JP6511131B2 - Observation data relay device, observation system - Google Patents

Description

  The present invention relates to an observation data relay device for relaying observation data for observing physical changes such as landslides, and an observation system including the observation data relay device.

  At present, various systems for observing landslides and the like have been devised from the viewpoint of disaster prevention. For example, the observation data collection system described in Patent Document 1 includes a plurality of analysis devices, a plurality of relay devices, and an aggregation device.

  A plurality of analysis devices are linked to one relay device. The analysis devices linked by each relay device are different. The aggregation device is linked to a plurality of relay devices.

  The relay apparatus acquires observation data of a plurality of analysis apparatuses to which the relay apparatus is linked. The relay device collectively transmits the plurality of acquired observation data to the aggregation device.

  As described above, in the conventional observation data collection system, the analysis device for acquiring observation data transmits observation data to the aggregation device via the repeater.

JP, 2004-185459, A

  In the above-described conventional observation data collection system, even when data communication between the relay device and the aggregation device is established, observation data may not be sent to the aggregation device. Such a problem is often caused by a failure in the communication function of the repeater.

  However, in the conventional observation data collection system, even if such a failure occurs, the relay itself can not detect this failure. Then, during the period in which the failure of the repeater occurs, the observation data can not be transmitted to the aggregation device, resulting in the loss of observation data.

  An object of the present invention is to automatically detect a failure in wireless communication and restore communication.

  An observation data relay device according to the present invention includes a wireless LAN access point receiving observation data from the outside, a router transmitting observation data to a device connected to the network, and wireless LAN control performing wireless communication with the wireless LAN access point And a controller. When the control unit detects that wireless communication between the wireless LAN access point and the wireless LAN control unit is not established, the control unit performs reset control of the wireless LAN access point.

  In this configuration, the failure of the wireless LAN access point can be detected and reset by the observation data relay device itself including the wireless LAN access point.

  Further, the observation data relay device of the present invention includes an AP power supply for supplying power to the wireless LAN control unit and the wireless LAN access point. The control unit temporarily stops power supply from the AP power supply to the wireless LAN access point as reset control.

  In this configuration, when the power supply to the wireless LAN access point is cut off, the wireless LAN access point can be reset reliably.

  In addition, the observation data relay device of the present invention further includes a GNSS receiver that receives the GNSS signal and generates observation data.

  In this configuration, the observation data relay apparatus can generate observation data.

  Further, in the observation data relay device of the present invention, the control unit performs reset control of the wireless LAN control unit when detecting that wireless communication between the wireless LAN access point and the wireless LAN control unit is not established.

  In this configuration, the wireless communication can be reset even if the wireless LAN control unit causes the wireless communication not to be established.

  Moreover, the observation system of this invention is equipped with the observation data relay apparatus in any one of the above-mentioned, an observation data transmission apparatus, and a file server. The observation data transmission apparatus receives the GNSS signal, generates observation data, and transmits the observation data to the observation data relay apparatus by wireless communication. The file server connects to the observation data transmitting apparatus via the network and stores the observation data.

  In this configuration, it is possible to realize an observation system in which a failure of the observation data relay device is detected by the observation data relay device itself and returned. Thereby, it is possible to suppress the loss of observation data to be stored in the file server. Further, by providing the observation data relay apparatus with the function of generating observation data, it is possible to reduce the number of single observation data transmitters without reducing the number of observation data stored in the file server.

  According to the present invention, the observation data relay device can automatically detect the failure of its own communication and restore the communication.

Block diagram of observation system according to the first embodiment of the present invention Flow chart of reset control of wireless LAN AP according to the first embodiment of the present invention Flow chart of reset control of wireless LAN AP and wireless LAN control unit according to the second embodiment of the present invention Block diagram of observation system according to the third embodiment of the present invention

  An observation data relay device and an observation system according to a first embodiment of the present invention will be described with reference to the drawings. In addition, the observation system shown by this embodiment is used for a landslide detection system etc., for example. However, in a system that analyzes a predetermined phenomenon using observation data acquired at a remote location, the configuration and method of the present embodiment can be applied as long as the system transmits and receives observation data by wireless communication.

  FIG. 1 is a block diagram of an observation system according to a first embodiment of the present invention. The observation system 10 includes a child device (observation data transmission device) 20, a parent device (observation data relay device) 30, a file server 40, an analysis device 50, and a communication network 100.

