JP2010220086A - Terminal device and monitor system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase speed in transmitting terminal station information to a monitoring device. <P>SOLUTION: A plurality of terminal devices each include: a communication section radio-transmitting and receiving command information and terminal station information; a storage section storing identification information indicating a direction in which the command information is received when the communication section receives the command information; an information processing section generating terminal station information in response to the command information; and a communication control section causing the communication section to transmit the terminal station information of the terminal device in a direction indicated by the identification information when the communication section receives the command information to the terminal device, causing the communication section to transmit command information when the communication section receives the command information to the other terminal device, and causing the communication section to transmit terminal station information of the other terminal device in a direction indicated by the identification information when the communication section receives the terminal station information of the other terminal device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal device and a monitoring system.

  In order to ensure the reliability of the power system, it is important to properly monitor facilities such as power plants, substations, transmission lines, and distribution lines. In particular, steel towers installed outdoors and transmission lines supported by such steel towers use various sensors such as weather sensors that detect weather conditions such as wind and snow and lightning strikes, and proximity sensors that detect the invasion of people and animals. Monitored.

  However, since the installation locations of the steel towers are dispersed and traffic is often inconvenient, for example, as shown in FIG. 11, the monitoring device 1 installed in the substation 2 and each steel tower Sn (1 ≦ n ≦ N), a monitoring system is used in which wireless communication is performed with a terminal device T-n (1 ≦ n ≦ N) installed in N) and information on each terminal is concentrated on the monitoring device 1. Further, for example, wireless communication is performed between adjacent devices using a wireless LAN of the IEEE 802.11 standard, for example, and multi-hop communication in which information is relayed and transmitted by a bucket relay method is performed. It is possible to communicate with the terminal device TN that is connected with low power.

  For example, in Patent Document 1, even if a communication failure occurs in any of the terminal devices that perform multi-hop communication as described above (wireless terminal station in Patent Document 1), the terminal of another terminal device An overhead power transmission line tower-based monitoring system that can concentrate station information (detection information in Patent Document 1) on monitoring devices (information collection stations in Patent Document 1) installed at both ends of a tower row is disclosed. Yes.

  In this way, by relaying and transmitting information between the monitoring device and each terminal device, it is possible to monitor equipment installed at a remote location with low power.

JP 2005-229715 A

  Here, an example of the configuration of a general monitoring device and a terminal device used in the monitoring system as shown in FIG. 11 is shown in FIGS. 9 and 10, respectively.

  In the general monitoring device 1 shown in FIG. 9, the information processing unit 10 causes the communication unit 11 to transmit command information CMD for the terminal device, and the communication unit 11 transmits the terminal information transmitted from each terminal device. Each time the station information INF is received, it is output to the information processing unit 10.

  In the general terminal station device shown in FIG. 10, the communication unit CM receives the command information CMD and outputs it to the communication control unit CN, and the information processing unit PR respectively detects the sensor S1 according to the command information CMD. The terminal information INF is generated from the measurement information D1 to D3 measured by S3, and the communication control unit CN transmits the terminal information INF from the communication unit CM. In parallel with the transmission of the terminal information INF corresponding to the received command information CMD, the terminal device receives the command information CMD for the other terminal devices and the terminal information INF of the other terminal devices. The data is relayed while being received and transmitted to an adjacent terminal device or monitoring device.

  However, in the terminal device shown in FIG. 10, when the monitoring device 1 uses the radio channel ch-A (ch-z = ch-A), all the terminal devices used in the monitoring system also use the radio channel ch-A. (Ch−n = ch−A) must be used, and radio interference may occur when a plurality of terminal devices simultaneously perform the relay transmission. In order to prevent the radio wave interference, for example, in the wireless LAN communication protocol of the IEEE 802.11 standard, medium access control of CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) system is performed. However, it cannot start its own transmission while detecting a transmission from another terminal device. Therefore, when the terminal information INF includes image information or audio information as in the case where a camera or a microphone is used as a part of the sensors S1 to S3 for detecting weather conditions or intrusions, Continuity may be impaired.

  In addition, since the transmission packets of the command information CMD and the terminal station information INF need to include communication path information indicating the above-described relay transmission order, in the monitoring system configured with many terminal stations, the communication path Information becomes big. Therefore, the ratio of image information and audio information included in the transmission packet of the terminal information INF is relatively small, and the amount of information that can be transmitted within a predetermined period is reduced. The sound quality will be degraded.

  A main aspect of the present invention that solves the above-described problems is a terminal device used in a monitoring system including a monitoring device and a plurality of terminal devices, a communication unit that wirelessly transmits and receives information, and the communication unit is the monitoring device A storage unit that stores identification information indicating a direction in which the command information is received, an information processing unit that generates terminal information according to the command information, and the communication unit When the command information for the terminal device is received, the terminal information of the terminal device is transmitted from the communication unit in the direction indicated by the identification information, and the communication unit transmits to the other terminal device. When the command information is received, the command information is transmitted from the communication unit. When the communication unit receives the terminal information of another terminal device, the other terminal device Before the terminal information is sent from the communication unit It is an end station apparatus characterized by having a communication control unit for transmitting in the direction indicated by the identification information.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  ADVANTAGE OF THE INVENTION According to this invention, the speed which transmits terminal station information to a monitoring apparatus can be improved.

