Portable efficient sound insulation device capable of being used for abnormal sound detection

Abstract

The invention discloses a portable efficient sound insulation device capable of being used for abnormal sound detection, which comprises a box body, first sound insulation cotton is arranged on the bottom surface and the peripheral wall of an inner cavity of the box body to form a first sound insulation chamber, and a first damping rubber mat is arranged in the first sound insulation chamber; the abnormal sound detection device comprises a shockproof test seat which is arranged on the first damping rubber mat and located in the first sound insulation cavity, the shockproof test seat is provided with a containing groove, a sound guide cylinder made of a flexible material is arranged on one side of the containing groove, and one end of the sound guide cylinder is a curved surface capable of being attached to the surface of a product to be detected; the other end of the sound guide cylinder is provided with a sound collection member used for collecting sound. The box cover is arranged on the box body, second sound insulation cotton is arranged in the box cover, and a second sound insulation cavity is formed in the second sound insulation cotton; the microphone reception mechanism is arranged in the second sound insulation chamber; when the box cover is closed relative to the box body, the box cover and the box body are assembled in a sealed mode, the second sound insulation cavity is in butt joint with the first sound insulation cavity, and the microphone sound receiving mechanism is arranged above the abnormal sound detection device.

Description

Technical Field

[0001] This invention relates to the field of abnormal sound detection technology, and specifically to a portable, high-efficiency sound insulation device that can be used for abnormal sound detection. Background Technology

[0002] Currently, there is strong demand in the field of industrial noise control. One part is concentrated in high-noise industrial environments, such as substations and steam turbines in the power industry, and stamping equipment and air compressor base stations in the manufacturing industry; the other part is concentrated in precision abnormal sound detection scenarios, such as defect detection of motors and bearings, and quality control of consumer electronics.

[0003] 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.

[0004] Existing motor noise detection equipment typically uses microphones to directly capture and analyze sound, transmitting the sound directly through the air medium. The sound signal is then analyzed for differences in the spectrum. Sufficient control examples (high-quality motor samples and substandard motor samples) are collected beforehand outside the line, and relevant weight parameters are trained and assigned weights in the spectrum to highlight potential defects.

[0005] 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".

[0006] 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.

[0007] To address the above problems, the inventors propose the following technical solutions. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a portable and efficient sound insulation device that can be used for abnormal noise detection.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a portable high-efficiency sound insulation device for detecting abnormal noise includes: a housing, wherein the bottom surface and peripheral walls of the inner cavity are provided with first sound insulation cotton to form a first sound insulation chamber, and a first shock-absorbing rubber pad is provided in the first sound insulation chamber; an abnormal noise detection device, which includes a shock-absorbing test seat disposed on the first shock-absorbing rubber pad and located in the first sound insulation chamber for placing the product to be tested, the shock-absorbing test seat having a receiving groove for accommodating the product to be tested, and a flexible material being provided on one side of the receiving groove. The device includes a sound guide tube, one end of which is curved and can fit against the surface of the product to be tested, and the other end of which is equipped with a sound collector for collecting sound; a cover that can be opened or closed and is installed on the housing, and a second sound insulation cotton is provided inside the cover, forming a second sound insulation chamber; a microphone and radio mechanism is disposed in the second sound insulation chamber; when the cover is closed relative to the housing, they are sealed together, and the second sound insulation chamber is connected to the first sound insulation chamber, and the microphone and radio mechanism is positioned above the noise detection device.

[0010] Furthermore, in the above technical solution, the bottom of the box is provided with casters and a shock-absorbing rubber pad assembly located next to the casters. The shock-absorbing rubber pad assembly includes a positioning guide plate fixed to the bottom of the box, a first magnetic suction member fixed to the end face of the positioning guide plate, a second magnetic suction member magnetically fixed to the first magnetic suction member, a metal foot cone fixed to the lower end of the second magnetic suction member, and a carbon fiber rubber pad for placing on the floor and adapted to the metal foot cone. The metal foot cone can be detached relative to the positioning guide plate. The carbon fiber rubber pad is provided with a conical groove, and the lower end of the metal foot cone is provided with a conical part, which is embedded in the conical groove.

