Underground cable vibration deformation monitoring and fault positioning device and method

Abstract

The invention discloses an underground cable vibration deformation monitoring and fault positioning device and method, in the embodiment, the device is fixed on an outer sheath of an underground cable directly buried, a cable trench, a cable tunnel and the like through a fixing module, and the cable outer sheath is used as a platform for fixed installation; the monitoring module in the device can be tightly attached to the surface of the outer sheath of the cable to monitor vibration or deformation generated when the cable is impacted by external force. The data processing module can read information of the monitoring module in real time, and if abnormal information is found, the signal and an equipment number are sent to a rear end through the communication module to be recognized, processed and calculated, so that the functions of abnormal external force impact recognition and fault positioning are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground cable monitoring, and in particular to a device and method for underground cable vibration deformation monitoring and fault locating. Background Art

[0002] Existing underground cable monitoring technologies include fiber optic sensing, acoustic wave sensing, and image capture.

[0003] Although fiber optic sensing technology has the advantages of high sensitivity and high resolution, it requires laying fiber optic sensors and cables over long distances and ensuring good contact between the sensors and cables. However, in actual projects, due to the complex underground environment and limited construction conditions, such long-distance laying is often difficult to achieve, which affects the reliability of the monitoring system. In addition, once the cable is damaged or fails, the fiber optic sensor will also be affected or damaged, which in turn affects the normal operation of the monitoring system.

[0004] Acoustic wave sensing technology usually uses sound signals transmitted by cables for monitoring and has certain application potential. However, due to various noise interferences in the underground environment, such as vehicle driving and construction work, the acoustic wave sensor is easily interfered by the outside world, which affects the accuracy and reliability of the monitoring results. At the same time, the acoustic wave sensing technology has limited ability to identify damage or faults of underground cables, and it is often difficult to accurately locate the fault point.

[0005] For the visual monitoring solution of cables, monitoring equipment is deployed at set intervals and image processing technology is used to detect the distance of hidden danger objects, and early warning is issued accordingly. Although this method has certain practicality in theory, it is easily affected by ambient light in actual applications, and there may be monitoring blind spots, and the monitoring accuracy is not high. Summary of the invention

[0006] The present invention provides an underground cable vibration deformation monitoring and fault locating device and method, so as to solve the problems that the existing underground cable monitoring has large limitations and low monitoring accuracy.

[0007] In order to solve the above technical problems, the present invention provides an underground cable vibration deformation monitoring and fault location device, including: a monitoring module, a data processing module, a communication module and a fixing module; the fixing module is connected to the monitoring module, the data processing module and the communication module respectively; the monitoring module is connected to the data processing module, and the data processing module is connected to the communication module;

[0008] The monitoring module is used to monitor the vibration signal and deformation of the underground cable; the data processing module is used to calculate whether the vibration signal and deformation meet the preset threshold; and the communication module is used to exchange data with the outside world.

[0009] The present invention fixes the device to the outer sheath of underground cables such as direct burial, cable trenches, and cable tunnels through a fixing module, and uses the outer sheath of the cable as a platform for fixed installation. The monitoring module inside the device can fit tightly to the surface of the outer sheath of the cable to monitor the vibration or deformation of the cable caused by external force impact. The data processing module can read the information of the monitoring module in real time. If abnormal information is found, the signal and the device number are sent to the back-end for identification processing and calculation through the communication module to achieve the function of identifying abnormal external force impact and fault location.

[0010] Furthermore, the fixing module includes a detachable cavity bracket, a detachable shell, an upper base bracket, a circuit fixing plate, a sensor fixing bracket and a cable fixing piece;

[0011] The detachable cavity bracket is arranged inside the detachable shell; the cable fixing piece is detachably connected to the detachable cavity.

[0012] The circuit fixing plate is arranged on the detachable cavity bracket, and the circuit fixing plate is connected to the detachable housing through an upper base plate bracket;

[0013] One end of the sensor fixing bracket is connected to the circuit fixing board, and the other end of the sensor fixing bracket is connected to the monitoring module;

[0014] The circuit fixing plate and the sensor fixing bracket are provided with power supply channels inside.

[0015] Furthermore, the cable fixing piece is a flexible fiber binding tape.

[0016] Further, the monitoring module includes a strain vibration sensor;

[0017] Further, the data processing device includes a central processing unit;

[0018] The central processing unit includes a battery holder, and the central processing unit is nested inside the circuit fixing board;

[0019] The central processing unit is connected to the monitoring module via the sensor fixing bracket.

