WO2022048189A1 - Système d'essai de mise en sourdine - Google Patents

Système d'essai de mise en sourdine Download PDF

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Publication number
WO2022048189A1
WO2022048189A1 PCT/CN2021/094752 CN2021094752W WO2022048189A1 WO 2022048189 A1 WO2022048189 A1 WO 2022048189A1 CN 2021094752 W CN2021094752 W CN 2021094752W WO 2022048189 A1 WO2022048189 A1 WO 2022048189A1
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WO
WIPO (PCT)
Prior art keywords
sound insulation
box
insulation box
door
sound
Prior art date
Application number
PCT/CN2021/094752
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English (en)
Chinese (zh)
Inventor
周良宏
Original Assignee
苏州拓朴声学科技有限公司
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Application filed by 苏州拓朴声学科技有限公司 filed Critical 苏州拓朴声学科技有限公司
Publication of WO2022048189A1 publication Critical patent/WO2022048189A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Definitions

  • the invention relates to the field of mute testing, in particular to a mute testing system.
  • the mute test box is also called sound insulation box and sound shielding box. It is a kind of equipment used to meet the low noise environment requirements of audio frequency testing.
  • the mute test box is an isolation cavity made of sound absorption, damping, sound insulation and vibration reduction materials. , to provide a low-noise detection environment far lower than ambient noise for product noise detection, and the requirements for acoustic performance indicators are high.
  • the traditional silent test box has the following shortcomings:
  • the noise floor value is relatively high, and it is difficult to be lower than 20 decibels; it is difficult to meet the requirements of a low-noise test environment;
  • the door is basically opened manually. Because the sound insulation door is relatively heavy and needs to be tightly sealed, for the high-frequency inspection of the production line, this labor-saving method is easy to cause operator fatigue. inconvenient to use;
  • the low noise background is extremely sensitive to vibration, and the imperfect matching of the vibration reduction system greatly affects the noise floor value inside the box.
  • test equipment Since the test equipment is installed in the silent test box, the test equipment needs to be powered on or operated with ventilation, so it is necessary to open through holes for threading and pipe penetration in the silent test box, and the sound will spread out from the through holes;
  • the technical problem to be solved by the present invention is to provide a mute test system, which can provide a mute test box and a perfect test system with an ultra-low background noise detection environment.
  • the present invention provides a silent test system, which is characterized in that it includes a silent test box, a noise measurement device, a feeding device and a control system;
  • the mute test box includes an inner sound insulation box, an outer sound insulation box and a vibration damping device, and both the inner sound insulation box and the outer sound insulation box are provided with sound insulation doors and anti-leakage sound insulation.
  • a junction box and an inspection door an automatic lifting device is arranged on the inner side of the sound insulation door of the inner sound insulation box, a pressing device is arranged on the outer side of the sound insulation door of the outer sound insulation box, and the inner sound insulation box is provided with an automatic lifting device.
  • the sound box body is also provided with a sound absorption device with a special structure;
  • the noise measuring device is used to detect the audio data of the test product in the silent test box
  • the feeding device can enter and exit the silent test box for picking and placing test products
  • the control system is electrically connected with the silent test box, the noise measuring device and the feeding device, and is used for controlling the work of the whole system.
  • the vibration damping device further includes a plurality of medium and high frequency vibration dampers arranged between the inner sound insulation box and the outer sound insulation box, and a plurality of medium and high frequency vibration dampers arranged between the outer sound insulation box and the outer sound insulation box.
  • the lower load-bearing bracket and a plurality of low frequency shock absorbers a plurality of the medium and high frequency shock absorbers are distributed in a rectangular array between the inner sound insulation box and the outer sound insulation box, and a plurality of the low frequency shock absorbers are arranged
  • limit blocks are arranged on the load-bearing bracket, the limit blocks are protruded upward and arranged on the edge of the load-bearing bracket, and the limit blocks limit the position of the outer sound insulation box.
  • the anti-leakage sound-insulating box is inserted through the side walls of the inner-layer sound-insulating box body and the outer-layer sound-insulating box body, and is used to penetrate into the mute test box.
  • the required pipelines include the inner sound insulation box, the fixing frame outside the outer sound insulation box, and the wire-passing combination module embedded in the inner sound insulation box and the outer sound insulation box.
