A device for detecting leaks in a clark tube

Abstract

The application relates to a kind of clara pipe water leakage detection devices, it includes: detection frame;Support mechanism is arranged on detection frame and is used to support the clara pipe to be detected to detect;And test mechanism, whether the water leakage problem of clara pipe exists is judged by output voltage signal change;Test mechanism includes: float ball assembly, float ball assembly is arranged inside the clara pipe main body;And feedback component, for feedback voltage change in turn embodies detection structure;Support mechanism is used to store float ball assembly.The application is by using parabolic interpolation algorithm, the voltage value of peak sensor and its adjacent two sensors is used for parabolic fitting, and sub-millimeter level positioning accuracy can be realized, higher than the accuracy of visual reading in the prior art.

Description

Technical Field

[0001] This application relates to the technical field of kraft pipe detection, and in particular to a kraft pipe leakage detection device. Background Technology

[0002] Currently, Krah pipes, as a high-performance drainage pipe material, are widely used in municipal engineering, chemical industrial parks, and water conservancy facilities. Since Krah pipes are typically buried underground, leaks not only waste water resources but can also trigger secondary disasters such as ground subsidence and roadbed collapse. Therefore, regular or real-time leak detection of Krah pipes is of great importance.

[0003] In related technologies, the device uses a suspension plate installed inside the pipeline. The suspension plate is connected to an external indicating mechanism via a connecting plate. When the pipeline leaks and the water level drops, the suspension plate causes the connecting plate to drop synchronously. The water level line on the connecting plate is observed to determine whether there is a leak.

[0004] The aforementioned technologies have the following drawbacks: the device relies on manual visual reading of the water level scale, resulting in large reading errors, and it cannot achieve continuous and automated liquid level monitoring, making it difficult to meet the management needs of modern intelligent pipe networks. Furthermore, for long-distance buried kraft pipes or pipe sections already within a pipeline network, their ports are often difficult to access or are fixed and sealed. Traditional methods of manually deploying floats directly from the ends are difficult and inefficient. Therefore, there is an urgent need for an automatic float release structure that can be remotely triggered without drilling holes in the pipe wall. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a leak detection device for kraft pipes.

[0006] The leak detection device for kraft pipes provided in this application adopts the following technical solution: A leak detection device for corrugated pipes, comprising: Testing frame; A support mechanism, mounted on the testing frame, is used to support and test the lamellar tube to be tested; and The testing agency determines whether the Krah tube has a leakage problem by changing the output voltage signal; The testing organizations include: A float assembly is disposed inside the body of the kraft tube; and Feedback component, used to reflect voltage changes and thus reflect the detection structure; The support mechanism is used to store the float assembly.

[0007] Furthermore, the float assembly includes: A sealed float is floating inside a corrugated tube; and A permanent magnet is embedded inside the sealed float. The density of the sealed float is less than the density of the liquid inside the Krah tube.

[0008] Furthermore, the feedback component includes: A Hall sensor array is disposed outside the body of the lauryl tube, with the detection surface of the linear Hall sensor facing the outer wall of the lauryl tube body; and The signal processing module is electrically connected to the Hall sensor array and is used to acquire the output voltage signals of the multiple linear Hall sensors; The Hall sensor array consists of multiple linear Hall sensors arranged along the length of the kraft tube. The signal processing module calculates the axial position of the sealing float within the kraft tube body based on the output voltage signal.

[0009] Furthermore, the signal processing module includes: The signal acquisition unit is used to acquire the output voltage signals of the plurality of linear Hall sensors at a preset sampling frequency; A peak detection unit is used to determine the number of the linear Hall sensor corresponding to the maximum voltage value from the output voltage signal; and The interpolation calculation unit is used to calculate the precise position of the float assembly based on the voltage value corresponding to different linear Hall sensor numbers using a parabolic interpolation algorithm.

[0010] Furthermore, the support mechanism includes: The water inlet pipe is used to fix the test tube at the opening of the water inlet pipe with a pipe clamp; The sealing assembly seals the other end of the test tube; and Storage component for storing the sealed float.

[0011] Furthermore, the storage component includes: Storage chamber, located inside the water inlet pipe and used for; and The control unit uses a phase change to force the float into the lauryl tube; After liquid is injected into the kraft tube, a phase change occurs in the control unit, releasing the sealing float.