It is a block diagram which shows the structure of the terminal station apparatus in 1st Embodiment of this invention. It is a figure explaining operation | movement of the whole monitoring system in 1st Embodiment of this invention. It is a flowchart explaining operation | movement of the terminal station apparatus in 1st Embodiment of this invention. It is a block diagram which shows the structure of the terminal station apparatus in 2nd and 3rd embodiment of this invention. It is a figure explaining operation | movement of the whole monitoring system in 2nd Embodiment of this invention. It is a flowchart explaining operation | movement of the terminal station apparatus in 2nd and 3rd embodiment of this invention. It is a figure explaining the structure and operation | movement of the whole monitoring system in 3rd Embodiment of this invention. It is a figure explaining an example of a structure and operation | movement of the whole monitoring system in which a branch exists. It is a block diagram which shows an example of a structure of a general monitoring apparatus. It is a block diagram which shows an example of a structure of a general terminal station apparatus. It is a block diagram which shows the example of application and schematic structure of the whole monitoring system.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

<First Embodiment>
=== Overall Configuration of Monitoring System ===
Hereinafter, with reference to FIG. 11, a schematic configuration of the entire monitoring system including the terminal device in the first embodiment of the present invention will be described.
The monitoring system shown in FIG. 11 is for intensively monitoring the state of each of the towers Sn including the plurality of towers S-1 to SN and the state around each tower Sn including the transmission lines in the substation 2. The system includes a monitoring device 1 and a plurality of terminal devices T-1 to TN.

  The substation 2 and the steel tower S-1 are adjacent to each other, and wireless communication is performed between the monitoring device 1 installed in the substation 2 and the terminal device T-1 installed in the steel tower S-1. Further, under the condition of 2 ≦ n ≦ N, the steel tower S- (n-1) and the steel tower Sn are adjacent to each other, and the terminal device T- (installed in the steel tower S- (n-1). n-1) and wireless communication are performed between the terminal equipment T-n installed in the steel tower Sn. The monitoring device 1 has the same configuration as the general monitoring device 1 shown in FIG. 9, for example. A detailed description of the configuration of the terminal device T-n will be given later.

=== Operation in the common mode of the entire monitoring system ===
Next, the operation of the entire monitoring system in the present embodiment will be described with reference to FIG. As described above, for example, an IEEE802.11 standard wireless LAN is used for wireless communication between devices. Further, the radio channel ch-A is used as the entire monitoring system.

Hereinafter, the operation in the common mode in which the monitoring device 1 transmits the common command information CMD for the terminal devices T-1 to TN will be described.
The monitoring device 1 transmits the command information CMD to the terminal device T-1, and the terminal device T-1 relays the command information CMD while receiving the command information CMD, and transmits it to the terminal device T-2. The terminal device T-2 relays the command information CMD while receiving it and transmits it to the terminal device T-3. The terminal device T-3 relays the command information CMD while receiving it. It transmits to apparatus T-4 (not shown).

  Similarly, the command information CMD is relayed while being received at each terminal device, and transmitted from the monitoring device 1 to the terminal device TN located most remotely. If the relay transmission of the command information CMD as described above is referred to as DL (downlink) communication, the order of DL communication is based on the communication route information when the command information CMD includes the communication route information. Determined.

  On the other hand, the terminal device T-1 generates terminal information INF from the measurement information of the tower (S-1) and sensors (not shown) installed around the tower S-1 according to the received command information CMD, and the monitoring device 1 Send to. Further, the terminal station device T-2 generates the terminal station information INF in the same manner as the terminal station device T-1 and transmits it to the terminal station device T-1, and the terminal station device T-1 -2 terminal station information INF is received and relayed, and transmitted to monitoring device 1.

  Similarly, the terminal station information INF transmitted from each of the terminal station apparatuses T-1 to T-N is relayed while being received at each terminal station apparatus, and transmitted to the monitoring apparatus 1 in the order opposite to the DL communication order. Is done. If the relay transmission of the terminal information INF as described above is referred to as UL (uplink) communication, each terminal information INF does not include communication path information indicating the order of UL communication, and the order of UL communication. Is determined by a method to be described later.

  In this way, the common command information CMD transmitted from the monitoring device 1 is relayed (DL communication) to the terminal station device TN while being received at each terminal device, and according to the received command information CMD. The terminal station information INF sequentially transmitted from each terminal apparatus is relayed (UL communication) to the monitoring apparatus 1. Therefore, when the monitoring device 1 transmits the command information CMD common to the terminal devices T-1 to T-N once, the monitoring device 1 distributes the terminal information INF of the terminal devices T-1 to T-N N times in this order. Will be received.