  • the outer side of the wire combination module is provided with a protrusion protruding from the inner sound insulation box and the outer sound insulation box, the fixing frame is sleeved on the protrusion, and the wire combination module includes at least two layers
  • the wire-passing sub-modules are connected by bolt locking, and a wire-passing hole is opened on the center line of the adjacent two-layer wire-passing sub-modules after the molds are closed. Matching with the required pipeline clearance, maintenance is convenient.
  • the lifting device further includes a first rotating support assembly disposed on the sound insulation door of the inner sound insulation box and a second rotating support assembly disposed on the inner sound insulation box , the first rotating support assembly includes a first support base and a first rotating head, the second rotating support assembly includes a second support base and a second rotating head, and the space between the first rotating head and the second rotating head
  • a telescopic cylinder is provided, and the telescopic cylinder drives the sound insulation door to open or close. When the sound insulation door is in a closed state, the telescopic cylinder drives the sound insulation door to continue to apply pressure to the direction of the inner sound insulation box, and the sound insulation door is closed. Press down on the inner sound insulation box.
  • the pressing device further includes a fixed pressing block arranged on the side of the sound insulation door of the outer sound insulation box and a pressing component arranged on the outer sound insulation box.
  • the tightening assembly includes a pressing cylinder, a door tongue pressing block and a door tongue fixing support, the door tongue fixing support is arranged on the outer sound insulation box, and the door tongue pressing block is hinged on the door tongue and fixed by a pivot.
  • the door tongue pressing block on one side of the pivot is pressed against the fixed pressing block, and the door tongue pressing block on the other side of the pivot is connected with the pressing cylinder, and the pressing cylinder drives the door tongue pressing.
  • the block moves toward or away from the fixed pressure block to realize the opening and closing action of the door tongue pressure block.
  • the pressing cylinder drives the door tongue pressure block to continue to apply pressure to the fixed pressure block. pressure, and press the door tongue pressure block to the fixed pressure block.
  • the sound absorbing device further includes a metal plate arranged in the inner sound insulation box, the metal plate is arranged on the inner walls of the six sides of the inner sound insulation box, any The metal plates on the two adjacent surfaces are spliced together, the metal plates on the six surfaces are spliced to form a metal plate cavity, the metal plates are provided with a number of through holes penetrating the metal plates, and the metal plates are sound-insulated from the inner layer.
  • a filling layer of sound absorbing material is arranged between the inner walls of the box body.
  • the noise measurement device further includes a MIC sound sensor and a sound level meter, the MIC sound sensor is arranged in a silent test box, the sound level meter is arranged in the control system, and the noise measurement The device can identify various weighted sound pressure levels, sound spectrums, and sound pressure amplitudes of the test product.
  • the feeding device is disposed in the silent test box, the feeding device includes a fixed base, a sliding device is provided on the fixed base, and the sliding device includes a fixed base disposed on the fixed base.
  • the slide rail, the pneumatic slider matched with the slide rail, and the sliding platform arranged on the pneumatic slider, the sliding platform is provided with a secondary push-out device, and the secondary push-out device includes a push source and an experimental
  • a test bench is provided with a product limiting fixture on the experimental test bench.
  • control system further includes an industrial control box and an industrial control display screen
  • the industrial control box includes a computer host, a capture card, a sound level meter, an electrical control switch, a solenoid valve, a cooling fan, and a control button.
  • the control box integrates the control of the cylinder action of the entire test system, the processing of the cylinder induction signal; the acquisition, output, data operation, data analysis, identification and judgment, and storage of the acoustic measurement signal.
  • a monitoring camera and a lighting fixture are further provided in the silent test box.
  • the present invention adopts the sound insulation boxes arranged inside and outside to form the main sound insulation structure of the mute test box together, and the structure can effectively control the air sound transmission;
  • the vibration noise of different frequencies is reduced by the vibration damping device, the vibration noise from the solid body in the silent test box is reduced, and the sound environment quality in the silent test box is improved;
  • the threading and pipe threading in the silent test box can be realized, and the acoustic airtightness of threading and piping can be satisfied at the same time, and it has good sound insulation performance;
  • the sound insulation door is pressed against the inner sound insulation box and the outer sound insulation box by the lifting device and the pressing device respectively, so as to ensure the gap between the sound insulation door and the inner sound insulation box and the outer sound insulation box. It is in the ultimate compression state to ensure that there is no gap between the sound insulation door and the mute test box, and the sound insulation effect is improved;
  • the sound insulation effect is comprehensively improved from the control of noise generation, noise transmission path, and noise transmission path, providing An ultra-low noise detection environment is developed.
