A mute test system

Abstract

The application discloses a mute test system, which comprises a mute test box, a noise measuring device, a feeding device and a control system. The mute test box comprises an inner sound insulation box body, an outer sound insulation box body and a damping device. The inner sound insulation box body and the outer sound insulation box body are both provided with sound insulation doors, sound leakage prevention wire passing boxes and maintenance doors. The inner side of the sound insulation door of the inner sound insulation box body is provided with a lifting device, and the outer side of the sound insulation door of the outer sound insulation box body is provided with a pressing device. The inner sound insulation box body is further provided with a sound absorption device. The noise measuring device is used for detecting the audio frequency data of a test product in the mute test box. The feeding device can enter and exit the mute test box and is used for taking and placing the test product. The control system is electrically connected with the mute test box, the noise measuring device and the feeding device and is used for controlling the working of the whole system. The mute test box can provide a detection environment with ultra-low noise, and the mute test system is perfect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mute test, in particular to a mute test system. BACKGROUND

[0002] The mute test box is also called sound insulation box and sound shielding box, which is a device for meeting the low noise environment requirement of sound frequency test. The mute test box is made of sound absorption, damping, sound insulation and vibration reduction materials to provide a low noise detection environment far lower than the environmental noise for noise detection of products, and the acoustic performance index requirement is high.

[0003] At present, the test items of the tested products are more and more, and the test indexes are higher and higher. The traditional mute test box has the following shortcomings:

[0004] 1. The background noise value is relatively high, and it is difficult to be lower than 20 decibels; it is difficult to meet the requirement of low noise test environment;

[0005] 2. The actual sound insulation of the sound insulation door is often much lower than the theoretical sound insulation, and the gap leakage of the sound insulation door and the box body leads to the door leakage;

[0006] 3. The opening mode of the door is basically manual, and the sound insulation door is relatively heavy and needs to be tightly sealed, which is not labor-saving for the production line high-frequency detection, and the operation is not convenient;

[0007] 4. The low noise background is extremely sensitive to vibration, and the imperfect matching of the damping system greatly affects the background noise value in the box body.

[0008] 5. Since the test equipment is arranged in the mute test box, the test equipment needs to be powered or ventilated, so a through hole for threading and piping is arranged in the mute test box, and the sound will be transmitted outward from the through hole;

[0009] 6. Due to the size limitation, it is difficult to install the wideband sound absorption coefficient material (especially the low frequency band) in the box body, which easily leads to large low frequency reverberation sound energy in the box body. When the net size of the box body is designed unreasonably, standing wave phenomenon is easily generated in the low frequency band, so that the test data deviates from the objective reality and is invalid.

[0010] 7. Since the mute box is generally deep, and the door hole is generally small to ensure the sound insulation effect, it is inconvenient for the test personnel to repeatedly replace the test products;

[0011] In order to overcome the above shortcomings, a mute test box capable of providing an ultra-low noise detection environment and a perfect mute test system are needed. SUMMARY

[0012] The technical problem solved by the present application is to provide a mute test system, a mute test box capable of providing a detection environment with ultra-low background noise and a perfect test system.

[0013] In order to solve the above technical problem, the present application provides a mute test system, characterized in that it comprises a mute test box, a noise measuring device, a feeding device and a control system.

[0014] The mute test box comprises an inner sound insulation box body, an outer sound insulation box body and a damping device, the inner sound insulation box body and the outer sound insulation box body are both provided with sound insulation doors, sound leakage prevention wire passing boxes and maintenance doors, the inner side of the sound insulation door of the inner sound insulation box body is provided with an automatic lifting device, the outer side of the sound insulation door of the outer sound insulation box body is provided with a pressing device, and the inner sound insulation box body is further provided with a special structure sound absorption device.

[0015] The noise measuring device is used for detecting the audio data of the test product in the mute test box.

[0016] The feeding device can enter and exit the mute test box and is used for taking and placing the test product.

[0017] The control system is electrically connected with the mute test box, the noise measuring device and the feeding device and is used for controlling the whole system to work.

