Multi-sensor sound and vibration integrated testing device

Abstract

The invention discloses a multi-sensor sound and vibration integrated testing device, and the device comprises a jig which is provided with a sound guide channel and a flexible sound guide cylinder, and the lower end of the flexible sound guide cylinder is in butt joint with the upper end of the sound guide channel; when the upper curved surface of the flexible sound guide cylinder is attached to the lower surface of the to-be-tested product, the sound guide channel forms a sealed space; the automatic pressing mechanism comprises a profiling pressing block and a pressing driving module used for driving the profiling pressing block to press the to-be-tested product, and the profiling pressing block is provided with a bone conduction sensor used for detecting vibration / sound generated when the to-be-tested product runs; the sound collection assembly comprises a first microphone which is arranged in the jig and is exposed in the sound guide channel, a sound amplifier which is arranged at the lower end of the sound guide channel, and a second microphone which is arranged at the output end of the sound amplifier; sound generated when the to-be-tested product runs is transmitted to the first microphone through the flexible sound guide cylinder and the sound guide channel so as to be received by the first microphone, and the sound is amplified by the sound amplifier and then received by the second microphone.

Description

Technical Field

[0001] This invention relates to the field of abnormal sound detection technology, and specifically to a multi-sensor integrated acoustic and vibration testing device. Background Technology

[0002] Motor (electric motor) noise detection is a technology based on acoustic signal analysis that uses abnormal sounds or vibrations to determine whether a motor is operating normally. Currently, motor manufacturers still primarily use manual listening and touch to test for motor noise and vibration defects in over 90% of cases. However, due to the subjectivity of human hearing, a standardized and quantifiable approach cannot be established. Furthermore, the fatigue of the human ear often leads to inaccurate judgments, frequently resulting in defective products reaching customers and causing quality issues. This also contributes to hearing and physical strain on employees.

[0003] Existing motor noise detection equipment typically uses microphones to directly capture and analyze sound. Sound is transmitted directly through the air, and then the sound signal is analyzed for differences in the frequency spectrum. Sufficient control examples (high-quality motor samples and substandard motor samples) are collected beforehand offline, and relevant weight parameters are trained and assigned to the frequency spectrum to highlight potential defects.

[0004] See Chinese invention patent CN119125874B, which discloses a "stepper motor fault detection method and system based on noise"; see Chinese invention patent CN117268528B, which discloses a "motor noise detection device".

[0005] The existing motor noise detection equipment may have the following problems: (1) The abnormal noises caused by defects in the motor may not be very different, making it difficult to accurately determine whether it is a motor abnormality; (2) During the process of detecting abnormal noise in a motor, a relatively quiet environment needs to be set up to avoid external environmental noise from contaminating the collected sound signal and causing incorrect judgments. This means that existing motor noise detection equipment usually needs to be equipped with a large chamber to isolate the external environment, resulting in a large overall size of the noise detection equipment.

[0006] To address the above problems, the inventors propose the following technical solutions. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-sensor integrated acoustic and vibration testing device.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A multi-sensor integrated acoustic and vibration testing device includes: a fixture, in which a sound-conducting channel is provided; a flexible sound-conducting cylinder for fitting against the product to be tested is provided on the upper part of the fixture; the upper end of the flexible sound-conducting cylinder has an upper curved surface that can fit against the lower surface of the product to be tested, and the lower end of the flexible sound-conducting cylinder is connected to the upper end of the sound-conducting channel; when the upper curved surface of the flexible sound-conducting cylinder fits against the lower surface of the product to be tested, a sealed space is formed in the sound-conducting channel; and an automatic pressing mechanism, which includes a contouring pressing block and a mechanism for driving the contouring pressing block to press against the product to be tested. The flexible sound guide tube presses against the product under test, and the contoured pressure block is equipped with a bone conduction sensor for detecting vibrations / sounds generated during the operation of the product under test. The sound collection assembly includes a first microphone disposed within the fixture and exposed in the sound guide channel, a sound amplifier disposed at the lower end of the sound guide channel, and a second microphone disposed at the output end of the sound amplifier. The sound generated during the operation of the product under test is transmitted to the first microphone through the flexible sound guide tube and the sound guide channel for reception by the first microphone, and is also amplified by the sound amplifier before being received by the second microphone.

