Mining cable fault detection method and system and storage medium

Abstract

The present application relates to cable fault detection technical field, specifically speaking is mine cable fault detection method, system and storage medium, including detection box, mine cable fault detection system, interface, drying assembly, rotating plate, cooling fan, drying box, heating rod and air outlet, in the present application, after the use of detection box is completed, first start motor, at this time, the motor drives the rotating shaft and the rotating plate to rotate, when the drying box on one side of the rotating plate is connected to the inside of the interface, start the heating rod, the heating rod will emit heat, so as to increase the temperature inside the drying box, after the heating rod starts for 10-15 minutes, start the cooling fan, at this time, the cooling fan will gather the external air into airflow, blow into the inside of the drying box, the airflow wraps hot air into the inside of the interface through the air outlet, so as to neutralize with the wet air in the inside of the interface, so as to dry the moisture in the inside of the interface, avoid the influence of moisture on the service life of the interface.

Description

Technical Field

[0001] This invention relates to the field of cable fault detection technology, specifically to a method, system, and storage medium for detecting faults in mining cables. Background Technology

[0002] Fault detection for mining cables needs to consider three core requirements: explosion-proof, anti-interference, and accurate positioning. The mainstream methods are divided into two categories: offline detection and online monitoring. The system is based on the architecture of "sensing-transmission-analysis-early warning". The storage media covers local and cloud, and it can realize the whole process management of fault early warning, ranging, and accurate positioning.

[0003] Traditional mining cable fault detection equipment can detect cable faults, but the connection ports of the equipment are mostly located on the outer wall of the box. If the equipment is operated in a humid environment, moisture will enter the interface during use, which will cause the interface to rust or be damaged over time. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method, system, and storage medium for detecting faults in mining cables that can dry out moisture that enters the interface during use.

[0005] To address the problems in the prior art, this invention provides a fault detection system for mining cables, comprising: Testing equipment; The strong noise suppression and sound wave enhancement module consists of a narrowband ultrasonic sensor, multiple probes, and a signal noise reduction unit. The narrowband ultrasonic sensor can focus on the fault discharge ultrasonic signal to achieve beamforming directional acquisition, while the signal noise reduction unit adopts an integrated adaptive noise reduction, wavelet denoising, and spectral subtraction three-level noise reduction algorithm. The testing equipment includes a testing box, with the interface located on the outer wall of the testing box. The drying assembly is installed on the testing box, and the rotating plate is fixedly connected to the outer wall of the rotating shaft. The rotating plate has an installation cylinder inside, and the cooling fan is installed inside the rotating plate. A filter screen is provided on one side of the cooling fan. The drying box is fixedly installed on one side of the rotating plate, and the interface is snapped into one side of the drying box. Multiple sets of heating rods are fixedly installed inside the drying box to provide heat to dry the moisture inside the interface. Multiple sets of air outlets are fixedly opened on the side wall of the drying box to allow hot air to enter the interior of the interface. Two sets of connecting plates are fixedly installed on the side wall of the testing box. A set of rotating shafts is rotatably connected between the two sets of connecting plates. One end of the rotating shaft is fixedly connected to the output shaft of a motor. The motor is fixedly installed on the side wall of one of the sets of connecting plates.

[0006] Specifically, the strong noise suppression and sound wave enhancement module and the sound wave attenuation compensation module are connected. The sound wave attenuation compensation module is equipped with a contact-coupled sound wave probe, a vibration-assisted detection unit, and a high-voltage impact energy adjustment unit. It can be directly pressed onto the cable sheath, cable tray, or hook to receive sound waves through solid conduction. The vibration-assisted detection unit is equipped with a micro-vibration sensor to capture the mechanical vibration generated by fault discharge. The high-voltage impact energy adjustment unit can appropriately increase the impact voltage to enhance the intensity of the fault discharge sound signal.

[0007] Specifically, the acoustic attenuation compensation module and the intermittent fault capture module are connected. The intermittent fault capture module is equipped with a continuous pulse impact unit, a sliding window correlation algorithm unit, and a dual-signal mutual verification unit. The continuous pulse impact unit can realize multiple, continuous high-voltage pulse impacts to accumulate fault discharge signals. The sliding window correlation algorithm unit locks the time window with a magnetic signal and performs correlation analysis on the intermittent acoustic signals. The dual-signal mutual verification unit links the acoustic signal and the vibration signal. If either signal is valid, fixed-point detection can be maintained, avoiding detection failure due to the loss of a single signal.

