172 results about "Time-domain reflectometer" patented technology

The invention relates to a phase-sensitive optical time domain reflectometer based on multi-frequency reference switching. Continuous laser generated by a continuous laser is divided into a local path and a detection path through an optical coupler; the local path is input to the polarization coherent receiving module, the detection path is incident to a light intensity modulator driven by the signal generation circuit module, and the light intensity modulator is converted into a multi-frequency pulse laser sequence with intensity modulation; the multi-frequency pulse laser sequence enters the sensing optical fiber to be measured through the optical circulator; generated Rayleigh backscattered light and local continuous laser are subjected to beat frequency coherent receiving in a polarization coherent receiving module through a circulator; and the signal acquisition circuit adopts a demodulation algorithm to compensate phase drift and sensitivity difference of detection pulse demodulation signals with different frequencies so as to realize dynamic strain sensing. Compared with the prior art, the phase drift and the sensitivity difference between the frequencies are extracted to realize the compensation of the interleaved signals, and the method does not depend on the fixed reference frequency, so that the robustness and the adaptability of the system in a complex environment are remarkably enhanced.

The invention relates to an electric power communication optical fiber fault monitoring and visualization method and system, and belongs to the technical field of optical fiber communication monitoring, and the method comprises the following steps: carrying out the real-time monitoring of an electric power communication optical fiber through a non-intrusive monitoring system, collecting an optical power signal in real time, and constructing an optical fiber resource database; when the non-intrusive monitoring system detects that optical power attenuation exceeds a preset threshold value, an optical time domain reflectometer OTDR is started to perform intrusive detection on an abnormal optical fiber, and an OTDR echo curve is obtained; extracting a composite feature vector of an OTDR echo curve, and identifying a fault type through a multi-stage fusion algorithm in combination with historical fault record data; according to the OTDR detection point coordinates, the optical path distance and the geographic information data, the position of a fault point is calculated, and the optical fiber topology, the position of the fault point and the fault type of the fault point are displayed in a visual interface. According to the invention, accurate fault identification and quick response are realized, and the operation and maintenance efficiency is improved.

The invention relates to a phase-sensitive optical time domain reflectometer based on a parallel frequency division multiplexing sequence. Continuous laser is divided into a local path and a detection path through an optical coupler; the local path is input to the polarization coherent receiving module, the detection path is converted into a pulse laser sequence with intensity modulation through a light intensity modulator driven by a radio frequency signal provided by the signal generation circuit module, and the radio frequency signal is composed of two frequency division multiplexing sequences with difference; the pulse laser sequence enters the sensing link to be measured to generate Rayleigh backscattered light, and the Rayleigh backscattered light and local continuous laser are subjected to beat frequency coherent receiving through a circulator; and the signal acquisition circuit is used for sampling and analyzing the interference signal, and performing frequency domain comparison on an interleaving result of the two frequency division multiplexing pulse sequences to eliminate a harmonic frequency and retain a real strain signal frequency. Compared with the prior art, the non-harmonic strain signal measurement is realized, the high-frequency response performance and the high-precision strain measurement capability are excellent, and meanwhile, the long-distance coverage capability is also realized.

The invention relates to an optical time domain reflectometer and a control method of the optical time domain reflectometer, and relates to the technical field of photoelectricity. The optical time domain reflectometer OTDR comprises a single photon detector, and the OTDR is used for being connected with an optical fiber to be measured; the OTDR is further used for sending a plurality of detection signals to the optical fiber to be detected in sequence and receiving a plurality of detection echo signals from the optical fiber to be detected in sequence, and the detection echo signals are used for indicating the transmission state of the same section of transmission area in the optical fiber to be detected; performing amplitude reduction processing on each detection echo signal at a certain time interval to obtain a processed detection echo signal; the positions, corresponding to the same section of transmission area, of the signal sections subjected to amplitude reduction processing in the different processed detection echo signals are not completely the same; each processed detection echo signal is subjected to photoelectric conversion based on the single-photon detector to obtain a first electric signal, a first OTDR oscillogram is output based on the multiple first electric signals, and the first OTDR oscillogram is used for indicating the transmission state of the same section of transmission area. Therefore, the problem of OTDR curve distortion can be solved.

