JP2014031158A - Trolley wire wear detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a wear state of a trolley wire with high accuracy while preventing the trolley wire from being broken at an overlap place.SOLUTION: For a trolley wire wear detection device 1, a tension resistance auxiliary body 2 which is parallel with a trolley wire T1 (T2) and has a predetermined length is fixed on and along the trolley wire at an overlap place by using an ear 3, and the auxiliary body 2 is made of a material which is lightweight and has high tension resistance performance. An optical fiber 4a of a strain sensor 4 which detects tensile strain of the auxiliary body 2 is fixed in the auxiliary body 2 by penetrating along the length. When the trolley wire T1 (T2) decreases in sectional area owing to its wear, the tension that the auxiliary body 2 is in charge of instead of the trolley wire T1 (T2) increases and tensile strain is thereby generated in the optical fiber 4a as well as the auxiliary body 2, so the strain sensor 4 detects the wear state of the trolley wire T1 (T2) by making good use of the generation of the tensile strain. A measuring instrument 6 including a strain measurement part of the strain sensor 4 is fitted onto a column P1 where the trolley wire T1 (T2) is anchored.

Description

  The present invention relates to a trolley wire wear detection device for monitoring a wear state of an end portion of a trolley wire at an overlap portion of a train line.

  Conventionally, an optical fiber composite trolley wire including an optical fiber is known (Patent Document 1). In this trolley wire, a strain sensor including an optical fiber for detecting a change in elongation strain due to wear of the trolley wire body is provided in the trolley wire body.

JP 2005-132277 A

In the transition section where the train line overlaps, the wear is severe due to the impact at the time of contact with the pantograph. On the other hand, it is necessary to prevent disconnection due to wear of the trolley wire at the location, but even if the conventional optical fiber composite trolley wire is applied to the location, sufficient strength to prevent disconnection against tension It is not necessary to have a built-in processing of the optical fiber in the trolley wire, the processing is not easy, and the existing trolley wire needs to be replaced.
Therefore, the present invention provides the strength to prevent disconnection due to wear of the trolley wire, can detect the wear of the trolley wire with high accuracy, and can be retrofitted to an existing trolley wire without requiring processing of the trolley wire itself. It is an object to provide a trolley wire wear detection device.

In order to solve the above-mentioned problem, the present invention fixes the tension-resistant auxiliary body 2 that shares the tension applied to the trolley line T1 so as to be parallel to the trolley line T1 in the overlapping part of the train line, and the extension strain of the auxiliary body By detecting this, the trolley wire wear detection device 1 is configured to detect the wear state of the trolley wire T1. The optical fiber 4a of the optical fiber type strain sensor 4 parallel to the auxiliary body 2 is fixed to the auxiliary body 2, and the distortion of the auxiliary body 2 is detected by receiving the reflected light or transmitted light in the optical fiber 4a. Thereby, the wear state of the trolley wire T1 is detected.
The optical fiber 4 a of the strain sensor 4 is built in the auxiliary body 2.
A temperature sensor for correcting the temperature of the measured strain value by the strain sensor 4 is provided.
The temperature sensor releases a part of the optical fiber 4a of the optical fiber strain sensor 4 from the restraint of the auxiliary body 2, and detects the temperature from the reflected light or transmitted light in the optical fiber.
The optical fiber 4a of the strain sensor 4 is connected to the measurement unit 6 disposed on the support P1 that holds the train line.

  According to the present invention, since the tension is shared by the tension-resistant auxiliary body according to the degree of wear of the trolley wire, it can have mechanical strength that reliably prevents disconnection due to wear of the trolley wire, By detecting the tension applied to the body, the wear state of the trolley wire can be monitored with high accuracy, and it can be retrofitted without requiring processing the trolley wire itself.

