの送信を開始してからデータの送信を停止するまでの期間である。データ送信装置２は、データの送信を開始した送信開始時刻から、送信開始時刻に送信継続時間を加算した送信停止時刻の間の期間において、前述の送信頻度でデータを送信する。 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. A data transmission request including is generated. 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.
　送受信部１２は、データを送信する対象のデータ送信装置２に対して、データ受信制御部１１において生成されたデータ送信要求を送信する。また、送受信部１２は、データ送信装置２から、前述の送信条件に基づいて送信されたデータを受信、すなわちデータを収集する。なお、図１では、データ収集装置１について、データ送信装置２からデータを収集する機能に関わる構成を示しており、その他の構成、例えば、収集したデータを記憶するための記憶部などは省略している。 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. Note that 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.
　データ送信装置２は、データ送信制御部２１と、送受信部２２と、を備える。 The data transmission device 2 includes a data transmission control unit 21 and a transmission / reception unit 22.
　送受信部２２は、データ送信要求をデータ収集装置１から受信する。また、送受信部２２は、データ収集装置１に対してデータを送信する。 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.
　データ送信制御部２１は、データ送信要求に含まれる送信条件に基づいて、送受信部２２がデータを送信するタイミングおよび期間を制御する。具体的に、データ送信制御部２１は、送信条件のうち送信頻度に基づいて送受信部２２がデータを送信するタイミングを制御し、送信条件のうち送信継続時間に基づいて送受信部２２がデータを送信する期間を制御する。なお、図１では、データ送信装置２について、データ収集装置１にデータを送信する機能に関わる構成を示しており、その他の構成、例えば、計測を行う計測部、計測部で計測された計測値であるデータを記憶する記憶部などは省略している。 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. Note that 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.
　つづいて、データ収集システム３において、データ収集装置１がデータ送信装置２からデータを収集する動作について説明する。図２は、本実施の形態にかかるデータ収集システム３においてデータ収集装置１がデータ送信装置２からデータを収集する動作を示すフローチャートである。また、図３は、本実施の形態にかかるデータ収集システム３におけるデータ収集装置１とデータ送信装置２との間の通信内容を示す図である。 Next, the operation of the data collection system 1 for collecting data from the data transmission device 2 in the data collection system 3 will be described. 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.
　データ収集装置１は、データ送信装置２に対して、送信条件を含むデータ送信要求を送信する（ステップＳ１）。図３ではＳ１０１に相当する。詳細には、データ収集装置１において、データ受信制御部１１が、データ送信要求を生成する。送受信部１２は、データ受信制御部１１で生成されたデータ送信要求をデータ送信装置２に送信する。 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.
　データ送信装置２は、データ収集装置１からデータ送信要求を受信すると、データ送信要求に含まれる送信条件に基づいて、データ収集装置１にデータを送信する（ステップＳ２）。図３ではＳ１０２～Ｓ１０５に相当する。詳細には、データ送信装置２において、送受信部２２が、データ収集装置１からデータ送信要求を受信し、受信したデータ送信要求をデータ送信制御部２１に受け渡す。データ送信制御部２１は、データ送信要求に含まれる送信条件、具体的には送信頻度および送信継続時間に基づいて、送受信部２２がデータを送信するタイミングおよび期間を制御する。 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. Specifically, in the data transmission device 2, 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.
　データ送信制御部２１は、最初に送受信部２２がデータ収集装置１にデータを送信したときの時刻である送信開始時刻を記録する。また、データ送信制御部２１は、送信開始時刻に送信継続時間を加算した送信停止時刻を算出する。データ送信制御部２１は、送信開始時刻以降、現在の時刻が送信停止時刻を超えていないか判定する。送信停止時刻を超えていない場合、データ送信制御部２１は、送受信部２２が送信頻度に従ってデータ収集装置１にデータを送信する制御を行う。送信停止時刻を超えた場合、データ送信制御部２１は、送受信部２２からデータ収集装置１へのデータの送信を停止する制御を行う。図３ではＳ１０６に相当する。 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.
　データ収集装置１は、送信条件で指定された送信頻度および送信継続時間によって、データ送信装置２から送信されたデータを収集する（ステップＳ３）。図３ではＳ１０２～Ｓ１０５に相当する。詳細には、データ収集装置１において、送受信部１２は、データ送信装置２から送信されたデータを収集すると、収集したデータを図示しない記憶部に記憶させるなどの処理を行う。 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. Specifically, in the data collection device 1, when 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).
