Multi-core cable detection method, system and device, computer equipment and storage medium

Abstract

The invention relates to the technical field of electric power, in particular to a multi-core cable detection method, system and device, computer equipment and a storage medium. The method comprises the following steps: intercepting a plurality of low-voltage pulse signals with preset frequencies sent for a plurality of wire cores, wherein the low-voltage pulse signals are in one-to-one correspondence with the wire cores; for each low-voltage pulse signal, detecting whether the frequency of the low-voltage pulse signal is matched with a preset frequency, and obtaining a core alignment detection result corresponding to the low-voltage pulse signal; and under the condition that the core alignment detection result represents core alignment failure, based on the low-voltage pulse signal, performing fault detection on the wire core corresponding to the low-voltage pulse signal to obtain a fault detection result. By adopting the method, the detection accuracy of the multi-core cable can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electricity, and particularly to a multi-core cable detection method, device, computer device, computer-readable storage medium, and computer program product. Background Art

[0002] In many fields such as current electricity, communication, industrial automation control, and rail transit, cables, as key carriers for electric energy transmission and signal transfer, play an indispensable role. Multi-core cables are widely used because they can transmit multiple signals or electric energy within one cable. A multi-core cable usually includes multiple insulated core wires, which are wrapped in the same outer sheath. The number, wire diameter, material of the core wires, and the characteristics of the insulating layer may vary due to different application scenarios. When connecting cables, it is necessary to ensure that each core wire can be accurately connected to the corresponding interface or device end. Any misconnection, missed connection, or poor connection of a core wire may lead to faults or even damage to the entire system.

[0003] For the core alignment detection of multi-core cables, in traditional solutions, usually, testers use a multimeter and a continuity tester to measure the continuity between core wires one by one, and determine the corresponding relationship of the core wires by marking or recording. However, for cables with a large number of core wires, the detection process is time-consuming and laborious, and manual detection is easily affected by factors such as the experience, skill level, and fatigue of the testers, with a high risk of misjudgment. Therefore, there is a problem of low accuracy in core alignment detection in traditional multi-core cable core alignment solutions. Summary of the Invention

[0004] Based on this, it is necessary to provide a multi-core cable detection method, device, computer device, computer-readable storage medium, and computer program product that can improve the accuracy of core alignment detection for the above technical problems.

[0005] In a first aspect, the present application provides a multi-core cable detection method, including:

[0006] Intercepting multiple low-voltage pulse signals with multiple preset frequencies sent to multiple core wires, where the low-voltage pulse signals correspond to the core wires one by one;

[0007] For each low-voltage pulse signal, detecting whether the frequency of the low-voltage pulse signal matches the preset frequency to obtain a core alignment detection result corresponding to the low-voltage pulse signal;

[0008] In the case where the core alignment detection result indicates a core alignment failure, based on the low-voltage pulse signal, performing a fault detection on the core wire corresponding to the low-voltage pulse signal to obtain a fault detection result.

[0009] In one embodiment, intercepting multiple low-voltage pulse signals with multiple preset frequencies sent to multiple core wires includes:

[0010] For each core, determine whether a low-voltage pulse signal corresponding to the core is intercepted;

[0011] Based on the low-voltage pulse signal, perform a fault detection on the core corresponding to the low-voltage pulse signal to obtain a fault detection result, including:

[0012] If the low-voltage pulse signal corresponding to the core is not intercepted within a preset detection time, determine that the fault type of the core is an open-circuit fault.

[0013] In one embodiment, based on the low-voltage pulse signal, performing a fault detection on the core corresponding to the low-voltage pulse signal to obtain a fault detection result further includes:

[0014] If the intensity and period of the intercepted low-voltage pulse signal do not match the intensity and period of the low-voltage pulse signal with a preset frequency sent for the core, determine that the fault type of the core is an open-circuit fault.

[0015] In one embodiment, based on the low-voltage pulse signal, performing a fault detection on the core corresponding to the low-voltage pulse signal to obtain a fault detection result further includes:

[0016] For each core, if multiple low-voltage pulse signals are intercepted within a preset detection time, determine that the fault type of the core is a short-circuit fault.

[0017] In one embodiment, the multi-core cable includes a metal shielding layer; based on the low-voltage pulse signal, performing a fault detection on the core corresponding to the low-voltage pulse signal to obtain a fault detection result further includes:

[0018] For each low-voltage pulse signal, detect whether there is a voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer;

[0019] If there is no voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer, determine that the fault type of the core is a ground fault.