The invention relates to the technical field of data processing, and discloses a gateway service integrated management method and system based on an FTTR demand. The method comprises the following steps: carrying out topology scanning on a test signal of an optical time domain reflectometer to obtain a room-level FTTR topology mapping table, carrying out feature extraction on service traffic of each room according to deep packet inspection to obtain a room function identification tag library, and carrying out attenuation compensation on a corresponding room optical port by an optical power meter to obtain an FTTR link quality evaluation matrix, and bandwidth allocation is carried out through a reinforcement learning algorithm to obtain a room-level QoS strategy configuration set, and building data interaction is carried out based on an MQTT protocol to obtain an FTTR gateway service integrated management scheme. According to the invention, the intelligent level of FTTR network room-level management and the resource allocation efficiency are improved. According to the invention, the real-time performance of optical fiber link quality monitoring and the collaboration of building network management are improved.

The invention discloses a phi-OTDR (Optical Time Domain Reflectometer) vibration signal classification method based on multi-scale residual convolution and a bidirectional long-short-term memory network, relates to the technical field of phase-sensitive optical time domain reflectometer vibration sensing, and solves the problems of insufficient feature extraction, single model fusion mechanism, poor system real-time performance and the like of an existing phi-OTDR vibration signal classification method. The method is realized through the steps of a multi-scale deep convolutional network, a bidirectional long-short term memory network, a cross attention fusion module, a learnable gating mechanism and the like. A cross attention fusion module is adopted, association between spatial features and time sequence features is dynamically established in a double-path network, feature interaction and information coupling are deepened, and the sensing ability of the model to key information is remarkably improved. Meanwhile, the fusion proportion of the multi-path features is adaptively adjusted according to the actual distribution of the input features, background noise interference is effectively suppressed, and the robustness and discrimination performance of the model are enhanced. Accurate identification and classification of external vibration signals are realized.

The invention provides a circuit board high-frequency characteristic detection analysis method and system based on a stub test platform, and the method comprises the steps: obtaining an S parameter of a PCB signal network based on a vector network analyzer (VNA), judging whether the signal transmission loss caused by a stub meets a detection requirement or not, and outputting the length of the stub and carrying out the TDR detection when a VNA detection result is unqualified; the size of a reflected signal of the PCB signal network is obtained based on a time domain reflectometer TDR, whether impedance change caused by a stub in a TDR curve is qualified or not is judged, and when a TDR detection result is not qualified, the specific position of the stub is output, and backdrill capacitance characteristic detection is carried out; capacitance characteristic parameters of the abnormal back drilling via hole are obtained based on back drilling capacitance characteristic detection, and the specific form of the stub is determined. The method and the system are specially used for detecting the stubs in the PCB high-density multilayer board, not only have the remarkable advantages of high precision, high speed and high reliability, but also provide solid technical support for accurate evaluation and strict quality control of product performance.

The invention provides a phase-sensitive optical time domain reflectometer system and method, and the system comprises a first polarization-maintaining coupler which is used for dividing laser generated by a DC laser, and obtaining first laser and second laser; the optical fiber measurement front-end module is used for processing the random signal through pulse shaping and multi-carrier modulation technologies to generate an electric signal, and sequentially performing modulation, amplification, Rayleigh scattering and amplification on the first laser after the electric signal is generated to obtain amplified Rayleigh backscattered light; the second polarization-maintaining coupler is used for dividing the second laser to obtain third laser and local oscillation light; the delay optical fiber is used for processing the third laser to obtain delay light; the third polarization-maintaining coupler is used for combining the delayed light and the amplified Rayleigh backscattered light to obtain combined light; the receiver is used for processing the combined light and the local oscillation light to obtain multiple paths of target electric signals; and the oscilloscope is used for processing multiple paths of target electric signals through low-pass and high-pass filters and a phase noise compensation algorithm so as to determine power and phase distribution. The system cost can be reduced.

The invention discloses a fault repairing method of a server single board and electronic equipment, and relates to the field of server hardware reliability, and the method comprises the steps: scanning a plurality of target signal links of the server single board through a time domain reflectometer, correspondingly comparing the new impedance value and the new reflection waveform characteristic in the scanning result with the initial impedance value and the initial reflection waveform characteristic, determining at least one fault link of the server single board when the comparison result is inconsistent, and performing multi-modal analysis by combining the operation state data of the server single board. And determining the fault level of at least one fault link in the server single board and correspondingly generating a fault repair strategy to switch the fault link to the standby link, thereby solving the problems of single detection dimension, complex fault monitoring blind area, high-frequency signal monitoring failure and the like in the related technology, and improving the detection accuracy. Through time domain reflectometer monitoring, multi-modal data fusion analysis and redundancy switching, fault prediction, accurate positioning and lossless self-repairing of a server single board target signal link are realized.

