A buried pipe warning tape-based breakpoint positioning system and method

Abstract

The application discloses a breakpoint positioning system and method based on a buried pipeline warning tape, and relates to the field of breakpoint positioning. Signal data transmitted by the warning tape is acquired by a monitoring extension; the signal data is determined based on a positioning grid sensor signal cable; the signal data is a pass signal or a break signal; a warning tape monitoring station acquires position information of the monitoring extension; when the signal data is the break signal, an equivalent circuit method or an induction coil principle is adopted to determine breakpoint coordinates according to a set layout mode, and breakpoint positioning is performed according to the position information and the breakpoint coordinates. The application can quickly realize breakpoint positioning.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of breakpoint positioning, in particular to a breakpoint positioning system and method based on a buried pipeline warning tape. BACKGROUND

[0002] The warning tape, also known as a marking tape, is widely used in various gas pipelines, oil pipelines, urban water supply and drainage, gas-liquid pipeline transportation systems, power cables, communication optical cables and other transportation systems and confidence transmission systems related to national economy and people's livelihood. Especially for complex urban pipeline construction sites, road construction sites, traffic accident sites, building construction sites and buried pipelines in fields, the warning tape has obvious protective warning effect.

[0003] However, when the warning tape is damaged, how to provide the damaged position and range in the first time to facilitate the pipeline management unit to find the danger in time and stop it, so as to avoid the occurrence of pipeline abnormal damage accidents, is very important and is a problem to be solved at present. SUMMARY

[0004] The purpose of the present application is to provide a breakpoint positioning system and method based on a buried pipeline warning tape, which can quickly realize breakpoint positioning.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] In a first aspect, the present application provides a breakpoint positioning system based on a buried pipeline warning tape, which comprises a warning tape monitoring station, a warning tape and at least one monitoring extension;

[0007] The warning tape comprises a positioning grid sensor signal cable and a double-core flexible wire arranged in a set arrangement; the warning tape is laid on the buried pipeline at a set position;

[0008] The monitoring extension is connected with the warning tape; the warning tape monitoring station is connected with the monitoring extension;

[0009] The monitoring extension is used to acquire signal data transmitted by the warning tape; the signal data is determined based on the positioning grid sensor signal cable; the signal data is a pass signal or a break signal;

[0010] The warning tape monitoring station is used to:

[0011] Acquire position information of the monitoring extension;

[0012] When the signal data is a break signal, an equivalent circuit method or an induction coil principle is adopted to determine the breakpoint coordinates according to the set arrangement;

[0013] The breakpoint is positioned according to the position information and the breakpoint coordinate.

[0014] Optionally, the warning tape adopts a square network structure.

[0015] The double-core flexible wire includes a positioning grid transverse cable and a positioning grid longitudinal cable.

[0016] The positioning grid transverse cable and the positioning grid longitudinal cable are reciprocally bent and woven at a set span to obtain a square network.

[0017] The end of the double-core flexible wire in the square network is connected to the positioning grid sensor signal cable.

[0018] Optionally, the warning tape adopts a central axis symmetrical structure.

[0019] The positioning grid sensor signal cable is arranged at a preset reference axis; the double-core flexible wire is symmetrically distributed based on a central axis to obtain a first wire assembly and a second wire assembly; the central axis is a perpendicular line obtained based on a midpoint of the preset reference axis to another axis parallel to the preset reference axis.

[0020] For the first wire assembly, the double-core flexible wires parallel to each other are arranged in a sequentially increasing manner at a set length from the preset reference axis to the other axis.

[0021] Optionally, the set length is 10 meters.

[0022] Optionally, the breakpoint positioning system based on the buried pipeline warning tape further includes a monitoring signal main cable.

[0023] The warning tape is connected to the monitoring extension through the monitoring signal main cable.

[0024] The warning tape monitoring station is connected to the monitoring extension through the monitoring signal main cable.

[0025] In a second aspect, the application provides a breakpoint positioning method based on a buried pipeline warning tape, which is implemented by using the breakpoint positioning system based on the buried pipeline warning tape.

[0026] Information data is acquired; the information data includes signal data transmitted by the warning tape and position information of the monitoring extension; the signal data is determined based on the positioning grid sensor signal cable in the warning tape; and the signal data is a pass signal or a break signal.

[0027] When the signal data is a break signal, an equivalent circuit method or an induction coil principle is adopted to determine the break point coordinates according to the set arrangement mode of the double-core flexible wire;

[0028] The break point is located according to the position information and the break point coordinates.