[0020] In one embodiment, based on the low-voltage pulse signal, performing a fault detection on the core corresponding to the low-voltage pulse signal to obtain a fault detection result further includes:

[0021] For each low-voltage pulse signal, if no voltage signal of the metal shielding layer of the core corresponding to the low-voltage pulse signal is detected, determine that the fault type of the core is cable damage.

[0022] In one embodiment, the low-voltage pulse signals with multiple preset frequencies are respectively the low-voltage pulse signals transmitted in sequence according to the serial numbers of the cores of the multi-core cable;

[0023] After obtaining the fault detection result, the method further includes:

[0024] When the fault detection result indicates that there is a fault in the core corresponding to the low-voltage pulse signal, determine the serial number of the faulty core based on the reception serial number of the low-voltage pulse signal.

[0025] In a second aspect, the present application further provides a multi-core cable detection system, including: a multi-core cable to be detected, a signal transmitter, and a signal receiver. The signal transmitter and the signal receiver are respectively connected to the cores and the metal shielding layer at both ends of the multi-core cable to be detected;

[0026] The signal transmitter is configured to: sequentially transmit low-voltage pulse signals with a preset frequency according to the serial numbers of the cores of the multi-core cable to be detected;

[0027] The signal receiver is configured to: intercept a plurality of low-voltage pulse signals with a preset frequency transmitted by the signal transmitter, analyze the frequency characteristics of each low-voltage pulse signal, detect whether the frequency of each low-voltage pulse signal matches the preset frequency, obtain the pair-core detection result, and perform fault detection on the multi-core cable when the pair-core detection result indicates pair-core failure to obtain the fault detection result.

[0028] In a third aspect, the present application further provides a multi-core cable detection device, including:

[0029] A signal interception module for intercepting a plurality of low-voltage pulse signals with a preset frequency sent to a plurality of cores, and the low-voltage pulse signals correspond to the cores one by one;

[0030] A pair-core detection module for detecting whether the frequency of each low-voltage pulse signal matches the preset frequency for each low-voltage pulse signal to obtain the pair-core detection result corresponding to the low-voltage pulse signal;

[0031] A fault detection module for performing fault detection on the core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal when the pair-core detection result indicates pair-core failure to obtain the fault detection result.

[0032] In a fourth aspect, the present application further provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps in any one of the embodiments of the multi-core cable detection method described above are implemented.

[0033] In a fifth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in any one of the embodiments of the multi-core cable detection method described above are implemented.

[0034] In a sixth aspect, the present application also provides a computer program product, including a computer program, which when executed by a processor implements the steps in any one of the above-described multi-core cable detection method embodiments.

[0035] The above multi-core cable detection method, system, device, computer device, computer-readable storage medium, and computer program product, on the one hand, are different from the traditional manual core detection method. Through the automated core detection method, the possibility of misjudgment in manual detection is reduced, and the accuracy and efficiency of core detection are improved. On the other hand, by setting a detection signal with a specific frequency and transmitting a low-voltage pulse signal with a preset frequency to multiple cores of the multi-core cable, it is beneficial to reduce the interference of the detection site environment and improve the reliability of core detection. Thus, for each low-voltage pulse signal, it is detected whether the frequency of the low-voltage pulse signal matches the preset frequency. In this way, based on the signal frequency analysis method, core detection is performed to obtain the core detection result, further improving the accuracy of core detection, which is beneficial to judging whether the core connection of the cable meets the standard based on the core detection result, and further beneficial to reducing the possibility of cable system failures or damages caused by incorrect wiring or missed connections of multi-core cables, and improving the safety and reliability of system operation. On the other hand, the integrated fault detection function automatically performs fault detection to obtain the fault detection result in the case where the core detection result indicates a core detection failure, which is beneficial to timely reminding the operation and maintenance personnel to take corresponding maintenance measures and improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the following-described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a structural block diagram of a multi-core cable detection system in an embodiment;

[0038] Figure 2 It is a flowchart of a multi-core cable detection method in an embodiment;

[0039] Figure 3 It is a flowchart of a multi-core cable detection method in another embodiment;

[0040] Figure 4 It is a structural block diagram of a signal transmitter and a signal receiver in an embodiment;

[0041] Figure 5 It is a connection diagram of a signal transmitter and a signal receiver in an embodiment;

[0042] Figure 6 Flow schematic diagram of the multi-core cable detection method in another embodiment;

[0043] Figure 7 Structural block diagram of the multi-core cable detection device in one embodiment;

[0044] Figure 8 Internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] The multi-core cable detection method provided by the embodiments of the present application can be applied to, for example, Figure 1 the multi-core cable detection system shown in the figure. Among them, the signal transmitting end 102 and the signal receiving end 104 are respectively connected to the cores at both ends of the multi-core cable to be detected, and moreover, the signal transmitting end 102 and the signal receiving end 104 are respectively connected to the metal shielding layer of the multi-core cable to be detected to form a detection loop.

