A bearing internal contact state batch detection device based on a wave-shaped structure

Abstract

This invention discloses a batch testing device for the internal contact state of bearings based on a wave-shaped structure, relating to the field of bearing testing technology. It includes a testing support, a receiving groove formed on the testing support, and a wave-shaped testing module disposed within the receiving groove. The wave-shaped testing module includes a wave-shaped support plate and a conformal sensing module disposed on the wave-shaped support plate. The crest and trough structures of the wave-shaped support plate are respectively fitted to the bearing outer ring and the receiving groove. The conformal sensing module is disposed at the crest structure. By setting the wave-shaped testing module, its crest and trough structures form a stable fit with the bearing outer ring and the receiving groove, ensuring accurate testing while avoiding overheating at local measuring points.

Description

Technical Field

[0001] This invention relates to the field of bearing testing technology, and specifically to a batch testing device for the internal contact state of bearings based on a wave-shaped structure. Background Technology

[0002] Bearings, as a crucial component of mechanical equipment, support rotating parts and reduce friction during operation. Their internal contact conditions (including the magnitude and distribution of contact forces, and the integrity of the raceway surface) directly determine the bearing's operational accuracy, service life, and reliability, thus affecting the overall stability of the mechanical equipment. Currently, the detection of internal contact forces and raceway conditions in bearings primarily employs the strain gauge bonding method. By bonding strain gauges to the outer ring, inner ring, or near the raceway of the bearing, the strain-resistance characteristics of the strain gauges convert the contact stress during bearing operation into an electrical signal, thereby enabling the detection of the contact condition. However, this method suffers from several insurmountable drawbacks, severely limiting its detection efficiency and application scenarios, as follows: 1. Extremely low testing efficiency, unable to achieve batch testing: Existing methods require individual strain gauge arrangement for each bearing to be tested, and the preparation work for each bearing takes a long time, which greatly increases the testing cost and production cycle.

[0003] 2. The testing process is destructive and affects bearing performance: During the strain gauge bonding process, the bearing surface needs to be ground, cleaned, and even the surface anti-rust layer needs to be removed, which will cause certain damage to the bearing surface. At the same time, the bonded strain gauges and connecting wires will protrude from the bearing surface, which may interfere with the normal assembly and operation of the bearing. Especially for precision bearings, this will seriously affect their operating accuracy and service life.

[0004] 3. Poor adaptability and limited detection range: The bonding position of the strain gauge is limited by the bearing structure. For bearings with complex structures and small dimensions, it is difficult to find a suitable bonding position. In addition, the strain gauge itself has a certain volume and rigidity, which cannot be completely fitted with the curved surfaces of the bearing raceway, inner and outer rings, etc., resulting in deviations in the detection signal and failing to accurately reflect the actual contact state inside the bearing.

[0005] 4. High maintenance costs and poor reusability: Strain gauges pasted on the outer or inner ring surface of the bearing are mostly for single use. Disassembly can easily damage the bearing surface and the strain gauges themselves, making them unusable and further increasing testing costs.

[0006] In existing technologies, several intelligent bearing-related detection solutions have emerged, such as external sensors and embedded sensors. External sensors are attached to the bearing's outer ring, cage, or other locations, without altering the bearing's integrity, but they change the overall dimensions of the traditional bearing, making them unsuitable for the internal structure of existing bearing housings, inconvenient for bearing installation, and limiting their monitoring range. Embedded sensors require slotting or drilling into the bearing; while they can bring them closer to the signal source and improve detection accuracy, they compromise the bearing's integrity and service performance, and similarly cannot achieve batch testing. Furthermore, during bearing testing, heat dissipation is poor, easily causing overheating at localized measurement points.

[0007] Therefore, it is necessary to develop and design a batch testing device for the internal contact state of bearings based on a wave-shaped structure. This device should be able to ensure accurate testing without damaging the bearings and avoid overheating of local measuring points. This is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] To address the aforementioned issues, this invention provides a batch testing device for the internal contact state of bearings based on a wave-shaped structure. This device ensures accurate testing without damaging the bearing and avoids overheating at local testing points.

