CN216559326U - Noise testing device - Google Patents
Noise testing device Download PDFInfo
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- CN216559326U CN216559326U CN202122678276.3U CN202122678276U CN216559326U CN 216559326 U CN216559326 U CN 216559326U CN 202122678276 U CN202122678276 U CN 202122678276U CN 216559326 U CN216559326 U CN 216559326U
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Abstract
The utility model relates to the technical field of product noise test, in particular to a noise test device for performing noise test on a product. The noise testing device comprises a box body (1), and a sound absorption board (13) and a microphone (21) which are arranged in the box body (1). In the noise test process, the sound-absorbing board (13) can greatly reduce the interference of external noise to the tested noise in the box body (1), so that the noise collected by the microphone (21) in the box body (1) is basically generated by a product to be tested, and the accuracy of the noise test of the product to be tested is improved.
Description
Technical Field
The utility model relates to the technical field of product noise test, in particular to a noise test device for performing noise test on a product.
Background
Many products, such as main inverters, auxiliary inverters, transformers, fans and the like, inevitably generate noise during operation, and before leaving the factory, it is usually necessary to detect whether the noise of such products is within an allowable range. Noise testing of products generally needs to be done at the factory, but environmental noise generated by the machines that are operating at the factory interferes with noise testing of products, thereby causing great difficulty in noise testing of products.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a noise testing apparatus for improving the accuracy of noise testing of a product.
In one embodiment of a noise testing apparatus provided by the present invention, the noise testing apparatus includes: the box body is provided with an inner cavity, an opening communicated with the inner cavity and an air outlet, and an air duct is formed between the air outlet and the inner cavity; sound-absorbing boards arranged on the inner peripheral wall of the box body and the peripheral wall of the air duct; a microphone disposed in the interior chamber proximate the opening via a base.
For example, the auxiliary inverter is taken as a product to be tested and is described as an example, the auxiliary inverter has an air cooling structure, when the auxiliary inverter works, the noise of the air outlet portion of the auxiliary inverter is the largest, the opening of the noise testing device can be abutted against the periphery of the air outlet portion of the product to be tested, or the product to be tested can be placed in a mounting box, and the opening of the noise testing device is abutted against the periphery of the air outlet portion of the mounting box. In the noise test process, the noise that the product that awaits measuring produced flows the inner chamber that gets into the box from noise testing arrangement's opening along with the wind that it blew off, then the noise that will await measuring the product production through the wind channel propagates to noise testing arrangement's air outlet, and the abatvoix can be very big reduces the interference of external noise to the noise tested in the box for the noise that the microphone in the box gathered all basically awaits measuring the product production, thereby has improved the accuracy of the noise test of the product that awaits measuring.
In a preferred embodiment of the noise testing apparatus provided in the above embodiment, the sound-absorbing plate is further provided on an end surface of the opening, or a part of the sound-absorbing plate provided on the inner peripheral wall of the case protrudes from the opening. So, noise testing arrangement's abatvoix can directly support and lean on the periphery at the air outlet of the product that awaits measuring, plays noise testing arrangement and the sealed syllable-dividing effect of the product contact position department that awaits measuring to the noise test's of external noise to the product that awaits measuring noise test's interference has further been reduced.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: and the plurality of sound-absorbing wedges are arranged on the inner bottom wall of the box body opposite to the opening, and the tips of the sound-absorbing wedges face the opening. So, the noise that the product that awaits measuring produced by the opening of noise testing arrangement get into the inner chamber of box and towards the in-process of the interior diapire propagation of box, sound absorption wedge can absorb it to a very big extent, has greatly reduced the noise and has returned the opening and just by the noise stack that the opening got into and the interference that causes the noise test through the interior diapire of box.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: a guide rail disposed in the interior cavity and extending in a plane parallel to the end face of the opening, the base being configured to move along the guide rail via a transmission mechanism. So, at the in-process of noise test, the microphone has enlarged the scope of noise data collection through moving along the guide rail for noise data collection's is more comprehensive, thereby has further improved the accuracy of the noise test to the product that awaits measuring.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes a rotating mechanism, where the rotating mechanism includes: the first motor is arranged on the base, and the rotating shaft of the first motor is vertical to the plane extending from the guide rail; the extension arm is connected to the rotating shaft and is perpendicular to the rotating shaft, and the other end of the extension arm is provided with the microphone.
So, at the in-process of noise test, when the microphone removed along the guide rail, first motor can also drive the microphone rotatory, has also further enlarged the scope of noise data collection for noise data collection's is more comprehensive, thereby has further improved the accuracy of the noise test to the product of awaiting measuring. It should be noted that, if the guide rail is not provided, the purpose of expanding the noise data acquisition range can be achieved only by the rotating mechanism.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: and the controller is connected with a power device configured on the transmission mechanism through a control line, and a signal line is connected between the controller and the microphone. Illustratively, the controller can control the work of the power device through a control line, and further control the moving process of the microphone along the guide rail; in addition, the controller also receives a noise signal collected by the microphone through a signal line.
