Device, method and system for detecting oxides in pipeline
By designing an in-pipe oxide detection device with arc-shaped magnetization unit and sensor group, the problem of low detection accuracy of austenitic stainless steel pipes is solved, and higher detection accuracy and smaller error range are achieved.
Patent Information
- Application Number
- CN202311179780.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-13
- Publication Date
- 2025-03-14
AI Technical Summary
Austenitic stainless steel pipes oxidize in high temperature and high pressure environments to form oxide scales, resulting in local blockage of the pipeline and excessive temperature. The existing magnetic detection methods have low accuracy when the pipe wall is magnetic, making it difficult to effectively detect the content of the oxide scale.
An oxide detection device in the pipeline is designed, including a magnetizing unit and a sensor group. The magnetizing unit forms an arc structure from a magnet and a magnetic yoke. The sensor is arranged inside the arc structure. By adjusting the structure of the magnetizing unit and the position of the sensor, it is ensured that the magnetic field passes through the tube wall and forms a "tandem relationship" with the oxide, thereby improving detection accuracy.
The accuracy of measuring oxide content when the pipeline is magnetic is effectively improved, and the absolute error range of the oxide scale blockage area ratio compared to the traditional method is reduced from 138% to 474% to 3.4% to 6.7%.
Smart Images
Figure CN119619267A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of pipeline detection, and in particular to a pipeline internal oxide detection device, a pipeline internal oxide detection method and a pipeline internal oxide detection system. Background Art
[0002] After long-term service in high temperature, high pressure and steam environment, the inner wall of austenitic stainless steel pipe will oxidize and produce oxide scale. Under the induction of boiler start-up and shutdown, the oxide scale on the inner wall is easy to fall off and accumulate in the boiler tube. When the accumulation of oxide scale reaches a certain level, it will cause local blockage of the pipeline and over-high temperature, thus causing unit accidents. Therefore, it is very important to use effective detection methods to regularly conduct quantitative detection of oxide scale in the pipe to ensure the long-term safe operation of the unit.
[0003] As a commonly used non-destructive testing method, magnetic testing has a short testing time and low testing cost. However, austenitic stainless steel pipes may become magnetic during use, which greatly reduces the accuracy of magnetic testing.
[0004] Therefore, it is necessary to propose a new technical solution to solve at least one of the above technical problems. Summary of the invention
[0005] The present invention is proposed to overcome at least one aspect of the technical problems in the prior art.
[0006] According to one aspect of an embodiment of the present invention, a device for detecting oxides in a pipeline is proposed, comprising: a magnetization unit, comprising a magnet and a yoke, wherein the magnet and the yoke together form an arc-shaped structure, and the magnet is located at a first end of the arc-shaped structure; at least two first magnetic sensors are arranged on the inner side of the arc-shaped structure and are closer to the second end of the arc-shaped structure at both ends of the arc-shaped structure.
[0007] According to another aspect of an embodiment of the present invention, a method for detecting oxides in pipelines is proposed. The method is implemented based on the above-mentioned device for detecting oxides in pipelines, and includes the steps of: placing the device for detecting oxides in pipelines around a target pipeline, and obtaining measurement results of the at least two first magnetic sensors; and determining the content of oxides in the target pipeline based on the measurement results of the at least two first magnetic sensors.
[0008] According to another aspect of an embodiment of the present invention, a pipeline oxide detection system is proposed, comprising the above-mentioned pipeline oxide detection device and a computing device, wherein the computing device is suitable for receiving measurement results of at least two first magnetic sensors in the pipeline oxide detection device. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The above and other aspects and features of the present invention will become apparent from the following description of embodiments in conjunction with the accompanying drawings, in which:
[0010] Figure 1 is a schematic diagram of a pipeline oxide detection device according to an embodiment of the present invention;
[0011] Figure 2 is a schematic diagram of a pipeline simulation assembly according to one embodiment of the present invention;
[0012] Figure 3 is a schematic diagram of an inner core according to one embodiment of the present invention;
[0013] Figure 4 Schematic diagram of the oxide content-measurement result mapping relationship according to an embodiment of the present invention.
[0014] In the figure: 10, outer shell; 11, inner core; 12, accommodating part; 13, oxide; 14, bottom groove; 15, bottom block; 16, top groove; 17, top block; 18, shell cover; 31, yoke; 32, first magnetic sensor; 33, magnet; 34, holding part; 35, second magnetic sensor; 300, device for detecting oxides in pipelines. DETAILED DESCRIPTION
[0015] The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.