[0018] In a preferred embodiment of the present application, the damping device comprises a plurality of medium-high frequency dampers arranged between the inner sound insulation box body and the outer sound insulation box body and a plurality of low frequency dampers and a load bearing support arranged below the outer sound insulation box body, the plurality of medium-high frequency dampers are arranged in a rectangular array between the inner sound insulation box body and the outer sound insulation box body, the plurality of low frequency dampers are arranged at four corners of the load bearing support, a limiting block is arranged on the load bearing support, the limiting block protrudes upward and is arranged at the edge of the load bearing support, and the limiting block limits the position of the outer sound insulation box body.

[0019] In a preferred embodiment of the present application, the sound leakage prevention wire passing box is embedded in the side walls of the inner sound insulation box body and the outer sound insulation box body and is used for passing the required pipelines into the mute test box, the sound leakage prevention wire passing box comprises a fixed frame arranged outside the inner sound insulation box body and the outer sound insulation box body and a wire passing combination module embedded in the inner sound insulation box body and the outer sound insulation box body, a protruding portion protruding from the inner sound insulation box body and the outer sound insulation box body is arranged outside the wire passing combination module, the fixed frame is sleeved on the protruding portion, the wire passing combination module comprises at least two layers of wire passing sub-modules arranged in combination, a plurality of layers of wire passing sub-modules are connected through bolt locking, a wire passing hole is arranged on the center line of the adjacent two layers of wire passing sub-modules after combination, the wire passing hole is gap matched with the required pipelines, and maintenance is convenient.

[0020] In a preferred embodiment of the present application, the lifting device further comprises a first rotating support assembly arranged on the sound insulation door of the inner sound insulation box and a second rotating support assembly arranged on the inner sound insulation box, the first rotating support assembly comprises a first support base and a first rotating head, the second rotating support assembly comprises a second support base and a second rotating head, a telescopic air cylinder is arranged between the first rotating head and the second rotating head, and the telescopic air cylinder drives the sound insulation door to open or close; when the sound insulation door is in a closed state, the telescopic air cylinder drives the sound insulation door to continue to apply pressure to the inner sound insulation box, so as to press the sound insulation door tightly against the inner sound insulation box.

[0021] In a preferred embodiment of the present application, the pressing device further comprises a fixed pressing block arranged on the side of the sound insulation door of the outer sound insulation box and a pressing assembly arranged on the outer sound insulation box, the pressing assembly comprises a pressing air cylinder, a door tongue pressing block and a door tongue fixed support, the door tongue fixed support is arranged on the outer sound insulation box, the door tongue pressing block is hinged to the door tongue fixed support through a pivot, the door tongue pressing block on one side of the pivot abuts against the fixed pressing block, the door tongue pressing block on the other side of the pivot is connected with the pressing air cylinder, the pressing air cylinder drives the door tongue pressing block to move towards or away from the fixed pressing block, so as to realize the opening and closing actions of the door tongue pressing block; when the door tongue pressing block is in a closed state, the pressing air cylinder drives the door tongue pressing block to continue to apply pressure to the fixed pressing block, so as to press the door tongue pressing block tightly against the fixed pressing block.

[0022] In a preferred embodiment of the present application, the sound absorption device further comprises a metal plate arranged in the inner sound insulation box, the metal plate is arranged on the inner wall of six faces of the inner sound insulation box, the metal plates on any two adjacent faces are arranged in a splicing mode, the metal plates on the six faces are spliced to form a metal plate cavity, a plurality of through holes penetrating through the metal plate are formed in the metal plate, and a sound absorption material filling layer is arranged between the metal plate and the inner wall of the inner sound insulation box.

[0023] In a preferred embodiment of the present application, the noise measurement device further comprises a MIC sound sensor and a sound level meter, the MIC sound sensor is arranged in the mute test box, and the sound level meter is arranged in the control system; the noise measurement device can identify various weighted sound pressure levels, sound spectra and sound pressure amplitudes of the test product.

