164 results about "Cable fault location" patented technology

The invention relates to the technical field of cable asset management and fault prediction, and discloses a cable fault positioning method based on deep learning clustering analysis test waveform characteristics, and the method comprises the steps: collecting waveform and environment data in a cable operation period, and constructing a historical feature library comprising waveform, environment and position features; a self-adaptive detection model is adopted, and parameters are dynamically adjusted to adapt to different working conditions; multi-dimensional feature fusion and matching analysis are combined; a fault point distance is calculated through a signal propagation model and a time difference positioning algorithm, precise positioning is realized by fusing environment compensation and multi-point cross validation, and a three-dimensional geographic coordinate is generated by combining a laying path; and after multiple verifications, a structured report containing a fault type, a risk level, a prediction position, confidence and operation and maintenance suggestions is generated. According to the system, intelligent monitoring, fault risk prediction, asset optimization management and operation and maintenance decision support of a cable operation state are realized, and scientificity and economy of cable management in a complex environment are improved.

The invention relates to the field of cable fault detection, in particular to a distribution cable fault positioning method based on electric signal analysis, which comprises the following steps of: determining a cable analysis state of each abnormal response point according to an interval monitoring execution index; determining whether to perform initial interference analysis or execute evaluation analysis according to the cable analysis state of the abnormal response point location; when initial interference analysis is carried out, whether interference compensation processing and range optimization processing are carried out on each abnormal response point location or not is determined according to the reference feature matching index; determining whether to perform channel filtering or not according to the interference effect evaluation index, and determining whether to perform compensation acquisition processing on each cable monitoring interval or not according to the interference compensation coefficient; and when the execution evaluation analysis is carried out, determining whether to carry out redundancy distribution prompt for each abnormal response point location according to the execution redundancy parameters. According to the method, the cable fault positioning efficiency is guaranteed, and meanwhile, the requirement for monitoring point arrangement is lowered.

The invention provides an optical cable fault positioning method based on OTDR signal characteristic adaptive denoising and event identification, and the method comprises the steps: classifying modal components after OTDR signal adaptive noise decomposition based on a preset entropy threshold value, and obtaining a noise dominant component, a mixed component and a signal dominant component; singular value difference spectrum abrupt change point detection is carried out on the noise dominant component, and residual useful signals are extracted; verifying the entropy value of the mixed component, and reconstructing the component meeting the entropy threshold value, the signal dominant component and the residual useful signal into a de-noised signal; synchronously optimizing hyper-parameters and feature selection subsets of the support vector machine by adopting a swarm intelligence algorithm, wherein search parameters of the algorithm are dynamically updated according to an exponential decay mechanism; and outputting fault point space position information based on the optimized support vector machine model.

The invention relates to the technical field of cable fault positioning, in particular to a cable fault accurate positioning method based on multi-channel synchronous acquisition, which comprises the following steps: S1, constructing a multi-channel adaptive acquisition system which comprises a main controller, a multi-channel acquisition module, a synchronous control module and a data transmission module; s2, multi-channel data synchronous acquisition is carried out through the synchronous control module, wherein the multi-channel data comprises impedance data, temperature data, partial discharge signals and insulation resistance data; during use, through a multi-channel adaptive acquisition design, monitoring channels can be flexibly selected according to cable materials, operation years and environmental conditions, different aging fault characteristics are comprehensively covered, the fault omission ratio and the false alarm rate are reduced, different types of low-voltage cables are adapted, a synchronous scheme of constant-temperature crystal oscillator and hardware triggering is adopted, and the reliability of the system is improved. The method does not need to depend on a GPS / PTP time service module, is favorable for saving cost input, and eliminates environmental interference and single parameter false triggering.

The invention provides a fault signal detection system and an analysis positioning method, and relates to the technical field of signal detection. An injection module is used for periodically applying narrowband acoustic disturbance capable of adaptively selecting frequency and power to an optical cable sheath; the passive wireless label nodes arranged along the line collect multi-dimensional data such as arrival timestamps, amplitudes, frequencies, phases, local temperatures and the like in real time, and upload the data through near-field coupling. And the convergence module completes node identification association and batch aggregation, the analysis and construction module constructs an acoustic propagation path map, and after temperature difference segmentation compensation, an actual laying path is dynamically recovered by adopting a map search algorithm. And the projection and identification module maps the map to a geographic information system coordinate system and outputs a fault space position, thereby realizing real-time and accurate optical cable fault positioning under a topology-free prior condition, remarkably reducing manual inspection and misjudgment rates, and being suitable for a multi-branch and multi-repair long-distance communication or power optical cable scene.

