Stress regulation and control and magnetic detection collaborative integrated device and detection method

Abstract

The invention discloses a stress regulation and control and magnetic detection collaborative integrated device and a detection method, and the stress regulation and control and magnetic detection collaborative integrated device comprises a supporting module, a clamping and fixing module, a force loading module, a magnetic detection module and a data acquisition module, a first clamping end of the clamping and fixing module is adjustably fixed on the supporting module, a second clamping end of the clamping and fixing module is slidably arranged on the supporting module, and the clamping and fixing module is configured to be used for clamping a test piece; the force loading module is arranged between the second clamping end of the supporting module and the clamping and fixing module, and is configured to be used for applying horizontal pulling force to the test piece; the magnetic detection module is adjustably arranged on the supporting module and is configured to carry out magnetization and magnetic flux leakage detection on the test piece with adjustable lift-off value and magnetization intensity; and the data acquisition module is arranged on the force loading module and the magnetic detection module respectively, and is configured to be used for acquiring a tension signal and a magnetic induction intensity signal, and transmitting signal data to the computer in real time. The technical problems that in the prior art, due to the fact that a stretching device and a magnetic detection device are separated, operation is tedious, data are not synchronous, detection precision is insufficient, and a combined device is unstable in force conduction and poor in adaptability can be solved.

Description

Technical Field

[0001] This invention relates to the field of interdisciplinary technology of material mechanical property testing and magnetic detection, and more particularly to an integrated device and method for stress regulation and magnetic detection. Background Technology

[0002] In the field of materials performance evaluation and defect detection, establishing a quantitative correlation between "mechanical loading and defect response" is one of the core research directions. In existing technologies, tensile mechanical property testing and magnetic detection functions are often distributed across two separate sets of equipment, resulting in the following key technical shortcomings:

[0003] 1) The operation process is fragmented, requiring manual transfer of specimens to complete "stretching before testing" or "stretching while manually assisting testing", which is prone to specimen positioning deviation and sudden changes in stress state, resulting in data correlation distortion;

[0004] 2) Data acquisition is asynchronous. The two sets of equipment record data independently, resulting in time differences and parameter matching errors, making it difficult to capture the instantaneous correspondence between defect evolution and stress changes;

[0005] 3) Insufficient force transmission stability. The guide rod and clamp of traditional tensioning devices are mostly rigidly connected. Assembly deviations can easily generate additional bending moments, affecting the accuracy of tensile force transmission and thus interfering with the magnetic detection signal.

[0006] 4) Poor magnetic detection adaptability: The magnetization and detection components of the existing combined device are in fixed positions, making it impossible to accurately adjust key parameters such as magnetization intensity and lift-off value according to the size and material characteristics of the specimen. This results in a limited detection range and insufficient accuracy.

[0007] 5) The data processing efficiency is low. It requires manual integration of the detection data from the two sets of equipment, which is prone to human error and cannot achieve real-time linkage analysis of "stress-magnetic signal-defect evolution".

[0008] Currently, these problems make it difficult for existing technologies to meet the needs of materials research for data accuracy, process efficiency, and ease of operation, thus limiting the in-depth exploration of the correlation between mechanical and magnetic properties.

[0009] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0010] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes an integrated device and method for stress regulation and magnetic detection, which can realize the entire process of mechanical tensile loading, precise magnetization, magnetic signal detection, and synchronous data acquisition, and can capture the dynamic changes of magnetic induction intensity at defects during the tensile process of the specimen in real time.

[0011] According to the present invention, a stress regulation and magnetic detection integrated device includes:

[0012] Support module;

[0013] The clamping and fixing module has a first clamping end that is adjustablely fixed to the support module, and a second clamping end that is slidably disposed on the support module and configured for clamping the specimen.

[0014] A force loading module is disposed between the second clamping end of the support module and the clamping and fixing module, and is configured to apply a horizontal tensile force to the specimen.

[0015] The magnetic detection module is adjustablely mounted on the support module and configured to perform magnetization and magnetic leakage detection on the specimen with adjustable lift-off value and magnetization intensity.

[0016] The system includes a data acquisition module, which is located in both the force loading module and the magnetic detection module. The data acquisition module is configured to acquire tensile force signals and magnetic induction intensity signals and transmit the signal data to the computer in real time.

[0017] According to some embodiments of the integrated device of the present invention, the support module includes a main reaction frame, an auxiliary reaction frame, and a reinforcing steel plate; the main reaction frame and the auxiliary reaction frame are arranged in parallel and are connected laterally around the perimeter by connecting rods to form a support frame, and the reinforcing steel plate is integrally connected to the side of the support frame facing the force loading module.