[0009] To achieve the above objectives, the present invention provides the following solution: A batch inspection device for the internal contact state of bearings based on a wave-shaped structure includes an inspection support, a receiving groove formed on the inspection support, and a wave-shaped inspection module disposed in the receiving groove. The wave-shaped inspection module includes a wave-shaped support plate and a conformal sensing module disposed on the wave-shaped support plate. The crest structure and trough structure of the wave-shaped support plate are respectively fitted to the outer ring of the bearing and the receiving groove. The conformal sensing module is disposed at the crest structure.

[0010] Preferably, a snap-fit ​​groove is provided on the mating surface between the wave crest structure and the outer ring of the bearing, and the conformal sensing module is disposed in the snap-fit ​​groove.

[0011] Preferably, the conformal sensing module is disposed on the end face of the wave crest structure away from the outer ring of the bearing.

[0012] Preferably, the material hardness of the crest structure and the trough structure is greater than the material hardness of the connection between the crest structure and the trough structure.

[0013] Preferably, the cross-section of the corrugated bearing plate is a semi-circular structure. Within the coverage area of ​​the semi-circular structure, the number of wave crest structures is consistent with the number of rollers in the bearing area of ​​the bearing under test, and the interval between adjacent wave crest structures is consistent with the azimuth angle between adjacent rollers.

[0014] Preferably, the number of the wave crest structures is the same as the number of the conformal sensing modules.

[0015] Preferably, the thickness of the corrugated bearing plate is 2% to 3% of the outer diameter of the bearing to be tested.

[0016] Preferably, the conformal sensing module is one of a flexible strain gauge, a carbon nanotube flexible sensing film, or a fiber optic grating sensing strip.

[0017] Preferably, the wave-shaped detection module further includes a signal acquisition module and a power supply module respectively disposed at both ends of the wave-shaped support plate, and a data transmission module electrically connected to the conformal sensing module, the signal acquisition module, and the power supply module. The signal acquisition module includes a signal conditioning circuit for amplifying, filtering, and denoising the electrical signal output by the conformal sensing module, an A / D converter for converting the conditioned analog signal into a digital signal, and a microcontroller for controlling the frequency and timing of signal acquisition and performing preliminary processing on the digital signal. The data transmission module adopts wireless or wired transmission, and the power supply module is a rechargeable lithium battery or a button battery.

[0018] Preferably, a flexible substrate is disposed between the conformal sensing module and the wave crest structure.

[0019] The present invention achieves the following technical effects compared to the prior art: By setting up a detection module with a corrugated bearing plate, and utilizing its crest and trough structures to form a stable fit with the bearing outer ring and the receiving groove respectively, the concave and convex structure of each crest and trough position of the corrugated structure can, under radial force, cause stress concentration, resulting in greater deformation at the corresponding groove position. This allows the strain measurement points arranged at the groove to obtain a greater strain response. Furthermore, the corrugated structure has less contact with the test bearing, only contacting each crest, trough, and end, resulting in very low heat transfer. It also facilitates heat dissipation in the axial direction, thus avoiding overheating of local measurement points and causing instability in the detection. This enables efficient, non-destructive, and batch testing of the internal contact state of the bearing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Appendix Figure 1 This is a schematic diagram of the bearing structure to be tested in the batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this invention. Appendix Figure 2 This is a schematic diagram of the main view structure of the wave-shaped bearing plate of the batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this invention. Appendix Figure 3 This is a three-dimensional structural schematic diagram of the wave-shaped bearing plate of the batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this invention. Appendix Figure 4 This is a top view structural schematic diagram of the wave-shaped detection module of the batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this invention. Appendix Figure 5 This is a schematic diagram of the overall three-dimensional structure of the batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this invention. Appendix Figure 6 This is a schematic diagram of the main view structure of the batch detection device for the internal contact state of bearings based on a wave-shaped structure after being embedded in the detection support, as disclosed in this invention. Appendix Figure 7 This is a schematic cross-sectional view of the wave-shaped detection module of the batch detection device for the internal contact state of bearings based on a wave-shaped structure, after it is embedded in the detection support, as disclosed in this invention. Among them, 1. Detection support; 2. Bearing outer ring; 3. Bearing inner ring; 4. Roller; 5. Crest structure; 6. Valley structure; 7. Conformal sensing module; 8. Receiving groove; 9. Signal acquisition module; 10. Power supply module; 11. Wiring groove; 12. Signal line; 13. Flexible substrate; 14. Wave-shaped detection module. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to provide a batch testing device for the internal contact state of bearings based on a wave-shaped structure, which can ensure accurate testing and avoid overheating of local measuring points without damaging the bearings.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] refer to Figures 1-7The batch detection device for the internal contact state of bearings based on a wave-shaped structure disclosed in this embodiment of the invention includes at least a detection support 1. A receiving groove 8 is provided on the detection support 1, and a wave-shaped detection module 14 is disposed within the receiving groove 8. The wave-shaped detection module 14 includes a wave-shaped support plate, and a conformal sensing module 7 is disposed on the wave-shaped support plate. The crest structure 6 and trough structure 5 of the wave-shaped support plate are respectively fitted to the outer ring 2 of the bearing and the receiving groove 8. The conformal sensing module 7 is disposed at the crest structure 6. By setting up a detection module with a wave-shaped support plate, and utilizing its crest structure 6 and trough structure 5 respectively to contact the bearing... The outer ring 2 and the receiving groove 8 form a stable fit. The concave and convex structure of each peak and trough of the wave-shaped structure can cause greater deformation at the groove position corresponding to the concave and convex structure through stress concentration when subjected to radial force. This allows the strain measurement points arranged at the groove to obtain a greater strain response. Furthermore, the wave-shaped structure has less contact with the test bearing, only contacting each peak and trough and the end. The heat transfer is very low, and heat dissipation is also convenient in the axial direction. This avoids the instability of the test caused by local overheating of the measurement points. Thus, it enables efficient, non-destructive, and batch testing of the internal contact state of the bearing.