=== Operation of the entire monitoring system in single mode ===
Hereinafter, the operation in the single mode in which the monitoring device 1 transmits the command information CMD for any one of the terminal devices T-1 to TN will be described. Here, as an example, the operation when the monitoring device 1 transmits the command information CMD for the specific terminal device T-n will be described.

  The terminal station devices T-1 to T- (n-1) operate in the same manner as in the common mode in DL communication, and the command information CMD is relayed while being received by each terminal device. It is transmitted to the station device T-n. However, the terminal device T-1 to T- (n-1) determines that the received command information CMD is not for itself and does not generate the terminal information INF.

  On the other hand, the terminal device T-n determines that the received command information CMD is only for itself and not for other terminal devices, and generates terminal information INF. DL communication to (n + 1) is not performed. Therefore, the command information CMD is not transmitted to the terminal equipment T- (n + 1) to TN, and the terminal equipment T- (n + 1) to TN does not generate the terminal information INF.

  In this way, the command information CMD transmitted from the monitoring device 1 for the terminal device T-n is relayed (DL communication) to the terminal device T-n while being received at each terminal device, and the received command is received. Only the terminal station device T-n transmits the terminal station information INF according to the information CMD. Further, the terminal station information INF of the terminal station device T-n is relayed (UL communication) to the monitoring device 1 as in the common mode. Accordingly, when the monitoring device 1 transmits the command information CMD for the specific terminal device Tn once, the monitoring device 1 receives the terminal information INF of the terminal device Tn once.

  Note that the monitoring system according to the present embodiment has a plurality of modes in which the monitoring device 1 transmits command information CMD for a plurality of terminal devices among the terminal devices T-1 to T-N, in addition to the common mode and the single mode. You may have. In the multiple mode, each terminal device operates in substantially the same manner as in the single mode, generates terminal information INF when it determines that the received command information CMD is for itself, and receives the received command information CMD. Is determined to be for another terminal device, DL communication is performed.

=== Configuration of Terminal Station Device ===
Hereinafter, with reference to FIG. 1, the structure of the terminal station apparatus in this embodiment is demonstrated.
The terminal device T-n shown in FIG. 1 is one of a plurality of terminal devices T-1 to TN used together with the general monitoring device 1 shown in FIG. 9 in the monitoring system, for example. Yes, and includes a communication unit CM, a communication control unit CN, a storage unit ME, an information processing unit PR, and sensors S1 to S3. Note that each terminal device has one or more sensors as appropriate according to the installation location, equipment, etc., but in FIG. 1, for convenience of explanation, three sensors S1 to S3 are shown. In addition, since the terminal device T-n in the present embodiment is suitable when the terminal information INF includes image information and audio information, a camera is used as the sensor S3 as an example.

  The communication unit CM has an antenna for transmitting and receiving radio signals. The communication control unit CN is configured as a logic circuit such as an FPGA (Field Programmable Gate Array), and receives command information CMD and terminal information INF with the communication unit CM. The identification information t described later is input / output to / from the storage unit ME. Further, the information processing unit PR is constituted by, for example, a microcomputer having a function of a CPU (Central Processing Unit), and inputs / outputs command information CMD and terminal information INF to / from the communication control unit CN. is doing. The measurement information D1 to D3 output from the sensors S1 to S3, respectively, are all input to the information processing unit PR.

=== Operation in Common Mode of Terminal Station Device ===
Next, with reference to FIG. 1 and FIG. 3, operation | movement of the terminal station apparatus in this embodiment is demonstrated. In FIG. 3, the processing in the communication control unit CN and the processing in the communication unit CM and the storage unit ME controlled by the communication control unit CN are arranged on the left side of the alternate long and short dash line, and the processing in the information processing unit PR and the information processing The processes in the sensors S1 to S3 controlled by the part PR are arranged on the right side of the alternate long and short dash line.

Hereinafter, the operation in the common mode will be described. Note that the command information CMD in the common mode is not only for the terminal device T-n itself, but also for other than the terminal device T-n (other terminal devices).
When receiving the command information CMD, the communication unit CM outputs the command information CMD to the communication control unit CN (S10).

  Next, the communication control unit CN determines that the input information is the command information CMD based on, for example, header information (S11: CMD), and outputs the command information CMD to the information processing unit PR, and the command information CMD. Finally, that is, the identification information t indicating the monitoring device or the terminal device transmitted immediately before the terminal device T-n receives is stored in the storage unit ME (S12t). For example, in FIG. 2, the identification information t indicates the terminal device T-2 when n = 3, and indicates the monitoring device 1 when n = 1. Hereinafter, for convenience of explanation, a monitoring device or a terminal device indicated by the identification information t is generally expressed as a device T-t. The identification information t can be extracted from the communication path information included in the command information CMD. Further, in S14t described later, for example, the identification information t can be extracted from the header information by adding the identification information t to the header information and transmitting the command information CMD.