　このように、データ収集装置１は、データ送信装置２に対して、データの送信条件を含むデータ送信要求を送信する。データ送信装置２は、データ収集装置１から受信したデータ送信要求に含まれる送信条件によって指定された送信頻度および送信継続時間で、データを送信する。データ収集装置１は、データの収集を開始する前に１回データ送信装置２にデータ送信要求を送信すればよく、データの送信を停止させるための通信も必要ない。この結果、データ収集装置１は、通信トラフィックを抑制しつつ、効率良く必要な期間においてデータを収集することができる。 In this way, 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.
　なお、データ収集装置１において、データ受信制御部１１は、データ送信装置２のデータの送信頻度を決定していることから、送信頻度で指定されたタイミングでデータを受信できなかった場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定することができる。データ受信制御部１１は、送受信部１２がデータ送信要求を送信してから最初にデータ送信装置２からデータを受信したときの時刻である受信開始時刻を記録する。データ受信制御部１１は、受信開始時刻から送信頻度で指定される期間経過後のタイミングで送受信部１２がデータ送信装置２から次のデータを受信できなかった場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定する。同様に、データ受信制御部１１は、前回のデータ受信時刻から送信頻度で指定される期間経過後のタイミングで送受信部１２がデータ送信装置２から次のデータを受信できなかった場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定する。データ収集装置１は、通信エラーが発生したと判定した場合、図１において図示しない表示部などを用いてユーザに対して通信エラーを通知してもよい。 In the data collection device 1, 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. When 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. Similarly, when 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 previous data reception time, the data reception control unit 11 It is determined that a communication error has occurred between 1 and the data transmission device 2. When determining that a communication error has occurred, the data collection device 1 may notify the user of the communication error using a display unit (not shown in FIG. 1).
　一方、データ受信制御部１１は、受信開始時刻から送信頻度で指定される期間経過後のタイミングで送受信部１２がデータ送信装置２から次のデータを受信できた場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生していないと判定する。同様に、データ受信制御部１１は、前回のデータ受信時刻から送信頻度で指定される期間経過後のタイミングで送受信部１２がデータ送信装置２から次のデータを受信できた場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生していないと判定する。 On the other hand, when 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.
　データ送信装置２がデータを送信する処理にかかる時間、データ収集装置１がデータを受信する処理にかかる時間、およびデータ収集装置１とデータ送信装置２との間の通信状態によって、通常の通信において許容できる程度の遅延が発生する可能性がある。そのため、データ収集装置１は、前述の送信頻度に対して許容できる程度の遅延時間をマージンとして付加したものを、通信エラーを判定するために使用してもよい。また、後述するように送信頻度が変更されることもあることから、データ収集装置１は、送信頻度が周期、例えば５秒毎の場合、前後にマージンを持たせて５±０．５秒の範囲でデータを受信できれば通信は正常であると判定してもよい。 In normal communication depending on the time required for the data transmitting device 2 to transmit data, the time required for the data collecting device 1 to receive data, and the communication state between the data collecting device 1 and the data transmitting device 2 An acceptable delay may occur. For this reason, 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.
　同様に、データ収集装置１において、データ受信制御部１１は、受信開始時刻を記録していること、また、データ送信装置２のデータの送信継続時間を決定していることから、受信開始時刻から送信継続時間で指定された期間でデータを受信できなかった場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定することができる。後述するように送信継続時間が変更されることもあることから、データ収集装置１は、例えば、送信継続時間が３０分の場合、前後にマージンを持たせて３０分±５秒の期間でデータを受信できれば通信は正常であると判定してもよい。 Similarly, in the data collection device 1, 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.
　また、データ収集装置１において、データ受信制御部１１は、データの送信を継続中のデータ送信装置２に対して、送信条件で指定した送信頻度または送信継続時間のいずれかまたは両方を変更することも可能である。この場合、データ受信制御部１１は、送信頻度または送信継続時間のいずれかまたは両方を変更した内容の送信条件を含む新たなデータ送信要求を生成する。送受信部１２は、データ受信制御部１１によって生成された新たなデータ送信要求をデータ送信装置２に送信する。データ送信装置２では、データの送信を継続している状態において新たにデータ送信要求を受信した場合、最初に受信したデータ送信要求に含まれる送信条件などをリセットし、新たに受信したデータ送信要求に含まれる送信条件に基づいてデータの送信を行う。 In the data collection device 1, 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. In the data transmission device 2, when a new data transmission request is received in a state where data transmission is continued, 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.
