Monitoring and evaluating system and method for detecting leakage deformation of pipeline through fusion of optical fiber electromagnetic method

Abstract

The system comprises a to-be-detected pipeline, a soil filling model, a hydraulic pressure applying mechanism, an electromagnetic method line measuring system, a metal probe, a current transmitting mechanism, a voltage stabilization type external power supply, a magnetic probe array, a distributed optical fiber system, a central signal processor and an analysis and storage terminal. The magnetic probe array and the distributed optical fiber system collect data information and transmit the data information to the central signal processor, the central signal processor processes the received data information in real time, and the leakage and deformation states of the pipeline are accurately evaluated through the analysis and storage terminal; the evaluation method comprises the steps of performing parameter score assignment on the deformation, the leakage range, the leakage duration and the temperature of the to-be-detected pipeline, calculating the total score of the safety state of the pipeline, judging the safety state of the to-be-detected pipeline and making a corresponding processing strategy. The method has the advantages of simplicity and convenience in operation, high applicability, high monitoring precision and the like, and has important engineering application value.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline leakage monitoring, and in particular to a monitoring and evaluation system and method for detecting pipeline leakage and deformation by integrating optical fiber electromagnetic method. Background Art

[0002] The safety assessment of pipeline leakage and deformation is of great significance in the operation and maintenance of infrastructure such as municipal pipelines and industrial pipelines. With the acceleration of urbanization and industrial development in my country, the scale of underground pipelines continues to expand, and the problem of pipeline leakage and deformation has become increasingly prominent, directly affecting the safe operation of cities and the stability of industrial production. At present, the safety assessment of pipeline leakage and deformation at home and abroad mainly adopts a single indicator assessment or empirical judgment method, lacking a systematic assessment method, and it is difficult to accurately reflect the actual safety status of the pipeline.

[0003] Existing evaluation methods often consider leakage and deformation as independent factors, ignoring the correlation between the two. The evaluation results are highly subjective and lack a unified quantitative standard. At the same time, traditional evaluation methods do not adequately consider environmental factors and are difficult to fully reflect the actual working environment of the pipeline. In practical applications, due to the lack of a scientific evaluation system, pipeline operation and maintenance personnel find it difficult to accurately judge the safety level of the pipeline and are unable to take appropriate disposal measures in a timely manner, which can easily cause safety hazards. In addition, the selection and weight distribution of evaluation indicators in the existing technology lack a scientific basis, and the evaluation results are difficult to provide effective guidance for pipeline maintenance and emergency repair decisions. Summary of the invention

[0004] Technical problems solved: In view of the technical problems existing in the prior art, the present invention provides a monitoring and evaluation system and method for detecting pipeline leakage and deformation by integrating the optical fiber electromagnetic method, constructs a monitoring and evaluation system for detecting pipeline leakage and deformation, establishes a comprehensive evaluation index system with pipeline deformation, leakage range, duration and ambient temperature as the core, adopts a scientific weight configuration method, quantifies and scores each index, realizes an objective evaluation of the pipeline safety status, and adopts effective processing strategies, thereby providing a scientific, reliable and easy-to-operate pipeline safety status monitoring and evaluation system and method.

[0005] Technical solution: The monitoring and evaluation system for detecting pipeline leakage and deformation by integrating optical fiber electromagnetic method described in the present invention comprises: Pipeline to be tested; A fill model, which is laid along the pipeline to be tested to simulate the geological environment of the underground pipeline and is made of multi-layered mixed soil compacted. The materials of the fill model include but are not limited to sand, clay and loam, and the compaction degree is ≥90%; A hydraulic pressure mechanism, which is applied to the fill model to simulate underground pressure and precisely controls and applies a continuously adjustable pressure of 0 to 20 MPa; An electromagnetic survey line system is arranged on a fill model along the direction of the pipeline to be measured, and uses multiple high-precision multi-channel digital acquisition survey lines arranged at intervals; Metal probes, the metal probes comprising a plurality of metal probes arranged corresponding to the electromagnetic line survey system, the metal probes being vertically inserted into the fill model; A current transmitting mechanism, each of which is electrically connected to the metal probe via a connecting cable; A voltage-stabilized external power supply, the voltage-stabilized external power supply is electrically connected to the current transmitting mechanism; A magnetic probe array, wherein the magnetic probe array is correspondingly distributed on the soil filling model; A distributed optical fiber system, the distributed optical fiber system comprising a plurality of distributed optical fibers evenly distributed on the inner wall of the pipeline to be tested; A central signal processor, which is electrically connected to the magnetic probe array and the distributed optical fiber system, and collects and processes monitoring information data in real time; The analysis and storage terminal is electrically connected to the central signal processor and can store, analyze and visually display data information.

