Anti-theft detection device for backflow cable

Abstract

The utility model discloses a backflow cable anti-theft detection device, which is applied to a backflow cable and comprises a vibration sensing optical cable device arranged on the backflow cable along the backflow cable and used for detecting a first alarm signal; the plurality of point location type vibration sensing devices are distributed on the backflow cable along the backflow cable, and each point location type vibration sensing device is used for detecting a second alarm signal of the corresponding detection point; the overall distribution length of the point location type vibration sensing devices is smaller than or equal to the length of the vibration sensing optical cable device. And the control device is electrically connected with the vibration sensing optical cable device and the plurality of point location type vibration sensing devices, and the control device is used for transmitting the first alarm signal and the plurality of second alarm signals to a monitoring platform so as to realize anti-theft monitoring of the backflow cable. The anti-theft detection device can improve the accuracy of anti-theft detection of the backflow cable.

Description

TECHNICAL FIELD

[0001] The utility model relates to power cable system technical field, especially relates to a backflow cable theftproof detection device. BACKGROUND

[0002] In recent years, the backflow cable theft of long-distance power cable system is common, and various measures including video monitoring are difficult to provide reliable theftproof early warning scheme under the premise of acceptable cost. The existing theftproof detection mode using vibration alarm and broken line alarm has single detection point, cannot accurately locate abnormal point, has the possibility of equipment failure and low detection accuracy. CONTENT OF UTILITY MODEL

[0003] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, the utility model provides a backflow cable theftproof detection device, which can improve the accuracy of backflow cable theftproof detection.

[0004] The backflow cable theftproof detection device according to the utility model embodiment is applied to a backflow cable, and comprises:

[0005] A vibration sensing optical cable device is arranged on the backflow cable along the backflow cable, and the vibration sensing optical cable device is used for detecting a first alarm signal.

[0006] A plurality of point type vibration sensing devices are distributed on the backflow cable along the backflow cable, and each point type vibration sensing device is used for detecting a second alarm signal of a corresponding detection point. The overall distribution length of the plurality of point type vibration sensing devices is less than or equal to the length of the vibration sensing optical cable device.

[0007] A control device is electrically connected with the vibration sensing optical cable device and the plurality of point type vibration sensing devices respectively, and the control device is used for transmitting the first alarm signal and the plurality of second alarm signals to a monitoring platform to realize theftproof monitoring of the backflow cable.

[0008] The backflow cable theftproof detection device according to the utility model embodiment has at least the following beneficial effects:

[0009] The monitoring line of the vibration sensing optical cable device is long, can realize partition management, has strong anti-interference property and can reduce false alarms. The detection points of the plurality of point type vibration sensing devices are denser and more accurate, can quickly respond to and locate abnormal conditions. The backflow cable is simultaneously theftproof monitored by the vibration sensing optical cable device and the plurality of point type vibration sensing devices, the abnormal point is determined in the case that the vibration sensing optical cable device and at least one point type vibration sensing device alarm at the same time, the abnormal conditions of the long monitoring line can be quickly responded to and located, false alarms can be reduced, and the accuracy of backflow cable theftproof detection is improved.

[0010] According to some embodiments of the utility model, the second alarm signal includes second vibration signal, second broken line signal and temperature detection signal, each point type vibration induction device includes with control device electric connection:

[0011] Vibration induction module, for detecting the second vibration signal and the second broken line signal of corresponding detection point;

[0012] Temperature detection module, for detecting the temperature detection signal of corresponding detection point, the temperature detection module is fixed with the vibration induction module on the reflow cable in the form of embracing.

[0013] According to some embodiments of the utility model, still be equipped with CT induction power module between the vibration induction module and the temperature detection module, the CT induction power module is used for the vibration induction module and the temperature detection module power supply.

[0014] According to some embodiments of the utility model, the CT induction power module includes:

[0015] First CT induction power piece, is connected between one side of vibration induction module and one side of temperature detection module;

[0016] Second CT induction power piece, is connected between the other side of vibration induction module and the other side of temperature detection module;The first CT induction power piece and the second CT induction power piece are commonly used for the vibration induction module and the temperature detection module power supply;

[0017] Fastening structure, with first CT induction power piece and second CT induction power piece connection, the fastening structure is used for the first CT induction power piece, second CT induction power piece, vibration induction module and temperature detection module are fixed on the reflow cable.

