Slurry pipeline wall thickness detection and energy dissipation system and method

Abstract

The invention discloses a slurry pipeline wall thickness detection and energy dissipation system which comprises a host, a probe module, a support, a temperature compensation sensor, an energy dissipation pore plate and a pressure-bearing shell. An energy dissipation pore plate through which slurry can pass is embedded in the circular hole channel of the pressure-bearing shell; a through mounting hole is formed in the pipe wall on one side of the pressure-bearing shell; the bracket is erected in the mounting hole, and the probe module is mounted on the bracket; the temperature compensation sensor is integrated inside or near the probe module; the host is connected with the probe module and the temperature compensation sensor in a wired or wireless mode, the host dynamically calculates the sound velocity according to the temperature interval by means of sound velocity temperature segmentation fitting, and meanwhile, the wall thickness of the energy dissipation pore plate is detected through electromagnetic coil impedance compensation temperature correction. The purpose of pipeline energy dissipation can be achieved, and the thickness of the energy dissipation pore plate can be detected in real time; the influence of temperature on sound velocity and electromagnetic characteristics is corrected in a wide temperature range, and the temperature adaptability and precision of wall thickness detection are improved.

Description

Technical Field

[0001] This invention belongs to the field of slurry pipeline equipment technology, specifically relating to a slurry pipeline wall thickness detection and energy dissipation system and method. Background Technology

[0002] Slurry pipeline transportation technology is a high-efficiency transportation technology for solid materials with water as the core carrier. Solid materials are processed into particles with particle size distribution that meet the transportation requirements through grinding equipment. Then, a certain amount of water is added to the pre-treated solid particles and they are fully mixed by stirring equipment (such as stirring tanks, mixers, etc.) to prepare a slurry with stable concentration. Then, pipelines and pressurization equipment are used to achieve long-distance and continuous transportation. It is widely used in industries such as mining, coal, and power that require large-scale transportation of solid materials.

[0003] During the outdoor transportation of slurry, the laying of pipelines may involve large or steep drops due to terrain factors. These drops will cause the slurry inside the pipeline to form an accelerated flow, which will cause severe wear on the inner wall of the pipeline, thereby shortening the service life of the pipeline.

[0004] On the other hand, in order to ensure the stable operation of the entire pipeline transportation system, energy dissipation stations must be installed at the end of the large drop pipe section to control the impact of accelerated flow. The energy dissipation station mainly includes key devices such as energy dissipation orifice plates and pressure-bearing shells; when the accelerated flow of pipeline slurry passes through the energy dissipation orifice plate, it will also cause wear to the inside of the energy dissipation orifice plate; therefore, the wall thickness detection of the energy dissipation orifice plate is of great significance for slurry pipeline transportation.

[0005] Some technologies attempt to integrate energy dissipation and detection functions, but they still have the following key drawbacks: The low-frequency large-amplitude vibrations and high-frequency resonances generated during the operation of slurry pipelines can cause fluctuations in the spacing between the detection probe and the energy dissipation orifice plate, disrupting the stability of electromagnetic coupling and thus affecting the accuracy of wall thickness measurement. At the same time, since slurry pipelines are located in the field, temperature differences can be very large in some areas due to climate. Temperature changes in the pipeline's operating environment can alter the velocity of sound and the impedance of the electromagnetic coil. Traditional single linear compensation algorithms cannot accurately offset the influence of temperature on the detection results, resulting in large detection errors under wide temperature range conditions. In existing integrated devices, permanent magnets are mostly arranged with ordinary polarity, resulting in a dispersed magnetic field distribution. This leads to poor magnetic field focusing in the energy dissipation plate area and insufficient electromagnetic signal strength. Furthermore, permanent magnets lack effective demagnetization protection structures, making them prone to magnetic performance decay under high-temperature conditions, thus shortening the device's service life.

[0006] The distance between the detection probe and the energy dissipation plate is a key parameter affecting electromagnetic coupling efficiency. Existing technologies do not have a real-time distance adjustment mechanism, which cannot dynamically correct the distance deviation caused by vibration, further exacerbating the instability of detection accuracy.