[0006] Preferably, the distance between two adjacent measuring lines is adjustable, and the distance is set to 0.5-2 m; the length of the metal probe is 0.5-3 m.

[0007] Preferably, the output current range of the current transmitting mechanism is 0-100A, and the frequency range is 1-10000Hz; the voltage-stabilized external power supply provides a stable voltage output of 220V±10%.

[0008] Preferably, the measurement accuracy of the magnetic probe array is ±0.01nT; the spatial resolution of the distributed optical fiber system is ≥0.1m, the strain measurement accuracy is ≥1με, and the sampling frequency is ≥100 Hz.

[0009] The present invention also discloses an evaluation method for detecting pipeline leakage and deformation by integrating optical fiber electromagnetic method. The monitoring and evaluation system is adopted. The magnetic probe array and the distributed optical fiber system collect data information and transmit it to the central signal processor through a high-speed data bus. The central signal processor processes the received electromagnetic field data and optical fiber strain data in real time, and accurately evaluates the pipeline leakage and deformation state through an analysis storage terminal. The evaluation method comprises the following steps: Step 1: Use the scoring method to score the deformation, leakage range, leakage duration and temperature of the pipeline to be tested. Assign points to the row parameters and obtain the deformation scores S1 , Leakage range score S 2 , leakage duration score S 3 and temperature score S 4 ; Step 2: Calculate the total score of pipeline safety status S = 0.35 S 1 +0.3 S 2 +0.2 S 3 +0.1 S 4 ; Step 3: Determine the safety status of the pipeline to be tested based on the total score S and make corresponding processing strategies.

[0010] Preferably, the specific scoring method for the deformation of the pipeline to be measured in step 1 is: Deformation ≤3mm, the score is 20; The deformation is 3~8mm, and the score is 40; The deformation is 8~12mm, and the score is 60; The deformation is 12~15mm, and the score is 80; If the deformation is greater than 15 mm, the score is 100.

[0011] Preferably, the specific scoring method for the leakage range of the pipeline to be tested in step 1 is: Leakage range ≤0.2m 2 , the score is 20; The leakage range is 0.2~0.5mm, and the score is 40; The leakage range is 0.5~1mm, and the score is 60; The leakage range is 1~2mm, and the score is 80; If the leakage range is greater than 2 mm, the score is 100.

[0012] Preferably, the specific scoring method for the leakage duration of the pipeline to be tested in step 1 is: If the leakage duration is ≤12h, the score is 20; Leakage duration is 12 to 48 hours, and the score is 40; Leakage duration is 48 to 120 hours, and the score is 60; Leakage duration is 120-240 hours, and the score is 80; If leakage duration is greater than 240 hours, the score is 100.

[0013] Preferably, the specific scoring method for the temperature of the pipeline to be measured in step 1 is: Temperature 12~25℃, the score is 20; Temperature 25~35℃, the score is 40; Temperature 35~45℃, the score is 60; Temperature 45~55℃, the score is 80; If the temperature is greater than 55°C, the score is 100.

