Optical cable burial depth detection method and system, electronic equipment and storage medium

Abstract

The invention relates to the technical field of optical fiber sensing, in particular to an optical cable burial depth detection method and system, electronic equipment and a storage medium. The method comprises the following steps: acquiring first vibration data of an optical cable acquired by phase-sensitive optical time domain reflection equipment, wherein the phase-sensitive optical time domain reflection equipment is connected to the optical cable; acquiring second vibration data acquired by the seismic detection equipment; performing alignment processing on the first vibration data and the second vibration data, comparing take-off points of the first vibration data and the second vibration data after alignment processing, and determining burial depth data of the optical cable according to a comparison result; according to the method, the burial depth of the optical cable can be rapidly and accurately measured, the propagation velocity of vibration in different soil environments does not need to be estimated, the method has the advantages of being easy and convenient to operate and controllable in cost, the operation safety of an oil and gas pipeline can be improved, the maintenance and overhaul process can be optimized, the operation cost can be reduced, and the increasingly strict industry safety standard is met.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber sensing technology, and more specifically, to an optical cable buried depth detection method, system, electronic equipment and storage medium. Background Art

[0002] As global energy demand continues to grow, the safe operation and management of oil and gas pipelines, as important channels for energy transportation, have become particularly critical. Oil and gas pipelines usually span a wide geographical area, including diverse terrains such as cities, farmlands, mountains and rivers. In order to ensure that the pipelines can achieve monitoring, data transmission and remote control, optical cables are often laid alongside oil and gas pipelines to provide the necessary communication infrastructure. However, oil and gas pipelines and the accompanying optical cables face multiple challenges during construction and operation. One of them is the burial depth of the optical cable. The burial depth of the optical cable is crucial to protect the optical cable from external damage, ensure the stability of signal transmission, and comply with relevant safety regulations.

[0003] At present, there are certain limitations in the methods of detecting the buried depth of optical cables. Traditional detection methods, such as manual excavation or the use of ground detection radar, are costly and inefficient. In addition, manual excavation or radar detection is not possible in some areas, resulting in the inability to accurately detect the buried depth of optical cables. In addition, with the continuous expansion of oil and gas pipeline networks, higher requirements are placed on the real-time monitoring and management of the buried depth of optical cables. Therefore, it is particularly necessary to develop an efficient, accurate and cost-effective method for detecting the buried depth of optical cables. Summary of the invention

[0004] The present invention aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provide a method, system, electronic device and storage medium for detecting the buried depth of an optical cable to achieve rapid and accurate measurement of the buried depth of the optical cable.

[0005] According to a first aspect of the present application, a method for detecting buried depth of an optical cable is provided, comprising:

[0006] Acquire first vibration data of the optical cable collected by a phase-sensitive optical time-domain reflectometry device, wherein the phase-sensitive optical time-domain reflectometry device is connected to the optical cable;

[0007] Acquiring second vibration data collected by the seismic geophone device;

[0008] Performing alignment processing on the first vibration data and the second vibration data, comparing the starting points of the aligned first vibration data and the second vibration data, and determining the buried depth data of the optical cable according to the comparison result;

[0009] The first vibration data of the phase-sensitive optical time domain reflectometer and the second vibration data of the seismic detector are collected by:

[0010] A first detection knock is performed at a ground position directly above the optical cable route at a certain distance from the seismic detection equipment, and the phase-sensitive optical time domain reflection equipment is used to collect the vibration signal formed in the optical cable by the first detection knock to obtain the first vibration data, and the seismic detection equipment is used to collect the vibration signal formed on the ground by the first detection knock to obtain the second vibration data.

[0011] It is understandable that the phase-sensitive optical time domain reflectometry device collects the vibration signal formed in the optical cable as the first vibration data, and the seismic detection device collects the vibration signal formed on the ground as the second vibration data. Both collect the vibration signal generated by the knocking, and use the collected corresponding vibration data as important comparison data, so as to achieve the purpose of determining the buried depth of the optical cable.

[0012] It can be understood that after obtaining the first vibration data collected by the phase-sensitive optical time domain reflection device and the second vibration data collected by the seismic detection device, the method aligns the first vibration data and the second vibration data, compares the starting points of the first vibration data and the second vibration data after the alignment, and determines the buried depth data of the optical cable according to the comparison result.

[0013] Optionally, the optical cable route is determined directly above by:

[0014] In the direction intersecting the optical cable route, a plurality of route knocking points are set at a certain distance interval and knocked respectively, and the position of the route knocking point corresponding to the maximum amplitude of the vibration data obtained by the phase-sensitive optical time domain reflection device is directly above the optical cable route.

[0015] It is understandable that placing the seismic detection device just above the optical cable route can facilitate measurement of the distance from the detection strike point to the seismic detection device and obtain accurate burial depth data.

[0016] Optionally, the aligning the first vibration data and the second vibration data specifically includes:

[0017] The first vibration data and the second vibration data are aligned according to the time information to obtain the aligned first vibration data and the second vibration data.

[0018] It is understandable that the phase-sensitive optical time-domain reflection device collects the first vibration data and the seismic detection device collects the second vibration data separately. The collected first vibration data and the second vibration data need to be placed on the same time axis in the alignment processing action to have comparison significance, so the first vibration data and the second vibration data need to be aligned according to the time information.

