High-precision optical fiber monitoring unit

Abstract

The invention discloses a high-precision optical fiber monitoring unit, and relates to the technical field of track monitoring. The device comprises a track, a stranded wire body, a sub-control box and a power connection device, the length of the stranded wire body is set to be 15 km, the stranded wire body is composed of a communication optical fiber, a sensing optical fiber and a steel strand, a buried vibration sensor optical cable is arranged in the ground on the outer side of the track, and the sub-control box is arranged at the end of the stranded wire body. A voltage and current converter, a vibration monitoring host, a temperature monitoring host, a processor, a positioning module, a data comparison module and a data storage module are arranged in the branch control box. The 15km monitoring unit is designed, the monitoring unit can be used for monitoring a line with a certain length, the detection precision is ensured, the accuracy of the whole network can be greatly improved through modularized networking, communication optical fibers are integrated, data can be output through the entity communication optical fibers, the data transmission stability can be improved, and the data transmission efficiency is improved. Therefore, the precision and the stability of the railway monitoring network are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of track monitoring, and in particular relates to a high-precision optical fiber monitoring unit. Background Art

[0002] Due to its ability to resist electromagnetic interference, withstand harsh environments, be easy to install and integrate, and perform large-length continuous distributed measurements, fiber optic sensing technology has been widely used in many fields such as railways, bridges, and mines. Distributed fiber acoustic sensing technology (DAS) uses the backward Rayleigh scattered light of the laser in optical fiber transmission to demodulate vibration signals, thereby sensing abnormal vibrations of structures along the line.

[0003] In the current electrical intelligent stranded wire networking system, the optical fiber is set at the axis of the stranded wire, and its length is relatively long. A single monitor is used for monitoring, such as the invention patent with application number 202310180531.2. However, due to the long length of the railway, and the current maximum continuous monitoring length of a fiber optic vibration monitoring host (DAS) is 50km, and the maximum continuous monitoring length of a temperature monitoring host (DTS) is 15km. If a longer optical fiber is set, poor accuracy is likely to occur. Summary of the invention

[0004] The purpose of the present invention is to provide a high-precision optical fiber monitoring unit. By designing a 15km monitoring unit, the monitoring unit can be used to monitor a certain length of line to ensure its detection accuracy. The modular networking can greatly improve the accuracy of the entire network. At the same time, the communication optical fiber is integrated into one, and data can be output through the physical communication optical fiber, which can improve the stability of data transmission, thereby improving the accuracy and stability of the railway monitoring network.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a high-precision optical fiber monitoring unit, comprising a track, a stranded wire body, a sub-control box, a power connection device and a large transformer; The length of the stranded wire body is set to 15 km, and the stranded wire body is composed of a communication optical fiber, a sensing optical fiber and a steel strand; An underground vibration sensor optical cable is provided in the ground outside the track; The sub-control box is arranged at the end of the stranded wire body, and is provided with a voltage-current converter, a vibration monitoring host, a temperature monitoring host, a processor, a positioning module, a data comparison module and a data storage module. The bottom of the sub-control box is provided with a linear live wire connector, a lower connection connector, a communication connector, a sensing connector and a neutral wire connector; The neutral line connector is connected to the track through a first external connector, the end of the communication optical fiber is connected to the communication connector, the end of the sensing optical fiber is connected to the sensing connector, and the lower connector is electrically connected to the buried vibration sensor optical cable through a second external connector; The power connection device includes a connection wire, a telescopic column and a support plate; The support plate is an L-shaped structure, the vertical side of the support plate is fixed to the outside of the sub-control box, the horizontal side of the support plate is located above the outside of the sub-control box, and a group of wire fixing seats are provided on the inner side of the horizontal side of the support plate; One end of the telescopic column is fixed to the horizontal side of the support plate through a first universal ball seat, and the other end of the telescopic column is connected to a connecting plate through a second universal ball seat, an arc-shaped connecting plate is fixed to the bottom of the connecting plate, and a spring is sleeved on the outside of the telescopic column; The connecting wire and the live wire connector are respectively connected to the input and output of the large transformer. The other end of the connecting wire is fixed to the connecting plate and electrically connected to the arc-shaped connecting plate. The connecting wire is fixed to the support plate through a wire fixing seat. The arc-shaped connecting plate is fixed on the steel strand and electrically connected to the steel strand.

