Weak current trunking damage detection system using existing redundant optical fiber

Abstract

The application discloses a weak current cable slot damage detection system using existing redundant optical fibers, and belongs to the technical field of optical fiber sensing. The system comprises a vibration source, the vibration source is arranged on the surface of the weak current cable slot, and the vibration source is used for driving the existing and redundant optical fiber line in the weak current cable slot to vibrate; a signal analysis device is connected with the optical fiber line, the signal analysis device is used for collecting detection signals of the optical fiber line, determining vibration characteristic parameters of different positions on the optical fiber line according to the detection signals, and determining whether the weak current cable slot is damaged according to the vibration characteristic parameters. The application aims to utilize the optical fiber vibration sensing characteristics, realize damage detection based on the existing redundant optical fiber line of the weak current cable slot, does not need to additionally deploy optical fibers, and the sensing optical fiber does not need to be closely attached to the surface of the cable slot, so that the deployment difficulty of the weak current cable slot damage detection system is reduced, and the damage detection effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber sensing, and particularly relates to a weak current wire slot damage detection system using existing redundant optical fibers. BACKGROUND

[0002] At present, various weak current wires such as network wires, telephone wires and television wires are indispensable in daily life of every family, and the weak current wires are usually arranged in weak current wire slots for unified wiring planning, and even the weak current wire slots are hidden in walls. Since the weak current wire slots are arranged in a hidden manner and are difficult to be directly observed, it is necessary to detect damages of the weak current wire slots to ensure the safety in use.

[0003] The current damage detection method generally uses optical fiber sensing to detect stress on the optical fiber, so that the damage can be found in time when the wire slot is deformed due to stress. However, this method requires that the optical fiber is closely attached to the surface of the measured object, and the detection effect is easily affected by the coupling degree of the optical fiber and the surface deformation of the measured object, thereby affecting the damage detection effect.

[0004] In addition, in order to adapt to the future expansion demand of optical fibers and avoid high costs caused by repeated laying of optical fibers, the communication company will lay more optical fiber lines than required. Therefore, there are a large number of laid but unused optical fiber lines in the weak current wire slots of existing buildings, and there is a waste of optical fiber line resources. SUMMARY

[0005] The main purpose of the present application is to provide a weak current wire slot damage detection system using existing redundant optical fibers, which uses the vibration sensing characteristics of the optical fiber to realize damage detection based on the existing redundant optical fiber lines of the weak current wire slot, without the need for additional deployment of optical fibers, and the sensing optical fiber does not need to be closely attached to the surface of the wire slot, thereby reducing the deployment difficulty of the weak current wire slot damage detection system and improving the damage detection effect.

[0006] To achieve the above purpose, the present application provides a weak current wire slot damage detection system using existing redundant optical fibers, which comprises:

[0007] a vibration source arranged on the surface of the weak current wire slot, the vibration source being used to drive the existing and redundant optical fiber line in the weak current wire slot to vibrate;

[0008] a signal analysis device connected with the optical fiber line, the signal analysis device being used to collect a detection signal of the optical fiber line, determine vibration characteristic parameters of different positions on the optical fiber line according to the detection signal, and determine whether the weak current wire slot has damage according to the vibration characteristic parameters.

[0009] Optionally, the weak current wire slot damage detection system using existing redundant optical fibers further comprises:

[0010] A plurality of fixing members are arranged on the surface of the weak current wire duct along the axial direction of the weak current wire duct, the bottom end of the fixing member is fixedly connected with the inner surface of the weak current wire duct, and the top end of the fixing member is provided with a limiting groove for fixing the optical fiber line.

[0011] Optionally, the vibration source is arranged at a predicted risk position on the surface of the weak current wire duct, and the predicted risk position is a position where the probability of damage in the weak current wire duct is greater than a preset value.

[0012] Optionally, the vibration source is arranged on the inner surface or the outer surface of the weak current wire duct.