[0047] Specifically, it can be that the signal transmitting end 102 sequentially transmits low-voltage pulse signals with preset frequencies for each core of the multi-core cable to be detected, the signal receiving end 104 intercepts signals for each core, intercepts multiple low-voltage pulse signals with preset frequencies, and for each intercepted low-voltage pulse signal, detects whether the frequency of the low-voltage pulse signal matches the preset frequency to obtain the core detection result. In the case where the core detection result indicates a core failure, a fault detection is performed on the multi-core cable to obtain a fault detection result.

[0048] Among them, the signal transmitting end 102 and the signal receiving end 104 can be but are not limited to single-chip microcomputers, various personal computers, laptop computers, smart phones, tablet computers and other devices with data processing capabilities and control capabilities.

[0049] In an exemplary embodiment, as Figure 2 shown, a multi-core cable detection method is provided. Taking the method applied to the Figure 1 signal receiving end 104 in the figure as an example, it includes the following steps (hereinafter simply referred to as S) S100 to S300. Among them:

[0050] S100, intercept multiple low-voltage pulse signals with preset frequencies sent for multiple cores, and the low-voltage pulse signals correspond to the cores one by one.

[0051] In practical applications, considering that the detection scenarios for multi-core cables (secondary cables) mostly occur at construction sites, such as the construction and maintenance of power cables, the detection results are easily affected by interference such as induced voltage and electromagnetic fields at the construction site. To improve the accuracy of the detection results, the detection of multi-core cables is based on low-voltage pulse signals. Specifically, for the interference in the actual detection environment, a specific operating frequency can be set to avoid the noise frequencies generated by other common electrical equipment in the detection environment, thereby reducing interference. Exemplarily, it can be determined through spectrum analysis that within the frequency range where the interference in the detection environment is concentrated. Considering signal attenuation, the detection frequency of the multi-core cable can be set to a frequency lower than the lower limit value of the frequency range of the interference, so as to balance signal transmission and anti-interference. The preset frequency can also be adjusted according to the detection results to optimize the accuracy of the detection results. After setting the frequency, the signal transmitter emits a low-voltage pulse signal of 12V (volts) of the preset frequency to each core (insulated core), and the signal receiver listens for the signal on each core and intercepts multiple low-voltage pulse signals. It can be understood that in other embodiments, the voltage of the low-voltage pulse signal can be other values such as 30V or 50V, and this is not limited to a unique value here.

[0052] S200. For each low-voltage pulse signal, detect whether the frequency of each low-voltage pulse signal matches the preset frequency to obtain the pair-core detection result corresponding to the low-voltage pulse signal.

[0053] Among them, the pair-core detection result can include whether each core is successfully paired.

[0054] In practical applications, for the low-voltage pulse signal sent to each core, it can be that the signal receiver intercepts the low-voltage pulse signal transmitted from the other end of the core through a sensor, amplifies it through an amplifier circuit, and converts the amplified low-voltage pulse signal into a digital signal through analog-to-digital conversion. For the frequency characteristic analysis of the digital signal, methods such as fast Fourier transform and spectrum analysis can be used to analyze the frequency components of the signal and determine whether the frequency of the low-voltage pulse signal matches the frequency of the sent low-voltage pulse signal. If the frequencies match, it is determined that the core is successfully paired; otherwise, the pairing fails, and the pair-core detection result is recorded. In other embodiments, after obtaining the pair-core detection result, the pair-core detection result is visually displayed. Specifically, the pair-core detection result is sent to the display component of the signal transmitter to display the pair-core detection result.

[0055] S300. In the case where the pair-core detection result indicates pair-core failure, based on the low-voltage pulse signal, perform fault detection on the multi-core cable to obtain the fault detection result.

[0056] Among them, the fault detection result can include the fault type.

[0057] In practical applications, it can be for the common causes leading to core pair failure. According to the fault detection standard specifications, corresponding fault detection strategies are pre-designed. In the case where the core pair detection result indicates core pair failure, the preset fault detection strategy is adopted for fault detection to determine the fault cause of the wire core. In other embodiments, after obtaining the fault detection result, the fault detection result is visually displayed. Specifically, the fault detection result is sent to the display component of the signal transmitter to display the fault detection result.

