CN-121998628-A - Urban underground pipeline external force damage and road collapse supervision method and device

CN121998628ACN 121998628 ACN121998628 ACN 121998628ACN-121998628-A

Abstract

The invention relates to a method and a device for supervising the external force damage and road collapse of an urban underground pipeline, belonging to the technical field of pipeline external force damage and road collapse supervision, wherein the method comprises the following steps that an improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system senses vibration signals, and the vibration signals are processed and converted into a time-frequency spectrogram; the method comprises the steps of inputting a time-frequency spectrogram into a pre-trained abnormal vibration signal classification recognition and risk judgment model to obtain a diagnosis result, outputting the diagnosis result in a structured format, uploading the diagnosis result, the occurrence time and the geographic position to an intelligent control platform in real time, dynamically marking a GIS map by the intelligent control platform according to event types and risk grades to generate a structured electronic maintenance work order, and monitoring maintenance progress by the intelligent control platform in real time to ensure work order closed loop. The invention can effectively sense, diagnose and early warn the external damage of the underground pipeline and the collapse of the road with low cost, high safety and easy operation.

Inventors

HAN BAOJIANG
TANG ZHILI
WANG XUEXUAN
LI SONGYUE
LIU YUZHANG
LI XINLONG
LI XINYU

Assignees

北京信息基础设施建设股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260408
Priority Date: 20251230

Claims (10)

