JP4217635B2 - Overhead power transmission line tower base monitoring system - Google Patents

Description

  The present invention detects the state of the tower group of the transmission line tower row constituting the overhead power transmission path by the detection means installed in each tower, and wirelessly transmits the detection information of this group to the information collection station, The present invention relates to an overhead power transmission line tower-based monitoring system that remotely monitors the status of each tower.

  In the transmission line towers that make up the overhead power transmission line, there are situations in which the surrounding safety and accident-free transmission may be hindered, such as weather conditions such as lightning, wind, ice and snow, abnormal occurrences such as human destruction, etc. It is necessary to monitor constantly by group. However, there are many places where the transmission line towers are inconvenient for transportation. Therefore, for example, as disclosed in Patent Document 1, a system for remotely monitoring the status of each steel tower by wireless communication has been proposed. This remote monitoring system detects the status of each tower using detection means installed for each tower, and collects detection information for each tower by a specific information collection station (monitoring station) by wireless transmission. .

In the above system, as shown in FIG. 7, detection information for each tower group is detected between adjacent towers by wireless terminal stations (7-1 to 7-2) installed in each tower (1-1 to 1-n). By wireless communication, the data is relayed sequentially in the direction in which the towers are arranged, and transmitted to the information collecting station 82 at the tower row end. According to such a relay transmission method, wireless transmission from each tower (1-1 to 1-n) to the monitoring station 82 can be performed only with weak radio waves such as specific low-power radio. The weak radio waves specified in specific low-power radio, etc. have a narrow communication area, but there is no unnecessary expansion of the radio area, and the possibility of interference interference is low, requiring complicated and complicated permission procedures. There is an advantage that it can be used easily. In addition, the small wireless transmission output is advantageous in reducing the size, cost and power consumption of the wireless terminal station.
JP-A-7-107634

However, it has been found that the above-described conventional technique has the following problems.
That is, the relay transmission method described above is established on the assumption that all the wireless terminal stations (7-1 to 7-n) in the transmission line tower train operate normally, as shown in FIG. ing. Temporarily, as shown in (b) of the figure, at the wireless terminal station (7-3) installed in any one of the towers (1-3) in the tower row, When a communication failure occurs, relay transmission is interrupted there. In this situation, many parts of the tower train that is being monitored become unmonitorable.

  Therefore, as shown in (b) of the figure, the present inventors cause a failure when a communication failure occurs in any of the wireless terminal stations (7-3) in the tower row. A system for performing wireless relay transmission by skipping the wireless terminal (7-3) was studied. However, in order to perform the interlaced relay, it is necessary to increase the radio transmission output of the radio terminal stations (7-1 to 7-n) of each tower. If the wireless transmission output is increased, the communication area is expanded, but the possibility of occurrence of interference interference and the like increases due to the unnecessary expansion of the wireless area. In addition, because large output radio waves are outside the range of weak radio waves specified by specific low-power radio, special permission procedures are required for their use, and usage is restricted in some areas. Sometimes.

  Even if the transmission output of the wireless terminal stations (7-1 to 7-n) is increased, as shown in (c) of the figure, the wireless terminal station (7-3) located at the top of a mountain or mountain pass. When a failure occurs, the two wireless terminal stations (7-2 and 7-5) located before and after that are out of line of sight and cannot perform the interlaced relay. The frequency band of weak radio waves assigned to specific low-power radio or Bluetooth (trademark name) is UHF (ultra-short wave) or SHF (microwave), which has a strong straightness, so that direct waves outside the line of sight It cannot be used for communication.

  The present invention has been made in view of the technical background as described above. The purpose of the present invention is to specify a specific low power even when a communication failure occurs in any of the towers in the tower row to be monitored. It is an object of the present invention to provide a technique that enables accurate and continuous remote monitoring of the status of each steel tower including the failure of the above-mentioned wireless terminal station only by wireless communication within the weak radio wave range defined in the above.