[0007] Therefore, there is an urgent need for an integrated technical solution that combines high-efficiency energy dissipation, real-time accurate detection, strong anti-interference ability, and convenient installation and maintenance, in order to solve the technical problems of existing slurry pipelines such as the separation of energy dissipation and wall thickness detection, detection accuracy affected by environmental interference, and poor adaptability, so as to ensure the safe and stable operation of slurry pipelines. Summary of the Invention

[0008] In view of the problems or defects in the prior art, the present invention provides a slurry pipe wall thickness detection and energy dissipation system and method that combines energy dissipation and slurry wall thickness detection.

[0009] The technical solution of the present invention is: a slurry pipeline wall thickness detection and energy dissipation system, including a main unit, a probe module, a bracket, a temperature compensation sensor, an energy dissipation orifice plate, and a pressure-bearing shell disposed in the slurry pipeline; The pressure-bearing shell is a tubular structure with a through circular channel in the middle, and an energy dissipation plate that allows slurry to pass through is embedded in the circular channel; a through mounting hole is opened on one side of the tube wall of the pressure-bearing shell. The bracket is installed in the mounting hole, and the probe module is installed on the bracket; the bracket provides a stable reference plane for the probe module, and the detection end of the probe module contacts the outer wall of the energy dissipation plate so that the probe module can complete the detection of the wall thickness of the energy dissipation plate. The temperature compensation sensor is integrated inside or near the probe module and is used to measure the temperature of the probe module and the energy dissipation plate. The host computer connects to the probe module and temperature compensation sensor via wired or wireless means, and processes and analyzes the data transmitted back by the probe module and temperature compensation sensor. The host computer uses sound velocity-temperature segmented fitting and dynamically calculates the sound velocity according to the temperature range. At the same time, it uses electromagnetic coil impedance compensation for temperature correction to realize the detection of the wall thickness of the energy dissipation orifice plate.

[0010] Furthermore, the probe module is an ultrasonic testing device, including a permanent magnet assembly and a high-frequency coil. The permanent magnet assembly consists of one or more high-performance permanent magnets arranged in a specific polarity to generate a strong and stable bias magnetic field. The high-frequency coil includes an excitation coil and a receiving coil. The excitation coil is used to pass a high-frequency alternating current to generate a high-frequency alternating magnetic field.

[0011] Furthermore, the detection end of the probe module is also provided with a coupling surface on the surface of the energy dissipation plate; the special coating of the coupling surface is a ceramic coating.

[0012] Furthermore, the support adopts an adaptive damping vibration-resistant structure, including a rigid base, a flexible damping layer, and elastic positioning pins. The rigid base is made of high-strength aluminum alloy, and the flexible damping layer is a silicone layer with a thickness of 2-4 mm and a Shore hardness of 50-60 HA, which is disposed on the connection surface between the rigid base and the probe module. The elastic positioning pins are made of stainless steel, with built-in compression springs, and are symmetrically disposed on both sides of the probe module. Furthermore, the permanent magnet assembly adopts a magnetic field focusing and demagnetization prevention structure, including permanent magnets arranged in a Helbeck array and a magnetic shielding cover. The magnetic shielding cover is made of permalloy with a thickness of not less than 1 mm and is wrapped around the outside of the permanent magnet assembly. The permanent magnets are neodymium iron boron magnets.

[0013] Furthermore, the method of using piecewise fitting of sound speed and temperature and dynamically calculating the sound speed based on the temperature range is as follows: Construct a piecewise fitting model for sound speed and temperature: ; in, Let be the ultrasonic wave propagation velocity in the energy dissipation orifice plate at temperature T. Reference temperature The standard speed of sound is determined experimentally. For reference temperature, the default value is 25℃; The sound velocity-temperature fitting coefficients are obtained from experimental data using the least squares method. , T represents the boundary of the temperature compensation range. m The piecewise fitting boundary temperature was determined experimentally. Boundary temperature The speed of sound below, satisfying Ensure the two fitted curves are continuous; At this point, the initial value of the wall thickness temperature correction is... ; in, This is the initial wall thickness value after sound velocity correction; The ultrasonic round-trip time is the time it takes for the probe module to emit an ultrasonic wave and for the reflected wave to reach the receiving bottom surface, which is measured by the host signal processing system.

[0014] Furthermore, the host has a built-in database of sound velocity-temperature mapping curves for the metal material corresponding to the energy dissipation orifice plate. After receiving the temperature data T transmitted by the temperature compensation sensor, it automatically queries the database and calculates the sound velocity based on the corresponding sound velocity-temperature piecewise fitting according to the temperature range where T is located. V(T) .