[0029] Optionally, the equivalent circuit method includes a parallel resistance method and a switch round method.

[0030] Optionally, the process of determining the break point coordinates by the parallel resistance method specifically includes:

[0031] When the warning belt adopts a square network structure, the resistance value corresponding to the double-core flexible wire is determined according to Ohm's law;

[0032] The signal collection coordinate matrix is determined according to the resistance value and parameter data of the warning belt; the parameter data includes length, width and grid length of the square network structure.

[0033] The break point coordinates are determined according to the signal collection coordinate matrix.

[0034] Optionally, the process of determining the break point coordinates by the switch round method specifically includes:

[0035] When the warning belt adopts a square network structure, the double-core flexible wire is detected and tested based on the on-off control switch of the peripheral device to obtain a test result; the test result includes a conduction state.

[0036] The test collection coordinate matrix is determined according to the test result and the parameter data.

[0037] The break point coordinates are determined according to the test collection coordinate matrix.

[0038] Optionally, the process of determining the break point coordinates by the induction coil principle specifically includes:

[0039] When the warning belt adopts a central axis symmetrical structure, the vector magnetic potential is determined based on electromagnetic field theory.

[0040] The induced electric field is determined according to the vector magnetic potential based on Faraday's law of electromagnetic induction.

[0041] The scalar electric potential is determined according to the induced electric field.

[0042] The electric potential coordinate matrix is determined according to the scalar electric potential and the parameter data.

[0043] The break point coordinates are determined according to the electric potential coordinate matrix.

[0044] According to the specific embodiments provided in the application, the following technical effects are disclosed:

[0045] The application provides a break point positioning system and method based on a buried pipeline warning tape, signal data transmitted by the warning tape is acquired by a monitoring extension; position information of the monitoring extension is acquired by a warning tape monitoring station; when the signal data is a break signal, an equivalent circuit method or an inductor coil principle is adopted to determine break point coordinates according to a set layout mode, and break point positioning is performed according to the position information and the break point coordinates. The application can provide the position and range of the breakage in the first time, so as to facilitate the pipeline management unit to find the danger in time and stop it, and avoid the occurrence of pipeline abnormal damage accidents. Therefore, the application can quickly realize break point positioning. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0047] Figure 1 FIG. 1 is a structural diagram of a break point positioning system based on a buried pipeline warning tape according to the present application;

[0048] Figure 2 FIG. 2 is a schematic diagram of a warning tape in a square network structure;

[0049] Figure 3 FIG. 3 is a schematic diagram of a warning tape in a central axis symmetry structure;

[0050] Figure 4 FIG. 4 is a schematic diagram of a warning tape composition structure;

[0051] Figure 5 FIG. 5 is a schematic diagram of a monitoring extension composition structure;

[0052] Figure 6 FIG. 6 is a schematic diagram of a monitoring extension internal composition structure;

[0053] Figure 7 FIG. 7 is a schematic diagram of a monitoring signal main cable connection structure;

[0054] Figure 8 FIG. 8 is a schematic diagram of a break point position;

[0055] Figure 9 FIG. 9 is a schematic diagram of an equivalent circuit;

[0056] Figure 10 FIG. 10 is a schematic diagram of a double-core flexible wire frame;

[0057] Figure 11 FIG. 11 is a schematic diagram of an equivalent circuit corresponding to a switch wheel patrol method.

[0058] The figure mark: warning tape monitoring station-1, warning tape-2, buried pipeline-3, pipeline peripheral soil-4, monitoring extension-5, monitoring signal main cable-6, warning tape signal lead-201, square grid network-202, waterproof signal connector-203, warning tape upper layer film-204, warning tape lower layer film-205, monitoring extension upstream connector-501, monitoring extension downstream connector-502, station signal connector-503, waterproof extension shell-504, monitoring extension mainboard-505, extension main monitoring function module-506, monitoring extension upstream wiring terminal-507, monitoring extension downstream wiring terminal-508, monitoring extension station signal wiring terminal-509, upstream signal connector-601, downstream signal connector-602. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0060] The above purposes, features and advantages of the present application can be more obvious and easy to understand. The present application will be further described in detail below with reference to the drawings and specific embodiments.

[0061] As shown in the drawings, Figure 1 The embodiments of the present application provide a breakpoint positioning system based on buried pipeline warning tape. The breakpoint positioning system based on buried pipeline warning tape comprises a warning tape monitoring station 1, a warning tape 2 and at least one monitoring extension 5.