The means of the present invention detects the status of the steel tower grouping of the transmission line tower row constituting the overhead power transmission path by the detecting means installed in each steel tower, and the detection information of the base is a wireless terminal installed in each steel tower. Overhead transmission line tower-based monitoring system that remotely monitors the status of each tower by relaying to the information collecting station at the end of the tower row by relaying in the direction of the tower tower by wireless communication between adjacent towers by the station In the normal state in which information collection stations are installed at both ends of the steel tower row and any of the wireless terminal stations of each tower is capable of relay transmission by wireless communication between adjacent stations, the detection information at each steel tower is transferred to the tip of the steel tower row. The information collection station on the rear end side collects detection information at each tower by forming a unidirectional wireless relay route that transmits from the rear end to the rear end. Failures that prevent relay transmission If occurs, to form a two-way radio relay route going from the wireless terminal station before and caused the fault to the front end and the rear end of the steel tower column, the radio relay route toward the tip, on the radio relay route Information detected at each tower is collected at the information collection station on the front end side, and the detection information at each tower on the wireless relay route is collected at the information collection station on the rear end side by the wireless relay route toward the rear end. It is characterized by collecting .

It is preferable to add the following means to the above means.
Each of the radio terminal stations of each tower includes means for adding detection information at the own tower to the information wirelessly received from the adjacent station and wirelessly transmitting the additional information to the adjacent station on the opposite side of the adjacent station.

  In addition, when the radio reception from the adjacent station on the front side of the tower is interrupted after a predetermined time, the radio terminal station of each tower sends information to that effect to the rear of the tower. Means for periodically wirelessly transmitting to an adjacent station, and means for wirelessly transmitting information to that effect to the front adjacent station of the own tower when wireless transmission to the rear adjacent station of the own tower has become impossible Is provided.

  Each wireless terminal of each tower has storage means for retrospectively accumulating detection information in the own tower, and the stored information in this storage means is accessed to a specific wireless terminal via the wireless terminal of the own tower. Control means are provided.

  Each tower has multiple types of sensors that detect the status of the own tower and sensor abnormality detection means that individually detects the abnormality of each sensor, and the detection contents of this sensor abnormality detection means are detected by the own tower. A means for transmitting the information included in the information is provided.

  Each wireless terminal station constitutes a packet communication terminal that transmits information by wireless transmission and reception of packet data.

  Even if communication failure occurs on any of the towers in the tower row to be monitored, failure of the above wireless terminal station can be achieved only by wireless communication within the range of weak radio waves defined by specific low power. It is possible to remotely and accurately monitor the status of each tower including

  FIG. 1 shows an outline of an overhead transmission line tower-based monitoring system to which the technology of the present invention is applied. As shown in the figure, in the system of the present invention, first, each of the towers (1-1 to 1-n) of the transmission line tower row constituting the overhead power transmission path is respectively connected to the radio terminal stations (2-1 to 2- n) is installed. Each wireless terminal station (2-1 to 2-n) is configured to perform bidirectional wireless data communication using weak radio waves in a frequency band (UHF or SHF) assigned to a specific low-power wireless device or the like. ing. In wireless data communication, packet data of a predetermined format is exchanged.

  Each of the towers (1-1 to 1-n) is provided with detection means for detecting the status of the own tower along with the wireless terminals (2-1 to 2-n). Each detection means includes, for example, CT, Rogowski coil, magnetic sensor, strain gauge, various weather sensors such as temperature sensor, humidity sensor and anemometer, acoustic sensor (audible sound and ultrasonic wave), vibration sensor, accelerometer, Using multiple types of sensors such as light sensors, current detectors, and human sensors, detect abnormalities such as lightning damage, beast damage, wind damage, ice / snow damage, man-made destruction, heavy machinery approach, etc. . The detection result is converted into binary digital information and output.

  The detection information for each tower based on the detection stage is obtained by wireless communication between adjacent towers by the wireless terminal stations (2-1 to 2-2) installed in each tower. Relay transmission is performed sequentially in the line-up direction. The detection information of each tower is digitized data, which is wirelessly transmitted in a predetermined packet format.

  Information collecting stations 31 and 32 are installed at both ends of the tower row to be monitored. The information collection station 31 installed at the front end side of the tower row periodically transmits a radio signal a0 to the wireless terminal station (2-1) installed at the steel tower (1-1) at the front end of the tower row. The radio signal a0 is a signal for starting the relay transmission, and has data in the packet format.