[0012] Furthermore, the control unit includes: The control panel is slidably positioned above the opening of the storage cavity and shields the sealing float; and The power unit is used to enable the reciprocating motion of the control panel.

[0013] Furthermore, the control group includes: The control cylinder is horizontally mounted on the testing frame; A phase change capsule is disposed inside a control cylinder and one end is fixed to the inner wall at the bottom of the control cylinder; A strong magnetic array, disposed on the inner wall of the control cylinder, is used to provide a strong magnetic field; and Elastic components are used to keep the control board away from the storage cavity and to connect the control board and the detection frame separately; The phase change capsule is filled with magnetorheological fluid; When the sealed float is placed inside the storage cavity, the control board is located above the storage cavity, and the strong magnetic array provides a strong magnetic field to the magnetorheological fluid inside the phase change capsule. When water filling begins, the magnetic field of the strong magnetic array is disconnected, and the elastic element pulls the control board away from the storage cavity.

[0014] In summary, the beneficial technical effects of this application are as follows: 1. This invention, by setting up a storage component and utilizing the principle of magnetic phase change, automatically releases the sealed float during the water injection process, eliminating the need for manual placement of the float inside the pipe. After the test is completed, the sealed float can be recovered into the storage chamber by draining water. The operation is convenient and it is particularly suitable for the testing of long-distance pipelines or buried pipelines. 2. When the sealing float is located at a certain position in the Hall sensor array, the output voltage of the linear Hall sensor closest to the sealing float is the highest, followed by the output voltage of the adjacent linear Hall sensor, and the output voltage of the linear Hall sensor further away is almost zero. The output voltage distribution of the entire array presents a single-peak curve, and the peak position corresponds to the horizontal position of the sealing float. Based on the sealing float position data at multiple consecutive moments, it is determined whether the Krah tube is leaking: if the position of the sealing float continues to decrease over time, it is determined that the Krah tube is leaking. 3. Liquid is injected into the Krah tube through the inlet pipe, while the magnetic field of the strong magnetic array is simultaneously disconnected. The magnetorheological fluid inside the phase change capsule changes from a near-solid state to a liquid state. The elastic element pulls the control plate away from the storage cavity, and the sealed float is released from the storage cavity and rises to the liquid surface under the action of buoyancy. Specifically, the inlet valve is opened, and liquid enters the Krah tube through the inlet pipe. As the liquid level rises, the liquid enters the storage cavity through the through-hole on the side wall of the storage cavity, and the sealed float is submerged in the liquid. When the liquid level rises to a certain level, the buoyancy of the sealed float exceeds its weight, and it begins to rise. At the same time, the magnetic field of the strong magnetic array is disconnected, the phase change capsule contracts, the elastic element pulls the control plate away from the storage cavity, the opening of the storage cavity opens, and the sealed float floats out of the storage cavity under the action of buoyancy, enters the Krah tube, and rises to the liquid surface. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Testing rack; 2. Float assembly; 21. Sealed float; 22. Permanent magnet; 23. Counterweight; 3. Feedback component; 31. Hall sensor array; 4. Support mechanism; 41. Water inlet pipe; 42. Sealing assembly; 43. Storage cavity; 44. Control board; 45. Control cylinder; 46. Phase change capsule; 47. Strong magnetic array; 48. Elastic element. Detailed Implementation

[0017] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] This application discloses a leak detection device for a corrugated pipe. (Refer to...) Figures 1-2 The device includes: a testing frame 1; a support mechanism 4, mounted on the testing frame 1 and used to support and test the kraft tube under test; and a testing mechanism, which determines whether the kraft tube has a leakage problem by changing the output voltage signal. The testing frame 1 is the supporting foundation of the entire device, used to install and fix the support mechanism 4 and the various components of the testing mechanism. The bottom of the testing frame 1 is equipped with adjustable height anchor bolts to adapt to different flatness of the installation ground. During the testing process, the kraft tube needs to be fixed on the testing frame 1, and the testing mechanism is used to detect the change of liquid level in the kraft tube to determine whether the kraft tube has a leakage problem.