  The slave unit 20 is disposed at the observation position. When the observation position is at a plurality of positions, the child device 20 is arranged for each observation position.

  The slave unit 20 includes a control unit 21, a GNSS receiver 22, a GNSS antenna 23, a wireless LAN control unit 24, a wireless LAN antenna 25, a memory 26, and a notification unit 27. The slave unit 20 is disposed at the observation target position. The slave unit 20 is preferably arranged in an open sky environment as much as possible.

  The control unit 21 performs overall control of the child device 20. Further, the control unit 21 temporarily stores observation data, and uploads the stored observation data to the file server 40 via the parent device 30 and the communication network 100 every upload time.

  The GNSS receiver 22 is connected to the control unit 21. The GNSS receiver 22 generates observation data from the GNSS signal received by the GNSS antenna 23. The GNSS receiver 22 outputs the generated observation data to the control unit 21.

  GNSS is an abbreviation of Global Navigation Satellite System, and includes GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), Galileo and the like.

  In addition, the interval (interval of observation time) which generates observation data is shorter than the interval of uploading time which control part 21 performs. For example, the interval between observation times is 1 second, and the interval between upload times is 5 minutes. These intervals can be changed by the analysis device 50 or the like.

  The observation data generated by the GNSS receiver 22 is data used for analysis and detection of landslide, such as carrier wave phase. The observation data is data obtained from the reception result (data obtained by acquisition and tracking) of the GNSS signal.

  The GNSS receiver 22 also demodulates the navigation message from the GNSS signal. The GNSS receiver 22 obtains time data from the navigation message. The GNSS receiver 22 may position the handset 20 from the tracking result of the GNSS signal. In this case, the observation data includes the positioning result.

  The wireless LAN control unit 24 is connected to the wireless LAN antenna 25 and the control unit 21. The wireless LAN control unit 24 executes wireless communication with the wireless LAN AP 32 via the wireless LAN antenna 25 and the wireless LAN antenna 31 according to a predetermined protocol. The wireless LAN control unit 24 converts the observation data supplied from the control unit 21 into a wireless communication protocol, and transmits it from the wireless LAN antenna 25. Also, the wireless LAN control unit 24 converts the protocol of the remote setting data from the base unit 30 received by the wireless LAN antenna 25 and outputs the converted data to the control unit 21.

  The memory 26 is connected to the control unit 21. The memory 26 temporarily stores observation data.

  The notification unit 27 is connected to the control unit 21. The notification unit 27 is configured of a simple display element such as an LED. The notification unit 27 is driven to a predetermined display mode by a notification signal from the control unit 21.

  The parent device 30 includes wireless LAN antennas 31 and 36, wireless LAN AP (access point) 32, router 33, control unit 34, wireless LAN control unit 35, GNSS receiver 37, GNSS antenna 38, memory 39, and power supply 300. Equipped with Similarly to the slave unit 20, the master unit 30 is preferably disposed at the observation position, and is preferably disposed in an open sky environment as much as possible.

  The control unit 34, the wireless LAN control unit 35, the wireless LAN antenna 36, the GNSS receiver 37, the GNSS antenna 38, and the memory 39 are the above-described control unit 21 of the slave 20, the wireless LAN control unit 24, and the wireless LAN antenna 25. , GNSS receiver 22, GNSS antenna 23, and memory 26 have the same function.

  Further, the control unit 34 monitors the communication state between the wireless LAN control unit 35 and the wireless LAN AP 32. The control unit 34 performs reset control on the power supply 300 if the wireless communication needs to be reset. The specific content of the reset control will be described later.

  The wireless LAN AP 32 executes wireless communication with the wireless LAN control unit 24 via the wireless LAN antenna 31 and the wireless LAN antenna 25 according to a predetermined protocol. Further, the wireless LAN AP 32 converts the observation data from the slave unit 20 received by the wireless LAN antenna 31 into a protocol and outputs the converted data to the router 33.

  The wireless LAN AP 32 executes wireless communication with the wireless LAN control unit 35 via the wireless LAN antenna 31 and the wireless LAN antenna 36 in the parent device 30 according to a predetermined protocol. Further, the wireless LAN AP 32 converts the observation data generated by the master unit 30 and received by the wireless LAN antenna 31 into a protocol and outputs the converted data to the router 33.