[0019] Optionally, the time information is generated by a time synchronization module; the phase-sensitive optical time domain reflectometer and the seismic detection device are both equipped with the time synchronization module.

[0020] Optionally, the time synchronization module is a GPS module; and the phase-sensitive optical time domain reflectometry device is a distributed fiber optic acoustic wave sensing device.

[0021] It is understandable that the GPS module aligns the first vibration data and the second vibration data in time by providing the time information of the tapping, and can identify the vibration data generated by the tapping of this application through the time information provided by the GPS, thereby reducing the interference of noise data.

[0022] Optionally, comparing the starting points of the first vibration data and the second vibration data after the alignment processing, and determining the buried depth data of the optical cable according to the comparison result, specifically includes:

[0023] Analyze the starting points of the first vibration data and the second vibration data after the alignment processing. If the two starting points coincide with each other, obtain the distance between the position point corresponding to the first detection knocking and the seismic detection equipment, and use the distance as the buried depth data of the optical cable.

[0024] It is understandable that the coincidence of the starting points of the first vibration data and the second vibration data after the alignment process indicates that the distance of the vibration signal generated by the detection striking point to the optical cable is consistent with the distance to the seismic detection equipment. At this time, it is necessary to determine the corresponding second vibration data, that is, the vibration data collected by the seismic detection equipment, and record the distance between the detection striking point corresponding to the second vibration data and the seismic detection equipment, and use the distance as the burial depth data of the optical cable.

[0025] Optionally, the comparing the starting points of the first vibration data and the second vibration data after the alignment processing, and determining the buried depth data of the optical cable according to the comparison result, further includes:

[0026] When the starting points of the first vibration data and the second vibration data after the alignment processing do not coincide with each other, the starting point occurrence time of the first vibration data and the second vibration data after the alignment processing is compared, and the position of the detection tapping point is adjusted according to the starting point occurrence time, thereby adjusting the distance between the detection tapping point and the seismic detection equipment, and performing the second detection tapping according to the adjusted detection tapping point, until a detection tapping point is found so that the comparison result is that there is a coincident starting point in the first vibration data and the second vibration data.

[0027] It is understandable that the starting points of the first vibration data and the second vibration data after the alignment process do not coincide with each other, which means that there is a distance difference between the distance of the vibration signal generated by the detection knocking point reaching the optical cable and the distance reaching the seismic detection equipment. At this time, it is necessary to continue to find the detection knocking point that can make the starting points of the first vibration data and the second vibration data after the alignment process coincide with each other.

[0028] Optionally, adjusting the position of the detection striking point according to the occurrence time of the take-off point, thereby adjusting the distance between the detection striking point and the seismic detection device, specifically includes:

[0029] According to the occurrence time of the starting points of the first vibration data and the second vibration data, the time sequence relationship of the starting points on the first vibration data and the second vibration data is obtained, and the distance relationship between the position point corresponding to the first detection knocking and the optical cable and the seismic detection equipment is determined according to the time sequence relationship, and the position of the detection knocking point is adjusted according to the distance relationship, thereby adjusting the distance from the detection knocking point to the seismic detection equipment.

[0030] It can be understood that by comparing the occurrence time of the starting points of the first vibration data and the second vibration data after the alignment processing, the position of the detection knocking point is adjusted, thereby adjusting the distance between the detection knocking point and the seismic detection equipment, so as to achieve the purpose of finding a certain detection knocking point that makes the first vibration data and the second vibration data have a consistent starting point.

[0031] Optionally, performing the first detection tapping at a ground position directly above the optical cable route at a certain distance from the seismic detection device specifically includes:

[0032] The first detection knock is performed at least once at a ground position directly above the optical cable route at a certain distance from the seismic detection device to generate a detection vibration signal, and the phase-sensitive optical time domain reflection device obtains the first vibration data based on the received detection vibration signal, and the seismic detection device obtains the second vibration data based on the received detection vibration signal.

[0033] It is understandable that the first detection knock can be performed at least once at the ground position directly above the optical cable route at a certain distance from the seismic detection equipment, that is, the number of knocks is flexible under the premise of ensuring that the comparison result can be found: the starting points of the first vibration data and the second vibration data coincide with each other.

[0034] Optionally, the seismic detection equipment is arranged directly above the optical cable route.

[0035] According to a second aspect of the present application, there is provided an optical cable buried depth detection system, comprising:

[0036] An acquisition module is used to acquire first vibration data of an optical cable acquired by a phase-sensitive optical time domain reflectometry device, wherein the phase-sensitive optical time domain reflectometry device is connected to the optical cable, and to acquire second vibration data acquired by a seismic geophone device; wherein the first vibration data of the phase-sensitive optical time domain reflectometry device and the second vibration data of the seismic geophone device are acquired by:

[0037] Perform a first detection knock at a ground position directly above the optical cable route at a certain distance from the seismic geophone device, collect a vibration signal formed in the optical cable by the first detection knock using the phase-sensitive optical time-domain reflectometry device to obtain the first vibration data, and collect a vibration signal formed on the ground by the first detection knock using the seismic geophone device to obtain the second vibration data;

[0038] A signal processing module, used for aligning the first vibration data and the second vibration data;

[0039] The comparison module is used to compare the starting points of the first vibration data and the second vibration data after the alignment process, and determine the buried depth data of the optical cable according to the comparison result.