[0009] Furthermore, in the above technical solution, the fixture includes a base and a fixture seat that is sealed and assembled on the base by a sealing ring. The fixture seat is provided with a sound guiding channel that runs through the upper and lower end faces. The first microphone is disposed in the fixture seat. The sound amplifier is mounted on the base by a first soft rubber pad, and the front end of the sound amplifier is embedded in the lower end of the sound guiding channel.

[0010] Furthermore, in the above technical solution, the fixture has a first mounting hole on its side that provides a through sound guiding channel; the first microphone is inserted into the first soft rubber sleeve, and the first soft rubber sleeve is inserted and fixed in the first mounting hole, so that the first microphone and the first mounting hole form a sealed assembly.

[0011] Furthermore, in the above technical solution, the output end of the sound amplifier has a cylindrical structure, and a second soft rubber sleeve is fitted on the outside of the output end. The second microphone passes through the second soft rubber sleeve and forms a sealed assembly.

[0012] Furthermore, in the above technical solution, the upper end of the fixture is provided with an installation groove that connects to the sound guiding channel, and a dustproof mesh is fixed at the bottom of the installation groove, which covers the sound guiding channel; the flexible sound guiding cylinder is embedded and fixed in the installation groove, and the positioning ribs on the periphery of the flexible sound guiding cylinder are pressed into the positioning groove provided on the inner wall of the installation groove.

[0013] Furthermore, in the above technical solution, the bottom of the mounting groove is also locked with an annular pressure plate by screws, which presses against the outer edge of the dustproof mesh.

[0014] Furthermore, in the above technical solution, the upper end of the fixture base is provided with a first limiting plate and a second limiting plate that are relatively distributed and used to position the product to be tested. The relative positions of the first limiting plate and the second limiting plate can be adjusted relative to the upper end of the fixture base.

[0015] Furthermore, in the above technical solution, the clamping drive module and the fixture are fixed on the shock absorber plate. The lower end of the shock absorber plate is mounted on the base plate in a floating manner through several spring seats. The lower end of the base plate is provided with multiple rubber shock absorber seats. Each spring seat includes an upper seat body and a lower seat body, as well as multiple support springs disposed between the upper seat body and the lower seat body. The upper seat body is fixedly connected to the lower end face of the shock absorber plate, and the lower seat body is fixedly connected to the upper end face of the base plate.

[0016] Furthermore, in the above technical solution, the conforming pressure block is equipped with an FSR sensor for detecting the clamping force; the clamping drive module includes a support frame, a lifting frame movably mounted on the support frame via a guide rod assembly, a lifting drive component for driving the lifting frame to move up and down relative to the support frame, and a bidirectional floating assembly mounted on the lower end of the lifting frame that can elastically swing horizontally and elastically float vertically. The conforming pressure block is mounted on the lower end of the bidirectional floating assembly and is located above the fixture; the wires of the FSR sensor and the bone conduction sensor both pass through the lifting frame and then through the central channel of the guide rod in the guide rod assembly, extending to the lower end of the support frame and electrically connected to a terminal block mounted on the side of the support frame.

[0017] Furthermore, in the above technical solution, the bidirectional floating assembly includes a swing seat, a swing shaft fixed to the upper end of the swing seat and passing through a strip-shaped swing hole provided in the lifting frame, a plurality of guide screws passing through the upper right and downward through the movable holes provided in the swing seat and spirally fixed to the upper end of the contouring pressure block, longitudinal springs sleeved on the outside of the guide screws and respectively contacting the lower end face of the swing seat and the upper end face of the contouring pressure block, a pin provided on the upper end of the swing shaft and rotatably connected to the strip-shaped swing hole, a first stop block and a second stop block provided on the upper end of the lifting frame and distributed on both sides of the upper end of the swing shaft, a first transverse spring installed between the first stop block and one side of the swing shaft, and a second transverse spring installed between the second stop block and the other side of the swing shaft.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. In practical use, the present invention places the product to be tested on the flexible sound guide tube of the fixture, with the upper curved surface of the flexible sound guide tube fitting and sealing against the lower surface of the product to be tested. Then, the pressing drive module drives the contouring block to press against the product to be tested, cooperating with the flexible sound guide tube to press the product to be tested, so that the sound guide channel forms a sealed space. When the product to be tested is powered on, the sound generated by the product to be tested is transmitted through the sound guide tube and the sound guide channel to the first microphone for reception, which is designated as signal A. At the same time, the sound is amplified by the sound amplifier and received by the second microphone, designated as signal B. The bone conduction sensor on the contouring block detects the vibration / sound generated by the product to be tested during operation, designated as signal C. In this way, the sound signals generated by the product to be tested during operation are used in three different ways, and these signals are transmitted to a computer or other devices for analysis to achieve abnormal sound detection. Among them, the analysis of three signals can more accurately determine whether the product to be tested has defects that cause abnormal sounds, and determine whether the product to be tested has any abnormalities.