The invention is suitable for the technical field of fault distance measurement, and provides a power distribution network fault distance measurement method and system based on fault point voltage transient waveform comparison, and the method comprises the steps: collecting three-phase voltage and current signals at two ends of a line when a power distribution network fault occurs, and extracting a transient component signal in a preset frequency range; performing phase-mode transformation decoupling processing on the transient component signal; constructing a transient voltage differential equation from the two ends of the line to a hypothetical fault point, dynamically adjusting the fault position hypothetical point in a preset distance measurement interval by adopting a dichotomy, and calculating a transient voltage calculation waveform from the two ends of the line to the fault position hypothetical point; performing time domain similarity analysis on the transient voltage calculation waveform, and calculating a waveform consistency index; judging whether a preset convergence condition is met or not; if yes, determining that the current fault position hypothesis point is a target fault point; otherwise, adjusting the dichotomy interval according to the waveform comparison difference direction, and carrying out the next round of iterative calculation until the convergence condition is met, thereby effectively improving the fault distance measurement accuracy.

The invention relates to the field of electrical system fault detection, and provides a cable fault positioning method and system based on neural network learning. The method comprises the following steps: acquiring a cable traveling wave signal and preprocessing the cable traveling wave signal to obtain a preprocessed traveling wave signal; performing high-speed parallel acquisition on the preprocessed traveling wave signal to obtain multi-channel digital traveling wave data; performing multi-resolution decomposition on the multi-channel digital traveling wave data through a fast wavelet transform algorithm, and performing feature extraction on a wavelet coefficient obtained through decomposition to obtain a fault feature vector; and carrying out classification identification on the fault feature vector through a multilayer perceptron neural network, and carrying out fault position calculation on a classification result to obtain a fault positioning result. According to the invention, the cable fault positioning precision and reliability are improved.

The application discloses a submarine cable path detection device and method and a cable fault positioning method, and the detection device comprises a detection ship, a general control module, a rudder control module, a positioning and information transmission system, a cable path detection assembly, a fault detection assembly and a land centralized control center. The application applies low-frequency voltage to the fault of the submarine cable, so that an alternating magnetic field is generated in the sea area around the cable, and the trend of the submarine cable is detected and judged, the technical defects that the submarine cable is inconvenient to maintain when the actual line deviates from the original laid line are overcome, time is saved, and efficiency is improved. The cable fault positioning method of the application quickly positions the fault point, overcomes the problems that the previous determination of the submarine cable fault point is time-consuming and labor-consuming, and the positioning accuracy of the fault point is not high, and improves the positioning accuracy and efficiency of the fault point.

The invention discloses a power cable outer sheath fault positioning method, and belongs to the technical field of cable fault positioning. Aiming at the problems of poor adaptability, weak anti-interference capability and low positioning precision of the existing cable outer sheath fault positioning technology, the method comprises the following steps of: acquiring horizontal and vertical components of an electromagnetic signal by deploying an array sensor, and obtaining pure vector distribution through Fourier transform and wavelet denoising processing; judging coordinates of an abnormal point according to an amplitude threshold value and a phase ratio, and determining a fault cluster center by adopting K-means clustering; and fusing the environmental data, refining the position through iterative filtering, comparing and confirming a final fault point in combination with triangulation and historical data, and generating a vector distribution map and a diagnosis report. According to the invention, high-precision and anti-interference positioning and visual diagnosis of cable faults in a complex environment are realized.

The invention provides a magnetic field traveling wave signal processing method for cable fault detection and related equipment, and relates to the technical field of cable fault detection, and the method comprises the steps: configuring a distributed sensor according to an identified key position of a cable, and collecting a magnetic field traveling wave signal of the cable through the distributed sensor, and obtaining a time sequence signal data set; performing preprocessing and signal enhancement on the time sequence signal data set in sequence, and inputting signal features of the time sequence signal data set after signal enhancement into a pre-optimized fault identification model to obtain a fault positioning result of the cable; wherein the fault identification model is obtained by performing model parameter optimization by adopting a pre-established multi-objective function based on a particle swarm and a preset particle search strategy, and the particle search strategy is set according to a preset speed updating mechanism and a current noise interference state. Therefore, the method effectively enhances the accuracy and practicability of the fault detection system while improving the quality of the cable fault signal.