[0058] In the above multi-core cable detection method, on the one hand, different from the traditional manual core pair detection method, through the automated core pair detection method, the possibility of misjudgment in manual detection is reduced, and the accuracy and efficiency of core pair detection are improved. On the other hand, by setting detection signals of a specific frequency and transmitting low-voltage pulse signals of a preset frequency to multiple wire cores of the multi-core cable, it is beneficial to reduce the interference of the detection site environment and improve the reliability of core pair detection. Thus, for each low-voltage pulse signal, it is detected whether the frequency of the low-voltage pulse signal matches the preset frequency. In this way, core pair detection is performed based on the signal frequency analysis method to obtain the core pair detection result, further improving the accuracy of core pair detection, which is beneficial to judging whether the wire core connection of the cable meets the standard based on the core pair detection result, and further beneficial to reducing the possibility of cable system failures or damages caused by incorrect wiring or missed connections of multi-core cables, and improving the safety and reliability of system operation. On the other hand, the integrated fault detection function automatically performs fault detection in the case where the core pair detection result indicates core pair failure to obtain the fault detection result, which is beneficial to timely reminding the operation and maintenance personnel to take corresponding maintenance measures and improving the maintenance efficiency.

[0059] In the case where the core pair result indicates core pair failure, in an exemplary embodiment, intercepting the multiple low-voltage pulse signals of preset frequencies sent to multiple wire cores includes:

[0060] For each wire core, determine whether the low-voltage pulse signal corresponding to the wire core is intercepted.

[0061] In practical applications, for each wire core, the signal receiving end performs signal monitoring to determine whether the low-voltage pulse signal emitted for the wire core is intercepted.

[0062] Based on the low-voltage pulse signal, fault detection is performed on the multi-core cable, and obtaining the fault detection result includes S310. Among them:

[0063] S310, if the low-voltage pulse signal corresponding to the wire core is not detected within the preset detection time, it is determined that the fault type of the wire core is an open circuit fault.

[0064] In practical applications, the detection time of a fault (such as 5 seconds) can be preset according to the length of the cable to be detected, the detection performance of the signal receiving end, etc. After the signal transmitting end emits a low-voltage pulse signal, if there is no open circuit fault in the core wire, the signal receiving end intercepts the low-voltage pulse signal on the core wire within the predicted detection time. If the corresponding low-voltage pulse signal is not intercepted within the preset detection time, it is determined that there is an open circuit in the core wire.

[0065] In this embodiment, when the core detection result indicates a core failure, the open circuit fault detection of the core wire is automatically performed to obtain the fault detection result, which is beneficial to timely reminding the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0066] In the case where the core alignment result indicates a core failure, in an exemplary embodiment, based on the low-voltage pulse signal, the multi-core cable is subjected to fault detection, and the obtained fault detection result includes S320. Among them:

[0067] S320, if the intensity and period of the intercepted low-voltage pulse signal do not match the intensity and period of the low-voltage pulse signal with a preset frequency sent for the core wire, it is determined that the fault type of the core wire is an open circuit fault.

[0068] In practical applications, the signal receiving end monitors the signals on each core wire. For each core wire, the intensity and period of the received low-voltage pulse signal can be analyzed through an oscilloscope, considering the relationship between the intensity of the received low-voltage pulse signal and the length of the multi-core cable to be detected. If the intensity and period of the received low-voltage pulse signal do not match the intensity and period of the low-voltage pulse signal with a preset frequency emitted by the signal transmitting end, it is determined that there is an open circuit fault in the core wire.

[0069] In this embodiment, when the core detection result indicates a core failure, the open circuit fault detection of the core wire is automatically performed to obtain the fault detection result, which is beneficial to timely reminding the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0070] In the case where the core alignment result indicates a core failure, in an exemplary embodiment, based on the low-voltage pulse signal, the multi-core cable is subjected to fault detection, and the obtained fault detection result includes S330. Among them:

[0071] S330, for each core wire, if multiple low-voltage pulse signals are intercepted within the preset detection time, it is determined that the fault type of the core wire is a short circuit fault.

[0072] In practical applications, the detection time of a fault can be preset according to the length of the cable to be detected, the detection performance of the signal receiving end, etc. The signal receiving end monitors the signals on each core. For each core, if there is no short - circuit fault on the core, only a low - voltage pulse signal should be monitored on this core within the detection time. Conversely, if a low - voltage pulse signal corresponding to this core and at least one low - voltage pulse signal corresponding to at least one other core other than this core are monitored within the preset detection time, and the low - voltage pulse signals of both match, it is determined that there is a short - circuit fault on this core. Exemplarily, the signal transmitting end emits a low - voltage pulse signal for Core 1. Within the preset detection time, if the signal receiving end detects matching low - voltage pulse signals on both Core 1 and Core 2, it is determined that there is a short - circuit fault between Core 1 and Core 2.