[0015] Furthermore, the method for detecting the wall thickness of the energy dissipation orifice plate (8) by means of electromagnetic coil impedance compensation temperature correction is as follows: Constructing an electromagnetic coil impedance temperature compensation model: ,in ; in, Let T be the total impedance of the high-frequency coil at temperature T. For temperature The high-frequency coil resistance is below; C is the inductance of the high-frequency coil at temperature T; C is the parasitic capacitance of the high-frequency coil, which does not change with temperature and is determined by the structure of the high-frequency coil and is calibrated before leaving the factory. To determine the excitation current frequency, the host can... Dynamic adjustment; Reference temperature The high-frequency coil resistor is calibrated at the factory. The temperature coefficient of resistance of the high-frequency coil; Reference temperature The high-frequency coil inductance is factory rated. Temperature coefficient of inductance of high-frequency coil 4 ; j " is the imaginary unit of complex numbers; Temperature-corrected wall thickness ; in, Reference temperature The impedance magnitude of the high-frequency coil is below; Let be the impedance magnitude of the high-frequency coil at temperature T, satisfying... .

[0016] As another aspect of the present invention, a method for detecting the wall thickness of a slurry pipe and an energy dissipation system is also provided, comprising the following steps: S1: The host sends a high-frequency excitation signal to the probe module through the control circuit. The permanent magnet group in the probe module generates a constant static magnetic field, and the high-frequency coil generates an alternating electromagnetic field under the drive of alternating current. The two work together on the surface of the energy dissipation plate to excite ultrasonic waves through Lorentz force or magnetostriction effect. S2: When the ultrasonic wave propagates inside the energy dissipation plate and is reflected back to the probe module, the high-frequency coil converts the acoustic signal into an electrical signal and feeds it back to the host. At the same time, the temperature compensation sensor collects temperature data in real time and transmits it to the host. S3: The host performs temperature correction based on the collected temperature data. First, according to the temperature range, it calls the built-in sound speed temperature mapping curve to calculate the ultrasonic propagation speed at the corresponding temperature and obtains the initial wall thickness data after temperature compensation. S4: The initial wall thickness data is corrected by temperature correction through electromagnetic coil impedance compensation, and the wall thickness detection result of the energy dissipation orifice plate (8) is finally output and displayed.

[0017] Furthermore, step S4 also includes analyzing multiple sets of echo signals using the dual-gate peak method.

[0018] Compared with the prior art, the present invention has the following advantages: (1) The slurry pipe wall thickness detection and energy dissipation system of the present invention uses a temperature compensation sensor to collect temperature data in real time. Combined with the sound velocity-temperature mapping curve database built into the host and the piecewise fitting and electromagnetic characteristic compensation algorithm, it achieves the effect of correcting the influence of temperature on sound velocity and electromagnetic characteristics in a wide temperature range in the field, and improves the temperature adaptability and accuracy of wall thickness detection.

[0019] (2) The slurry pipe wall thickness detection and energy dissipation system of the present invention adopts a structural design of pressure-bearing shell and energy dissipation orifice plate, combined with the layout of the front and rear orifice diameter changes of the energy dissipation orifice plate, to achieve a high-efficiency energy dissipation effect for slurry in pipes with large drop and rapid drop, and avoid pipe damage caused by high-speed impact of slurry.

[0020] (3) The slurry pipe wall thickness detection and energy dissipation system of the present invention adopts an adaptive damping and vibration-resistant structure of rigid base + flexible damping layer + elastic positioning pin to reduce vibration and ensure electromagnetic coupling stability.

[0021] (4) The slurry pipe wall thickness detection and energy dissipation system of the present invention combines the energy dissipation orifice plate with wall thickness detection, which can achieve the purpose of pipe energy dissipation and realize real-time detection of the thickness of the energy dissipation orifice plate; it achieves efficient integration of functions in a limited space and achieves synergistic improvement of space utilization and cost-effectiveness. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the longitudinal section structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 3 This is a schematic flowchart of a preferred embodiment of the wall thickness detection method of the present invention; 1-Main unit, 2-Probe module, 3-Permanent magnet assembly, 4-High frequency coil, 5-Bracket, 6-Temperature compensation sensor, 7-Coupled surface, 8-Energy dissipation orifice plate, 9-Pressure-bearing housing, 10-Slurry pipe, 11-Mounting hole; Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Please refer to Figures 1-2The embodiments of the present invention relate to a slurry pipeline wall thickness detection and energy dissipation system, including a main unit 1, a probe module 2, a bracket 5, a temperature compensation sensor 6, an energy dissipation orifice plate 8, and a pressure-bearing shell 9 disposed in the slurry pipeline 10; The pressure-bearing shell 9 can be designed as a tubular structure with a through circular channel in the middle, into which an energy dissipation plate 8 is embedded for the passage of slurry; a through mounting hole 11 is opened on one side of the pipe wall of the pressure-bearing shell 9; the energy dissipation plate 8 is a stepped disc shape with a hole in the middle and the hole extends outward to form a raised tubular structure, and the energy dissipation of the pipeline with large drop and rapid drop is achieved by changing the front and rear hole diameters.