[0014] Preferably, the specific evaluation method for the safety status of the pipeline to be tested in step 3 is: The total score S is between 0 and 40, and the pipeline to be tested is in normal condition; When the total score S is between 41 and 60, early warning monitoring of the pipeline to be tested is performed; If the total score S is between 61 and 80, emergency treatment should be performed on the pipeline to be tested; If the total score S is between 81 and 100, emergency repairs should be carried out on the pipeline under test.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. The present invention has established a complete monitoring and evaluation system for pipeline leakage and deformation. The monitoring and evaluation system uses a hydraulic pressure mechanism to apply precise and controllable pressure to the fill model, cooperates with the electromagnetic line measurement system and the distributed optical fiber system to perform all-round monitoring of the pipeline to be measured, and realizes high-precision real-time monitoring of pipeline leakage and deformation status; the central signal processor performs real-time fusion processing of multi-source data, and combines the analysis and storage terminal for intelligent analysis; 2. This evaluation method achieves scientific quantification of pipeline safety status through comprehensive scoring of multi-dimensional indicators, overcomes the limitations of traditional single indicator evaluation methods, and improves the accuracy and reliability of evaluation results; adopts a scientific weight configuration method, reasonably considers the influence weights of factors such as deformation degree, leakage range, duration and ambient temperature, makes the evaluation results more objective and comprehensive, effectively avoids the errors caused by subjective experience judgment, and provides a reliable technical basis for pipeline safety management; 3. This monitoring and evaluation system not only realizes the accurate evaluation of pipeline safety status, but also has the advantages of simple operation and strong applicability, and can provide reliable technical support for pipeline safety management; by establishing a complete monitoring and evaluation system, it significantly improves the accuracy and reliability of pipeline leakage and deformation monitoring, provides a strong guarantee for the safe operation of pipelines, and has important engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the monitoring and evaluation system of the present invention; Figure 2 for Figure 1 Schematic diagram of the distributed optical fiber layout structure ((a) pipeline stereogram; (b) pipeline end view); Figure 3 It is a schematic diagram of the evaluation process of pipeline leakage and deformation in the present invention.

[0017] Figure numerals: 1. Hydraulic pressure mechanism; 2. Filling model; 3. Electromagnetic line measurement system; 4. Metal probe; 5. Pipeline to be measured; 6. Magnetic probe array; 7. Central signal processor; 8. Analysis and storage terminal; 9. Current transmitting mechanism; 10. Voltage-stabilized external power supply; 11. Distributed optical fiber system. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the attached Figures 1 to 3 The technical solutions of the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0019] Example 1: Figure 1~2 As shown, the present invention discloses a monitoring and evaluation system for detecting pipeline leakage and deformation by integrating optical fiber and electromagnetic method. The monitoring and evaluation system includes a pipeline to be tested 5, a fill model 2, a hydraulic pressure mechanism 1, an electromagnetic line measurement system 3, a metal probe 4, a current transmitting mechanism 9, a voltage-stabilized external power supply 10, a magnetic probe array 6, a distributed optical fiber system 11, a central signal processor 7 and an analysis and storage terminal 8.

[0020] The fill model 2 is laid along the pipeline 5 to simulate the geological environment of the underground pipeline, and is made of multi-layered mixed soil compacted. The materials of the fill model 2 include but are not limited to multi-layered mixed soils such as sand, clay and loam. After professional compaction treatment, the compaction degree of the fill model 2 is ≥90%, so as to truly simulate the geological conditions of the underground pipeline.

[0021] The hydraulic pressure mechanism 1 applies a simulated underground pressure to the fill model 2, and accurately controls and applies a continuously adjustable pressure of 0-20 MPa, thereby achieving accurate pressure control of the fill model 2, thereby causing a controllable leakage deformation of the test pipeline 5. In an optional embodiment, the hydraulic pressure mechanism 1 can use a hydraulic drive cylinder and a hydraulic oil station to provide pressure output for the fill model 2.

[0022] The electromagnetic survey line system 3 is arranged on the fill model 2 along the direction of the pipeline 5 to be measured. It adopts multiple high-precision multi-channel digital acquisition survey lines arranged at intervals. The distance between two adjacent survey lines is adjustable, and the distance is set to 0.5~2m; the metal probe 4 includes multiple metal probes arranged corresponding to the electromagnetic survey line system 3. The metal probe 4 is vertically inserted into the fill model 2. The length of the metal probe 4 is 0.5~3m, forming a complete electromagnetic detection network.

[0023] The current transmitting mechanism 9 is electrically connected to the metal probe 4 through a connecting cable, and the voltage-stabilized external power supply 10 is electrically connected to the current transmitting mechanism 9. The output current range of the current transmitting mechanism 9 is 0~100A, and the frequency range is 1~10000Hz. The voltage-stabilized external power supply 10 provides a stable voltage output of 220V±10%. The voltage-stabilized external power supply 10 is used to power the current transmitting mechanism 9, and the power supply output voltage is stable and has strong anti-interference ability. The current transmitting mechanism 9 adopts digital control technology, which can generate excitation signals of various waveforms, and inject them into the fill model 2 through the metal probe 4 array to form a stable electromagnetic field distribution.