The invention discloses a composite hose structure for fuel gas transmission, and relates to the technical field of fuel gas transmission and distribution equipment, the composite hose structure comprises a dual-mode quick sealing assembly, dual-mode monitoring is formed by an FBG sensor, a phase-sensitive optical time domain reflectometer and a carbon tube composite filament, the FBG sensor can capture fine strain of a reinforced fiber layer in real time, and the phase-sensitive optical time domain reflectometer can capture the fine strain of the reinforced fiber layer in real time; the phase-sensitive optical time domain reflectometer detects and captures stress waves generated by crack propagation in a material through broadband sound waves, early recognition of millimeter-level damage in a pipe is achieved, grids woven by carbon tube composite filaments are utilized, continuity of the grids is monitored in real time through alternating-current impedance measurement, and the detection accuracy of the millimeter-level damage in the pipe is improved. When local grid resistance is increased due to breakage of the reinforced fiber layer, a micro-damage area can be accurately positioned, when leakage occurs, the memory alloy spring receives an electric signal monitored by a dual-mode, then axial thrust is generated to push the outer side of the fluororubber sealing ring, the fluororubber sealing ring expands in the radial direction under the thrust action of the memory alloy spring, and the leakage is prevented. And rapid and effective mechanical hard sealing is realized.

The invention discloses an experimental device and an experimental method for monitoring oil-gas-water components in a shaft, and particularly relates to the technical field of monitoring equipment.The experimental device comprises the shaft, a single-mode laser, a polarization maintaining optical fiber, a Brillouin optical time domain reflectometer, a condensate gas tank, a pressurization driving device, a stratum water tank, a condensate oil tank, a natural gas tank, a conveying device, an oil-gas-water separator and a waste oil tank; the polarization-maintaining optical fiber is spirally wound outside the shaft, and two ends of the polarization-maintaining optical fiber are respectively connected with the single-mode laser and the Brillouin optical time domain reflectometer; the pressurization driving device is used for pressurizing the condensate gas to the dew point pressure higher than that of the condensate gas and driving the condensate gas to leave the condensate gas tank; the conveying device is used for conveying formation water of the formation water tank, condensate oil of the condensate oil tank and natural gas of the natural gas tank to the shaft, and an outlet of the shaft is connected with the waste oil tank through the oil-gas-water separator. The oil-gas-water three-phase fluid in the shaft can be captured and dynamically tracked in real time, the measurement precision is high, and the experimental device is simple in structure and convenient to install.

The invention relates to the technical field of elevator equipment detection, and discloses an elevator traveling cable dynamic fault detection method, system and device and a medium, and the method comprises the following steps: obtaining multi-mode state data of each line of a traveling cable and elevator operation state data; inputting the operation state data into a preset electromechanical coupling model to obtain a corresponding multi-dimensional health reference signal vector; performing time alignment on the multi-modal state data and the reference vector, and performing subtraction to obtain a multi-dimensional signal residual sequence; inputting the residual error sequence into a pre-training deep learning classification model to obtain a preliminary fault judgment result; a final result is confirmed through causal analysis; and if the fault exists, target fault information is obtained through the time domain reflectometer, and visual information is generated and sent to the human-computer interaction interface. According to the embodiment of the invention, the electrical characteristics of the cable and the mechanical motion state of the elevator are dynamically coupled, and high-precision and high-efficiency fault early warning and diagnosis are realized.

The invention provides an optical fiber detection method and system for an optical time domain reflectometer, and relates to the technical field of power grids. According to the invention, the multi-wavelength backscattering signal of the optical fiber link to be detected is acquired, preprocessed and converted into the sample to be detected containing the multi-wavelength one-dimensional waveform data and the multi-wavelength two-dimensional diagram data at the same time, so that the sequence characteristic of the light intensity of each wavelength changing along with time is reserved; and spatial features of correlation and structural information between wavelengths can be reflected through data conversion construction, and multi-dimensional and structured representation of optical fiber events is realized. And combined analysis and recognition are carried out by combining a fault recognition model, and a time sequence rule in a one-dimensional waveform and a spatial distribution mode in a two-dimensional diagram are cooperatively mined, so that deep fusion and intelligent analysis of optical fiber fault spatial-temporal characteristics are realized, and the recognition capability of a complex fault mode is improved. The technical problem of low accuracy of optical fiber fault detection with a single wavelength at present is solved, and the accuracy and reliability of optical cable line fault detection are improved.