[0008] Specifically, the intermittent fault capture module and the magnetic signal anti-interference and time difference calibration module are connected. The magnetic signal anti-interference and time difference calibration module is equipped with a shielded ferrite rod antenna, a hardware clock synchronization unit, and a waveform correlation delay algorithm unit. The shielded ferrite rod antenna uses a metal shielding shell to suppress spatial electromagnetic interference and ensure stable acquisition of magnetic pulse signals. The hardware clock synchronization unit uses the same high-precision clock source to synchronously trigger the acquisition of acoustic and magnetic signals and eliminate time drift. The waveform correlation delay algorithm unit calculates the acoustic and magnetic signal delay through waveform similarity, replacing the traditional threshold triggering and improving the accuracy of time difference calculation.

[0009] Specifically, the magnetic signal anti-interference and time difference calibration module and the multi-cable differentiation module are connected. The multi-cable differentiation module includes a cable identification unit, a directional magnetic antenna unit, and a signal strength comparison unit. The multi-cable differentiation module can inject a low-frequency identification signal at the beginning of the faulty cable, which is linked with the faulty acoustic-magnetic signal. The directional magnetic antenna unit determines the source of the magnetic signal by adjusting the antenna direction and distinguishes the positions of different cables. The software in the signal strength comparison unit automatically records the acoustic-magnetic signal intensity during the probe's movement, marks the path of the maximum signal, and locks the faulty cable.

[0010] On the other hand, the present invention also provides a method for a fault detection system for mining cables, the method comprising the following steps: S1. The multi-cable differentiation module and the long-distance accuracy improvement module are connected. The long-distance accuracy improvement module is equipped with a segmented approximation control unit, an acoustic-magnetic signal intensity cloud map unit, and a multi-method fusion unit. The segmented approximation control unit is combined with the traveling wave method. S2. The coarse ranging result of the low-voltage pulse method is used to move the probe in stages to gradually narrow the fault range. The acoustomagnetic signal intensity cloud map unit collects signal intensity data in real time and generates a visual cloud map to intuitively display the fault point area. The multi-method fusion unit can use the linkage traveling wave ranging and acoustomagnetic positioning to first determine the approximate range using the ranging method and then use the acoustomagnetic method to precisely locate the fault.

[0011] On the other hand, the present invention also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor as described above.

[0012] The beneficial effects of this invention are: 1. In this invention, the heating rod generates heat, which is then blown into the interior of the interface by the cooling fan. The hot airflow and the cold airflow inside the interface converge, which can slowly dry the moisture inside the interface and prevent the moisture from affecting the interface.

[0013] 2. The strong noise suppression and sound wave enhancement module in this invention can directionally enhance the sound wave signal at the fault point, filter out low-frequency noise in the tunnel environment, and improve the signal-to-noise ratio of the sound wave signal; by locking the direction of the signal source through the array probe, environmental noise interference is reduced, and weak sound wave signals are effectively detected.

[0014] 3. The acoustic wave attenuation compensation module in this invention can change the propagation path of acoustic waves, reduce attenuation through solid conduction, supplement with vibration signals to solve the problems of acoustic waves being unable to penetrate the shielding layer and water accumulation, and enhance the discharge signal strength to ensure that the signal is effectively transmitted to the detection terminal.

[0015] 4. In this invention, the intermittent fault capture module can improve the detection rate of weak and discontinuous signals by signal accumulation and superposition; and by using dual signal mutual verification, it solves the signal interruption problem caused by intermittent discharge, ensuring that the positioning process is continuous and stable. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall side component connection structure of the present invention; Figure 3 This is a cross-sectional view of the drying component in this invention; Figure 4 In this invention Figure 2 Enlarged view of point A; Figure 5 This is a flowchart of the operation of the mining cable fault detection system in this invention.

[0018] In the diagram: 1. Testing box; 111. Interface; 2. Drying assembly; 210. Connecting plate; 211. Rotating shaft; 212. Motor; 213. Rotating plate; 214. Cooling fan; 215. Drying box; 216. Heating rod; 217. Air outlet. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Example 1: like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The mining cable fault detection equipment shown includes a detection box 1, with an interface 111 located on the outer wall of the detection box 1. A drying assembly 2 is mounted on the detection box 1. A rotating plate 213 is fixedly connected to the outer wall of a rotating shaft 211. An installation cylinder is located inside the rotating plate 213. A cooling fan 214 is installed inside the rotating plate 213, and a filter screen is located on one side of the cooling fan 214. A drying box 215 is fixedly mounted on one side of the rotating plate 213, and one side of the drying box 215 engages with the interior of the interface 111. Multiple sets of... Heating rod 216 is fixedly installed inside drying chamber 215, providing heat to dry the moisture in interface 111. Multiple sets of air outlets 217 are fixedly opened on the side wall of drying chamber 215, allowing hot air to enter the interior of interface 111. Two sets of connecting plates 210 are fixedly installed on the side wall of detection box 1. A set of rotating shafts 211 is rotatably connected between the two sets of connecting plates 210. One end of the rotating shaft 211 is fixedly connected to the output shaft of motor 212. Motor 212 is fixedly installed on the side wall of one set of connecting plates 210.