[0062] The warning tape 2 comprises a positioning grid sensor signal cable and a double-core flexible lead wire arranged in a set arrangement. The warning tape 2 is laid at a set position above the buried pipeline 3. In actual application, the warning tape 2 is laid after a certain thickness of pipeline peripheral soil 4 is backfilled on the buried pipeline 3.

[0063] The monitoring extension 5 is connected with the warning tape 2. The warning tape monitoring station 1 is connected with the monitoring extension 5. The monitoring extension 5 is used to obtain signal data transmitted by the warning tape 2. The signal data is determined based on the positioning grid sensor signal cable. The signal data is a pass signal or a break signal.

[0064] The warning tape monitoring station 1 is used to obtain position information of the monitoring extension 5. When the signal data is a break signal, an equivalent circuit method or an induction coil principle is adopted to determine the breakpoint coordinates according to the set arrangement.

[0065] The warning tape monitoring station 1 is also used to perform breakpoint positioning according to the position information and the breakpoint.

[0066] In an embodiment, the warning tape 2 adopts a square grid network structure; wherein the double-core flexible wires include: positioning grid transverse cables and positioning grid longitudinal cables.

[0067] The positioning grid transverse cables and the positioning grid longitudinal cables are reciprocally bent and woven with a set span to obtain a square grid network; the ends of the double-core flexible wires in the square grid network are connected to the positioning grid sensor signal cables. A schematic diagram of the warning tape with the square grid network structure is shown in Figure 2 .

[0068] The monitoring signal network in the warning tape 2 is woven by double-core flexible wires in two horizontal and vertical directions, and the two cores of the end of each double-core flexible wire are connected to form a loop; the starting ends of the double-core flexible wires in the two horizontal and vertical directions are connected to the intelligent warning tape signal lead wire through the positioning grid sensor signal cables; specifically, the double-core flexible wires in the two horizontal and vertical directions of the positioning grid longitudinal cables and the positioning grid transverse cables are reciprocally bent and woven into a square grid network in the form of “Z” and “N” with a set span, and each square grid line contains double-core flexible wires in the two horizontal and vertical directions, except for the edges.

[0069] In an embodiment, the warning tape 2 adopts a central axis symmetric structure; wherein the positioning grid sensor signal cables are arranged at a preset reference axis; the double-core flexible wires are symmetrically distributed based on the central axis to obtain a first wire assembly and a second wire assembly; the central axis is a perpendicular line drawn from the midpoint of the preset reference axis to another axis parallel to the preset reference axis. A schematic diagram of the warning tape with the central axis symmetric structure is shown in Figure 3 .

[0070] For the first wire assembly, the double-core flexible wires parallel to each other are arranged in a sequentially increasing manner with a set length from the preset reference axis to the other axis. The set length can be 10 meters, and the length can be adjusted according to actual needs.

[0071] The breakpoint positioning system based on the buried pipeline warning tape further includes: a monitoring signal main cable 6; the warning tape 2 is connected to the monitoring extension 5 through the monitoring signal main cable 6; and the warning tape monitoring station 1 is connected to the monitoring extension 5 through the monitoring signal main cable 6.

[0072] As shown in Figure 4As shown, in practical applications, the warning tape includes an intelligent warning tape signal lead 201, a flexible wire braided mesh (a grid-like network 202 made of double-core flexible wires), and a waterproof signal connector 203. The flexible wire braided mesh is also made by woven flexible insulated wires and PE or other braiding materials together in a crisscross pattern. The flexible wire braided mesh is located between the upper covering 204 and the lower covering 205 of the warning tape, bonded together to form a waterproof warning tape. Its width can be set from 15cm to 80cm, and its length varies from 5 to 200m, depending on actual needs.

[0073] like Figure 5 As shown, the monitoring unit includes an upstream connector 501, a downstream connector 502, a local signal connector 503, and a waterproof housing 504. The upstream connector 501 connects to the upstream monitoring unit or the warning tape monitoring station 1, and the downstream connector 502 connects to the downstream monitoring unit. When there is no downstream monitoring unit, a waterproof plug is installed to seal it.

