JP2008067467A - Utility pole break state monitoring system and utility pole used in that utility pole break state monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a utility state break state monitoring system, which can monitor the break state of a utility pole not accompanied with power failure by monitoring it at a branch office, etc., and to provide a utility pole which is used in this utility pole break state monitoring system. <P>SOLUTION: This utility pole break state monitoring system, which is equipped with a plurality of the utility poles 1 where embedded optical fibers are connected to constitute a system of optical signal path L, a light source which injects a test beam from one end of the optical signal path, and an optical signal detection means which is arranged at least at either one end or the other end of the optical signal path, detects a broken utility pole by detecting the optical signal from the optical signal path L based on the test beam injected from the light source. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a monitoring system that detects the presence or absence of breakage without power failure in a plurality of utility poles that support overhead lines, or to a utility pole that is used in the monitoring system.

  Conventionally, power pole managers of power companies, etc., are perpetrators or witnesses when a power pole breaks due to a natural disaster such as a car collision or a typhoon, especially when it breaks without a power failure (disconnection). In response to notifications from local residents, etc., they recognized (recognized) the occurrence of telephone pole breakage, and then sent workers to the site for confirmation, and then handled repairs.

  In this way, the utility pole manager recognizes the breakage of the power pole triggered by the contact from the perpetrator who broke the power pole, the witness of the broken power pole, the surrounding residents, etc. There will be a time lag before the response starts. In addition, if the perpetrator forgets to contact the telephone pole manager that the telephone pole has been broken, etc., the telephone pole manager will not break the telephone pole until the third party finds and reports the broken telephone pole. I couldn't recognize it.

  In addition, even if the telephone pole manager recognizes the breakage of the telephone pole by contacting the residents in the surrounding area, if the worker (person) cannot be confirmed at the moment due to severe storms, it will take more time to start repairs. The problem that the progress of was needed occurred.

  Therefore, in view of the above problems, the present invention is a power pole breakage situation monitoring system capable of monitoring the breakage situation of a power pole without a power failure by monitoring at a sales office or the like that performs maintenance of the power pole, and the power pole breakage situation. It is an object to provide a utility pole used in a monitoring system.

  Therefore, in order to solve the above problems, a utility pole breakage monitoring system according to the present invention includes a pole-shaped utility pole body, an optical fiber continuous from one end to the other end and at least partially embedded in the utility pole body, A power pole including connection means provided at both ends of the optical fiber, wherein the buried portion of the optical fiber includes at least a pair of a downward portion and a upward portion that are directed downward with respect to the power pole main body, The lower ends of the pair of descending parts and rising parts are connected to each other at positions where they are buried in the ground when the utility poles are installed. A plurality of utility poles connected to form an optical signal path, a light source for entering test light from one end of the optical signal path, and the optical signal path One end or the other end An electric pole breakage condition monitoring system comprising at least one optical signal detection means, wherein an optical signal from the optical signal path based on test light (test signal) incident from the light source is detected. It is characterized by detecting a broken utility pole.

  According to this configuration, at least a part of the optical fiber continuous from one end to the other end is embedded in the power pole main body, and the embedded portion of the optical fiber has a descending portion and an upper portion facing downward with respect to the power pole main body. At least a pair of ascending parts heading toward each other, and lower ends of the pair of descending parts and ascending parts are connected to each other at positions where they are buried in the ground when the utility pole is installed. And when a car collides or a force from the lateral direction (horizontal direction) is applied to the utility pole due to a storm or the like, it breaks near the root where the most force acts, that is, the portion where the optical fiber is embedded. Often breaks. As described above, when the portion in which the optical fiber is embedded is broken, strong bending (bending / bending) or breakage occurs in the optical fiber embedded in the portion.

  On the other hand, the electric pole breakage status monitoring system connects a plurality of the optical poles embedded in the electric pole so as to form one optical signal path, and enters test light from one end of the one optical signal path by a light source. The optical signal based on the test light is configured to be detected by optical signal detection means arranged at one end or the other end of the optical signal path. Therefore, in the optical signal path, when the optical fiber is strongly bent or broken due to the breakage of the electric pole as described above, a loss occurs in the test light propagating in the optical fiber at such a portion, and this loss is converted into the optical signal. It can be detected by optical signal detection means arranged at at least one of the one end or the other end of the path.