[0024] In a preferred embodiment of the present application, the feeding device is arranged in the mute test box, and the feeding device comprises a fixed base, a sliding device is arranged on the fixed base, the sliding device comprises a sliding rail arranged on the fixed base, a pneumatic sliding block matched with the sliding rail and a sliding platform arranged on the pneumatic sliding block, a secondary pushing device is arranged on the sliding platform, the secondary pushing device comprises a pushing source and an experimental test table, and a product limiting clamp is arranged on the experimental test table.

[0025] In a preferred embodiment of the present invention, the control system further includes an industrial control box and an industrial control display screen. The industrial control box includes a computer host, a data acquisition card, a sound level meter, an electrical control switch, a solenoid valve, a cooling fan, and control buttons. The control box integrates the control of the cylinder action of the entire testing system, the processing of cylinder sensing signals, the acquisition, output, data processing, data analysis, identification and judgment, and storage of sound measurement signals.

[0026] In a preferred embodiment of the present invention, the silent test chamber is further equipped with a monitoring camera and lighting fixtures.

[0027] The beneficial effects of this invention are:

[0028] The present invention uses internal and external soundproof enclosures to form the main soundproof structure of the silent test box, which can effectively control airborne sound transmission.

[0029] By using vibration damping devices to reduce vibration noise of different frequencies, the vibration noise transmitted from solids inside the silent test chamber is reduced, thereby improving the acoustic environment quality inside the silent test chamber.

[0030] The soundproof junction box enables the wiring and conduit installation inside the silent test box, while also ensuring the acoustic tightness of the wiring and conduit installation, thus providing excellent sound insulation performance.

[0031] The soundproof door is pressed against the inner and outer soundproof enclosures by the lifting and pressing devices, respectively, to ensure that the soundproof door is in a state of extreme compression with the inner and outer soundproof enclosures, and to ensure that there are no gaps between the soundproof door and the silent test box, thereby improving the sound insulation effect.

[0032] By reducing the generation of reflected sound energy through sound absorption devices, the reverberation energy inside the chamber is controlled within a reasonable range, thus avoiding the impact of reverberation inside the test chamber on the objective values ​​of the test data.

[0033] By using a double-layer main sound insulation structure, vibration damping device, anti-leakage junction box, lifting device, clamping device, and sound absorption device, the sound insulation effect is comprehensively improved by controlling noise generation, noise propagation path, and noise propagation route, providing an ultra-low noise testing environment.

[0034] The feeding device enables the experimental test bench to move in and out of the silent test chamber, and realizes the automatic extension and retraction function of the experimental test bench, making it convenient to take out and put in the test products from the silent test chamber.

[0035] The noise testing system of the present invention also includes a noise measuring device inside the noise testing chamber and a control system that is electrically connected to all devices inside the noise testing chamber outside the noise testing chamber, thereby realizing the operation and control of the entire noise testing system. Attached Figure Description

[0036] Figure 1 is the overall side structure schematic diagram of the mute test system of the application;

[0037] Figure 2 is the overall top view structure schematic diagram of the mute test box of the application

[0038] Figure 3 is the structure schematic diagram of the vibration reduction device of the application;

[0039] Figure 4 is the structure schematic diagram of the sound leakage prevention overline box of the application;

[0040] Figure 5 is the structure schematic diagram of the lifting device of the application;

[0041] Figure 6 is the structure schematic diagram of the pressing device of the application;

[0042] Figure 7 is the structure schematic diagram of the sound absorption device of the application;

[0043] Figure 8 is the structure schematic diagram of the feeding device of the application.

[0044] Explanation of figure marks: 1, inner layer sound insulation box body; 2, outer layer sound insulation box body; 3, vibration reduction device; 301, medium-high frequency vibration reducer; 302, load bearing support; 303, low frequency vibration reducer; 304, limit block; 4, sound insulation door; 5, sound leakage prevention overline box; 501, fixed frame; 502, overline sub-module; 503, overline hole; 504, fixed bolt; 505, connecting bolt; 6, maintenance door; 7, lifting device; 701, first rotating support assembly; 702, second rotating support assembly; 703, telescopic air cylinder; 8, pressing device; 801, fixed pressing block; 802, pressing air cylinder; 803, door tongue pressing block; 804, door tongue fixed 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 sliding block; 1104, sliding platform; 1105, pushing source; 1106, experimental test table; 1107, limit groove; 1108, fixed limit block; 1109, limit air cylinder; 1110, sliding limit block; 12, industrial control box; 13, industrial control display screen; 14, monitoring camera; 15, lighting lamp; 16, three-color signal indicator light. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the drawings and specific embodiments so that those skilled in the art can better understand the application and implement it.