  The wireless LAN AP 32 converts the protocol of the remote setting data acquired via the router 33 and transmits it from the wireless LAN antenna 31.

  The router 33 connects the wireless LAN AP 32 to the network 100. That is, the router 33 performs protocol conversion between the wireless communication network of the part having the functions of the child device in the child device 20 and the parent device 30 and the parent device 30, and the network 100. The router 33 transmits observation data output from the wireless LAN AP 32 to the file server 40. The router 33 outputs a setting signal from the analysis device 50 connected via the network 100 to the wireless LAN AP 32.

  The file server 40 stores observation data transmitted from the parent device 30. In addition, the file server 40 transmits observation data to the analysis device 50 in response to a read request from the analysis device 50.

  The analysis device 50 uses the observation data read from the file server 40 to generate detection data for the observation target. For example, if the observation system 10 is a landslide detection system, position change and velocity of each observation position are acquired from observation data to detect a landslide. The analysis device 50 transmits a setting signal to the parent device 30 and the child device 20. The setting signal is set by the operator using the operation input unit provided in the analysis device 50. Further, the setting signal is set based on the analysis result obtained by the analysis device 50 so far.

  In the observation system having such a configuration, the parent device (observation data relay device) 30 performs reset control of the wireless LAN AP 32 by the following method. FIG. 2 is a flowchart of reset control of the wireless LAN AP according to the first embodiment of the present invention.

  The control unit 34 acquires observation data at the observation time and stores the observation data in the memory 39 (S101). The control unit 34 continues acquisition and storage of observation data until it is detected that the upload time has been reached (S102: NO).

  When the control unit 34 detects that the upload time has come (S102: YES), the control unit 34 performs wakeup control of the wireless LAN control unit 35 (S103). As a result, the power supply 300 supplies power to the wireless LAN control unit 35, and the wireless LAN control unit 35 is activated.

  When activated, the wireless LAN control unit 35 executes negotiation regarding communication with the wireless LAN AP 32 (S104). The wireless LAN control unit 35 outputs the result of the negotiation to the control unit 34.

  The control unit 34 detects whether the wireless connection between the wireless LAN control unit 35 and the wireless LAN AP 32 has been established from the result of the negotiation. If the wireless connection is established (S105: YES), the control unit 34 transmits observation data by wireless communication between the wireless LAN control unit 35 and the wireless LAN AP 32 (S106).

  If the wireless connection is not established (S105: NO), the control unit 34 detects whether or not the reset condition is met (S107). The reset condition is based on the number of negotiations and the elapsed time from the start of the negotiation. On the basis of the number, it is a reset condition that the number of negotiation failures has reached the threshold number. When the elapsed time is used as a reference, it is a reset condition that the elapsed time has reached the threshold time.

  The control unit 34 does not perform reset control during a period in which the reset condition is not met (S107: NO). Thereby, the wireless LAN control unit 35 continues the negotiation regarding the communication with the wireless LAN AP 32.

  When detecting that the reset condition is met (S107: YES), the control unit 34 performs reset control of the wireless LAN AP32. Specifically, the power supply to the wireless LAN AP 32 is stopped.

  Thus, by using the configuration of the present embodiment, even if a wireless communication failure due to a failure of the wireless LAN AP 32 of the parent device 30 occurs, this can be reliably detected. Furthermore, a wireless communication failure by the wireless LAN AP 32 of the parent device 30 can be automatically recovered.

  Furthermore, in the configuration of the present embodiment, since the master unit 30 has the function of the slave unit 20, the number of slave units prepared as the observation system 10 can be reduced by one. In particular, a landslide detection system always requires a slave unit at a stationary position. In addition, since the master unit has a relay function of observation data, it is preferable to place the master unit at a stationary position. Therefore, by sharing the slave unit whose position does not move with the master unit, the slave unit and the master unit can be used more effectively and effectively.

  Next, an observation data relay device and an observation system according to a second embodiment will be described with reference to the drawings. The observation data relay device and the observation system according to the present embodiment are different from the observation data relay device and the observation system according to the first embodiment only in reset control.

  FIG. 3 is a flowchart of reset control of the wireless LAN AP and the wireless LAN control unit according to the second embodiment of the present invention. As shown in FIG. 3, in the observation data relay device and the observation system of the present embodiment, only the reset control is different, so only the different points will be described.