  Next, the information processing unit PR determines that the input command information CMD is for (other than) the terminal device Tn (S23: YES), and the communication control unit CN adds the command information CMD to the command information CMD. The command information CMD is transmitted from the communication unit CM based on the included communication path information (S14t).

  Next, the information processing unit PR determines that the input command information CMD is for the terminal device T-n itself (S25: YES), and determines the sensor S1 to S3 according to the command information CMD. Is measured / detected, terminal information INF is generated from the measured / detected measurement information D1 to D3, and is output to the communication control unit CN (S26).

  Finally, the communication control unit CN transmits the input terminal station information INF from the communication unit CM to the device T-t (S17t), and ends the process according to the command information CMD for the terminal station device T-n itself. (S19).

  On the other hand, when the communication unit CM receives the terminal information INF other than the terminal device T-n, the communication unit CM outputs the terminal information INF to the communication control unit CN (S10), and the communication control unit CN receives the input information. Is determined to be the terminal station information INF (S11: INF), the terminal station information INF is transmitted from the communication unit CM to the apparatus T-t (S18t), and the terminal station information INF other than the terminal station apparatus T-n The relay transmission process is terminated (S19).

  In this way, in the common mode, the terminal device T-n performs DL communication in which the command information CMD is transmitted from the communication unit CM based on the communication path information included in the command information CMD, and includes the command information CMD. The terminal station information INF generated accordingly or the terminal station information INF other than the terminal station device Tn is transmitted from the communication unit CM to the device Tt. It is also possible to prevent the terminal device TN located most remote from the monitoring device 1 from performing further DL communication.

  Further, as shown in S17t and S18t of FIG. 3, in the terminal device T-n of the present embodiment, the other party that performs UL communication is always immediately before the terminal device T-n receives the command information CMD. It is the transmitted device T-t. Therefore, the terminal station information INF and the transmission packet of the terminal station information INF do not need to include communication path information, respectively, and increase the amount of UL communication information that can be transmitted within a predetermined period. Transmission speed (speed at which the terminal information INF is transmitted to the monitoring device 1) can be improved.

=== Operation of terminal device in single mode ===
Hereinafter, an operation when the command information CMD is for only the terminal device T-n in the single mode will be described.

When receiving the command information CMD, the communication unit CM outputs the command information CMD to the communication control unit CN (S10).
Next, the communication control unit CN determines that the input information is command information CMD (S11: CMD), outputs the command information CMD to the information processing unit PR, and outputs the command information CMD to the terminal device T. The storage unit ME stores the identification information t indicating the monitoring device or the terminal device transmitted immediately before -n is received (S12t).

Next, since the information processing unit PR determines that the input command information CMD is not for the terminal device T-n (S23: NO), the communication control unit CN does not perform further DL communication.
Next, the information processing unit PR determines that the input command information CMD is for the terminal device T-n itself (S25: YES), and determines the sensor S1 to S3 according to the command information CMD. Is measured / detected, terminal information INF is generated from the measured / detected measurement information D1 to D3, and is output to the communication control unit CN (S26).

  Finally, the communication control unit CN transmits the input terminal station information INF from the communication unit CM to the device T-t (S17t), and ends the process according to the command information CMD for the terminal station device T-n itself. (S19).

  On the other hand, since the command information CMD is only for the terminal device Tn, the communication unit CM does not receive the terminal information INF other than the terminal device Tn, and the communication control unit CN The relay transmission processing of the terminal station information INF other than the station device T-n is not performed.

Next, the operation when the command information CMD is for any one of the terminal device T- (n + 1) to TN in the single mode will be described.
When receiving the command information CMD, the communication unit CM outputs the command information CMD to the communication control unit CN (S10).

  Next, the communication control unit CN determines that the input information is command information CMD (S11: CMD), outputs the command information CMD to the information processing unit PR, and outputs the command information CMD to the terminal device T. The storage unit ME stores the identification information t indicating the monitoring device or the terminal device transmitted immediately before -n is received (S12t).

  Next, the information processing unit PR determines that the input command information CMD is for other than the terminal device T-n (S23: YES), and the communication control unit CN performs communication included in the command information CMD. Based on the path information, command information CMD is transmitted from the communication unit CM (S14t).

  Next, since the information processing unit PR determines that the input command information CMD is not for the terminal device T-n itself (S25: NO), the information processing unit PR does not perform processing according to the command information CMD (S19). .

  On the other hand, when the communication unit CM receives the terminal information INF other than the terminal device T-n, the communication unit CM outputs the terminal information INF to the communication control unit CN (S10), and the communication control unit CN receives the input information. Is determined to be the terminal station information INF (S11: INF), the terminal station information INF is transmitted from the communication unit CM to the apparatus T-t (S18t), and the terminal station information INF other than the terminal station apparatus T-n The relay transmission process is terminated (S19).