  In the present invention, the breakage of the utility pole refers to a state in which the utility pole is broken without power failure, that is, a situation in which the utility pole body is broken without breaking the overhead wire, but it is not necessary to be completely broken and is buried. This includes the breakage or damage of the utility pole that causes strong bending or breakage in the optical fiber.

  The descending portion of the utility pole is embedded in a straight line along the vertical direction of the utility pole body, and the ascending portion is substantially parallel with a predetermined interval in the circumferential direction of the descending portion and the utility pole body. The structure embedded may be sufficient.

  When only one linear optical fiber is embedded in the power pole body along the vertical direction of the power pole body, an automobile or the like collides with the side where the optical fiber is embedded and the radial opposite side of the power pole, If the collision part is only slightly damaged (broken), strong bending or the like does not occur in the optical fiber.

  However, according to the above configuration, since the linear optical fibers are embedded substantially parallel to each other along the vertical direction of the utility pole body, breakage (damage from a wide range in the circumferential direction of the utility pole). ) Is strongly bent in the optical fiber. That is, there is a high possibility that strong bending or the like will occur in either the descending part or the ascending part of the embedded optical fiber even with respect to the above-described breakage.

  Therefore, the utility pole breakage status monitoring system using the utility pole having the above-described configuration can monitor the presence or absence of a utility pole breakage at a remote location (business office or the like) and increase the detection sensitivity of the utility pole breakage status.

  Further, the pair of descending parts and rising parts of the utility pole may be embedded in two pairs, and each descending part or raising part may be buried at four locations at substantially equal intervals in the circumferential direction of the utility pole body. .

  According to this configuration, two pairs of the descending part and the ascending part are embedded in the utility pole (electric pole main body), and the descending parts or the ascending parts are embedded at four locations at substantially equal intervals in the circumferential direction of the utility pole body. Therefore, even if a car or the like collides from the circumferential direction of the utility pole or breaks due to a storm or the like, one of the four optical fibers is buried near the broken point. Therefore, a strong bend occurs in any descending part or ascending part.

  Therefore, the utility pole breakage status monitoring system using the utility pole having the above-described configuration can monitor the presence or absence of a utility pole breakage at a remote location (such as a sales office) and can further improve the detection sensitivity of the utility pole breakage status.

  Further, the optical fiber of the utility pole may be configured to be embedded in a spiral shape so that at least one and at least a part of the descending portion or the ascending portion is lowered or raised along the circumferential direction of the utility pole body.

  According to such a configuration, the portion of the utility pole body in which the optical fiber is helically embedded has the optical fiber embedded in the entire circumferential direction, so that even in the slight breakage (damage) in the entire circumferential direction of the utility pole, A strong bend occurs in the fiber. Therefore, the utility pole breakage monitoring system using such a utility pole also increases the sensitivity of detecting a broken utility pole.

  Moreover, the structure which is an optical outlet attached to the surrounding side surface of the said utility pole main body may be sufficient as the said connection means of a utility pole.

  According to such a configuration, since the optical outlets are attached to both ends of the optical fiber embedded in the main pole body, when connecting a plurality of the main poles to form one optical signal path, the connection is facilitated. be able to. In addition, since the optical fiber is vulnerable to water, providing the optical outlet on the peripheral side surface of the utility pole body easily and inexpensively prevents water from entering the utility pole body along the optical fiber from the peripheral side surface of the utility pole body. As a result, it is possible to prevent deterioration of the optical fiber embedded in the utility pole body.

  Moreover, the structure which is an optical power meter installed in the other end of the said optical signal path | route may be sufficient as the said optical signal detection means of a utility pole broken condition monitoring system.

  According to such a configuration, the optical fiber is strongly bent (or broken) to the test light incident from one end of the optical signal path by the light source due to the strong bending due to the breaking of the optical fiber embedded in the broken electric pole. Loss occurred at the part, and the test light after such loss was detected by the optical power meter installed at the other end of the optical signal path, and reading the value caused breakage at the utility pole in the optical signal path This can be easily and reliably recognized.

  Moreover, the structure which is an OTDR measuring device installed in the end of the said optical signal path | route may be sufficient as the said optical signal detection means of a utility pole breakage condition monitoring system.

  According to such a configuration, the optical fiber is strongly bent (or broken) to the test light incident from one end of the optical signal path by the light source due to the strong bending due to the breaking of the optical fiber embedded in the broken electric pole. A loss occurs in the portion, and the backscattered light in the optical fiber is also attenuated by the loss. By detecting (receiving) the attenuated backscattered light with an OTDR measuring device installed at one end of the optical signal path, it is possible to detect that the electric pole on the optical signal path is broken, and from the light source to the broken place It becomes possible to measure the distance to (the place where the loss of the test light propagating in the optical fiber occurs).