[0019] The testing mechanism includes: a float assembly 2, which is disposed inside the body of the Krah tube; and a feedback assembly 3, which is used to provide feedback on voltage changes to reflect the detection structure; and a support mechanism 4 for storing the float assembly 2. The support mechanism 4 stores the float assembly 2 before the Krah tube is tested. The float assembly 2 includes a sealed float 21 and a permanent magnet 22. The sealed float 21 is floatingly disposed inside the Krah tube 400. The sealed float 21 is made of a corrosion-resistant, low-density material, such as a hollow sphere of polypropylene or polyethylene, whose density is less than that of the liquid inside the Krah tube, so that the sealed float 21 can float on the liquid surface. The outer diameter of the sealed float 21 is smaller than the inner diameter of the Krah tube. The difference between the outer diameter of the sealed float 21 and the inner diameter of the Krah tube is 10mm~50mm. This gap ensures that the sealed float 21 can float freely in the pipe without generating frictional resistance due to contact with the pipe wall, and also prevents the sealed float 21 from shaking excessively in the pipe due to an excessively large gap.

[0020] A permanent magnet 22 is embedded inside the sealed float 21. The permanent magnet 22 is an axially magnetized cylindrical permanent magnet 22, preferably made of neodymium iron boron material. The permanent magnet 22 is embedded at the center of the sealed float 21, and its magnetic axis direction coincides with the vertical axis of the sealed float 21. Preferably, in this embodiment, a counterweight 23 is also embedded inside the sealed float 21. The counterweight 23 is located below the permanent magnet 22 and is made of a non-magnetic material with high density, such as brass or stainless steel. The function of the counterweight 23 is to lower the center of gravity of the sealed float 21, ensuring that the sealed float 21 always remains upright in the liquid, and keeping the magnetic axis direction of the permanent magnet 22 vertical, thereby ensuring the symmetry and predictability of the magnetic field distribution.

[0021] Feedback component 3 includes a Hall sensor array 31 and a signal processing module. The Hall sensor array 31 is disposed outside the Krah tube, with the detection surface of the linear Hall sensors facing the outer wall of the Krah tube. The Hall sensor array 31 consists of multiple linear Hall sensors arranged along the length of the Krah tube, and the detection surface of the linear Hall sensors is perpendicular to the radial direction of the Krah tube. The diameter of the permanent magnet 22 and the spacing ΔL between the Hall sensors satisfy the following relationship: ΔL = 0.8d ~ 1.2d. This proportional relationship ensures the maximization of the magnetic field gradient, making the voltage difference between adjacent sensors significant, which is beneficial to improving the accuracy of the interpolation algorithm.

[0022] Multiple linear Hall sensors 3211 are fixed to the outer wall of the tube by a flexible or rigid circuit board. The circuit board is bonded to the outer wall of the tube with glue to ensure a firm fit between the circuit board and the tube wall. The spacing between adjacent linear Hall sensors is ΔL, and the value of ΔL ranges from 5mm to 20mm, preferably 10mm.

[0023] The signal processing module is electrically connected to the Hall sensor array 31 and is used to acquire the output voltage signals of multiple linear Hall sensors. The signal processing module calculates the axial position of the sealed float 21 within the tube based on the output voltage signals. The signal processing module can utilize existing signal acquisition units, peak detection units, and interpolation calculation units. The signal acquisition unit acquires the output voltage signals of multiple linear Hall sensors at a preset sampling frequency. The peak detection unit determines the number of the linear Hall sensor corresponding to the maximum voltage value from the output voltage signals. Specifically, the peak detection unit iterates through the voltage values ​​of all channels to find the channel number with the largest voltage value. The interpolation calculation unit calculates the precise position of the sealed float 21 using a parabolic interpolation algorithm based on the voltage values ​​corresponding to the number i and the numbers i-1 and i+1. The interpolation calculation unit uses the following formula to calculate the precise position x0 of the float assembly: x0 = x i + (ΔL / 2) × (Vi-1 - V i+1 ) / (V i-1 - 2V i + V i+1 ); Where, x i Let V be the position coordinate of the linear Hall sensor (310) numbered i, ΔL be the distance between adjacent linear Hall sensors (310), and V be the position coordinate of the linear Hall sensor (310). i-1 V i V i+1 These are the output voltage values ​​of the linear Hall sensors (310) numbered i-1, i, and i+1, respectively.

[0024] When the sealed float 21 is located at a certain position in the Hall sensor array 31, the output voltage of the linear Hall sensor closest to the sealed float 21 is the highest, followed by the output voltage of the adjacent linear Hall sensor, and the output voltage of the linear Hall sensor farther away is almost zero. Therefore, the output voltage distribution of the entire array presents a single-peak curve, and the peak position corresponds to the horizontal position of the sealed float 21.