[0016] An embodiment of the present invention provides a device for detecting oxides in a pipeline.
[0017] Figure 1 Schematic diagram of a pipeline oxide detection device according to an embodiment of the present invention. Figure 1 As shown, the pipeline oxide detection device 300 in this embodiment includes a magnetization unit and a sensor group. The magnetization unit includes a magnet 33 and a yoke 31. The magnet 33 and the yoke 31 together form an arc structure. The magnet 33 is located at the first end of the arc structure (i.e. Figure 1 The sensor group includes at least two first magnetic sensors 32 (located at Figure 1 The first magnetic sensor 32 is disposed on the inner side of the arc structure and is closer to the second end of the arc structure (i.e. Figure 1 middle).
[0018] The magnet 33 is, for example, a permanent magnet. The material of the yoke 31 is, for example, soft iron, A3 steel, or a soft magnetic alloy. The first magnetic sensor 32 is, for example, a Hall sensor. The inner diameter of the arc structure can be configured according to the outer diameter of the pipeline to be tested. It is easy to understand that the inner diameter of the arc structure is slightly larger than the outer diameter of the pipeline to be tested. For pipelines to be tested with different outer diameters, a detection device with an arc structure having a corresponding inner diameter can be used for detection.
[0019] In the existing magnetic detection, the magnetic lines of force passing through the pipe wall and the magnetic lines of force passing through the oxide in the pipe wall are in a "parallel" relationship. When the pipe wall is magnetic, the magnetic field tends to bypass the oxide and pass through the pipe wall (because the path through the pipe wall is shorter), which greatly reduces the magnetic field strength passing through the oxide, thereby affecting the measurement accuracy of the oxide content. In this solution, by configuring the structure of the magnetization unit and the position of the sensor group, the magnetic field measured by the sensor passes through the pipe wall and the magnetic lines of force at the same time, that is, the pipe wall and the oxide form a "series relationship" in the magnetic line trajectory. Even if the pipe wall is magnetic, the magnetic field will not bypass the oxide to propagate, thereby ensuring the magnetic field strength passing through the oxide, thereby ensuring the measurement accuracy of the oxide content in the pipeline.
[0020] Through actual verification, the absolute error value range of the oxide scale blockage area ratio in the traditional magnetic detection scheme is 138% to 474%, and the absolute error value range of the oxide scale blockage area ratio in the detection scheme of the present invention is 3.4% to 6.7%. It can be seen that the pipeline oxide detection scheme of the present invention can effectively improve the measurement accuracy of the oxide content when the pipeline is magnetic.
[0021] In an optional embodiment, if Figure 1 As shown, the yoke 31 includes an arc-shaped shell. A channel is provided inside the arc-shaped shell in the same direction as the arc-shaped shell extends. The magnet 33 is provided in the channel and is located at one end of the channel.
[0022] In an optional embodiment, if Figure 1 As shown, the sensor group also includes a plurality of second magnetic sensors 35 (located at Figure 1 The second magnetic sensor 35 is arranged on the inner side of the arc structure. In an optional embodiment, as Figure 1 As shown, the second sensor 35 is closer to the first end of the arc structure (i.e. Figure 1 In an alternative embodiment, although not shown, the second sensor 35 may be located at the center of the arc-shaped structure.
[0023] In this embodiment, by providing the second magnetic sensor 35, more magnetic field information can be collected, which is beneficial to further improve the accuracy of the measurement result.
[0024] In an optional embodiment, if Figure 1 As shown, the first magnetic sensor 32 and the second magnetic sensor 35 are evenly distributed on the inner side of the arc structure in an equidistant manner. The distance between adjacent magnetic sensors can be determined according to actual conditions. It is easy to understand that the smaller the distance between adjacent magnetic sensors, the more conducive it is to improve the accuracy of the measurement result.
[0025] In an optional embodiment, if Figure 1 As shown, the arc structure is a semicircular arc. In an optional embodiment, although not shown, the arc structure can be a minor arc. By configuring the arc structure as a semicircular arc or a minor arc, it is beneficial for the pipeline oxide detection device 300 to be smoothly placed around the pipeline to be tested and partially surround the pipeline to be tested.
[0026] In an alternative implementation, if Figure 1 As shown, the pipeline internal oxide detection device 300 further includes a holding component 34. The holding component 34 is arranged outside the arc structure, so that the operator can hold the detection device conveniently.