[0011] Furthermore, in the above technical solution, a magnet is provided at the upper end of the box body, and an electromagnet corresponding to the magnet is provided at the lower end of the box cover. When the box cover is closed relative to the box body, the electromagnet and the magnet are magnetically attracted and fixed, and the second sound insulation cotton and the first sound insulation cotton are pressed into contact; the box cover and the box body are also sealed in contact by a sealing strip.

[0012] Furthermore, in the above technical solution, a retractable pull rod is provided at the rear end of the box, and an interface panel with multiple interfaces is also provided at the rear end of the box; movable handles are provided on both sides of the box.

[0013] Furthermore, in the above technical solution, the microphone radio mechanism includes a base, a track mounted on the base and distributed in the front-back direction, a slider mounted on the track in an adjustable relative position, a MIC anti-vibration bracket mounted on the slider, and a first microphone mounted on the MIC anti-vibration bracket. Both ends of the base are provided with shock-absorbing rubber pads and fixing plates. The base is installed inside the box cover by the fixing plates, and the second sound insulation cotton also wraps the fixing plates.

[0014] Furthermore, in the above technical solution, the outer surface of the slider is provided with a screw hole facing inward, and the locking screw passes through the screw hole and presses against the track to lock the slider on the track.

[0015] Furthermore, in the above technical solution, the shockproof test base is fixed on a test platform, and a through hole corresponding to the receiving groove is opened on the test platform; the sound guide tube is fixed at the through hole; the test platform is suspended above a test base, a socket assembly is provided on the test platform, a connector assembly is provided on the test base, and the socket assembly is provided with conductive terminals; the connector assembly is provided with elastic probes; the socket assembly and the connector assembly are connected through the elastic contact between the conductive terminals and the elastic probes.

[0016] Furthermore, in the above technical solution, the test base is provided with a support for suspending and supporting the test platform, and a positioning pin is provided on the test base; a positioning hole is opened on the test platform corresponding to the position of the positioning pin, and the test platform is restricted on the support by the pin hole cooperation between the positioning pin and the positioning hole, and a buffer sleeve is provided between the positioning pin and the positioning hole.

[0017] Furthermore, in the above technical solution, the sound guide tube is made of silicone material, and a ring-shaped foam is fixed to one end of the sound guide tube that is attached to the product to be tested; the test base is provided with a camera unit for photographing the product to be tested.

[0018] Furthermore, in the above technical solution, the sound collecting component includes: a sound amplifier located at one end of the sound guide tube, a second microphone disposed at the output end of the sound amplifier, a positioning block for horizontally positioning the sound amplifier, and an elastic top plate for vertically positioning the sound amplifier. The positioning block and the elastic top plate restrict the sound amplifier to the end of the sound guide tube. The sound generated by the product under test during operation is transmitted to the sound amplifier through the sound guide tube, amplified by the sound amplifier, and then received by the second microphone.