[0021] As described above, after the testing box 1 is used, the motor 212 is started first. At this time, the motor 212 will drive the rotating shaft 211 and the rotating plate 213 to rotate. After the drying box 215 on one side of the rotating plate 213 is engaged with the inside of the interface 111, the heating rod 216 is started. The heating rod 216 will emit heat to increase the temperature inside the drying box 215. After the heating rod 216 has been running for 10-15 minutes, the cooling fan 214 is started. At this time, the cooling fan 214 will gather the outside air into an airflow and blow it into the inside of the drying box 215. The airflow carries hot air and enters the inside of the interface 111 through the air outlet 217, thereby neutralizing the humid air inside the interface 111 and drying the moisture inside the interface 111. This prevents the moisture from affecting the service life of the interface 111. In addition, the drying box 215 can block the interface 111 to prevent contaminants from entering the inside of the interface 111.

[0022] according to Figure 5 As shown, the mining cable fault detection system uses detection equipment as a carrier. The mining cable fault detection system is equipped with a strong noise suppression and sound wave enhancement module. The strong noise suppression and sound wave enhancement module consists of a narrowband ultrasonic sensor, multiple probes, and a signal noise reduction unit. The narrowband ultrasonic sensor can focus on the fault discharge ultrasonic signal and avoid the low-frequency mechanical noise band. The probe adopts a 4-8 channel array to achieve beamforming directional acquisition. The signal noise reduction unit adopts an integrated adaptive noise reduction, wavelet denoising, and spectral subtraction three-level noise reduction algorithm.

[0023] As shown above, the strong noise suppression and acoustic enhancement module can directionally enhance the acoustic signal at the fault point, filter out low-frequency noise in the tunnel environment, and improve the signal-to-noise ratio of the acoustic signal; by locking the direction of the signal source through the array probe, environmental noise interference is reduced, and weak acoustic signals are effectively detected.

[0024] Preferably, the strong noise suppression and sound wave enhancement module and the sound wave attenuation compensation module are connected. The sound wave attenuation compensation module is equipped with a contact-coupled sound wave probe, a vibration-assisted detection unit, and a high-voltage impact energy adjustment unit. It can be directly pressed onto the cable sheath, cable tray, or hook to receive sound waves through solid conduction. The vibration-assisted detection unit is equipped with a micro-vibration sensor to capture the mechanical vibration generated by fault discharge. The high-voltage impact energy adjustment unit can appropriately increase the impact voltage to enhance the intensity of the fault discharge sound signal.

[0025] As shown above, the acoustic wave attenuation compensation modules can change the propagation path of acoustic waves, reduce attenuation through solid conduction, supplement with vibration signals to solve the problems of acoustic waves being unable to penetrate the shielding layer and water accumulation, and enhance the discharge signal strength to ensure that the signal is effectively transmitted to the detection terminal.

[0026] Preferably, the acoustic attenuation compensation module and the intermittent fault capture module are connected. The intermittent fault capture module includes a continuous pulse impact unit, a sliding window correlation algorithm unit, and a dual-signal mutual verification unit. The continuous pulse impact unit can perform multiple, continuous high-voltage pulse impacts to accumulate fault discharge signals. The sliding window correlation algorithm unit locks the time window with a magnetic signal to perform correlation analysis on the intermittent acoustic signals. The dual-signal mutual verification unit links the acoustic signal and the vibration signal. If either signal is valid, fixed-point detection can be maintained, avoiding detection failure due to the loss of a single signal.

[0027] As shown above, the detection rate of weak and intermittent signals is improved by signal accumulation and superposition; the signal interruption problem caused by intermittent discharge is solved by using dual signal mutual verification, ensuring that the positioning process is continuous and stable.