[0013] Optionally, the number of vibration sources is a plurality, and the signal analysis device is further configured to determine a plurality of vibration characteristic parameters at different positions on the optical fiber line according to the detection signal, and determine whether there is a vibration characteristic parameter representing damage of the weak current wire duct in the plurality of vibration characteristic parameters.

[0014] Optionally, the signal analysis device is further configured to input the vibration characteristic parameter into a neural network model, and determine whether the weak current wire duct is damaged according to the output result of the neural network model.

[0015] Optionally, the signal analysis device is further configured to determine the damage position of the weak current wire duct according to the vibration characteristic parameter when the weak current wire duct is damaged.

[0016] Optionally, the signal analysis device is further configured to determine the mapping relationship between the position on the surface of the weak current wire duct and the position on the optical fiber line, and the vibration characteristic parameters, according to the position of each vibration source and the corresponding vibration characteristic parameter when each vibration source is turned on.

[0017] Optionally, the signal analysis device is further configured to determine a target vibration parameter matching a preset damage parameter in the plurality of vibration characteristic parameters, and determine the damage position of the weak current wire duct according to the target vibration parameter and the mapping relationship.

[0018] Optionally, the weak current wire duct damage detection system using the existing redundant optical fiber further comprises the optical fiber line, and the optical fiber line is a single-mode optical fiber.

[0019] The application provides a weak current cable slot damage detection system using existing redundant optical fibers, which comprises a vibration source arranged on the surface of the weak current cable slot, the vibration source is used for driving the vibration of the existing and redundant optical fiber line in the weak current cable slot, the vibration is initiated from the vibration source, the vibration is transmitted through the surface of the weak current cable slot and finally drives the vibration of the optical fiber line, and the vibration sensing of the optical fiber is used to detect the surface condition of the weak current cable slot; the system further comprises a signal analysis device connected with the optical fiber line, which is used for collecting the detection signal of the optical fiber line, determining the vibration characteristic parameters of different positions on the optical fiber line according to the detection signal, and determining whether the weak current cable slot is damaged according to the vibration characteristic parameters. Compared with the damage detection using the optical fiber strain sensor, the optical fiber vibration sensor can use the existing redundant optical fiber in the weak current cable slot, and does not require the whole optical fiber to be close to the weak current cable slot, so that the deployment difficulty is reduced, and the damage detection effect is not easily affected by the deployment effect, and the damage detection effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 FIG. 1 is a structural module schematic diagram of an embodiment of the weak current cable slot damage detection system using existing redundant optical fibers according to the application;

[0021] Figure 2 FIG. 2 is a structural module schematic diagram of another embodiment of the weak current cable slot damage detection system using existing redundant optical fibers according to the application.

[0022] DETAILED DESCRIPTION

[0023] Reference Name Reference Name 1 Low-voltage trunking 4 Signal analysis device 2 Fiber optic line 5 Fastener 3 Vibration source

[0024] The implementation, functional characteristics and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0026] Reference Figure 1 An embodiment of the weak current cable slot damage detection system using existing redundant optical fibers is provided in the application. In the embodiment, the weak current cable slot damage detection system using existing redundant optical fibers comprises:

[0027] A vibration source 3 is arranged on the surface of the weak current cable slot 1, and the vibration source 3 is used for driving the vibration of the optical fiber line 2 in the weak current cable slot 1.

[0028] The weak current cable slot 1 is a cable slot used for accommodating weak current cables, wherein the weak current cables include telephone lines, television lines and network lines and the like.

[0029] In the embodiment, the weak current wire duct 1 is a wire duct that has been packaged and is in use. Considering that disassembling the wire duct in use may affect the normal use of the wire therein, the weak current wire duct damage detection system in the embodiment is deployed without disassembling the weak current wire duct 1. The optical fiber wire 2 in the weak current wire duct 1 is a redundant optical fiber wire that already exists.