[0040] According to a third aspect of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores computer-readable instructions, and the processor executes the computer-readable instructions to implement a method for detecting buried depth of an optical cable as described in the first aspect above.

[0041] According to a fourth aspect of the present application, a computer storage medium is provided, on which a computer program is stored. When the computer program is executed, the method for detecting the buried depth of an optical cable as described in the first aspect above is implemented.

[0042] Based on any of the above aspects, an optical cable burial depth detection method, system, electronic device and storage medium provided in the embodiment of the present application can obtain the first vibration data collected by the phase-sensitive optical time domain reflection device and the second vibration data collected by the seismic detection device, and align the first vibration data and the second vibration data, compare the starting points of the first vibration data and the second vibration data after the alignment, and determine the burial depth data of the optical cable according to the comparison result. This method can realize the rapid and accurate measurement of the burial depth of the optical cable, and does not need to estimate the propagation speed of vibration in different soil environments. It is easy to operate and cost-controlled. It can improve the operational safety of oil and gas pipelines, optimize maintenance and overhaul processes, reduce operating costs, and meet increasingly stringent industry safety standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 This is a flow chart of the optical cable buried depth detection method provided in this embodiment.

[0045] Figure 2 A schematic diagram of the equipment layout of the optical cable buried depth detection method provided in this embodiment.

[0046] Figure 3 A schematic diagram of the distance between the detection striking point and the seismic detection equipment provided in this embodiment.

[0047] Figure 4 A schematic diagram of the relationship between comparison starting points provided in this embodiment.

[0048] Figure 5 This is an example diagram of the vibration data after alignment processing provided in this embodiment.

[0049] Figure 6 A schematic diagram of the modules of the optical cable buried depth detection system provided in this embodiment.

[0050] Figure 7 This is a device structure diagram of the electronic device provided in this embodiment.

[0051] Icons: 210-device layout orientation, 211-phase-sensitive optical time domain reflectometry equipment, 212-seismic detection equipment, 213-tapping point, 214-optical cable, 311-acquisition module, 312 signal processing module, 313-comparison module, memory-21, processor-22, bus-23, communication interface-24. DETAILED DESCRIPTION

[0052] The drawings of this application are only used for illustrative purposes and should not be construed as limiting the present application. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] This embodiment provides a technical solution that can solve the above problems. The specific implementation of this application is described in detail below with reference to the accompanying drawings. Figure 1 As shown, this embodiment provides a method for detecting the buried depth of an optical cable, which may include the following steps:

[0056] S110, acquiring first vibration data of an optical cable collected by a phase-sensitive optical time domain reflectometry device, wherein the phase-sensitive optical time domain reflectometry device is connected to the optical cable;

[0057] In this embodiment, the device for collecting the vibration signal of the optical cable can use a phase-sensitive optical time-domain reflection device. The device is based on the strong perception of the light transmitted in the optical fiber to the surrounding environment, and the effect of vibration on the transmitted light. After reflection demodulation, it is compared with the reference light, and whether vibration is generated according to the changes in waveforms such as phase and amplitude. It can be understood that the components of the optical cable are optical fiber and protective materials, so it is well equipped with the strong perception of the optical fiber to the environment. Because the optical fiber is very sensitive to environmental changes, a certain position on the optical cable is struck to generate vibration, and the properties of the light transmitted in the optical fiber will change. The changed light is reflected back to the phase-sensitive optical time-domain reflection device, and the phase-sensitive optical time-domain reflection device restores the light with changed waveforms such as phase and amplitude to obtain a vibration signal. It can be understood that compared with the transmission speed of vibration in the soil, the transmission speed of light in the optical fiber is more than 5 orders of magnitude ahead, so the phase-sensitive optical time-domain reflection device can quickly detect the vibration signal, and the transmission time of the vibration from the knocking position to the phase-sensitive optical time-domain reflection device can be ignored. Specifically, the phase-sensitive optical time domain reflectometer used in this embodiment can be a distributed optical fiber acoustic wave sensor or a distributed optical fiber vibration sensor. The phase-sensitive optical time domain reflectometer in this embodiment is placed on the side of the machine room to access the optical cable, and can also be placed in other optional areas to access the optical cable, and there is no special requirement for the distance from the area to be measured.

[0058] S120, obtaining second vibration data collected by the seismic detection equipment;

[0059] In this embodiment, the device for collecting ground vibration signals can be a seismic detection device. The device uses the propagation characteristics of seismic waves to collect seismic data and monitor in real time, converts the ground vibration signals caused by seismic waves into electrical signals, and then processes the electrical signals into visual waveforms, and checks the vibration signal through the visual waveforms.

[0060] In this embodiment, the seismic detection device is arranged directly above the optical cable route; wherein, directly above the optical cable route is determined by:

[0061] In the direction intersecting the optical cable route, a plurality of route knocking points are set at a certain distance interval and knocked respectively, and the position of the route knocking point corresponding to the maximum amplitude of the vibration data obtained by the phase-sensitive optical time domain reflection device is directly above the optical cable route.