  The wireless terminal station (2-1) that has received the wireless signal a0 once holds the information acquired by reception in the reception buffer of the local station, and then detects the detection information in the own tower (1-1) in this received information. The added information a1 is created and wirelessly transmitted to the wireless terminal station (2-2) installed in the rear side, that is, the old side adjacent tower (1-2). The radio terminal station (2-2) of the old side adjacent tower (1-2) is information a3 in which detection information at the own tower is added to the information wirelessly received from the front side, that is, the young station (2-1). Is wirelessly transmitted to the wireless terminal station (2-3) of the next old side adjacent tower (1-3). Similarly, in the following steel towers (1-4, 1-5,...), The information (a4, a5,...) Obtained by adding the detection information in the own steel tower to the reception information from the old side is the younger side. Relay transmission in the form of wireless transmission to the wireless terminal station of the adjacent tower is performed.

  By sequentially performing such wireless relay transmission between adjacent towers, detection information at each tower (1-1 to 1-n) is transmitted to the information collecting station 32 at the rear end of the tower row. The information an transmitted to the information collecting station 32 at the rear end of the tower tower includes information detected and added for each tower (1-1 to 1-n). Thereby, the condition of each steel tower (1-1 to 1-n) can be remotely monitored.

  The radio signal a0 periodically transmitted from the information collection station 31 at the front end of the tower row carries data of a predetermined packet format for relay transmission while adding detection information at each tower. Although it is transmitted, the information content of the data only needs to form a format such as a header. That is, it may be substantially empty data (null data). However, if necessary, for example, a function updating program of each wireless terminal station (2-1 to 2-n) or some command information may be placed.

  FIG. 2 is a functional block diagram illustrating the configuration of the wireless terminal stations 2-x (2-1 to 2-n) installed in the steel towers (1-1 to 1-n). The wireless terminal station 2-x shown in the figure includes a low-power wireless I / F (interface) 21, a sensor I / F 22, an information storage unit 23, a transmission information generation unit 24, a periodic signal detection unit 25, and an adjacent station abnormality detection unit. 26, an abnormality control means 27, a transmission direction control means 28, and the like.

  The wireless I / F 21 performs wireless data communication using weak radio waves in the UHF band or SHF band assigned to a specific low-power radio. Data communication is performed by transmitting and receiving packet data. The sensor I / F 22 acquires detection information binarized to “1” or “0” for each detection item from the sensor group 40 that detects the state of the tower.

  The information storage means 23 is configured using a mass storage device using a non-volatile semiconductor memory, and temporarily stores and holds the information wirelessly received by the wireless I / F 21 from an adjacent station, and via the sensor I / F 22. The detection information in the own tower acquired in this way is accumulated retroactively for a predetermined number of times or a predetermined period. The transmission information generation means 24 adds the detection information at the own tower to the information wirelessly received from the adjacent station and creates new transmission information.

  The periodic signal detection means 25 detects whether or not a predetermined radio signal has been received within a predetermined time from a younger adjacent station located on the front end side of the tower row with respect to the own tower. In this detection, when the own tower is located at the head of the tower row, the information collection station 31 installed at the front end side of the tower row becomes the younger adjacent station, so the radio signal a0 from the information collection station 31 is It is detected whether or not it has been received within a predetermined time. In addition, when the own tower is located in the middle of the tower row, the wireless terminal station of the younger adjacent tower becomes the younger adjacent station, so that transmission information from the younger adjacent wireless terminal station is received within a predetermined time. It is detected whether or not. In either case, the presence / absence of an abnormality in the younger adjacent station is determined based on whether or not there is reception within a predetermined time. That is, when reception from an adjacent station is interrupted for a predetermined time or more, it is determined that an abnormality has occurred in the adjacent station.

  The adjacent station abnormality detection means 26 detects an abnormality in the old-side adjacent station located on the rear end side of the tower row with respect to the own tower. This detection is performed based on the success or failure of information transmission to the old side adjacent station. The wireless terminal station 2-x adds the detection information at the own tower to the reception information from the younger adjacent station and wirelessly transmits it to the old adjacent station. This wireless transmission is performed by exchanging a confirmation signal (ack) or the like with the old neighbor station, but this exchange is not established, and as a result, the transmission is unsuccessful, that is, for the old neighbor station. When the wireless access is not normally completed, it is determined that an abnormality has occurred in the old adjacent station.