[0046] Referring to Figures 1-2 As shown in the figure, an embodiment of the mute test system of the application, a mute test system, comprising a mute test box, a noise measuring device, a feeding device 11 and a control system;

[0047] The mute test box comprises an inner layer sound insulation box body 1, an outer layer sound insulation box body 2 and a damping device 3, the inner layer sound insulation box body 1 and the outer layer sound insulation box body 2 are both provided with sound insulation doors 4, sound leakage prevention wire passing boxes 5 and maintenance doors 6, the inner side of the sound insulation door 4 of the inner layer sound insulation box body 1 is provided with a lifting device 7, the outer side of the sound insulation door 4 of the outer layer sound insulation box body 2 is provided with a pressing device 8, and the inner layer sound insulation box body 1 is further provided with a sound absorption device 9.

[0048] Referring to Figure 3 As shown in the figure, the damping device 3 comprises a plurality of medium-high frequency dampers 301 arranged between the inner layer sound insulation box body 1 and the outer layer sound insulation box body 2, a load bearing support 302 arranged below the outer layer sound insulation box body 2 and a plurality of low frequency dampers 303; by combining different frequencies of vibration noise, the vibration noise from solid propagation in the mute test box is reduced, and the sound environment quality in the mute test box is improved.

[0049] In order to ensure the stability of the support and ensure that each medium-high frequency damper 301 is uniformly stressed, a plurality of the medium-high frequency dampers 301 are arranged in a rectangular array between the inner layer sound insulation box body 1 and the outer layer sound insulation box body 2, the medium-high frequency damper 301 is a rubber damping damper, and the rubber damping damper has high elasticity and viscoelasticity; compared with steel materials, the elastic deformation of rubber is very large, and the elastic modulus is very 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 damper can effectively reduce medium-high frequency vibration noise.

[0050] In order to ensure the stability of the support, a plurality of the low frequency dampers 303 are arranged at four corners of the load bearing support 302, the low frequency damper 303 is a spring composite damping damper, also known as a pre-stressed spring damper, which has the dual advantages of low frequency and large damping, and eliminates the inherent resonance amplitude phenomenon of the spring.

[0051] In order to limit the position of the mute test box on the load bearing support 302, a limiting block 304 is arranged on the load bearing support 302, the limiting block 304 is protrudingly arranged upward on the edge of the load bearing support 302 to prevent the mute test box from moving.

[0052] Referring toFigure 4 The anti-leakage sound wire box 5 is embedded in the side walls of the inner sound insulation box 1 and the outer sound insulation box 2, and is used for passing the required pipelines into the sound test box. The anti-leakage sound wire box 5 comprises a fixed frame 501 arranged outside 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 wire passing combination module is provided with a protruding part protruding from the inner sound insulation box 1 and the outer sound insulation box 2. The fixed frame 201 is arranged on the protruding part. The wire passing combination module comprises at least two layers of wire passing sub-modules 502 arranged in combination. The wire passing sub-modules 502 are connected by bolts. A wire passing hole 503 is arranged on the center line of the wire passing sub-modules 502 arranged in combination. The wire passing hole 503 is in gap cooperation with the required pipelines, so that the required pipelines pass through the wire passing hole 503 and there is no gap between the required pipelines and the wire passing hole 503, thereby meeting the acoustic sealing requirement of the wire passing and having good sound insulation performance.