[0062] Understandably, when constructing today’s optical cables, it is necessary to accurately record relevant data such as the burial depth, and to form a digital layout of the underground construction of the optical cables together with the optical cables constructed in other sections. In this way, when the optical cables need to be inspected in the future, the exact top of the optical cables can be found on the ground through the digital layout. However, there are still some optical cables that were built historically. Due to the immaturity of information technology at the time, it was impossible to form a digital optical cable route. When constructing the optical cables, a marker stake was designed at a certain distance on the ground to mark the vague position of the optical cable route underground. Therefore, the exact position of the top of a certain optical cable route in these historical optical cables cannot be determined, and it is necessary to locate the top of the optical cable route by knocking.

[0063] This application has already determined the direction of the optical cable route in advance through other labels such as markers, and then set multiple route knocking points at certain intervals and knock them separately. The route knocking point position corresponding to the maximum amplitude of the vibration data obtained by the phase-sensitive optical time domain reflectometry device is directly above the optical cable route. It can be understood that vibrations propagate in the soil, and the intensity will be continuously weakened as the transmission distance becomes longer. Therefore, if the knocking point is knocked directly above the optical cable route, the vibration can be transmitted at a vertical distance, and the transmission distance is the shortest, so the vibration intensity is weakened the least, and the amplitude of the vibration data formed after reaching the optical cable is the largest, thereby finding the top of the optical cable route.

[0064] It is understandable that the propagation mode of seismic waves is from the source to all directions, relying on the vibration of the medium to propagate. In this embodiment, the seismic detection equipment is set on the ground directly above the optical cable route, which is convenient for measurement and maintains data accuracy. Figure 2 It can be seen that the distance between the seismic detector and the detection knocking point is directly measured by taking the vertical distance between two points on the ground. It can be understood that a certain ground position at a certain distance from the seismic detector is selected as the detection knocking point for the first knocking, and the first distance L between the two can be measured and recorded. 21 If it is determined according to the comparison results that the position of the detection tapping point needs to be adjusted for the next tapping, similarly, the distance L between the two needs to be measured and recorded. 22 Since the optical fiber cannot be bent greatly and the measurement area is small, the optical cable in the measurement area can be regarded as a straight line to a certain extent. The seismic detector is set on the ground directly above the optical cable route, so that the line connecting the seismic detector and the detection knocking point and the downward projection of its extension line just coincide with the underground optical cable, so L 22 You can measure L at the first 21 Based on the position distance relationship between the two detection knocking points, L 21It is sufficient to increase or decrease the difference, and there is no need to perform long-distance measurement on the seismic detection equipment and the second detection knocking point.

[0065] Wherein, the first vibration data of the phase-sensitive optical time-domain reflectometry device and the second vibration data of the seismic geophone device in step S110 and step S120 are acquired by: performing a first detection knock at a ground position directly above the optical cable route at a certain distance from the seismic geophone device, using the phase-sensitive optical time-domain reflectometry device to acquire a vibration signal formed in the optical cable by the first detection knock to acquire the first vibration data, and using the seismic geophone device to acquire a vibration signal formed on the ground by the first detection knock to acquire the second vibration data;

[0066] Specifically, a first detection tap is performed on the ground position directly above the optical cable route at a certain distance from the seismic detection device, specifically including:

[0067] Performing at least one of the first detection taps at a ground position directly above the optical cable route at a certain distance from the seismic geophone device to generate a detection vibration signal, the phase-sensitive optical time domain reflectometry device acquiring the first vibration data according to the received detection vibration signal, and the seismic geophone device acquiring the second vibration data according to the received detection vibration signal;

[0068] It is understandable that at least one of the first detection knocks is performed at a ground position directly above the optical cable route at a certain distance from the seismic detection device. The detection knocks may be performed once or multiple times, that is:

[0069] Performing a single first detection tapping at a ground position directly above the optical cable route at a certain distance from the seismic detection device, that is, performing a single first detection tapping at the detection tapping point to generate a single vibration signal, the phase-sensitive optical time domain reflectometry device acquiring the first vibration data according to the received single vibration signal, and the seismic detection device acquiring the second vibration data according to the received single vibration signal;

[0070] or,

[0071] The first detection tapping is performed multiple times at a ground position directly above the optical cable route at a certain distance from the seismic detection equipment, that is, the first detection tapping is performed at multiple detection tapping points at certain time intervals to obtain multiple vibration signals, the phase-sensitive optical time domain reflection equipment obtains the first vibration data based on the multiple vibration signals received, and the seismic detection equipment obtains the second vibration data based on the multiple vibration signals received.

[0072] Specifically, the detection knocking point is set on the ground directly above the optical cable route to ensure that the longitudinal distance from the position point corresponding to the detection knocking to the optical cable remains unchanged.

[0073] S130, aligning the first vibration data and the second vibration data;

[0074] In this embodiment, the first vibration data and the second vibration data collected in step S110 and step S120 respectively carry time information, which is generated by a time synchronization module carried by the phase-sensitive optical time domain reflectometer and the seismic detection device. Preferably, the time synchronization module can be set to a GPS module. The GPS module used provides accurate position, speed and time information by receiving and processing satellite signals. This module is mainly used here to provide the time information of the knocking.