[0018] According to some embodiments of the utility model, a plurality of vibration induction module is connected with control device in series through a cable, and each vibration induction module is connected with the cable through a plug structure.

[0019] According to some embodiments of the utility model, each vibration induction module includes:

[0020] Sensor housing;

[0021] Vibration sensor, is located in sensor housing, and the vibration sensor is used for detecting the second vibration signal of corresponding detection point;

[0022] A broken line alarm is arranged in the sensor shell, and the broken line alarm is used for detecting the second broken line signal of the corresponding detection point.

[0023] According to some embodiments of the present application, the vibration sensor and the broken line alarm are filled with a sealing buffer layer between the sensor shell.

[0024] According to some embodiments of the present application, a plurality of point type vibration sensing devices are distributed at equal intervals.

[0025] According to some embodiments of the present application, the vibration sensing optical cable device comprises:

[0026] A vibration sensing optical fiber is arranged on the reflow cable, and a first end of the vibration sensing optical fiber is connected with the control device, and the vibration sensing optical fiber is used for detecting the first alarm signal.

[0027] A terminal box is connected with a last end of the vibration sensing optical fiber.

[0028] According to some embodiments of the present application, the control device comprises:

[0029] A control box;

[0030] A data processing module is arranged in the control box, and the data processing module is electrically connected with the vibration sensing optical cable device and a plurality of point type vibration sensing devices respectively, and the data processing module is used for transmitting the first alarm signal and a plurality of second alarm signals to the monitoring platform, so as to realize the anti-theft monitoring of the reflow cable.

[0031] A power supply module is arranged in the control box, and the power supply module is used for supplying power to the data processing module.

[0032] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] The present application will be further described below in combination with the drawings and embodiments, wherein:

[0034] Figure 1 It is a whole structure diagram of the reflow cable anti-theft detection device of an embodiment of the present application;

[0035] Figure 2 It is a split structure diagram of the reflow cable anti-theft detection device of an embodiment of the present application;

[0036] Figure 3 It is a structure diagram of the point type vibration sensing device of an embodiment of the present application;

[0037] Figure 4 The arrangement drawing of the backflow cable anti-theft detection device of an embodiment of the present application.

[0038] Reference signs:

[0039] The backflow cable 100;

[0040] The point type vibration sensing device 200, the cable 201, the navigation plug structure 202, the vibration sensing module 210, the temperature detection module 220, the first CT induction power taking part 231, the second CT induction power taking part 232, the fastening structure 233;

[0041] The vibration sensing optical fiber 310, the terminal box 320;

[0042] The control device 400, the access channel 410, the power supply interface 420, the antenna interface 430. DETAILED DESCRIPTION

[0043] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0044] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the description of the present application, the plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0046] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0047] The embodiments of the present application will be described below. Figures 1 to 4 The backflow cable anti-theft detection device of the embodiments of the present application will be described clearly and completely, obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0048] Reference Figures 1 to 4 , Figure 1 It is the overall structure diagram of the backflow cable anti-theft detection device of an embodiment of the utility model, Figure 2 It is the split structure diagram of the backflow cable anti-theft detection device of an embodiment of the utility model, Figure 3 It is the structure diagram of point type vibration sensing device 200 of an embodiment of the utility model, Figure 4 It is the layout diagram of the backflow cable anti-theft detection device of an embodiment of the utility model.

[0049] According to the backflow cable anti-theft detection device of the utility model embodiment, it is applied to backflow cable 100, and the backflow cable anti-theft detection device includes vibration sensing optical cable device, multiple point type vibration sensing devices 200 and control device 400.