  • the feeding device Through the feeding device, the in-and-out motion of the experimental test bench in the silent test box is realized, the automatic expansion and contraction function of the test test bench is realized, and it is convenient to take and place the test product from the silent test box.
  • the mute test system of the present invention is further provided with a noise measuring device in the mute test box, and a control system electrically connected with all devices in the mute test box is arranged outside the mute test box, so as to realize the operation and control of the whole mute test system.
  • Fig. 1 is the overall side structure schematic diagram of the mute test system of the present invention
  • Fig. 2 is the overall top view structure schematic diagram of the mute test box of the present invention
  • Fig. 3 is the structural representation of the vibration damping device of the present invention.
  • Fig. 4 is the structural representation of the leak-proof sound-passing junction box of the present invention.
  • Fig. 5 is the structural representation of the lifting device of the present invention.
  • Fig. 6 is the structural representation of the pressing device of the present invention.
  • Fig. 7 is the structural representation of the sound absorption device of the present invention.
  • FIG. 8 is a schematic structural diagram of the feeding device of the present invention.
  • Pressing device 801, Fixed pressing block; 802, Pressing cylinder; Tongue pressing block; 804, door tongue fixing support; 805, handle; 9, sound absorption device; 901, metal plate; 902, sound absorption material filling layer; 10, MIC sound control sensor; 11, feeding device; 1101, fixed base ;1102, slide rail; 1103, pneumatic slider; 1104, sliding platform; 1105, push source; 1106, experimental test bench; 1107, limit slot; 1108, fixed limit block; 1109, limit cylinder; 1110, slide Limit block; 12, industrial control box; 13, industrial control display screen; 14, surveillance camera; 15, lighting fixtures; 16, three-color signal indicator.
  • a mute test system includes a mute test box, a noise measurement device, a feeding device 11 and a control system;
  • the mute test box includes an inner sound insulation box 1, an outer sound insulation box 2 and a vibration damping device 3. Both the inner sound insulation box 1 and the outer sound insulation box 2 are provided with sound insulation. Door 4, anti-leakage and sound-proof junction box 5, inspection door 6, a lifting device 7 is provided inside the sound-insulating door 4 of the inner sound-insulating box 1, and the sound-insulating door 4 of the outer sound-insulating box 2 is provided with a lifting device 7. A pressing device 8 is arranged on the outside, and a sound absorbing device 9 is also arranged in the inner sound insulation box 1 .
  • the vibration damping device 3 includes a plurality of medium and high frequency vibration dampers 301 arranged between the inner sound insulation box 1 and the outer sound insulation box 2 , and a plurality of medium and high frequency vibration dampers 301 arranged between the outer sound insulation box 2 .
  • the lower load-bearing bracket 302 and a plurality of low-frequency shock absorbers 303 are combined to reduce vibration and noise of different frequencies, reduce vibration and noise from solid transmission in the silent test box, and improve the acoustic environment quality in the silent test box.
  • the medium and high frequency shock absorber 301 is a rubber damping shock absorber, and the rubber damping shock absorber has high elasticity and viscoelasticity; compared with the steel material, the elastic deformation of rubber is very large, and the elastic modulus is very large. Small; the impact stiffness of rubber is greater than the dynamic stiffness, and the dynamic stiffness is greater than the static stiffness, which is conducive to reducing impact deformation and dynamic deformation; therefore, the rubber damping shock absorber can effectively reduce medium and high frequency vibration noise.
  • the low-frequency shock absorbers 303 are arranged at the four corners of the load-bearing bracket 302, and the low-frequency shock absorbers 303 are spring composite damping shock absorbers, and the spring composite damping shock absorbers Also known as prestressed spring shock absorber, it has the dual advantages of low frequency and large damping, eliminating the inherent resonance amplitude phenomenon of the spring.
  • a limit block 304 is provided on the load-bearing bracket 302 , and the limit block 304 protrudes upward and is disposed on the edge of the load-bearing bracket 302 to prevent the silent test box from moving.
  • the anti-leakage sound passing box 5 is inserted through the side walls of the inner sound insulation box 1 and the outer sound insulation box 2, and is used to pass through all the holes in the silent test box.
  • the pipeline is required, including the fixing frame 501 arranged on the outer side of the inner sound insulation box 1 and the outer sound insulation box 2, and a wire-passing combination module embedded in the inner sound insulation box 1 and the outer sound insulation box 2,
  • the outer side of the wire-passing combination module is provided with protrusions protruding from the inner sound insulation box 1 and the outer sound insulation box 2, and the fixing frame 201 is sleeved on the protrusions.