  Further, a light source is further installed at the other end of the optical signal path of the utility pole breakage monitoring system, and the optical signal detection means can switch between an optical power meter and an OTDR measuring instrument at one end of the optical signal path. When the optical power meter is connected, test light is incident from the light source at the other end of the optical signal path, and when the OTDR measuring instrument is connected, the optical signal The configuration may be such that test light is incident from a light source at one end of the path.

  According to this configuration, as the optical signal detection means, first, an optical power meter is connected to one end of the optical signal path, and an optical signal based on the test light incident from the light source at the other end of the optical signal path is transmitted to the optical power. Light is received by the meter, and when the utility pole breaks as described above, the test light changes due to strong bending or breakage of the optical fiber due to breakage of the utility pole (attenuation due to bending loss at the bent portion of the optical fiber, etc.) It is detected that the utility pole in the optical signal path is broken.

  After detecting the breakage of the utility pole, the optical signal detecting means connected to one end of the optical signal path is switched from the optical power meter to the OTDR measuring instrument, and the light source for entering the test light into the optical signal path is the light source on the other end side Switch from one to the other. By switching in this way, as described above, the distance on the optical signal path from the light source to the portion where the optical fiber is strongly bent (the broken portion of the utility pole) can be detected.

  By doing in this way, detection of only the presence or absence of breakage of the utility pole on the optical signal path and detection of the distance on the optical signal path to the broken utility pole can be efficiently detected as necessary.

  In addition, a storage medium storing at least the utility pole number of each utility pole, position information, and distance information on the optical signal path from the light source of the utility pole breakage monitoring system, and an optical signal from the light source detected by the OTDR measuring instrument An arithmetic processing unit that compares the distance information on the road and the distance information on the optical signal path from the light source of each power pole stored in the storage medium, and an output that outputs at least the corresponding power pole number and position information as a result of the comparison The structure provided with a part may be sufficient.

  According to this configuration, as described above, the distance (distance information) on the optical signal path from the light source to the broken utility pole (the site where the strong bending of the optical fiber is generated) is measured, and the storage medium The utility pole is specified based on the distance compared with the distance information stored in the utility pole, and the utility pole number corresponding to the utility pole, the location information of the utility pole, and the like are output to the output unit. As a result, it is possible to immediately identify the broken utility pole, recognize the breakage of the utility pole without receiving a communication from the witnesses, etc., and can quickly repair it.

  The storage medium of the utility pole breakage status monitoring system further includes map information, the arithmetic processing unit compares position information of the utility pole or distance information from a light source with the map information, and the output unit provides the map. The structure which outputs the location applicable to the position of the said utility pole of information may be sufficient.

  According to such a configuration, as described above, the broken pole is specified, the position information of the pole is specified, and the arithmetic processing unit compares it with the map information stored in the storage medium. By identifying the position of the power pole and outputting the result, it becomes easier to identify the power pole, and even for workers heading for repair, it is possible to go to the power pole accurately and quickly without making a mistake. It will be possible to respond quickly to repairs.

  As described above, according to the present invention, the power pole breakage status monitoring system and the power pole breakage status monitoring system capable of monitoring the power pole breakage status without power failure by monitoring at a business office or the like that performs maintenance of the power pole. It becomes possible to provide the utility pole used.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, a utility pole 1 used in a utility pole breakage monitoring system will be described based on FIG.

  The utility pole 1 includes a utility pole main body 2 formed in a cylindrical shape, an optical fiber 3 embedded in the utility pole main body portion 2 for transmitting test light (test signal) described later, and both ends of the optical fiber 3 respectively. And provided with connecting portions 4 and 5 for connecting to an external optical fiber (a connecting optical fiber r described later).

  The utility pole body 2 is formed in a hollow cylindrical shape with a long upper portion made of reinforced concrete closed.

  Both ends of the optical fiber 3 are connected to the connection portions 4 and 5, respectively, and between them, the optical fiber 3 is embedded so as to be directed downward or upward while maintaining a predetermined distance from the outer peripheral surface (peripheral side surface) of the utility pole body 2. The optical fiber 3 is embedded (embedded) when the utility pole body 2 is formed.