[0027] In an optional embodiment, although not shown, the pipeline oxide detection device 300 further includes a circuit board. The circuit board can be installed in the inner groove provided in the holding component 34, and the circuit board is electrically connected to the sensor group and the computer respectively, for collecting and transmitting data. A switch button can be installed on one side of the holding component 34, and the switch button is electrically connected to the circuit board to control the opening and closing of the sensor group.
[0028] In an optional embodiment, if Figure 1 As shown, the detection device further comprises a pipeline simulation component. The pipeline simulation component is suitable for simulating a pipeline wall and has a receiving portion suitable for accommodating oxides, and the receiving portion is located inside the simulated pipeline wall.
[0029] In this embodiment, the pipeline simulation component is used to simulate the pipeline wall, which can facilitate the calibration of the oxide content in pipelines with different wall thicknesses and can fully cover the detection of pipelines of various outer diameters.
[0030] Figure 2 is a schematic diagram of a pipeline simulation component according to an embodiment of the present invention. Figure 3 is a schematic diagram of an inner core according to an embodiment of the present invention. In an optional embodiment, as Figure 1-Figure 3 As shown, the pipeline simulation component includes an inner core 11 and an outer shell 10 made of non-magnetic materials. The inner core 11 and the outer shell 10 are both cylindrical. A receiving portion 12 is provided on the inner core 11. The receiving portion 12 is suitable for receiving an oxide 13. When the inner core 11 is coaxially placed inside the outer shell 10, a simulated pipeline wall is formed between the outer surface of the inner core 11 and the outer surface of the outer shell 10, and the oxide 13 is located on the inner side of the simulated pipeline wall.
[0031] Exemplarily, the material of the inner core 11 and the outer shell 10 is, for example, organic glass. The oxide 13 is, for example, oxide scale collected from the pipeline to be tested.
[0032] In this embodiment, a simulated pipe wall is formed between the outer surface of the inner core 11 and the outer surface of the outer shell 10. The thickness of the simulated pipe wall can be changed by changing the outer diameter of the inner core 11, which is convenient to adjust and has low cost. In addition, in this embodiment, air (air is also a non-magnetic material) is allowed to exist between the outer surface of the inner core 11 and the outer surface of the outer shell 10, which can further reduce the material required for the simulated pipe wall, thereby further reducing the cost.
[0033] In an optional embodiment, if Figure 2 As shown, the bottom surface and top surface of the inner core 11 are respectively provided with a bottom block 15 and a top block 17 , and the bottom surface and top surface of the inner wall of the outer shell 10 are respectively provided with a bottom groove 14 and a top groove 16 matching with the bottom block 15 and the top block 17 .
[0034] In an optional embodiment, if Figure 2 and Figure 3 As shown, the oxide 13 from the pipe to be tested is filled into the receiving portion 12, the bottom block 15 at the bottom end of the inner core 11 is inserted into the bottom groove 14, and then the shell cover 18 is installed to the top of the outer shell 10, and the top block 17 is inserted into the top groove 16, so that the inner core 11 is stably fixed to the outer shell 10.
[0035] In an alternative embodiment, see Figure 1 After the pipeline simulation component is assembled, the holding part 34 is held by hand so that the sensor group (including the first magnetic sensor 32 and the second magnetic sensor 35) on the yoke 31 is close to one side of the housing 10, and the sensor group is activated by the switch button to detect the oxide 13 filled in the inner core 11. The sensor group transmits the measurement result to the circuit board, and the circuit board transmits the measurement result to the computing device.
[0036] In an optional embodiment, the pipeline simulation component may include multiple inner cores 11 with different outer diameters to simulate pipelines with different wall thicknesses. In an optional embodiment, the pipeline simulation component may include multiple inner cores 11 with the same outer diameter and different cross-sectional areas of the receiving portion 12 to simulate different oxide contents. In an optional embodiment, the pipeline simulation component may include multiple outer shells 10 with different outer diameters to simulate pipelines with different outer diameters.
[0037] In one example, the cross-sectional area ratio of the receiving portion 12 (i.e., the oxide 13) to the inner core 11 is L%, the outer diameter and the wall thickness of the outer shell 10 are N mm and K mm respectively, and the distance between the outer surface of the inner core 11 and the outer surface of the outer shell is S mm. The pipeline simulation component can be tested multiple times by the sensor group, and at least one of the values of N, K, L and S is changed each time to obtain the oxide content-measurement result mapping relationship corresponding to pipelines with different outer diameters and different wall thicknesses (see the following description).