[0074] like Figure 6 As shown, the monitoring sub-unit main board 505 is equipped with a main monitoring function module 506, an upstream terminal block 507, a downstream terminal block 508, and a local signal terminal block 509. The upstream terminal block 507 and the downstream terminal block 508 are communication and power supply interfaces, respectively connected to the main monitoring cable through the upstream connector 501 and the downstream connector 502. The local signal terminal block 509 is a multi-core terminal block, with one end connected to the main monitoring function module and the other end connected to the intelligent warning tape through the local signal connector, realizing the monitoring of the continuity of each flexible wire in the intelligent warning tape.

[0075] like Figure 7 As shown, the monitoring signal main cable 6 includes an armored main cable and upstream signal connector 601 and downstream signal connector 602 connected to its two ends.

[0076] This application provides a method for locating breakpoints based on warning tape for underground pipelines. This method employs a breakpoint location system based on warning tape for underground pipelines. The breakpoint location method based on warning tape for underground pipelines includes:

[0077] Step 100: Acquire information data. The information data includes: signal data transmitted by the warning tape and the location information of the monitoring unit; the signal data is determined based on the signal cable of the positioning grid sensor in the warning tape; the signal data is either a closed circuit signal or a closed circuit signal.

[0078] Step 200: When the signal data is an open circuit signal, the coordinates of the break point are determined by using the equivalent circuit method or the principle of induction coil, based on the layout of the double-core flexible conductor.

[0079] Step 300: Breakpoint positioning according to position information and breakpoint coordinates.

[0080] The equivalent circuit method includes a parallel resistance method and a switch round method.

[0081] The process of determining the breakpoint coordinates by the parallel resistance method specifically includes:

[0082] When the warning tape adopts a square network structure, the resistance value corresponding to the double-core flexible conductor is determined according to Ohm's law; the signal acquisition coordinate matrix is determined according to the resistance value and the parameter data of the warning tape; the parameter data includes length, width and grid length of the square network structure.

[0083] The breakpoint coordinates are determined according to the signal acquisition coordinate matrix.

[0084] The process of determining the breakpoint coordinates by the switch round method specifically includes:

[0085] When the warning tape adopts a square network structure, the double-core flexible conductor is detected and tested based on the on-off control switch of the peripheral device to obtain a test result; the test result includes a conduction state.

[0086] The test acquisition coordinate matrix is determined according to the test result and the parameter data; the breakpoint coordinates are determined according to the test acquisition coordinate matrix.

[0087] In actual application, because the double-core flexible conductor is soft in material, it will break when encountering external force pulling, causing the circuit to be disconnected. Because each square edge line contains double-core flexible conductors in two directions, the breaking point will cause the disconnection of two double-core flexible conductors in two directions. According to the record of the cable in two directions, the point coordinates of the damaged part can be quickly generated through the number of the broken cable, so as to locate the geographical position of the event occurrence combined with the on-site construction record.

[0088] As shown in the broken point in Figure 8 , it corresponds to two double-core flexible conductors corresponding to X3 and Y4, so its coordinates can be positioned by X3 and Y4.

[0089] Parallel resistance method:

[0090] First, connect the double-core flexible conductor as a conductor to the parallel resistance network, and each conductor corresponds to a resistance. When the conductor is connected, the parallel circuit branch where the corresponding resistance is located is valid. When the double-core flexible conductor breaks, the corresponding circuit branch is disconnected. The specific parallel circuit resistance value calculation can be equivalent to Figure 9 .

[0091] When multiple resistances R1-Rn are connected in parallel, according to Ohm's law, the following calculation can be made:

[0092]

[0093] For the convenience of identification, it is provided that the resistance value when the corresponding double-core flexible conductor is broken is the variable identified by the corresponding cable number, such as X1, X2, …, Xn corresponding to the resistance value to the number A1~An, Y1, Y2, …, Yn corresponding to the resistance value to the number B1~Bn, so when there are only 4 double-core flexible conductors, the identification value of each resistance is as follows:

[0094]

[0095]

[0096] According to the above algorithm, the number of the double-core flexible conductor that appears to be broken can be quickly obtained by the acquisition instrument, and the specific position thereof can be obtained according to the following algorithm.

[0097] According to the parameter data of the intelligent warning tape, that is, the parameter data, the side length value of the horizontal and vertical double-core flexible conductor square can be obtained, and the value is also the maximum resolution of positioning. For the convenience of description, the midpoint of each square frame is taken as the reference point, as shown in Figure 10 The overlapping frame of the horizontal and vertical double-core flexible conductor can be combined with two conductor numbers to form a pair of data combinations that ensure the coordinates, such as the coordinates of the overlapping frame of X3 and Y4 can be recorded as (A3, B4) by resistance identification value.