The invention relates to the technical field of circuit board impedance measurement, and provides a multilayer soft board FA impedance board measurement method, which comprises the following steps: S1, cutting and drilling a base material; s3, target drilling and laser windowing: 1) drilling positioning target holes in four corners of a laminated plate by using an X-ray target drilling machine, and windowing; and S4, impedance testing: carrying out impedance measurement on the exposed FA impedance line by using a time domain reflectometer. According to the technical scheme, the problems that in the existing FPC industry, due to the fact that a dielectric layer of a multi-layer soft board is complex, glue layers and PI layers are stacked repeatedly, and an impedance analog value is often greatly different from an actual value, in general, an impedance FA batch needs to be tried to be made before a formal batch of products is made, and whether the impedance is qualified or not needs to be verified are solved; the problem that the delivery cycle of a formal product is seriously influenced due to the fact that impedance measurement can only be carried out after an outer layer etching circuit is manufactured due to the fact that an impedance product is contained in the inner layer of the multi-layer soft board is solved.

An Optical Time-Domain Reflectometer (OTDR) trace correction method, an electronic device, and a storage medium are disclosed. The method may include: establishing a parameter decoupling equation according to a fiber loss coefficient and a Stimulated Raman Scattering (SRS) transfer coefficient in response to ignoring an SRS transfer amount amplified or absorbed by an OTDR wavelength in an Optical Transport Network (OTN) service; disabling a service wavelength of an OTN of an optical fiber transmission system, and acquiring, according to the parameter decoupling equation, a first OTDR trace of an OTDR simulation wavelength in the optical fiber transmission system when the service wavelength of the OTN is in a disabled state; determining a fiber loss coefficient according to the first OTDR trace.

The application provides a phase-sensitive optical time domain reflectometer, a measurement method and a readable storage medium, wherein a signal generation circuit of the phase-sensitive optical time domain reflectometer is configured to generate a radio frequency signal to drive an optical intensity modulator to modulate probe light, so that two groups of frequency division multiplexing sequences with differences can be used to synchronously detect a sensing optical fiber to be measured, a differential unfolding algorithm is combined to accurately solve a phase change amount in adjacent sampling intervals, and then demodulation results corresponding to different frequency parts are respectively unfolded to obtain unfolded phase results, so that the problem of large strain phase folding is solved and a large strain range is recovered, and further, the unfolded phase results are rearranged and combined in time sequence through time sequence interleaving processing of the unfolded phase results, so that a high sampling rate and a distortion-free reconstruction result are reconstructed, and therefore, the application can realize accurate measurement of high frequency response and large strain range dynamic strain.

The application provides a double-end optical lightning stroke positioning method and system applied to power overhead optical cables, and relates to the technical field of optical fiber sensing; the basic principle of positioning is to realize single-end lightning stroke positioning based on the obvious change of the polarization state of optical signals after the optical signals encounter lightning strokes; the application first uses counter-transmitted pulse polarized light to detect a single-end lightning stroke positioning point, then establishes a double-end positioning equation set to solve an actual lightning stroke positioning point, so that accurate lightning stroke positioning is realized; the application uses the Faraday optical rotation effect of lightning strokes on optical signals to realize lightning stroke positioning based on a polarized light time domain reflectometer; compared with traditional lightning stroke positioning, the application has low operation and maintenance cost, high precision, does not need wide-area accurate time synchronization, has a simple system, is convenient to install, and reduces the blind area of lightning stroke positioning.

A system and method for distributed temperature and strain sensing using Chirp-Pulse Coherent Optical Time-Domain Reflectometry (CP-COTDR) utilizes optical flow processing. The method involves constructing a two-dimensional (2-D) waterfall data array from collected CP-COTDR frames. Optical flow processing is applied directly to the 2-D data to estimate the local shift of features caused by external perturbations. The optical flow is preferably calculated using a weighted least squares method with an adaptive analysis window based on the local flatness of signal derivatives. This approach provides versatile and high spatial resolution, reduces accumulative errors, and enables efficient data processing compared to conventional cross-correlation techniques.