[0020] Furthermore, the communication module is fixedly arranged on the upper surface of the detachable shell.

[0021] In a second aspect, the present invention also provides a control method for an underground cable vibration deformation monitoring and fault location device, characterized in that it is applied to the underground cable vibration deformation monitoring and fault location device

[0022] The monitoring module collects vibration signals and deformation amounts of underground cables, and transmits the vibration signals and deformation amounts to the data processing module;

[0023] Extracting features of the vibration signal according to the data processing module, and judging whether there is a characteristic abnormality in the underground cable according to the extracted features;

[0024] When there is a characteristic abnormality, the device information and characteristic abnormality data are uploaded through the communication module.

[0025] Furthermore, the feature extraction of the vibration signal and judging whether the underground cable has feature anomalies according to the extracted features are specifically as follows:

[0026] Extracting features from the vibration signal to obtain cable vibration features; and calculating feature differences in deformation amounts of the cable vibration features;

[0027] It is determined whether the vibration characteristics and deformation amount of the cable are abnormal according to the preset threshold and the characteristic difference.

[0028] Furthermore, the feature extraction of the vibration signal is performed to obtain the cable vibration feature; and the feature difference of the deformation amount of the cable vibration feature is calculated, specifically:

[0029] Extracting characteristic values ​​of the vibration signal, wherein the characteristic values ​​include peak value, mean value, standard deviation and spectrum;

[0030] The characteristic difference between the vibration signal and the deformation amount is calculated according to the preset reference signal characteristic value and the reference expansion amount.

[0031] In a third aspect, the present invention further provides a method for monitoring vibration deformation and locating faults of underground cables, comprising:

[0032] Calculating the monitoring points of the underground cables according to the preset interval distances, and setting an underground cable vibration deformation monitoring and fault locating device as claimed in any one of claims 1 to 6 at each underground cable monitoring point;

[0033] Acquire device information and characteristic abnormal data of abnormal monitoring points transmitted by each device, and acquire location information of the monitoring points according to the device information;

[0034] The location information of each monitoring point and the corresponding characteristic abnormal data are input into the energy fluctuation attenuation model to obtain the cable fault location, and the cable fault section is calculated according to the cable fault location. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a module of an underground cable vibration deformation monitoring and fault location device provided by an embodiment of the present invention;

[0036] Figure 2 Another module schematic diagram of an underground cable vibration deformation monitoring and fault location device provided by an embodiment of the present invention;

[0037] Figure 3 A schematic structural diagram of an underground cable vibration deformation monitoring and fault location device provided by an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the installation of an underground cable vibration deformation monitoring and fault location device provided by an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of cable abnormality monitoring provided by an embodiment of the present invention;

[0040] The reference numerals of the drawings in the specification are as follows:

[0041] 1. Monitoring module; 2. Data processing module; 3. Communication module; 4. Removable shell; 5. Removable cavity bracket; 6. Upper base bracket; 7. Power supply channel; 8. Circuit fixing plate; 9. Sensor fixing bracket; 10. Cable fixing. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] The terms "first" and "second" and the like in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] Please refer to Figure 1 , Figure 1A module schematic diagram of an underground cable vibration deformation monitoring and fault locating device provided in an embodiment of the present invention.

[0046] In this embodiment, the underground cable vibration deformation monitoring and fault location device comprises: a monitoring module 1, a data processing module 2, a communication module 3 and a fixing module; the fixing module is connected to the monitoring module 1, the data processing module 2 and the communication module 3 respectively; the monitoring module 1 is connected to the data processing module 2, and the data processing module 2 is connected to the communication module 3;

[0047] The monitoring module 1 is used to monitor the vibration signal and deformation of the underground cable; the data processing module 2 is used to calculate whether the vibration signal and deformation meet the preset threshold; and the communication module 3 is used to exchange data with the outside world.

[0048] In this embodiment, the vibration signal and deformation of the underground cable are collected through the monitoring module 1, and the vibration signal and deformation are transmitted to the data processing module 2; the vibration signal is feature extracted according to the data processing module 2, and it is determined whether the underground cable has feature abnormalities based on the extracted features; and the abnormal conditions of the cable are uploaded through the communication module 3, so as to monitor the vibration deformation of the underground cable.