[0030] The vibration source 3 is a vibration device for emitting a vibration signal. Since the vibration source 3 is arranged on the surface of the weak current wire duct 1, a small vibration source such as a linear motor is selected considering the volume thereof. Since the vibration source 3 is arranged on the surface of the weak current wire duct 1, after the vibration source 3 emits a vibration signal, the vibration signal is transmitted to the surface of the weak current wire duct 1 and is transmitted from the surface of the weak current wire duct 1 to the optical fiber wire 2 in the weak current wire duct 1 through the air, and finally drives the optical fiber wire 2 to vibrate.

[0031] It should be noted that there is an optical signal on the optical fiber wire 2. When the vibration signal is transmitted to the optical fiber wire 2, the optical signal is modulated with the vibration signal to form a detection signal. Since the vibration signal is transmitted through the surface of the weak current wire duct 1, the vibration signal is different as the damage of the weak current wire duct 1 is different, and the detection signal formed is also different, thereby realizing the optical fiber vibration sensing to detect the damage of the weak current wire duct 1.

[0032] The signal analysis device 4 is connected with the optical fiber wire 2. The signal analysis device 4 is used to collect the detection signal of the optical fiber wire 2, determine the vibration characteristic parameters of different positions on the optical fiber wire 2 according to the detection signal, and determine whether the weak current wire duct 1 is damaged according to the vibration characteristic parameters.

[0033] The signal analysis device 4 is connected with the optical fiber wire 2 and is arranged at one end of the optical fiber wire 2 or the weak current wire duct 1, for example, in a computer room. The other end of the optical fiber wire 2 is connected to a user's home and does not need to be connected with the signal analysis device 4.

[0034] Optionally, the signal analysis device 4 further comprises an optical fiber vibration sensing demodulation module. After collecting the detection signal of the optical fiber wire 2, the received detection signal is demodulated, and the vibration characteristic parameters are the demodulation results.

[0035] Optionally, the vibration signal emitted by the vibration source 3 for detecting the damage of the weak current wire duct 1 is modulated with the optical signal to form a detection signal, which is transmitted to a signal analysis device 4 at a long distance and is demodulated by the signal analysis device 4 to obtain corresponding vibration characteristic parameters. The signal analysis device 4 obtains the vibration characteristic parameters of different positions on the optical fiber wire 2, and further determines whether the weak current wire duct 1 is damaged according to the vibration characteristic parameters.

[0036] The weak current cable slot damage detection system using the existing redundant optical fiber provided in the embodiment of the application comprises a vibration source 3 arranged on the surface of a weak current cable slot 1, the vibration source 3 is used to drive the existing and redundant optical fiber line 2 in the weak current cable slot 1 to vibrate, the vibration is initiated from the vibration source 3, the vibration is transmitted through the surface of the weak current cable slot 1 and finally drives the optical fiber line 2 to vibrate, so as to realize the weak current cable slot 1 surface condition sensing by optical fiber vibration sensing; the system further comprises a signal analysis device 4 connected with the optical fiber line 2, which is used to collect the detection signal of the optical fiber line 2, determine the vibration characteristic parameters of different positions on the optical fiber line 2 according to the detection signal, and determine whether the weak current cable slot 1 is damaged according to the vibration characteristic parameters. Compared with the damage detection by using the optical fiber strain sensing, the optical fiber vibration sensing can use the existing redundant optical fiber in the weak current cable slot, does not need to additionally deploy the optical fiber, the sensing optical fiber does not need to be closely attached to the surface of the cable slot, and the optical fiber as a whole does not need to be closely attached to the weak current cable slot, so that the deployment difficulty is reduced, and the damage detection effect is not easily affected by the deployment effect, and the damage detection effect is improved.

[0037] Further, in the embodiment, the vibration source 3 is arranged at a predicted risk position on the surface of the weak current cable slot 1, and the predicted risk position is a position where the probability of damage occurrence in the weak current cable slot 1 is greater than a preset value.