[0018] According to some embodiments of the integrated device of the present invention, the clamping and fixing module includes a movable clamp, an adjustable fixing clamp, and a locking assembly;

[0019] Adjustable fixed clamps and movable clamps are arranged opposite to each other inside the support frame to form a clamping structure. At the same time, the adjustable fixed clamps are slidably connected to the auxiliary reaction frame, and the movable clamps are slidably connected to the main reaction frame.

[0020] The adjustable fixing clamp is also fixedly connected to a threaded rod at one end away from the movable clamp. A fixed end nut is fitted on the threaded rod. The fixed end nut is located on the outside of the adjustable fixing clamp. Rotating the fixed end nut can adjust and lock the horizontal position of the adjustable fixing clamp.

[0021] The movable fixture is also connected to the force loading module at one end, which is away from the adjustable fixed fixture.

[0022] Both the adjustable fixed clamp and the movable clamp are equipped with locking components at their upper and lower ends. The locking components include a fixing plate, a screw, and a nut. The fixing plate vertically presses and fixes the specimen through the cooperation of the screw and the nut.

[0023] According to some embodiments of the integrated device of the present invention, the force loading module includes a hydraulic press, a steel plate guide rod assembly and a universal hinge. The hydraulic press is fixedly connected to the side of the main reaction frame through a reinforcing steel plate. The output end of the hydraulic press is fixedly connected to a steel plate end of the steel plate guide rod assembly. The guide rod end of the steel plate guide rod assembly is connected to the movable clamp through the universal hinge.

[0024] According to some embodiments of the integrated device of the present invention, the magnetic detection module includes an electromagnet, a magnetic flux leakage detection bracket, and a height adjustment screw; the magnetic flux leakage detection bracket is slidably connected to the top of the support frame for horizontal position adjustment; the electromagnet is fixed to the bottom of the magnetic flux leakage detection bracket by a mounting base, and the height adjustment screw passes through the magnetic flux leakage detection bracket and is threadedly connected to the mounting base.

[0025] According to some embodiments of the integrated device of the present invention, the data acquisition module includes a pressure sensor, a Hall sensor and a computer. The pressure sensor is fixedly connected in the middle between the output end of the hydraulic press and the steel plate guide rod assembly. The Hall sensor and the electromagnet are fixed side by side on the mounting base. Both the pressure sensor and the Hall sensor are connected to the computer through a data transmission unit.

[0026] According to the stress modulation and magnetic detection synergistic detection method provided by the present invention, the above-mentioned stress modulation and magnetic detection synergistic integrated device is used for detection, and the detection method includes the following steps:

[0027] 1) Preparations before testing:

[0028] Based on the specimen parameters, the preset force loading module's tensile duration / force value and loading rate parameters, the preset data acquisition module's acquisition frequency parameters, and the preset magnetic detection module's magnetization intensity and lift-off value parameters;

[0029] 2) Specimen installation and fixing:

[0030] By adjusting the first clamping end of the clamping and fixing module, the specimen is clamped and fixed to the first clamping end and the second clamping end of the clamping and fixing module;

[0031] 3) Adjustment of the magnetic detection module:

[0032] Move the magnetic detection module above the area to be tested on the specimen, and after adjusting the lift-off value, start the magnetic detection module to magnetize the specimen according to the set magnetization intensity;

[0033] 4) Synchronous loading and signal acquisition:

[0034] After the magnetic field stabilizes, the starting force loading module applies tensile load according to the set loading rate. At the same time, the data acquisition module collects tensile force signals in real time and detects the change in magnetic induction intensity at the defect of the test piece. The data is transmitted to the computer in real time, and the computer dynamically displays the tensile force-time curve and the magnetic induction intensity-time curve.

[0035] 5) Data processing and defect analysis:

[0036] Based on synchronously acquired data and a preset algorithm, the computer establishes a correlation model between tensile force and magnetic induction intensity changes, and analyzes the location, size, and evolution of defects in the specimen.

[0037] 6) Device reset:

[0038] Once the preset stretching time or tensile force value is reached, the device is turned off and all components are reset to complete the test.

[0039] According to some embodiments of the detection method of the present invention, step 1) specifically includes:

[0040] Based on the material, size, and defect type of the specimen, the target tensile force, loading rate, sensor acquisition frequency, electromagnet magnetization current, and target lift-off value are set on the computer. The loading rate is 0.1-5 mm / min, the sensor acquisition frequency is 10-1000 Hz, the electromagnet magnetization current is 0.5-5 A, and the target lift-off value is 1-10 mm.

[0041] According to some embodiments of the detection method of the present invention, step 5) specifically includes:

[0042] First, the synchronously acquired data is filtered and noise-reduced by computer. Then, the peak detection method or slope analysis method preset by the computer is used as a defect judgment algorithm to analyze the correlation between the change of magnetic induction intensity and tensile force, and then output the defect location, size and evolution trend.