[0049] Please refer to Figure 2 , Figure 2 Another module schematic diagram of an underground cable vibration deformation monitoring and fault locating device provided by an embodiment of the present invention.

[0050] In this embodiment, the monitoring module 1 includes a vibration sensor and a full-bridge strain gauge, which are respectively connected to the analog front-end circuit, and the collected vibration signal and deformation are converted into digital form according to the analog-to-digital conversion circuit, and transmitted to the central processing unit.

[0051] In this embodiment, the communication module 3 includes a ZigBee communication module 3 , the ZigBee communication module 3 is connected to the central processing module, and the ZigBee communication module 3 is connected to an external data terminal through wireless communication.

[0052] In this embodiment, a data storage circuit and a power supply module are also included. The data storage circuit is connected to the central processing unit, and the power supply module is connected to the central processing unit, and the communication module 3 and the monitoring module 1 are powered by the central processing unit.

[0053] Please refer to Figure 3 , Figure 3 A schematic structural diagram of an underground cable vibration deformation monitoring and fault locating device provided in an embodiment of the present invention.

[0054] In this embodiment, the fixing module includes a detachable cavity bracket 5, a detachable shell 4, an upper base bracket 6, a circuit fixing plate 8, a sensor fixing bracket 9 and a cable fixing member 10;

[0055] The detachable cavity bracket 5 is arranged inside the detachable housing 4; the cable fixing member 10 is detachably connected to the detachable cavity.

[0056] The circuit fixing board 8 is arranged on the detachable cavity bracket 5, and the circuit fixing board 8 is connected to the detachable housing 4 through the upper base bracket 6;

[0057] One end of the sensor fixing bracket 9 is connected to the circuit fixing board 8, and the other end of the sensor fixing bracket is connected to the monitoring module 1;

[0058] A power supply channel 7 is provided inside the circuit fixing plate 8 and the sensor fixing bracket 9 .

[0059] In this embodiment, the detachable shell 4 and the detachable bracket can be separated up and down and inside and outside during installation. The monitoring module 1 is fixed on the cable through the detachable shell 4 and the detachable bracket, and the monitoring module 1 and the data processing module 2 inside the shell are protected by the detachable shell 4.

[0060] In this embodiment, the circuit fixing board 8 is arranged on the detachable cavity bracket 5, and the circuit fixing board 8 is connected to the detachable shell 4 through the upper base plate bracket 6, so as to ensure the stability of the internal structure and provide a protective shell for the circuit inside the device.

[0061] In this embodiment, the cable fixing member 10 is a flexible fiber binding tape.

[0062] In this embodiment, the monitoring module 1 includes a strain vibration sensor.

[0063] In this embodiment, the strain vibration sensor is connected to the circuit fixing board 8 in the fixing module through a sensing fixing bracket 9, wherein a power supply channel 7 is provided inside the circuit fixing board 8 and the sensing fixing bracket 9, and the strain vibration sensor is powered through the power supply channel 7, and the vibration signal and deformation of the underground cable are monitored based on the strain vibration sensor.

[0064] In this embodiment, the data processing device includes a central processing unit;

[0065] The central processing unit includes a battery holder, and the central processing unit is nested inside the circuit fixing board 8;

[0066] The central processing unit is connected to the monitoring module 1 via the sensor fixing bracket 9 .

[0067] In this embodiment, the central processing unit is arranged inside the circuit fixing board 8 , and a battery holder is arranged in the central processing unit. The battery holder supplies power to the strain vibration sensor of the monitoring module 1 through the power supply channel 7 .

[0068] In this embodiment, the central processing unit acquires the vibration signal and deformation transmitted by the strain vibration sensor in real time, and extracts features of the vibration signal according to the data processing module 2, and determines whether there is a characteristic abnormality in the underground cable based on the extracted features; when there is a characteristic abnormality, the device information and characteristic abnormality data are uploaded through the communication module 3.

[0069] In this embodiment, the central processing unit performs feature extraction on the vibration signal to obtain the cable vibration characteristics; the cable vibration characteristics include peak value, mean value, standard deviation and spectrum, and calculates the characteristic difference between the vibration signal and the deformation amount based on the preset reference signal characteristic value and the reference expansion amount; and determines whether there are characteristic abnormalities in the cable vibration characteristics and deformation amount based on the preset threshold value and the characteristic difference.