  Specifically, the optical fiber 3 is provided with a connection end 3a connected to the connection part 4 or 5, a descending part 3b provided (embedded) downward, and provided (embedded) upward. A lower side connecting part 3d that connects the rising part 3c, the lowering part 3b and the rising part 3c on the lower side (lower ends), and an upper side that connects the lowering part 3b and the rising part 3c on the upper side (upper ends). The connecting portion 3e is appropriately combined to form one continuous optical signal path.

  In the present embodiment, the optical fiber 3 starts from the connection portion 4 in which the connection end portion 3a on one end side is attached to the upper outer peripheral surface (circumferential side surface) of the utility pole body 2 from one end to the other end. It is embedded toward the radial center of the utility pole body 2. A first descending portion 3b is embedded linearly downward (downward) along the longitudinal direction of the utility pole body 2 from the center side end. From the lower side end portion, the first lower side connecting portion 3d is embedded in a length of ¼ circumference of the utility pole body 2 and along the outer peripheral surface. From the end portion, the first rising portion 3c is embedded upward (to rise) along the longitudinal direction. From the upper end portion, the upper side connecting portion 3e is embedded in the opposite direction to the lower side connecting portion 3d so as to be 1/2 the length of the utility pole main body 2 and along the outer peripheral surface. From the end portion, the second descending portion 3b is embedded linearly downward (downward) along the longitudinal direction of the utility pole body 2. From the lower end, the second lower connecting portion 3d is embedded in the same direction as the upper connecting portion 3e so as to have a length of ¼ circumference of the utility pole body 2 and along the outer peripheral surface. From the end portion, the second rising portion 3c is embedded in a straight line upward along the longitudinal direction of the utility pole body 2. A connecting portion 3 a on the other end side of the optical fiber 3 is embedded from the upper end portion to the connecting portion 5 toward the radially outer side of the utility pole body 2. In this way, the optical fiber 3 constituted by a single continuous optical signal path is embedded in the utility pole body 2 so as to meander while repeating upward and downward in the vertical direction from one end to the other end. Yes.

  That is, the descending part 3b and the ascending part 3c of the optical fiber 3 are embedded in the utility pole body 2 so as to be parallel to each other at equal intervals in the circumferential direction, and a corresponding pair of descending part 3b and ascending part 3c The lower ends are connected by the lower connecting portion 3d, and the upper ends of the corresponding pair of descending portions 3b and rising portions 3c are connected by the upper connecting portion 3e, so that the optical fiber 3 is continuous without branching. Are configured as a single optical fiber 3.

  In addition, the lower connection portion 3d is disposed (embedded) so as to be positioned in a portion buried in the ground when the utility pole 1 is installed in a standing state (standing on the ground). This is because the possibility that the utility pole 1 breaks in the ground is very low, and thus there is little need to embed the optical fiber 3 over the entire length of the buried portion.

  On the other hand, when the utility pole 1 is installed and the overhead line is laid, the upper side connection part 3e may be in the vicinity of the overhead line laid at the lowermost position or on the upper side thereof. When a lateral force (horizontal direction with respect to the ground) is applied to the utility pole 1 due to a car crash or a storm, the utility pole 1 often breaks at a position close to the ground. This is because it is sufficient if 3 is buried. Further, by not burying the optical fiber 3 in a portion where the possibility of breakage is low, the amount of the optical fiber 3 used can be reduced, and the cost can be reduced.

  The connection parts 4 and 5 are members (connection means) for connecting the optical fiber 3 embedded in the utility pole body 2 and an external optical fiber. In the present embodiment, the connection parts 4 and 5 are configured by optical outlets 4 and 5. The The optical outlets 4 and 5 include a main body (not shown) partially embedded in the outer peripheral surface of the utility pole main body 2, and a plug provided at the tip of the optical fiber is detachably connected to the inside of the main body. An optical fiber is optically connected to each other by connecting a plug at the tip of an external optical fiber to the adapter that houses the adapter and to which the end of the optical fiber 3 embedded in the utility pole body 2 is connected. It comes to be combined. In addition, since the optical fiber is vulnerable to water, the optical fiber 3 inside the utility pole body 2 and the external optical fiber are connected via an optical outlet attached to the outer peripheral surface of the utility pole body 2. 1 (electric pole main body 2) can be prevented from entering water (rain water, etc.) from the outer peripheral surface of the electric pole main body 2 through the optical fiber.