[0038] In an alternative embodiment, N is 38, K is 6, L is 0, and S is 16. In an alternative implementation, N is 45, K is 7.5, L is 10, and S is 23. In an alternative embodiment, N is 54, K is 9, L is 10, and S is 30. In an alternative embodiment, N is 61, K is 10.5, L is 30, and S is 37.
[0039] An embodiment of the present invention also provides a method for detecting oxides in a pipeline.
[0040] The pipeline oxide detection method in this embodiment is implemented based on the above-mentioned pipeline oxide detection device, and includes the following steps:
[0041] Step 1: Place the pipeline oxide detection device around the target pipeline and obtain measurement results of at least two first magnetic sensors.
[0042] Step 2: Determine the content of oxides in the target pipeline according to the measurement results of at least two first magnetic sensors.
[0043] In an optional embodiment, each pipe with a wall thickness has a corresponding oxide content-measurement result mapping relationship. Accordingly, the above step 1 may further include:
[0044] Step 2.1, according to the wall thickness of the target pipeline, determine the oxide content-measurement result mapping relationship corresponding to the target pipeline;
[0045] Step 2.2: Determine the content of oxides in the target pipeline according to the measurement results of at least two first magnetic sensors and the mapping relationship between the oxide content and the measurement results corresponding to the target pipeline.
[0046] In an optional embodiment, the measurement results of at least two first magnetic sensors may be added together to obtain a sum result, and then the content of oxides in the target pipeline may be determined based on the sum result.
[0047] In an optional embodiment, the mapping relationship between the oxide content and the measurement result corresponding to each pipe wall thickness is obtained in the following manner: first, a pipe wall of a preset thickness is simulated using a pipe simulation component, and an oxide sample from a target pipe is placed in the simulated pipe wall with a preset content. Second, an oxide detection device in a pipe is placed around the simulated pipe wall to obtain corresponding measurement results. Finally, based on the measurement results of the simulated pipe wall and the preset content of the oxide, a mapping relationship between the oxide content and the measurement result corresponding to the pipe wall of the preset thickness is obtained.
[0048] In this embodiment, by changing the outer diameter of the inner core and / or the outer diameter of the outer shell, the thickness of the simulated pipe wall can be changed. By changing the cross-sectional area of the receiving portion, the content of the oxide can be changed.
[0049] Figure 4 Schematic diagram of the oxide content-measurement result mapping relationship according to an embodiment of the present invention.
[0050] The measurement result is the sum of the measurement results of each magnetic sensor. Figure 4 In the figure, from top to bottom are the oxide content-measurement result curves corresponding to pipe walls with a wall thickness of 6 mm, 7.9 mm, 9 mm, and 10.5 mm. It can be seen that different wall thicknesses correspond to different oxide content-measurement result mapping relationships, and there is a roughly linear relationship between the oxide content and the measurement result.
[0051] In an optional embodiment, the existing mapping relationship between oxide content of wall thickness and measurement result may be interpolated to obtain more mapping relationships between oxide content of wall thickness and measurement result.
[0052] An embodiment of the present invention also provides a pipeline oxide detection system.
[0053] The above-mentioned pipeline oxide detection system comprises a computing device and the pipeline oxide detection device described above. The computing device is suitable for receiving the measurement results of at least two first magnetic sensors in the pipeline oxide detection device.
[0054] The specific details and technical effects of the pipeline oxide detection and pipeline oxide system in the embodiments of the present invention can be found in the above description of the pipeline oxide device, which will not be repeated here.
[0055] Based on the above, the present invention proposes the following technical solutions:
[0056] 1. A device for detecting oxides in a pipeline, comprising:
[0057] A magnetization unit, comprising a magnet and a yoke, wherein the magnet and the yoke together form an arc-shaped structure, and the magnet is located at a first end of the arc-shaped structure;
[0058] At least two first magnetic sensors are arranged at the inner side of the arc-shaped structure and closer to the second end of the arc-shaped structure among the two ends of the arc-shaped structure.
[0059] 2. The device for detecting oxides in pipelines according to item 1, wherein:
[0060] The yoke comprises an arc-shaped shell, a channel is arranged inside the arc-shaped shell in the same direction as the arc-shaped shell extends, and the magnet is arranged in the channel and located at one end of the channel.
[0061] 3. The pipeline oxide detection device according to item 1, wherein:
[0062] The device further includes at least one second magnetic sensor, which is disposed on the inner side of the arc structure, and the second magnetic sensor is closer to the first end of the arc structure at both ends of the arc structure, or is located at the center of the arc structure.