[0019] 2. This invention employs a flexible sound guide tube directly attached to the lower surface of the product under test, which is then pressed onto the product by a contoured pressure block. This causes the flexible sound guide tube to undergo slight deformation, ensuring a tight seal and creating a sealed space for the sound channel. This allows the sound signal from the product under test to be directly transmitted to the sound collection component via the flexible sound guide tube and the sound channel, avoiding interference from external noise and improving detection accuracy. Simultaneously, the overall size of the device is significantly reduced. Furthermore, the bone conduction sensor on the contoured pressure block detects the vibrations / sound generated by the product under test during operation, and is unaffected by external noise. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a diagram of the internal structure of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is a perspective view of the fixture in this invention; Figure 6 This is a structural diagram of the fixture and the product to be tested assembled in this invention; Figure 7 This is an exploded view of the fixture in this invention. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0022] See Figure 1-7As shown, a multi-sensor integrated acoustic and vibration testing device includes: a fixture 1, a flexible sound guide tube 2, an automatic clamping mechanism 3, and a sound collection component 4.

[0023] The fixture 1 is provided with a sound guiding channel 10. The upper part of the fixture 1 is provided with a flexible sound guiding cylinder 2 for contacting the product 100 to be tested. The flexible sound guiding cylinder 2 is integrally formed from a flexible material such as rubber, silicone rubber, or silicone. The upper end of the flexible sound guiding cylinder 2 has an upper curved surface 21 that can contact the lower surface of the product 100 to be tested, and the lower end of the flexible sound guiding cylinder 2 is aligned with the upper end of the sound guiding channel 10. When the upper curved surface 21 of the flexible sound guiding cylinder 2 is in contact with the lower surface of the product 100 to be tested, a stable sealed contact is formed, making the sound guiding channel 10 a sealed space. The automatic pressing mechanism 3 includes... The conforming pressure block 31 and the pressing drive module 32 for driving the conforming pressure block 31 to press against the product under test 100 in conjunction with the flexible sound guide tube 2 to press the product under test 100 are provided. The conforming pressure block 31 is provided with a bone conduction sensor 302 for detecting the vibration / sound generated by the product under test 100 during operation. The sound collection assembly 4 includes a first microphone 41 disposed in the fixture 1 and exposed in the sound guide channel 10, a sound amplifier 42 disposed at the lower end of the sound guide channel 10, and a second microphone 43 disposed at the output end of the sound amplifier 42. In this embodiment, the product under test 100 is a motor. In practical use, the product to be tested 100 is placed on the flexible sound guide tube 2 of the fixture 1, and the upper curved surface 21 of the flexible sound guide tube 2 is fitted and sealed with the lower surface of the product to be tested 100. Then, the compression drive module 32 drives the contoured pressure block 31 to press on the product to be tested 100 to cooperate with the flexible sound guide tube 2 to press the product to be tested 100, so that the sound guide channel 10 forms a sealed space. When the product to be tested 100 is powered on, the sound generated by the product to be tested 100 during operation is transmitted through the sound guide tube and the sound guide channel 10 to the first microphone 41 for reception, which is designated as signal A. Simultaneously, the sound is amplified by the sound amplifier 42 and received by the second microphone 43, designated as signal B; and the bone conduction sensor 302 on the contouring block 31 detects the vibration / sound generated by the product under test 100 during operation, designated as signal C. In this way, the sound signals generated by the product under test 100 during operation are used in three different ways, and these signals are transmitted to a computer or the like for analysis to achieve abnormal sound detection. Among them, the analysis of the three signals can more accurately determine whether the product under test 100 has defects that cause abnormal sounds, and determine whether the product under test 100 has any abnormalities.This invention employs a flexible sound guide tube 2 directly attached to the lower surface of the product under test, and then a contoured pressure block 31 presses it onto the product under test 100, causing the flexible sound guide tube 2 to undergo slight deformation to ensure a tight seal. This creates a sealed space in the sound channel 10, allowing the sound signal from the product under test 100 during operation to be directly transmitted to the sound collection assembly 4 through the flexible sound guide tube 2 and the sound channel 10. This avoids interference from external noise on the collected sound, improves the accuracy of the test, and significantly reduces the overall size of the device. In addition, the bone conduction sensor 302 on the contoured pressure block 31 detects the vibration / sound generated by the product under test 100 during operation, and is also unaffected by external noise.