1. A city underground pipeline external force damage and road collapse supervision method is characterized by comprising the following steps: The improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system senses vibration signals and processes and converts the vibration signals into a time-frequency spectrogram; Inputting the time-frequency spectrogram to a pre-trained abnormal vibration signal classification recognition and risk judgment model to obtain a diagnosis result, and outputting the diagnosis result in a structured format; Uploading the diagnosis result, the occurrence time and the geographic position to an intelligent management and control platform in real time, and dynamically marking a GIS map by the intelligent management and control platform according to the event type and the risk level to generate a structured electronic maintenance work order; the intelligent control platform monitors maintenance progress in real time and ensures work order closed loop; The diagnosis result comprises an abnormal event type and an abnormal event risk level; the improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system is a monitoring device with transmitting, receiving and processing capabilities, which is obtained by integrating a chirp high-order modulation technology, a multidimensional aliasing demodulation technology, a hanning window pulse envelope signal processing technology and a system on the basis of a hardware architecture.
2. The method for supervising the external damage and the road collapse of the urban underground pipeline according to claim 1, wherein the hardware architecture is obtained by integrating and modularly assembling a laser, an arbitrary waveform generator, an optical pulse modulator, an optical amplifier, a band-pass filter, a polarization maintaining optical fiber circulator, a polarization diversity coherent receiver and an analog-to-digital converter through an optical and electrical signal interface; The connection relation of the hardware architecture comprises that a laser is connected with an optical pulse modulator, an arbitrary waveform generator is connected with the optical pulse modulator, the optical pulse modulator is connected with a first optical amplifier, the first optical amplifier is connected with a second optical amplifier, the second optical amplifier is connected with a band-pass filter, the band-pass filter is connected with a polarization maintaining optical fiber circulator, an optical fiber to be tested, the band-pass filter and a polarization diversity coherent receiver are all connected with the polarization maintaining optical fiber circulator, and the polarization diversity coherent receiver is connected with an analog-to-digital converter; The signal trend of the hardware architecture comprises that a stable optical carrier wave output by a laser enters an optical pulse modulator, a multi-frequency radio frequency signal or a chirp signal is generated by an arbitrary waveform generator and is sent into the optical pulse modulator, frequency division multiplexing or chirp modulation is carried out on the optical carrier wave, the modulated optical signal then enters a first optical amplifier controlled by driving, the first optical amplifier is allowed to pass through only during the shutter opening period, so as to form detection optical pulses, the detection optical pulses are amplified by the power of a second optical amplifier, stray sidebands and carrier wave leakage are filtered through a band-pass filter, finally the detection optical pulses are injected into an optical fiber to be detected, when the optical fiber to be detected is disturbed by external force along the line, the phase of Rayleigh back scattered light is changed, corresponding echo light returns along the original path, the echo light is guided to a polarization diversity coherent receiver through a polarization diversity coherent receiver, the polarization diversity coherent receiver simultaneously receives optical signals of X and Y, two groups of electric signals used for reducing vibration information are output, and the two groups of electric signals are sampled and digitized through an analog-digital converter.
3. The method for supervising the external damage and road collapse of an urban underground pipeline according to claim 1, wherein the training step of the pre-trained abnormal vibration signal classification recognition and risk determination model comprises: Constructing a time-frequency spectrogram data set of urban underground pipeline multi-category external damage and road collapse signals; training an algorithm through a time-frequency spectrogram data set of urban underground pipeline multi-category external damage and road collapse signals; In the training process, tuning is conducted through expert guidance, and a pre-trained abnormal vibration signal classification recognition and risk judgment model is formed; the algorithm is a lightweight convolutional neural network target detection architecture based on deep learning as a basic model, and is developed for abnormal vibration signal classification recognition and risk judgment algorithms for urban underground pipeline external damage and road structure abnormality.
4. The method for supervising the external damage and road collapse of urban underground pipeline according to claim 1, wherein the structured electronic maintenance work order comprises work order number, event type, occurrence position, occurrence time, risk level, recommended disposal unit and disposal time limit.
5. The method for supervising the external damage and the road collapse of the urban underground pipeline according to claim 1, wherein the intelligent control platform monitors the maintenance progress in real time, and comprises the steps of monitoring the state of an electronic maintenance work order in real time by the intelligent control platform; The state of the electronic maintenance work order at least comprises dispatched, processed, completed and closed; When the state of the electronic maintenance work order is dispatched, the state of the electronic maintenance work order is not responded in a preset time period, the electronic maintenance work order is upgraded to an emergency level, and a notification is sent to an upper manager; when the closing state of the electronic maintenance work order receives the operation of a worker, displaying an uploading live photo and a disposal report column, and after the worker uploads the live photo and the disposal report, modifying the state of the electronic maintenance work order to be closed; When the operator receives the operation of the operator at the end of the field treatment, the state of the electronic maintenance work order is modified to be completed.
6. The method for supervising the external damage and road collapse of an urban underground pipeline according to claim 1, wherein the chirped high-order modulation technique comprises: Generating an electric signal with linear frequency modulation characteristic by an arbitrary waveform generator, and driving an optical pulse modulator to perform intensity and frequency joint modulation on continuous laser to form a detection pulse with the frequency linearly changing along with time; At the optical signal receiving end, the back scattered light is guided to a polarization diversity coherent receiver through a polarization maintaining fiber circulator, is detected along X, Y orthogonal polarization states respectively, two paths of photocurrent signals are output, the two paths of photocurrent signals are sent to a digital signal processing unit after analog-to-digital conversion, and are jointly processed through an X-axis phase recovery algorithm and a Y-axis phase recovery algorithm, so that complete complex phase information is obtained; performing time-frequency domain joint analysis on the complete complex phase information, and converting the complete complex phase information from a one-dimensional time sequence to a two-dimensional time-frequency spectrogram; The Hanning window pulse envelope signal processing technology comprises the step of adopting a Hanning window envelope as an intensity modulation function of detection pulses in a multidimensional aliasing demodulation process.
7. The method for monitoring and controlling the external damage and the road collapse of the urban underground pipeline according to claim 3, wherein the constructing the time-frequency spectrogram data set of the multi-category external damage and the road collapse signals of the urban underground pipeline comprises the following steps: collecting the mapping relation between event types and vibration signal characteristics, and demodulating the vibration signal; performing time-frequency transformation on the demodulated vibration signal through short-time Fourier transformation to obtain a time-frequency spectrogram, and extracting multidimensional features from the time-frequency spectrogram; based on statistical analysis and a clustering algorithm, feature modes of various event types are induced, and a preliminary association rule of vibration signal features and damage types is established; Labeling the data of all the time-frequency spectrograms; The event types comprise typical construction operation events, road structure abnormal events, normal running state events and other interference source signal events; The multidimensional features comprise a time domain, a time-frequency domain and a space domain; the annotation content comprises event type, occurrence time, spatial position and risk level.
8. An urban underground pipeline external force damage and road collapse supervision device, which is characterized by comprising: the processing module is used for sensing vibration signals by the improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system and converting the vibration signals into a time-frequency spectrogram; The output module is used for inputting the time-frequency spectrogram into a pre-trained abnormal vibration signal classification recognition and risk judgment model to obtain a diagnosis result, and outputting the diagnosis result in a structural format; the generation module is used for uploading the diagnosis result, the occurrence time and the geographic position to the intelligent control platform in real time, and the intelligent control platform dynamically marks a GIS map according to the event type and the risk level to generate a structured electronic maintenance work order; the monitoring module is used for the intelligent control platform to monitor the maintenance progress in real time and ensure the work order closed loop; The diagnosis result comprises an abnormal event type and an abnormal event risk level; the improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system is a monitoring device with transmitting, receiving and processing capabilities, which is obtained by integrating a chirp high-order modulation technology, a multidimensional aliasing demodulation technology, a hanning window pulse envelope signal processing technology and a system on the basis of a hardware architecture.
9. An electronic device is characterized by comprising a processor and a memory; the processor is used for executing the urban underground pipeline external damage and road collapse supervision method according to any one of claims 1 to 7 by calling the program or the instructions stored in the memory.
10. A computer-readable storage medium storing a program or instructions that cause a computer to perform a method of urban underground pipeline damage and road collapse supervision according to any one of claims 1 to 7.