[0075] It is understandable that the phase-sensitive optical time-domain reflection device and the seismic detection device are respectively designed with GPS modules, which can identify the vibration data generated by the knocking of this application through the time information generated by their respective GPS, thereby reducing the interference of noise data. Because in the process of knocking, in addition to the vibration of the knocking of this application, there will be many other interfering vibrations on the ground, and these interfering vibrations can also generate noise data in the seismic detection device, so the time information generated by the respective GPS is needed to mark the vibration of the knocking of this application, so as to distinguish the vibration data and noise data required by this application, and facilitate subsequent comparative analysis; furthermore, because the knocking can be performed at the knocking point in two ways, a single knock and multiple knocks, when multiple knocks are used, the two devices will generate multiple vibration data, and the time information generated by the GPS is also needed to mark each vibration data of the two devices one by one.

[0076] Specifically, it is assumed that the time Δt1 required for the vibration generated by the detection knocking point to propagate longitudinally in the soil to the optical cable, the time Δt2 required for the vibration generated by the detection knocking point to propagate laterally in the soil to the seismic detection device, the time point t0 at which the vibration begins to be generated at the detection knocking point, the time point t1 at which the phase-sensitive optical time domain reflection device begins to detect the vibration signal, and the time point t2 at which the seismic detection device begins to detect the vibration signal;

[0077] It is understandable that the time Δt1 for the vibration to propagate longitudinally to the optical cable is the difference between the time point t0 when the vibration starts to occur and the time point t1 when the phase-sensitive optical time domain reflectometry device starts to detect the vibration signal. It is understandable that both t1 and t0 are positive integers, and numerically, t1 is greater than t0, so the mathematical relationship between the three is as follows:

[0078] Δt1=t1-t0

[0079] Similarly, the time Δt2 for the vibration to propagate laterally to the seismic detection device is the difference between the time point t0 when the vibration starts to be generated and the time point t2 when the seismic detection device starts to detect the vibration signal. It can be understood that t2 and t0 are both positive integers, and numerically, t2 is greater than t0, so the mathematical relationship between the three is as follows:

[0080] Δt2=t2-t0

[0081] According to the formulas of Δt1 and Δt2, each detection tap is performed at the same ground position, so the vibration signal starts to be generated at the same time, so the same data t0 is used. It is understandable that the alignment operation of the first vibration data and the second vibration data should align the time point t0 when the vibration starts to be generated in the first vibration data with the time point t0 when the vibration starts to be generated in the second vibration data, so that the first vibration data and the second vibration data share the same time axis, so that the time sequence relationship between the two can be more clearly compared.

[0082] S140, comparing the starting points of the first vibration data and the second vibration data after the alignment processing, and determining the buried depth data of the optical cable according to the comparison result;

[0083] Combination Figure 2 It can be seen from the equipment layout diagram that the device layout orientation 210 provided in the embodiment of the present application can clearly represent the length relationship of the present embodiment. Figure 2 The phase-sensitive optical time-domain reflectometer 211 is placed on one side of the machine room and connected to the optical cable 214; the seismic detector 212 is placed on the ground directly above the optical cable route, and a number of detection knocking points 213 are set on the ground directly above the optical cable route at a certain distance from the seismic detector 212.

[0084] When the knocking point is struck, a vibration signal is generated. The vibration mainly propagates in two directions: one is that the vibration propagates horizontally from the ground to the seismic detection equipment, and the other is that the vibration propagates vertically from the soil to the optical cable. Assume that the longitudinal distance from the knocking point to the optical cable is L1 (not shown in the figure), and the lateral distance from the knocking point to the seismic detection equipment is L2 (not shown in the figure). As can be seen from the figure, L2 can be directly obtained through ground measurement, and L1 is the buried depth distance to be measured.

[0085] Assuming that the speed at which the vibration generated by the detection knocking point propagates longitudinally in the soil to the optical cable is V1, and the speed at which the vibration generated by the detection knocking point propagates transversely in the soil to the seismic detection equipment is V2, combined with the time Δt1 required for the vibration generated by the detection knocking point to propagate longitudinally in the soil to the optical cable and the time Δt2 required for the vibration generated by the detection knocking point to propagate transversely in the soil to the seismic detection equipment, the speed formula can be obtained:

[0086] L1=V1×Δt1

[0087] L2=V2×Δt2

[0088] It is understandable that the vibration generated by the detection knocking point is propagated by the soil. In this embodiment, the vibration is propagated in the soil within a certain range, and the composition of the soil is similar, so it can be considered that V1 and V2 are equal in value, that is:

[0089] V1=V2

[0090] Then the longitudinal distance L1 from the detection striking point to the optical cable is only affected by the time Δt1 required for the vibration to propagate longitudinally to the optical cable, and the lateral distance L2 from the detection striking point to the seismic detection equipment is only affected by the time Δt2 required for the vibration to propagate laterally to the seismic detection equipment.

[0091] Furthermore, because it can be known from the above formulas of Δt1 and Δt2 that the formulas of Δt1 and Δt2 use the same data t0 as the only intermediate quantity, the time Δt1 required for the vibration to propagate longitudinally to the optical cable is only affected by the time point t1 when the phase-sensitive optical time domain reflection device begins to detect the vibration signal, and the time Δt2 required for the vibration to propagate transversely to the seismic detection device is only affected by the time point t2 when the seismic detection device begins to detect the vibration signal. It can be further concluded that the longitudinal distance L1 from the detection knocking point to the optical cable is only affected by the time point t1 when the phase-sensitive optical time domain reflection device begins to detect the vibration signal, and the transverse distance L2 from the detection knocking point to the seismic detection device is only affected by the time point t2 when the seismic detection device begins to detect the vibration signal.