[0019] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: Since the first sound insulation cotton and the second sound insulation cotton are respectively arranged inside the box body and the box cover, and are sealed together after the box cover is closed relative to the box body, and the first and second sound insulation cotton are connected, and the second sound insulation chamber is connected to the first sound insulation chamber, a sound insulation space with excellent sound insulation effect is formed, which can effectively shield external noise, providing a good testing space for the abnormal sound detection device to perform abnormal sound detection on the product under test; furthermore, the abnormal sound detection device is set in the first sound insulation... The first shock-absorbing pad inside the chamber further reduces and absorbs vibration, minimizing or eliminating the impact of vibration on the sound detection effect. The sound detection device uses a flexible material sound guide tube that is directly attached to the surface of the product to be tested. The sound signal of the motor (i.e., the product to be tested) during operation is directly transmitted to the sound collector through the sound guide tube, avoiding interference from noise in the external environment and improving the accuracy of the detection. At the same time, a microphone and radio mechanism is used to collect the sound of the motor (i.e., the product to be tested) working environment, thereby realizing a dual sound collection detection method, which has a better detection effect. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the invention from another angle; Figure 3 This is a perspective view of the invention after the box lid is opened; Figure 4 This is a perspective view of the microphone-receiver mechanism in this invention; Figure 5 This is a partial cross-sectional view of the present invention; Figure 6 This is a perspective view of the abnormal sound detection device in this invention; Figure 7 This is a perspective view of the abnormal sound detection device in this invention from another angle; Figure 8 This is an exploded perspective view of the abnormal sound detection device in this invention; Figure 9 This is a perspective view of the anti-vibration test base, the product to be tested, the sound tube, and the sound collecting component in this invention. Figure 10 This is a cross-sectional view of the abnormal sound detection device 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 1-10 As shown, a portable, high-efficiency soundproofing device for detecting abnormal noise is provided, comprising: a housing A, an abnormal noise detection device B, a housing cover C, and a microphone and radio mechanism D.

[0023] The inner bottom surface and peripheral walls of the housing A are provided with first sound insulation cotton A1 to form a first sound insulation chamber A0. A first shock-absorbing pad A2 is provided inside the first sound insulation chamber A0. The abnormal noise detection device B includes a shock-absorbing test base 3 disposed on the first shock-absorbing pad A2 and located in the first sound insulation chamber A0 for placing the product 9 to be tested. The shock-absorbing test base 3 has a receiving groove 30 for accommodating the product 9 to be tested. A sound guide tube 5 made of flexible material is provided on one side of the receiving groove 30. One end of the sound guide tube 5 is designed to be compatible with the product 9 to be tested. The surface of the 9-sided curved surface is fitted with a sound collector 4 for collecting sound at the other end of the sound guide tube 5; the cover C is installed on the box body A in a way that can be opened or closed, and a second sound insulation cotton C1 is provided inside the cover C, and a second sound insulation chamber C0 is formed in the second sound insulation cotton C1; a microphone and radio mechanism D is disposed in the second sound insulation chamber C0; when the cover C is closed relative to the box body A, they are sealed together, and the second sound insulation chamber C0 is connected to the first sound insulation chamber A0, and the microphone and radio mechanism D is placed above the abnormal sound detection device B. In other words, since the first sound insulation cotton A1 and the second sound insulation cotton C1 are respectively installed inside the box body A and the box cover C, and after the box cover C is closed relative to the box body A, they are sealed together, and the first sound insulation cotton A1 and the second sound insulation cotton C1 are connected, and the second sound insulation chamber C0 is connected to the first sound insulation chamber A0, a sound insulation space with excellent sound insulation effect is formed. It can effectively shield external noise and provide a good testing space for the abnormal noise detection device B to perform abnormal noise detection on the product 9 to be tested. Furthermore, the abnormal noise detection device B is set on the first shock-absorbing rubber pad A2 inside the first sound insulation chamber A0, which can further achieve the effect of shock absorption and vibration damping, reducing or eliminating the impact of vibration on the abnormal noise detection effect. In this embodiment, the product 9 to be tested is a motor. The abnormal sound detection device B uses a flexible material-made sound guide tube 5 that is directly attached to the surface of the product 9 to be tested. The sound signal of the motor (i.e., the product 9 to be tested) during operation is directly transmitted to the sound collector 4 through the sound guide tube 5, avoiding the interference of noise in the external environment on the collected sound and improving the accuracy of the detection. At the same time, a microphone-radio mechanism D is used to collect the sound of the working environment of the motor (i.e., the product 9 to be tested), thereby realizing a dual sound collection detection method, which has a better detection effect.