The invention discloses an in-operation OPGW icing tension monitoring method based on a micrometeorological temperature demodulation BOTDR. The method comprises the following steps: measuring through a Brillouin optical time domain reflectometer to obtain OPGW Brillouin frequency shift data; calibrating a Brillouin frequency shift temperature sensitivity coefficient and a Brillouin frequency shift tension sensitivity coefficient of the OPGW by using the data of the microclimate icing monitoring terminal; according to the Brillouin scattering principle, all Brillouin frequency shifts are converted into Brillouin equivalent temperatures; the external environment temperature of the OPGW is measured through the micro-meteorological icing monitoring terminal and is defined as temperature data of the micro-meteorological icing monitoring terminal; calculating a difference value between the Brillouin equivalent temperature and the temperature data of the microclimate icing monitoring terminal; and when the temperature difference value is greater than or equal to the temperature measurement precision of the Brillouin optical time domain reflectometer, the icing tension is calculated. According to the invention, the Brillouin frequency shift temperature sensitivity coefficient and the Brillouin frequency shift tension sensitivity coefficient can be directly calibrated on line, and the calibration result and the icing tension monitoring result are more accurate.

In some examples, high speed bidirectional OTDR-based testing may include transmitting data from a first end of a device under test (DUT) towards an optical time-domain reflectometer (OTDR) that is operatively connected to a second opposite end of the DUT. Further data that is transmitted by the OTDR may be received from the second opposite end of the DUT towards the first end of the DUT. Based on an amplitude of the further data, a direction of receiving of the further data may be adjusted towards a first receiver or towards a second receiver.

The invention relates to a signal noise suppression system based on an optical time domain reflectometer, and the system comprises a transmitting unit which is used for generating an optical time domain reflection pulse signal with preset parameters according to control information; the testing unit is connected with the transmitting unit and the optical fiber to be tested and is used for injecting the received pulse signal into the optical fiber to be tested and guiding the reflected echo optical signal into the receiving unit; the receiving unit is connected with the testing unit and is used for receiving the echo optical signal and converting the echo optical signal into a digital signal, so that the data processing unit can receive and process the digital signal conveniently; and the data processing unit is respectively connected with the receiving unit and the transmitting unit and is used for carrying out range dynamic filtering processing according to the data signal transmitted by the receiving unit, storing the filtered signal and transmitting control information to the transmitting unit, so that the transmitting unit generates a pulse signal with a preset parameter according to the signal. The technical problems of signal broadening deformation and time delay, slow system operation, increased test blind area and the like in the prior art are solved.

1. The name of this design product: Multifunctional Optical Time Domain Reflectometer (SW100). 2. Purpose of this product: This product is used to measure optical fiber length, optical fiber transmission attenuation, connector attenuation and fault location. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

A method for characterizing a cable or transmission line is provided, comprising: obtaining a first echo response using time-domain reflectometry; coupling a first end of the cable or transmission line to a time-domain reflectometer; Obtaining a second echo response using time domain reflectometry; determining a characteristic of the cable or transmission line by comparing the first echo response and the second echo response.

In some examples, a tunable dense wavelength division multiplexing (DWDM) optical time-domain reflectometer (OTDR) may include a fiber optic link analyzer, executed by at least one hardware processor, to determine, based on a user input, for a fiber optic link of a plurality of fiber optic links of a fiber optic cable, whether the fiber optic link is active or not active. The DWDM OTDR may specify, based on a determination that the fiber optic link is active, a test wavelength that is different from a data transmission wavelength of data transmitted by the fiber optic link. A DWDM multiplexer may be collocated with the DWDM OTDR to selectively connect, based on the specified test wavelength, the DWDM OTDR to the fiber optic link of the plurality of fiber optic links for testing of the fiber optic link.