[0053] The fixed frame 501 is fixed outside the inner sound insulation box 1 and the outer sound insulation box 2 by bolts 504. The fixed frame 501 is detachably connected with the wire passing combination module by connecting bolts 505. The fixed frame is fixedly connected with the inner sound insulation box 1, the outer sound insulation box 2 and the wire passing combination module, so as to limit and fix the position of the wire passing combination module and prevent the position of the wire passing combination module from sliding relative to the inner sound insulation box 1 and the outer sound insulation box 2. The installation process of the anti-leakage sound wire box 5 is as follows: first, the adjacent wire passing sub-modules 502 are opened, the required pipelines are arranged in the wire passing hole 503 between the adjacent wire passing sub-modules 502, after all the required pipelines are arranged, the wire passing sub-modules 502 are arranged in combination and fixed by bolts, one end of the wire passing sub-modules 502 is inserted into the fixed frame 501 and connected with the fixed frame 501 by the connecting bolts 505, the other end of the wire passing sub-modules 502 is embedded in the inner sound insulation box 1 and the outer sound insulation box 2, and finally the fixed frame 501 is fixed outside the inner sound insulation box 1 and the outer sound insulation box 2 by the bolts 504.

[0054] Specifically, when the wire passing hole 503 is arranged, the number of the wire passing hole 503 is determined according to the number of the pipelines, so as to prevent excessive wire passing holes 503. However, in actual use, some devices in the sound test box may not be used, so that there are excessive wire passing holes 503. At this time, the wire passing sub-modules 502 arranged in combination can be replaced with wire passing sub-modules 502 matched with the number of the required pipelines, or the expanded sound absorption cotton bars can be inserted into the excessive wire passing holes 503. Since the expanded sound absorption cotton bars have ductility, the expanded sound absorption cotton bars are in interference fit with the wire passing holes 503, so as to ensure that the expanded sound absorption cotton bars can block the wire passing holes 503.

[0055] Referring to Figure 5 As shown in the figure, the lifting device 7 includes a first rotating support assembly 701 arranged on the sound insulation door 4 of the inner sound insulation box 1 and a second rotating support assembly 702 arranged on the inner sound insulation box 1, 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, a telescopic air cylinder 703 is arranged between the first rotating head and the second rotating head, the telescopic air cylinder 703 drives the sound insulation door 4 to open or close, the relative positions of the first rotating support assembly 701 and the second rotating support assembly 702 change in the process of opening and closing the sound insulation door 4, the angle of the telescopic air cylinder 703 changes in the process of realizing the position change through the rotation of the first rotating head and the second rotating head, so as to realize the automatic opening and closing of the sound insulation door 4, when the sound insulation door 4 is in the closed state, the telescopic air cylinder 703 drives the sound insulation door 4 to continue to apply pressure to the inner sound insulation box 1, and the sound insulation door 4 is pressed tightly on the inner sound insulation box 1, so as to ensure that the sound insulation door 4 and the inner sound insulation box 1 are in the limit tight state, ensure that there is no gap between the sound insulation door 4 and the inner sound insulation box 1, and improve the sound insulation effect.

[0056] In order to further improve the sealing effect between the sound insulation door 4 and the inner sound insulation box 1, a sealing strip is arranged between the sound insulation door 4 and the inner sound insulation box 1 in the embodiment, and the sealing strip is arranged on the outer periphery of the inner wall of the sound insulation door 4 or on the inner wall of the inner sound insulation box 1.

[0057] Referring to Figure 6 As shown in the figure, 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 assembly arranged on the outer sound insulation box 2, the pressing assembly includes a pressing air cylinder 802, a door tongue pressing block 803 and a door tongue fixed support 804, the door tongue fixed support 804 is arranged on the outer sound insulation box 2, the door tongue pressing block 803 is hinged on the door tongue fixed support 804 through a pivot, one side of the pivot of the door tongue pressing block 803 abuts against the fixed pressing block 801, the other side of the pivot of the door tongue pressing block 803 is connected with the pressing air cylinder 802, the pressing air cylinder 802 drives the door tongue pressing block 803 to move towards or away from the fixed pressing block 801, so as to realize the opening and closing action of the door tongue pressing block 803, when the door tongue pressing block 803 is in the open state, the sound insulation door 4 can be opened relative to the outer sound insulation box 2, when the door tongue pressing block 803 is in the closed state, the pressing air cylinder 802 drives the door tongue pressing block 803 to continue to apply pressure to the fixed pressing block 801, and the door tongue pressing block 803 is pressed tightly on the fixed pressing block 801, so as to ensure that the sound insulation door 4 and the outer sound insulation box 2 are in the limit tight state, ensure that there is no gap between the sound insulation door 4 and the outer sound insulation box 2, and improve the sound insulation effect.