[0024] The noise detection device B has a significantly reduced overall size, and the sound guide tube and the product to be tested are directly sealed, which facilitates the isolation of external noise pollution.

[0025] In this embodiment, both the box body A and the box cover C are made of aluminum alloy.

[0026] For ease of movement, the following design was also implemented.

[0027] The bottom of the housing A is equipped with casters A3, which can be used to move the housing to any position to meet different usage requirements and the needs of testers to quickly switch experimental scenarios.

[0028] The rear end of the housing A is provided with a retractable pull rod A7, which makes the present invention a pull-rod box structure, which facilitates the movement of the entire device and meets the needs of testers to quickly switch experimental scenarios.

[0029] The box A has movable handles A9 on both sides, which are used by the test personnel to move the invention.

[0030] A shock-absorbing rubber pad assembly A4 is provided at the bottom of the housing A. This assembly is located beside the caster A3. The shock-absorbing rubber pad assembly A4 includes a positioning guide plate A41 fixed to the bottom of the housing A, a first magnetic member A42 fixed to the end face of the positioning guide plate A41, a second magnetic member A43 magnetically fixed to the first magnetic member A42, a metal foot cone A44 fixed to the lower end of the second magnetic member A43, and a carbon fiber rubber pad A45 for placement on the floor and adapted to the metal foot cone A44. The metal foot cone A44 can be detached from the positioning guide plate A41 so that after the housing A is moved to the predetermined position, the metal foot cone A44 can be fixedly installed on the lower end of the positioning guide plate A41 by the cooperation of the second magnetic member A43 and the first magnetic member A42. The carbon fiber pad A45 is provided with a conical groove A01, and the lower end of the metal foot cone A44 is provided with a conical part A02. The conical part A02 is embedded in the conical groove A01, which can effectively reduce the influence of the external environment of the sound insulation device on the internal testing environment.

[0031] The positioning guide plate A41 has a first positioning post A03 formed on its upper end. The first positioning post A03 is inserted into the first positioning groove A04 at the bottom of the box A to achieve positioning. The positioning guide plate A41 is also locked to the bottom of the box A by screws. The lower end face of the positioning guide plate A41 is also provided with an annular groove A05. The first magnetic suction member A42 is annular and is embedded and fixed in the annular groove A05, and then glued. The lower end face of the positioning guide plate A41 is also provided with a second positioning groove A06, which is located at the center of the annular groove A05. The upper end of the second magnetic suction member A43 is also provided with a positioning protrusion A07, which is embedded in the second positioning groove A06 to form horizontal positioning. The second magnetic suction member A43 is then magnetically fixed to the first magnetic suction member A42 to form vertical positioning. The second magnetic member A43 has a countersunk hole A08 extending downward from the positioning protrusion A07, and the upper end of the metal foot cone A44 is provided with a threaded groove A09. A screw (not shown in the figure) passes through the countersunk hole A08 and is screwed into the threaded groove A09 to fix the metal foot cone A44 to the lower end of the second magnetic member A43, thereby forming a stable assembly.

[0032] A magnet A5 is provided at the upper end of the enclosure A, and an electromagnet C2 corresponding to the magnet A5 is provided at the lower end of the enclosure cover C. When the enclosure cover C is closed relative to the enclosure A, the electromagnet C2 is magnetically attracted and fixed to the magnet A5, and the second sound insulation cotton C1 is pressed and contacted with the first sound insulation cotton A1. The enclosure cover C and the enclosure A are also sealed and contacted by a sealing strip A6, thereby achieving an isolation degree of greater than 40 dBA.

[0033] The rear end of the enclosure A is also equipped with an interface panel A8, which has multiple interfaces A81. The interface panel A8 is electrically connected to the noise detection device B and the microphone receiver D. The first microphone D5 is connected to the interface panel A8 via a wire.