[0006] Furthermore, it also includes a platform monitoring room, on which a plurality of monitoring units are connected in series, and the twisted wire bodies on the plurality of monitoring units are connected in series, and the communication optical fiber and the sensing optical fiber are branched out at the joints of two adjacent twisted wire bodies to be connected to the sub-control box.

[0007] Furthermore, the telescopic column consists of an inner tube and an outer tube, the ends of the inner tube and the outer tube are fixed to the balls on the first universal ball seat and the second universal ball seat, the ends of the inner tube and the outer tube are both provided with pads, and the spring end is fixed on the pads.

[0008] Furthermore, a wire fixing frame which is offset from the support plate is provided on the outside of the sub-control box, and the connecting wire is passed through and fixed at the end of the wire fixing frame.

[0009] Furthermore, bending wheels are fixed at both ends of the horizontal side of the support plate, the two wire fixing seats are located in the area between the two bending wheels, and the connecting wires bypass the two bending wheels.

[0010] Furthermore, a fixing seat is provided on the outer side of the vertical side of the support plate, and the fixing seat is fixed on the outer side of the sub-control box. A plurality of reinforcing ribs are linearly provided between the two sides of the vertical side of the support plate and the fixing seat.

[0011] Furthermore, a column connecting frame is provided on the back of the sub-control box, and the column connecting frame is an I-shaped structure or a ladder-shaped structure.

[0012] Furthermore, the steel strands are wrapped around the communication optical fiber and the sensing optical fiber, and insulating layers are provided between the communication optical fiber, the sensing optical fiber and the steel strands.

[0013] Furthermore, an enclosure is provided at the bottom of the sub-control box, and the live wire connector, communication connector, sensing connector, neutral wire connector and lower connector are all located inside the enclosure.

[0014] The present invention has the following beneficial effects: (1) The present invention designs a 15km monitoring unit, which can be used to monitor a certain length of line to ensure its detection accuracy. The corresponding number of monitoring units are arranged according to the length of the railway. The modular networking can greatly improve the accuracy of the entire network. At the same time, the communication optical fiber is integrated into one, and data can be output through the physical communication optical fiber, which can improve the stability of data transmission, thereby improving the accuracy and stability of the railway monitoring network.

[0015] 92) The present invention adopts the design of buried vibration sensor optical cable, which is arranged on the outside of the track. Combined with the separately laid buried vibration sensor optical cable system, it can monitor the surrounding intrusion signals in real time, forming an air-ground integrated railway monitoring network, realizing the future smart railway function, and having very important practical significance for ensuring the safety and economy of future railway contact network.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a high-precision optical fiber monitoring unit of the present invention; Figure 2 It is a structural diagram of the sub-control box and the power connection device; Figure 3 This is a schematic diagram of the structure of the sub-control box and the power connection device from an upward perspective; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1-track, 2-stranded wire body, 3-sub-control box, 4-power connection device, 5-underground vibration sensor optical cable, 6-column connecting frame, 7-large transformer, 201-communication optical fiber, 202-sensing optical fiber, 203-steel strand, 301-live wire connector, 302-communication connector, 303-sensing connector, 304-neutral wire connector, 305-lower connector, 306-first external wiring, 307-second external wiring, 401-connecting wire, 402-telescopic column, 403-support plate, 404-wire fixing seat, 405-first universal ball seat, 406-second universal ball seat, 407-connecting plate, 408-arc connecting plate, 409-spring, 410-wire fixing frame, 411-fixed seat, 412-bending wheel, 413-enclosure. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-3 As shown, the present invention is a high-precision optical fiber monitoring unit, comprising a track 1, a stranded wire body 2, a sub-control box 3, a power connection device 4 and a large transformer 7; The length of the stranded wire body 2 is set to 15 km, and the stranded wire body 2 is composed of a communication optical fiber 201, a sensing optical fiber 202, and a steel strand 203; An underground vibration sensor optical cable 5 is provided in the ground outside the track 1; The sub-control box 3 is arranged at the end of the stranded wire body 2, and a voltage-current converter, a vibration monitoring host, a temperature monitoring host, a processor, a positioning module, a data comparison module and a data storage module are arranged in the sub-control box 3. A linear live wire connector 301, a lower connecting connector 305, a communication connector 302, a sensing connector 303 and a neutral wire connector 304 are arranged at the bottom of the sub-control box 3; The neutral line connector 304 is connected to the track 1 through the first external wire 306, the end of the communication optical fiber 201 is connected to the communication connector 302, the end of the sensing optical fiber 202 is connected to the sensing connector 303, and the lower connector 305 is electrically connected to the buried vibration sensor optical cable 5 through the second external wire 307; The power connection device 4 includes a connection line 401, a telescopic column 402 and a support plate 403; The support plate 403 is an L-shaped structure, the vertical side of the support plate 403 is fixed to the outside of the sub-control box 3, the horizontal side of the support plate 403 is located above the outside of the sub-control box 3, and a group of wire fixing seats 404 are provided inside the horizontal side of the support plate 403; One end of the telescopic column 402 is fixed to the horizontal side of the support plate 403 through a first universal ball seat 405, and the other end of the telescopic column 402 is connected to a connecting plate 407 through a second universal ball seat 406. An arc-shaped connecting plate 408 is fixed to the bottom of the connecting plate 407. A spring 409 is sleeved on the outside of the telescopic column 402. The connecting wire 401 and the live wire connector 301 are respectively connected to the input and output of the large transformer 7. The other end of the connecting wire 401 is fixed to the connecting plate 407 and electrically connected to the arc connecting plate 408. The connecting wire 401 is fixed to the support plate 403 through the wire fixing seat 404. The arc connecting plate 408 is fixed on the steel strand 203 and electrically connected to the steel strand 203.