According to the cable fault positioning system based on multi-detection node data fusion, integration of early warning and accurate positioning of cable faults is achieved through multi-node cooperative monitoring and data fusion, a partial discharge feature recognition and pulse reflection joint detection mechanism is adopted, a signal propagation speed compensation model and a multi-source data optimization algorithm are combined, and the cable fault positioning accuracy is improved. The limitation of a single detection node is effectively overcome, the accuracy and reliability of fault positioning are remarkably improved, and the fault finding time and the power failure loss are reduced.

The invention discloses a graphical fault distance measurement method and system, relates to the field of traction substation tripping fault mark distance measurement in the railway industry, and can read a fault report of a fault distance measurement device and constant value parameter configuration of the fault distance measurement device off line, and calculate and analyze a fault type, whether line current is balanced or not and a fault distance according to the data and parameters. And a result is graphically displayed, so that the distance measurement error range can be narrowed by modifying and verifying the constant value parameters, and the corrected constant value parameters are exported and stored, thereby achieving the purposes of facilitating fault analysis, improving the working efficiency and shortening the maintenance time. Maintenance personnel are helped to quickly find out fault points, timely process faults and recover normal operation of lines, and the method is very important for safe, reliable and efficient transportation of a railway system.

The application relates to a positioning method of a cable fault positioning device based on electromagnetic method, which comprises the following steps: step S1: detecting a metal pipeline through a magnetic field to obtain a cable path; step S2: obtaining electrical characteristic data of each cable joint, and judging which two joints the fault occurs between based on historical data of each cable joint; and step S3: obtaining fault characteristic data to position the fault according to the two joints obtained in step S2. In an offline state, the application can position the position of a fault cable joint by observing characteristic values of the joint through an equal proportionally reduced voltage and current signal, so that the fault point can be further given in detail.

The application discloses a kind of wide frequency impedance spectrum cable fault location methods based on end function compensation, comprising: according to the equivalent model of micro-unit of healthy coaxial cable, the voltage current partial differential equation set of healthy coaxial cable is determined, and its general solution is calculated;According to general solution, the reflection coefficient of healthy coaxial cable load end is calculated, and according to the reflection coefficient and general solution, the impedance spectrum of healthy coaxial cable about frequency is calculated;The impedance spectrum about frequency of measured cable is measured, and difference comparison is carried out with the impedance spectrum of healthy coaxial cable, to determine whether the measured cable exists fault;According to phase spectrum, construct orthogonal integral function, introduce gauss filter to eliminate the interference of local big fault, and extract the extreme value and maximum value of function, form compensation function;Establish fault diagnosis function based on impedance phase spectrum, determine the local fault position and local soft fault type of measured cable, realize accurate positioning of different fault positions, and greatly improve the detection and positioning precision for traditional method.

The application discloses a power distribution network phase-to-phase short-circuit fault distance measurement method, equipment and medium, wherein the method comprises the following steps: sampling and acquiring each-phase voltage at the head of a protection section, and judging whether the starting criterion is met according to the acquired voltage; if yes, starting the fault distance measurement method, and the distributed power supply injects a high-frequency current detection signal into the line; sampling and acquiring three-phase voltage and current of one power frequency cycle before and after the fault at the head of the protection section; extracting power frequency component and high-order harmonic component of each-phase voltage and current by using a fast Fourier algorithm, and calculating the power frequency fault component; judging the fault type and the fault phase by using the difference between the power frequency current fault components of each two phases; obtaining the fault distance measurement equation according to the fault type, solving the fault distance measurement equation, and obtaining the fault distance. The application solves the problem of the fault distance measurement of the power distribution network phase-to-phase short-circuit fault containing the distributed power supply, and does not need to additionally install a signal injection device. The application can be widely applied in the field of power distribution network fault positioning.

The present invention discloses a method, device, and non-volatile storage medium for locating optical cable faults. The method comprises: upon detecting a fault in an optical cable, determining the fault distance of the fault point in the optical cable, where the fault distance is the distance between the detection point and the fault point; and determining target location information corresponding to the fault point based on the fault distance and a preset optical cable location model. The present invention addresses the technical problem in related technologies of inaccurately locating fault points in optical cables, resulting in significant maintenance costs and inefficiencies.