[0024] The magnetic probe array 6 is distributed correspondingly on the fill model 2. The measurement accuracy of the magnetic probe array 6 is ±0.01nT. The electromagnetic survey line arranged along the pipeline direction can continuously monitor the changes in the electromagnetic field around the pipeline to be measured 5 through the magnetic probe array 6, and conduct all-round monitoring. The monitoring data is collected in real time and transmitted to the central signal processor 7.

[0025] The distributed optical fiber system 11 includes a plurality of distributed optical fibers evenly distributed on the inner wall of the pipeline 5 to be tested. The spatial resolution of the distributed optical fiber system 11 is ≥ 0.1 m, the strain measurement accuracy is ≥ 1 με, and the sampling frequency is ≥ 100 Hz, and it can monitor the multi-dimensional strain data of the pipeline 5 to be tested in real time. In an optional embodiment, there are four distributed optical fibers arranged along the inner wall of the pipeline 5 to be tested.

[0026] The central signal processor 7 is electrically connected to the magnetic probe array 6 and the distributed optical fiber system 11, respectively, and collects and processes monitoring information data in real time; the analysis and storage terminal 8 is electrically connected to the central signal processor 7, and can store, analyze and visualize data information. In an optional embodiment, the analysis and storage terminal 8 can use a computer system to implement its functions. When the pipeline 5 to be tested leaks and deforms, the electromagnetic line system 3 captures the electromagnetic field anomaly, and the distributed optical fiber system 11 continuously monitors the strain change of the pipeline 5 to be tested at a sampling frequency of not less than 100 Hz. All monitoring data are transmitted to the central signal processor 7 in real time for comprehensive processing and analysis, and analyzed by the computer system, so as to realize a comprehensive and high-precision monitoring and evaluation of the leakage and deformation state of the pipeline 5 to be tested.

[0027] The present invention establishes a complete monitoring and evaluation system for pipeline leakage and deformation. The monitoring and evaluation system adopts a hydraulic pressure mechanism 1 to apply precise and controllable pressure to a fill model 2, and cooperates with an electromagnetic line measurement system 3 and a distributed optical fiber system 11 to perform all-round monitoring of the pipeline 5 to be measured, thereby realizing high-precision real-time monitoring of pipeline leakage and deformation status; multi-source data are processed in real time by a central signal processor 7, and intelligent analysis is performed in combination with an analysis storage terminal 8; the monitoring and evaluation system not only realizes accurate evaluation of the safety status of the pipeline, but also has the advantages of simple operation and strong applicability, and can provide reliable technical support for pipeline safety management; by establishing a complete monitoring and evaluation system, the accuracy and reliability of pipeline leakage and deformation monitoring are significantly improved, providing a strong guarantee for the safe operation of the pipeline, and having important engineering application value.

[0028] Example 2: Figure 3 As shown, the present invention also discloses an evaluation method for detecting pipeline leakage and deformation by integrating optical fiber electromagnetic method. A monitoring and evaluation system is adopted. The magnetic probe array 6 and the distributed optical fiber system 11 collect data information and transmit it to the central signal processor 7 through a high-speed data bus. The central signal processor 7 processes the received electromagnetic field data and optical fiber strain data in real time, and accurately evaluates the pipeline leakage and deformation state through the analysis storage terminal 8. The evaluation method includes the following steps: Step 1: Use the scoring method to score the deformation, leakage range, leakage duration and temperature of the pipeline 5 to be tested. Assign points to the row parameters and obtain the deformation scores S 1 , Leakage range score S 2 , leakage duration score S 3 and temperature score S 4 The specific scoring method for the deformation of the pipe 5 to be tested is: if the deformation is ≤3mm, the scoring value is 20; if the deformation is 3-8mm, the scoring value is 40; if the deformation is 8-12mm, the scoring value is 60; if the deformation is 12-15mm, the scoring value is 80; if the deformation is greater than 15mm, the scoring value is 100.

[0029] The specific scoring method for the leakage range of the pipeline 5 to be tested is: leakage range ≤ 0.2m 2 , the score is 20; the leakage range is 0.2~0.5mm, the score is 40; the leakage range is 0.5~1mm, the score is 60; the leakage range is 1~2mm, the score is 80; the leakage range is >2mm, the score is 100.