　これにより、データ収集装置１は、所望のデータ送信装置２から十分にデータを受信できている場合には、送信頻度を減らす、または送信継続時間を短くすることができる。一方、データ収集装置１は、所望のデータ送信装置２から十分にデータを受信できていない場合には、送信頻度を増やす、または送信継続時間を長くすることができる。また、データ収集装置１は、自装置が有するアプリケーションにおいて必要なデータ更新間隔でデータを収集することが可能である。データ収集装置１は、例えば、必要なデータが装置の電流値の場合は送信頻度を１秒毎に１度とし、必要なデータが装置の電力量の場合は送信頻度を１時間毎に１度とする。データ収集装置１は、監視画面を確認しているユーザからの操作を受け付けて送信頻度を変更する。また、データ収集装置１は、ユーザからの操作を受け付けて送信継続時間を変更することも可能である。これにより、データ収集装置１は、監視画面に表示するデータの収集期間の範囲を、ユーザの要求により変更することができる。監視画面については図１で図示していないが、データ収集装置１が監視画面を表示する表示部を備えていてもよいし、データ収集装置１が外部の表示装置に監視画面を表示させてもよい。 Thereby, 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. On the other hand, 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. In addition, 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. Thereby, the data collection device 1 can change the range of the data collection period displayed on the monitoring screen according to a user request. Although the monitoring screen is not shown in FIG. 1, 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.
　また、データ収集装置１において、データ受信制御部１１は、データ送信装置２に対して送信条件を変更していた場合、データ送信装置２が変更前の送信条件に基づいてデータを送信してきたときは、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定してもよい。この場合、データ受信制御部１１は、送信条件を変更するためのデータ送信要求がデータ送信装置２で受信できていなかったと判定する。また、データ収集装置１において、データ受信制御部１１は、データ送信装置２にデータ送信要求を送信してから規定された時間経過してもデータ送信装置２からデータを受信できない場合、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判定してもよい。また、データ収集装置１において、データ受信制御部１１は、前述の受信開始時刻に送信継続時間を加算した受信終了時刻を過ぎてもデータ送信装置２からデータを受信した場合、データ収集装置１とデータ送信装置２との間で大きな遅延が発生しているとして、通信エラーが発生したと判定してもよい。 Further, in the data collection device 1, 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. Further, in the data collection device 1, 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.
　ここで、データ収集装置１およびデータ送信装置２の動作を、フローチャートを用いて説明する。 Here, operations of the data collection device 1 and the data transmission device 2 will be described with reference to flowcharts.
　図４は、本実施の形態にかかるデータ収集装置１の動作を示すフローチャートである。まず、データ収集装置１において、データ受信制御部１１がデータ送信装置２に対するデータ送信要求を生成し、送受信部１２からデータ送信装置２に送信する（ステップＳ１１）。データ受信制御部１１は、送受信部１２において、データ送信要求を送信してから規定された時間内にデータ送信装置２からデータを受信したか否かを確認する（ステップＳ１２）。データ送信要求を送信したにもかかわらず、データ収集装置１がデータ送信装置２からのデータを受信できず、データの送信を待ち続ける事態を回避するためである。データ受信制御部１１は、送受信部１２において、データ送信要求を送信してから規定された時間内にデータ送信装置２からデータを受信した場合（ステップＳ１２：Ｙｅｓ）、送受信部１２が最初にデータを受信した時刻である受信開始時刻を記録する（ステップＳ１３）。また、データ受信制御部１１は、受信開始時刻に送信継続時間を加算して受信終了時刻を算出する（ステップＳ１４）。 FIG. 4 is a flowchart showing the operation of the data collection device 1 according to the present embodiment. First, in the data collection device 1, 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. In the data reception control unit 11, 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).