  • the combined module includes at least two layers of wire-passing sub-modules 502 arranged in clamping, the multi-layered wire-passing sub-modules 502 are connected by bolt locking, and a centerline of the adjacent two-layer wire-passing sub-modules 502 after clamping is opened.
  • Line hole 503, the line hole 503 is matched with the required pipeline clearance to ensure that the required pipeline passes through the line hole 503, and at the same time, there is no gap between the required pipeline and the line hole 503, so as to meet the requirements of threading and passing through the pipe. Acoustic airtightness and good sound insulation performance.
  • the fixing frame 501 is fixed to the outside of the inner sound insulation box 1 and the outer sound insulation box 2 through fixing bolts 504, and the fixing frame 501 is detachably connected to the wire-passing combination module through
  • the fixing frame is respectively fixedly connected with the inner sound insulation box 1, the outer sound insulation box 2 and the wire-passing combination module, to limit and fix the position of the wire-passing combination module, and prevent the fixed position of the wire-passing combination module from being relative to the inner layer insulation.
  • the acoustic box body 1 and the outer sound insulation box body 2 slide.
  • the specific installation process of the leak-proof sound-passing box 5 is as follows: firstly, open the two adjacent layers of wire-passing sub-modules 502, and place the required pipelines in the adjacent two.
  • the wire-passing sub-module 502 is clamped and fixed by bolting, and one end of the wire-passing sub-module 502 is inserted into Inside the fixing frame 501, connect and fix the fixing frame 501 with the connecting bolts 505, and then embed the other end of the wire-passing sub-module 502 into the inner sound insulation box 1 and the outer sound insulation box 2, and finally fix the fixing frame.
  • 501 is locked and fixed to the outside of the inner layer sound insulation box 1 and the outer layer sound insulation box 2 by fixing bolts 504 .
  • the number of wire passage holes 503 is determined according to the number of the pipelines to prevent redundant wire passage holes 503. However, in the actual use process, some equipment in the silent test box It may not need to be used, so there will be redundant wire passage holes 503. At this time, the wire passage sub-module 502 of the clamping mold can be replaced with the wire passage sub-module 502 matching the required number of pipelines, or the redundant wire passage sub-module 502 can be replaced.
  • the expanded sound-absorbing tampon is inserted into the thread hole 503. Since the expanded sound-absorbing tampon has ductility, the expanded sound-absorbing tampon is in an interference fit with the thread hole 503 to ensure that the expanded sound-absorbing tampon can block the thread. hole 503.
  • the lifting device 7 includes a first rotating support assembly 701 disposed on the sound insulation door 4 of the inner sound insulation box 1 and a second rotating support assembly disposed on the inner sound insulation box 1 702, the first rotating support assembly 701 includes a first support base and a first rotating head, the second rotating support assembly 702 includes a second support base and a second rotating head, the first rotating head and the second rotating head A telescopic cylinder 703 is arranged between the heads, and the telescopic cylinder 703 drives the sound insulation door 4 to open or close.
  • the first rotating support assembly 701 and the second rotating support assembly 702 When the relative position of the sound insulation door 4 changes, through the rotation of the first rotating head and the second rotating head, the angle of the telescopic cylinder 703 changes during the process of changing the position, so as to realize the automatic opening and closing of the sound insulation door 4.
  • the telescopic air cylinder 703 drives the sound insulation door 4 to continue to apply pressure in the direction of the inner sound insulation box 1, and presses the sound insulation door 4 to the inner sound insulation box 1, so as to ensure that the sound insulation door 4 is connected to the inner sound insulation box 1.
  • the sound insulation boxes 1 are in a state of extreme compression, which ensures that there is no gap between the sound insulation door 4 and the inner layer sound insulation box 1, and improves the sound insulation effect.
  • a sealing strip is arranged between the sound insulation door 4 and the inner sound insulation box 1, and the sealing The strips are arranged on the outer periphery of the inner wall of the sound insulation door 4 or on the inner wall of the inner layer sound insulation box 1 .
  • the pressing device 8 includes a fixed pressing block 801 arranged on the side of the sound insulation door 4 of the outer sound insulation box 2 and a pressing component arranged on the outer sound insulation box 2 .
  • the tightening assembly includes a pressing cylinder 802, a door tongue pressing block 803 and a door tongue fixing support 804, the door tongue fixing support 804 is arranged on the outer sound insulation box 2, and the door tongue pressing block 803 is hinged through a pivot.