  Using such a utility pole 1, a utility pole breakage status monitoring system (hereinafter simply referred to as “monitoring system”) 10 as shown in FIG. 2 is configured.

  In the monitoring system 10, a plurality of utility poles 1, 1,... Are connected by a connecting optical fiber r, and an optical power meter 11 as an optical signal detection means and an OTDR measuring instrument 12 are connected to one end in a switchable manner, and the other end. Is connected to a light source 13.

  Specifically, the plurality of utility poles 1, 1,... Connect the connection portion 4 of one utility pole 1 and the connection portion 5 of the other utility pole 1 of the adjacent utility poles 1, 1 with a connecting optical fiber r, and connect them. Are connected in series without branching by repeating between adjacent electric poles 1 and 1 to form a single optical signal path L. One end of the optical signal path L is drawn into the sales office M and connected to the optical power meter 11 and the OTDR measuring instrument 12 which are optical signal detecting means, and the light source 13 is connected to the other end. Yes. The light source 13 is provided at the end of the optical signal path L opposite to the optical signal detecting means side. In the present embodiment, the light pole 13 is the farthest distance on the optical signal path L from the sales office M. The optical fiber is arranged up to the optical power meter 11 without going through the utility pole 1 or the like in the middle, and is arranged in the sales office M.

  A monitor (output unit) 14 for outputting detected data (information) and displaying information corresponding to the data is connected to the optical signal detection units 11 and 12 via an arithmetic processing unit 15. . The arithmetic processing unit 15 includes a storage medium (not shown) for storing various data such as a database, and is stored in the storage medium and the data detected by the optical signal detection means 11 and 12. The data is compared and the comparison result is displayed on the monitor screen (see FIG. 5).

  As described above, one optical signal path L forms one continuous (unbranched) optical signal path L from the optical signal detection means 11, 12 at one end to the light source 13 at the other end. Therefore, in order to monitor the breakage of the utility pole 1 constituting (supporting) the electric wire network having a plurality of branches, it is necessary to arrange a plurality of optical signal paths L1, L2,... As shown in FIG. There is. In detail, the optical signal path L1 of the first system is connected (connected) in order from the utility pole 1 closest to the sales office M by the connecting optical fiber r to form one optical signal path L1. Next, in the optical signal path L2 of the second system, the connecting optical fiber r is disposed without being connected to the utility pole 1 up to the utility pole 1a branched from the optical signal path L1. The connecting optical fiber r is connected to the first utility pole 1a 'after branching. After that, the optical signal path L2 is configured by connecting (connecting) the connecting optical fibers r to the utility poles 1, 1,. Similarly, in the optical signal path L3 of the third system, the connecting optical fiber r is disposed without being connected to the utility pole 1b from the optical signal path L1 to the utility pole 1b, and the first utility pole 1b after the branch is provided. Connect to '. Thereafter, the optical signal path L3 is configured by connecting (connecting) the connecting optical fibers r to the utility poles 1, 1,. Further, in the fourth optical signal path L4, the connecting optical fiber r is disposed without connecting to the utility pole 1c from the optical signal path L3 to the utility pole 1c, and the first utility pole 1c ′ after branching is provided. Then, the optical signal path L4 is configured by connecting (connecting) the connecting optical fibers r to the utility poles 1, 1,. Similarly, optical signal paths L5, L6,... Of the fifth, sixth,... System are also configured. By configuring in this way, it is possible to monitor the state of loss of the utility pole 1 that constitutes a complicatedly branched electric wire network. Become.

  That is, an optical cable is formed by bundling, for example, 1000 cores made of optical fibers constituting one optical signal path L, and the optical cable is divided into 500 cores at the first branching point, and then the branching point thereafter. Then, branching is divided into 250 cores, and further branching into 125 cores at subsequent branching points, and so on, so that a plurality of core wires themselves constituting a single optical signal path L can be split without branching. The optical signal path L can be disposed along the electric wire network including the branching points.

  In addition, a high-voltage line, a low-voltage line, a communication line, or the like is appropriately laid on the utility pole 1 at the time of installation. The optical fiber (coupling optical fiber r) constituting the optical signal path L described above is used in this embodiment. Is arranged along a communication line laid 6 to 7 m from the ground. However, the present invention is not limited to this, and the optical fiber constituting the optical signal path L may be laid alone on the utility pole, or may be disposed along other overhead lines such as a low-voltage line. .