[0034] The microphone-receiver mechanism D includes a base D1, a track D2 mounted on the base D1 and distributed along the front-to-back direction, a slider D3 mounted on the track D2 in an adjustable relative position, a microphone anti-vibration bracket D4 mounted on the slider D3, and a first microphone D5 mounted on the microphone anti-vibration bracket D4. Both ends of the base D1 are provided with shock-absorbing rubber pads D6 and fixing plates D7. The base D1 is mounted inside the enclosure cover C via the fixing plates D7, and the second sound insulation cotton C1 also wraps around the fixing plates D7. The shock-absorbing rubber pads D6 can eliminate the influence of enclosure vibration on the sound reception of the first microphone D5, further improving the effect and quality of abnormal sound detection.

[0035] The first microphone D5 is mounted on the slider D3 via the MIC anti-vibration bracket D4, which further eliminates the impact of cabinet vibration on the sound pickup of the first microphone D5, improving the effect and quality of abnormal noise detection. During use, the relative position of the first microphone D5 can be adjusted by sliding the slider D3 relative to the track D2, so that the first microphone D5 can be adjusted to the optimal position for better sound pickup.

[0036] The slider D3 has a screw hole D31 on its outer surface facing inward. The locking screw D8 passes through the screw hole D31 and presses against the track D2 to lock the slider D3 onto the track D2. Its assembly structure is simple and easy to operate.

[0037] The specific structure of the abnormal noise detection device A is shown in [the following text is missing]. Figures 6 to 10 As shown, it includes: a test base 1, a test platform 2, a shockproof test base 3, a sound collector 4, a sound tube 5, a socket assembly 6, and a connector assembly 7.

[0038] The test base 1 is used to support all components, and a support part 11 for mounting the test platform 2 is fixed on it. The support part 11 can be two parallel support bars, and the left and right sides of the test platform 2 can be placed above the two support parts 11, so that the test platform 2 is suspended above the test base 1.

[0039] To facilitate the positioning of the test platform 2, at least two vertically positioned corner brackets 13 are fixed on the test base 1. In this embodiment, the two corner brackets 13 are respectively located on the same side of the two support parts 11, and the test platform 2 can be quickly positioned in the horizontal direction using the corner brackets 13. After positioning is completed, the test platform 2 is positioned by positioning pins 12 and positioning holes 22. Specifically, the test base 1 is provided with positioning pins 12; the test platform 2 is provided with positioning holes 22 corresponding to the positions of the positioning pins 12. The test platform 2 is restricted to the support part 11 by the pin-hole cooperation between the positioning pins 12 and the positioning holes 22, and a buffer sleeve 220 is provided between the positioning pins 12 and the positioning holes 22. The buffer sleeve 220 provides a certain buffer between the positioning pins 12 and the positioning holes 22, preventing the vibration generated by the product 9 under test from being rigidly transmitted to the test base 1 when it is working.

[0040] The shockproof test stand 3 and the sound guide tube 5 are fixedly mounted on the test platform 2. The shockproof test stand 3 is generally a frame structure with a receiving groove 30 for accommodating the product 9 to be tested. The cavity of the receiving groove 30 is larger than the product 9 to be tested, and the product 9 to be tested is positioned through the receiving groove 30. The shockproof test stand 3 is provided with a positioning groove 31, which corresponds to the hub 92 of the motor output shaft 91. When the product 9 to be tested is placed in the receiving groove 30, the hubs 92 on both sides are exactly located in the positioning groove 31, thus suspending the motor output shaft 91. This ensures that the product 9 to be tested can operate smoothly during testing.

[0041] Similarly, in order to avoid rigid transmission of vibrations generated during motor operation, a rubber pad 310 is provided in the positioning groove 31.