[0058] In order to further improve the sealing effect between the sound insulation door 4 and the outer layer sound insulation box body 2, the sealing strip is arranged between the sound insulation door 4 and the outer layer sound insulation box body 2 in the embodiment, and the sealing strip is arranged on the outer wall of the sound insulation door 4 or the outer wall of the outer layer sound insulation box body 2.

[0059] Specifically, the outer side of the sound insulation door 4 is further provided with a handle 805, so as to facilitate opening or closing of the sound insulation door 4.

[0060] Referring to Figure 7 As shown in the figure, the sound absorption device 9 includes a metal plate 901 arranged in the inner layer sound insulation box body 1, the metal plate 901 is arranged on the inner wall of the six faces of the inner layer sound insulation box body 1, the metal plates 901 on any two adjacent faces are arranged in splicing mode, the metal plates 901 on the six faces are spliced to form a metal plate cavity, a plurality of through holes penetrating through the metal plate 901 are formed in the metal plate 901, and a sound absorption material filling layer 902 is arranged between the metal plate 901 and the inner wall of the inner layer sound insulation box body 1. During the mute test, when the sound is transmitted to the metal plate 901, part of the sound enters the sound absorption material filling layer 902 through the through holes on the metal plate 901, the generation of reflected sound energy is reduced, and the other part of the sound can also enter the sound absorption material filling layer 902 after one-time reflection, the generation of repeatedly reflected sound energy is reduced, so that the reverberation sound energy in the inner layer sound insulation box body 1 is controlled within a certain reasonable range, and the influence of the reverberation sound in the inner layer sound insulation box body 1 on the objective value of the test data is avoided.

[0061] Specifically, in order to build and place the metal plate cavity of the embodiment in the inner layer sound insulation box body 1, a rectangular keel frame is arranged in the inner layer sound insulation box body 1, the rectangular keel frame can be taken out from the inner layer sound insulation box body 1, a plurality of through holes for bolts to pass through are arranged at the corners of the metal plate 901, a plurality of threaded holes matched with the through holes are arranged on the rectangular keel frame, and each metal plate 901 is installed on the rectangular keel frame by being screwed into the threaded hole of the rectangular keel frame through the bolt passing through the through hole, so that the metal plate 901 is installed on the rectangular keel frame in a detachable mode, and the metal plate 901 can be replaced when different sound absorption effects are required.

[0062] Specifically, according to different sound absorption requirements, the perforation rate of the metal plate 901 can be changed between 25% and 75%, and the aperture of the through hole on the metal plate 901 can be changed between 2mm and 4mm, and the higher the sound absorption requirement is, the larger the perforation rate and the aperture of the through hole are.

[0063] In order to prevent corrosion of the metal plate 901 in the long-term use process, a corrosion-resistant coating is coated on the surface of the metal plate 901; in order to prevent the internal test product from burning and destroying the mute test box during the test process, a fireproof coating is also coated on the metal plate 901.

[0064] Specifically, the noise measuring device is used for detecting the audio frequency data of the test product in the soundproof test box, and the noise measuring device comprises a MIC sound control sensor 10 and a sound level meter, the MIC sound control sensor 10 is arranged in the soundproof test box, and the sound level meter is arranged in the control system, and the noise measuring device can identify multiple weighted sound pressure levels, audio frequency spectrums and sound pressure amplitudes of the test product.