[0030] The specific scoring method for the leakage duration of the pipeline 5 to be tested is: if the leakage duration is ≤12h, the score is 20; if the leakage duration is 12-48h, the score is 40; if the leakage duration is 48-120h, the score is 60; if the leakage duration is 120-240h, the score is 80; if the leakage duration is >240h, the score is 100.

[0031] The specific scoring method for the temperature of the pipeline 5 to be tested is: when the temperature is 12~25℃, the scoring value is 20; when the temperature is 25~35℃, the scoring value is 40; when the temperature is 35~45℃, the scoring value is 60; when the temperature is 45~55℃, the scoring value is 80; when the temperature is greater than 55℃, the scoring value is 100.

[0032] Step 2: Calculate the total score of pipeline safety status S = 0.35 S 1 +0.3 S 2 +0.2 S 3 +0.1 S 4 .

[0033] Step 3: Determine the safety status of the pipeline 5 to be tested according to the total score S, and make corresponding treatment strategies. The specific evaluation method for the safety status of the pipeline 5 to be tested is as follows: when the total score S is between 0 and 40, the pipeline 5 to be tested is in a normal state; when the total score S is between 41 and 60, early warning monitoring is performed on the pipeline 5 to be tested; when the total score S is between 61 and 80, emergency treatment is performed on the pipeline 5 to be tested; when the total score S is between 81 and 100, emergency repairs are performed on the pipeline 5 to be tested.

[0034] The evaluation method of the present invention realizes the scientific quantification of the pipeline safety status through the comprehensive scoring of multi-dimensional indicators, overcomes the limitations of the traditional single indicator evaluation method, and improves the accuracy and reliability of the evaluation results; adopts a scientific weight configuration method, reasonably considers the influence weights of factors such as deformation degree, leakage range, duration and ambient temperature, makes the evaluation results more objective and comprehensive, effectively avoids the errors caused by subjective experience judgment, and provides a reliable technical basis for pipeline safety management.

[0035] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A monitoring and evaluation system for detecting pipeline leakage and deformation by combining optical fiber electromagnetic method, characterized in that: The monitoring and evaluation system includes: Pipeline to be tested (5); A fill model (2), wherein the fill model (2) is arranged along the pipeline to be tested (5) to simulate the geological environment of the underground pipeline, and is formed by compacting multiple layers of mixed soil. The material of the fill model (2) includes but is not limited to sand, clay and loam, and the compaction degree thereof is ≥ 90%; A hydraulic pressure mechanism (1), wherein the hydraulic pressure mechanism (1) is applied to the fill model (2) to simulate underground pressure, and precisely controls and applies a continuously adjustable pressure of 0 to 20 MPa; An electromagnetic survey line system (3), wherein the electromagnetic survey line system (3) is arranged on the fill model (2) along the direction of the pipeline (5) to be measured, and uses a plurality of high-precision multi-channel digital acquisition survey lines arranged at intervals; A metal probe (4), the metal probe (4) comprising a plurality of metal probes arranged corresponding to the electromagnetic line survey system (3), the metal probe (4) being vertically inserted into the fill model (2); A current transmitting mechanism (9), wherein the current transmitting mechanism (9) is electrically connected to the metal probe (4) via a connecting cable; A voltage-stabilized external power supply (10), the voltage-stabilized external power supply (10) being electrically connected to the current transmitting mechanism (9); A magnetic probe array (6), wherein the magnetic probe array (6) is correspondingly distributed on the fill model (2); A distributed optical fiber system (11), the distributed optical fiber system (11) comprising a plurality of distributed optical fibers evenly distributed on the inner wall of the pipeline to be tested (5); A central signal processor (7), the central signal processor (7) being electrically connected to the magnetic probe array (6) and the distributed optical fiber system (11) respectively, and collecting and processing monitoring information data in real time; An analysis and storage terminal (8), the analysis and storage terminal (8) being electrically connected to the central signal processor (7), and capable of storing, analyzing and visually displaying data information.

2. The monitoring and evaluation system for detecting pipeline leakage and deformation by combining optical fiber electromagnetic method with detection according to claim 1 is characterized in that: The distance between two adjacent measuring lines is adjustable, and is set to be 0.5-2 m; the length of the metal probe (4) is 0.5-3 m.