[0021] It also includes a platform monitoring room, on which several monitoring units are connected in series, and the twisted wire bodies 2 on the several monitoring units are connected in series, and the communication optical fiber 201 and the sensing optical fiber 202 are branched at the joints of two adjacent twisted wire bodies 2 to be connected to the sub-control box 3.

[0022] Among them Figure 2-3 As shown, the telescopic column 402 consists of an inner tube and an outer tube, the ends of the inner tube and the outer tube are fixed to the balls on the first universal ball seat 405 and the second universal ball seat 406, and the ends of the inner tube and the outer tube are both provided with pads, and the end of the spring 409 is fixed on the pads.

[0023] Among them Figure 2-3 As shown, a wire fixing frame 410 which is offset from the support plate 403 is provided on the outside of the sub-control box 3 , and the connecting wire 401 passes through and is fixed at the end of the wire fixing frame 410 .

[0024] Among them Figure 2-3 As shown, bending wheels 412 are fixed to both ends of the horizontal side of the support plate 403 , and the two wire fixing seats 404 are located in the area between the two bending wheels 412 , and the connecting wire 401 passes around the two bending wheels 412 .

[0025] Among them Figure 2-3 As shown, a fixing seat 411 is provided on the outer side of the vertical side of the support plate 403 , and the fixing seat 411 is fixed on the outer side of the sub-control box 3 . A plurality of reinforcing ribs are linearly provided between the two sides of the vertical side of the support plate 403 and the fixing seat 411 .

[0026] Among them Figure 2-3 As shown, a column connecting frame 6 is provided on the back of the sub-control box 3, and the column connecting frame 6 is an I-shaped structure or a ladder-shaped structure.

[0027] The steel strand 203 is wrapped around the outside of the communication optical fiber 201 and the sensing optical fiber 202 , and an insulating layer is provided between each of the communication optical fiber 201 , the sensing optical fiber 202 and the steel strand 203 .

[0028] Among them Figure 3As shown, a baffle 413 is provided at the bottom of the sub-control box 3 , and the live wire connector 301 , the communication connector 302 , the sensing connector 303 , the neutral wire connector 304 and the lower connector 305 are all located inside the baffle 413 .