[0098] According to the size data of the intelligent warning tape, the coordinates matrix of each identification point with 0.5 times the side length of the square can be obtained as follows. When a damage alarm occurs, the system can quickly locate by looking up the table.

[0099] (0.5, 0.5) (A1, 0.5) (1.5, 0.5) (A2, B1) (2.5, 0.5) (A3, 0.5) (3.5, 0.5) (A4, B4) (4.5, 0.5)

[0100] (A1, B1) (1, 1) (A2, B1) (2, 1) (A3, B1) (3, 1) (A4, B1) (4, 1) (4.5, B1)

[0101] (0.5, 1.5) (A1, B1) (1.5, 1.5) (A2, B2) (2.5, 1.5) (A3, B1) (3.5, 1.5) (A4, B4) (4.5, 1.5)

[0102] (0.5, B2) (1, 2) (A1, B2) (2, 2) (A2, B2) (3, 2) (A3, B2) (4, 2) (A4, B2)

[0103] (0.5, 2.5) (A1, B2) (1.5, 2.5) (A2, B3) (2.5, 2.5) (A3, B2) (3.5, 2.5) (A4, B4) (4.5, 2.5)

[0104] (A1, B3) (1, 3) (A2, B3) (2, 3) (A3, B3) (3, 3) (A4, B3) (4, 3) (4.5, B3)

[0105] (0.5, 3.5) (A1, B3) (1.5, 3.5) (A2, B4) (2.5, 3.5) (A3, B3) (3.5, 3.5) (A4, B4) (4.5, 3.5)

[0106] (0.5, B4) (1, 4) (A1, B4) (2, 4) (A2, B4) (3, 4) (A3, B4) (4, 4) (A4, B4)

[0107] (0.5, 4.5) (A1, B4) (1.5, 4.5) (A2, 4.5) (2.5, 4.5) (A3, B4) (3.5, 4.5) (A4, 4.5) (4.5, 4.5)

[0108] In a specific implementation, only the positions represented by the horizontal and vertical guide lines can be identified, so according to the grid horizontal and vertical guide line relationship shown in FIG. 4, a possible broken identification point coordinate matrix can be obtained. When a broken alarm value is monitored, the table can be directly looked up to realize positioning. Figure 10

[0109] Switch wheel patrol method:

[0110] In order to detect the conduction state of each horizontal and vertical guide line, one pass-through control switch is arranged for each horizontal and vertical guide line. When the detection is implemented, the control switches of the corresponding pass-throughs are closed one by one to detect the conduction state.

[0111] As shown in FIG. 5, when a fracture occurs, the identification number of the pass-through is recorded. For example, X1, X2, …, Xn correspond to identification numbers A1-An respectively, and Y1, Y2, …, Yn correspond to identification numbers B1-Bn respectively. Figure 11 The process of determining the breakpoint coordinates by using the induction coil principle specifically includes:

[0112] When the warning belt adopts the central axis symmetrical structure, the vector magnetic potential is determined based on the electromagnetic field theory; the induction electric field is determined based on the Faraday's law of electromagnetic induction according to the vector magnetic potential; the scalar potential is determined according to the induction electric field; the potential coordinate matrix is determined according to the scalar potential and the parameter data; and the breakpoint coordinates are determined according to the potential coordinate matrix.

[0113]

[0114] ​​Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, it should be understood that the application encompasses all possible combinations of the technical features unless such a combination is not technically possible.

[0115] The principles and implementation manners of the present application are described herein by using specific examples, and the above embodiments are only used to help understand the method of the present application and its core idea; meanwhile, according to the idea of the present application, a person skilled in the art can make changes in specific implementation manners and application scopes. In conclusion, the content of the present specification should not be understood as a limitation of the present application.

Claims

1. A breakpoint location system based on warning tape for underground pipelines, characterized in that, The breakpoint location system based on underground pipeline warning tape includes: a warning tape monitoring station, a warning tape, and at least one monitoring unit; The warning tape includes a positioning grid sensor signal cable and a double-core flexible wire laid out according to a set layout method; the warning tape is laid at a set position above the buried pipeline; The monitoring unit is connected to the warning tape; the warning tape monitoring station is connected to the monitoring unit. The monitoring unit is used to acquire the signal data transmitted by the warning tape; the signal data is determined based on the signal cable of the positioning grid sensor; the signal data is either a closed circuit signal or a closed circuit signal. The warning tape monitoring station is used for: Obtain the location information of the monitoring unit; When the signal data is a circuit breaker signal, the equivalent circuit method or the principle of induction coil is used to determine the coordinates of the break point according to the set layout method. The breakpoint is located based on the location information and the breakpoint coordinates.