3. The monitoring and evaluation system for detecting pipeline leakage and deformation by combining optical fiber electromagnetic method according to claim 1 is characterized in that: The output current range of the current transmitting mechanism (9) is 0-100A, and the frequency range is 1-10000Hz; the voltage-stabilized external power supply (10) provides a stable voltage output of 220V±10%.

4. The monitoring and evaluation system for detecting pipeline leakage and deformation by combining optical fiber electromagnetic method according to claim 1 is characterized in that: The measurement accuracy of the magnetic probe array (6) is ±0.01 nT; the spatial resolution of the distributed optical fiber system (11) is ≥0.1 m, the strain measurement accuracy is ≥1 με, and the sampling frequency is ≥100 Hz.

5. A method for evaluating pipeline leakage and deformation by integrating optical fiber electromagnetic method, characterized in that: A monitoring and evaluation system as claimed in any one of claims 1 to 4 is used, wherein the data information collected by the magnetic probe array (6) and the distributed optical fiber system (11) is transmitted to a central signal processor (7) via a high-speed data bus, the central signal processor (7) processes the received electromagnetic field data and optical fiber strain data in real time, and accurately evaluates the leakage and deformation state of the pipeline through an analysis storage terminal (8); the evaluation method comprises the following steps: Step 1: Use the scoring method to score the deformation, leakage range, leakage duration and temperature of the pipeline (5) to be tested. Parameter scoring is performed to obtain deformation score S1, leakage range score S2, leakage duration score S3 and temperature score S4 respectively; Step 2: Calculate the total score of pipeline safety status S=0.35 S1+0.3 S2+0.2 S3+0.1 S4; Step 3: Determine the safety status of the pipeline to be tested (5) based on the total score S obtained, and make a corresponding processing strategy.

6. The method for evaluating pipeline leakage and deformation by combining optical fiber electromagnetic method with detection according to claim 5 is characterized in that: The specific scoring method for the deformation of the pipeline (5) to be tested in step 1 is: Deformation ≤3mm, the score is 20; The deformation is 3~8mm, and the score is 40; The deformation is 8~12mm, and the score is 60; The deformation is 12~15mm, and the score is 80; If the deformation is greater than 15 mm, the score is 100.

7. The method for evaluating pipeline leakage and deformation detection by combining optical fiber electromagnetic method according to claim 5 is characterized in that: The specific scoring method for the leakage range of the pipeline (5) to be tested in step 1 is: Leakage range ≤0.2m 2 , the score is 20; The leakage range is 0.2~0.5mm, and the score is 40; The leakage range is 0.5~1mm, and the score is 60; The leakage range is 1~2mm, and the score is 80; If the leakage range is greater than 2 mm, the score is 100.

8. The method for evaluating pipeline leakage and deformation by combining optical fiber electromagnetic method with detection according to claim 5 is characterized in that: The specific scoring method for the leakage duration of the pipeline (5) to be tested in step 1 is: If the leakage duration is ≤12h, the score is 20; Leakage duration is 12 to 48 hours, and the score is 40; Leakage duration is 48 to 120 hours, and the score is 60; Leakage duration is 120-240 hours, and the score is 80; If leakage duration is greater than 240 hours, the score is 100.

9. The method for evaluating pipeline leakage and deformation by combining optical fiber electromagnetic method with detection according to claim 5 is characterized in that: The specific scoring method for the temperature of the pipeline (5) to be tested in step 1 is: Temperature 12~25℃, the score is 20; Temperature 25~35℃, the score is 40; Temperature 35~45℃, the score is 60; Temperature 45~55℃, the score is 80; If the temperature is greater than 55°C, the score is 100.

10. The method for evaluating pipeline leakage and deformation by combining optical fiber electromagnetic method with detection according to claim 5, characterized in that: The specific evaluation method for the safety status of the pipeline to be tested (5) in step 3 is: The total score S is between 0 and 40, and the pipeline to be tested (5) is in a normal state; When the total score S is between 41 and 60, early warning monitoring is performed on the pipeline to be tested (5); If the total score S is between 61 and 80, emergency treatment is performed on the pipeline to be tested (5); When the total score S is between 81 and 100, emergency repairs should be carried out on the pipeline to be tested (5).

Images