[0092] Therefore, it is only necessary to adjust the time point t1 when the phase-sensitive optical time domain reflection device starts to detect the vibration signal and the time point t2 when the seismic detection device starts to detect the vibration signal to be equal, so that the longitudinal distance L1 from the detection knocking point to the optical cable and the lateral distance L2 from the detection knocking point to the seismic detection device can be adjusted to be equal. L2 can be directly obtained through ground measurement, thereby obtaining L1 and the burial depth data.

[0093] In this embodiment, Figure 5 An example graph after vibration data alignment is provided. It can be understood that the starting point is the starting point where the curve graph begins to deviate from the initial position or to take values ​​in the positive direction of the ordinate or in the negative direction of the ordinate; the size of the waveform amplitude indicates the strength of the vibration signal, and the beginning of the amplitude indicates the beginning of vibration.

[0094] It is understandable that the starting point of the vibration data corresponds to the time point when the vibration reaches the device, that is, the starting point of the first vibration data corresponds to the time point t1 when the phase-sensitive optical time domain reflection device starts to detect the vibration signal, and the starting point of the second vibration data corresponds to the time point t2 when the seismic detection device starts to detect the vibration signal. By judging the time relationship between the starting point of the first vibration data and the starting point of the second vibration data, the relationship between the time point t1 when the phase-sensitive optical time domain reflection device starts to detect the vibration signal and the time point t2 when the seismic detection device starts to detect the vibration signal can be obtained.

[0095] Through the relationship between t1 and t2, the position of the detection tapping point is adjusted so that the starting point of the first vibration data and the starting point of the second vibration data coincide with each other, that is, the time point t1 when the phase-sensitive optical time domain reflection device starts to detect the vibration signal and the time point t2 when the seismic detection device starts to detect the vibration signal are adjusted to be equal.

[0096] In this embodiment, the equivalent relationship between various physical quantities is used to make the intermediate quantities of the two distances equal through adjustment means. There is no need to obtain the specific data of the intermediate quantity, thus avoiding cumbersome calculation procedures. The equivalent relationship between the distance from the detection striking point to the seismic detection equipment and the buried depth of the optical cable is directly used to complete the measurement of the buried depth through simple comparison.

[0097] Therefore, in this embodiment, the key to determining the buried depth of the optical cable is to find a certain detection knocking point so that the starting points of the first vibration data and the second vibration data after the alignment process coincide with each other. If the starting points of the first vibration data and the second vibration data after the alignment process coincide with each other, it is considered that the distance from the detection knocking point to the seismic detection device is the same as the distance from the detection knocking point to the optical cable, and at this time, it can be considered that the distance from the detection knocking point to the seismic detection device is equal to the buried depth of the optical cable.

[0098] Specifically, by comparing the starting points of the first vibration data and the second vibration data after alignment processing, if the two starting points coincide with each other, the distance between the position point corresponding to the first detection and the seismic detection equipment is obtained, and the distance is used as the buried depth data of the optical cable.

[0099] If the starting points of the first vibration data and the second vibration data after the alignment processing do not coincide with each other, then the starting point occurrence time of the first vibration data and the second vibration data after the alignment processing is compared, and the position of the detection tapping point is adjusted according to the starting point occurrence time, thereby adjusting the distance between the detection tapping point and the seismic detection equipment, and performing the second detection tapping according to the adjusted detection tapping point, until a detection tapping point is found so that the comparison result is that there is a coincident starting point in the first vibration data and the second vibration data.

[0100] In this embodiment, adjusting the position of the detection striking point according to the occurrence time of the starting point, thereby adjusting the distance between the detection striking point and the seismic detection device, may specifically include:

[0101] According to the occurrence time of the starting points of the first vibration data and the second vibration data, the time sequence relationship of the starting points on the first vibration data and the second vibration data is obtained, and according to the time sequence relationship, the distance relationship between the position point corresponding to the first detection knocking and the optical cable and the seismic detection equipment is determined, and the position of the detection knocking point is adjusted according to the distance relationship, thereby adjusting the distance from the detection knocking point to the seismic detection equipment, so that the distances from the detection knocking point to the optical cable and the seismic detection equipment are the same.

[0102] Specifically, Figure 3 The time sequence relationship between the starting points of the first vibration data and the second vibration data can be divided into the following situations:

[0103] First, if the starting point of the first vibration data occurs earlier than the starting point of the second vibration data, then the corresponding distance relationship can be determined as follows: the distance from the detection knocking point to the optical cable is smaller than the distance to the seismic detection device, then the detection knocking point position needs to be adjusted to reduce the distance between it and the seismic detection device;

[0104] Second, if the starting point of the first vibration data occurs later than the starting point of the second vibration data, the corresponding distance relationship can be determined as follows: the distance from the detection striking point to the optical cable is greater than the distance to the seismic detection equipment, then the detection striking point position needs to be adjusted to increase the distance between it and the seismic detection equipment.