[0038] The weak current cable slot 1 has positions where damage is prone to occur according to the structural characteristics in the design and the position in the building after deployment. Optionally, before the weak current cable slot damage detection system is deployed, the probability of damage occurrence at each position of the weak current cable slot 1 is analyzed, a preset value is set as an index, and the position where the probability of damage occurrence is greater than the preset value is determined as the predicted risk position. For example, the probability of damage occurrence at a generally continuous position on the weak current cable slot 1 is the preset value, and the probability of damage occurrence at the cable slot joint position is greater than the preset value, so the position can be determined as the predicted risk position.

[0039] By arranging the vibration source 3 at the predicted risk position on the surface of the weak current cable slot 1, the positions where damage is prone to occur can be detected, the sensitivity of detection is improved, and the number of required vibration sources can be saved, so that the cost of damage detection is reduced.

[0040] Further, in the embodiment, the vibration source 3 is arranged on the outer surface of the weak current cable slot 1.

[0041] In the embodiment, the weak current cable slot 1 is a cable slot that has been packaged and is in use, and considering that disassembling the cable slot in use may affect the normal use of the line therein, the vibration source 3 in the embodiment is arranged on the outer surface of the weak current cable slot 1. When the vibration source 3 emits vibration, the vibration signal is transmitted from the outer surface of the weak current cable slot 1 to the inner surface of the weak current cable slot 1, so as to drive the optical fiber line 2 to vibrate.

[0042] By setting the vibration source 3 on the outer surface of the weak current cable duct 1, the weak current cable duct 1 does not need to be disassembled, the influence on the normal line in use is reduced, and the deployment on the outer surface can reduce the difficulty of deployment and improve the efficiency of deployment work.

[0043] Further, in the embodiment, the number of vibration sources 3 is multiple, and the signal analysis device 4 is further configured to determine multiple vibration characteristic parameters of different positions on the optical fiber line 2 according to the detection signal, and determine whether there is a vibration characteristic parameter representing damage of the weak current cable duct 1 in the multiple vibration characteristic parameters.

[0044] Optionally, since the vibration signal transmitted by a single vibration source 3 can only be transmitted for a limited distance on the surface of the weak current cable duct 1, in order to detect the weak current cable duct 1 as a whole or detect multiple different expected risk positions thereon, multiple vibration sources 3 need to be arranged, each vibration source 3 emits a vibration signal to detect whether the corresponding expected risk position is damaged. Further, the signal analysis device 4 demodulates to obtain multiple vibration characteristic parameters corresponding to the number of vibration sources 3, and determines whether there is a vibration characteristic parameter representing damage in the multiple vibration characteristic parameters, so as to detect damage of multiple different expected risk positions of the weak current cable duct 1.

[0045] By arranging multiple vibration sources 3 and analyzing multiple vibration characteristic parameters by the signal analysis device 4, damage detection of multiple different positions on the weak current cable duct 1 can be realized, and the safety of damage detection of the weak current cable duct 1 is improved.

[0046] Further, based on the above embodiment, another embodiment of the weak current cable duct damage detection system using existing redundant optical fibers is provided. In the embodiment, the signal analysis device 4 is further configured to input the vibration characteristic parameter into a neural network model, and determine whether the weak current cable duct 1 is damaged according to the result output by the neural network model.

[0047] In the embodiment, the signal analysis device 4 uses the neural network model to determine whether the obtained vibration characteristic parameter represents damage of the weak current cable duct 1.

[0048] Optionally, the neural network model is a binary classifier based on a random forest algorithm, which can determine whether the input vibration characteristic parameter corresponds to damage or no damage. Before deploying the weak current cable duct damage detection system, the neural network model has been trained using data samples related to the vibration characteristic parameter; and the model can be configured on a cloud platform or the signal analysis device 4, if the structure of the signal analysis device 4 needs to be simplified, the model can be configured on a server, the signal analysis device 4 uploads the vibration characteristic parameter to the server for judgment, and obtains the judgment result from the server.

[0049] In addition, based on the above embodiment, the number of vibration sources 3 can be multiple, corresponding to multiple vibration characteristic parameters, and the multiple vibration characteristic parameters are input into the neural network model, and the neural network model can be analyzed and judged, and when it is determined that any one of the vibration characteristic parameters represents that the weak current cable duct 1 is damaged, the result that the weak current cable duct 1 is damaged is output.