[0026] It should be noted that the inner diameter of the corrugated bearing plate is adapted to the outer diameter of the bearing to be tested, and the outer diameter of the corrugated bearing plate is adapted to the inner diameter of the test support 1, which enables rapid assembly and positioning with the bearing without causing wear on the bearing surface. The bearing to be tested includes the inner ring 3, the roller 4, and the outer ring 2.

[0027] refer to Figure 1 In one embodiment, a snap-fit ​​groove is provided on the mating surface of the wave crest structure 6 and the bearing outer ring 2. The conformal sensing module 7 is disposed in the snap-fit ​​groove. By placing the conformal sensing module 7 on the mating surface of the wave crest structure 6 and the bearing outer ring 2, the maximum local deformation caused by stress concentration at the wave crest can be utilized to enable the sensor to obtain the strongest original strain signal, thereby significantly improving the detection sensitivity and signal-to-noise ratio. By providing a snap-fit ​​groove on the mating surface of the wave crest structure 6 and the bearing outer ring 2 and embedding the conformal sensing module 7 therein, the sensor module can be accurately positioned and reliably fixed, effectively preventing displacement due to vibration or impact during the detection process. This ensures that the spatial correspondence between the measuring point and the roller 4 contact pair remains consistent, thereby improving the repeatability and stability of the detection signal. At the same time, the limiting effect of the snap-fit ​​groove can reduce the dependence on adhesives, simplify the assembly process, and facilitate the rapid replacement and maintenance of the sensing module, further reducing detection costs and improving batch detection efficiency.

[0028] It should be noted that the conformal sensing module 7 can also be attached to the wave crest structure 6, and tiny raised blocks are set on both sides of the bottom of the snap-fit ​​groove. The raised blocks limit the conformal sensing module 7 in the circumferential direction.

[0029] refer to Figure 1 As one implementation method, the conformal sensing module 7 is located on the end face of the crest structure 6 away from the outer ring 2 of the bearing. This effectively avoids the sensing module directly bearing the friction, wear, and impact loads caused by the bearing operation, reducing the risk of sensor damage and extending its service life. At the same time, this location has more open space, which is convenient for arranging larger sensor types or those with requirements for installation direction. It is also beneficial for the routing of signal lines 12 and power lines, reducing the difficulty of internal integration. In addition, the sensing module is away from the bearing heat source, which can reduce the thermal impact of bearing temperature rise on sensor performance and improve the long-term stability of the detection signal.