[0025] The support mechanism 4 includes an inlet pipe 41, a sealing assembly 41, and a storage assembly. The inlet pipe 41 is a rigid metal pipe with one end as the inlet and the other end as the connector. The outer diameter of the connector matches the inner diameter of the test tube. During installation, one end of the test tube is fitted onto the connector of the inlet pipe 41, and the tube is then securely connected to the inlet pipe 41 using a pipe clamp. The pipe clamp is made of stainless steel or nylon and features high locking force and good sealing performance. A rubber sealing gasket is provided on the inner side of the pipe clamp to ensure the sealing performance of the connection. An inlet valve is provided on the side wall of the inlet pipe 41 and connects to an external water supply pipeline.

[0026] The sealing assembly 41 is used to seal the other end of the test tube and is fixed by a sealing end cap and screws. The sealing end cap is equipped with an air vent valve, which is used to expel air from the inside of the tube during the water injection process to ensure that the liquid can fill the entire pipe. The air vent valve is preferably an automatic air vent valve, which automatically opens to vent when air accumulates in the pipe and automatically closes when the liquid is full.

[0027] The storage assembly includes a storage cavity 42 and a control unit. The control unit uses a phase change to expel the float into the corrugated tube. The storage cavity 42 is located inside the inlet pipe 41. Specifically, the storage cavity 42 is a receiving space inside the inlet pipe 41, and its shape and size are adapted to the sealing float 21. The opening of the storage cavity 42 faces upward, allowing the sealing float 21 to float out of the storage cavity 42 under buoyancy. The bottom of the storage cavity 42 is provided with a guide slope that is inclined towards the opening of the storage cavity 42, so that the sealing float 21 can slide out smoothly under buoyancy. The side wall of the storage cavity 42 is provided with several through holes to allow liquid to enter the storage cavity 42, so that the sealing float 21 can be immersed in the liquid.

[0028] The control unit includes a control plate 43 and a power unit. The control plate 43 is slidably positioned above the opening of the storage cavity 42 and shields the sealing float 21. The control plate 43 is a flat plate structure, the shape of which matches the shape of the opening of the storage cavity 42. The control plate 43 is horizontally positioned above the storage cavity 42. When the control plate 43 is directly above the storage cavity 42, its lower surface contacts or approaches the edge of the opening of the storage cavity 42, thereby sealing the sealing float 21 inside the storage cavity 42 and preventing the sealing float 21 from falling out of the storage cavity 42 before water is injected. Slider blocks are provided on both sides of the control plate 43. The sliders are slidably mounted on the slide rails provided on the detection frame 1, allowing the control plate 43 to slide back and forth in the horizontal direction.

[0029] The power unit is used to realize the reciprocating motion of the control plate 43. The power unit includes a control cylinder 44, a phase change capsule 45252, a strong magnetic array 46, and an elastic element 47. The control cylinder 44 is horizontally arranged on the detection frame 1. Specifically, the control cylinder 44 is a hollow cylindrical structure, and its axis is parallel to the sliding direction of the control plate 43. One end of the control cylinder 44 is fixed to the detection frame 1, and the other end extends toward the control plate 43. The inner wall of the control cylinder 44 is smooth so that the phase change capsule 45 can freely expand and contract within the control cylinder 44.

[0030] A phase change capsule 45 is disposed inside a control cylinder 44, with one end fixed to the inner wall of the bottom end of the control cylinder 44. Specifically, the phase change capsule 45 is a flexible sealing capsule made of elastic rubber or silicone material. One end of the phase change capsule 45 is fixedly connected to the inner wall of the bottom end of the control cylinder 44, while the other end is a free end. The interior of the phase change capsule 45 is filled with magnetorheological fluid, which is a phase change material whose rheological properties can undergo rapid and reversible changes under the action of an external magnetic field. Under no magnetic field conditions, the magnetorheological fluid exhibits low viscosity Newtonian fluid; under strong magnetic field conditions, the viscosity of the magnetorheological fluid increases sharply, exhibiting a near-solid state.

[0031] A strong magnetic array 46 is disposed on the inner wall of the control cylinder 44 and is used to provide a strong magnetic field. Specifically, the strong magnetic array 46 consists of multiple electromagnets or permanent magnets 22 arranged circumferentially along the control cylinder 44. The strong magnetic array 46 is electrically connected to the control circuit, which can control the energization and de-energization of the strong magnetic array 46. When the strong magnetic array 46 is energized, it generates a strong magnetic field, causing the magnetorheological fluid inside the phase change capsule 45 to become a near-solid state, and the volume of the phase change capsule 45 expands. When the strong magnetic array 46 is de-energized, the magnetic field disappears, the magnetorheological fluid returns to a liquid state, and the phase change capsule 45 contracts under the action of elastic restoring force.