  In the single mode, when the command information CMD is for any one of the terminal station devices T-1 to T- (n-1), the terminal device does not perform further DL communication. The communication unit CM does not receive the command information CMD and the terminal station information INF, and the terminal station device T-n does not start the processing shown in FIG.

  In this way, in the single mode as well as in the common mode, the terminal device T-n generates the terminal information INF when it receives the command information CMD for the terminal device T-n itself, and performs communication. When UL communication is performed from the unit CM to the device T-t, and when the command information CMD for the device other than the terminal device T-n is received, the DL communication is performed, and the terminal information INF other than the terminal device T-n is received In addition, UL communication is performed from the communication unit CM to the apparatus T-t.

  Even in the plurality of modes, the terminal device T-n operates in substantially the same manner as in the single mode. However, in S23 of FIG. 3, the information processing section PR determines that the inputted command information CMD is always for other than the terminal device T-n (YES) as in the common mode (YES). . For this reason, unnecessary DL communication may be performed as a whole of the monitoring system, but the terminal station information INF is generated according to the command information CMD. Therefore, unnecessary UL communication is not performed, and the transmission speed of the terminal station information INF. Is not affected. Further, in S14t of FIG. 3, it is possible to prevent the communication control unit CN from performing unnecessary DL communication based on the communication path information included in the command information CMD.

<Second Embodiment>
=== Configuration and Operation of Entire Monitoring System ===
The overall configuration of the monitoring system according to the second embodiment of the present invention is substantially the same as the overall configuration of the monitoring system according to the first embodiment. However, as will be described later, the communication unit of each terminal device includes two transmission / reception units that use different radio channels, and the entire monitoring system has three radio channels ch-A, ch-B, and ch- C is used.

Next, the operation of the entire monitoring system in the present embodiment will be described with reference to FIG.
First, the operation in the common mode will be described.
The monitoring device 1 transmits the command information CMD to the terminal device T-1 using the radio channel ch-A, and the terminal device T-1 receives the command information CMD using the radio channel ch-A. Then, the data is relayed and transmitted to the terminal device T-2 using the radio channel ch-B. Also, the terminal station device T-2 uses the radio channel ch-B to receive and relay the command information CMD, and uses the radio channel ch-C to transmit to the terminal station device T-3. The device T-3 uses the radio channel ch-C to receive and relay the command information CMD, and transmits the command information CMD to the terminal station device T-4 (not shown) using the radio channel ch-A.

  Similarly, the command information CMD is relayed while being received at each terminal device, and transmitted from the monitoring device 1 to the terminal device TN located most remotely. The radio channels ch-N1 and ch-N2 used by the terminal station device TN are set according to the radio channel used by the adjacent terminal device T- (N-1) for DL communication.

  On the other hand, the terminal device T-1 generates terminal information INF from measurement information of the tower (S-1) and sensors (not shown) installed around it in accordance with the received command information CMD, and transmits the radio channel ch. -Send to monitoring device 1 using A. Further, the terminal station device T-2 generates the terminal station information INF in the same manner as the terminal station device T-1, and transmits the terminal station information INF to the terminal station device T-1 using the radio channel ch-B. −1 uses the radio channel ch-A to relay the terminal station information INF of the terminal station T-2 while receiving it, and transmits it to the monitoring apparatus 1 using the radio channel ch-A.

  Similarly, the terminal station information INF transmitted from each of the terminal station apparatuses T-1 to T-N is relayed while being received at each terminal station apparatus, and transmitted to the monitoring apparatus 1 in the order opposite to the DL communication order. Is done. Similarly to the monitoring system of the first embodiment, each terminal information INF does not include communication path information indicating the order of UL communication, and the order of UL communication is determined by a method described later.

  In this way, similar to the monitoring system of the first embodiment, the common command information CMD transmitted from the monitoring device 1 is relayed to the terminal device TN while being received at each terminal device (DL communication). The terminal information INF sequentially transmitted from each terminal device according to the received command information CMD is relayed (UL communication) to the monitoring device 1.

  Note that the single mode and the plurality of modes also operate in the same manner as in the first embodiment except for the setting of the radio channel used for DL communication and UL communication between adjacent devices.

  As shown in FIG. 5, in the monitoring system of this embodiment, the radio channels used for DL communication and UL communication between adjacent devices are ch-A, ch-B, ch-C, and ch-A. It is set repeatedly in the order of ... Therefore, by setting the three radio channels ch-A, ch-B, and ch-C to radio channels that do not cause radio wave interference with each other, a plurality of terminal devices can simultaneously perform DL communication or UL communication. And the transmission speed of the terminal information INF can be improved. As an example, when an IEEE802.11b standard wireless LAN is used for DL communication and UL communication, wireless channels 1ch, 6ch, and 11ch that do not cause radio wave interference with each other can be used as the three wireless channels.