  When detecting that the reset condition is met (S107: YES), the control unit 34 performs reset control of the wireless LAN AP 32 and the wireless LAN control unit 35. Specifically, the power supply to the wireless LAN AP 32 and the wireless LAN control unit 35 is stopped.

  By performing such control, even if the problem of the wireless communication with the wireless LAN AP 32 and the wireless LAN control unit 35 is not due to the wireless LAN AP 32 but is due to the wireless LAN control unit 35, the wireless communication Can return. Thereby, return of wireless communication can be performed more reliably.

  Next, an observation data relay device and an observation system according to a third embodiment will be described with reference to the drawings. The observation data relay device and the observation system according to the present embodiment differ from the first embodiment in the configuration of the observation data relay device. FIG. 4 is a block diagram of an observation system according to a third embodiment of the present invention.

  The observation data relay device 30A according to the present embodiment is obtained by omitting the GNSS receiver 37 and the GNSS antenna 38 from the observation data relay device 30 according to the first embodiment.

  Even with such a configuration, the same effects as those of the first embodiment can be obtained. Furthermore, the components of the observation data relay device 30A of this embodiment can be reduced. As a result, the observation data relay device 30A can be configured compactly and inexpensively. The memory 39 can be further omitted.

  In the above description, the aspect of stopping the power supply to the wireless LAN AP 32 or the wireless LAN control unit 35 has been shown as the reset control. However, it is also possible to use other aspects as the reset control. For example, the control unit 34 may generate a reset signal, and force the wireless LAN AP 32 or the wireless LAN control unit 35 to restart by the reset signal.

10: Observation system 20: Slave unit (observation data transmitter)
21: Control unit 22: GNSS receiver 23: GNSS antenna 24: Wireless LAN control unit 25: Wireless LAN antenna 26: Memory 27: Notification unit 30, 30A: Master unit (observation data relay device)
31, 36: Wireless LAN antenna 32: Wireless LAN AP
33: Router 34: Control unit 35: Wireless LAN control unit 37: GNSS receiver 38: GNSS antenna 39: Memory 40: File server 50: Analysis device 100: Communication network 300: Power supply

Claims (7)

A GNSS receiver that receives GNSS signals and generates observation data;
A storage unit for temporarily storing the observation data;
A wireless LAN control unit that performs wireless communication with a wireless LAN access point via a wireless LAN antenna;
A control unit that configures an observation data transmission apparatus together with the GNSS receiver, the storage unit, and the wireless LAN control unit, and controls the observation data transmission apparatus;
The wireless LAN access point receiving the observation data transmitted from the wireless LAN control unit via the wireless LAN antenna;
A router for transmitting the observation data to a device connected to the network;
Consists of
The control unit detects whether wireless communication between the wireless LAN access point and the wireless LAN control unit has been established.
If the establishment of the wireless communication can be detected, the observation data obtained by wireless communication between the wireless LAN control unit and the wireless LAN access point is transmitted via the router.
When the establishment of the wireless communication can not be detected, reset control of the wireless LAN access point is performed.
An observation data relay apparatus characterized in that. The observation data relay apparatus according to claim 1,
The wireless LAN control unit and an AP power supply for supplying power to the wireless LAN access point;
The control unit temporarily stops power supply from the AP power supply to the wireless LAN access point as reset control.
Observation data relay device. The observation data relay apparatus according to claim 2,
The control unit performs reset control of the wireless LAN control unit when detecting that the wireless communication has not been established.
Observation data relay device. An observation data relay apparatus according to any one of claims 1 to 3.
An observation data transmission device disposed at an observation position different from the observation data relay device;
A file server for storing the observation data transmitted from the observation data relay apparatus via the router ;
An observation system consisting of
The observation data relay device generates observation data at the arranged observation position,
The observation data transmission apparatus receives a GNSS signal, generates observation data at the observation position, and transmits the observation data to the observation data relay apparatus by wireless communication.
The file server stores the observation data at each observation position.
Observation system. 5. The observation system according to claim 4 , further comprising an analysis device that generates detection data for an observation target using the observation data at each of the observation positions read from the file server. The observation system according to claim 5, wherein
The observation system characterized in that the analysis device acquires position change and velocity of each observation position from the observation data at each observation position and detects landslide at each observation position. The observation system according to claim 5 or 6, wherein
An observation system, wherein the analysis device transmits a setting signal to the observation data relay device and the observation data transmission device.

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