[0043] If abnormal tension or signal interference occurs during the testing process, the equipment will be paused via computer to troubleshoot the problem before testing continues.

[0044] According to some embodiments of the detection method of the present invention, step 6) specifically includes:

[0045] After the horizontal tensile force is applied, first shut down the force loading module to unload the tensile force, then shut down the magnetic detection module and the data acquisition module, and save all test data; then disassemble the specimen, clean the device and reset each component, and finally shut down all power to complete the testing process.

[0046] This invention provides an integrated device and method for stress regulation and magnetic detection. Utilizing integrated support, clamping, force loading, magnetic detection, and data acquisition modules, the synergistic cooperation of these modules achieves a fully integrated process encompassing mechanical tensile loading, precise magnetization, magnetic signal detection, and synchronous data acquisition. This allows for real-time capture of the dynamic changes in magnetic induction intensity at defects during specimen tensile testing. Furthermore, this integrated device provides an irreplaceable experimental platform for systematically studying the leakage magnetic response of different metallic materials under various stress states. It can be used to establish a quantitative model of the "material-stress-magnetic signal" relationship, providing a data foundation for material design and the development of non-destructive testing standards.

[0047] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0049] Figure 1 This is a schematic diagram of the main structure of an integrated stress regulation and magnetic detection device according to an embodiment of the present invention.

[0050] Figure 2 This is a bottom view of a stress regulation and magnetic detection integrated device according to an embodiment of the present invention.

[0051] Figure 3 This is a schematic diagram of the installation structure of the magnetic detection module in an integrated stress regulation and magnetic detection device according to an embodiment of the present invention.

[0052] Meaning of the labels in the attached diagram:

[0053] 1-Support module;

[0054] 11-Main reaction frame;

[0055] 12-Auxiliary reaction frame;

[0056] 13-Reinforced steel plate;

[0057] 14-Connecting rod;

[0058] 2-Clamping and fixing module;

[0059] 21-Modular fixture;

[0060] 22-Adjustable fixing clamp; 221-Threaded rod; 2211-Fixed end nut;

[0061] 23-Locking assembly; 231-Fixing plate; 232-Screw; 233-Nut;

[0062] 3-Force loading module;

[0063] 31-Hydraulic press;

[0064] 32-Steel plate guide rod assembly;

[0065] 33 - Universal hinge;

[0066] 4-Magnetic detection module;

[0067] 41-Electromagnet;

[0068] 42-Magnetic flux leakage detection bracket;

[0069] 43 - Height Adjustment Screw;

[0070] 44 - Mounting base;

[0071] 5-Data Acquisition Module;

[0072] 51 - Pressure sensor;

[0073] 52-Hall sensor;

[0074] 6-Test specimen. Detailed Implementation

[0075] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0076] Example 1

[0077] The following is based on Figures 1-3 The stress regulation and magnetic detection integrated device of the present invention will be described in detail.

[0078] like Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention provides an integrated device for stress regulation and magnetic detection, comprising a support module 1, a clamping and fixing module 2, a force loading module, a magnetic detection module 4, and a data acquisition module 5. Wherein:

[0079] The first clamping end of the clamping and fixing module 2 is adjustablely fixed to the support module 1, and its second clamping end is slidably disposed on the support module 1. The clamping and fixing module 2 is configured to clamp the specimen 6. The force loading module is disposed between the second clamping end of the support module 1 and the clamping and fixing module 2, and is configured to apply a horizontal tensile force to the specimen 6. The magnetic detection module 4 is adjustablely disposed on the support module 1, and is configured to perform magnetization and magnetic leakage detection on the specimen 6 with adjustable lift-off value and magnetization intensity. The data acquisition module 5 is disposed on the force loading module and the magnetic detection module 4, and is configured to acquire tensile force signals and magnetic induction intensity signals, and transmit the signal data to the computer in real time.

[0080] The stress control and magnetic detection integrated device of Embodiment 1 of the present invention uses the support module 1 as a carrier to integrate the clamping and fixing module 2, the force loading module, the magnetic detection module 4 and the data acquisition module 5 into one, realizing the deep integration of tensile loading, magnetization, magnetic detection and synchronous data acquisition functions. It is different from the existing independent equipment combination or simple splicing technical solutions and achieves the effect of closed-loop optimization of the detection process.

[0081] Please refer to Figure 1 and Figure 2 The support module 1 in Embodiment 1 of the present invention may include a main reaction frame 11, an auxiliary reaction frame 12 and a reinforcing steel plate 13; the main reaction frame 11 and the auxiliary reaction frame 12 are arranged in parallel and are connected laterally around the perimeter by connecting rods 14 to form a support frame, and the reinforcing steel plate 13 is integrally connected to the side of the support frame facing the force loading module.