  In the above determination, when the own tower is located in the middle of the tower row, the radio terminal station of the younger adjacent tower becomes the older adjacent station. When the own tower is located at the rear end of the tower row, the information collecting station 32 installed at the rear end side of the tower row becomes the old adjacent station. In any case, when the wireless access is not normally completed, it is determined that an abnormality has occurred in the old adjacent station.

  When the regular signal detecting unit 25 or the adjacent station abnormality detecting unit 26 detects an abnormality in the adjacent station, the abnormality control unit 27 adds the detected content, that is, the abnormality information to the transmission information. The transmission direction control means 28 wirelessly transmits transmission information including the abnormality information to the younger adjacent station when the adjacent station abnormality detection means 26 detects an abnormality in the old adjacent station.

  FIG. 3 is a system block diagram showing a specific configuration example of the wireless terminal station 2-x shown in FIG. As shown in the figure, the functions of the wireless terminal 2-x described above are small-scale using general-purpose devices such as the control unit 200, the wireless transmission / reception unit 210, the sensor I / F 220, the external I / F 221 and the memory 230. Easy to build.

  The main control unit 200, the wireless transmission / reception unit 210, the sensor I / F 220, the external I / F 221 and the memory 230 are configured using a microcomputer system (one-chip microcomputer) or a micro controller (PIC: Peripheral Interface Controller). can do. Specifically, a one-chip microcomputer provided on the market with a PIC series model number (PICxxxx) from US Microchip Technology can be used as it is.

  The wireless transmission / reception unit 210 corresponds to the wireless I / F 21. For this, a ready-made product in which an antenna, a wireless transmission / reception unit (RF unit), a modem, a communication control unit, and the like are formed as a single module can be used. As the memory 230, one built in a one-chip microcomputer can be used. For example, when storing and storing large-size information such as images, a semiconductor memory such as SRAM or EEP-ROM is used as a storage medium. An external storage device (storage) may be externally attached.

  The sensor group 40 includes a plurality of types of sensors 41. The detection output of each sensor 41 is preliminarily processed into binary data of “1” and “0” by the discrimination circuit 42 and then read into the main control unit 200 via the sensor I / F 220 and processed. The status of the own tower detected by the sensor group 40 is stored and accumulated in the memory 230.

  Some of the above-mentioned one-chip microcomputers are provided with a plurality of analog ports. When this is used, the detection signal of the sensor 41 is directly connected to the analog port, and “1” and “0” in the microcomputer. Can be converted into binary data. Some sensors 41 output binary data from the beginning. In this case, the binary data can be directly input to the digital port of the microcomputer.

  Power for operating the wireless terminal (2-x), the sensor group 40, and the like is supplied by a high-capacity small battery such as a lithium ion battery, a solar battery, or a power supply device 45 that combines these. Such an independent type power supply device 45 is suitable for being installed independently for each tower.

  FIG. 4 is a flowchart showing the operation of the main part of the above-described wireless terminal station (2-x). FIG. 5 shows a relay transmission mode executed by the above-described wireless terminal station (2-x).

  In FIG. 4, the wireless terminal station (2-x) first has the presence / absence of wireless inspection access from the specific wireless terminal station (S01), the presence / absence of wireless reception from the younger adjacent station (S11), and the old adjacent station. Is in a standby loop state for searching for presence / absence of wireless reception from (S21). At the same time, it is monitored whether or not the inspection access or the wireless reception has been continuously interrupted for a predetermined time (time over) (S31).

  If there is an inspection access (S01), a process (S02) corresponding to the inspection access is executed. In this process (S02), the detection information of the own tower stored and stored in the wireless terminal (2-x) is read and accessed by the specific wireless terminal. As a result, the state of the tower can be remotely inspected simply by bringing the specific radio terminal station for inspection close to the tower.

  Here, as shown to (a) of FIG. 5, the radio | wireless terminal station (2-1 to 2-n) each installed in each tower (1-1 to 1-n) in the tower row which is a monitoring object In the first mode in which all normally operate, there is radio reception from the younger adjacent station within the predetermined time by the radio signal a0 periodically transmitted from the information collecting station 31 on the tower row front side (S11). .

  If there is radio reception from the younger adjacent station, information obtained by adding detection information (own information) at the own tower to the received information is transmitted to the older adjacent station by radio (S12). Then, if the wireless transmission to the old adjacent station is normally completed (S13), the process returns to the initial standby loop state (S01-S11-S21-S31).