[0029] The working principle of the present invention is as follows: the sensing optical fiber 303 monitors the situation, and the data comparison module compares the monitoring data with the data pre-stored in the data storage module. If it is out of range, it indicates that the data is abnormal. The abnormal information is transmitted to the platform monitoring room through the communication optical fiber 201. The staff receives the abnormal information and performs manual inspection and eliminates the abnormality according to the location displayed by the positioning module.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision optical fiber monitoring unit, comprising a track (1) and a stranded wire body (2), characterized in that: It also includes a sub-control box (3), a power connection device (4) and a large transformer (7); The length of the stranded wire body (2) is set to 15 km, and the stranded wire body (2) is composed of a communication optical fiber (201), a sensing optical fiber (202) and a steel strand (203); An underground vibration sensor optical cable (5) is provided in the ground outside the track (1); The sub-control box (3) is arranged at the end of the stranded wire body (2), and is provided with a voltage-current converter, a vibration monitoring host, a temperature monitoring host, a processor, a positioning module, a data comparison module and a data storage module. The bottom of the sub-control box (3) is provided with a linear live wire connector (301), a lower connection connector (305), a communication connector (302), a sensing connector (303) and a neutral wire connector (304); The neutral line connector (304) is connected to the track (1) via a first external wire (306), the end of the communication optical fiber (201) is connected to the communication connector (302), the end of the sensing optical fiber (202) is connected to the sensing connector (303), and the lower connector (305) is electrically connected to the buried vibration sensor optical cable (5) via a second external wire (307); The power connection device (4) comprises a power connection wire (401), a telescopic column (402) and a support plate (403); The support plate (403) is an L-shaped structure, the vertical side of the support plate (403) is fixed to the outside of the sub-control box (3), the horizontal side of the support plate (403) is located above the outside of the sub-control box (3), and a group of wire fixing seats (404) are provided inside the horizontal side of the support plate (403); One end of the telescopic column (402) is fixed to the horizontal side of the support plate (403) via a first universal ball seat (405); the other end of the telescopic column (402) is connected to a connecting plate (407) via a second universal ball seat (406); an arc-shaped connecting plate (408) is fixed to the bottom of the connecting plate (407); and a spring (409) is sleeved on the outside of the telescopic column (402); The connection wire (401) and the live wire connector (301) are respectively connected to the input and output of the large transformer (7); the other end of the connection wire (401) is fixed to the connection plate (407) and electrically connected to the arc-shaped connection plate (408); the connection wire (401) is fixed to the support plate (403) via a wire fixing seat (404); the arc-shaped connection plate (408) is fixed to the steel strand (203) and electrically connected to the steel strand (203).

2. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: It also includes a platform monitoring room, on which a plurality of monitoring units are connected in series, and the twisted wire bodies (2) on the plurality of monitoring units are connected in series, and the communication optical fiber (201) and the sensing optical fiber (202) are branched at the joints of two adjacent twisted wire bodies (2) to form a branch connection connected to a sub-control box (3).

3. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: The telescopic column (402) is composed of an inner tube and an outer tube, the ends of the inner tube and the outer tube are fixed to the balls on the first universal ball seat (405) and the second universal ball seat (406), the ends of the inner tube and the outer tube are both provided with pads, and the end of the spring (409) is fixed to the pads.

4. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: The outer side of the sub-control box (3) is provided with a wire fixing frame (410) which is offset from the support plate (403), and the connecting wire (401) passes through and is fixed at the end of the wire fixing frame (410).

5. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: Bending wheels (412) are fixed to both ends of the horizontal edge of the support plate (403), the two wire fixing seats (404) are located in the area between the two bending wheels (412), and the connection wire (401) passes around the two bending wheels (412).

6. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: A fixing seat (411) is provided on the outside of the vertical side of the support plate (403), the fixing seat (411) is fixed on the outside of the sub-control box (3), and a plurality of reinforcing ribs are linearly provided between the two sides of the vertical side of the support plate (403) and the fixing seat (411).

7. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: The sub-control box (3) is provided with a column connecting frame (6) at the back, and the column connecting frame (6) is an I-shaped structure or a ladder-shaped structure.

8. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: The steel strand (203) is wrapped around the outside of the communication optical fiber (201) and the sensing optical fiber (202), and an insulation layer is provided between each of the communication optical fiber (201), the sensing optical fiber (202) and the steel strand (203).

9. A high-precision optical fiber monitoring unit according to claim 1, characterized in that: The sub-control box (3) is provided with an enclosure (413) at the bottom, and the live wire connector (301), the communication connector (302), the sensing connector (303), the neutral wire connector (304) and the lower connecting connector (305) are all located inside the enclosure (413).

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