The utility model discloses an urban planning underground comprehensive pipe gallery which comprises a pipe gallery body, and multiple layers of cable supporting assemblies are installed on installation base plates on the two sides in a combined mode. The beneficial effects of the utility model are that the supporting seat of the cable supporting assembly is in sliding fit with the U-shaped clamping seat, and the limiting rod is in longitudinal sliding fit with the limiting hole, so that the supporting seat can be detachably and transversely combined at the side position of the pipe gallery body; meanwhile, after the limiting rods are longitudinally separated from the limiting holes, the supporting seats can vertically slide downwards and be separated from the U-shaped clamping seats, so that the supporting seats can be detached from the side positions of the pipe gallery body, and the combination and detachment modes of the supporting seats on the side positions of the pipe gallery body are simple and easy to achieve; the supporting seat can be conveniently and rapidly combined on the side portion of the pipe gallery body to carry and support the cable, meanwhile, the fault position of the cable can be smoothly exposed after the supporting seat is conveniently and rapidly detached from the lower portion of the cable subsequently, and the cable can be conveniently overhauled and maintained.

The application discloses a fault distance measurement method and system based on synchronous sampling of power distribution terminals, relates to the related technical field of fault distance measurement, and comprises the following steps: acquiring transient electrical quantity data synchronously sampled by multiple power distribution terminals after a fault of a power system; constructing a dynamic graph structure with the power distribution terminals as nodes and electrical connection relationships as edges according to real-time network topology information, inputting the transient electrical quantity data into a phase sequence disorder correction model to correct phase sequence disorder and extract spatial fault features; fusing zero-mode components of the transient electrical quantity data and node enhanced features; globally aggregating the fusion features of the nodes to obtain graph-level fusion features, extracting timing features, and regressing to obtain a fault distance. The application solves the technical problem that, in the prior art, it is difficult to fully utilize multi-source transient information to perform high-precision fault distance measurement in a complex power distribution network environment with dynamic topology and phase sequence disorder, and achieves the technical effects of improving fault distance measurement precision and adaptability to complex power distribution network environments.

The invention discloses a power distribution network fault accurate positioning method based on negative-sequence component characteristics and two-end quantities, and the method comprises the steps: collecting fault voltage and current information, and extracting voltage and current fundamental frequency components; performing phase-mode transformation on the fundamental frequency phasors of the three-phase voltage and the three-phase current to obtain negative-sequence components of the voltage and the current; the amplitudes of the current negative-sequence components at the outlets of all the lines are extracted and compared, and the line with the maximum current negative-sequence component amplitude at the outlet is judged as a fault line; establishing head-end quantity and tail-end quantity expressions of the negative-sequence voltage amplitude of the fault point; and solving and judging a fault point distance by using a simultaneous equation set of fault point negative sequence voltage amplitude expressions established by the head-end quantity and the tail-end quantity. According to the method, only the negative-sequence parameters at the two ends of the line and the negative-sequence impedance parameters of the fault line are needed, the cost is low, the practicability is good, a new thought is provided in the aspect of fault distance measurement, and technical support can be provided for reducing the manual line patrol range on site and improving the fault maintenance efficiency.

The present invention discloses a real-time monitoring system for cable fault location. The system includes a data acquisition unit, a data storage unit, a data processing unit, a positioning unit, an alarm unit and a display terminal. The data acquisition unit constructs a monitoring interval according to a number of monitoring nodes of each cable. The monitoring interval is configured with a corresponding acquisition line based on the number and position relationship of the monitoring nodes on each cable and the correlation relationship between two adjacent monitoring nodes. The acquisition line obtains the waveform signal, current signal and position information of each monitoring node according to the correlation relationship between two adjacent monitoring nodes. When a cable fails, the system sends the fault information and the corresponding position information to the display terminal to facilitate remote monitoring of the cables in the monitoring interval and accurately maintain the cables according to the monitored fault position information. There is no need for operating personnel to conduct an overall inspection of the cables, which is convenient for operation, saves time and effort, and greatly improves work efficiency.