　データ受信制御部１１は、ステップＳ１１で生成したデータ送信要求に含まれる送信条件に変更がない場合（ステップＳ１５：Ｎｏ）、送受信部１２において、送信条件で指定された送信頻度でデータ送信装置２からデータを受信したか否かを確認する（ステップＳ１６）。データ受信制御部１１は、送受信部１２において、送信条件で指定された送信頻度でデータ送信装置２からデータを受信し（ステップＳ１６：Ｙｅｓ）、かつ受信終了時刻を超えていない場合（ステップＳ１７：Ｙｅｓ）、正常にデータが受信できたと判定する（ステップＳ１８）。以降、データ収集装置１は、ステップＳ１５に戻って同様の処理を繰り返し実施する。 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.
　データ受信制御部１１は、送受信部１２がデータ送信要求を送信してから規定された時間内にデータ送信装置２からデータを受信できなかった場合（ステップＳ１２：Ｎｏ）、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判断し（ステップＳ１９）、ユーザに対して通信エラーが発生したことを示す表示を行って（ステップＳ２０）、動作を終了する。 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.
　データ受信制御部１１は、ステップＳ１１で生成したデータ送信要求に含まれる送信条件に変更がある場合（ステップＳ１５：Ｙｅｓ）、現在の送信条件、受信開始時刻、および受信終了時刻をリセットし（ステップＳ２１）、ステップＳ１１に戻って、変更後の送信条件の内容でデータ送信要求を生成する。以降の動作は前述の通りである。 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.
　データ受信制御部１１は、送受信部１２において、送信条件で指定された送信頻度でデータ送信装置２からデータを受信できなかった場合（ステップＳ１６：Ｎｏ）、受信終了時刻を超えていないか否かを確認する（ステップＳ２２）。データ受信制御部１１は、受信終了時刻を超えていない場合（ステップＳ２２：Ｙｅｓ）、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判断し（ステップＳ１９）、ユーザに対して通信エラーが発生したことを示す表示を行って（ステップＳ２０）、動作を終了する。データ受信制御部１１は、受信終了時刻を超えていた場合（ステップＳ２２：Ｎｏ）、データ送信装置２からのデータの送信が正常に終了したと判断し（ステップＳ２３）、動作を終了する。 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.
　データ受信制御部１１は、送受信部１２において、送信条件で指定された送信頻度でデータ送信装置２からデータを受信したが（ステップＳ１６：Ｙｅｓ）、受信終了時刻を超えていた場合（ステップＳ１７：Ｎｏ）、データ収集装置１とデータ送信装置２との間で通信エラーが発生したと判断し（ステップＳ１９）、ユーザに対して通信エラーが発生したことを示す表示を行って（ステップＳ２０）、動作を終了する。 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.
　図５は、本実施の形態にかかるデータ送信装置２の動作を示すフローチャートである。まず、データ送信装置２において、送受信部２２がデータ収集装置１からデータ送信要求を受信すると（ステップＳ３１）、データ送信要求をデータ送信制御部２１に受け渡す。データ送信制御部２１は、データ送信要求に含まれる送信条件に基づいて送受信部２２を制御し、送受信部２２がデータ収集装置１にデータを送信する（ステップＳ３２）。データ送信制御部２１は、送受信部２２が最初にデータを送信した時刻である送信開始時刻を記録する（ステップＳ３３）。また、データ送信制御部２１は、送信開始時刻に送信継続時間を加算して送信停止時刻を算出する（ステップＳ３４）。 FIG. 5 is a flowchart showing the operation of the data transmission device 2 according to the present embodiment. First, in the data transmission device 2, when the transmission / reception unit 22 receives a data transmission request from the data collection device 1 (step S31), the data transmission request is transferred to the data transmission control unit 21. 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).
　データ送信制御部２１は、送受信部２２において新たにデータ送信要求を受信していない場合（ステップＳ３５：Ｎｏ）、送信頻度で指定された送信タイミングになり（ステップＳ３６：Ｙｅｓ）、かつ送信停止時刻を超えていない場合（ステップＳ３７：Ｙｅｓ）、送受信部２２を制御して、送受信部２２からデータ収集装置１にデータを送信する（ステップＳ３８）。以降、データ送信装置２は、ステップＳ３５に戻って同様の処理を繰り返し実施する。 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.