[0024] The fixture 1 includes a base 11 and a fixture seat 12 sealed and assembled on the base 11 by a sealing ring 13. The base 11 is made of aluminum alloy, the fixture seat 12 is made of POM material, and the sealing ring 13 is in a compressed state, so that the fixture seat 12 and the base 11 form a sealed assembly.

[0025] The fixture base 12 is provided with a sound guide channel 10 that runs through the upper and lower end faces. The first microphone 41 is disposed in the fixture base 12. The sound amplifier 42 is mounted on the base 11 through the first soft rubber pad 420, and the front end of the sound amplifier 42 is embedded in the lower end of the sound guide channel 10, thereby reducing the impact of external vibration on the sound amplifier 42.

[0026] The specific assembly structure of the first microphone 41 and the fixture 1 is as follows: the fixture 1 has a first mounting hole 101 on its side that passes through the sound guiding channel 10; the first microphone 41 is inserted into the first soft rubber sleeve 410, and the first soft rubber sleeve 410 is inserted and fixed in the first mounting hole 101, so that the first microphone 41 and the first mounting hole 101 form a sealed assembly, thereby preventing the sound guiding channel 10 from communicating with the outside through the first mounting hole 101, and thus ensuring the airtightness of the sound guiding channel 10.

[0027] The output end 421 of the sound amplifier 42 has a cylindrical structure. The output end 421 is covered with a second soft rubber sleeve 430. The second microphone 43 is inserted into the second soft rubber sleeve 430 and forms a sealed assembly, so that the second microphone 43 can better receive the sound generated by the sound amplifier 42.

[0028] The assembly structure of the fixture 1 and the flexible sound guide tube 2 is as follows: the upper end of the fixture 1 is provided with an installation groove 102 communicating with the sound guide channel 10. The flexible sound guide tube 2 is embedded and fixed in the installation groove 102 and fastened by an interference fit. The positioning ribs 22 on the periphery of the flexible sound guide tube 2 are pressed into the positioning grooves 103 provided on the inner wall of the installation groove 102 to achieve stable assembly. A dustproof mesh 14 is fixed to the bottom of the installation groove 102, covering the sound guide channel 10. This prevents foreign objects from entering the sound guide channel 10 and affecting the detection of abnormal sounds. When placing the product to be tested 100, first observe whether there are foreign objects on the dustproof mesh 14. If so, clean it first before placing the product to be tested 100.

[0029] The outer edge of the dustproof mesh 14 can be fixed to the bottom of the mounting groove 102 by adhesive. Later, the lower end of the flexible sound guide tube 2 will also press down on the outer edge of the dustproof mesh 14. Alternatively, the bottom of the mounting groove 102 can be locked with a ring pressure plate 15 by screws. The ring pressure plate 15 presses down on the outer edge of the dustproof mesh 14. This method allows for the replacement of the dustproof mesh 14, making it more convenient to use.

[0030] In order to better limit the product to be tested 100, the following design was also made: the upper end of the fixture seat 12 is provided with a first limiting plate 121 and a second limiting plate 122 that are relatively distributed and used to position the product to be tested 100. The relative positions of the first limiting plate 121 and the second limiting plate 122 can be adjusted relative to the upper end of the fixture seat 12. The fixture base 12 has a row of spaced first screw holes 123 and a row of spaced second screw holes 124 on both sides of its upper end. The first limiting plate 121 has a first strip hole 125 and a second strip hole 126 corresponding to the first screw holes 123 and the second screw holes 124 on both ends. The second limiting plate 122 has a third strip hole 127 and a fourth strip hole 128 corresponding to the first screw holes 123 and the second screw holes 124 on both ends. The first and second screws (not shown in the figure) pass through the first strip hole 125 and the second strip hole 126 respectively and are screwed to the first screw holes 123 and the second screw holes 124 to fasten the first limiting plate 121 to the upper end of the fixture base 12. The third and fourth screws (not shown in the figure) pass through the third strip hole 127 and the fourth strip hole 128 respectively and are screwed to the first screw holes 123 and the second screw holes 124 to fasten the second limiting plate 122 to the upper end of the fixture base 12.