  Returning to FIG. 2, in the monitoring system 10, the test light is normally incident from the light source 13 of the sales office M from the other end of the optical signal path L, and the incident test light is transmitted through the optical signal path L. In order to receive the light, one end of the optical signal path L is set to be connected to the optical power meter 11. At that time, the light source 13 enters the test light having a constant output into the optical signal path L, and based on the test light received by the optical power meter 11 if the utility poles 1, 1,. An optical signal (test light reaching via the optical signal path L) also has a constant output.

  As shown in FIG. 4, when an automobile collides with one electric pole 1 on the optical signal path L and the electric pole 1 breaks, strong bending or breakage occurs at a corresponding portion of the embedded optical fiber 3. Arise.

  When a strong bend occurs in the optical fiber, a loss occurs in the optical signal (test light) propagated inside the strong bend and attenuates. Accordingly, the light reception level of the optical signal received by the optical power meter 11 is attenuated. By detecting this attenuation by the optical power meter 11, it is possible to detect the occurrence of breakage in any one of the power poles 1 on the optical signal path L.

  As described above, when it is detected by the optical power meter 11 that any one of the power poles 1 on the optical signal path L is broken, the optical signal detection means to which one end of the optical signal path L is connected next. Is switched from the optical power meter 11 to the OTDR measuring device 12. In this embodiment, this switching is controlled so that it is automatically switched when the optical power meter 11 detects breakage of the utility pole 1, but it is not necessary to be limited to this. Anyway. Further, at that time, it is desirable to set so that a message is displayed on the screen of the monitor 14 in order for the operator to recognize that the electric pole 1 is broken.

  As described above, the light signal detecting means is switched from the optical power meter 11 to the OTDR measuring device 12, and at the same time, the light source that has been irradiated with the test light on the optical signal path L is from the light source 13 installed at the other end. It is switched to the light source 13 ′ installed at one end. In the present embodiment, the light source 13 'on one end side is built in the OTDR measuring instrument.

  Here, an OTDR measuring device (Optical Time Domain Reflectometer) is a waveguide mode of an optical fiber among Rayleigh scattered light generated when a light pulse (test light) is incident from one end of the optical fiber. By measuring the level change of the weak reflected light (backscattered light) that returns to the incident end side, the measuring instrument can measure the distance from the light source to the bent part (strong bending) generated in the optical fiber It is. Therefore, by switching from the optical power meter 11 as described above, the distance on the optical signal path L from the light source 13 ′ (OTDR measuring device 12) to the bent portion (broken utility pole 1) generated in the optical fiber is detected. can do.

  The distance information thus detected is transmitted to the arithmetic processing unit 15. The arithmetic processing unit 15 includes the distance information from the light source 13 ′ to each power pole 1 stored in the storage medium and the bent portion of the optical fiber 3 from the light source 13 ′ detected by the OTDR measuring instrument, that is, the broken power pole 1 Is compared with the distance information until the utility pole 1 where the breakage has occurred is specified. Information stored in the storage medium relating to the identified utility pole 1 is output to the monitor 14. By this output, as shown in FIG. 5, the character information of the position of the specified utility pole 1 is displayed on the screen of the monitor 14 (see FIG. 5 (a)), or the map information of the position is displayed. (See FIG. 5 (b)). In this embodiment, the character information and the map information are set so that they can be viewed alternately by performing a switching operation. However, the present invention is not limited to this, and only one of them is displayed. It may be configured such that both are displayed on one screen. Further, it may not be displayed on the monitor screen, and may be configured to be printed on paper or the like and output.

  In the present embodiment, the distance information from the light source 13 ′ to each power pole 1 stored in the storage medium is the power pole 1 in order from the sales office M when laying the power pole and overhead wire (electric wire). Each time it is installed and connected by the connecting optical fiber r, the distance from the light source 13 ′ is measured with an OTDR measuring instrument and sequentially stored in a storage medium, but it is not necessary to be limited to this. After all the utility poles and overhead wires are arranged, the data may be input to the storage medium.

  In this way, by monitoring at the sales office M, which performs maintenance of the utility pole 1, etc., when a breakage of the utility pole 1 without a power failure occurs due to a car collision or storm, etc., a report from the perpetrator or witness Even if the power pole 1 is not broken, the utility pole manager can instantly recognize the presence or absence of the breakage of the utility pole 1 or the location of the broken utility pole 1 and the worker can immediately be dispatched to repair the corresponding utility pole 1. It becomes like this.