[0050] In other embodiments, the vibration characteristic parameters obtained after demodulation can not be used, and the detection signal is directly input into the neural network model, and whether the weak current cable duct 1 is damaged is judged according to the output result of the neural network model. At this time, the neural network model is a neural network model trained by using data samples related to the detection signal.

[0051] By using the neural network model to judge whether there is damage, the accuracy of the data analysis stage can be improved, and the detection effect of the weak current cable duct damage detection can be further improved.

[0052] Further, in the present embodiment, the signal analysis device 4 is further used to determine the damage position of the weak current cable duct 1 according to the vibration characteristic parameters when it is determined that the weak current cable duct 1 is damaged.

[0053] Optionally, when it is determined that the weak current cable duct 1 is damaged, the specific damage position is further determined according to the vibration characteristic parameters. By determining the damage position, the worker can quickly locate the position of the damage when facing a weak current cable duct with a relatively long length, thereby helping the worker to repair or maintain, and improving the efficiency of the weak current cable duct maintenance work.

[0054] Further, in the present embodiment, the signal analysis device 4 is further used to determine the mapping relationship between the position on the surface of the weak current cable duct 1 and the position on the optical fiber line 2, and the vibration characteristic parameters according to the position of each vibration source 3 and the corresponding vibration characteristic parameters when each vibration source 3 is turned on.

[0055] It should be noted that the data analysis of the vibration characteristic parameters can determine the corresponding optical fiber length parameter, and according to the parameter, the corresponding position on the optical fiber line 2 can be deduced, but because the optical fiber line 2 is arranged in the weak current cable duct 1, due to the influence of the deployment process and the layout of the line, the optical fiber length cannot be equal to the length of the weak current cable duct 1, and the weak current cable duct 1 cannot be marked with a scale of the corresponding optical fiber length parameter. Therefore, the correlation between the position on the optical fiber line 2 and the position on the surface of the weak current cable duct 1 needs to be determined.

[0056] Optionally, after the vibration source 3 and the signal analysis device 4 are deployed, the multiple vibration sources 3 deployed at different positions are turned on one by one, and the signal analysis device 4 determines the mapping relationship between the vibration characteristic parameters, the positions on the optical fiber line 2, and the positions on the weak current cable slot 1 according to the vibration characteristic parameters obtained when each vibration source 3 is turned on.

[0057] For example, the first vibration source is deployed at the first position on the weak current cable slot 1, when the first vibration source is turned on, the signal analysis device 4 obtains the first vibration characteristic parameter, analyzes the first vibration characteristic parameter, and determines that the corresponding position on the optical fiber line 2 is the second position, thereby determining that the first vibration characteristic parameter, the second position on the optical fiber line 2, and the first position on the weak current cable slot 1 have a corresponding mapping relationship.

[0058] In other embodiments, in addition to arranging the vibration source 3 at different positions along the axis of the weak current cable slot 1, more than one vibration source can also be arranged along the circumference at the same position along the axis, and a mapping relationship between the vibration characteristic parameters is also established, so as to further analyze the damage position in the circumferential direction at the same axial position, and further improve the damage detection effect.

[0059] By determining the mapping relationship between the vibration characteristic parameters, the positions on the optical fiber line 2, and the positions on the weak current cable slot 1, when the signal analysis device 4 analyzes the vibration characteristic parameters, a corresponding relationship with the positions on the weak current cable slot 1 can be formed, thereby supporting the determination of the weak current cable damage position according to the vibration characteristic parameters, and improving the damage detection effect.

[0060] Further, in the embodiment, the signal analysis device 4 is further configured to determine a target vibration parameter matched with a preset damage parameter from the multiple vibration characteristic parameters, and determine the damage position of the weak current cable slot 1 according to the target vibration parameter and the mapping relationship.