Description

Urban underground pipeline external force damage and road collapse supervision method and device Technical Field The invention belongs to the technical field of pipeline external force damage and road collapse supervision, and particularly relates to a method and a device for supervising urban underground pipeline external force damage and road collapse. Background At present, the monitoring means for the external damage of the urban underground pipeline and the road collapse mainly comprise the following steps. Firstly, traditional manual inspection, inspection personnel periodically inspect to check the health state of pipelines and roads. And secondly, a point type sensor is arranged, and whether the pipeline is damaged by external force or not and whether the road collapses or not is judged by monitoring the physical quantity change (such as vibration, strain and the like) of a specific point. And thirdly, laying optical fibers on the surface of the newly built pipeline close to the pipe wall, or re-laying the optical fibers on the existing pipeline close to the pipe wall, and monitoring vibration disturbance suffered by the optical fibers in real time by utilizing a distributed optical fiber vibration sensing technology. When the pipeline is damaged by external force (such as third party construction excavation) or the surrounding roads collapse and other abnormal events occur, vibration strain change of the perceived position of the optical fiber is caused, so that the phase of the optical signal is obviously deviated, and operation and maintenance personnel can recognize and position the abnormal events in time by detecting and analyzing the phase change characteristics, so that the health state of the pipeline is judged. Traditional manual inspection is low in efficiency, limited in coverage, difficult to monitor all weather and without dead angles, incapable of capturing instant abnormal signals and incapable of realizing real-time monitoring and active early warning. Although the point sensor can effectively monitor to a certain extent, the cost is high, and the continuous monitoring requirement under the linear space position is difficult to meet. The optical fiber is laid on the surface of the newly built pipeline, or the optical fiber is laid again on the existing pipeline, the distributed optical fiber monitoring technology is high in cost and complex in operation, and the laid cables in the underground pipeline and the pipeline are easily damaged in the laying process, so that the safe operation of the underground pipeline and the pipeline is prevented. Disclosure of Invention In view of the above shortcomings of the prior art, an object of the present invention is to provide a method and apparatus for monitoring and controlling external damage and road collapse of urban underground pipelines by combining existing communication transmission networksThe monitoring technology solves the problems that the prior art cannot effectively sense, diagnose and early warn the external damage of the underground pipeline and the road collapse with low cost, high safety and easy operation. The first aspect of the invention provides a method for supervising the external damage and road collapse of an urban underground pipeline, which comprises the following steps: The improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system senses vibration signals and processes and converts the vibration signals into a time-frequency spectrogram; inputting the time-frequency spectrogram into a pre-trained abnormal vibration signal classification recognition and risk judgment model to obtain a diagnosis result, and outputting the diagnosis result in a structured format; uploading the diagnosis result, the occurrence time and the geographic position to an intelligent management and control platform in real time, and dynamically marking a GIS map by the intelligent management and control platform according to the event type and the risk level to generate a structured electronic maintenance work order; The intelligent control platform monitors the maintenance progress in real time, and ensures the work order to be closed; the diagnosis result comprises an abnormal event type and an abnormal event risk level; the improved high-sensitivity phase-sensitive optical time domain reflectometer monitoring system is a monitoring device with transmitting, receiving and processing capabilities, which is obtained by integrating a chirp high-order modulation technology, a multidimensional aliasing demodulation technology, a hanning window pulse envelope signal processing technology and a system on the basis of a hardware architecture. Further, in the method for supervising the external damage and road collapse of the urban underground pipeline, the hardware architecture is obtained by integrating and modularly assembling a laser, an arbitrary waveform generator, an optical pulse modulator, an optical am