[0042] The sound guide tube 5 is a cylindrical component made of flexible material. One end of the sound guide tube 5 has a curved surface that can fit against the surface of the product 9 to be tested, and the other end of the sound guide tube 5 is provided with a sound collector 4 for collecting sound. Generally, the sound guide tube 5 is made of silicone material. Since the main body of the motor is generally cylindrical, the curved surface of the sound guide tube 5 that fits against the surface of the product 9 to be tested is usually an intersecting curved surface. To avoid possible gaps during the fit, a ring-shaped foam 51 is fixed to the end of the sound guide tube 5 that fits against the product 9 to achieve a tight fit. The compressibility of the foam material adapts to the surface of the product 9 to be tested.

[0043] The sound guide tube 5 is fixed on the test platform 2. Specifically, the test platform 2 has a through hole 21 corresponding to the receiving groove 30. The sound guide tube 5 can be fixed at the through hole 21 by a snap-fit ​​structure or by adhesive bonding.

[0044] The sound collecting component 4 includes a sound amplifier 41 located at one end of the sound guide tube 5 and a second microphone 42 disposed at the output end of the sound amplifier 41. The sound amplifier 41 is similar to a stethoscope in the medical industry; it can be a passive amplifier, such as a diaphragm amplifier, or an active amplifier, such as a signal amplifier amplified by a piezoelectric sensor before being output to the second microphone 42. The sound amplifier 41 has a horizontally arranged sound guide tube, and the second microphone 42 is inserted and fixed in this sound guide tube. The second microphone 42 transmits the signal to the detection unit via a wire.

[0045] Combination Figure 4 , Figure 5 As shown, the installation method of the sound collector 4 is as follows: The sound collector 4 also includes a positioning block 43 for horizontal positioning of the sound amplifier 41, an elastic top plate 44 for vertical positioning of the sound amplifier 41, and a spring 45 that applies an upward elastic force to the elastic top plate 44. The positioning block 43 is fixed to the test base 1 with screws. Two positioning blocks 43 are provided, which clamp the sound amplifier 41 horizontally by means of clamping from both sides. The test base 1 is provided with a spring groove 100. One end of the spring 45 is placed in the spring groove 100, and the upper end of the spring 45 abuts against the bottom surface of the elastic top plate 44. The sound amplifier 41 is placed above the elastic top plate 44. The elastic top plate 44 provides elastic support to the sound amplifier 41 through the elastic force generated by the spring 45, restricting the sound amplifier 41 to the end of the sound guide tube 5.

[0046] In the process of testing the product 9, the present invention requires the connection of power cord and signal line. In order to facilitate wiring, the present invention provides a socket assembly 6 on the test platform 2 and a connector assembly 7 on the test base 1.

[0047] The test base 1 is a relatively fixed component. In the detection unit of this invention, the power cord and signal line are connected to the connector assembly 7 on the test base 1 through a wiring plug. The product to be tested 9, the sound collector 4 and other components are connected to the socket assembly 6. Then, the socket assembly 6 and the connector assembly 7 are electrically connected.

[0048] For the electrical connection between the socket assembly 6 and the connector assembly 7, the present invention adopts the following scheme: The socket assembly 6 includes a plurality of sockets 60 and conductive terminals 61 electrically connected to the sockets 60. The connector assembly 7 includes a structural fixing base 70 and elastic probes 71 corresponding to the conductive terminals 61, disposed on the connector fixing base 70. A notch 10 is provided on the test base 1, and the connector fixing base 70 is fixed at the notch 10 position by screws. When the test platform 2 is installed on the test base 1, the conductive terminals 61 are in contact with the elastic probes 71, and the socket assembly 6 and the connector assembly 7 are connected through the elastic contact between the conductive terminals 61 and the elastic probes 71.

[0049] This invention includes two sets of socket assemblies 6 and connector assemblies 7, allowing the user to select one set as needed. Furthermore, for ease of wiring connections, the test platform 2 can be directly constructed using a PCB circuit board.

[0050] In addition, the present invention also includes a camera unit 8 fixed on the test base 1 for photographing the product 9 to be tested. During the test, the product 9 to be tested is photographed by the camera unit 8 to capture its operating status. Abnormalities, such as abnormal motor vibrations, can be detected in a timely manner through the captured images.