  In the first mode, as shown in FIG. 5A, each wireless terminal station (2-1 to 2-n) performs forward wireless relay transmission from the young side to the old side. Thereby, the radio signal periodically transmitted from the information collecting station 31 on the front end side of the tower row sequentially passes through the radio end stations (2-1 to 2-n) of each tower (1-1 to 1-n). Thus, a unidirectional wireless relay route reaching the information collecting station 32 on the rear end side is formed.

  Each wireless terminal station (2-1 to 2-n) stores the information received from the younger adjacent station once in the memory, and then adds the information obtained by adding the detection information (own information) at the own tower. Although it is newly created and wirelessly transmitted to the old adjacent station, the detection information of all the steel towers can be wirelessly transmitted by one communication connection process at the rear end of the steel tower row. This is very effective in increasing the utilization efficiency of the wireless relay route. That is, the frequency of occurrence of communication requests can be greatly reduced as compared with the case where the detection information of the tower is relayed and transmitted by individual communication connection processing for each tower.

  Next, as shown in FIG. 5B, when a communication failure occurs in the wireless terminal station (2-3) installed in any tower (for example, 1-3) in the tower row. In the younger side adjacent station (radio terminal station 2-2) located before the radio terminal station (2-3) where the failure occurred, the old side adjacent station (radio terminal station 2-3) where the fault occurred Wireless transmission to cannot be performed.

  The wireless transmission procedure is started after a connection request (communication request) is transmitted from the transmission side to the reception side and a response is returned from the reception side. If the receiving side is operating normally, even if the receiving side is busy and cannot immediately respond to the connection request, a response (busy) indicating that is returned. Normally, a connection request from the transmission side is tried (retries) a plurality of times. However, if the reception side is in a normal operation state, some response is returned from the reception side according to the communication status and stage. That is, wireless transmission proceeds by bidirectional communication between the transmission side and the reception side even when information is transmitted unilaterally. If there is a failure on the receiving side, the response from the receiving side to the transmitting side becomes abnormal, so that the wireless transmission cannot proceed, and as a result, the wireless transmission cannot be terminated normally.

  When the wireless transmission to the old neighbor station (wireless terminal 2-3) could not be terminated normally (S13), the younger neighbor station (wireless terminal station 2-2) on the transmission side Second mode for wirelessly transmitting to the younger adjacent station (wireless terminal 2-1) information with information indicating that an abnormality has occurred in the older adjacent station (wireless terminal station 2-3) (older side abnormal information) Is executed (S14).

  The wireless terminal station (2-1) on the younger side than the wireless terminal station (2-2) that has executed the second mode is in the standby loop state (S01-S11-S21-S31). A third mode for wirelessly receiving transmission information from is executed (S21-S22-S23). In the third mode, an operation is performed in which the own information is added to the reception information from the old neighbor station and wirelessly transmitted to the young neighbor station (S22). As a result, a radio relay route in the reverse direction toward the front end side of the tower row is formed in front of the radio terminal station (2-3) where the failure has occurred.

  On the other hand, in the wireless terminal station (2-4) located immediately after the failed wireless terminal station (2-3), wireless reception from the younger adjacent station (wireless terminal station 2-3) is interrupted. When a time-over (S31) in which the reception interruption state continues continuously for a predetermined time or more occurs, the number of occurrences of the time-over is counted (S32) and the old side is not waited for reception from the younger adjacent station. The fourth mode in which radio transmission is performed to the adjacent station (radio terminal station 2-5) is executed (S33). The content transmitted at this time is only self-information because there is no wireless reception from the younger side. Or it becomes the information which added the information which shows that the reception from the younger side ceased to self information.

  Each wireless terminal station (2-5 to 2-n) on the older side than the wireless terminal station (2-4) that executed the fourth mode adds its own information to the received information from the younger adjacent station. The first mode in which the transmitted information is wirelessly transmitted to the old neighbor station is executed. As a result, a forward wireless relay route toward the rear end side of the tower row is maintained behind the wireless terminal station (2-3) where the failure has occurred.