[0065] Referring to Figure 8 As shown in the figure, the feeding device 11 is arranged in the soundproof test box, the feeding device 11 comprises a fixed base 1101, a sliding device is arranged on the fixed base 1101, the sliding device comprises a sliding rail 1102 arranged on the fixed base 1101, a pneumatic sliding block 1103 matched with the sliding rail 1102, and a sliding platform 1104 arranged on the pneumatic sliding block 1103, a secondary pushing device is arranged on the sliding platform 1104, the secondary pushing device comprises a pushing source 1105 and an experimental test table 1106, a product limiting clamp is arranged on the experimental test table 1106, during testing, the sliding platform 1104 is first pushed out of the soundproof test box by the pneumatic sliding block 1103 along the sliding rail 1102, after the pneumatic sliding block 1103 reaches the maximum stroke, the pushing source 1105 of the secondary pushing device drives the experimental test table 1106 to be further pushed out of the soundproof test box, thereby prolonging the stroke of the experimental test table 1106 in the soundproof test box, after the experimental test table 1106 is pushed out, the test product is placed on the product limiting clamp and clamped and fixed, it is not necessary for the tester to measure and calibrate the placement position of the test product, finally, the experimental test table 1106 is pulled back into the soundproof test box through the secondary pushing device and the sliding device, after testing is completed, the pushing-out action is repeated again, a large number of unnecessary manual operation processes are reduced, the testing accuracy of the product is ensured, and the working intensity of the tester is greatly reduced.

[0066] Specifically, the product limiting clamp comprises a limiting groove 1107 matched with the shape of the test product, a fixed limiting block 1108 is arranged on one side of the limiting groove 1107, and a sliding limiting block 1110 connected with a limiting cylinder 1109 is arranged on the other side of the limiting groove 1107, the test product is first placed in the limiting groove 1107, the position of the test product is determined through the shape-matched limiting groove 1107, and then the test product is clamped and fixed by pushing the sliding limiting block 1110 through the limiting cylinder 1109.

[0067] Specifically, the control system is electrically connected with the mute test box, the noise measuring device and the feeding device 11, and is used for controlling the whole system to work, the control system comprises an industrial control box 12 and an industrial control display screen 13, the industrial control box 12 comprises a computer host, an acquisition card, a sound level meter, an electrical control switch, an electromagnetic valve, a cooling fan and control buttons, the control box 12 integrates the control of the cylinder action of the whole test system and the processing of the cylinder sensing signal through the electrical control switch and the electromagnetic valve; the acquisition, output, data operation, data analysis, identification, judgment and storage of the sound measurement signal are realized through the computer host, the acquisition card and the sound level meter; and the manual interaction between the system and the operator is realized through the industrial control display screen 13 and the control buttons.

[0068] Specifically, the mute test box is further provided with a monitoring camera 14 and a lighting lamp 15, and the real-time monitoring of the test product can be realized.

[0069] Specifically, the mute test box is further provided with a three-color signal indicating lamp 16, and three different defined test states are identified.

[0070] The above-mentioned embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. The equivalent replacement or transformation of the skilled in the art on the basis of the present application is within the protection scope of the present application. The protection scope of the present application is subject to the claims.

Claims

1. A mute test system, characterized by, The mute test box, the noise measuring device, the feeding device and the control system are included. The mute test box includes an inner sound insulation box, an outer sound insulation box and a damping device, the inner sound insulation box and the outer sound insulation box are provided with sound insulation doors, sound leakage prevention wire passing boxes and maintenance doors, the inner side of the sound insulation door of the inner sound insulation box is provided with a lifting device, the outer side of the sound insulation door of the outer sound insulation box is provided with a pressing device, and the inner sound insulation box is further provided with a sound absorption device. The sound leakage prevention wire passing box is embedded in the side walls of the inner sound insulation box and the outer sound insulation box, and is used for passing the required pipelines into the mute test box, and includes a fixed frame provided outside the inner sound insulation box and the outer sound insulation box and a wire passing combination module embedded in the inner sound insulation box and the outer sound insulation box, the outer side of the wire passing combination module is provided with a protruding part protruding from the inner sound insulation box and the outer sound insulation box, the fixed frame is sleeved on the protruding part, the wire passing combination module includes at least two layers of wire passing sub-modules, the wire passing sub-modules are connected by bolts, and a wire passing hole is formed in the center line of the adjacent two layers of wire passing sub-modules after the modules are combined, and the wire passing hole is in gap cooperation with the required pipeline. The noise measuring device is used for detecting the sound data of the test product in the mute test box. The feeding device can enter and exit the mute test box, and is used for taking and placing the test product. The control system is electrically connected with the mute test box, the noise measuring device and the feeding device, and is used for controlling the whole system to work.