[0082] More specifically, in Embodiment 1 of the present invention, the main reaction frame 11 is fixedly connected to the hydraulic press 31 to bear the reaction force generated when the hydraulic press 31 is working; the auxiliary reaction frame 12 cooperates with the adjustable fixing clamp 22; the reinforcing steel plate 13 is set at the key stress-bearing parts of the reaction frame, and the whole adopts a high-strength rigid structure to prevent the device from deforming.

[0083] Please refer to Figure 1 and Figure 2In Embodiment 1 of the present invention, the clamping and fixing module 2 includes a movable clamp 21, an adjustable fixing clamp 22, and a locking assembly 23. The adjustable fixing clamp 22 and the movable clamp 21 are arranged opposite to each other inside the support frame to form a clamping structure. Simultaneously, the adjustable fixing clamp 22 is slidably connected to the auxiliary reaction frame 12, and the movable clamp 21 is slidably connected to the main reaction frame 11. A threaded rod 221 is also fixedly connected to the end of the adjustable fixing clamp 22 facing away from the movable clamp 21. A fixed end nut 2211 is sleeved on the threaded rod 221. The cap 2211 is located on the outside of the adjustable fixing clamp 22. Rotating the fixing end cap 2211 can adjust and lock the horizontal position of the adjustable fixing clamp 22. The end of the movable clamp 21 away from the adjustable fixing clamp 22 is also connected to the force loading module. Locking components 23 are provided at both the upper and lower ends of the adjustable fixing clamp 22 and the movable clamp 21. The locking components 23 include a fixing plate 231, a screw 232 and a nut 233. The fixing plate 231 vertically presses and fixes the specimen 6 through the cooperation of the screw 232 and the nut 233.

[0084] Please refer to Figure 1 and Figure 2 The force loading module in Embodiment 1 of the present invention includes a hydraulic press 31, a steel plate guide rod assembly 32, and a universal hinge 33. The hydraulic press 31 is fixedly connected to the side of the main reaction frame 11 through a reinforcing steel plate 13. The output end of the hydraulic press 31 is fixedly connected to a steel plate end of the steel plate guide rod assembly 32. The guide rod end of the steel plate guide rod assembly 32 is connected to the movable clamp 21 through the universal hinge 33.

[0085] The force loading module of Embodiment 1 of the present invention has the following force transmission principle:

[0086] The thrust generated by the hydraulic press 31 is sequentially transmitted to the pressure sensor 51 and the steel plate guide rod assembly 32. After the assembly deviation is compensated by the universal hinge 33, it is converted into a horizontal tension on the specimen 6 through the movable clamp 21. The reaction force generated by the hydraulic press 31 is borne by the main reaction frame 11. The reinforced steel plate 13 enhances the rigidity of the reaction frame and prevents the device from deforming.

[0087] In practical implementation, the force transmission system adopts an innovative transmission chain of "hydraulic press 31-pressure sensor 51-guide rod-universal hinge 33-clamp", which is different from the rigid connection or single adjustment structure of the existing technology, and realizes the synergistic improvement of force transmission accuracy and deviation compensation capability.

[0088] Therefore, the beneficial effects that can be obtained based on the force loading module of Embodiment 1 of the present invention are as follows:

[0089] Precise control of force transmission: The universal hinge 33 compensates for assembly deviations within ±5°, blocking the transmission of additional bending moment to specimen 6. Combined with high-strength guide rods and rigid reaction frames, the tensile force transmission error is controlled within ±1%, improving the stability of force transmission.

[0090] Please refer to Figure 1 and Figure 3 The magnetic detection module 4 in Embodiment 1 of the present invention includes an electromagnet 41, a magnetic flux leakage detection bracket 42, and a height adjustment screw 43. The magnetic flux leakage detection bracket 42 is slidably connected to the top of the support frame and is used for horizontal position adjustment. That is, the magnetic flux leakage detection bracket 42 is straddling the auxiliary reaction frame 12 and the main reaction frame 11 and can slide in the horizontal direction. The electromagnet 41 is fixed to the bottom of the magnetic flux leakage detection bracket 42 by a mounting base 44. The height adjustment screw 43 passes through the magnetic flux leakage detection bracket 42 and is threadedly connected to the mounting base 44. Rotating the screw 232 can adjust the vertical height of the mounting base 44, which can accurately adjust the lift-off value between the two and the surface of the specimen 6. The adjustment range is 1-10mm, and the adjustment accuracy is 0.1mm.

[0091] In Embodiment 1 of the present invention, the electromagnet 41 is equipped with an adjustable power supply unit, which can continuously adjust the magnetization intensity by adjusting the input voltage, adapting to the magnetization requirements of specimens 6 of different materials and thicknesses, and avoiding detection errors caused by insufficient or excessive magnetization.