In a preferred embodiment of the noise testing apparatus provided in the above embodiment, the transmission mechanism is any one of an engagement transmission mechanism, a screw transmission mechanism, and a belt transmission mechanism. For example, when the base moves along the guide rail through the meshing transmission mechanism, the base can be provided with a gear and the guide rail can be provided with a rack, so that the microphone can move along the guide rail when the gear rotates; for another example, when the base moves along the guide rail through the thread transmission mechanism, the base can be provided with a nut and a round hole parallel to the axis of the nut, the nut is connected with a screw rod in a threaded manner, the guide rail can be a polished rod in sliding fit with the round hole, and the microphone can be driven to move along the track when the screw rod rotates; for another example, when the base moves along the guide rail through the belt transmission mechanism, the base may be provided with a belt pulley and a wheel shaft connected through a belt, two ends of the wheel shaft are connected with rail wheels matched with the guide rail, and a power device configured to the transmission mechanism drives the rail wheels to move along the guide rail through driving the belt pulley, so as to achieve the purpose that the microphone moves along the rail.
In a preferred embodiment of the noise testing device provided in the above embodiment, the guide rail extends in a straight line, or the guide rail extends in a non-straight line in a curved manner. It should be noted that the microphone can move stably along the rail at a faster speed when the guide rail extends in a linear manner; when the guide rail is bent and extended in a non-linear mode, the range of noise data acquisition of the microphone is larger, and technicians can design the shape and the specification of the guide rail according to actual requirements.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: and the lifting mechanism is arranged to support the box body and drive the box body to move back to or towards the opening direction. It should be noted that, in the environment of a production workshop, a product to be tested such as an auxiliary frequency converter is usually mounted on the roof for testing, after the noise testing device is provided with the lifting mechanism, the box body of the noise testing device can be lifted to a testing position where the opening of the box body is just opposite to the product to be tested, then the noise testing is performed, and after the noise testing is completed, the position of the box body is lowered through the lifting mechanism.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: a plurality of casters provided below the cabinet; an auxiliary locking member which cooperates with at least one caster to lock the caster when one end of the auxiliary locking member acts on the caster. So, conveniently remove noise testing arrangement on the bottom surface. In addition, a plurality of casters may be provided at the lower portion of the elevating mechanism on the premise that the elevating mechanism is provided at the lower portion of the casing. Types of casters include movable casters, fixed casters, and movable casters with brakes. The caster with the auxiliary locking component is referred to as a caster with a brake. The movable caster wheel is also called a universal wheel, and the structure of the movable caster wheel allows 360-degree rotation; the fixed caster is also called a directional caster, and has no rotating structure and can not rotate. Typically, two casters are used in combination, such as two directional wheels on the front side and two universal wheels on the rear side adjacent the push handrail. Since the caster is already conventional, detailed description of the structure thereof will not be given.
Drawings
The foregoing and other features and advantages of the utility model will become more apparent to those skilled in the art to which the utility model relates upon consideration of the following detailed description of a preferred embodiment of the utility model with reference to the accompanying drawings, in which:
FIG. 1 is a cross-sectional view of a noise testing device in an embodiment of the present invention.
Fig. 2 is a top view of a noise testing device in an embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating a moving track of a microphone during operation of a noise testing apparatus according to an embodiment of the present invention.
Wherein the reference numbers are as follows:
1-box 11-inner chamber 12-opening
13-acoustic board 14-sound absorption wedge 15-air duct
2-guide rail 21-microphone 22-base
23-extension arm 24-rotating shaft 3-lifting mechanism
Moving track of S-microphone
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by referring to the following examples. Although the present embodiment describes the application of the noise test apparatus of the present embodiment by taking the auxiliary inverter as an example, the noise test apparatus of the present embodiment is not limited to be used for performing a noise test on the auxiliary inverter, and may be used for performing a noise test on an air-cooled product such as a main inverter and a transformer, or a fan.
In one embodiment of a noise test apparatus provided by the present invention, as shown in fig. 1 and 2, the noise test apparatus includes a case 1, and a sound-absorbing board 13 and a microphone 21 provided in the case 1. The box body 1 is provided with an inner cavity 11, an opening 12 communicated with the inner cavity 11 and an air outlet, and an air duct 15 is formed between the air outlet and the inner cavity 11; sound-absorbing panels 13 provided on the inner peripheral wall of the casing 1 and the peripheral wall of the air duct 15; a microphone 21, which is disposed in the interior cavity 11 and adjacent to the opening 12 by a base 22.