The invention discloses a fault distance measurement method and system based on power distribution terminal synchronous sampling, and relates to the technical field of fault distance measurement, and the method comprises the steps: obtaining the transient electrical quantity data of a plurality of power distribution terminals synchronously sampled after a power system has a fault; according to the real-time network topology information, a dynamic graph structure with the power distribution terminal as a node and the electrical connection relation as an edge is constructed, transient electrical quantity data is input into a phase sequence disorder correction model to correct phase sequence disorder, and space fault features are extracted; extracting a zero-mode component of the transient electrical quantity data and performing node enhancement feature fusion; globally aggregating the fusion features of the nodes to obtain graph-level fusion features, and extracting time sequence features and performing regression to obtain a fault distance. The technical problem that in the prior art, it is difficult to fully utilize multi-source transient information to conduct high-precision fault distance measurement in the complex power distribution network environment with topology dynamic change and phase sequence disorder is solved, and the technical effect of improving the fault distance measurement precision and the adaptability to the complex power distribution network environment is achieved.

The application discloses a fault ranging method in a 1-2 mode of a traction power supply system feeder breaker, relates to the technical field of electrified railway traction power supply, and converts the uplink and downlink feeder currents of a traction substation by means of the cross-link current of an AT substation and a partition substation, so that the first fault interval from the traction substation to the AT substation can also be subjected to fault ranging by the fault ranging principle of the cross-link current ratio method. The method simultaneously considers the difference between type I and type II substation, and the fault ranging precision of the first fault interval can be improved by using the method, the ranging error is controlled within a range of 250 meters, the fault point can be quickly positioned by operation and maintenance personnel when a fault occurs, the fault is timely disposed and the line is recovered to normal operation, and the method has important significance for guaranteeing the safe, stable and efficient operation of a railway transportation system.

The invention discloses a fault location method and system based on adaptive scale wavelets, and the method comprises the steps: carrying out the discretization of a preset wavelet basis, and generating an adaptive scale wavelet library; based on the wavelet of each scale in the wavelet library, single-layer discrete wavelet decomposition is carried out on the independent fault signal, and a high-frequency coefficient corresponding to each scale is extracted; calculating a corresponding energy-entropy comprehensive evaluation index based on the high-frequency coefficient corresponding to each scale; and determining an optimal scale based on the energy-entropy comprehensive evaluation index, and carrying out fault distance measurement and calculation through the optimal scale. According to the fault distance measurement method and system based on the adaptive scale wavelet provided by the technical scheme of the invention, rapid and accurate fault location distance measurement is realized.

The invention relates to the technical field of cable fault positioning, in particular to a cable fault accurate positioning method and system for cable health monitoring, and the method comprises the steps: obtaining a collection reflection section and an experiment reflection section; obtaining the matching degree of the experimental reflection section; other parameters except the noise intensity in the experiment parameter group are constant, and the noise intensity is quantitatively analyzed to obtain the comprehensive matching degree of the collection reflection section and the experiment reflection section; screening the parameter groups to obtain a plurality of matching parameter groups and a reflection initial search range; comprehensively analyzing the probability that the correlation degree of the reflected pulse signal and the matching parameter group reflects each moment as the starting moment, and selecting the starting moment of the reflected pulse signal; and obtaining the distance of the fault point by using the starting time of the reflected pulse signal. The invention aims to solve the interference of noise on the starting moment of the reflected pulse signal and improve the accuracy of the time domain reflection method.

The application discloses a kind of track train cable fault location's travelling wave signal denoising method and system, it is related to track train cable fault detection technical field.Wherein, the method includes: the original travelling wave signal generated by track train cable fault is collected;Wherein, original travelling wave signal includes the incident wave and reflected wave generated by fault point;Original travelling wave signal is preprocessed, removes direct current component, low-frequency noise and irrelevant interference component in signal, obtains the travelling wave signal after preprocessing;The travelling wave signal after preprocessing is input into VMD algorithm of variation modal decomposition, and the intrinsic mode decomposition is carried out to travelling wave signal, obtains multiple intrinsic mode components;Improved particle swarm optimization algorithm IPSO is introduced, and the optimal signal decomposition effect is used as objective function, and the key parameters of VMD algorithm are iteratively optimized, and the optimal parameter combination is obtained.The application solves the problems of insufficient denoising effect, signal waveform distortion and limited noise resistance in the prior art.