(A) is a conceptual diagram of train line overlap, and (B) is a schematic front view. It is a front view of the tension | tensile_strength auxiliary body attached to the trolley wire. (A) is a front view of a tension | pulling resistance auxiliary body and an ear, (B) is the side view. It is sectional drawing of a tension | pulling resistance auxiliary body. It is a schematic block diagram of the trolley wire wear detection apparatus which concerns on this invention. It is a block diagram of a measuring device. The schematic block diagram of the trolley wire abrasion detection apparatus which concerns on other embodiment, (B) is the same front view. It is a block diagram of the measuring device which concerns on other embodiment. The tension | tensile_strength auxiliary | assistant rope and ear which concern on other embodiment are shown, (A) is a front view, (B) is sectional drawing.

An embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1 (A) and 1 (B), the tension-resistant auxiliary body 2 is parallel to the trolley line T1 or T2 or both trolley lines T1 and T2 with respect to the trolley lines T1 and T2 that are parallel at the overlapping part of the train line. Fixed.

  As shown in FIG. 2, the auxiliary body 2 is fixed to the upper side of the trolley line T1 at intervals in the longitudinal direction by a plurality of lightweight ears 3, for example, on the trolley line T1 at the relevant location. The auxiliary body 2 is composed of a rod-shaped body made of a material having a light weight and high tensile resistance, such as FRP, aramid fiber, and PBO fiber. The auxiliary body 2 is configured such that a plurality of divided bodies 2a are joined together at the ear 3 and continuously integrated. As shown in FIGS. 3 (A) and 3 (B), the ear 3 has a configuration in which a pair of left and right ear pieces 3a each provided with a trolley wire gripping recess 3c and an auxiliary body gripping claw 3d are tightened with a through bolt 3b.

  As shown in FIGS. 3 and 4A, the optical fiber 4a of the optical fiber strain sensor 4 passes through the auxiliary body 2 in the length direction. When the cross-sectional area of the optical fiber type strain sensor 4 is reduced due to wear of the trolley wire T1, the tensile force shared by the auxiliary body 2 increases, so that an elongation distortion occurs with the auxiliary body 2. Therefore, the distortion is applied to the optical fiber 4a. Is detected and the wear state of the trolley wire T1 is monitored. The strain sensor 4 includes an FBG method using Bragg scattering by a multiplexed fiber grating, a method using Brillouin scattering (BOTDR, BOCDA, BOCDR, etc.), an HC method using Rayleigh scattering and a hetero-core structure optical fiber sensor, and the like. is there. The optical fiber 4a is connected to the measuring unit 4b of the measuring instrument 6 as shown in FIG.

  The optical fiber strain sensor 4 has a measurement value that varies depending on the temperature depending on the measurement method employed, and the measurement value is generally temperature-corrected as necessary. In this case, as shown in FIGS. 3A and 5, the optical fiber 5 a of the optical fiber type temperature sensor 5 is attached to the end of the auxiliary body 2. As shown in FIG. 5, these sensors 4 and 5 are connected to a measuring instrument 6 on a column P1 on which a tension adjusting device R is installed via an insulator I for holding a trolley wire T1, a holding wire W, and a yoke Y. The As shown in FIG. 6, this measuring instrument 6 includes a power supply unit 7 that supplies power for operation, a strain measurement unit 4 b that is connected to the optical fiber 4 a of the strain sensor 4, and a distortion sensor 4 that is employed. The temperature measuring unit 5b to which the optical fiber 5a of the temperature sensor 5 required according to the above is connected, and the communication unit 8 for outputting the measurement result to the outside are provided.

  In this trolley wire wear detection device 1, the auxiliary body 2 is fixed in parallel to the overlapping trolley wire T1, but the auxiliary body 2 and the ear 3 are lightweight and without applying a large load to the trolley wire T1, The auxiliary body 2 shares the tension together with the trolley wire T1. The tension applied to the auxiliary body 2 increases in accordance with the wear of the trolley wire T1, but the auxiliary body 2 has high tensile strength performance, so that it receives a tension instead of the trolley wire T1 and prevents disconnection due to the wear of the trolley wire T1. The wear state of the trolley wire T1 is monitored by the strain sensor 4 detecting the elongation strain of the auxiliary body 2 through the optical fiber 4a built in the auxiliary body 2. The measured strain value detected by the strain sensor 4 is corrected by the temperature detected by the temperature sensor 5 as necessary, and is output from the communication unit 8 and is worn by the trolley wire T1 at a remote power command station. Is recorded as maintenance data, and appropriate response measures are issued.