A kind of distributed multi-parameter sensing system based on multi-core optical fiber, including laser, laser light source is sent to the signal generator input trigger pulse drive respectively with the signal input end of phase-sensitive optical time domain reflectometer based on Rayleigh scattering and its demodulation device, Raman optical time domain reflectometer based on Raman scattering and its demodulation device, Brillouin optical time domain reflectometer based on Brillouin scattering and its demodulation device are connected, the signal output end of phase-sensitive optical time domain reflectometer and its demodulation device, Raman optical time domain reflectometer and its demodulation device, Brillouin optical time domain reflectometer and its demodulation device is connected with the signal input end of multi-core optical fiber through multi-core optical fiber fan-in fan-out module;The present application utilizes the principle of space division multiplexing, each fiber core in optical cable as separate sensing channel carries out measurement and signal transmission;Multi-core optical fiber fuses three kinds of distributed optical fiber sensing systems together, realizes in-situ measurement and mutual compensation decoupling of temperature, strain and vibration, improves the measurement precision of sensing system.

The application discloses an IC carrier board testing method and system, mainly relates to the technical field of IC carrier board, to solve the problem of single detection dimension, insufficient positioning accuracy and low test efficiency of the existing scheme. Including: screening out test points with contact resistance value exceeding threshold value or not conducting as detection objects; using TDR time domain reflectometer to perform impedance test under 1GHz frequency band, identifying impedance abnormal area; monitoring the temperature distribution of the IC carrier board, obtaining monitoring temperature points exceeding the preset temperature; determining the monitoring temperature points coinciding with the detection objects or the impedance abnormal area as the abnormal heat conduction points between the multilayer circuits, recording the temperature gradient data of the abnormal heat conduction points; using a preset torque to perform a preset micro stress loading on the IC carrier board; comparing the resistance value change rate of the IC carrier board before and after stress application, and determining the defect type of the carrier board according to the specific preset defect interval where the resistance value change rate falls.

1. Name of the product in this design: Optical Time Domain Reflectometer (Simplified Version). 2. Purpose of this design: For testing fiber optic signals. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention belongs to the field of distributed optical fiber sensing and coding and decoding, and provides a Brillouin optical time domain reflection signal decoding method and system based on rising edge assistance. The rising edge assistance-based Brillouin optical time domain reflection signal decoding method comprises the following steps: acquiring a time domain coding response signal corresponding to a coding pulse sequence injected into an optical fiber by a Brillouin optical time domain reflectometer; performing discrete Fourier transform on the time domain coding response signal to obtain a frequency domain coding response signal; according to the signal increment and the duration of the rising edge of the time domain coding response signal, reconstructing a decoding function and replacing the decoding function in the frequency domain coding response signal with the reconstructed decoding function; the decoding function is a sequence formed by a decoding weight corresponding to each code element; and performing inverse discrete Fourier transform on the frequency domain coding response signal to obtain a decoded signal. According to the method, the signal-to-noise ratio of the decoded SpBS signal can be remarkably improved, and the Brillouin frequency shift (BFS) extraction precision is enhanced.

The present invention relates to an abnormality handling method, system, and terminal for oilfield detection optical cables, and relates to the field of communication optical cable detection. The method comprises: collecting the signal transmission status of the detection optical cable from a platform end; based on the inconsistency between the signal transmission status and a preset reference signal status, controlling a preset optical time domain reflectometer to perform detection at a preset reference detection position of the detection optical cable and collecting feedback waveform information; identifying a preset mutation signal from the feedback waveform information; analyzing the mutation signal from the feedback waveform information to determine the abnormality distance, and determining the abnormal position based on the reference detection position and the abnormality distance; controlling a preset repair robot to move to the abnormal position along a preset cable laying path, detecting and repairing the abnormality of the detection optical cable. The present application has the effect of reducing the risk of abnormality inspection and maintenance of oilfield detection optical cables.

The invention relates to the field of optical fiber pipeline monitoring, in particular to a safety monitoring method and equipment for an optical fiber pipeline and a medium, and the method comprises the steps that an unmanned aerial vehicle carries an optical time domain reflectometer and environment monitoring equipment to fly along the pipeline, and reflected light information and environment parameters such as temperature, humidity, air pressure and flight relative height are synchronously obtained. And after an initial leakage position is determined based on the reflected light information, an adaptive leakage position correction model is selected from a preset reference table according to the environmental parameters corresponding to the position. And the offset is calculated by substituting the environmental parameters into the correction model, and the target leakage position is obtained. According to the method, multi-source data fusion and a precise correction model are utilized, interference of environmental factors on positioning is effectively eliminated, the precision and reliability of optical fiber pipeline leakage positioning are remarkably improved, and the method is suitable for a pipeline safety monitoring scene in a complex environment.