2. The mute test system of claim 1, wherein, The damping device includes a plurality of medium-high frequency dampers arranged between the inner sound insulation box and the outer sound insulation box, a load bearing support arranged below the outer sound insulation box and a plurality of low frequency dampers, the medium-high frequency dampers are arranged in a rectangular array between the inner sound insulation box and the outer sound insulation box, the low frequency dampers are arranged at four corners of the load bearing support, the load bearing support is provided with a limiting block, the limiting block is protrudingly arranged upward at the edge of the load bearing support, and the limiting block limits the position of the outer sound insulation box.

3. The mute test system of claim 1, wherein, The lifting device includes a first rotating support assembly arranged on the sound insulation door of the inner sound insulation box and a second rotating support assembly arranged on the inner sound insulation box, the first rotating support assembly includes a first support seat and a first rotating head, the second rotating support assembly includes a second support seat and a second rotating head, a telescopic air cylinder is arranged between the first rotating head and the second rotating head, the telescopic air cylinder drives the sound insulation door to open or close, when the sound insulation door is in the closed state, the telescopic air cylinder drives the sound insulation door to continue to apply pressure to the inner sound insulation box, and the sound insulation door is pressed tightly on the inner sound insulation box.

4. The mute test system of claim 1, wherein, The pressing device comprises a fixed pressing block arranged on the sound insulation door side of the outer sound insulation box body and a pressing assembly arranged on the outer sound insulation box body, the pressing assembly comprises a pressing cylinder, a door tongue pressing block and a door tongue fixed support, the door tongue fixed support is arranged on the outer sound insulation box body, the door tongue pressing block is hinged on the door tongue fixed support through a pivot, the door tongue pressing block on one side of the pivot abuts against the fixed pressing block, the door tongue pressing block on the other side of the pivot is connected with the pressing cylinder, the pressing cylinder drives the door tongue pressing block to move towards or away from the fixed pressing block, so as to realize the opening and closing action of the door tongue pressing block, when the door tongue pressing block is in the closed state, the pressing cylinder drives the door tongue pressing block to continue to apply pressure to the fixed pressing block, so as to press the door tongue pressing block against the fixed pressing block.

5. The mute test system of claim 1, wherein, The sound absorption device comprises a metal plate arranged in the inner sound insulation box body, the metal plate is arranged on the inner wall of six faces of the inner sound insulation box body, the metal plates on any two adjacent faces are arranged in a splicing mode, the metal plates on the six faces are spliced to form a metal plate cavity, a plurality of through holes penetrating through the metal plate are formed in the metal plate, and a sound absorption material filling layer is arranged between the metal plate and the inner wall of the inner sound insulation box body.

6. The mute test system of claim 1, wherein, The noise measuring device comprises a MIC sound control sensor and a sound level meter, the MIC sound control sensor is arranged in the mute test box, and the sound level meter is arranged in the control system, so that the noise measuring device can identify various weighted sound pressure levels, sound frequency spectrums and sound pressure amplitudes of the test product.

7. The mute test system of claim 1, wherein, The feeding device is arranged in the mute test box, and comprises a fixed base, a sliding device arranged on the fixed base, a sliding rail arranged on the fixed base, a pneumatic sliding block matched with the sliding rail and a sliding platform arranged on the pneumatic sliding block, a secondary pushing device arranged on the sliding platform, a pushing source and an experimental test table, and a product limiting clamp arranged on the experimental test table.

8. The mute test system of claim 1, wherein, The control system comprises an industrial control box and an industrial control display screen, the industrial control box comprises a computer host, an acquisition card, a sound level meter, an electrical control switch, an electromagnetic valve, a cooling fan and a control button, and the industrial control box integrates the control of the cylinder action of the whole test system, the processing of the cylinder sensing signal, the collection, output, data operation, data analysis, identification and judgment and storage of the sound measurement signal.

9. The mute testing system of claim 1, wherein, The mute test box is further provided with a monitoring camera and a lighting lamp.

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