[0070] In this embodiment, the communication module 3 includes a ZigBee communication module 3 , and the ZigBee communication module 3 is connected to the central processor, and the signal transmission between the device and the outside world is realized through the ZigBee communication module 3 .

[0071] In an optional embodiment, the communication module 3 further includes a power supply, and the ZigBee communication module 3 is powered by a built-in power supply.

[0072] In this embodiment, when there is a characteristic abnormality, the device information and characteristic abnormality data of the device are uploaded through the ZigBee communication module 3.

[0073] In this embodiment, by fixing the underground cable vibration deformation monitoring and fault location device to the outer sheath of underground cables such as direct burial, cable trenches, and cable tunnels, the material of the cable outer sheath is generally polyethylene, and the surface is relatively smooth. In order not to damage the outer sheath, the shell and cavity bracket of the device can be disassembled, and the cable outer sheath is used as a platform for fixed installation, and reinforced by flexible fiber binding tape. The internal strain and vibration sensors of the device can fit tightly to the surface of the cable outer sheath to monitor the vibration or deformation of the cable caused by external force impact. The central processing unit can read the sensor information in real time. If abnormal information is found, the signal and device number will be sent to the back-end for identification processing and calculation through the communication module 3, so as to achieve the function of identifying abnormal external force impact and fault location.

[0074] The present invention also provides a control method for an underground cable vibration deformation monitoring and fault location device, which is applied to the underground cable vibration deformation monitoring and fault location device.

[0075] The monitoring module 1 collects vibration signals and deformation amounts of underground cables, and transmits the vibration signals and deformation amounts to the data processing module 2;

[0076] Extracting features of the vibration signal according to the data processing module 2, and judging whether there is a characteristic abnormality of the underground cable according to the extracted features;

[0077] When there is a characteristic abnormality, the device information and characteristic abnormality data are uploaded through the communication module 3.

[0078] In this embodiment, by fixing the underground cable vibration deformation monitoring and fault locating device to the outer sheath of underground cables such as direct burial, cable trenches, and cable tunnels, the strain and vibration sensors inside the device can fit tightly to the surface of the cable outer sheath, monitor the vibration or deformation caused by external force impact on the cable, collect the vibration signal and deformation of the underground cable, and transmit the vibration signal and deformation to the central processor of the data processing module 2 for processing.

[0079] In this embodiment, the central processing unit extracts features from the vibration signal and determines whether there are feature anomalies in the underground cable based on the extracted features.

[0080] In this embodiment, the feature extraction of the vibration signal and judging whether the underground cable has feature abnormality according to the extracted features are specifically as follows:

[0081] Extracting features from the vibration signal to obtain cable vibration features; and calculating feature differences in deformation amounts of the cable vibration features;

[0082] It is determined whether the vibration characteristics and deformation amount of the cable are abnormal according to the preset threshold and the characteristic difference.

[0083] In this embodiment, the feature extraction of the vibration signal to obtain the cable vibration feature; and the characteristic difference of the deformation amount of the cable vibration feature is calculated, specifically:

[0084] Extracting characteristic values ​​of the vibration signal, wherein the characteristic values ​​include peak value, mean value, standard deviation and spectrum;

[0085] The characteristic difference between the vibration signal and the deformation amount is calculated according to the preset reference signal characteristic value and the reference expansion amount.

[0086] In this embodiment, the characteristic value F of the vibration signal is extracted i , the eigenvalue Fi Including peak value, mean value, standard deviation and spectrum, specifically:

[0087] P i =max(V i (t)) (1)

[0088]

[0089] FFT i =f(V i (t)) (4)

[0090] Among them, P i is the peak value, M i is the mean, σ i is the standard deviation, FFT i is the spectrum, V i (t) is the vibration signal.

[0091] In an optional embodiment, the extracted vibration signal feature F i and deformation Q i The normal signal characteristics F generated by the daily operation of the cable in the database n and normal expansion Q n Compare and calculate the feature difference D i =|F i -F n | or D i =|Q i -Q n |; If the feature difference D i Exceeding the preset threshold D t , it is considered an abnormal vibration signal or abnormal deformation pressure, and the cable operation may be damaged.

[0092] In this embodiment, the extracted vibration signal feature F i and deformation Q i Compare with the preset reference signal characteristic value and reference expansion amount, and calculate the characteristic difference D i , if the feature difference D i Exceeding the preset threshold D t , it is considered an abnormal vibration signal or abnormal deformation pressure, and the cable operation may be damaged.