[0092] The magnetic detection module 4 of Embodiment 1 of the present invention has the following magnetization and detection principle:

[0093] Electromagnet 41 obtains a preset magnetization intensity through an adjustable power supply unit to uniformly magnetize specimen 6; when specimen 6 is subjected to tension, the magnetic circuit at the internal defect is distorted, resulting in a change in the magnetic induction intensity of the leakage magnetic field, and Hall sensor 52 captures this signal in real time.

[0094] In practice, the three-dimensional adaptation design of the magnetic detection module 4, which features "adjustable horizontal position + precise vertical height adjustment + adjustable magnetization intensity", is different from the existing magnetic detection structure that adjusts to a fixed position or a single dimension.

[0095] Therefore, the beneficial effects that can be obtained based on the magnetic detection module 4 of Embodiment 1 of the present invention are as follows:

[0096] Adjustable magnetic detection parameters: The horizontal position of the magnetic detection module 4 can be adjusted by a sliding bracket, and the lift-off value can be adjusted in the 0.1mm range by a high-precision screw 232. Combined with the adjustable magnetization intensity of the electromagnet 41, it can adapt to the detection needs of specimens 6 of different specifications and materials, and solve the problem of poor adaptability of existing devices.

[0097] Please refer to Figure 1 and Figure 2In Embodiment 1 of this invention, the data acquisition module 5 includes a pressure sensor 51, a Hall sensor 52, and a computer. The pressure sensor 51 is fixedly connected between the output end of the hydraulic press 31 and the steel plate guide rod assembly 32. The Hall sensor 52 and the electromagnet 41 are fixed side by side to the mounting base 44. Both the pressure sensor 51 and the Hall sensor 52 are connected to the computer via a data transmission unit, and can synchronously acquire tension signals and magnetic induction intensity signals. The acquisition frequency can be adjusted within the range of 10-1000Hz. The computer has built-in data storage, filtering, and defect analysis algorithms.

[0098] In practice, the power supply units of pressure sensor 51, Hall sensor 52 and electromagnet 41 are all connected to the computer through data transmission lines to realize signal transmission and parameter control.

[0099] The data acquisition module 5 of Embodiment 1 of the present invention has the following data synchronization principle:

[0100] Pressure sensor 51 collects tensile force signals, and Hall sensor 52 collects magnetic induction intensity signals. Both are transmitted synchronously to the computer at a preset frequency. The computer stores, displays, and performs preliminary processing of the data in real time, providing synchronous data support for defect analysis.

[0101] The beneficial effects obtained by the data acquisition module 5 based on Embodiment 1 of the present invention are as follows:

[0102] Data synchronization and intelligent analysis: The unified data acquisition module 5 is used to achieve millisecond-level synchronous acquisition of tensile and magnetic detection signals. The built-in defect analysis algorithm eliminates the need for manual data integration, improving detection efficiency and analysis accuracy.

[0103] Significantly improved data synchronization accuracy: Through the integrated and unified data acquisition module 5, the synchronization error between the tensile signal and the magnetic induction intensity signal is ≤1ms, effectively capturing the instantaneous correlation between defect evolution and stress change, and providing accurate data support for establishing a quantitative model of "stress-defect magnetic response".

[0104] Furthermore, the stress regulation and magnetic detection integrated device of Embodiment 1 of the present invention also has the following technical advantages:

[0105] The device can be repeatedly used to test specimens of different materials and specifications. The operation process is standardized and experiments can be completed without professional operators, meeting the needs of industrial applications and experimental teaching for batch use.

[0106] The device has controllable manufacturing costs, and its core components are innovative combinations of existing mature devices. No special processing technology is required, making it easy to industrialize and promote.

[0107] With high detection efficiency and strong data accuracy, it can be directly applied to scenarios such as the study of the correlation between mechanical and magnetic properties of materials and dynamic monitoring of defects, providing reliable data support for material performance evaluation and having significant technological advancement significance.

[0108] Example 2

[0109] Embodiment 2 of the present invention also provides a stress modulation and magnetic detection synergistic detection method, which uses the stress modulation and magnetic detection synergistic integrated device of Embodiment 1 above for detection.

[0110] Also refer to Figures 1 to 3 The detection method of Embodiment 2 of the present invention includes the following steps:

[0111] 1) Preparations before testing:

[0112] Based on the parameters of specimen 6, the pre-set parameters of the tensile duration / force value and loading rate of the pre-set force loading module, the pre-set parameters of the acquisition frequency of the pre-set data acquisition module 5, and the pre-set parameters of the magnetization intensity and lift-off value of the pre-set magnetic detection module 4.