  Another embodiment is shown in FIG. In this embodiment, instead of the configuration in which the optical fiber 4a is passed through the auxiliary body 2 in the previous embodiment, the optical fiber 4a is provided in the longitudinal direction provided on the outer peripheral surface of the auxiliary body 2 as shown in FIG. In this configuration, it is inserted into the groove and fixed, and is parallel to the auxiliary body 2. In this optical fiber type strain sensor 4 as well, in the same manner as in the previous embodiment, when the cross-sectional area is reduced due to wear of the trolley wire T1, the tension shared by the auxiliary body 2 is increased. An elongation strain is generated, and this strain is detected. The optical fiber strain sensor 4 includes an FBG 4c between the ears 3 and 3 of the optical fiber 4a. The optical fiber 5a at the end separated from the auxiliary body 2 and released from its restraint is caused to function as the optical fiber type temperature sensor 5 provided with the FBG 5c. In this case, as shown in FIG. 8, the measuring unit 5 b of the optical fiber type temperature sensor 5 is configured integrally with the measuring unit 4 b in the measuring instrument 6.

  Another embodiment is shown in FIG. Auxiliary rope 9 made of a wire material of the above-mentioned material is used in place of the tensile strength auxiliary body 2 in the previous embodiment, and is fixed to the upper side of the trolley wire T at intervals in the longitudinal direction by a plurality of ears 10. It is. The optical fiber 4a of the strain sensor 4 applied to the auxiliary rope 9 is fixed to the trolley wire T by the ear 10 in parallel with the outside of the auxiliary rope 9 instead of the configuration built in the previous embodiment. Also in this embodiment, when the strain sensor 4 detects the elongation strain of the auxiliary rope 9 through the optical fiber 4a, the wear state of the trolley wire T1 can be monitored.

DESCRIPTION OF SYMBOLS 1 Trolley wire wear detection apparatus 2 Tension resistant auxiliary body 3 Ear 4 Strain sensor 4a Optical fiber 4b Strain measuring part 5 Temperature sensor 5a Optical fiber 5b Temperature measuring part 6 Measuring instrument 9 Auxiliary rope 10 Ear T1 Trolley line

Claims (5)

A tension-resistant auxiliary body that is fixed in parallel to the trolley line at the overlapping part of the train line and shares the tension applied to the trolley line, and detects the extension strain of the auxiliary body due to wear of the trolley line, thereby detecting the trolley line In the trolley wire wear detection device that detects the wear state of
An optical fiber type strainer comprising an optical fiber fixed in parallel to the auxiliary body, and detecting the wear state of the trolley wire by detecting the distortion of the auxiliary body by receiving reflected light or transmitted light passing through the optical fiber. A trolley wire wear detection device comprising a sensor.   The trolley wire wear detection device according to claim 1, wherein an optical fiber is built into the auxiliary body of the strain sensor.   The trolley wire wear detection device according to claim 1, further comprising a temperature sensor for correcting a temperature of a strain measurement value obtained by the optical fiber strain sensor.   The temperature sensor releases a part of the optical fiber of the optical fiber type strain sensor fixed to the auxiliary body from the restraint of the auxiliary body, and detects the temperature by receiving reflected light or transmitted light passing through the optical fiber. The trolley wire wear detection apparatus according to claim 3.   5. The trolley wire wear detection device according to claim 1, wherein an optical fiber of the optical fiber type strain sensor is connected to a measurement unit attached to a support column that holds the train line.

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