[0093] In this embodiment, when the characteristic difference calculated by the central processor has characteristic abnormality, the monitoring device S i The abnormal signal feature difference value D i and its device code C i The data frame structure sent to the back-end system through the ZigBee communication module 3 is as follows: i ,Di}.

[0094] In this embodiment, the vibration or deformation of the cable caused by external force impact is monitored by the monitoring module 1. The central processing unit can read the sensor information in real time. If abnormal information is found, the signal and the device number are sent to the back-end for identification processing and calculation through the communication module 3 to achieve the function of identifying abnormal external force impact and locating the fault.

[0095] The present invention also provides a method for monitoring vibration deformation and locating faults of underground cables, comprising:

[0096] Calculating the monitoring points of the underground cables according to the preset interval distances, and setting the underground cable vibration deformation monitoring and fault locating device at each underground cable monitoring point;

[0097] Acquire device information and characteristic abnormal data of abnormal monitoring points transmitted by each device, and acquire location information of the monitoring points according to the device information;

[0098] The location information of each monitoring point and the corresponding characteristic abnormal data are input into the energy fluctuation attenuation model to obtain the cable fault location, and the cable fault section is calculated according to the cable fault location.

[0099] In this embodiment, the monitoring points of the underground cables are calculated according to the preset interval distance, specifically:

[0100] L i =L0+(i-1)d (5)

[0101] Where L0 is the installation location of the first monitoring device; d is the spacing between adjacent monitoring devices; L i is the installation location of the ith monitoring device.

[0102] Please refer to Figure 4 , Figure 4 A schematic diagram of the installation of an underground cable vibration deformation monitoring and fault locating device provided by an embodiment of the present invention.

[0103] In this embodiment, each monitoring point, that is, the installation position of each detection device, is calculated, and the underground cable vibration deformation monitoring and fault locating device is installed at the monitoring point of each underground cable, so that the monitoring module 1 of the device is close to the outer sheath of the cable.

[0104] In this embodiment, the device information and characteristic abnormal data transmitted by each monitoring point are obtained, and each device number C i Get the monitoring point position x i .

[0105] In this embodiment, the location information of each monitoring point and the corresponding characteristic abnormal data are input into the energy fluctuation attenuation model to obtain the cable fault location. The energy fluctuation attenuation model is specifically:

[0106] f(x)=a·x c +b

[0107] Where a is the characteristic difference value D measured by different devices i , b is the error constant, and c is the attenuation constant.

[0108] In this embodiment, the characteristic difference values ​​D measured by the devices at different positions are i Substituting into f(x), we can find the constants b and c. i >D t When the cable is subjected to abnormal vibration and deformation, the cable condition may be damaged, where D t is the preset threshold.

[0109] In this embodiment, the preset threshold D t Substitute the initial energy into the energy fluctuation attenuation model to calculate the cable fault location. Specifically:

[0110] D t =a·x c +b (6)

[0111] Please refer to Figure 5 , Figure 5 A schematic diagram of cable abnormality monitoring provided by an embodiment of the present invention.

[0112] In this embodiment, the cable fault location is obtained, and the cable fault section is calculated based on the cable fault location, specifically: x1 is calculated based on the energy fluctuation attenuation model to be the location point of the abnormal state on one side of the cable, and because the attenuation of the characteristic difference value decays along the two directions of the cable, the data measured by the device on the other side is brought in to obtain the abnormal state position x2 of the cable on the other side. If the total length of the cable is L, the abnormal fault section of the cable is l=L-x1-x2.

[0113] In an embodiment of the present invention, a multi-device access platform processing device is also provided, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the above-mentioned multi-device access platform processing method is implemented.

[0114] In an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the above-mentioned multi-device access platform processing method.

[0115] Exemplarily, the computer program may be divided into one or more modules, one or more modules are stored in a memory and executed by a processor to implement the present invention. One or more modules may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program in the multi-device access platform processing device.

[0116] The multi-device access platform processing device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The multi-device access platform processing device may include, but is not limited to, a processor, a memory, and a display. Those skilled in the art will appreciate that the above components are merely examples of the multi-device access platform processing device and do not constitute a limitation on the multi-device access platform processing device. It may include more or fewer components than the components, or a combination of certain components, or different components. For example, the multi-device access platform processing device may also include input and output devices, network access devices, buses, and the like.