[0031] The clamping drive module 32 and the fixture 1 are fixed on the shock-absorbing plate 5. The lower end of the shock-absorbing plate 5 is mounted on the base plate 7 in a floating manner through several spring seats 6. The lower end of the base plate 7 is provided with multiple rubber shock-absorbing seats 71. Each spring seat 6 includes an upper seat body 61 and a lower seat body 62, as well as multiple support springs 63 disposed between the upper seat body 61 and the lower seat body 62. The upper seat body 61 is fixedly connected to the lower end face of the shock-absorbing plate 5, and the lower seat body 62 is fixedly connected to the upper end face of the base plate 7. This ensures that the clamping drive module 32 and the fixture 1 are not affected by external vibrations or that the impact of external vibrations is reduced, thereby isolating or reducing the adverse effects of external vibrations on the test results.

[0032] The base plate 7 is also provided with a second housing 70, which covers the shock-absorbing plate 5, the spring seat 6 and a part of the fixture 1, thereby achieving a protective function.

[0033] The contouring block 31 is equipped with an FSR sensor 301 for detecting the clamping force. The FSR sensor 301 detects the pressure when the product to be tested 100 is clamped, so as to better control the force of the clamping drive module 32 driving the contouring block 31 to press down.

[0034] The clamping drive module 32 includes a support frame 321, a lifting frame 323 movably mounted on the support frame 321 via a guide rod assembly 322, a lifting drive component 324 for driving the lifting frame 323 to move up and down relative to the support frame 321, and a bidirectional floating component 325 mounted on the lower end of the lifting frame 323 and capable of horizontal elastic swinging and vertical elastic floating. The contouring block 31 is mounted on the lower end of the bidirectional floating component 325 and is located above the fixture 1. When the contouring block 31 presses against the upper end of the product 100 to be tested, even if there is a positional deviation, it can achieve horizontal elastic swinging through the bidirectional floating component 325, thereby adjusting its relative position to better press against the product 100 to meet the clamping conditions. At the same time, the contouring block 31 achieves vertical elastic floating through the bidirectional floating component 325, thereby driving the contouring block 31 to press against the product 100 to be tested in an elastic manner rather than a rigid manner, resulting in better clamping and preventing damage to the product 100 to be tested.

[0035] In this embodiment, the lifting drive component 324 is an electric cylinder.

[0036] The wires 300 of the FSR sensor 301 and bone conduction sensor 302 pass through the lifting frame 323 and then through the central channel 3222 of the guide rod 3221 in the guide rod assembly 322, extending to the lower end of the support frame 321 and electrically connected to the junction box 33 installed on the side of the support frame 321. The wires 300 pass through the central channel 3222 of the guide rod 3221 in the guide rod assembly 322, which has a high degree of concealment and is neat. Moreover, no additional junction box is required for wiring, saving costs.

[0037] The bidirectional floating assembly 325 includes a swing seat 3251, a swing shaft 3252 fixed to the upper end of the swing seat 3251 and passing through a strip-shaped swing hole 3231 provided in the lifting frame 323, a plurality of guide screws 3254 passing through the upper right and downward through the movable holes provided in the swing seat 3251 and spirally fixed to the upper end of the contouring block 31, a longitudinal spring 3255 sleeved on the outside of the guide screws 3254 and in contact with the lower end face of the swing seat 3251 and the upper end face of the contouring block 31 respectively, a pin 3256 provided on the upper end of the swing shaft 3252 and rotatably connected to the strip-shaped swing hole 3231, a first stop block 3253 and a second stop block 3257 provided on the upper end of the lifting frame 323 and distributed on both sides of the upper end of the swing shaft 3252, a first transverse spring 3258 installed between the first stop block 3253 and one side of the swing shaft 3252, and a second transverse spring 3259 installed between the second stop block 3257 and the other side of the swing shaft 3252. The upper end of the swing shaft 3252 can swing horizontally in the strip swing hole 3231. In the normal state, the first transverse spring 3258 and the second transverse spring 3259 provide elastic support to both sides of the swing shaft 3252, so that the swing shaft 3252 is in a centrally balanced state. If the conforming pressure block 31 has a positional deviation when it contacts the product to be tested 100 and needs to swing, the swing shaft 3252 will compress either the first transverse spring 3258 or the second transverse spring 3259 to achieve the swing.