[0050] Vibration sensing optical cable device is arranged on backflow cable 100 along backflow cable 100, and vibration sensing optical cable device is used to detect first alarm signal;

[0051] Multiple point type vibration sensing devices 200 are distributedly arranged on backflow cable 100 along backflow cable 100, and each point type vibration sensing device 200 is used to detect second alarm signal of corresponding detection point; The overall distribution length of multiple point type vibration sensing devices 200 is less than or equal to the length of vibration sensing optical cable device;

[0052] Control device 400 is electrically connected with vibration sensing optical cable device and multiple point type vibration sensing devices 200 respectively, and control device 400 is used to transmit first alarm signal and multiple second alarm signals to monitoring platform, to realize anti-theft monitoring of backflow cable 100.

[0053] Through vibration sensing optical cable device and multiple point type vibration sensing devices 200, whether backflow cable 100 has behaviors such as touching, dragging and cutting can be perceived, alarm signal includes vibration signal and broken line signal, in combination with two alarm modes of vibration alarm and broken line alarm, staff can be helped to more comprehensively understand and judge backflow cable 100 state, to achieve the effect of eliminating false alarm and reducing operation and maintenance cost.

[0054] Multiple point type vibration sensing devices 200 are distributedly arranged on backflow cable 100 along backflow cable 100, one point type vibration sensing device 200 is arranged every interval, monitoring point is more dense and accurate, and vibration occurrence position can be more sensitively and accurately judged and positioned, operation and maintenance response efficiency is improved, and property loss is reduced.

[0055] The monitoring line of vibration sensing optical cable device is long, can realize partition management, has strong anti-interference, and can reduce false alarm.

[0056] If only multiple point type vibration sensing devices 200 are arranged to monitor, there will inevitably be individual point type vibration sensing device 200 failure. Through the vibration sensing optical cable device and multiple point type vibration sensing devices 200 simultaneously monitor the backflow cable 100, in the case of vibration sensing optical cable device and at least one point type vibration sensing device 200 alarm at the same time to determine the abnormal point, which can quickly respond to and locate the abnormal situation of long monitoring line, but also can reduce false positives, improve the accuracy of backflow cable 100 anti-theft detection.

[0057] In some embodiments, the vibration sensing optical cable device and the multiple point type vibration sensing devices 200 can also be selected according to the actual situation and demand.

[0058] According to the backflow cable anti-theft detection device of the utility model embodiment, the monitoring line of vibration sensing optical cable device is long, can realize partition management, has strong anti-interference, can reduce false positives; the detection point of multiple point type vibration sensing devices 200 is more dense and accurate, can quickly respond to and locate the abnormal situation; through the vibration sensing optical cable device and multiple point type vibration sensing devices 200 simultaneously monitor the backflow cable 100, in the case of vibration sensing optical cable device and at least one point type vibration sensing device 200 alarm at the same time to determine the abnormal point, which can quickly respond to and locate the abnormal situation of long monitoring line, but also can reduce false positives, improve the accuracy of backflow cable 100 anti-theft detection.

[0059] In some embodiments of the utility model, reference Figures 1 to 3 The second alarm signal includes a second vibration signal, a second broken line signal and a temperature detection signal, and each point type vibration sensing device 200 includes a vibration sensing module 210 and a temperature detection module 220 electrically connected with the control device 400.

[0060] The vibration sensing module 210 is used for detecting the second vibration signal and the second broken line signal of the corresponding detection point;

[0061] The temperature detection module 220 is used for detecting the temperature detection signal of the corresponding detection point, and the temperature detection module 220 and the vibration sensing module 210 are fixed on the backflow cable 100 in a ring type.

[0062] Combined with the two alarm modes of vibration alarm and broken line alarm, it can help the staff to more comprehensively understand and judge the state of the backflow cable 100, achieve the effect of eliminating false positives and reducing operation and maintenance cost.

[0063] It can be understood that when the backflow cable 100 is touched, dragged, cut, etc., the surface temperature of the backflow cable 100 can change due to the friction, and the abnormal state of the backflow cable 100 can also be reflected by detecting the surface temperature of the backflow cable 100, so that the state of the backflow cable 100 can be more accurately monitored.

[0064] The temperature detection module 220 and the vibration sensing module 210 are fixed on the backflow cable 100 in a ring type, without the need for additional fixation, which can reduce the overall volume and cost. In some embodiments, the temperature detection module 220 and the vibration sensing module 210 can be connected in a buckle connection mode, a lock connection mode, or other connection modes, which are not limited herein.