[0117] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the multi-device access platform processing device, and uses various interfaces and lines to connect various parts of the entire multi-device access platform processing device.

[0118] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the multi-device access platform processing device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, a text conversion function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, text message data, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0119] Among them, if the module based on the processing of the multi-device access platform is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0120] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An underground cable vibration deformation monitoring and fault location device, characterized in that: include: A monitoring module, a data processing module, a communication module and a fixed module; the fixed module is connected to the monitoring module, the data processing module and the communication module respectively; the monitoring module is connected to the data processing module, and the data processing module is connected to the communication module; The monitoring module is used to monitor the vibration signal and deformation of the underground cable; the data processing module is used to calculate whether the vibration signal and deformation meet the preset threshold; and the communication module is used to exchange data with the outside world.

2. The underground cable vibration deformation monitoring and fault location device according to claim 1, characterized in that: The fixing module includes a detachable cavity bracket, a detachable shell, an upper base bracket, a circuit fixing plate, a sensor fixing bracket and a cable fixing piece; The detachable cavity bracket is arranged inside the detachable shell; the cable fixing piece is detachably connected to the detachable cavity. The circuit fixing plate is arranged on the detachable cavity bracket, and the circuit fixing plate is connected to the detachable housing through an upper base plate bracket; One end of the sensor fixing bracket is connected to the circuit fixing board, and the other end of the sensor fixing bracket is connected to the monitoring module; The circuit fixing plate and the sensor fixing bracket are provided with power supply channels inside.

3. The underground cable vibration deformation monitoring and fault location device according to claim 1, characterized in that: The cable fixing piece is a flexible fiber binding tape.

4. The underground cable vibration deformation monitoring and fault location device according to claim 1, characterized in that: The monitoring module includes a strain vibration sensor.

5. The underground cable vibration deformation monitoring and fault location device according to claim 2, characterized in that: The data processing device includes a central processing unit; The central processing unit includes a battery holder, and the central processing unit is nested inside the circuit fixing board; The central processing unit is connected to the monitoring module via the sensor fixing bracket.

6. The underground cable vibration deformation monitoring and fault location device according to claim 2, characterized in that: The communication module is fixedly arranged on the upper surface of the detachable housing.

7. A control method for an underground cable vibration deformation monitoring and fault location device, characterized in that: An underground cable vibration deformation monitoring and fault location device as claimed in any one of claims 1 to 6 The monitoring module collects vibration signals and deformation amounts of underground cables, and transmits the vibration signals and deformation amounts to the data processing module; Extracting features of the vibration signal according to the data processing module, and judging whether there is a characteristic abnormality in the underground cable according to the extracted features; When there is a characteristic abnormality, the device information and characteristic abnormality data are uploaded through the communication module.

8. The control method of the underground cable vibration deformation monitoring and fault location device according to claim 7, characterized in that: The feature extraction of the vibration signal and judging whether the underground cable has feature abnormality according to the extracted features are specifically as follows: Extracting features from the vibration signal to obtain cable vibration features; and calculating feature differences in deformation amounts of the cable vibration features; It is determined whether the vibration characteristics and deformation amount of the cable are abnormal according to the preset threshold and the characteristic difference.

9. A control method for an underground cable vibration deformation monitoring and fault location device as claimed in claim 8, characterized in that: The feature extraction of the vibration signal to obtain the cable vibration feature; and the calculation of the feature difference of the deformation amount of the cable vibration feature are specifically as follows: Extracting characteristic values ​​of the vibration signal, wherein the characteristic values ​​include peak value, mean value, standard deviation and spectrum; The characteristic difference between the vibration signal and the deformation amount is calculated according to the preset reference signal characteristic value and the reference expansion amount.

10. A method for monitoring vibration deformation and locating faults of underground cables, characterized in that: include: Calculating the monitoring points of the underground cables according to the preset interval distances, and setting an underground cable vibration deformation monitoring and fault locating device as claimed in any one of claims 1 to 6 at each underground cable monitoring point; Acquire device information and characteristic abnormal data of abnormal monitoring points transmitted by each device, and acquire location information of the monitoring points according to the device information; The location information of each monitoring point and the corresponding characteristic abnormal data are input into the energy fluctuation attenuation model to obtain the cable fault location, and the cable fault section is calculated according to the cable fault location.

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