[0063] 4. The device for detecting oxides in pipelines according to item 1, wherein:
[0064] The at least two first magnetic sensors and the at least one first magnetic sensor are distributed at equal intervals inside the arc structure.
[0065] 5. The pipeline oxide detection device according to item 1, wherein:
[0066] The arc structure is a semicircular arc or a minor arc.
[0067] 6. The pipeline oxide detection device according to item 1, wherein:
[0068] The device further comprises a holding component, and the holding component is arranged on the outer side of the arc structure.
[0069] 7. The pipeline oxide detection device according to any one of 1 to 6, wherein:
[0070] The device further comprises a pipeline simulation component, which is suitable for simulating a pipeline wall and has a receiving portion suitable for receiving an oxide, wherein the receiving portion is located inside the simulated pipeline wall.
[0071] 8. The pipeline oxide detection device according to item 7, wherein:
[0072] The pipeline simulation component includes an inner core and an outer shell made of non-magnetic materials, both of which are cylindrical. The inner core is provided with the accommodating portion, and the inner core is suitable for being coaxially placed inside the outer shell. The outer surface of the inner core and the outer surface of the outer shell are suitable for simulating the pipeline wall.
[0073] 9. The pipeline oxide detection device according to 8, wherein:
[0074] The pipeline simulation component includes a plurality of inner cores with different outer diameters.
[0075] 10. The pipeline oxide detection device according to 8, wherein:
[0076] The pipeline simulation component includes a plurality of inner cores with the same outer diameter and different cross-sectional areas of the receiving parts.
[0077] 11. The pipeline oxide detection device according to 8, wherein:
[0078] The pipeline simulation component includes a plurality of shells with different outer diameters.
[0079] 12. The pipeline oxide detection device according to 8, wherein:
[0080] The bottom surface and top surface of the inner core are respectively provided with a bottom block and a top block, and the bottom surface and top surface of the inner wall of the outer shell are respectively provided with a bottom groove and a top groove matching with the bottom block and the top block.
[0081] 13. A method for detecting oxides in pipelines, based on the pipeline oxide detection device according to any one of claims 1 to 12, comprising the steps of:
[0082] Placing the pipeline oxide detection device around the target pipeline and obtaining measurement results of the at least two first magnetic sensors;
[0083] The content of oxides in the target pipe is determined according to the measurement results of the at least two first magnetic sensors.
[0084] 14. The method according to 13, wherein each pipe wall thickness has a corresponding oxide content-measurement result mapping relationship; and
[0085] Determining the content of oxides in the target pipeline according to the measurement results of the at least two first magnetic sensors includes:
[0086] Determining, according to the wall thickness of the target pipeline, a mapping relationship between the oxide content and the measurement result corresponding to the target pipeline;
[0087] The content of oxides in the target pipeline is determined according to the measurement results of the at least two first magnetic sensors and a mapping relationship between the oxide content and the measurement results corresponding to the target pipeline.
[0088] 15. The method according to 14, wherein the oxide content-measurement result mapping relationship corresponding to each pipe wall thickness is obtained by:
[0089] Using a pipeline simulation component to simulate a pipeline wall of a preset thickness, and placing an oxide sample from the target pipeline in a preset content in the simulated pipeline wall;
[0090] The pipeline oxide detection device is placed around the simulated pipeline wall to obtain corresponding measurement results;
[0091] According to the measurement result of the simulated pipeline wall and the preset content of the oxide, a mapping relationship between the oxide content and the measurement result corresponding to the pipeline wall of the preset thickness is obtained.
[0092] 16. The method according to 13, wherein determining the content of oxides in the target pipe according to the measurement results of the at least two first magnetic sensors comprises:
[0093] Adding the measurement results of the at least two first magnetic sensors to obtain a sum result;
[0094] According to the summed result, the content of oxides in the target pipeline is determined.
[0095] 17. A pipeline oxide detection system, comprising the pipeline oxide detection device according to any one of claims 1 to 12 and a computing device, wherein the computing device is adapted to receive measurement results of at least two first magnetic sensors in the pipeline oxide detection device.
Claims
1. A pipeline internal oxide detection device, comprising: A magnetization unit, comprising a magnet and a yoke, wherein the magnet and the yoke together form an arc-shaped structure, and the magnet is located at a first end of the arc-shaped structure; At least two first magnetic sensors are arranged at the inner side of the arc-shaped structure and closer to the second end of the arc-shaped structure among the two ends of the arc-shaped structure.