=== Configuration and Operation of Terminal Station Device ===
Hereinafter, the configuration of the terminal device in the present embodiment will be described with reference to FIG.
4 is one of a plurality of terminal stations T-1 to T-N used together with the general monitoring apparatus 1 shown in FIG. 9 in the monitoring system, for example. Yes, and includes a communication unit CM, a communication control unit CN, a storage unit ME, an information processing unit PR, and sensors S1 to S3.

  The communication unit CM includes transmission / reception units C1 and C2 each having an antenna for transmitting / receiving a radio signal. Further, the communication control unit CN inputs / outputs command information CMD and terminal information INF between the transmission / reception units C1 and C2, and inputs / outputs identification information m described later with the storage unit ME. Furthermore, the information processing unit PR inputs and outputs command information CMD and terminal information INF with the communication control unit CN. The measurement information D1 to D3 output from the sensors S1 to S3, respectively, are all input to the information processing unit PR.

  Next, with reference to FIG. 4 and FIG. 6, operation | movement of the terminal station apparatus in this embodiment is demonstrated. The transceivers C1 and C2 use different radio channels ch-n1 and ch-n2, respectively. In this embodiment, the radio channels ch-n1 and ch-n2 are the above-described three radio channels ch- Any two of A, ch-B, and ch-C.

First, the operation in the common mode will be described.
When receiving the command information CMD, the transmission / reception unit C1 or C2 outputs the command information CMD to the communication control unit CN (S10).
Next, the communication control unit CN determines that the input information is command information CMD (S11: CMD), outputs the command information CMD to the information processing unit PR, and receives and transmits the command information CMD. Is stored in the storage unit ME (S12m). The identification information m may be 1-bit information represented by 0 or 1, but in the present embodiment, for convenience of explanation, the transmission / reception unit C1 is shown when m = 1, and when m = 2. The transmission / reception unit C2 is indicated, and the transmission / reception unit indicated by the identification information m is expressed as Cm.

  Next, the information processing unit PR determines that the input command information CMD is for (other than) the terminal device T-n (S23: YES), and the communication control unit CN is not the transmission / reception unit Cm. The command information CMD is transmitted from the other transmitting / receiving unit (S14m). When the command information CMD includes communication path information, the communication control unit CN determines a transmission / reception unit that performs DL communication with the terminal device to which the command information CMD is to be transmitted next based on the communication path information. The command information CMD may be transmitted from the transmission / reception unit.

  Next, the information processing unit PR determines that the input command information CMD is for the terminal device T-n itself (S25: YES), and determines the sensor S1 to S3 according to the command information CMD. Is measured / detected, terminal information INF is generated from the measured / detected measurement information D1 to D3, and is output to the communication control unit CN (S26).

  Finally, the communication control unit CN transmits the input terminal station information INF from the transmission / reception unit Cm (S17m), and ends the process according to the command information CMD for the terminal station device T-n itself (S19).

  On the other hand, when the transmission / reception unit C1 or C2 receives the terminal station information INF other than the terminal station device T-n, the transmission / reception unit C1 or C2 outputs the terminal station information INF to the communication control unit CN (S10), and the communication control unit CN is input. Information is determined to be terminal station information INF (S11: INF), the terminal station information INF is transmitted from the transceiver Cm (S18m), and relay transmission processing of terminal station information INF other than the terminal station device T-n is performed. Is finished (S19).

  In this way, in the common mode, the terminal device T-n receives the command information CMD from the transmission / reception unit that is not the transmission / reception unit Cm, or the transmission / reception unit determined based on the communication path information included in the command information CMD. In addition to performing DL communication to be transmitted, UL communication is performed in which the terminal information INF generated according to the command information CMD or the terminal information INF other than the terminal device T-n is transmitted from the transmission / reception unit Cm. When the command information CMD includes communication path information, it is possible to prevent the terminal device TN located most remote from the monitoring device 1 from performing further DL communication.

  Further, as shown in S17m and S18m of FIG. 6, in the terminal device T-n of the present embodiment, the transmission / reception unit that performs UL communication is the transmission / reception unit Cm that always receives the command information CMD. Therefore, the terminal station information INF and the transmission packet of the terminal station information INF do not need to include communication path information, respectively, and increase the amount of UL communication information that can be transmitted within a predetermined period. The transmission speed can be improved.

  In the single mode and the plurality of modes, as in the case of the common mode, the terminal device T-n generates the terminal information INF when receiving the command information CMD for the terminal device T-n itself. When performing UL communication from the transmission / reception unit Cm, when receiving command information CMD for a device other than the terminal device T-n, DL communication is performed, and when receiving terminal information INF other than the terminal device T-n, the transmission / reception unit Cm To perform UL communication.