[0065] In some embodiments of the present application, Figures 1 to 4 A plurality of vibration sensing modules 210 are connected in series with the control device 400 through a cable 201, and each vibration sensing module 210 is connected with the cable 201 through a jack structure 202. In the case of needing to expand more vibration sensing modules 210 or monitor longer lines, more and longer vibration sensing modules 210 can be connected through the jack structure 202, and the number of vibration sensing modules 210 and the monitoring length can be changed according to different environments and monitoring requirements, so as to meet the actual monitoring requirements. Or when a vibration sensing module 210 is abnormal, it can be directly removed and replaced with a new normal vibration sensing module 210, which is convenient and flexible to use.

[0066] It should be noted that the specific structure and working principle of the jack structure 202 are known to those skilled in the art, and will not be described herein.

[0067] In some embodiments of the present application, each vibration sensing module 210 includes a sensor housing, a vibration sensor, and a broken line alarm. The vibration sensor is arranged in the sensor housing and is used to detect the second vibration signal of the corresponding detection point; the broken line alarm is arranged in the sensor housing and is used to detect the second broken line signal of the corresponding detection point.

[0068] Combining the vibration alarm and the broken line alarm, the staff can more comprehensively understand and judge the state of the backflow cable 100, so as to achieve the effect of eliminating false alarms and reducing operation and maintenance costs.

[0069] In some embodiments of the present application, a sealing buffer layer is filled between the vibration sensor and the broken line alarm and the sensor housing. The sealing buffer layer has good sealing and impact attenuation performance, and is dustproof and waterproof. When the vibration sensing module 210 is crushed, stepped on or subjected to other unexpected impacts, the deformation can be reduced to protect the vibration sensing module 210.

[0070] It should be noted that the material of the sealing buffer layer can be selected according to actual needs, and is not specifically limited here.

[0071] In some embodiments of the utility model, referring to Figure 1 、 Figure 2 and Figure 4 , the multiple point vibration sensing devices 200 are distributed at equal intervals. The equal interval distribution of the multiple point vibration sensing devices 200 can make the detection points more orderly and dense, and can more sensitively and accurately determine the vibration occurrence position, improve the operation and maintenance response efficiency, and reduce property loss.

[0072] In some embodiments of the utility model, referring to Figure 1 and Figure 3 , a CT induction power taking module is further arranged between the vibration sensing module 210 and the temperature detection module 220, and the CT induction power taking module is used to supply power to the vibration sensing module 210 and the temperature detection module 220. The vibration sensing module 210 and the temperature detection module 220 take power through the CT induction power taking module, which can avoid insufficient power supply voltage drop when the wire length is too long or the vibration sensing module 210 and the temperature detection module 220 are connected too much.

[0073] The temperature detection module 220 includes a power conversion circuit, a temperature acquisition circuit, a signal processing circuit and a 485 conversion circuit. The power conversion circuit is responsible for converting the alternating current output by the CT induction power taking module into 3.3V direct current, and then supplying power to the temperature detection module 220. The temperature acquisition circuit is responsible for real-time acquisition of the surface temperature of the backflow cable 100, and then amplifies, filters and processes the signal through the signal processing circuit, and then outputs the 485 signal through the 485 conversion circuit, and uploads the temperature detection signal of the backflow cable 100 to the control device 400 through the cable 201.

[0074] It should be noted that the vibration sensing module 210 and the temperature detection module 220 can also take power through a wired power supply, which cannot be considered as a limitation of the utility model.

[0075] In some embodiments of the utility model, referring to Figure 3 , the CT induction power taking module includes a first CT induction power taking piece 231, a second CT induction power taking piece 232 and a fastening structure 233.

[0076] The first CT induction power taking piece 231 is connected between one side of the vibration sensing module 210 and one side of the temperature detection module 220.

[0077] A second CT induction power taking component 232 is connected between the other side of the vibration induction module 210 and the other side of the temperature detection module 220; the first CT induction power taking component 231 and the second CT induction power taking component 232 are used for powering the vibration induction module 210 and the temperature detection module 220 together.