The invention belongs to the technical field of aviation cable fault positioning, and particularly relates to a cable fault positioning method based on time-frequency domain analysis, which comprises the following steps: firstly, collecting a cable fault signal, adopting a GWO-VMD algorithm, taking a minimum sample entropy as a fitness function, and optimizing to find an optimal penalty factor and decomposition layer number, so as to obtain a fault positioning result; removing a high noise component obtained by VMD decomposition according to the current sample entropy, and obtaining a reflected signal after noise reduction; performing cross term suppression on the reflected signal after noise reduction by using smooth pseudo Wigner distribution to obtain discrete SPWVD; and performing blind area elimination on the discrete SPWVD based on a blind area elimination algorithm of hypothesis verification to obtain a fault distance. A grey wolf optimization algorithm is applied to a variational mode decomposition algorithm, and parameters of decomposition layers and penalty factors of the VMD are optimized, so that the problem of interference of noise on reflection signal extraction is solved; secondly, the smooth pseudo Wigner distribution is adopted to solve the problem of cross term interference among a plurality of linear components in the traditional WVD distribution, and the positioning precision is improved.

The application discloses a fault distance measurement method and system for an electrified railway AT power supply mode, relates to the technical field of fault distance measurement, determines whether load current is contained in fault current according to impedance angle, and calculates fault current without containing load current; that is, the mixed load current is removed in the fault current calculation process, so that the accuracy of the fault current is ensured; the fault type is judged based on the self-coupling variable absorption current direction characteristics, so that the fault type judgment error caused when the fault occurs at the end section of the traction network is avoided, the fault type identification accuracy is greatly improved, and the fault distance measurement precision is improved.

The present invention discloses a method for collecting and locating traveling wave characteristics of distributed cable faults, which relates to the field of cable fault technology. The method includes collecting traveling wave characteristic information through branch point sensing units and sharing the collected traveling wave characteristic information through a communication network; constructing a dynamic topology perception and network reconstruction framework, wherein weighted averaging includes assigning weights to data sources based on signal-to-noise ratio, topological distance, and time consistency; establishing a propagation path model of traveling wave signals in distributed cables, and using hyperbolic positioning rules in combination with the propagation path model to define the cable fault location coordinates. The present invention enhances the distributed collaboration capability of the system. While improving positioning accuracy, the overall solution has good scalability and adaptability. It can be widely used in fault monitoring and management of large-scale distributed cable networks, effectively reducing troubleshooting time and cost, and providing strong support for the intelligent operation and maintenance of power systems.

The invention relates to the technical field of intelligent operation and maintenance of power equipment, and discloses a distributed photovoltaic cable fault positioning device which comprises a fault positioning instrument body, a shielding shed, a lifting mechanism and a linkage lock. The fault positioning instrument body is composed of two hinged semi-cylindrical shells, and a monitoring circuit is integrated in the fault positioning instrument body. The shielding shed is fixed on the aerial cable through a hoop to serve as a resident base station. The lifting mechanism is arranged in the shielding shed, and a reel and a traction rope are driven by a motor, so that the ground vertical lifting of the fault locator main body is realized. The core innovation lies in mechanical logic control of the lock, wherein a one-way rigid shifting plate mechanism automatically triggers a lock cylinder to retract and unlock when a reel rotates reversely, and automatic locking is achieved through mechanical extrusion and spring reset when a shell ascends in place. The mode that traditional equipment needs to climb a tower for maintenance is thoroughly changed, operation and maintenance personnel can complete equipment overhaul on the ground, and the method has the remarkable advantages that power failure is not needed, intrinsic safety is achieved, and the maintenance cost is extremely low.

The invention discloses a single fault point distance measurement method based on a reflection coefficient spectrum period, and relates to the technical field of fault detection, and the method comprises the specific steps: 1, constructing a model, and building an incidence relation; 2, determining the frequency range and bandwidth of frequency sweeping; 3, collecting data and constructing a smooth interpolation curve; 4, detecting feature points to obtain a phase coefficient value; 5, calculating a period and solving a fault distance; according to the method, the improved reflection coefficient spectrum model integrated with the cable basic parameters is constructed, the correlation between the period and the fault distance is established, interference of a traditional method is avoided, the near-area fault distance measurement problem is solved, and accuracy and adaptability are improved; and meanwhile, data is processed by adopting segmented cubic spline interpolation, fuzzy feature points are eliminated, redundancy check of three cycle calculation modes is designed, the anti-interference capability is enhanced, the fault distance is stably output in signal attenuation and noise interference scenes, and the reliability and consistency of a distance measurement result are guaranteed.