[0073] In this embodiment, when the core - pair detection result indicates a core - pair failure, the line - core short - circuit fault detection is automatically performed to obtain the fault detection result, which is beneficial to timely remind the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0074] In the case where the core - pair result indicates a core - pair failure, in an exemplary embodiment, the multi - core cable includes a metal shielding layer. Based on the low - voltage pulse signal, the fault detection of the multi - core cable is performed, and the obtained fault detection result further includes S342 to S344. Among them:

[0075] S340: For each low - voltage pulse signal, detect whether there is a voltage difference between the core corresponding to the low - voltage pulse signal and the metal shielding layer.

[0076] S344: If there is no voltage difference between the core corresponding to the low - voltage pulse signal and the metal shielding layer, it is determined that the fault type of the core is a ground fault.

[0077] In practical applications, after the signal transmitting end emits a low - voltage pulse signal to the connected core, a low voltage is output on the metal shielding layer. The signal receiving end can measure the voltage between the core corresponding to the intercepted low - voltage pulse signal and the metal shielding layer through a measuring device to determine the voltage difference between the core and the metal shielding layer. If there is no voltage difference (the voltage difference is zero) or the voltage difference between the core and the metal shielding layer is close to zero between the core and the metal shielding layer, it is determined that there is a ground fault on the core. Exemplarily, assuming that when there is no ground fault on the core, the voltage difference between the core and the metal shielding layer is 5V, but the detected voltage difference between the core and the metal shielding layer is almost 0V, it is determined that the fault type of the core is a ground fault.

[0078] In this embodiment, when the core - pair detection result indicates a core - pair failure, the line - core ground - fault detection is automatically performed to obtain the fault detection result, which is beneficial to timely remind the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0079] In the case of core alignment failure in core alignment result characterization, in an exemplary embodiment, the multi-core cable includes a metal shielding layer. Based on the low-voltage pulse signal, fault detection is performed on the multi-core cable, and the obtained fault detection result further includes S350. Wherein:

[0080] S350, for each low-voltage pulse signal, if the voltage signal of the metal shielding layer of the core corresponding to the low-voltage pulse signal is not detected, it is determined that the fault type of the core is cable damage, and the fault detection result is obtained.

[0081] In practical applications, after the signal transmitter emits a low-voltage pulse signal to the connected core, a low voltage is output at the metal shielding layer. If no voltage signal is detected at the metal shielding layer of the core, it is determined that there is an open circuit fault in the metal shielding layer of the core, that is, the fault type of the core is cable damage.

[0082] In this embodiment, in the case of core alignment failure in core alignment detection results, automatic core damage fault detection is performed to obtain the fault detection result, which is beneficial to timely reminding the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0083] In an exemplary embodiment, the low-voltage pulse signals of multiple preset frequencies are respectively low-voltage pulse signals emitted in sequence according to the serial numbers of the cores of the multi-core cable. As Figure 3 shown, after obtaining the fault detection result, the multi-core cable detection method further includes S400. Wherein:

[0084] S400, in the case where the fault detection result indicates that the core corresponding to the low-voltage pulse signal has a fault, based on the received serial number of the low-voltage pulse signal, determine the serial number of the core where the fault occurs.

[0085] In practical applications, the signal transmitter sequentially emits low-voltage pulse signals of preset frequencies to the cores according to the serial numbers of the cores of the multi-core cable, that is, the serial number of the core corresponds one-to-one with the order of signal transmission. When the signal receiver indicates that the core corresponding to the intercepted low-voltage pulse signal has a fault in the fault detection result, it can determine the serial number of the core where the fault occurs according to the intercepted serial number (received serial number) of the low-voltage pulse signal, realizing fault location. Exemplarily, in core open circuit fault detection, determine the serial number of the core with an open circuit fault according to the serial number of the monitored core and the received serial number of the low-voltage pulse signal; in core short circuit fault, determine the serial numbers of the cores involved in the short circuit fault according to the received serial number of the low-voltage pulse signal and the serial number of the core where the short circuit fault is detected; in core grounding fault detection, in the case where a grounding fault of the core is detected, it can be determined the serial number of the faulty core according to the received serial number of the low-voltage pulse signal and the serial number of the core with the grounding fault.

[0086] In this embodiment, in the case of detecting a fault, locating the faulty core according to the signal transmission order is beneficial to timely remind the operation and maintenance personnel to take corresponding maintenance measures and improve the maintenance efficiency.

[0087] To make a clearer description of the multi-core cable detection method provided in this application, a specific embodiment is described below. The specific embodiment includes the following steps:

[0088] S1. Intercept multiple low-voltage pulse signals with multiple preset frequencies sent to multiple cores. The low-voltage pulse signals correspond to the cores one by one, and the multiple low-voltage pulse signals with multiple preset frequencies are respectively low-voltage pulse signals transmitted in sequence according to the serial numbers of the cores of the multi-core cable.