2. The breakpoint positioning system based on underground pipeline warning tape according to claim 1, characterized in that, The warning tape uses a grid-like network structure; The dual-core flexible conductor includes: a horizontal cable for the positioning grid and a vertical cable for the positioning grid; The horizontal and vertical cables of the positioning grid are repeatedly bent and woven at a set span to obtain a grid-like network. The ends of the dual-core flexible wires in the grid network are connected to the signal cable of the positioning grid sensor.

3. The breakpoint positioning system based on underground pipeline warning tape according to claim 1, characterized in that, The warning tape adopts a central axis symmetrical structure; The positioning grid sensor signal cable is located at a preset reference axis; the dual-core flexible wires are symmetrically distributed based on the central axis to form a first wire assembly and a second wire assembly; the central axis is obtained by drawing a perpendicular line from the midpoint of the preset reference axis to another axis parallel to the preset reference axis. For the first conductor assembly, from the preset reference axis to another axis, the two-core flexible conductors that are parallel to each other are arranged in a manner that increases sequentially according to a set length.

4. The breakpoint positioning system based on underground pipeline warning tape according to claim 3, characterized in that, The set length is 10 meters.

5. The breakpoint positioning system based on underground pipeline warning tape according to claim 1, characterized in that, The breakpoint location system based on the underground pipeline warning tape also includes: a main monitoring signal cable; The warning strip is connected to the monitoring sub-unit via the main monitoring signal cable; The warning tape monitoring station is connected to the monitoring sub-unit via the main monitoring signal cable.

6. A method for locating breakpoints based on warning tapes for buried pipelines, characterized in that, The method for locating the breakpoint of a buried pipeline based on a warning tape is implemented using the breakpoint location system based on a warning tape of a buried pipeline as described in any one of claims 1-5. The method for locating breakpoints based on warning tapes for underground pipelines includes: Acquire information data; the information data includes: signal data transmitted by the warning tape and location information of the monitoring unit; the signal data is determined based on the positioning grid sensor signal cable in the warning tape; the signal data is: a circuit signal or a circuit break signal; When the signal data is an open circuit signal, the equivalent circuit method or the principle of induction coil is used to determine the coordinates of the break point according to the setting and layout of the double-core flexible conductor. The breakpoint is located based on the location information and the breakpoint coordinates.

7. The method for locating breakpoints based on warning tape for buried pipelines according to claim 6, characterized in that, The equivalent circuit methods include: the parallel resistance method and the switch polling method.

8. The method for locating breakpoints based on warning tape for underground pipelines according to claim 7, characterized in that, The process of determining the coordinates of the breakpoint using the parallel resistance method specifically includes: When the warning tape adopts a grid structure, the resistance value corresponding to the dual-core flexible wire is determined according to Ohm's law. Based on the resistance value and the parameter data of the warning strip, a signal acquisition coordinate matrix is ​​determined; the parameter data includes: length, width, and the grid side length of the square network structure; The coordinates of the breakpoint are determined based on the signal acquisition coordinate matrix.

9. The method for locating breakpoints based on warning tapes for underground pipelines according to claim 8, characterized in that, The process of determining the coordinates of the breakpoint using the switch-and-go polling method specifically includes: When the warning tape adopts a grid-like network structure, the dual-core flexible wire is tested based on the on / off control switch of the external device to obtain the test results; the test results include the continuity status. Based on the test results and the parameter data, determine the test acquisition coordinate matrix; Based on the test-collected coordinate matrix, determine the breakpoint coordinates.

10. The method for locating breakpoints based on warning tape for underground pipelines according to claim 8, characterized in that, The process of determining the coordinates of a breakpoint using the principle of induction coils specifically includes: When the warning tape adopts a central axis symmetric structure, the vector magnetic potential is determined based on electromagnetic field theory; Based on Faraday's law of electromagnetic induction, the induced electric field is determined according to the vector magnetic potential; Determine the scalar potential based on the induced electric field; Determine the potential coordinate matrix based on the scalar potential and the parameter data; The coordinates of the breakpoint are determined based on the potential coordinate matrix.

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