[0025] The bracket 5 is installed in the mounting hole, and the probe module 2 is installed on the bracket 5. The bracket 5 provides a stable reference plane for the probe module 2. The detection end of the probe module 2 contacts the outer wall of the energy dissipation plate 8 so that the probe module can complete the detection of the wall thickness of the energy dissipation plate. In some embodiments, the detection end of the probe module 2 and the surface of the energy dissipation plate 8 are also provided with a coupling surface 7. The coupling surface 7 is provided with a special coating, such as a ceramic coating. The ceramic coating has good signal penetration compatibility and can avoid the influence of impurities such as paint and rust on the surface of the energy dissipation plate 8 on electromagnetic shielding.

[0026] Temperature compensation sensor 6 is integrated inside or near probe module 2 and is used to measure the temperature of probe module 2 and energy dissipation plate 8. Multiple temperature compensation sensors 6 can be set to detect the temperature at different locations.

[0027] The host connects to the probe module 2 and the temperature compensation sensor 6 via wired or wireless means, and processes and analyzes the data transmitted back by the probe module 2 and the temperature compensation sensor 6. The host uses sound velocity-temperature segmented fitting and dynamically calculates the sound velocity according to the temperature range. At the same time, it uses electromagnetic coil impedance compensation for temperature correction to realize the detection of the wall thickness of the energy dissipation plate 8.

[0028] Specifically, in some embodiments, the method described above, which uses piecewise fitting of sound velocity and temperature and dynamically calculates the sound velocity based on the temperature range, is as follows: Construct a piecewise fitting model for sound speed and temperature: ; in, The ultrasonic propagation velocity in the energy-dissipating orifice plate (8) at temperature T; Reference temperature The standard speed of sound is determined experimentally. For reference temperature, the default value is 25℃; The sound velocity-temperature fitting coefficients are obtained from experimental data using the least squares method. , T represents the boundary of the temperature compensation range. mThe piecewise fitting boundary temperature was determined experimentally. Boundary temperature The speed of sound below, satisfying Ensure the two fitted curves are continuous; At this point, the initial value of the wall thickness temperature correction is... ; in, This is the initial wall thickness value after sound velocity correction; The ultrasonic round-trip time is the time it takes for the probe module (2) to emit ultrasonic waves to the receiving bottom surface to receive the reflected waves, which is measured by the signal processing system of the host (1).

[0029] In some embodiments, the host 1 has a built-in database of sound velocity-temperature mapping curves corresponding to the metal material of the energy dissipation plate 8. After receiving the temperature data T transmitted by the temperature compensation sensor 6, it automatically queries the database and calculates the sound velocity by calling the corresponding sound velocity-temperature piecewise fitting according to the temperature range where T is located. V(T) .

[0030] In some embodiments, the method for detecting the wall thickness of the energy dissipation orifice plate 8 by temperature correction through electromagnetic coil impedance compensation is as follows: Constructing an electromagnetic coil impedance temperature compensation model: ,in ; in, The total impedance of high-frequency coil 4 at temperature T; For temperature The high-frequency coil resistance is below; C is the inductance of high-frequency coil 4 at temperature T; C is the parasitic capacitance of high-frequency coil 4, which does not change with temperature and is determined by the structure of high-frequency coil 4 and is calibrated before leaving the factory. To determine the excitation current frequency, host 1 can... Dynamic adjustment; Reference temperature The high-frequency coil has 4 resistors, factory calibrated. The temperature coefficient of resistance for the high-frequency coil 4; Reference temperature The high-frequency coil has 4 inductors, factory rated. Temperature coefficient of inductance for high-frequency coil 4 4 ; j " is the imaginary unit of complex numbers; Temperature-corrected wall thickness ; in, Reference temperature The impedance modulus of the high-frequency coil (4) below; The impedance modulus of the high-frequency coil at temperature T is given, which satisfies... .