[0030] As a preferred approach, the material hardness of the crest structure 6 and the trough structure 5 is greater than that of the material hardness at the connection between the crest structure 6 and the trough structure 5. By adopting a partitioned material design, the crest and trough regions have a higher material hardness than the connection, which can ensure structural rigidity in the critical load-bearing area of ​​stress concentration. This ensures efficient and distortion-free transmission of strain in the outer ring 2 of the bearing and improves the signal acquisition accuracy of the conformal sensing module 7. The connection uses a relatively flexible material, which can act as a buffer layer to effectively absorb and attenuate the vibration energy generated by the bearing operation, reduce the impact of impact loads on the sensing unit, and at the same time, the low stiffness of the flexible region allows the wave-shaped body to produce controllable elastic deformation under radial load, avoiding stress concentration leading to structural fatigue failure. This achieves synergistic optimization in four aspects: signal fidelity, vibration damping capability, lightweight, and fatigue life.

[0031] refer to Figures 1-3 As one implementation method, the number of wave crest structures 6 is consistent with the number of rollers 4 in the load-bearing area of ​​the bearing under test, and the interval between adjacent wave crest structures 6 is consistent with the azimuth angle between adjacent rollers 4. By making the number of wave crest structures 6 the same as the number of rollers 4 in the load-bearing area of ​​the bearing under test, and ensuring that the circumferential interval between adjacent wave crests is consistent with the azimuth angle between adjacent rollers 4, a one-to-one correspondence between each wave crest and each roller 4 can be achieved. This ensures that the conformal sensing module 7 is precisely aligned in space with each group of rollers 4 and raceway contact pairs, thereby capturing the independent strain response of each roller 4 when passing through the load-bearing area during bearing operation, avoiding signal aliasing or missed detection, and providing reliable data support for the refined identification of load distribution, roller 4 misalignment, and local faults.

[0032] It should be noted that the cross-section of the corrugated bearing plate is a semi-circular structure. In this case, the circumferential spacing between the wave crests 6 is consistent with the azimuth angle between adjacent rollers 4. Within the coverage area of ​​the semi-circular bearing plate, the number of wave crests corresponds to the number of rollers 4 in the bearing area, and the circumferential spacing between adjacent wave crests is precisely matched with the azimuth angle of the corresponding roller 4. This ensures that each roller 4 entering the bearing area can be captured by the corresponding wave crest position when it passes through, thereby realizing independent and synchronous detection of the contact state of each roller 4 in this area. At the same time, since the semi-circular structure only covers the bearing area, it can effectively reduce the redundant arrangement of wave crests and sensors in the non-bearing area, reduce manufacturing difficulty and material cost, and reduce the radial size of the sensing unit, making it easier to install in a limited space.

[0033] It should be noted that multiple conformal sensing modules 7 can be set along the axial direction of the corrugated bearing plate according to the number of rows of rollers 4.

[0034] refer to Figure 1 As one implementation method, the number of peak structures 6 is consistent with the number of conformal sensing modules 7. By keeping the number of peak structures 6 consistent with the number of conformal sensing modules 7, each peak structure 6 can be independently configured with a corresponding sensing module, ensuring that each measurement point has a dedicated sensing channel, avoiding signal crosstalk and coupling errors caused by multiple measurement points sharing modules, thereby improving the independence and accuracy of the detection data.

[0035] refer to Figure 1 As one implementation method, the thickness of the corrugated bearing plate is 2% to 3% of the outer diameter of the bearing to be measured. This thickness is thin enough that the small strain generated by the outer ring 2 of the bearing under radial load can be transmitted to the conformal sensing module 7 at the bottom of the corrugated groove with a low attenuation rate, ensuring the sensitivity and authenticity of the detection signal. Moreover, this thickness is sufficient to maintain the structural rigidity and fatigue strength of the bearing plate under repeated stress, avoiding plastic deformation or fracture due to excessive wall thickness, while ensuring that excessive deformation does not occur during assembly and disassembly, and ensuring the reusability accuracy of the sensing unit.

[0036] refer to Figure 4 In one implementation, the conformal sensing module 7 is one of a flexible strain gauge, a carbon nanotube flexible sensing film, or a fiber optic grating sensing strip.

[0037] refer to Figure 1In one implementation, a signal acquisition module 9 and a power supply module 10 are respectively provided at both ends of the corrugated support plate, and a data transmission module is also included. The data transmission module is electrically connected to the conformal sensing module 7, the signal acquisition module 9, and the power supply module 10. The signal acquisition module 9 includes a signal conditioning circuit, an A / D converter, and a microcontroller. The signal conditioning circuit is used to amplify, filter, and denoise the weak electrical signal output by the conformal sensing module 7, remove external interference signals (such as electromagnetic interference), and improve the signal-to-noise ratio. The A / D converter is used to convert the conditioned analog signal into a digital signal. The microcontroller is used to control the frequency and timing of signal acquisition and to perform preliminary processing on the digital signal (such as data calibration and anomaly identification) to ensure the accuracy and stability of the detected signal. The signal acquisition module 9 is integrated at the end of the sensing body, is compact, and does not affect the assembly of the sensing body and the bearing.