　データ送信制御部２１は、送受信部２２において新たにデータ送信要求を受信した場合（ステップＳ３５：Ｙｅｓ）、現在の送信条件、送信開始時刻、および送信停止時刻をリセットし（ステップＳ３９）、ステップＳ３２に戻って、新たなデータ送信要求に含まれる送信条件に基づいて送受信部２２を制御し、送受信部２２がデータ収集装置１にデータを送信する（ステップＳ３２）。 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).
　データ送信制御部２１は、送信頻度で指定された送信タイミングになっていない場合（ステップＳ３６：Ｎｏ）、送信頻度で指定された送信タイミングになるまで待機する。データ送信制御部２１は、送信停止時刻を超えていた場合（ステップＳ３７：Ｎｏ）、送信条件に基づくデータの送信は終了したとして（ステップＳ４０）、データの送信を行わず動作を終了する。 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).
　つづいて、データ収集装置１のハードウェア構成について説明する。データ収集装置１において、送受信部１２は、データ送信装置２との間で無線通信が可能なインタフェース回路により実現される。データ受信制御部１１は処理回路により実現される。すなわち、データ受信制御部１１は、データ送信要求を生成し、通信エラーを判定するための処理回路を備える。処理回路は、専用のハードウェアであってもよいし、メモリに格納されるプログラムを実行するＣＰＵ（Central　Processing　Unit）およびメモリであってもよい。 Next, the hardware configuration of the data collection device 1 will be described. In the data collection device 1, 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.
　図６は、本実施の形態にかかるデータ受信制御部１１をＣＰＵおよびメモリを用いて構成する場合の例を示す図である。前述のインタフェース回路は、図６のインタフェース回路９１である。処理回路がＣＰＵ９２およびメモリ９３で構成される場合、データ受信制御部１１の機能は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェアまたはファームウェアはプログラムとして記述され、メモリ９３に格納される。処理回路では、メモリ９３に記憶されたプログラムをＣＰＵ９２が読み出して実行することにより、各部の機能を実現する。すなわち、データ受信制御部１１は、処理回路により実行されるときに、データ送信要求を生成するステップ、通信エラーを判定するステップが結果的に実行されることになるプログラムを格納するためのメモリ９３を備える。また、これらのプログラムは、データ受信制御部１１の手順および方法をコンピュータに実行させるものであるともいえる。ここで、ＣＰＵ９２は、処理装置、演算装置、マイクロプロセッサ、マイクロコンピュータ、プロセッサ、またはＤＳＰ（Digital　Signal　Processor）などであってもよい。また、メモリ９３とは、例えば、ＲＡＭ（Random　Access　Memory）、ＲＯＭ（Read　Only　Memory）、フラッシュメモリ、ＥＰＲＯＭ（Erasable　Programmable　ＲＯＭ）、ＥＥＰＲＯＭ（登録商標）（Electrically　ＥＰＲＯＭ）などの、不揮発性または揮発性の半導体メモリ、磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスク、またはＤＶＤ（Digital　Versatile　Disc）などが該当する。 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. When 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. In the processing circuit, the CPU 92 reads out and executes the program stored in the memory 93, thereby realizing the function of each unit. That is, 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. Is provided. These programs can also be said to cause a computer to execute the procedure and method of the data reception control unit 11. Here, 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). Such semiconductor memory, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD (Digital Versatile Disc), and the like are applicable.
　図７は、本実施の形態にかかるデータ受信制御部１１を専用のハードウェアを用いて構成する場合の例を示す図である。処理回路が専用のハードウェアである場合、図７に示す処理回路９４は、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ（Application　Specific　Integrated　Circuit）、ＦＰＧＡ（Field　Programmable　Gate　Array）、またはこれらを組み合わせたものが該当する。データ受信制御部１１の各機能を機能毎に処理回路９４で実現してもよいし、各機能をまとめて処理回路９４で実現してもよい。 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. When 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.
　なお、データ受信制御部１１の各機能について、一部を専用のハードウェアで実現し、一部をソフトウェアまたはファームウェアで実現するようにしてもよい。このように、処理回路は、専用のハードウェア、ソフトウェア、ファームウェア、またはこれらの組み合わせによって、上述の各機能を実現することができる。 Note that a part of 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. As described above, the processing circuit can realize the above-described functions by dedicated hardware, software, firmware, or a combination thereof.
　データ収集装置１のハードウェア構成について説明したが、データ送信装置２のハードウェア構成についても同様に、図６または図７に示す構成により実現可能である。 Although 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.