[0105] It is understandable that the number of tapping times is not fixed. It is determined by analyzing the starting points of the first vibration data and the second vibration data to determine whether it is necessary to adjust the position of the detected tapping point and continue tapping, until a certain detected tapping point is found so that the comparison result is: there are overlapping starting points in the first vibration data and the second vibration data.

[0106] like Figure 5 An integrated waveform image is formed by the aligned first vibration data and the second vibration data, wherein one waveform represents a waveform image formed by vibration data collected by a phase-sensitive optical time-domain reflectometer, and the other waveform represents a waveform image formed by vibration data collected by a seismic detection device.

[0107] according to Figure 5 It can be inferred that in the positive direction of the coordinate setting, the waveform starting point positions of the two devices are as follows: Figure 4 There are three cases shown:

[0108] The starting point of the first vibration data is on the left side of the starting point of the second vibration data.

[0109] This situation indicates that the starting point of the first vibration data occurs earlier than the starting point of the second vibration data. It can be determined that the distance of the vibration generated at the detection knocking point to the optical cable is smaller than the distance to the seismic detection device, so it is necessary to move the detection knocking point so that the detection knocking point is close to the seismic detection device, thereby shortening the distance between the detection knocking point and the seismic detection device, so as to find the detection knocking point position that makes the starting points coincide.

[0110] The starting point of the first vibration data coincides with the starting point of the second vibration data.

[0111] This situation indicates that the starting point occurrence time of the first vibration data is consistent with the starting point occurrence time of the second vibration data. It can be determined that the distance from the vibration generated at the detection knocking point to the optical cable is equal to the distance from the vibration generated at the detection knocking point to the seismic detection device. At this time, the distance from the detection knocking point to the seismic detection device can be used as the buried depth data of the optical cable to complete the measurement.

[0112] The starting point of the first vibration signal is on the right side of the starting point of the second vibration signal.

[0113] This situation indicates that the starting point of the first vibration data occurs later than the starting point of the second vibration data. It can be determined that the distance of the vibration generated at the detection knocking point to the optical cable is greater than the distance to the seismic detection device, so it is necessary to move the detection knocking point so that the detection knocking point is away from the seismic detection device, thereby increasing the distance between the detection knocking point and the seismic detection device, so as to find the detection knocking point position that makes the starting points coincide.

[0114] Based on the same inventive concept, the present application also provides an optical cable buried depth detection system, such as Figure 6 As shown, the optical cable buried depth detection system may include:

[0115] Acquisition module 311, signal processing module 312, comparison module 313. Among them:

[0116] The acquisition module 311 is used to acquire first vibration data of the optical cable acquired by a phase-sensitive optical time domain reflectometer, wherein the phase-sensitive optical time domain reflectometer is inserted into the optical cable, and to acquire second vibration data acquired by a seismic geophone; wherein the first vibration data of the phase-sensitive optical time domain reflectometer and the second vibration data of the seismic geophone are acquired by:

[0117] Perform a first detection knock at a ground position directly above the optical cable route at a certain distance from the seismic geophone device, collect a vibration signal formed in the optical cable by the first detection knock using the phase-sensitive optical time-domain reflectometry device to obtain the first vibration data, and collect a vibration signal formed on the ground by the first detection knock using the seismic geophone device to obtain the second vibration data;

[0118] In this embodiment, the acquisition module 311 can be used to perform Figure 1 As shown in step S110 and step S120, for the specific description of the acquisition module 311, reference may be made to the description of step S110 and step S120.

[0119] The signal processing module 312 is used for aligning the first vibration data and the second vibration data;

[0120] In this embodiment, the signal processing module 312 can be used to perform Figure 1 As shown in step S130 , for a detailed description of the signal processing module 312 , reference may be made to the description of step S130 .

[0121] The comparison module 313 is used to compare the starting points of the first vibration data and the second vibration data after the alignment process, and determine the buried depth data of the optical cable according to the comparison result;

[0122] In this embodiment, the comparison module 313 can be used to perform Figure 1 As shown in step S140, for the detailed description of the comparison module 313, reference may be made to the description of step S140.

[0123] Based on the same inventive concept, this embodiment also provides an electronic device, Figure 7 The structure diagram of the electronic device of this embodiment is shown, which includes a memory 21 and a processor 22. The memory 21 stores computer-readable instructions, and the processor 22 executes the computer-readable instructions to implement the optical cable buried depth detection method of this embodiment.

[0124] Preferably, the electronic device further includes a bus 23 and a communication interface 24 , and the processor 22 , the communication interface 24 and the memory 21 are connected via the bus 23 .

[0125] The memory 21 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 24 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 23 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus 23 may be divided into an address bus, a data bus, a control bus, etc. (not fully drawn in the figure).

[0126] The processor 22 may be an integrated circuit chip with signal processing capability. In the specific implementation process, each step in the above method embodiment may be completed by the hardware integrated logic circuit or software instructions in the processor 22. The above processor 22 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, which may implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor 22 may also be any conventional processor 22, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 21, and the processor 22 reads the information in the memory 21 and completes the steps of the method of the above embodiment in combination with its hardware.

[0127] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor 22, the computer-executable instructions prompt the processor 22 to implement the above-mentioned optical cable buried depth detection method. The specific implementation can be found in the embodiment, which will not be repeated here.