  The utility pole breakage status monitoring system of the present invention and the utility pole used in the utility pole breakage status monitoring system are not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention. Of course.

  For example, as shown in FIG. 6, in this embodiment, the descending portion 3 b and the ascending portion 3 c of the optical fiber 3 embedded in the utility pole main body 2 are positioned on the four sides of the planar power pole main body 2. (See FIGS. 6 (a) and 6 (b)), but there is no need to be limited to this, and the pair of descending parts 3b and ascending parts 3c have a predetermined interval. However, they may be embedded so as to be substantially parallel (see FIGS. 6C and 6D). Even if it does in this way, if the electric pole main body 2 is installed in the vicinity of the wall W, for example, a force is not applied to the electric pole main body 2 from the direction facing the wall W (such as an automobile colliding). Therefore, it is not necessary to embed the optical fiber 3 in such a direction, and the amount of the optical fiber 3 to be used can be reduced by reducing the descending portion 3b and the ascending portion 3c of the optical fiber 3 to be embedded in this way. Manufacturing costs can be reduced (cost savings can be achieved).

  In the present embodiment, the linear descending portion 3b and the ascending portion 3c are embedded over almost the entire area from the lower end portion to the upper end portion of the utility pole body 2, but it is not necessary to be limited to this. That is, when a horizontal force is applied to the utility pole 1 and it breaks, the force concentrates near the boundary with the ground, so the part often breaks. In addition, even when a car or the like collides, since it collides at a position close to the ground, the possibility of breakage at the upper and lower ends of the utility pole 1 is extremely low. Therefore, as shown in FIG. The upper end of the rising portion 3 c may be set closer to the center than the upper end of the utility pole body 2. Moreover, the lower end part (downward side connection part 3d) of the descending part 3b and the ascending part 3c is a position buried in the ground when the utility pole body 2 is erected on the ground, that is, a position on the ground side from the ground. If so, it may not be near the lower end of the utility pole body 2.

  Further, in the present embodiment, the descending portion 3b or the ascending portion 3c of the optical fiber 3 is embedded so as to descend or rise linearly along the vertical direction of the utility pole body 2, but is not limited thereto. There is no need, and as shown in FIG. 7B, for example, the descending portion 3 b ′ may be embedded in a spiral shape that descends along the circumferential direction of the utility pole body 2. By being embedded in this way, the optical fiber 3 (3b ′) is embedded over the entire periphery of the utility pole body 2, so that no matter which direction the automobile collides with the utility pole body 2, it can break. The possibility of strong bending in the optical fiber is high, and the sensitivity for detecting breakage of the utility pole 1 is increased. Further, the helical pitch need not be constant. In the vicinity of the ground where there is a high possibility of breakage, the pitch of the helix may be decreased to increase the detection sensitivity of breakage, and the pitch may be increased for a portion that is less likely to break than this portion. By doing in this way, the usage amount of an optical fiber can be reduced and the cost can be reduced while increasing the detection sensitivity of a portion with a high possibility of breakage.

  In the present embodiment, the optical power meter 11 and the OTDR measuring device 12 are connected to one end of the optical signal path L drawn into the sales office M as a light detecting means, but this is switchable. It is not necessary to be limited to the above, and only one of the optical power meter 11 and the OTDR measuring device may be connected. When only the optical power meter 11 is connected, the optical power meter 11 detects the attenuation of the light reception level of the optical signal from the optical signal path L, so that any one of the power poles 1 on the optical signal path L is detected. The sales office M can recognize that the breakage has occurred. When only the OTDR measuring device 12 is connected, the OTDR measuring device 12 monitors the constant waveform of the optical signal from the optical signal path L, and if there is a waveform abnormality, the distance to the abnormal location (OTDR measurement). The distance from the tester to the broken pole 1, more specifically, the distance from the light source 13 ′ built in the OTDR measuring instrument to the location where the optical fiber 3 embedded in the pole 1 is strongly bent) In place M.