[0089] S2. For each low-voltage pulse signal, detect whether the frequency of each low-voltage pulse signal matches the preset frequency to obtain the core detection result.

[0090] S3. For each core, determine whether the low-voltage pulse signal corresponding to the core is intercepted. In the case where the core detection result indicates a core mismatch, if the low-voltage pulse signal corresponding to the core is not detected within the preset detection time, it is determined that the fault type of the core is an open-circuit fault.

[0091] S4. In the case where the core detection result indicates a core mismatch, if the intensity and period of the intercepted low-voltage pulse signal do not match the intensity and period of the low-voltage pulse signal with the preset frequency sent to the core, it is determined that the fault type of the core is an open-circuit fault.

[0092] S5. In the case where the core detection result indicates a core mismatch, for each core, if multiple low-voltage pulse signals are intercepted within the preset detection time, it is determined that the fault type of the core is a short-circuit fault.

[0093] S6. In the case where the core detection result indicates a core mismatch, for each low-voltage pulse signal, detect whether there is a voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer. If there is no voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer, it is determined that the fault type of the core is a ground fault.

[0094] S7. For each low-voltage pulse signal, if the voltage signal of the metal shielding layer of the core corresponding to the low-voltage pulse signal is not detected, it is determined that the fault type of the core is cable damage.

[0095] S8. In the case where the fault detection result indicates that the core corresponding to the low-voltage pulse signal is faulty, based on the reception serial number of the low-voltage pulse signal, determine the serial number of the faulty core.

[0096] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0097] In an exemplary embodiment, as Figure 1 shown, a multi-core cable detection system is provided, including a multi-core cable to be detected, a signal transmitting end 102, and a signal receiving end 104. The signal transmitting end 102 and the signal receiving end 104 are respectively connected to the cores and the metal shielding layer at both ends of the multi-core cable to be detected. Among them:

[0098] The signal transmitting end 102 is configured to: sequentially transmit low-voltage pulse signals with preset frequencies according to the serial numbers of the cores of the multi-core cable to be detected.

[0099] The signal receiving end 104 is configured to: intercept multiple low-voltage pulse signals with preset frequencies transmitted by the signal transmitting end 102, analyze the frequency characteristics of each low-voltage pulse signal, detect whether the frequency of each low-voltage pulse signal matches the preset frequency, obtain the core detection result, and in the case where the core detection result indicates a core failure, perform a fault detection on the multi-core cable to obtain a fault detection result.

[0100] In practical applications, the structures of the signal transmitting end 102 and the signal receiving end 104 (hereinafter, the signal transmitting end and the signal receiving end are simply referred to as detectors) are as Figure 4 shown. The detector includes a metal core slot 1, a grounding clip 2, a liquid crystal display screen 3, a switch / operation button 4, a soft rubber grip 5, and a battery cover 6.

[0101] Among them, a plurality of ( Figure 4 16 in the figure) metal core slots 1 are provided on one side of the detector for accessing the cores of the multi-core cable. The core numbers are marked on the metal core slots (not shown in the figure). The grounding clip 2 is provided at the top of the detector for connecting the metal shielding layer of the multi-core cable. The liquid crystal display screen 3 is provided on the front of the detector for displaying the core detection result / fault detection result. The switch / operation button 4 is provided below the liquid crystal display screen 3 for turning on / off the detection mode of the multi-core cable. The battery of the detector is configured with four No. 5 batteries.

[0102] Programming is carried out using a single-chip microcomputer to achieve the following functional characteristics:

[0103] (1) Two working modes, namely core detection and fault detection, are designed respectively.

[0104] (2) During core alignment, the devices on both sides can automatically distinguish the signal transmitter and the signal receiver through button operations, improving the versatility of multi-core cable detection.

[0105] (3) When the core alignment fails, it directly switches to the fault detection mode, which is beneficial to improving the efficiency of core alignment detection.

[0106] Thus, through the single-chip microcomputer and the liquid crystal display component, the structure of the multi-core cable detection device becomes more compact, the functions become more intelligent and perfect, the detection device is miniaturized and portable, which is beneficial to improving the detection efficiency and the adaptability to complex detection environments. Integrating the two major functions of cable core alignment and fault detection to provide an integrated operation experience, making the detection operation simple and easy to start, and improving the detection efficiency. The core alignment detection results and the information of the cores involved in the fault detection results are displayed through the display component to achieve core alignment and fault location. The master and slave machines (the signal transmitter is the master machine and the signal receiver is the slave machine) are intelligently paired, simplifying device management and improving device utilization and maintainability.