2. The pipeline oxide detection device according to claim 1, wherein: The yoke comprises an arc-shaped shell, a channel is arranged inside the arc-shaped shell in the same direction as the arc-shaped shell extends, and the magnet is arranged in the channel and located at one end of the channel.
3. The pipeline internal oxide detection device according to claim 1, wherein: The device further includes at least one second magnetic sensor, which is disposed on the inner side of the arc structure, and the second magnetic sensor is closer to the first end of the arc structure at both ends of the arc structure, or is located at the center of the arc structure.
4. The device for detecting oxides in pipelines according to claim 1, wherein: The at least two first magnetic sensors and the at least one first magnetic sensor are distributed at equal intervals inside the arc structure.
5. The pipeline internal oxide detection device according to claim 1, wherein: The arc structure is a semicircular arc or a minor arc.
6. The pipeline internal oxide detection device according to claim 1, wherein: The device further comprises a holding component, and the holding component is arranged on the outer side of the arc structure.
7. The device for detecting oxides in pipelines according to any one of claims 1 to 6, wherein: The device further comprises a pipeline simulation component, which is suitable for simulating a pipeline wall and has a receiving portion suitable for receiving an oxide, wherein the receiving portion is located inside the simulated pipeline wall.
8. The device for detecting oxides in pipelines according to claim 7, wherein: The pipeline simulation component includes an inner core and an outer shell made of non-magnetic materials, both of which are cylindrical. The inner core is provided with the accommodating portion, and the inner core is suitable for being coaxially placed inside the outer shell. The outer surface of the inner core and the outer surface of the outer shell are suitable for simulating the pipeline wall.
9. The device for detecting oxides in pipelines according to claim 8, wherein: The pipeline simulation component includes a plurality of inner cores with different outer diameters.
10. The device for detecting oxides in pipelines according to claim 8, wherein: The pipeline simulation component includes a plurality of inner cores with the same outer diameter and different cross-sectional areas of the receiving parts.
11. The device for detecting oxides in pipelines according to claim 8, wherein: The pipeline simulation component includes a plurality of shells with different outer diameters.
12. The device for detecting oxides in pipelines according to claim 8, wherein: The bottom surface and top surface of the inner core are respectively provided with a bottom block and a top block, and the bottom surface and top surface of the inner wall of the outer shell are respectively provided with a bottom groove and a top groove matching with the bottom block and the top block.
13. A method for detecting oxides in a pipeline, implemented based on the pipeline oxide detection device according to any one of claims 1 to 12, comprising the steps of: Placing the pipeline oxide detection device around the target pipeline and obtaining measurement results of the at least two first magnetic sensors; The content of oxides in the target pipe is determined according to the measurement results of the at least two first magnetic sensors.
14. The method according to claim 13, wherein: Each pipe wall thickness has a corresponding oxide content-measurement result mapping relationship; as well as Determining the content of oxides in the target pipeline according to the measurement results of the at least two first magnetic sensors includes: Determining, according to the wall thickness of the target pipeline, a mapping relationship between the oxide content and the measurement result corresponding to the target pipeline; The content of oxides in the target pipeline is determined according to the measurement results of the at least two first magnetic sensors and a mapping relationship between the oxide content and the measurement results corresponding to the target pipeline.
15. The method according to claim 14, wherein: The mapping relationship between the oxide content and the measurement result corresponding to each pipe wall thickness is obtained by: Using a pipeline simulation component to simulate a pipeline wall of a preset thickness, and placing an oxide sample from the target pipeline in a preset content in the simulated pipeline wall; The pipeline oxide detection device is placed around the simulated pipeline wall to obtain corresponding measurement results; According to the measurement result of the simulated pipeline wall and the preset content of the oxide, a mapping relationship between the oxide content and the measurement result corresponding to the pipeline wall of the preset thickness is obtained.
16. The method according to claim 13, wherein: Determining the content of oxides in the target pipeline according to the measurement results of the at least two first magnetic sensors includes: Adding the measurement results of the at least two first magnetic sensors to obtain a sum result; According to the summed result, the content of oxides in the target pipeline is determined.
17. A pipeline oxide detection system, comprising the pipeline oxide detection device according to any one of claims 1 to 12 and a computing device, wherein the computing device is adapted to receive measurement results of at least two first magnetic sensors in the pipeline oxide detection device.