[0038] The pressing drive module 32 is further provided with a first housing 320, which protects the pressing drive module 32.

[0039] In summary, in practical use, the product to be tested 100 is placed on the flexible sound guide tube 2 of the fixture 1, and the upper curved surface 21 of the upper end of the flexible sound guide tube 2 is fitted and sealed with the lower surface of the product to be tested 100; then, the compression drive module 32 drives the contoured pressure block 31 to press on the product to be tested 100 to cooperate with the flexible sound guide tube 2 to press the product to be tested 100, so that the sound guide channel 10 forms a sealed space; when the product to be tested 100 is powered on, the sound generated by the product to be tested 100 during operation is transmitted through the sound guide tube and the sound guide channel 10 to the first microphone 41 for reception, denoted as A. The sound is amplified by the sound amplifier 42 and received by the second microphone 43, designated as signal B; and the bone conduction sensor 302 on the contouring block 31 detects the vibration / sound generated by the product under test 100 during operation, designated as signal C. In this way, the sound signals generated by the product under test 100 during operation are used in three different ways, and these signals are transmitted to a computer or the like for analysis to achieve abnormal sound detection. Among them, the analysis of the three signals can more accurately determine whether the product under test 100 has defects that cause abnormal sounds, and determine whether the product under test 100 has any abnormalities. This invention employs a flexible sound guide tube 2 directly attached to the lower surface of the product under test, and then a contoured pressure block 31 presses it onto the product under test 100, causing the flexible sound guide tube 2 to undergo slight deformation to ensure a tight seal. This creates a sealed space in the sound channel 10, allowing the sound signal from the product under test 100 during operation to be directly transmitted to the sound collection assembly 4 through the flexible sound guide tube 2 and the sound channel 10. This avoids interference from external noise on the collected sound, improves the accuracy of the test, and significantly reduces the overall size of the device. In addition, the bone conduction sensor 302 on the contoured pressure block 31 detects the vibration / sound generated by the product under test 100 during operation, and is also unaffected by external noise.

[0040] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A multi-sensor integrated acoustic and vibration testing device, characterized in that: It includes: A fixture (1) is provided with a sound guide channel (10). The upper part of the fixture (1) is provided with a flexible sound guide tube (2) for fitting with the product to be tested (100). The upper end of the flexible sound guide tube (2) is provided with an upper curved surface (21) that can fit with the lower surface of the product to be tested (100), and the lower end of the flexible sound guide tube (2) is connected to the upper end of the sound guide channel (10). When the upper curved surface (21) of the flexible sound guide tube (2) is fitted with the lower surface of the product to be tested (100), the sound guide channel (10) forms a sealed space. The automatic clamping mechanism (3) includes a contouring block (31) and a clamping drive module (32) for driving the contouring block (31) to press against the product under test (100) in conjunction with the flexible sound guide tube (2) to clamp the product under test (100). The contouring block (31) is provided with a bone conduction sensor (302) for detecting the vibration / sound generated during the operation of the product under test (100). The sound collection component (4) includes a first microphone (41) disposed in the fixture (1) and exposed in the sound guide channel (10), a sound amplifier (42) disposed at the lower end of the sound guide channel (10), and a second microphone (43) disposed at the output end of the sound amplifier (42). The sound generated by the product to be tested (100) during operation is transmitted to the first microphone (41) through the flexible sound guide tube (2) and the sound guide channel (10) for reception by the first microphone (41). At the same time, the sound is amplified by the sound amplifier (42) and then received by the second microphone (43).

2. The multi-sensor integrated acoustic and vibration testing device according to claim 1, characterized in that: The fixture (1) includes a base (11) and a fixture seat (12) sealed and assembled on the base (11) by a sealing ring (13). The fixture seat (12) is provided with a sound guide channel (10) that runs through the upper and lower end faces. The first microphone (41) is disposed in the fixture seat (12). The sound amplifier (42) is mounted on the base (11) by a first soft rubber pad (420), and the front end of the sound amplifier (42) is embedded in the lower end of the sound guide channel (10).

3. The multi-sensor integrated acoustic and vibration testing device according to claim 1, characterized in that: The fixture (1) has a first mounting hole (101) on its side that passes through the sound guide channel (10); the first microphone (41) is inserted into the first soft rubber sleeve (410), and the first soft rubber sleeve (410) is inserted and fixed in the first mounting hole (101), so that the first microphone (41) and the first mounting hole (101) form a sealed assembly.