[0113] In specific implementation, 1.1) check the status of each component of the device and debug the data communication between the sensor and the computer; more specifically, check the stability of the support frame and the reinforcing steel plate 13, and ensure that the hydraulic press 31, sensor, electromagnet 41 and other components are fault-free and the connection harness is reliable; 1.2) according to the material, size and defect type of the test piece 6, set the target tensile force value, loading rate, sensor acquisition frequency, electromagnet 41 magnetization current and target lift-off value on the computer, where the loading rate is 0.1-5mm / min, the sensor acquisition frequency is 10-1000Hz, the electromagnet 41 magnetization current is 0.5-5A and the target lift-off value is 1-10mm.

[0114] 2) Installation and fixing of specimen 6:

[0115] By adjusting the first clamping end of the clamping and fixing module 2, the specimen 6 is clamped and fixed to the first clamping end and the second clamping end of the clamping and fixing module 2.

[0116] In practice, the position of the adjustable fixing clamp 22 is adjusted, and the two ends of the specimen 6 are clamped to the movable clamp 21 and the adjustable fixing clamp 22 respectively. The locking component 23 is used to press and fix the specimen 6 to ensure that it is placed horizontally.

[0117] More specifically, rotate the fixed end nut 2211 to drive the adjustable fixing clamp 22 to move horizontally and adjust it to a position that matches the length of the specimen 6. Place one end of the specimen 6 into the clamping area of ​​the adjustable fixing clamp 22; move the other end of the specimen 6 to the clamping area of ​​the movable clamp 21 to ensure that the specimen 6 is horizontal and not tilted; tighten the screws 232 and nuts 233 at the upper and lower ends of the two clamps respectively, so as to drive the corresponding fixing plates 231 to vertically press the specimen 6 to achieve a firm fixation.

[0118] 3) Adjustment of magnetic detection module 4:

[0119] Move the magnetic detection module 4 above the area to be tested on the specimen 6, and after adjusting the lift-off value, start the magnetic detection module 4 to magnetize the specimen 6 according to the set magnetization intensity;

[0120] In practice, the magnetic flux leakage detection bracket 42 is moved above the area to be tested on the specimen 6, and the lift-off value is adjusted by the height adjustment screw 43. Then, the electromagnet 41 is started and magnetized according to the preset parameters.

[0121] More specifically, push the leakage magnetic field detection bracket 42 to move the electromagnet 41 and the Hall sensor 52 horizontally so that they are aligned directly above the area to be tested on the test piece 6; rotate the height adjustment screw 43 to adjust the vertical height of the electromagnet 41 and the Hall sensor 52; after confirming by computer-aided measurement that the lift-off value has reached the preset requirement, lock the height adjustment screw 43.

[0122] 4) Synchronous loading and signal acquisition:

[0123] After the magnetic field stabilizes, the starting force loading module applies tensile load according to the set loading rate. At the same time, the data acquisition module 5 collects tensile signals in real time and detects the change in magnetic induction intensity at the defect of the test piece 6. The data is transmitted to the computer in real time, and the computer dynamically displays the tensile force-time curve and the magnetic induction intensity-time curve.

[0124] 5) Data processing and defect analysis:

[0125] Based on synchronously acquired data and a preset algorithm, the computer establishes a correlation model between tensile force and magnetic induction intensity changes, and analyzes the location, size, and evolution of defects in specimen 6.

[0126] In practice, the synchronously acquired data is first filtered and noise-reduced by computer, and then the peak detection method or slope analysis method preset by the computer is used as a defect judgment algorithm to analyze the correlation between the change of magnetic induction intensity and tensile force, and then output the defect location, size and evolution trend.

[0127] If abnormal tension or signal interference occurs during the testing process, the equipment will be paused via computer to troubleshoot the problem before testing continues.

[0128] 6) Device reset:

[0129] Once the preset stretching time or tensile force value is reached, the device is turned off and all components are reset to complete the test.

[0130] In practice, after the horizontal tensile force is applied, the force loading module is first turned off to unload the tensile force, then the magnetic detection module 4 and the data acquisition module 5 are turned off, and all test data is saved; then the test piece 6 is disassembled, the device is cleaned and all components are reset, and finally all power is turned off to complete the test process.

[0131] More specifically, after reaching the preset stretching time or tensile force value, the loading function of the hydraulic press 31 is turned off, and the hydraulic press 31 is controlled to gradually unload the tensile force to zero; the power supply system and data acquisition software of the electromagnet 41 are turned off, and all test data are saved; the screw 232 and nut 233 are loosened, the fixing plate 231 is removed, the test piece 6 is released, and the adjustable fixing fixture 22 and the magnetic flux leakage detection bracket 42 are reset to their initial positions; the sensor detection surface and the fixture clamping surface are cleaned, all power is turned off, and the test process is completed.

[0132] The stress modulation and magnetic detection synergistic detection method according to Embodiment 2 of the present invention can bring at least the following technical advantages:

[0133] High force transmission accuracy: The deviation compensation function of the universal hinge 33 is combined with the rigid support structure (i.e. support frame) to achieve a tensile force transmission error of ≤±1%, which avoids the interference of additional bending moment on the test results and improves the measurement accuracy of mechanical parameters.