[0051] In summary, since the first sound insulation cotton A1 and the second sound insulation cotton C1 are respectively installed inside the box body A and the box cover C, and the box cover C is closed relative to the box body A, they are sealed together, and the first sound insulation cotton A1 and the second sound insulation cotton C1 are connected, and the second sound insulation chamber C0 is connected to the first sound insulation chamber A0, a sound insulation space with excellent sound insulation effect is formed. It can effectively shield external noise and provide a good testing space for the abnormal noise detection device B to perform abnormal noise detection on the product 9 to be tested. Furthermore, the abnormal noise detection device B is set on the first shock-absorbing rubber pad A2 inside the first sound insulation chamber A0, which can further achieve the effect of shock absorption and vibration damping, reducing or eliminating the impact of vibration on the abnormal noise detection effect. In this embodiment, the product 9 to be tested is a motor. The abnormal sound detection device B uses a flexible material-made sound guide tube 5 that is directly attached to the surface of the product 9 to be tested. The sound signal of the motor (i.e., the product 9 to be tested) during operation is directly transmitted to the sound collector 4 through the sound guide tube 5, avoiding the interference of noise in the external environment on the collected sound and improving the accuracy of the detection. At the same time, a microphone-radio mechanism D is used to collect the sound of the working environment of the motor (i.e., the product 9 to be tested), thereby realizing a dual sound collection detection method, which has a better detection effect.

[0052] 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 portable, high-efficiency sound insulation device for detecting abnormal noise, characterized in that: include: The enclosure (A) has a first sound insulation cotton (A1) on its inner bottom surface and peripheral walls to form a first sound insulation chamber (A0), and a first shock-absorbing rubber pad (A2) is provided inside the first sound insulation chamber (A0). The noise detection device (B) includes a shockproof test seat (3) disposed on a first shock-absorbing rubber pad (A2) and located in a first soundproof chamber (A0) for placing a product to be tested (9). The shockproof test seat (3) has a receiving groove (30) for accommodating the product to be tested (9). A sound guide tube (5) made of flexible material is provided on one side of the receiving groove (30). One end of the sound guide tube (5) is a curved surface that can fit with the surface of the product to be tested (9). The other end of the sound guide tube (5) is provided with a sound collecting element (4) for collecting sound. A cover (C) is installed on the enclosure (A) in a way that can be opened or closed, and a second sound insulation cotton (C1) is provided inside the cover (C), and a second sound insulation chamber (C0) is formed in the second sound insulation cotton (C1). A microphone-receiving mechanism (D) is located within the second soundproof chamber (C0); When the lid (C) is closed relative to the body (A), they are sealed together, and the second soundproof chamber (C0) is connected to the first soundproof chamber (A0). The microphone and radio mechanism (D) is placed above the noise detection device (B).

2. The portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 1, characterized in that: The bottom of the housing (A) is provided with casters (A3) and a shock-absorbing rubber pad assembly (A4) located next to the casters (A3). The shock-absorbing rubber pad assembly (A4) includes a positioning guide plate (A41) fixed to the bottom of the housing (A), a first magnetic suction member (A42) fixed to the end face of the positioning guide plate (A41), a second magnetic suction member (A43) magnetically fixed to the first magnetic suction member (A42), a metal foot cone (A44) fixed to the lower end of the second magnetic suction member (A43), and a carbon fiber rubber pad (A45) for placing on the floor and adapted to the metal foot cone (A44). The metal foot cone (A44) can be detached relative to the positioning guide plate (A41). The carbon fiber rubber pad (A45) is provided with a conical groove (A01), and the lower end of the metal foot cone (A44) is provided with a conical part (A02), which is embedded in the conical groove (A01).