　以上説明したように、本実施の形態によれば、データ収集装置１は、データ送信装置２に対してデータの送信条件を含むデータ送信要求を送信し、データ送信装置２は、データ収集装置１から受信したデータ送信要求に含まれる送信条件によって指定された送信頻度および送信継続時間でデータを送信することとした。このように、データ収集装置１は、データ送信装置２に対して１回データ送信要求を送信するだけでよいことから、通信トラフィックを抑制しつつ、所望のデータ送信装置２からデータを収集することができる。また、データ収集装置１は、データ送信装置２の種類または自装置での用途にあわせて、データ送信装置２に対して送信条件を指定できることから、無駄な通信トラフィックの発生を回避することができる。 As described above, according to the present embodiment, 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. In this way, 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. Further, since 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. .
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 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　データ収集装置、２　データ送信装置、３　データ収集システム、１１　データ受信制御部、１２，２２　送受信部、２１　データ送信制御部。 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.

Claims (16)

  1. 　データを送信する送信頻度および送信継続時間を含むデータ送信要求をデータ送信装置に送信するデータ収集装置と、前記データ送信装置と、を備え、
    　前記データ送信装置は前記送信継続時間の期間、前記送信頻度で前記データを送信する、
    　ことを特徴とするデータ収集システム。     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 the data transmission device,
    The data transmitting device transmits the data at the transmission frequency during the transmission duration period;
    A data collection system characterized by that.
  2. 　前記データ収集装置は、前記送信頻度を変更する場合、変更後の送信頻度を含む新たなデータ送信要求を前記データ送信装置に送信する、
    　ことを特徴とする請求項１に記載のデータ収集システム。     When changing the transmission frequency, the data collection device transmits a new data transmission request including the changed transmission frequency to the data transmission device.
    The data collection system according to claim 1.
  3. 　前記データ収集装置は、前記送信頻度で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項１または２に記載のデータ収集システム。     The data collection device determines that a communication error has occurred between itself and the data transmission device when the data cannot be received at the transmission frequency,
    The data collection system according to claim 1, wherein the data collection system is a data collection system.
  4. 　前記データ収集装置は、前記送信継続時間を変更する場合、変更後の送信継続時間を含む新たなデータ送信要求を前記データ送信装置に送信する、
    　ことを特徴とする請求項１から３のいずれか１つに記載のデータ収集システム。     When the data collection device changes the transmission duration, the data collection device transmits a new data transmission request including the transmission duration after the change to the data transmission device.
    The data collection system according to any one of claims 1 to 3.
  5. 　前記データ収集装置は、前記送信継続時間で指定された期間で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項１から４のいずれか１つに記載のデータ収集システム。     The data collection device determines that a communication error has occurred between the device itself and the data transmission device when the data cannot be received in the period specified by the transmission duration time;
    The data collection system according to claim 1, wherein the data collection system is a data collection system.
  6. 　データを送信する送信頻度および送信継続時間を含むデータ送信要求を生成するデータ受信制御部と、
    　前記データを送信するデータ送信装置に前記データ送信要求を送信し、前記データ送信装置から、前記送信継続時間の期間、前記送信頻度で送信された前記データを受信する送受信部と、
    　を備えることを特徴とするデータ収集装置。     A data reception control unit for generating a data transmission request including a transmission frequency and a transmission duration for transmitting data;
    A transmission / reception unit that transmits the data transmission request to a data transmission device that transmits the data, and receives the data transmitted at the transmission frequency from the data transmission device during the transmission duration period;
    A data collection device comprising:
  7. 　前記データ受信制御部は、前記送信頻度を変更する場合、変更後の送信頻度を含む新たなデータ送信要求を生成する、
    　ことを特徴とする請求項６に記載のデータ収集装置。     When the data reception control unit changes the transmission frequency, it generates a new data transmission request including the changed transmission frequency.
    The data collection device according to claim 6.
  8. 　前記データ受信制御部は、前記送受信部において、前記送信頻度で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項６または７に記載のデータ収集装置。     The data reception control unit determines that a communication error has occurred between the own device and the data transmission device when the transmission / reception unit fails to receive the data at the transmission frequency.
    The data collection device according to claim 6, wherein the data collection device is a data collection device.