  • the pressing cylinder 802 drives the door tongue pressing block 803 to move in the direction close to or away from the fixed pressing block 801 to realize the opening and closing action of the door tongue pressing block 803.
  • the door tongue pressing block 803 is in the open state, all the The sound insulation door 4 can be opened relative to the outer sound insulation box 2.
  • the pressing cylinder 802 drives the door tongue pressure block 803 to continue to apply pressure to the fixed pressure block 801.
  • a sealing strip is arranged between the sound insulation door 4 and the outer sound insulation box 2, and the sealing The strips are arranged on the outer periphery of the inner wall of the sound insulation door 4 or on the outer wall of the outer sound insulation box 2 .
  • a handle 805 is further provided on the outer side of the sound insulation door 4 to facilitate opening or closing of the sound insulation door 4 .
  • the sound absorption device 9 includes a metal plate 901 arranged in the inner sound insulation box 1 , and the metal plate 901 is arranged on the inner walls of the six surfaces of the inner sound insulation box 1 .
  • the metal plates 901 on two adjacent sides are spliced together, and the metal plates 901 on the six sides are spliced to form a metal plate cavity.
  • a sound-absorbing material filling layer 902 is arranged between the sound-absorbing material and the inner wall of the inner sound-insulating box 1. During the mute test, when the sound is transmitted to the metal plate 901, a part of the sound enters the sound-absorbing material through the through holes on the metal plate 901.
  • the generation of reflected sound energy is reduced, and another part of the sound can also enter the sound-absorbing material filling layer 902 after a single reflection to reduce the generation of repeatedly reflected sound energy, so that the inner layer of the sound insulation box 1
  • the reverberation sound energy inside is controlled within a certain reasonable range, so as to avoid the influence of the reverberation sound in the inner sound insulation box 1 on the objective value of the test data.
  • a rectangular keel frame is provided in the inner sound insulation box 1, and the rectangular keel frame can The sound insulation box 1 is taken out.
  • the corners of the metal plate 901 are provided with a plurality of perforations for bolts to pass through, and the rectangular keel frame is provided with a plurality of screw holes with matching perforations.
  • the bolts passing through the holes are screwed into the screw holes of the rectangular keel frame and installed on the rectangular keel frame.
  • the metal plate 901 is detachably installed on the rectangular keel frame, and the metal plate can be replaced when different sound absorption effects are required. 901.
  • the perforation rate of the metal plate 901 can be changed between 25% and 75%, and the diameter of the through holes on the metal plate 901 can be changed between 2mm and 4mm.
  • the surface of the metal plate 901 is coated with an anti-corrosion coating. Coated with fire retardant coating.
  • the noise measurement device is used to detect the audio frequency data of the test product in the silent test box.
  • the noise measurement device includes a MIC sound control sensor 10 and a sound level meter.
  • the MIC sound control sensor 10 is arranged in the silent test box.
  • the sound level meter is set in the control system, and the noise measurement device can identify various weighted sound pressure levels, sound spectrums, and sound pressure amplitudes of the test product.
  • the feeding device 11 is set in the silent test box, the feeding device 11 includes a fixed base 1101 , a sliding device is provided on the fixed base 1101 , and the sliding device includes a fixed base 1101 .
  • the sliding rail 1102, the pneumatic slider 1103 matched with the sliding rail 1102, the sliding platform 1104 arranged on the pneumatic slider 1103, the sliding platform 1104 is provided with a secondary pushing device, the secondary pushing
  • the device includes a push source 1105 and an experimental test bench 1106.
  • the experimental test bench 1106 is provided with a product limiting fixture.
  • the pneumatic slider 1103 drives the sliding platform 1104 along the slide rail 1102 to push out the mute test box.
  • the push source 1105 of the secondary push-out device drives the experimental test bench 1106 to be further pushed out of the silent test box, extending the stroke of the experimental test bench 1106 in the silent test box, and after the experimental test bench 1106 is pushed out , place the test product on the product limit fixture, clamp and fix it, and there is no need for testers to measure and calibrate the placement position of the test product.
  • the experimental test table 1106 is pulled back into the silent test box through the secondary push device and sliding device, and the test is completed. After that, the action is repeated again, which reduces a lot of unnecessary human operation process, which not only ensures the test accuracy of the product, but also greatly reduces the work intensity of the tester.