[0038] The data transmission module adopts wireless transmission (such as Bluetooth, WiFi, LoRa) or wired transmission. Wireless transmission enables contactless data transmission, avoiding interference from wires to bearing operation and batch testing, and is suitable for large-scale batch testing scenarios. Wired transmission uses waterproof and wear-resistant shielded wires, which is suitable for scenarios with high requirements for data transmission stability. The data transmission module can transmit the test data processed by the signal acquisition module 9 to external terminals (such as computers and testing instruments) in real time, realizing real-time monitoring and analysis of the data.

[0039] The power supply module 10 uses a rechargeable lithium battery or button battery, which is integrated into the end of the sensor body. It is small in size and has a long battery life. A single charge can meet the batch testing needs of at least 100 bearings. At the same time, the power supply module 10 has a low battery reminder function, which makes it easy to charge or replace the battery in time and ensure the continuous operation of the testing work.

[0040] It should be noted that when the data transmission module adopts wired transmission, a radially extending cable tray 11 is provided on the mating surface of the corrugated structure 5 and the receiving groove 8. The signal line 12 is set in the cable tray 11, and the signal acquisition module 9 and the power supply module 10 are set on the side of the corrugated support plate close to the receiving groove 8 for easy cable routing.

[0041] refer to Figure 4 As one implementation method, a flexible substrate 13 is provided between the conformal sensing module 7 and the wave crest structure 6, which can effectively buffer the vibration and impact load transmitted to the wave crest structure 6 during the operation of the bearing, reduce the risk of sensor damage or signal distortion due to instantaneous overload, and extend the service life of the sensing module.

[0042] During testing, whenever a roller 4 rolls over a measurement point corresponding to a conformal sensing module 7, the conformal sensing module 7 will output a weak electrical signal. Then, the signal acquisition module 9 can amplify, filter, and denoise the signal. The conditioned signal can be transmitted wirelessly or via wired transmission to a computer or testing instrument for analysis.

[0043] The effects of the present invention also include: 1. Strong conformal fit and high detection accuracy: The wave-shaped detection module 14 is perfectly adapted to the outer surface of the bearing, which can achieve a tight conformal fit with a very small fit gap (not greater than 0.1mm). This ensures the strain transmission efficiency from the surface of the outer ring 2 of the bearing to the bottom surface of the wave crest structure 6 of the wave-shaped detection module 14. There is no extra conductive medium between the conformal sensing module 7, the signal acquisition module 9, and the power supply module 10, resulting in a more realistic sensing signal that can accurately reflect the actual working condition of the bearing.

[0044] 2. Reusable and low testing cost: The wave-shaped detection module 14 is an independent structure and does not need to be pasted on the bearing surface. During testing, the bearing and the sensing body can be assembled. After the test is completed, the bearing can be quickly disassembled. The sensing unit can be reused, which greatly reduces the testing cost and avoids the waste of traditional strain gauges that are used only once.

[0045] 3. Non-destructive testing, does not affect bearing performance: During the testing process, there is no need to grind or clean the bearing surface, which will not damage the bearing surface and anti-rust layer, nor will it interfere with the normal assembly and operation of the bearing. It is suitable for the testing of precision bearings and solves the problem of damage to bearings caused by traditional strain gauge testing and embedded sensor testing.

[0046] 4. High degree of integration and convenient operation: The conformal sensing module 7, signal acquisition module 9, data transmission module and power supply module 10 are integrated into the wave-shaped detection module 14. The structure is compact and the size is small. There is no need to arrange complicated wiring and equipment. During operation, you only need to put the bearing on the sensing body and start the detection. No professional operators are required, which reduces the difficulty of operation.