<Third Embodiment>
=== Configuration and Operation of Entire Monitoring System ===
The overall configuration of the monitoring system according to the third embodiment of the present invention is substantially the same as the overall configuration of the monitoring system according to the second embodiment. However, as a whole monitoring system, in the second embodiment, three radio channels ch-A, ch-B, and ch-C are used as shown in FIG. In FIG. 7, only two radio channels ch-A and ch-B are used. Therefore, in the monitoring system of the present embodiment, for example, the transmission / reception unit of the terminal device T-1 that performs wireless communication with the monitoring device 1 and the transmission / reception unit of the terminal device T-2 that performs wireless communication with the terminal device T-3. As described above, since adjacent terminal devices have transmission / reception units that use the same radio channel, radio wave interference may occur between the transmission / reception units.

  However, in the monitoring system of the power transmission system as shown in FIG. 11, the adjacent steel towers on which the overhead power transmission lines are installed are within the line of sight, but are separated by several hundred meters to several kilometers, so that the monitoring device 1 and A highly directional antenna is used for the transmission / reception unit of each terminal device. Therefore, by adjusting the direction of each antenna so that the antennas of the transmission / reception units that should perform direct DL communication and UL communication face each other, and the antennas of the two transmission / reception units of each terminal device face different directions, It is possible to prevent radio wave interference between transmission / reception units that use the same radio channel.

  Note that the operation of the entire monitoring system in the present embodiment is the same as the operation of the entire monitoring system of the second embodiment, except for the setting of radio channels used for DL communication and UL communication between adjacent devices.

  As described above, when the terminal device T-n stores the identification information indicating the direction in which the communication unit CM receives the command information CMD and receives the command information CMD for the terminal device T-n itself, Information INF is generated and UL communication is performed in the direction indicated by the identification information. When command information CMD is received for devices other than the terminal device T-n, DL communication is performed, and terminal information INF other than the terminal device T-n is transmitted. When the UL communication is performed in the direction indicated by the identification information when the terminal information is received, the communication path information of the terminal information INF becomes unnecessary, and the transmission speed can be improved.

  Further, by storing the identification information t indicating the monitoring device or the terminal device that last transmitted the command information CMD (immediately before it is received by the terminal device T-n), the communication path information is included in the terminal information INF. It is possible to determine the other party that performs the UL communication as the apparatus T-t without.

  In addition, the communication unit CM includes transmission / reception units C1 and C2 that use different radio channels, and by storing identification information m indicating the transmission / reception unit that has received the command information CMD, the communication path information is included in the terminal information INF. It is possible to determine the transmission / reception unit that performs UL communication without any change as the transmission / reception unit Cm. Furthermore, it becomes possible for a plurality of terminal devices to perform DL communication or UL communication simultaneously, and the transmission speed of the terminal information INF can be improved.

  In addition, when command information CMD for devices other than the terminal device T-n is received, unnecessary DL communication can be prevented by performing DL communication based on communication path information included in the command information CMD.

  In addition, when command information CMD for devices other than the terminal device T-n is received, the command information CMD has no communication path information by performing DL communication from the transmitting / receiving unit that is not the transmitting / receiving unit Cm. However, DL communication can be performed without affecting the transmission speed in UL communication.

  Further, by configuring the communication control unit CN as a logic circuit with an FPGA or the like, it is necessary to increase the speed of the relay transmission process of the command information CMD and the terminal information INF, and for the monitoring device 1 to receive the terminal information INF. Time can be shortened.

  Further, in the monitoring system including the monitoring device 1 and the plurality of terminal devices T-1 to TN, by using the terminal device T-n as shown in FIG. 1 or FIG. 4 as each terminal device. The communication speed information is not required in the UL communication, and the transmission speed can be improved. Further, among the relay transmission processes in the terminal station device T-n, the relay process by the communication control unit CN is performed according to the communication protocol of the application layer as shown in FIG. 3 and FIG. The number of relay transmission stages can be increased regardless of the lower layer communication protocol restriction.

  Moreover, by installing the terminal devices T-1 to TN in the steel towers S-1 to SN, respectively, the state of each steel tower Sn and the state around each steel tower Sn including the power transmission line can be changed. The monitoring can be centrally performed at the substation 2 where the monitoring device 1 is installed.

  In addition, by performing relay transmission processing of the terminal station information INF including image information and audio information in the terminal station device T-n, it is possible to improve image quality and sound quality without impairing real-time characteristics and continuity.

  Further, the communication unit CM of each terminal device includes transmission / reception units C1 and C2 that use different radio channels, and ch-A, ch-B are used as radio channels used for DL communication and UL communication between adjacent devices. , And ch-C are repeatedly set in this order, so that a plurality of terminal devices can simultaneously perform DL communication or UL communication, and the transmission speed of the terminal information INF can be improved.

  In addition, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention.

  In the said embodiment, although monitoring systems, such as a steel tower and a power transmission line, were shown in FIG. 11 as an application example of terminal unit TN, it is not limited to this. The terminal device T-n includes a plurality of terminal devices, and can be applied to a monitoring system in which information is relayed between the monitoring device and each terminal device. In addition to the power system monitoring system, It can also be applied to gas and water system monitoring systems.