[0107] Before performing multi-core cable detection, the cores at both ends of the multi-core cable to be detected are respectively connected to the metal core slots on the signal transmitter 102 and the signal receiver 104, and the signal transmitter 102 and the signal receiver 104 are respectively connected to the metal shielding layer of the multi-core cable, as Figure 5 shown. The multi-core cable detection process of the multi-core cable detection system is as Figure 6 shown. Specifically, before detection, the signal receiver and the signal transmitter perform device self-checks and enter the standby mode. When it is detected that the core alignment button is pressed, the signal receiver and the signal transmitter synchronize signals, automatically distinguish whether their own devices belong to the signal receiver or the signal transmitter, and switch to the corresponding working mode to enter the core alignment detection. When the signal receiver detects successful core alignment, the core alignment detection results are displayed. On the contrary, when the signal receiver detects failed core alignment, it switches to the fault detection mode and synchronizes signals with the signal receiver to make it enter the fault detection mode. Fault detection is carried out through low-voltage pulse signals, and the signal receiver obtains the fault detection results. When the fault detection results indicate that there is a fault in the core, the fault detection results are displayed.

[0108] In this embodiment, different from the traditional method of manually detecting core alignment, the automatic core alignment detection method of the multi-core cable detection system reduces the possibility of misjudgment in manual detection and improves the accuracy and efficiency of core alignment detection. On the other hand, by the signal transmitting end transmitting low-voltage pulse signals with a preset frequency to multiple cores of the multi-core cable, it is beneficial to reduce the interference of the detection site environment. Thus, the signal receiving end performs core alignment detection based on the signal frequency analysis method to obtain the core alignment detection result, further improving the accuracy of core alignment detection, which is beneficial to judging whether the core connection of the cable meets the standard based on the core alignment detection result, and further beneficial to reducing the possibility of cable system failures or damages caused by incorrect wiring or missed connection of multi-core cables, and improving the safety and reliability of system operation.

[0109] In an exemplary embodiment, as Figure 7 shown, a multi-core cable detection device 600 is provided, including: a signal interception module 610, a core alignment detection module 620, and a fault detection module 630, where:

[0110] The signal interception module 610 is configured to intercept low-voltage pulse signals with multiple preset frequencies sent to multiple cores, and the low-voltage pulse signals correspond to the cores one by one;

[0111] The core alignment detection module 620 is configured to detect whether the frequency of each low-voltage pulse signal matches the preset frequency for each low-voltage pulse signal to obtain the core alignment detection result;

[0112] The fault detection module 630 is configured to perform fault detection on the multi-core cable based on the low-voltage pulse signal when the core alignment detection result indicates a core alignment failure to obtain the fault detection result.

[0113] In an exemplary embodiment, the signal interception module 610 is further configured to determine whether the low-voltage pulse signal corresponding to the core is intercepted for each core;

[0114] The fault detection module 630 is further configured to determine that the fault type of the core is an open circuit fault if the low-voltage pulse signal corresponding to the core is not detected within a preset detection time.

[0115] In an exemplary embodiment, the fault detection module 630 is further configured to determine that the fault type of the core is an open circuit fault if the intensity and period of the intercepted low-voltage pulse signal do not match the intensity and period of the low-voltage pulse signal with the preset frequency sent to the core.

[0116] In an exemplary embodiment, the fault detection module 630 is further configured to determine that the fault type of the core is a short circuit fault for each core if multiple low-voltage pulse signals are intercepted within a preset detection time.

[0117] In an exemplary embodiment, the fault detection module 630 is further configured to, for each low-voltage pulse signal, detect whether there is a voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer. If there is no voltage difference between the core corresponding to the low-voltage pulse signal and the metal shielding layer, the fault type of the core is determined to be a ground fault.

[0118] In an exemplary embodiment, the fault detection module 630 is further configured to, for each low-voltage pulse signal, if the voltage signal of the metal shielding layer of the core corresponding to the low-voltage pulse signal is not detected, determine that the fault type of the core is a cable damage.

[0119] In an exemplary embodiment, the multi-core cable detection device 600 further includes a display module 640, configured to display the core detection result and / or the fault detection result.

[0120] In an exemplary embodiment, the multi-core cable detection device 600 further includes a fault location module 650, configured to, when the fault detection result indicates that the core corresponding to the low-voltage pulse signal has a fault, determine the serial number of the faulty core based on the received serial number of the low-voltage pulse signal.

[0121] Each module in the above multi-core cable detection device 600 can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0122] In an exemplary embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 8 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, a multi-core cable detection method is implemented.

[0123] Those skilled in the art can understand,Figure 8 The structure shown is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0124] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in any one of the above-mentioned multi-core cable detection method embodiments are implemented.