[0047] 5. Multi-parameter synchronous detection with comprehensive functions: It can simultaneously detect the magnitude and distribution of internal contact forces in the bearing, as well as the wear, scratches, fatigue spalling, and other conditions on the raceway surface. Compared with traditional single-parameter detection schemes, it can more comprehensively reflect the internal contact state of the bearing, providing richer data support for bearing quality assessment and fault diagnosis. It functions similarly to a multi-parameter sensor but is more suitable for batch testing scenarios.

[0048] Furthermore, the wave-shaped structure is the key structure for achieving batch detection, improving detection accuracy, and enhancing adaptability in this invention. Its advantages are mainly reflected in the following aspects: 1. Wave-shaped structures can generate large deformation and obtain a greater strain response: Each crest and trough of a wave-shaped structure has a unique protrusion. When subjected to radial force, stress concentration can cause a greater deformation at the slot corresponding to the protrusion, thereby allowing the strain measurement points arranged at the slot to obtain a greater strain response.

[0049] 2. The wave-shaped structure can avoid overheating at the strain measurement point: In actual bearing fault detection, the bearing needs to run for a long time under different speed conditions. Continuous monitoring will cause the bearing temperature to rise gradually. The wave-shaped structure has less contact with the test bearing, and only makes contact at each peak and trough and end. The heat transferred is very low. At the same time, it is also convenient for heat dissipation in the axial direction, thus avoiding local overheating of the measurement point and causing instability in the test.

[0050] 3. The wave-shaped structure can achieve lightweighting, reduce redundant materials, and provide more space for sensor placement: Under the premise of ensuring the overall structural rigidity, the wave-shaped geometry can reduce more material in the radial and axial directions, resulting in a significant reduction in radial wall thickness. This provides more space for sensor placement in the radial direction. More strain measurement points and more other types of sensors can be placed at the positions of the crest structure 6 and the trough structure 5.

[0051] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A batch detection device for the internal contact state of bearings based on a wave-shaped structure, characterized in that, The device includes a detection support (1), a receiving groove (8) opened on the detection support (1), and a wave-shaped detection module (14) disposed in the receiving groove (8). The wave-shaped detection module (14) includes a wave-shaped support plate and a conformal sensing module (7) disposed on the wave-shaped support plate. The crest structure (6) and trough structure (5) of the wave-shaped support plate are respectively attached to the outer ring of the bearing (2) and the receiving groove (8). The conformal sensing module (7) is disposed at the crest structure (6).

2. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The crest structure (6) and the outer ring (2) of the bearing are provided with a snap-fit ​​groove, and the conformal sensing module (7) is disposed in the snap-fit ​​groove.

3. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The conformal sensing module (7) is disposed on the end face of the crest structure (6) away from the outer ring (2) of the bearing.

4. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The material hardness of the crest structure (6) and the trough structure (5) is greater than the material hardness at the connection between the crest structure (6) and the trough structure (5).

5. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The cross-section of the wave-shaped bearing plate is a semi-circular structure. Within the coverage area of ​​the semi-circular structure, the number of wave crest structures (6) is consistent with the number of rollers (4) in the bearing area of ​​the bearing to be tested, and the interval between adjacent wave crest structures (6) is consistent with the azimuth angle between adjacent rollers (4).

6. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 5, characterized in that, The number of the wave crest structures (6) is the same as the number of the conformal sensing modules (7).

7. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The thickness of the corrugated bearing plate is 2% to 3% of the outer diameter of the bearing to be tested.

8. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The conformal sensing module (7) is one of a flexible strain gauge, a carbon nanotube flexible sensing film, or a fiber optic grating sensing strip.

9. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, The wave-shaped detection module (14) also includes a signal acquisition module (9) and a power supply module (10) respectively disposed at both ends of the wave-shaped carrier plate, and a data transmission module electrically connected to the conformal sensing module (7), the signal acquisition module (9) and the power supply module (10). The signal acquisition module (9) includes a signal conditioning circuit for amplifying, filtering and denoising the electrical signal output by the conformal sensing module (7), an A / D converter for converting the conditioned analog signal into a digital signal, and a microcontroller for controlling the frequency and timing of signal acquisition and performing preliminary processing on the digital signal. The data transmission module adopts wireless transmission or wired transmission, and the power supply module (10) is a rechargeable lithium battery or a button battery.

10. The batch detection device for the internal contact state of bearings based on a wave-shaped structure according to claim 1, characterized in that, A flexible substrate (13) is provided between the conformal sensing module (7) and the wave crest structure (6).

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