3. A portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 2, characterized in that: A magnet (A5) is provided at the upper end of the box body (A), and an electromagnet (C2) corresponding to the magnet (A5) is provided at the lower end of the box cover (C). When the box cover (C) is closed relative to the box body (A), the electromagnet (C2) is magnetically attracted and fixed to the magnet (A5), and the second sound insulation cotton (C1) is pressed and contacted with the first sound insulation cotton (A1). The box cover (C) and the box body (A) are also sealed and contacted by a sealing strip (A6).

4. A portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 1, characterized in that: The rear end of the enclosure (A) is provided with a retractable pull rod (A7), and the rear end of the enclosure (A) is also provided with an interface panel (A8) having multiple interfaces (A81); movable handles (A9) are provided on both sides of the enclosure (A).

5. A portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 1, characterized in that: The microphone and radio mechanism (D) includes a base (D1), a track (D2) mounted on the base (D1) and distributed in the front-back direction, a slider (D3) mounted on the track (D2) in an adjustable relative position, a MIC shockproof bracket (D4) mounted on the slider (D3), and a first microphone (D5) mounted on the MIC shockproof bracket (D4). Both ends of the base (D1) are provided with shock-absorbing rubber pads (D6) and fixing plates (D7). The base (D1) is installed inside the box cover (C) through the fixing plate (D7). The second sound insulation cotton (C1) also wraps the fixing plate (D7).

6. A portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 5, characterized in that: The slider (D3) has a screw hole (D31) on its outer surface facing inward. The locking screw (D8) spirals through the screw hole (D31) and presses against the track (D2) to lock the slider (D3) onto the track (D2).

7. A portable, high-efficiency sound insulation device for detecting abnormal noise according to any one of claims 1-6, characterized in that: The shockproof test base (3) is fixed on a test platform (2), and a through hole (21) corresponding to the receiving groove (30) is provided on the test platform (2); the sound guide tube (5) is fixed at the through hole (21); the test platform (2) is suspended above a test base (1), a socket assembly (6) is provided on the test platform (2), a connector assembly (7) is provided on the test base (1), the socket assembly (6) is provided with a conductive terminal (61); the connector assembly (7) is provided with an elastic probe (71); the socket assembly (6) and the connector assembly (7) are connected through the elastic contact between the conductive terminal (61) and the elastic probe (71).

8. A portable, high-efficiency sound insulation device for detecting abnormal noise as described in claim 7, characterized in that: The test base (1) is provided with a support part (11) for suspending and supporting the test platform (2), and a positioning pin (12) is provided on the test base (1); a positioning hole (22) is provided on the test platform (2) corresponding to the position of the positioning pin (12), and the test platform (2) is restricted on the support part (11) by the pin hole cooperation between the positioning pin (12) and the positioning hole (22), and a buffer sleeve (220) is provided between the positioning pin (12) and the positioning hole (22).

9. A portable, high-efficiency sound insulation device for detecting abnormal noise according to any one of claims 1-6, characterized in that: The sound guide tube (5) is made of silicone material, and a ring-shaped foam (51) is fixed at one end of the sound guide tube (5) that is attached to the product to be tested (9); the test base (1) is provided with a camera unit (8) for taking pictures of the product to be tested (9).

10. A portable, high-efficiency sound insulation device for detecting abnormal noise according to any one of claims 1-6, characterized in that: The sound collecting component (4) includes: a sound amplifier (41) located at one end of the sound guide tube (5), a second microphone (42) disposed at the output end of the sound amplifier (41), a positioning block (43) for horizontal positioning of the sound amplifier (41), and an elastic top plate (44) for vertical positioning of the sound amplifier (41). The sound amplifier (41) is restricted to the end of the sound guide tube (5) by the positioning block (43) and the elastic top plate (44). The sound generated by the product to be tested (9) during operation is transmitted to the sound amplifier (41) through the sound guide tube (5), and the sound is amplified by the sound amplifier (41) and received by the second microphone (42).

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