  9. 　前記データ受信制御部は、前記送信継続時間を変更する場合、変更後の送信継続時間を含む新たなデータ送信要求を生成する、
    　ことを特徴とする請求項６から８のいずれか１つに記載のデータ収集装置。     The data reception control unit generates a new data transmission request including a transmission duration after the change when changing the transmission duration.
    The data collection device according to claim 6, wherein the data collection device is a data collection device.
  10. 　前記データ受信制御部は、前記送受信部において、前記送信継続時間で指定された期間で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項６から９のいずれか１つに記載のデータ収集装置。     The data reception control unit determines that a communication error has occurred between the own device and the data transmission device when the transmission / reception unit fails to receive the data within a period specified by the transmission duration time. ,
    The data collection device according to claim 6, wherein the data collection device is a data collection device.
  11. 　データを送信する送信頻度および送信継続時間を含むデータ送信要求をデータ収集装置から受信し、前記データ収集装置に対して前記データを送信する送受信部と、
    　前記送受信部が、前記送信継続時間の期間、前記送信頻度で前記データを送信するタイミングおよび期間を制御するデータ送信制御部と、
    　を備えることを特徴とするデータ送信装置。     A transmission / reception unit that receives a data transmission request including a transmission frequency and a transmission duration time for transmitting data from the data collection device, and transmits the data to the data collection device;
    A data transmission control unit for controlling a timing and a period during which the transmission / reception unit transmits the data at the transmission frequency period, the transmission frequency;
    A data transmission device comprising:
  12. 　データ収集装置が、データを送信する送信頻度および送信継続時間を含むデータ送信要求を送信するデータ送信要求ステップと、
    　データ送信装置が、前記送信継続時間の期間、前記送信頻度で前記データを送信するデータ送信ステップと、
    　前記データ収集装置が、前記データ送信装置から送信された前記データを収集するデータ受信ステップと、
    　を含むことを特徴とするデータ収集方法。     A data transmission request step in which the data collection device transmits a data transmission request including a transmission frequency and a transmission duration for transmitting data;
    A data transmission step in which the data transmission device transmits the data at the transmission frequency during the transmission duration period;
    A data receiving step in which the data collection device collects the data transmitted from the data transmission device; and
    A data collection method comprising:
  13. 　前記データ送信要求ステップにおいて、前記データ収集装置は、前記送信頻度を変更する場合、変更後の送信頻度を含む新たなデータ送信要求を前記データ送信装置に送信する、
    　ことを特徴とする請求項１２に記載のデータ収集方法。     In the data transmission request step, when changing the transmission frequency, the data collection device transmits a new data transmission request including the changed transmission frequency to the data transmission device.
    The data collection method according to claim 12, wherein:
  14. 　前記データ受信ステップにおいて、前記データ収集装置は、前記送信頻度で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項１２または１３に記載のデータ収集方法。     In the data reception step, the data collection device determines that a communication error has occurred between the device itself and the data transmission device when the data cannot be received at the transmission frequency.
    The data collection method according to claim 12 or 13, characterized in that:
  15. 　前記データ送信要求ステップにおいて、前記データ収集装置は、前記送信継続時間を変更する場合、変更後の送信継続時間を含む新たなデータ送信要求を前記データ送信装置に送信する、
    　ことを特徴とする請求項１２から１４のいずれか１つに記載のデータ収集方法。     In the data transmission request step, when changing the transmission duration, the data collection device transmits a new data transmission request including the changed transmission duration to the data transmission device.
    The data collection method according to claim 12, wherein the data collection method is a data collection method.
  16. 　前記データ受信ステップにおいて、前記データ収集装置は、前記送信継続時間で指定された期間で前記データを受信できなかった場合、自装置と前記データ送信装置との間で通信エラーが発生したと判断する、
    　ことを特徴とする請求項１２から１５のいずれか１つに記載のデータ収集方法。     In the data reception step, the data collection device determines that a communication error has occurred between itself and the data transmission device when the data collection device cannot receive the data within the period specified by the transmission duration time. ,
    The data collection method according to claim 12, wherein the data collection method is a data collection method.
PCT/JP2017/002585 2017-01-25 2017-01-25 Data collection system, data collection apparatus, data transmission apparatus and data collection method WO2018138809A1 (en)

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