[0078] A fastening structure 233 is connected with the first CT induction power taking component 231 and the second CT induction power taking component 232, and the fastening structure 233 is used for fixing the first CT induction power taking component 231, the second CT induction power taking component 232, the vibration induction module 210 and the temperature detection module 220 on the return flow cable 100.

[0079] The first CT induction power taking component 231 and the second CT induction power taking component 232 are flexible structures, and the inside is a metal induction sheet, and the outside is an insulating rubber sheath, which can be fixed on the surface of the return flow cable 100 through the fastening structure 233.

[0080] It should be noted that the fastening structure 233 can only fix the first CT induction power taking component 231 and the second CT induction power taking component 232, so that the first CT induction power taking component 231, the second CT induction power taking component 232, the vibration induction module 210 and the temperature detection module 220 can be fixed on the return flow cable 100, and the specific structure is not limited here.

[0081] In addition, the CT induction power taking principle is prior art known to those skilled in the art, which will not be described here.

[0082] In some embodiments of the utility model, reference Figure 1 , Figure 2 and Figure 4 , the vibration induction optical cable device comprises a vibration induction optical fiber 310 and a terminal box 320.

[0083] The vibration induction optical fiber 310 is arranged on the return flow cable 100, and the first end of the vibration induction optical fiber 310 is connected with the control device 400; the vibration induction optical fiber 310 is used for detecting the first alarm signal.

[0084] The terminal box 320 is connected with the tail end of the vibration induction optical fiber 310.

[0085] The vibration induction optical fiber 310 is a passive structure and does not need external power supply; the vibration induction optical fiber 310 is laid along the surface of the return flow cable 100, one terminal box 320 is connected at the tail of one vibration induction optical fiber 310, when the return flow cable 100 is dragged, the vibration induction optical fiber 310 reports the first alarm signal to the control device 400.

[0086] The vibration monitoring and broken line alarm monitoring are performed through the optical fiber, the monitoring line is longer, the zoning management can be realized, the anti-interference performance is high, and the false alarm can be reduced.

[0087] In some embodiments of the utility model, the control device 400 includes a control box, a data processing module and a power supply module. The data processing module is arranged in the control box, and the data processing module is electrically connected with the vibration sensing optical cable device and the plurality of point type vibration sensing devices 200 respectively. The data processing module is used for transmitting the first alarm signal and the plurality of second alarm signals to a monitoring platform to realize anti-theft monitoring of the backflow cable 100. The power supply module is arranged in the control box, and the power supply module is used for supplying power to the data processing module.

[0088] The data processing module is responsible for receiving the alarm signals of the vibration sensing optical cable device and the plurality of point type vibration sensing devices 200, and analyzing, processing and converting the signals, and then outputting through wireless or Ethernet mode and accessing the power system center. The power supply module is connected with the AC 220V power interface 420, takes power from the outside through the AC 220V power interface 420, and is responsible for converting AC 220V into DC 12V to supply power to the data processing module.

[0089] The control box also has an antenna interface 430 and a plurality of access channels 410 outside. The antenna interface 430 is used for data transmission of the first alarm signal and the plurality of second alarm signals. It should be noted that according to the actual application, the antenna interface 430 can be replaced with an Ethernet interface. The plurality of access channels 410 are used for accessing the vibration sensing optical cable device and the plurality of point type vibration sensing devices 200, and can monitor a plurality of lines at the same time, which can not only reduce the system operation and maintenance cost, but also be suitable for more complex field environments, and has good applicability.

[0090] The control box adopts IP68 waterproof design.

[0091] As shown in Figure 4 In some embodiments, the backflow cable 100 line of two defense zones can be monitored at the same time. The data processing module includes a signal analysis processing module and a data transmission conversion module. When the line is abnormal, the signal analysis processing module outputs the received alarm information to the data transmission conversion module. The data transmission conversion module integrates and packages the alarm information, alarm channel, alarm sensor ID, alarm position and other information into a standard protocol, and then uploads to the corresponding information center (i.e. the monitoring platform) through the antenna interface 430 or the Ethernet interface.