[0032] The elastic element 47 is used to move the control plate 43 away from the storage cavity 42 and connects both the control plate 43 and the detection frame 1. Specifically, the elastic element 47 is a tension spring, with one end fixedly connected to the control plate 43 and the other end fixedly connected to the detection frame 1. The tension direction of the elastic element 47 is consistent with the direction in which the control plate 43 moves away from the storage cavity 42. When the control plate 43 is above the storage cavity 42, the elastic element 47 is in a stretched state, tending to drive the control plate 43 away from the storage cavity 42. The free end of the phase change capsule 45 is connected to the control plate 43. Specifically, the free end of the phase change capsule 45 is fixedly connected to the control plate 43 via a connecting rod. When the phase change capsule 45 expands, it pushes the connecting rod, thereby pushing the control plate 43 to move towards the storage cavity 42; when the phase change capsule 45 contracts, the elastic element 47 pulls the control plate 43 away from the storage cavity 42.

[0033] When the sealed float 21 is placed inside the storage cavity 42, the strong magnetic array 46 is energized, generating a strong magnetic field. The magnetorheological fluid inside the phase change capsule 45 becomes almost solid, and the phase change capsule 45 expands. This expansion pushes the control plate 43, which moves above the storage cavity 42 via the connecting rod, thus blocking and limiting the sealing float 21. At this time, the elastic element 47 is in a stretched state. When water is injected, the magnetic field of the strong magnetic array 46 is disconnected, the magnetorheological fluid returns to a liquid state, the phase change capsule 45 contracts, and the elastic element 47 pulls the control plate 43 away from the storage cavity 42. The opening of the storage cavity 42 opens, and the sealed float 21 floats out of the storage cavity 42 under buoyancy and enters the interior of the Krah tube.

[0034] In contrast to existing technologies that require manual or additional deployment, this application utilizes strong magnets to automatically float the sealed float within the storage cavity. This ensures that no float deployment is needed during the testing process, and the float can be automatically released during testing without requiring additional holes in the kraft tube. Furthermore, the sealed float can be reused multiple times without causing damage to the kraft tube due to additional float deployment. At the same time, the control signal of the strong magnetic array can penetrate the pipe wall and the soil cover, making it particularly suitable for trenchless testing of buried pipelines. This solves the technical problem in existing technologies where float deployment is limited by the location of the pipeline port and the external operating space.

[0035] The implementation principle of the Krah tube leakage detection device in this application embodiment is as follows: the Krah tube to be tested is fixed to the opening of the inlet pipe 41 by a pipe clamp, the sealing component 41 is installed at the other end of the Krah tube to form a closed detection circuit, the sealing float 21 is placed in the storage cavity 42, the control board 43 is moved above the storage cavity 42 under the drive of the power unit to block and limit the sealing float 21, the strong magnetic array 46 is energized to generate a strong magnetic field, the magnetorheological fluid in the phase change capsule 45 becomes a near-solid, the phase change capsule 45 expands, and the control board 43 is pushed towards the storage cavity 42 by the connecting rod until the control board 43 is directly above the storage cavity 42, sealing the sealing float 21 inside the storage cavity 42; Liquid is injected into the Krah tube through the inlet pipe 41, and simultaneously the magnetic field of the strong magnetic array 46 is disconnected. The magnetorheological fluid inside the phase change capsule 45 changes from a near-solid state to a liquid state. The elastic element 47 pulls the control plate 43 away from the storage cavity 42, and the sealing float 21 is released from the storage cavity 42 and floats to the liquid surface under the action of buoyancy. Specifically, the inlet valve is opened, and liquid enters the Krah tube through the inlet pipe 41. As the liquid level rises, the liquid enters the storage cavity 42 through the through hole on the side wall of the storage cavity 42, and the sealing float 21 is submerged in the liquid. When the liquid level rises to a certain level, the buoyancy of the sealing float 21 is greater than its weight, and it begins to float. At the same time, the magnetic field of the strong magnetic array 46 is disconnected, the phase change capsule 45 contracts, the elastic element 47 pulls the control plate 43 away from the storage cavity 42, the opening of the storage cavity 42 opens, and the sealing float 21 floats out of the storage cavity 42 under the action of buoyancy, enters the Krah tube, and floats to the liquid surface. When the sealing float 21 is located at a certain position in the Hall sensor array 31, the output voltage of the linear Hall sensor closest to the sealing float 21 is the highest, the output voltage of the adjacent linear Hall sensor is the second highest, and the output voltage of the linear Hall sensor further away is almost zero. The output voltage distribution of the entire array presents a single-peak curve, and the peak position corresponds to the horizontal position of the sealing float 21. Based on the position data of the sealing float 21 at multiple consecutive moments, it is determined whether the Krah tube is leaking: if the position of the sealing float 21 continues to decrease over time, it is determined that the Krah tube is leaking.