[0031] In some embodiments, the probe module 2 is preferably an ultrasonic testing device, including a permanent magnet group 3 and a high-frequency coil 4. The permanent magnet group 3 is composed of one or more high-performance permanent magnets arranged in a specific polarity to generate a strong and stable bias magnetic field. The high-frequency coil 4 includes an excitation coil and a receiving coil. The excitation coil is used to pass a high-frequency alternating current to generate a high-frequency alternating magnetic field.

[0032] In some embodiments, to further improve the stability of the bracket 5, the bracket 5 adopts an adaptive damping vibration-resistant structure, including a rigid base, a flexible damping layer and elastic positioning pins; the rigid base is made of high-strength aluminum alloy, the flexible damping layer is a silicone layer with a thickness of 2~4mm and a Shore hardness of 50~60HA, and is disposed on the connection surface between the rigid base and the probe module 2; the elastic positioning pins are made of stainless steel, have built-in compression springs, and are symmetrically disposed on both sides of the probe module 2.

[0033] Considering the need for long-term monitoring of the thickness of the energy dissipation perforated plate in practice, and to ensure long-term operational stability, in addition to the design of the support structure, a laser displacement sensor can also be installed on one side of the probe module 2 (note that this laser displacement sensor does not contact the energy dissipation perforated plate, but maintains a certain distance to facilitate the measurement of the distance change between the laser displacement sensor and the energy dissipation perforated plate), to collect the real-time distance between the probe module 2 and the energy dissipation perforated plate 8. The data is transmitted to host 1. The bracket 5 is also equipped with a miniature stepper motor for actively suppressing vibration effects (for example, a micro-stepping controlled permanent magnet stepper motor or an eccentric motor can be used to generate eccentric inertia that acts on the bracket; when using an eccentric motor, it does not need to be connected to the probe module). The output of the miniature stepper motor is connected to the probe module. The adjustment amount of bracket 5 is calculated using a fractional-order PID dynamic spacing compensation algorithm to correct spacing fluctuations caused by vibration in real time. The specific method is as follows: (1) Calculation of spacing deviation: ; in, for Time interval deviation; t To set the reference spacing, that is, the optimal detection spacing between probe module 2 and energy dissipation plate (8), it is determined by experiment; The actual measured distance at time t; (2) Fractional-order PID control output: ; in, The PID control output at time t is used to control the action of the miniature stepper motor built into bracket 5. This is a proportionality coefficient, adjusted according to the vibration amplitude; These are integral coefficients used to eliminate static spacing deviations; The differential coefficient, with a default value of 2-5, is used to suppress overshoot due to spacing fluctuations; D -λ For fractional integral operators, the order of integration is... satisfy The default value is λ=0.7, which is suitable for slowly changing low-frequency vibrations. For fractional differential operators, the order of the differential is... satisfy The default value is μ=0.6, which is suitable for rapidly changing high-frequency vibrations. (3) Adjustment amount execution formula: ; in, The actual adjustment amount at time t is used to drive the stepper motor to move the probe module 2 and correct the spacing deviation. The initial position is the reference distance when the distance between the laser displacement sensor and the energy dissipation plate 8 is the set value; For the integration variable, and The units are consistent; In some embodiments, the permanent magnet group 3 adopts a magnetic field focusing and anti-demagnetization structure, including permanent magnets arranged in a Heilbeck array and a magnetic shielding cover; the magnetic shielding cover is made of permalloy material with a thickness of not less than 1mm and is wrapped around the outside of the permanent magnet group 3; the permanent magnet is selected as neodymium iron boron magnet; as a further measure, a mica heat insulation pad with a thickness of not less than 2mm can be provided between the permanent magnet group 3 and the outer shell of the probe module 2 to block heat conduction and prevent the permanent magnets from demagnetizing.