[0125] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in any one of the above-mentioned multi-core cable detection method embodiments are implemented.

[0126] In an embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in any one of the above-mentioned multi-core cable detection method embodiments are implemented.

[0127] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0128] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include Read-Only Memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, Resistive Random Access Memory (ReRAM), Magnetoresistive Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene memory, etc. Volatile memory can include Random Access Memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, Artificial Intelligence (AI) processors, etc., without limitation.

[0129] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in the present application.

[0130] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A multi-core cable detection method, characterized in that: The method comprises: Intercepting a plurality of low-voltage pulse signals of preset frequencies sent to a plurality of line cores, wherein the low-voltage pulse signals correspond one to one with the line cores; For each of the low-voltage pulse signals, detecting whether the frequency of the low-voltage pulse signal matches the preset frequency, and obtaining a core detection result corresponding to the low-voltage pulse signal; In the case that the core alignment detection result indicates a core alignment failure, a fault detection is performed on the wire core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result.

2. The method according to claim 1, characterized in that The method of intercepting a plurality of low-voltage pulse signals of preset frequencies sent to a plurality of line cores comprises: For each line core, determining whether a low-voltage pulse signal corresponding to the line core is intercepted; The method of performing fault detection on a wire core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result includes: If the low-voltage pulse signal corresponding to the line core is not intercepted within the preset detection time, it is determined that the fault type of the line core is a circuit breaker fault.

3. The method according to claim 2, characterized in that The method of performing fault detection on the line core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result further includes: If the strength and period of the intercepted low-voltage pulse signal do not match the strength and period of the low-voltage pulse signal of a preset frequency sent to the core, the fault type of the core is determined to be a circuit breaker fault.

4. The method according to claim 1, characterized in that: The method of performing fault detection on the line core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result further includes: For each of the line cores, if a plurality of low-voltage pulse signals are intercepted within a preset detection time, it is determined that the fault type of the line core is a short circuit fault.

5. The method according to claim 1, characterized in that The multi-core cable includes a metal shielding layer; based on the low-voltage pulse signal, the fault detection is performed on the wire core corresponding to the low-voltage pulse signal to obtain a fault detection result, and further includes: For each of the low-voltage pulse signals, detecting whether there is a voltage difference between the wire core corresponding to the low-voltage pulse signal and the metal shielding layer; If there is no voltage difference between the wire core corresponding to the low-voltage pulse signal and the metal shielding layer, it is determined that the fault type of the wire core is a ground fault.

6. The method according to claim 5, characterized in that The method of performing fault detection on the line core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result further includes: For each of the low-voltage pulse signals, if the voltage signal of the metal shielding layer of the wire core corresponding to the low-voltage pulse signal is not detected, it is determined that the fault type of the wire core is cable damage.

7. The method according to any one of claims 1 to 6, characterized in that: The multiple low-voltage pulse signals of preset frequencies are low-voltage pulse signals emitted in sequence according to the serial numbers of the cores of the multi-core cable; After obtaining the fault detection result, the method further includes: When the fault detection result indicates that a fault exists in the wire core corresponding to the low-voltage pulse signal, the serial number of the faulty wire core is determined based on the received serial number of the low-voltage pulse signal.

8. A multi-core cable detection system, characterized in that: The system comprises: a multi-core cable to be detected, a signal transmitting end and a signal receiving end, wherein the signal transmitting end and the signal receiving end are respectively connected to the wire cores and metal shielding layers at both ends of the multi-core cable to be detected; The signal transmitting end is configured to: sequentially transmit low-voltage pulse signals of a preset frequency according to the serial numbers of the cores of the multi-core cable to be detected; The signal receiving end is configured to: adopt the multi-core cable detection method as described in any one of claims 1 to 7, detect whether the frequency of each of the low-voltage pulse signals matches the preset frequency, and obtain the core detection result; when the core detection result indicates a core alignment failure, perform fault detection on the multi-core cable to obtain a fault detection result.

9. A multi-core cable detection device, characterized in that: The device comprises: A signal interception module, used to intercept a plurality of low-voltage pulse signals of preset frequencies sent to a plurality of line cores, wherein the low-voltage pulse signals correspond to the line cores one by one; A core detection module, used for detecting, for each low-voltage pulse signal, whether the frequency of each low-voltage pulse signal matches the preset frequency, and obtaining a core detection result corresponding to the low-voltage pulse signal; The fault detection module is used to perform fault detection on the wire core corresponding to the low-voltage pulse signal based on the low-voltage pulse signal to obtain a fault detection result when the core alignment detection result indicates a core alignment failure.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

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