  The radio transmission of the old side adjacent station in the fourth mode is a preliminary stage for determining the abnormality of the young side adjacent station, and before the count value of the time over occurrence count reaches a predetermined number, When there is wireless reception (S32), the wireless relay transmission in the first mode is executed and the count value is reset to the initial value.

  However, when the count value reaches a predetermined number of times, it is determined that there is an abnormality in the younger adjacent station (wireless terminal station 2-3), and information with the fact is wirelessly transmitted to the older adjacent station. The fifth mode is executed (S34). The information including the abnormality information is sequentially relayed and transmitted by the wireless terminal stations (2-5 to 2-n) on the old side of the wireless terminal station (2-4) that has executed the fifth mode, and the tower train The data is transmitted to the information collecting station 32 on the rear end side.

  As described above, the information collecting stations 31 and 32 are installed at both ends of the tower row, and any of the wireless terminal stations (2-1 to 2-n) of each tower (1-1 to 1-n) is between adjacent stations. In a normal state in which relay transmission by wireless communication is possible, a unidirectional wireless relay route is formed to transmit the group detection information of each tower (1-1 to 1-n) from the front end to the rear end of the tower row. Is done. Thereby, the situation of each steel tower (1-1 to 1-n) can be intensively monitored remotely.

  On the other hand, when a failure in which the relay transmission is impossible occurs in the wireless terminal station (2-3) of any of the towers (1-3), the wireless terminal stations (2-2, 2) before and after the failure occurs. A two-way wireless relay route from 2-4) to the front and rear ends of the tower row is formed. In this relay route, as shown in FIG. 5C, the wireless terminal stations (2-2, 2-4) located before and after the failed tower (2-3) are out of line of sight. However, it is formed without being affected at all.

  As a result, even if a communication failure occurs in any of the wireless terminals, it is possible to continue to remotely monitor the status of each tower including the presence or absence of the failure. The position of the wireless terminal station where the failure has occurred can be immediately identified by the information transmitted to the information collecting stations 31 and 32 at both ends of the tower row.

Table 1 exemplifies the relationship between the detection items and detection contents of the sensors suitable for monitoring the status of the steel towers (1-1 to 1-n) and abnormal phenomena.

  As shown in Table 1, abnormal phenomena (including predictive signs) to be monitored in the tower include lightning damage, beast damage, wind damage, ice and snow damage, salt damage, human destruction, heavy machinery approach, untrustworthy person approach, These abnormalities or abnormal signs include, for example, human sensors using microphones, ultrasonic sensors, vibrometers, accelerometers, gyros, CT, strain gauges, infrared sensors, and various weather sensors that measure temperature and wind speed. Can be detected.

  When abnormality detection is performed using a plurality of types of sensors, it is necessary to detect abnormality of the sensors individually and to perform remote monitoring. FIG. 6 is a flowchart showing an embodiment of the abnormality detection process.

  In FIG. 6, the detection state of each sensor is sequentially read and stored and stored by the control unit in the wireless terminal station. If the read detection state is abnormal (S41), the abnormality information is transmitted. The information is included in the information and transmitted wirelessly (S42), and the history of the abnormality information is stored and saved (S43). The stored history is appropriately read out remotely by inspection access or the like.

  Thereafter, an initialization reset operation is performed on the sensor in the abnormality detection state (S44). If the initialization reset result is good, the sensor continues to be used as is, but if the reset result is bad (S45), it is determined that the sensor itself is abnormal, and the abnormality information of the sensor is transmitted as transmission information. And wirelessly transmit (S46), and set to invalidate the detection information of the sensor (S47).

  Thus, it is desirable that each steel tower is provided with sensor abnormality detection means for individually detecting the abnormality of each sensor together with a plurality of types of sensors for detecting the status of the own steel tower. By including the detection content of the sensor abnormality detection means in the detection information in the own tower, the state of each sensor can be accurately remotely monitored.

  As mentioned above, although this invention was demonstrated based on the typical Example, this invention can have various aspects other than having mentioned above. For example, the unidirectional wireless relay route that is regularly formed may be set independently of the power transmission direction. Moreover, the technique of the present invention is not limited to a single steel tower row, and can be applied to, for example, a branch steel tower row.