[0034] Please refer to Figure 3 As another aspect of the present invention, a method for detecting the wall thickness of a pipeline and an energy dissipation system is also provided, comprising the following steps: S1: The host 1 sends a high-frequency excitation signal to the probe module 2 through the control circuit. The permanent magnet group 3 in the probe module 2 generates a constant static magnetic field. The high-frequency coil 4 generates an alternating electromagnetic field under the drive of alternating current, which excites ultrasound through Lorentz force or magnetostriction effect. S2: When the ultrasonic wave propagates inside the energy dissipation plate 8 and is reflected back to the probe module 2, the high-frequency coil 4 converts the acoustic signal into an electrical signal and feeds it back to the host 1. At the same time, the temperature compensation sensor 6 collects temperature data in real time and transmits it to the host 1. S3: Host 1 performs temperature correction based on the collected temperature data. First, according to the temperature range, it calls the built-in sound speed-temperature mapping curve to calculate the ultrasonic propagation speed at the corresponding temperature and obtains the initial wall thickness data after temperature compensation. S4: The initial wall thickness data is corrected by temperature correction through electromagnetic coil impedance compensation, and the wall thickness detection result of the energy dissipation orifice plate (8) is finally output and displayed.

[0035] In some preferred embodiments, step S4 further includes analyzing multiple sets of echo signals using the dual-gate peak method. The dual-gate peak method uses a dual determination mechanism of "high threshold gate" and "low threshold gate". Only when the signal amplitude exceeds two thresholds successively and meets the preset peak ratio relationship is it determined to be a valid echo. This can efficiently filter random noise below the low threshold and interference signals that have not reached the high threshold, avoiding false triggering and calculation deviation caused by noise.

[0036] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A slurry pipe wall thickness detection and energy dissipation system, characterized in that, Includes a main unit (1), a probe module (2), a bracket (5), a temperature compensation sensor (6), an energy dissipation orifice plate (8), and a pressure-bearing shell (9) installed in the slurry pipe (10); The pressure-bearing shell (9) is a tubular structure with a through circular channel in the middle, and an energy dissipation plate (8) for slurry to pass through is embedded in the circular channel; a through mounting hole (11) is opened on one side of the tube wall of the pressure-bearing shell (9). The bracket (5) is installed in the mounting hole, and the probe module (2) is installed on the bracket (5); the bracket (5) provides a stable reference plane for the probe module (2), and the detection end of the probe module (2) contacts the outer wall of the energy dissipation plate (8) so that the probe module can complete the detection of the wall thickness of the energy dissipation plate; The temperature compensation sensor (6) is integrated inside or near the probe module (2) and is used to measure the temperature of the probe module (2) and the energy dissipation plate (8); The host is connected to the probe module (2) and the temperature compensation sensor (6) via wired or wireless means, and processes and analyzes the data transmitted back by the probe module (2) and the temperature compensation sensor (6). The host uses sound speed-temperature segmented fitting and dynamically calculates the sound speed according to the temperature range. At the same time, it uses electromagnetic coil impedance compensation temperature correction to realize the detection of the wall thickness of the energy dissipation plate (8).

2. The slurry pipeline wall thickness detection and energy dissipation system according to claim 1, characterized in that, The probe module (2) is an ultrasonic testing device, including a permanent magnet group (3) and a high-frequency coil (4). The permanent magnet group (3) is composed of one or more high-performance permanent magnets arranged in a specific polarity to generate a strong and stable bias magnetic field. The high-frequency coil (4) includes an excitation coil and a receiving coil. The excitation coil is used to pass a high-frequency alternating current to generate a high-frequency alternating magnetic field.

3. The slurry pipeline wall thickness detection and energy dissipation system according to claim 1, characterized in that, The detection end of the probe module (2) and the surface of the energy dissipation plate (8) are also provided with a coupling surface (7); the special coating of the coupling surface (7) is a ceramic coating.

4. The slurry pipeline wall thickness detection and energy dissipation system according to claim 1, characterized in that, The bracket (5) adopts an adaptive damping vibration-resistant structure, including a rigid base, a flexible damping layer and an elastic positioning pin; the rigid base is made of high-strength aluminum alloy, the flexible damping layer is a silicone layer with a thickness of 2~4mm and a Shore hardness of 50~60HA, and is set on the connection surface between the rigid base and the probe module (2); the elastic positioning pin is made of stainless steel, with a built-in compression spring, and is symmetrically set on both sides of the probe module (2).

5. The slurry pipe wall thickness detection and energy dissipation system according to claim 1, characterized in that, The permanent magnet assembly (3) adopts a magnetic field focusing and anti-demagnetization structure, including permanent magnets arranged in a Heilbeck array and a magnetic shielding cover; the magnetic shielding cover is made of permalloy material with a thickness of not less than 1mm and is wrapped around the outside of the permanent magnet assembly (3); the permanent magnets are neodymium iron boron magnets.