[0028] Preferably, the intermittent fault capture module and the magnetic signal anti-interference and time difference calibration module are modularly connected. The magnetic signal anti-interference and time difference calibration module is equipped with a shielded ferrite rod antenna, a hardware clock synchronization unit, and a waveform correlation delay algorithm unit. The shielded ferrite rod antenna uses a metal shielding shell to suppress spatial electromagnetic interference and ensure stable acquisition of magnetic pulse signals. The hardware clock synchronization unit uses the same high-precision clock source to synchronously trigger the acquisition of acoustic and magnetic signals, eliminating time drift. The waveform correlation delay algorithm unit calculates the acoustic and magnetic signal delay through waveform similarity, replacing the traditional threshold triggering and improving the accuracy of time difference calculation.

[0029] As shown above, the magnetic signal anti-interference and time difference calibration module filters out the influence of electromagnetic interference on the magnetic signal to ensure accurate magnetic signal triggering; it also calibrates the time difference of the acoustic-magnetic signal to reduce time delay calculation errors and improve positioning accuracy.

[0030] Preferably, the magnetic signal anti-interference and time difference calibration module and the multi-cable differentiation module are connected. The multi-cable differentiation module includes a cable identification unit, a directional magnetic antenna unit, and a signal strength comparison unit. The multi-cable differentiation module can inject a low-frequency identification signal at the beginning of the faulty cable, which is linked with the faulty acoustic-magnetic signal. The directional magnetic antenna unit determines the source of the magnetic signal by adjusting the antenna direction and distinguishes the positions of different cables. The software in the signal strength comparison unit automatically records the acoustic-magnetic signal intensity during the probe's movement, marks the path of the maximum signal, and locks the faulty cable.

[0031] As shown above, the multi-cable differentiation module can accurately distinguish faulty cables in multi-cable parallel scenarios, avoid misjudgment of location caused by signal crosstalk, and improve the detection reliability in complex laying environments.

[0032] Preferably, the multi-cable differentiation module and the long-distance accuracy improvement module are connected. The long-distance accuracy improvement module is equipped with a segmented approximation control unit, an acoustic-magnetic signal intensity cloud map unit, and a multi-method fusion unit. The segmented approximation control unit is combined with the traveling wave method. Alternatively, the coarse ranging result of the low-voltage pulse method can be used to move the probe in stages to gradually narrow down the fault range. The acoustomagnetic signal intensity cloud map unit collects signal intensity data in real time and generates a visual cloud map to intuitively display the fault point area. The multi-method fusion unit can use the linkage traveling wave ranging and acoustomagnetic positioning to first determine the approximate range using the ranging method and then use the acoustomagnetic method to precisely locate the fault.

[0033] As shown above, the long-distance accuracy improvement module can solve the problem of insufficient long-distance positioning accuracy. By segmented approximation and visualization assistance, it can improve positioning efficiency and accuracy, and ensure that the fault point positioning error is controlled within ±1m in long-distance scenarios.

[0034] On the other hand, the present invention also provides a method for a fault detection system for mining cables, the method comprising the following steps: S1. The multi-cable differentiation module and the long-distance accuracy improvement module are connected. The long-distance accuracy improvement module is equipped with a segmented approximation control unit, an acoustic-magnetic signal intensity cloud map unit, and a multi-method fusion unit. The segmented approximation control unit is combined with the traveling wave method. S2. The coarse ranging result of the low-voltage pulse method is used to move the probe in stages to gradually narrow the fault range. The acoustomagnetic signal intensity cloud map unit collects signal intensity data in real time and generates a visual cloud map to intuitively display the fault point area. The multi-method fusion unit can use the linkage traveling wave ranging and acoustomagnetic positioning to first determine the approximate range using the ranging method and then use the acoustomagnetic method to precisely locate the fault.

[0035] On the other hand, the present invention also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor as described above.