4. The multi-sensor integrated acoustic and vibration testing device according to claim 1, characterized in that: The output end (421) of the sound amplifier (42) has a cylindrical structure. The output end (421) is covered with a second soft rubber sleeve (430). The second microphone (43) is inserted into the second soft rubber sleeve (430) and forms a sealed assembly.

5. The multi-sensor integrated acoustic and vibration testing device according to claim 1, characterized in that: The fixture (1) has an upper end with a mounting groove (102) that connects to the sound guide channel (10). A dustproof mesh (14) is fixed at the bottom of the mounting groove (102) and covers the sound guide channel (10). The flexible sound guide tube (2) is embedded and fixed in the mounting groove (102), and the positioning ribs (22) around the flexible sound guide tube (2) are pressed into the positioning grooves (103) provided on the inner wall of the mounting groove (102).

6. The multi-sensor integrated acoustic and vibration testing device according to claim 5, characterized in that: The bottom of the mounting groove (102) is also secured with an annular pressure plate (15) by screws, which presses against the outer edge of the dustproof mesh (14).

7. The multi-sensor integrated acoustic and vibration testing device according to claim 2, characterized in that: The upper end of the fixture base (12) is provided with a first limiting plate (121) and a second limiting plate (122) that are relatively distributed and used to position the product to be tested (100). The relative positions of the first limiting plate (121) and the second limiting plate (122) can be adjusted relative to the upper end of the fixture base (12).

8. A multi-sensor integrated acoustic and vibration testing device according to any one of claims 1-7, characterized in that: The clamping drive module (32) and the fixture (1) are fixed on the shock-absorbing plate (5). The lower end of the shock-absorbing plate (5) is installed on the base plate (7) in a floating manner through several spring seats (6). The lower end of the base plate (7) is provided with multiple rubber shock-absorbing seats (71). The spring seat (6) includes an upper seat body (61) and a lower seat body (62) as well as multiple support springs (63) disposed between the upper seat body (61) and the lower seat body (62). The upper seat body (61) is fixedly connected to the lower end face of the shock-absorbing plate (5), and the lower seat body (62) is fixedly connected to the upper end face of the base plate (7).

9. A multi-sensor integrated acoustic and vibration testing device according to any one of claims 1-7, characterized in that: The conformal pressure block (31) is provided with an FSR sensor (301) for detecting the clamping force; the clamping drive module (32) includes a support frame (321), a lifting frame (323) movably mounted on the support frame (321) via a guide rod assembly (322), a lifting drive component (324) for driving the lifting frame (323) to rise and fall relative to the support frame (321), and a bidirectional mechanism installed at the lower end of the lifting frame (323) that can elastically swing horizontally and elastically float vertically. The floating assembly (325) has the contoured pressure block (31) installed at the lower end of the bidirectional floating assembly (325) and located above the fixture (1); the wires of the FSR sensor (301) and the bone conduction sensor (302) pass through the lifting frame (323) and then through the central channel (3222) of the guide rod (3221) in the guide rod assembly (322) to the lower end of the support frame (321) and are electrically connected to the wiring board (33) installed on the side of the support frame (321).

10. The multi-sensor integrated acoustic and vibration testing device according to claim 9, characterized in that: The bidirectional floating assembly (325) includes a swing seat (3251), a swing shaft (3252) fixed to the upper end of the swing seat (3251) and passing through a strip-shaped swing hole (3231) provided in the lifting frame (323), a plurality of guide screws (3254) passing through the movable holes provided in the swing seat (3251) from the upper right downward and then being spirally fixed to the upper end of the contouring block (31), and longitudinal springs sleeved on the outside of the guide screws (3254) and contacting the lower end face of the swing seat (3251) and the upper end face of the contouring block (31) respectively. (3255), a pin (3256) set on the upper end of the swing shaft (3252) and rotatably connected to the strip swing hole (3231), a first stop block (3253) and a second stop block (3257) set on the upper end of the lifting frame (323) and distributed on both sides of the upper end of the swing shaft (3252), a first transverse spring (3258) installed between the first stop block (3253) and one side of the swing shaft (3252), and a second transverse spring (3259) installed between the second stop block (3257) and the other side of the swing shaft (3252).

Images