6. The slurry pipeline wall thickness detection and energy dissipation system according to claim 1, characterized in that, The method of using piecewise fitting of sound speed and temperature and dynamically calculating sound speed based on temperature range is described above. Construct a piecewise fitting model of sound speed and temperature: ； in, The ultrasonic propagation velocity in the energy-dissipating orifice plate (8) at temperature T; Reference temperature The standard speed of sound is determined experimentally. For reference temperature, the default value is 25℃; The sound velocity-temperature fitting coefficients are obtained from experimental data using the least squares method. , T represents the boundary of the temperature compensation range. m The piecewise fitting boundary temperature was determined experimentally. Boundary temperature The speed of sound below, satisfying Ensure the two fitted curves are continuous; At this point, the initial value of the wall thickness temperature correction is... ; in, This is the initial wall thickness value after sound velocity correction; The ultrasonic round-trip time is the time it takes for the probe module (2) to emit ultrasonic waves to the receiving bottom surface to receive the reflected waves, which is measured by the signal processing system of the host (1).

7. The slurry pipeline wall thickness detection and energy dissipation system according to claim 6, characterized in that, The host (1) has a built-in energy dissipation plate (8) corresponding to the sound velocity-temperature mapping curve database of the metal material. After receiving the temperature data T transmitted by the temperature compensation sensor (6), it automatically queries the database and calls the corresponding sound velocity-temperature piecewise fitting calculation according to the temperature range where T is located. V(T) .

8. The slurry pipeline wall thickness detection and energy dissipation system according to claim 6, characterized in that, The method for detecting the wall thickness of the energy dissipation orifice plate (8) by means of impedance compensation and temperature correction through the electromagnetic coil is as follows: Constructing an electromagnetic coil impedance temperature compensation model: ,in ; in, Let T be the total impedance of the high-frequency coil (4) at temperature T; For temperature The high-frequency coil resistance is below; C is the inductance of the high-frequency coil (4) at temperature T; C is the parasitic capacitance of the high-frequency coil (4), which does not change with temperature and is determined by the structure of the high-frequency coil (4) and is calibrated before leaving the factory. To determine the excitation current frequency, the host (1) can adjust the frequency according to... Dynamic adjustment; Reference temperature The high-frequency coil (4) resistor is factory calibrated. The temperature coefficient of resistance of the high-frequency coil (4); Reference temperature The high-frequency coil (4) inductance is factory-calibrated. Temperature coefficient of inductance for high-frequency coil (4) 4 ;" j " is the imaginary unit of complex numbers; Temperature-corrected wall thickness ; in, Reference temperature The impedance modulus of the high-frequency coil (4) below; The impedance modulus of the high-frequency coil (4) at temperature T satisfies .

9. A method for detecting the wall thickness of a slurry pipe and an energy dissipation system based on any one of claims 1-8, characterized in that, Includes the following steps: S1: The host (1) sends a high-frequency excitation signal to the probe module (2) through the control circuit. The permanent magnet group (3) in the probe module (2) generates a constant static magnetic field. The high-frequency coil (4) generates an alternating electromagnetic field under the drive of alternating current, and excites ultrasonic waves through Lorentz force or magnetostriction effect. S2: When the ultrasonic wave propagates inside the energy-dissipating perforated plate (8) and is reflected back to the probe module (2), the high-frequency coil (4) converts the acoustic signal into an electrical signal and feeds it back to the host (1). At the same time, the temperature compensation sensor (6) collects temperature data in real time and transmits it to the host (1). S3: The host (1) performs temperature correction based on the collected temperature data. First, according to the temperature range, it calls the built-in sound speed-temperature mapping curve to calculate the ultrasonic propagation speed at the corresponding temperature and obtains the initial wall thickness data after temperature compensation. S4: The initial wall thickness data is corrected by temperature correction through electromagnetic coil impedance compensation, and the wall thickness detection result of the energy dissipation orifice plate (8) is finally output and displayed.

10. The method for detecting the wall thickness of a slurry pipeline and the wall thickness of an energy dissipation system according to claim 9, characterized in that, Step S4 also includes analyzing multiple sets of echo signals using the dual-gate peak method.

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