[0128] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0129] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A method for detecting buried depth of optical cable, characterized in that: include: Acquire first vibration data of the optical cable collected by a phase-sensitive optical time-domain reflectometry device, wherein the phase-sensitive optical time-domain reflectometry device is connected to the optical cable; Acquiring second vibration data collected by the seismic geophone device; Performing alignment processing on the first vibration data and the second vibration data, comparing the starting points of the aligned first vibration data and the second vibration data, and determining the buried depth data of the optical cable according to the comparison result; The first vibration data of the phase-sensitive optical time domain reflectometer and the second vibration data of the seismic detector are collected by: A first detection knock is performed at a ground position directly above the optical cable route at a certain distance from the seismic detection equipment, and the phase-sensitive optical time domain reflection equipment is used to collect the vibration signal formed in the optical cable by the first detection knock to obtain the first vibration data, and the seismic detection equipment is used to collect the vibration signal formed on the ground by the first detection knock to obtain the second vibration data.

2. The method for detecting buried depth of optical cable according to claim 1, characterized in that: The optical cable route is determined directly above by: In the direction intersecting the optical cable route, a plurality of route knocking points are set at a certain distance interval and knocked respectively, and the position of the route knocking point corresponding to the maximum amplitude of the vibration data obtained by the phase-sensitive optical time domain reflection device is directly above the optical cable route.

3. The method for detecting buried depth of optical cable according to claim 1, characterized in that: The aligning process of the first vibration data and the second vibration data specifically includes: The first vibration data and the second vibration data are aligned according to the time information to obtain the aligned first vibration data and the second vibration data.

4. A method for detecting buried depth of optical cable according to any one of claims 1 to 3, characterized in that: The step of comparing the starting point of the first vibration data and the second vibration data after the alignment process and determining the buried depth data of the optical cable according to the comparison result specifically includes: Analyze the starting points of the first vibration data and the second vibration data after the alignment processing. If the two starting points coincide with each other, obtain the distance between the position point corresponding to the first detection knocking and the seismic detection equipment, and use the distance as the buried depth data of the optical cable.

5. The method for detecting buried depth of optical cable according to claim 4, characterized in that: The step of comparing the starting point of the first vibration data and the second vibration data after the alignment process, and determining the buried depth data of the optical cable according to the comparison result, further comprises: When the starting points of the first vibration data and the second vibration data after the alignment processing do not coincide with each other, the starting point occurrence time of the first vibration data and the second vibration data after the alignment processing is compared, and the position of the detection tapping point is adjusted according to the starting point occurrence time, thereby adjusting the distance between the detection tapping point and the seismic detection equipment, and performing the second detection tapping according to the adjusted detection tapping point, until a detection tapping point is found so that the comparison result is that there is a coincident starting point in the first vibration data and the second vibration data.

6. The method for detecting buried depth of optical cable according to claim 5, characterized in that: The step of adjusting the position of the detection striking point according to the occurrence time of the starting point, thereby adjusting the distance between the detection striking point and the seismic detection device, specifically includes: According to the occurrence time of the starting points of the first vibration data and the second vibration data, the time sequence relationship of the starting points on the first vibration data and the second vibration data is obtained, and the distance relationship between the position point corresponding to the first detection knocking and the optical cable and the seismic detection equipment is determined according to the time sequence relationship, and the position of the detection knocking point is adjusted according to the distance relationship, thereby adjusting the distance from the detection knocking point to the seismic detection equipment.

7. A method for detecting buried depth of optical cable according to any one of claims 1 to 3, characterized in that: The first detection tapping is performed at a ground position directly above the optical cable route at a certain distance from the seismic detection device, specifically comprising: The first detection knock is performed at least once at a ground position directly above the optical cable route at a certain distance from the seismic detection device to generate a detection vibration signal, and the phase-sensitive optical time domain reflection device obtains the first vibration data based on the received detection vibration signal, and the seismic detection device obtains the second vibration data based on the received detection vibration signal.

8. The method for detecting buried depth of optical cable according to any one of claims 1 to 3, characterized in that: The seismic detection equipment is arranged directly above the optical cable route.

9. An optical cable buried depth detection system, characterized in that: include: An acquisition module is used to acquire first vibration data of an optical cable acquired by a phase-sensitive optical time domain reflectometry device, wherein the phase-sensitive optical time domain reflectometry device is connected to the optical cable, and to acquire second vibration data acquired by a seismic geophone device; wherein the first vibration data of the phase-sensitive optical time domain reflectometry device and the second vibration data of the seismic geophone device are acquired by: Perform a first detection knock at a ground position directly above the optical cable route at a certain distance from the seismic geophone device, collect a vibration signal formed in the optical cable by the first detection knock using the phase-sensitive optical time-domain reflectometry device to obtain the first vibration data, and collect a vibration signal formed on the ground by the first detection knock using the seismic geophone device to obtain the second vibration data; A signal processing module, used for aligning the first vibration data and the second vibration data; The comparison module is used to compare the starting points of the first vibration data and the second vibration data after the alignment process, and determine the buried depth data of the optical cable according to the comparison result.

10. An electronic device comprising a memory and a processor, characterized in that: The memory stores computer-readable instructions, and the processor executes the computer-readable instructions to implement the optical cable buried depth detection method according to any one of claims 1 to 8.

11. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the method for detecting the buried depth of an optical cable as described in any one of claims 1 to 8 is implemented.

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