  In the above embodiment, as shown in FIGS. 2, 5, and 7, the communication path for DL communication and UL communication is such that the monitoring device 1 and each terminal device are arranged in a line, but is not limited thereto. It is not something. As an example, FIG. 8 shows a configuration of a monitoring system in which a branch from the terminal station device T-3 in FIG. 2 exists. The monitoring system shown in FIG. 8 branches from the terminal device T-3 to a column after the terminal device T-14 and a column after the terminal device T-24, thereby forming a network having a tree structure. ing. When the monitoring system having a branch from the terminal station device T-3 in FIG. 5 is configured as a network having the same structure as in FIG. 8, the terminal device T-3 uses the radio channel ch-A. Wireless communication is performed between the terminal devices T-14 and T-24, and the wireless channels used by the terminal devices in the two columns are set in the same manner.

DESCRIPTION OF SYMBOLS 1 Monitoring apparatus 2 Substation 10 Information processing part 11 Communication part Sn (1 <= n <= N) Steel tower Tn (1 <= n <= N) Terminal station CM communication part C1, C2 Transmission / reception part CN Communication control part ME Storage unit PR Information processing unit S1, S2, S3 Sensor

Claims (10)

A terminal device used in a monitoring system including a monitoring device and a plurality of terminal devices,
A communication unit that wirelessly transmits and receives information;
A storage unit that stores identification information indicating a direction in which the command information is received when the communication unit receives the command information transmitted from the monitoring device;
An information processing unit for generating terminal information according to the command information;
When the communication unit receives the command information for the terminal device, the terminal information of the terminal device is transmitted from the communication unit in a direction indicated by the identification information, and the communication unit transmits to the other terminal. When the command information for a station device is received, the command information is transmitted from the communication unit, and when the communication unit receives the terminal information of another terminal device, the other terminal station A communication control unit that transmits the terminal information of the device in the direction indicated by the identification information from the communication unit;
The terminal device characterized by having. The identification information includes information indicating the monitoring device or other terminal device that last transmitted the command information,
The terminal device according to claim 1, wherein the communication control unit causes the terminal device information to be transmitted from the communication unit to the monitoring device or another terminal device indicated by the identification information. The communication unit includes first and second transmission / reception units that use different radio channels,
The identification information includes information indicating a transmission / reception unit that has received the command information among the first and second transmission / reception units,
The terminal device according to claim 1, wherein the communication control unit causes the terminal information to be transmitted from a transmission / reception unit indicated by the identification information.   The communication control unit causes the communication unit to transmit the command information based on communication path information included in the command information when the communication unit receives the command information for another terminal device. The terminal device according to any one of claims 1 to 3, characterized in that:   When the first or second transmission / reception unit receives the command information for another terminal device, the communication control unit receives the command information from a transmission / reception unit that is not the transmission / reception unit indicated by the identification information. The terminal device according to claim 3, wherein the terminal device is transmitted.   The terminal apparatus according to any one of claims 1 to 5, wherein the communication control unit includes an FPGA. A plurality of terminal devices;
A monitoring device for transmitting command information for the plurality of terminal devices and receiving terminal information transmitted from the plurality of terminal devices;
With
The plurality of terminal devices are:
A communication unit that wirelessly transmits and receives the command information and the terminal information;
A storage unit that stores identification information indicating a direction in which the command information is received when the communication unit receives the command information;
An information processing unit that generates the terminal information according to the command information;
When the communication unit receives the command information for the terminal device, the terminal information of the terminal device is transmitted from the communication unit in a direction indicated by the identification information, and the communication unit transmits to the other terminal. When the command information for a station device is received, the command information is transmitted from the communication unit, and when the communication unit receives the terminal information of another terminal device, the other terminal station A communication control unit that transmits the terminal information of the device in the direction indicated by the identification information from the communication unit;
And a monitoring system. The plurality of terminal devices are each installed on a steel tower that supports a power transmission line,
The monitoring system according to claim 7, wherein the terminal station information is a state of the transmission line, a state of the steel tower, a state around the steel tower, or a combination thereof.   The monitoring system according to claim 7 or 8, wherein the terminal information includes at least one of image information and audio information. The plurality of terminal devices are:
A first terminal device comprising first and second transmission / reception units, wherein the communication unit uses a first radio channel and a second radio channel, respectively;
A second terminal device comprising first and second transmission / reception units in which the communication unit uses the second radio channel and the third radio channel, respectively;
A third terminal device comprising first and second transmission / reception units, wherein the communication unit uses the third radio channel and the first radio channel, respectively;
Including
The command information and the terminal information are
The first and second terminal devices are transmitted and received using the second radio channel,
The second and third terminal devices are transmitted and received using the third radio channel,
The monitoring system according to any one of claims 7 to 9, wherein transmission and reception are performed between the third and first terminal devices using the first wireless channel.

Images