1 shows a schematic perspective perspective view in which a part of a utility pole according to the present embodiment is omitted. FIG. The block diagram of the utility pole breakage condition monitoring system which concerns on the embodiment is shown. The block diagram of the optical signal path | route arrange | positioned along the electric wire network provided with the some branch concerning the embodiment is shown. The block diagram when a motor vehicle collides with the utility pole of the utility pole broken condition monitoring system which concerns on the embodiment is shown. (A) of the output part of the utility pole breakage situation monitoring system according to the embodiment shows a monitor screen for displaying character information, and (b) shows a monitor screen for displaying map information. (B) of the utility pole according to the embodiment shows a cross-sectional view, (b) shows a schematic perspective view with a part omitted, and (c) of the utility pole according to another embodiment shows a cross-sectional view. (D) shows a perspective view with a part omitted. (B) of the electric pole according to another embodiment is a schematic perspective view in which a part of the electric pole in which the optical fiber is not embedded in the upper and lower ends is omitted, and (b) is a spiral part of the descending part of the optical fiber. The schematic perspective view which abbreviate | omitted one part of the utility pole currently embedded in is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Telephone pole, 2 ... Telephone pole main body, 3 ... Optical fiber, 3a ... Connection end part, 3b, 3b '... Lowering part, 3c ... Rising part, 3d ... Lower side connection part, 3e ... Upper side connection part, 4 ... Connection Means (optical outlet), 5 ... Connection means (optical outlet), 10 ... Electric pole breakage monitoring system, 11 ... Optical power meter (optical signal detection means), 12 ... OTDR measuring device (optical signal detection means), 13, 13 '... light source, 14 ... output means (monitor), 15 ... arithmetic processing unit, M ... business office, L, L1, L2, L3, L4 ... optical signal path, r ... connecting optical fiber

Claims (11)

A utility pole comprising a pole-shaped utility pole body, an optical fiber continuous from one end to the other end and at least partially embedded in the utility pole body, and connection means respectively provided at both ends of the optical fiber,
The buried portion of the optical fiber includes at least a pair of a descending portion that is directed downward and an upward portion that is directed upward with respect to the utility pole body, and each lower end portion of the pair of descending portions and the elevated portion is provided with a utility pole. The utility poles are connected to each other at positions where they are buried in the ground.   The descending portion is embedded in a straight line along the vertical direction of the utility pole body, and the rising portion is embedded substantially parallel to the descending portion and the circumferential direction of the utility pole body at a predetermined interval. Item 1. The utility pole according to item 1.   3. The utility pole according to claim 2, wherein the pair of descending portions and the ascending portions are embedded in two pairs, and each descending portion or the ascending portion is embedded at four locations at substantially equal intervals in the circumferential direction of the utility pole body.   2. The utility pole according to claim 1, wherein the optical fiber is embedded in a spiral shape so that at least one and at least a part of the descending portion or the ascending portion is lowered or raised along the circumferential direction of the utility pole body.   The utility pole according to any one of claims 1 to 4, wherein the connection means is an optical outlet attached to a peripheral side surface of the utility pole body. A plurality of utility poles connected in such a manner that embedded optical fibers constitute a single optical signal path, and test light is incident from one end of the optical signal path. A utility pole breakage monitoring system comprising a light source and an optical signal detection means disposed at least one of one end and the other end of the optical signal path,
An electric pole breakage state monitoring system, wherein a broken electric pole is detected by detecting an optical signal from the optical signal path based on test light incident from the light source.   7. The utility pole breakage monitoring system according to claim 6, wherein the optical signal detection means is an optical power meter installed at the other end of the optical signal path.   7. The utility pole breakage monitoring system according to claim 6, wherein the optical signal detection means is an OTDR measuring device installed at one end of the optical signal path.   A light source is further installed at the other end of the optical signal path, and the optical signal detection means is configured by connecting an optical power meter and an OTDR measuring device to one end of the optical signal path in a switchable manner. When a power meter is connected, test light is incident from a light source at the other end of the optical signal path, and when an OTDR measuring device is connected, test light is transmitted from a light source at one end of the optical signal path. The telephone pole breakage status monitoring system according to claim 6, wherein the power pole is incident.   A storage medium storing at least a power pole number of each power pole, position information, and distance information on the optical signal path from the light source; distance information on the optical signal path from the light source detected by the OTDR measuring instrument; and the storage medium The arithmetic processing part which compares the distance information on the optical signal path from the light source of each utility pole which is memorize | stored, and the output part which outputs at least applicable telephone pole number and position information as a result of the comparison, or The telephone pole breakage status monitoring system according to 9.   The storage medium further includes map information, the arithmetic processing unit compares position information of the utility pole or distance information from a light source and the map information, and the output unit corresponds to the position of the utility pole of the map information. The telephone pole breakage condition monitoring system according to claim 10, wherein a part to be output is output.

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