[0092] In some embodiments, the data processing module further includes a protocol conversion module, which supports Modbus, I1 protocol, custom protocol and other protocol conversion, is suitable for a wider range, and is convenient for device access to various power grid special platforms or private platforms.

[0093] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. A theft detection device for a reflow cable, applied to the reflow cable, characterized in that, The backflow cable anti-theft detection device comprises: a vibration sensing optical cable device arranged on the backflow cable along the backflow cable, the vibration sensing optical cable device being configured to detect a first alarm signal; a plurality of point-type vibration sensing devices distributed on the backflow cable along the backflow cable, each of the point-type vibration sensing devices being configured to detect a second alarm signal of a corresponding detection point, and the overall distributed length of the plurality of point-type vibration sensing devices being less than or equal to the length of the vibration sensing optical cable device; a control device electrically connected to the vibration sensing optical cable device and the plurality of point-type vibration sensing devices, the control device being configured to transmit the first alarm signal and the plurality of second alarm signals to a monitoring platform to realize anti-theft monitoring of the backflow cable.

2. The theft detection device of claim 1, wherein, The second alarm signal comprises a second vibration signal, a second broken line signal and a temperature detection signal, each of the point-type vibration sensing devices comprises: a vibration sensing module electrically connected to the control device, the vibration sensing module being configured to detect the second vibration signal and the second broken line signal of the corresponding detection point; a temperature detection module configured to detect the temperature detection signal of the corresponding detection point, the temperature detection module being fixed on the backflow cable in a ring-encircling manner with the vibration sensing module.

3. The theft detection device of claim 2, wherein, A CT induction power module is further arranged between the vibration sensing module and the temperature detection module, the CT induction power module being configured to supply power to the vibration sensing module and the temperature detection module.

4. The theft detection device of claim 3, wherein, The CT induction power module comprises: a first CT induction power component connected between one side of the vibration sensing module and one side of the temperature detection module; a second CT induction power component connected between the other side of the vibration sensing module and the other side of the temperature detection module; the first CT induction power component and the second CT induction power component being collectively configured to supply power to the vibration sensing module and the temperature detection module; a fastening structure connected to the first CT induction power component and the second CT induction power component, the fastening structure being configured to fix the first CT induction power component, the second CT induction power component, the vibration sensing module and the temperature detection module on the backflow cable.

5. The theft detection device of claim 2, wherein, The plurality of vibration sensing modules are connected in series with the control device through a cable, and each of the vibration sensing modules is connected to the cable through a plug structure.

6. The theft detection device of any one of claims 2 to 5, wherein, Each of the vibration sensing modules comprises: a sensor housing; a vibration sensor arranged in the sensor housing, the vibration sensor being configured to detect the second vibration signal of the corresponding detection point; a broken line alarm arranged in the sensor housing, the broken line alarm being configured to detect the second broken line signal of the corresponding detection point.

7. The theft detection device of claim 6, wherein the theft detection device is configured to detect the theft of the reflow cable by detecting a change in the electrical characteristic of the reflow cable. A sealing buffer layer is filled between the vibration sensor, the broken line alarm and the sensor housing.

8. The theft detection device of claim 1, wherein, The plurality of point-type vibration sensing devices are distributed at equal intervals.

9. The theft detection device of claim 1, wherein, The vibration sensing optical cable device comprises: a vibration sensing optical fiber arranged on the backflow cable, a first end of the vibration sensing optical fiber being connected to the control device, the vibration sensing optical fiber being configured to detect the first alarm signal; a terminal box connected to a last end of the vibration sensing optical fiber.

10. The theft detection device of claim 1, wherein, The control device comprises: a control box; a data processing module arranged in the control box, the data processing module being electrically connected with the vibration sensing optical cable device and the plurality of point-type vibration sensing devices respectively, and the data processing module being configured to transmit the first alarm signal and the plurality of second alarm signals to the monitoring platform to realize anti-theft monitoring of the return cable; a power supply module arranged in the control box, the power supply module being configured to supply power to the data processing module.

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