  • the product limiting fixture includes a limiting groove 1107 matching the shape of the test product, a fixed limiting block 1108 is provided on one side of the limiting groove 1107 , and a fixed limiting block 1108 is provided on the other side of the limiting groove 1107
  • Set the sliding limit block 1110 connected with the limit cylinder 1109 first place the test product in the limit groove 1107, determine the position of the test product through the shape-matched limit groove 1107, and then push the sliding limit through the limit cylinder 1109
  • Block 1110 clamps the test product in place.
  • control system is electrically connected with the silent test box, the noise measuring device, and the feeding device 11 to control the operation of the entire system.
  • the control system includes an industrial control box 12 and an industrial control display screen 13, and the industrial control box 12 includes a computer Host, acquisition card, sound level meter, electrical control switch, solenoid valve, cooling fan, control button, the control box 12 integrates the control of the cylinder action of the entire test system and the processing of the cylinder induction signal through the electrical control switch and solenoid valve ;Acquisition, output, data calculation, data analysis, identification and judgment, and storage of acoustic measurement signals are realized through the computer host, acquisition card, and sound level meter, and the manual interaction between the system and the operator is realized through the industrial control display screen 13 and control buttons. .
  • the silent test box is also provided with a monitoring camera 14 and a lighting fixture 15, which can realize real-time monitoring of the test product.
  • a three-color signal indicator light 16 is also provided outside the mute test box, which identifies three test states with different definitions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

Système d'essai de mise en sourdine, comprenant une boîte d'essai de mise en sourdine, un dispositif de mesure de bruit, un dispositif d'alimentation (11) et un système de commande. La boîte d'essai de mise en sourdine comprend un corps de boîte d'isolation acoustique de couche interne (1), un corps de boîte d'isolation acoustique de couche externe (2) et un dispositif d'amortissement de vibrations (3). Chacun du corps de boîte d'isolation acoustique de couche interne (1) et du corps de boîte d'isolation acoustique de couche externe (2) est pourvu d'une porte d'isolation acoustique (4), d'une boîte de passage de fil de prévention de fuite acoustique (5) et d'une porte d'accès (6). Un dispositif de levage (7) est disposé sur le côté interne de la porte d'isolation acoustique (4) du corps de boîte d'isolation acoustique de couche interne (1). Un dispositif de pression (8) est disposé sur le côté externe de la porte d'isolation acoustique (4) du corps de boîte d'isolation acoustique de couche externe (2). Un dispositif d'absorption acoustique (9) est en outre disposé dans le corps de boîte d'isolation acoustique de couche interne (1). Le dispositif de mesure de bruit est utilisé pour détecter des données audio d'un produit d'essai dans la boîte d'essai de mise en sourdine. Le dispositif d'alimentation (11) peut se déplacer dans la boîte d'essai de mise en sourdine ou hors de cette dernière pour saisir ou placer un produit d'essai. Le système de commande est électriquement connecté à la boîte d'essai de mise en sourdine, au dispositif de mesure de bruit et au dispositif d'alimentation (11) pour commander le fonctionnement de l'ensemble du système. Le système d'essai de mise en sourdine peut fournir une boîte d'essai de mise en sourdine qui procure un environnement de détection ayant un bruit ultra faible et un système d'essai parfait.
PCT/CN2021/094752 2020-09-01 2021-05-20 Système d'essai de mise en sourdine WO2022048189A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010906241.8 2020-09-01
CN202010906241.8A CN111964938A (zh) 2020-09-01 2020-09-01 一种静音测试系统

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WO2022048189A1 true WO2022048189A1 (fr) 2022-03-10

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PCT/CN2021/094752 WO2022048189A1 (fr) 2020-09-01 2021-05-20 Système d'essai de mise en sourdine

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CN (1) CN111964938A (fr)
WO (1) WO2022048189A1 (fr)

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CN114778685A (zh) * 2022-06-21 2022-07-22 江苏声望声学装备有限公司 一种隔声门隔音效果测试装置
CN115175083A (zh) * 2022-07-06 2022-10-11 广东万喜至工业设计有限公司 一种升降式双屏蔽层测试箱设备
CN116202883A (zh) * 2023-05-05 2023-06-02 常州中晶自保温墙体材料有限公司 一种混凝土陶粒砌块抗压隔音性能测试装置

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Publication number Priority date Publication date Assignee Title
TW202229822A (zh) * 2021-01-22 2022-08-01 建準電機工業股份有限公司 風扇異音檢測方法及系統

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