[0061] The preset damage parameter is a corresponding parameter state of the vibration characteristic parameter when there is damage, which is set by the staff. Optionally, when it is determined that the weak current cable slot 1 has damage, the signal analysis device 4 further compares whether each vibration characteristic parameter matches the preset damage parameter, the vibration characteristic parameter matched with the preset damage parameter is defined as the target vibration parameter, and the position on the weak current cable slot 1 corresponding to the target vibration parameter is determined according to the determined mapping relationship and the target vibration parameter, thereby determining the damage position represented by the target vibration parameter.

[0062] For example, continue to describe the above example of the first vibration source and the first position, when the first vibration characteristic parameter represents that there is damage in the subsequent detection, the mapping relationship can be used to determine that the first position on the weak current cable slot 1 has damage.

[0063] In other embodiments, a sub neural network model can also be retrained to further determine each vibration feature parameter when it is determined that the weak current cable tray 1 has damage, and output a determination result of whether each vibration feature parameter represents damage at its corresponding position.

[0064] By determining the mapping relationship, the damage position of the weak current cable tray 1 is determined according to the vibration feature parameter, which can help the staff to quickly locate the position where the damage occurs, so as to further investigate or maintain, improve the detection effect of the weak current cable tray damage detection, and improve the efficiency of the weak current cable tray maintenance work.

[0065] Further, based on the above embodiments, the weak current cable tray damage detection system using the existing redundant optical fiber is further provided in another embodiment of the application. Referring to Figure 2 In this embodiment, the weak current cable tray damage detection system using the existing redundant optical fiber further comprises:

[0066] The fixing member 5 is provided on the surface of the weak current cable tray 1 in a plurality along the axial direction of the weak current cable tray 1, the bottom end of the fixing member 5 is fixedly connected with the inner surface of the weak current cable tray 1, and the top end of the fixing member 5 is provided with a limiting groove for fixing the optical fiber line 2.

[0067] In this embodiment, the weak current cable tray 1 is a newly installed and unsealed cable tray, so when deploying the weak current cable tray damage detection system, components other than the above embodiments can be added, or other combinations can be used to improve the damage detection effect.

[0068] Optionally, a plurality of fixing members 5 are provided on the surface of the weak current cable tray 1 at a predetermined interval along the axial direction of the weak current cable tray 1, wherein the bottom end of the fixing member 5 is fixedly connected with the inner surface of the weak current cable tray 1, and the top end of the fixing member 5 is provided with a limiting groove for fixing the optical fiber line 2. When the optical fiber line 2 extends in the weak current cable tray 1 along the axial direction thereof, it passes through the limiting groove of each fixing member 5, so that the fixing member 5 fixes the optical fiber line 2 and comes into contact with the optical fiber line 2.

[0069] By providing the fixing member 5 to fix the optical fiber line 2 in the weak current cable tray 1, when the vibration source 3 emits a vibration signal, the vibration signal can be transmitted to the fixing member 5 through the surface of the weak current cable tray 1, and then the fixing member 5 drives the optical fiber line 2 to vibrate, so that the optical fiber line 2 is driven to vibrate without passing through the air, thereby improving the transmission effect of the vibration signal between the vibration source 3 and the optical fiber line 2, and improving the detection effect of the weak current cable tray damage.

[0070] Further, in this embodiment, the weak current cable tray damage detection system using the existing redundant optical fiber further comprises the optical fiber line 2, and the optical fiber line 2 is a single-mode optical fiber.

[0071] Since the weak current trunking 1 in the embodiment is a newly set and unpackaged trunking, the deployed weak current trunking damage detection system can further include a newly set single-mode optical fiber line. The single-mode optical fiber has smaller transmission loss and transmission dispersion than the multi-mode optical fiber, and can support a longer transmission distance, which is beneficial to long-distance optical fiber line wiring planning in high-rise buildings, improves the transmission effect of optical signals and detection signals thereon, and improves the detection effect of weak current trunking damage.