  Even if communication failure occurs on any of the towers in the tower row to be monitored, failure of the above wireless terminal station can be achieved only by wireless communication within the range of weak radio waves defined by specific low power. It is possible to remotely and accurately monitor the status of each tower including

1 is a schematic view of an overhead power transmission line tower-based monitoring system to which the technology of the present invention is applied. It is a block diagram according to function which shows the structure of the radio | wireless terminal station installed in each steel tower. FIG. 3 is a system block diagram illustrating a specific configuration example of a wireless terminal station illustrated in FIG. 2. It is a flowchart which shows the operation | movement in the principal part of a radio | wireless terminal station. It is the schematic which shows the relay transmission mode of the radio | wireless terminal station formed in the system of this invention. It is a flowchart which shows one Embodiment of the abnormality detection process with respect to a sensor. It is the schematic of the conventional overhead power transmission line tower base group monitoring system. It is the schematic which shows the relay transmission mode of the radio | wireless terminal station formed in the conventional system.

Explanation of symbols

1-1 to 1-n Transmission line tower 2-1 to 2-n, 2-x Wireless terminal station (present invention)
21 Low power wireless I / F
22 Sensor I / F
DESCRIPTION OF SYMBOLS 23 Information storage means 24 Transmission information generation means 25 Periodic signal detection means 26 Adjacent station abnormality detection means 27 Abnormality control means 28 Transmission direction control means 31, 32 Information collection stations 40 Sensor group 41 Sensor 42 Discrimination circuit 45 Power supply apparatus 200 Control part 201 Wireless transmission / reception unit 220 Sensor I / F
221 External I / F
230 Memory 7-1 to 7-n Wireless terminal (conventional)
82 Information collection station (conventional)

Claims (6)

The detection status of the towers in the transmission line towers that make up the overhead power transmission line is detected by the detection means installed in each tower, and the detection information for each group is detected between adjacent towers by the radio terminal station installed in each tower. In the overhead power transmission line tower-based monitoring system that remotely monitors the status of each tower by relaying to the information collection station at the end of the tower row by relaying sequentially in the direction of the towers by wireless communication,
Information collection stations were installed at both ends of the tower row,
In a normal state where any wireless terminal station of each tower can relay and transmit by wireless communication between adjacent stations, a unidirectional wireless relay route that transmits detection information from each tower toward the rear end of the tower row While collecting the detection information in each steel tower at the information collection station on the rear end side by forming,
When a failure that prevents the relay transmission from occurring at any of the radio terminal stations of any of the towers, a two-way radio relay route from the preceding and succeeding radio terminal stations to the front and rear ends of the tower row is established. The detection information at each tower on the wireless relay route is collected at the information collection station on the front side by the wireless relay route toward the front end, and on the wireless relay route by the wireless relay route toward the rear end. The overhead power transmission line tower-based monitoring system characterized in that detection information on each steel tower is collected by the information collection station on the rear end side .   In Claim 1, each radio terminal station of each tower adds detection information at its own tower to the information wirelessly received from the adjacent station, and wirelessly transmits this additional information to the adjacent station opposite to the adjacent station. An overhead transmission line tower-based monitoring system characterized by comprising means.   In Claim 1 or 3, when the radio terminal station of each steel tower respectively stops the radio reception from the adjacent station ahead of the own tower over a predetermined time, the information added to that effect is sent to the own tower. If the wireless transmission to the adjacent station on the rear side of the tower is not possible, information to that effect is sent to the adjacent station on the own tower. An overhead power transmission line tower-based monitoring system, characterized by comprising: means for wireless transmission.   The wireless terminal station of each tower according to any one of claims 1 to 3, wherein each of the wireless terminal stations of the steel tower stores storage means for retrospectively accumulating detection information in the own steel tower, and stores the stored information of the storage means in the wireless terminal station of the own steel tower. An overhead power transmission line tower-based monitoring system comprising a control means for accessing a specific wireless terminal station via the overhead power transmission line tower.   In any one of Claims 1-4, each steel tower has a sensor abnormality detection means which detects the abnormality of each sensor individually with a plurality of types of sensors for detecting the status of the own steel tower, and this sensor abnormality detection An overhead power transmission line tower-based monitoring system characterized in that the detection contents of the means are included in the detection information of the own tower and transmitted. 6. The overhead transmission line tower-based monitoring system according to claim 1, wherein each wireless terminal station constitutes a packet communication terminal that transmits information by wireless transmission and reception of packet data.

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