[0134] Wide testing adaptability: Based on the combined use of clamping and fixing module 2 and magnetic detection module 4, the lift-off value adjustment range is 1-10mm, the magnetization intensity is adjustable from 0.5-5A, and the clamping length is adapted to 50-300mm specimens 6, which can meet the testing needs of specimens 6 of different materials such as metals and alloys and different defect types.

[0135] Improved operational efficiency: The entire process of "installation-adjustment-testing-data processing" has been simplified, allowing a single person to complete the experiment. The testing cycle is shortened by more than 40% compared to the traditional operation of two sets of equipment.

[0136] High detection accuracy: The Hall sensor 52 has a magnetic induction intensity resolution of 0.01mT. Combined with precise magnetization control, it can detect micro-cracks and defects larger than 0.1mm, and the detection sensitivity is 30% higher than that of traditional combined devices.

[0137] In summary, the innovative features of the stress regulation and magnetic detection integrated device and detection method provided by this invention are as follows:

[0138] 1) An innovative composite force transmission structure of "universal compensation + rigid support" is proposed. The universal hinge 33 automatically compensates for assembly deviations and blocks additional bending moments, solving the problem of insufficient force transmission accuracy of traditional rigid connection. This design cannot be directly inspired by existing rigid connection or single hinge structure.

[0139] 2) The first-ever "horizontal sliding + high-precision vertical adjustment" magnetic detection module 4 adjustment mechanism achieves precise control of the lift-off value at the 0.1mm level. Combined with the adjustable magnetization intensity design of electromagnet 41, it breaks through the limitations of fixed magnetic detection parameters and poor adaptability of existing devices. Its adjustment logic and precision control method are non-obvious.

[0140] 3) The integrated technical solution of "loading-magnetization-detection-data synchronization" is not a simple splicing of existing independent equipment, but a solution that achieves synchronized data collection and intelligent analysis through collaborative design between modules, which solves the core pain points of process fragmentation and data asynchrony in traditional technologies.

[0141] In summary, the stress regulation and magnetic detection integrated device and method provided by this invention are particularly suitable for synchronous monitoring of magnetic signals during the evolution of defects in specimens under dynamic tensile loading. It can be widely applied to the study of the mechanical-magnetic property correlation of magnetic / weakly magnetic materials such as metals and alloys, dynamic defect analysis, and experimental teaching scenarios. Furthermore, it is suitable for online quality monitoring and safety assessment of industrial products, enabling rapid and accurate identification and quantification of defects in key components under simulated stress conditions. It is also suitable for the study of multi-physics coupling characteristics of materials, enabling the quantitative establishment of a constitutive relationship database of "stress-leakage magnetic field" for different metallic materials, serving the design and development of new materials. Finally, it is suitable for process optimization and verification, evaluating the impact of advanced joining and forming processes such as welding and additive manufacturing on material properties.

[0142] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0143] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0144] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0145] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A stress regulation and magnetic detection integrated device, characterized in that, include: Support module; A clamping and fixing module, wherein the first clamping end of the clamping and fixing module is adjustablely fixed to the support module, and the second clamping end is slidably disposed on the support module and configured for clamping the specimen; A force loading module is disposed between the second clamping end of the support module and the clamping and fixing module, and is configured to apply a horizontal tensile force to the specimen. A magnetic detection module is adjustablely disposed on the support module and configured to perform magnetization and magnetic leakage detection on the specimen with adjustable lift-off value and magnetization intensity. The system includes a data acquisition module, which is respectively located in the force loading module and the magnetic detection module, and is configured to acquire tensile force signals and magnetic induction intensity signals, and transmit the signal data to the computer in real time.

2. The integrated stress regulation and magnetic detection device according to claim 1, characterized in that, The support module includes a main reaction frame, an auxiliary reaction frame, and a reinforcing steel plate; the main reaction frame and the auxiliary reaction frame are arranged in parallel and are connected laterally around the perimeter by connecting rods to form a support frame, and the reinforcing steel plate is integrally connected to the side of the support frame facing the force loading module.

3. The stress regulation and magnetic detection integrated device according to claim 2, characterized in that, The clamping and fixing module includes a movable clamp, an adjustable fixing clamp, and a locking assembly; The adjustable fixed clamp and the movable clamp are arranged opposite to each other inside the support frame to form a clamping structure. At the same time, the adjustable fixed clamp is slidably connected to the auxiliary reaction frame, and the movable clamp is slidably connected to the main reaction frame. The adjustable fixing clamp is also fixedly connected to a threaded rod at the end opposite to the movable clamp. A fixed end nut is sleeved on the threaded rod. The fixed end nut is located on the outside of the adjustable fixing clamp. Rotating the fixed end nut can adjust and lock the horizontal position of the adjustable fixing clamp. The end of the movable clamp that faces away from the adjustable fixed clamp is also connected to the force loading module; Both the adjustable fixed clamp and the movable clamp are equipped with locking components at their upper and lower ends. The locking components include a fixing plate, a screw, and a nut. The fixing plate vertically presses and fixes the specimen through the cooperation of the screw and the nut.