[0072] Further, in the embodiment, the vibration source 3 is arranged on the inner surface of the weak current trunking 1.

[0073] Since the weak current trunking 1 in the embodiment is a newly set and unpackaged trunking, the vibration source 3 can be arranged on the inner surface of the weak current trunking 1. By arranging the vibration source 3 on the inner surface of the weak current trunking 1, the vibration signal emitted by the vibration source 3 does not need to be transmitted to the inner surface through the outer surface, and the vibration source 3 can be packaged into the trunking when the weak current trunking 1 is packaged, preventing the vibration source 3 from being damaged due to external impact and improving the stability and detection effect of weak current trunking damage detection.

[0074] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or systems that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles, or systems. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article, or system that includes the element.

[0075] The above-mentioned embodiment numbers of the application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0076] The above is only the preferred embodiment of the application, and does not limit the patent scope of the application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the application, is also included in the patent protection scope of the application.

Claims

1. A weak electrical conduit damage detection system utilizing existing redundant fiber, characterized by, The weak current slot damage detection system using existing redundant optical fibers comprises: a vibration source arranged on the surface of the weak current slot, the vibration source being used to drive the existing and redundant optical fiber line in the weak current slot to vibrate, wherein the optical fiber line has an optical signal, when the vibration signal of the vibration source is transmitted to the optical fiber line, the optical signal is modulated with the vibration signal to form a detection signal, and when the vibration signal is transmitted through the surface of the weak current slot, the damage condition of the weak current slot is different, the vibration signal is different, and the detection signal formed is also different; a signal analysis device connected with the optical fiber line, the signal analysis device being used to collect the detection signal of the optical fiber line, determine the vibration characteristic parameters of different positions on the optical fiber line according to the detection signal, and determine whether the weak current slot has damage according to the vibration characteristic parameters, the signal analysis device being connected with the optical fiber line and arranged at an end position of the optical fiber line or the weak current slot.

2. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 1, wherein, The weak current slot damage detection system using existing redundant optical fibers further comprises: a plurality of fixing members arranged on the surface of the weak current slot along the axial direction of the weak current slot, the bottom end of the fixing member being fixedly connected with the inner surface of the weak current slot, and the top end of the fixing member being provided with a limiting groove for fixing the optical fiber line.

3. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 1, wherein, The vibration source is arranged at a predicted risk position on the surface of the weak current slot, the predicted risk position being a position where the probability of damage risk in the weak current slot is greater than a preset value.

4. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 1, wherein, The vibration source is arranged on the inner surface or the outer surface of the weak current slot.

5. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 1, wherein, The number of vibration sources is plural, and the signal analysis device is further used to determine a plurality of vibration characteristic parameters of the same number as the number of vibration sources at different positions on the optical fiber line according to the detection signal, and determine whether there is a vibration characteristic parameter representing damage of the weak current slot in the plurality of vibration characteristic parameters.

6. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of any one of claims 1 to 5, wherein, The signal analysis device is further used to input the vibration characteristic parameters into a neural network model, and determine whether the weak current slot has damage according to the output result of the neural network model.

7. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of any one of claims 1 to 5, wherein, The signal analysis device is further used to determine the damage position of the weak current slot according to the vibration characteristic parameters when the weak current slot has damage.

8. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 7, wherein, The signal analysis device is further used to determine the mapping relationship between the positions on the surface of the weak current slot and the positions on the optical fiber line, and between the vibration characteristic parameters, according to the position of each vibration source and the corresponding vibration characteristic parameter when each vibration source is turned on.

9. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of claim 8, wherein, The signal analysis device is further used to determine a target vibration parameter matching a preset damage parameter in the plurality of vibration characteristic parameters, and determine the damage position of the weak current slot according to the target vibration parameter and the mapping relationship.

10. The weak electrical raceway damage detection system utilizing existing redundant optical fiber of any one of claims 1 to 5, wherein, The weak current slot damage detection system using existing redundant optical fibers further comprises the optical fiber line, and the optical fiber line is a single-mode optical fiber.

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