[0036] Those skilled in the art will understand that embodiments of the present invention can be methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or a combination of hardware and software embodiments. Furthermore, the present invention can be implemented as a computer program product on one or more storage media (including disk storage, CD-ROM, optical storage) containing computer program code.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A fault detection system for mining cables, characterized in that: include: Testing equipment; The strong noise suppression and sound wave enhancement module consists of a narrowband ultrasonic sensor, multiple probes, and a signal noise reduction unit. The narrowband ultrasonic sensor can focus on the fault discharge ultrasonic signal to achieve beamforming directional acquisition, while the signal noise reduction unit adopts an integrated adaptive noise reduction, wavelet denoising, and spectral subtraction three-level noise reduction algorithm. The testing equipment includes a testing box, with the interface located on the outer wall of the testing box. The drying assembly is installed on the testing box, and the rotating plate is fixedly connected to the outer wall of the rotating shaft. The rotating plate has an installation cylinder inside, and the cooling fan is installed inside the rotating plate. A filter screen is provided on one side of the cooling fan. The drying box is fixedly installed on one side of the rotating plate, and the interface is snapped into one side of the drying box. Multiple sets of heating rods are fixedly installed inside the drying box to provide heat to dry the moisture inside the interface. Multiple sets of air outlets are fixedly opened on the side wall of the drying box to allow hot air to enter the interior of the interface. Two sets of connecting plates are fixedly installed on the side wall of the testing box. A set of rotating shafts is rotatably connected between the two sets of connecting plates. One end of the rotating shaft is fixedly connected to the output shaft of a motor. The motor is fixedly installed on the side wall of one of the sets of connecting plates.

2. The mining cable fault detection system according to claim 1, characterized in that: The strong noise suppression and sound wave enhancement module and the sound wave attenuation compensation module are connected. The sound wave attenuation compensation module is equipped with a contact-coupled sound wave probe, a vibration-assisted detection unit, and a high-pressure impact energy adjustment unit.

3. The mining cable fault detection system according to claim 2, characterized in that: The vibration-assisted detection unit is equipped with a micro-vibration sensor to capture the mechanical vibration generated by fault discharge. The high-voltage impact energy adjustment unit can appropriately increase the impact voltage and enhance the intensity of the fault discharge acoustic signal.

4. The mining cable fault detection system according to claim 3, characterized in that: The acoustic attenuation compensation module and the intermittent fault capture module are connected. The intermittent fault capture module is equipped with a continuous pulse impact unit, a sliding window correlation algorithm unit, and a dual-signal mutual verification unit. The continuous pulse impact unit can realize multiple, continuous high-voltage pulse impacts to accumulate fault discharge signals. The sliding window correlation algorithm unit locks the time window with a magnetic signal to perform correlation analysis on the intermittent acoustic signals. The dual-signal mutual verification unit links the acoustic signal and the vibration signal. If either signal is valid, fixed-point detection can be maintained, avoiding detection failure due to the loss of a single signal.

5. The mining cable fault detection system according to claim 4, characterized in that: The intermittent fault capture module and the magnetic signal anti-interference and time difference calibration module are connected. The magnetic signal anti-interference and time difference calibration module is equipped with a shielded ferrite rod antenna, a hardware clock synchronization unit, and a waveform correlation delay algorithm unit. The shielded ferrite rod antenna uses a metal shielding shell to suppress spatial electromagnetic interference and ensure stable acquisition of magnetic pulse signals. The hardware clock synchronization unit uses the same high-precision clock source to synchronously trigger the acquisition of acoustic and magnetic signals and eliminate time drift. The waveform correlation delay algorithm unit calculates the acoustic and magnetic signal delay through waveform similarity, replacing the traditional threshold triggering and improving the accuracy of time difference calculation.

6. The mining cable fault detection system according to claim 5, characterized in that: The magnetic signal anti-interference and time difference calibration module and the multi-cable differentiation module are connected. The multi-cable differentiation module includes a cable identification unit, a directional magnetic antenna unit, and a signal strength comparison unit. The multi-cable differentiation module can inject a low-frequency identification signal at the beginning of the faulty cable, which is linked with the faulty acoustic-magnetic signal. The directional magnetic antenna unit determines the source of the magnetic signal by adjusting the antenna direction and distinguishes the positions of different cables. The software in the signal strength comparison unit automatically records the acoustic-magnetic signal intensity during the probe's movement, marks the path of the maximum signal, and locks the faulty cable.

7. The method for detecting faults in mining cables according to claim 6, characterized in that: The method includes the following steps: S1. The multi-cable differentiation module and the long-distance accuracy improvement module are connected. The long-distance accuracy improvement module is equipped with a segmented approximation control unit, an acoustic-magnetic signal intensity cloud map unit, and a multi-method fusion unit. The segmented approximation control unit is combined with the traveling wave method. S2. The coarse ranging result of the low-voltage pulse method is used to move the probe in stages to gradually narrow the fault range. The acoustomagnetic signal intensity cloud map unit collects signal intensity data in real time and generates a visual cloud map to intuitively display the fault point area. The multi-method fusion unit can use the linkage traveling wave ranging and acoustomagnetic positioning to first determine the approximate range using the ranging method and then use the acoustomagnetic method to precisely locate the fault.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program is executed by a processor as described in claim 7.

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