4. The stress regulation and magnetic detection integrated device according to claim 3, characterized in that, The force loading module includes a hydraulic press, a steel plate guide rod assembly, and a universal hinge. The hydraulic press is fixedly connected to the side of the main reaction frame through the reinforcing steel plate. The output end of the hydraulic press is fixedly connected to one steel plate end of the steel plate guide rod assembly. The guide rod end of the steel plate guide rod assembly is connected to the movable clamp through the universal hinge.

5. The stress regulation and magnetic detection integrated device according to claim 4, characterized in that, The magnetic detection module includes an electromagnet, a magnetic flux leakage detection bracket, and a height adjustment screw; the magnetic flux leakage detection bracket is slidably connected to the top of the support frame for horizontal position adjustment; the electromagnet is fixed to the bottom of the magnetic flux leakage detection bracket via a mounting base, and the height adjustment screw passes through the magnetic flux leakage detection bracket and is threadedly connected to the mounting base.

6. The stress regulation and magnetic detection integrated device according to claim 5, characterized in that, The data acquisition module includes a pressure sensor, a Hall sensor, and a computer. The pressure sensor is fixedly connected between the output end of the hydraulic press and the middle of the steel plate guide rod assembly. The Hall sensor and the electromagnet are fixed side by side to the mounting base. Both the pressure sensor and the Hall sensor are communicatively connected to the computer through a data transmission unit.

7. A method for coordinated detection of stress modulation and magnetic detection, characterized in that, The detection method, which utilizes the integrated stress regulation and magnetic detection device according to any one of claims 1 to 6, comprises the following steps: 1) Preparations before testing: Based on the specimen parameters, the tensile duration / force value and loading rate parameters of the force loading module are preset, the acquisition frequency parameters of the data acquisition module are preset, and the magnetization intensity and lift-off value parameters of the magnetic detection module are preset. 2) Specimen installation and fixing: By adjusting the first clamping end of the clamping and fixing module, the specimen is clamped and fixed to the first clamping end and the second clamping end of the clamping and fixing module; 3) Adjustment of the magnetic detection module: Move the magnetic detection module above the area to be tested on the specimen, adjust the lift-off value, and then start the magnetic detection module to magnetize the specimen according to the set magnetization intensity. 4) Synchronous loading and signal acquisition: After the magnetic field stabilizes, the force loading module is activated to perform tensile loading at the set loading rate. At the same time, the tensile force signal is collected in real time based on the data acquisition module, and the change of magnetic induction intensity at the defect of the test piece is detected synchronously. The data is transmitted to the computer in real time, and the computer dynamically displays the tensile force-time curve and the magnetic induction intensity-time curve. 5) Data processing and defect analysis: Based on synchronously acquired data and a preset algorithm, the computer establishes a correlation model between tensile force and magnetic induction intensity changes, and analyzes the location, size, and evolution of defects in the specimen. 6) Device reset: Once the preset stretching time or tensile force value is reached, the device is turned off and all components are reset to complete the test.

8. The stress modulation and magnetic detection synergistic detection method according to claim 7, characterized in that, Step 1) specifically includes: Based on the material, size, and defect type of the specimen, the target tensile force, loading rate, sensor acquisition frequency, electromagnet magnetization current, and target lift-off value are set on the computer. The loading rate is 0.1-5 mm / min, the sensor acquisition frequency is 10-1000 Hz, the electromagnet magnetization current is 0.5-5 A, and the target lift-off value is 1-10 mm.

9. The stress modulation and magnetic detection synergistic detection method according to claim 7, characterized in that, Step 5) specifically includes: First, the synchronously acquired data is filtered and noise-reduced by computer. Then, the peak detection method or slope analysis method preset by the computer is used as a defect judgment algorithm to analyze the correlation between the change of magnetic induction intensity and tensile force, and then output the defect location, size and evolution trend. If abnormal tension or signal interference occurs during the testing process, the equipment will be paused via computer to troubleshoot the problem before testing continues.

10. The stress modulation and magnetic detection synergistic detection method according to claim 7, characterized in that, Step 6) specifically includes: After the horizontal tensile force is applied, the force loading module is first turned off to unload the tensile force, then the magnetic detection module and the data acquisition module are turned off, and all test data are saved; then the specimen is disassembled, the device is cleaned and all components are reset, and finally all power is turned off to complete the testing process.

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