[0036] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar terms mean that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leak detection device for corrugated pipes, characterized in that, include: Testing frame; A support mechanism is installed on the testing frame and is used to support and test the test tube. as well as The testing agency determines whether the Krah tube has a leakage problem by changing the output voltage signal; The testing organizations include: A float assembly is disposed inside the body of the kraft tube; and The feedback component is used to reflect voltage changes, thereby indicating the results of leak detection. The support mechanism is used to store the float assembly.

2. The leakage detection device for a corrugated pipe according to claim 1, characterized in that, The float assembly includes: A sealed float is floating inside a corrugated tube; and A permanent magnet is embedded inside the sealed float. The density of the sealed float is less than the density of the liquid inside the Krah tube.

3. The leakage detection device for a corrugated pipe according to claim 2, characterized in that, The feedback component includes: A Hall sensor array is disposed outside the body of the lauryl tube, with the detection surface of the linear Hall sensor facing the outer wall of the lauryl tube body; and The signal processing module is electrically connected to the Hall sensor array and is used to acquire the output voltage signals of the multiple linear Hall sensors; The Hall sensor array consists of multiple linear Hall sensors arranged along the length of the kraft tube. The signal processing module calculates the axial position of the sealing float within the kraft tube body based on the output voltage signal.

4. A leak detection device for a corrugated pipe according to claim 3, characterized in that, The signal processing module includes: The signal acquisition unit is used to acquire the output voltage signals of the plurality of linear Hall sensors at a preset sampling frequency; A peak detection unit is used to determine the number of the linear Hall sensor corresponding to the maximum voltage value from the output voltage signal; and The interpolation calculation unit is used to calculate the precise position of the float assembly based on the voltage value corresponding to different linear Hall sensor numbers using a parabolic interpolation algorithm.

5. A leak detection device for a corrugated pipe according to claim 4, characterized in that, The supporting structure includes: The water inlet pipe is used to fix the test tube at the opening of the water inlet pipe with a pipe clamp; The sealing assembly seals the other end of the test tube; and A storage component is used to releasably store the sealed float, and after liquid is injected into the body of the kra tube, the storage component releases the restriction on the sealed float, so that the sealed float is released into the kra tube under the action of buoyancy.

6. A leak detection device for a corrugated pipe according to claim 5, characterized in that, The storage component includes: The storage chamber is located inside the water inlet pipe; and The control unit uses a phase change to force the float into the lauryl tube; After liquid is injected into the kraft tube, a phase change occurs in the control unit, releasing the sealing float.

7. A leak detection device for a corrugated pipe according to claim 6, characterized in that, The control unit includes: The control panel is slidably positioned above the opening of the storage cavity and shields the sealing float; and The power unit is used to enable the reciprocating motion of the control panel.

8. A leak detection device for a corrugated pipe according to claim 7, characterized in that, The control group includes: The control cylinder is horizontally mounted on the testing frame; A phase change capsule is disposed inside a control cylinder and one end is fixed to the inner wall at the bottom of the control cylinder; A strong magnetic array, disposed on the inner wall of the control cylinder, is used to provide a strong magnetic field; and Elastic components are used to keep the control board away from the storage cavity and to connect the control board and the detection frame separately; The phase change capsule is filled with magnetorheological fluid; When the sealed float is placed inside the storage cavity, the control board is located above the storage cavity, and the strong magnetic array provides a strong magnetic field to the magnetorheological fluid inside the phase change capsule. When water filling begins, the magnetic field of the strong magnetic array is disconnected, and the elastic element pulls the control board away from the storage cavity.

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