The material of the sound-absorbing plate 13 may be mineral wool, glass wool, wood wool, etc., and the sound-absorbing plate 13 may be a porous sound-absorbing plate made of organic fiber, inorganic foam, foamed plastic, etc. On the premise that the strength of the sound-absorbing plate 13 meets the requirement, the air duct 15 can also be directly formed by utilizing part of the sound-absorbing plate 13.
Here, the auxiliary inverter is taken as a test product to be tested, and this is taken as an example for explanation, the auxiliary inverter has an air cooling structure, when the auxiliary inverter works, the noise of the air outlet part is the largest, the opening 12 of the noise testing device can be abutted against the periphery of the air outlet part of the test product to be tested, or the test product to be tested can be placed in a mounting box, and the opening 12 of the noise testing device is abutted against the periphery of the air outlet part of the mounting box. In the noise test process, the noise that the product that awaits measuring produced gets into the inner chamber 11 of box 1 from the opening 12 of noise testing arrangement along with the wind current that it blew off, then the noise that will await measuring the product production through wind channel 15 propagates to the air outlet of noise testing arrangement, abatvoix 13 can be very big reduces the interference of external noise to the noise of being tested in the box 1 for the noise that microphone 21 in the box 1 gathered all basically is the product that awaits measuring produces, thereby the accuracy of the noise test of the product that awaits measuring has been improved.
In a preferred embodiment of the noise testing apparatus provided in the above embodiment, the sound-absorbing plate 13 is further provided on an end surface of the opening 12, or the sound-absorbing plate 13 provided on the inner peripheral wall of the casing 1 has a portion protruding out of the opening 12. Therefore, the sound-absorbing board 13 of the noise testing device can directly abut against the periphery of the air outlet 16 of the product to be tested, and the sealing and sound-insulating effect of the contact position of the noise testing device and the product to be tested is achieved, so that the interference of external noise on the noise test of the product to be tested is further reduced.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: a plurality of acoustic wedges, which are arranged on the inner bottom wall of the box 1 opposite to the opening 12, with the tips of the acoustic wedges facing the opening 12. Thus, when the noise generated by the product to be tested enters the inner cavity 11 of the box body 1 through the opening 12 of the noise testing device and propagates towards the inner bottom wall of the box body 1, the sound absorption wedge 14 can absorb the noise to a great extent, and the interference caused by the superposition of the noise returning to the opening 12 through the inner bottom wall of the box body 1 and the noise just entering from the opening 12 on the noise test is greatly reduced.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: a guide rail 2 which is arranged in the interior 11 and which extends in a plane parallel to the end face of the opening 12, the base 22 being arranged to be moved along the guide rail 2 by means of a transmission mechanism. So, at the in-process of noise test, microphone 21 has enlarged the scope of noise data collection through moving along guide rail 2 for noise data collection's is more comprehensive, thereby has further improved the accuracy of the noise test to the product that awaits measuring.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes a rotating mechanism, and the rotating mechanism includes: a first motor arranged on the base 22, and a rotating shaft 24 of the first motor is vertical to the plane extending from the guide rail 2; an extension arm 23 is connected to the rotating shaft 24, the extension arm 23 is perpendicular to the rotating shaft 24, and the other end of the extension arm 23 is provided with a microphone 21.
So, at the in-process of noise test, when microphone 21 removed along guide rail 2, first motor can also drive microphone 21 rotatory, has also further enlarged the scope of noise data acquisition for noise data acquisition's more comprehensive, thereby further improved the accuracy of the noise test to the product of awaiting measuring. Fig. 3 shows a moving trace S of the microphone during the noise test, and the moving trace of the microphone also has an S-shaped or sinusoidal waveform. It should be noted that, if the guide rail 2 is not provided, the purpose of expanding the range of noise data acquisition can be achieved only by the above-mentioned rotating mechanism.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: and a controller connected with the power device of the transmission mechanism through a control line, and a signal line connected between the controller and the microphone 21. Illustratively, the controller can control the operation of the power device through a control line, and thus control the moving process of the microphone 21 along the guide rail 2; in addition, the controller also receives a noise signal collected by the microphone 21 through a signal line.
In a preferred embodiment of the noise testing apparatus provided in the above embodiment, the transmission mechanism may be any one of an engagement transmission mechanism, a screw transmission mechanism, and a belt transmission mechanism. For example, when the base 22 moves along the guide rail 2 through the meshing transmission mechanism, the base 22 may be provided with a gear and the guide rail 2 may be provided with a rack, so that the microphone 21 can move along the guide rail 2 when the gear rotates; for another example, when the base 22 moves along the guide rail 2 through the screw transmission mechanism, the base 22 may be provided with a nut and a circular hole parallel to the axis of the nut, the nut is connected with a screw rod through a screw, and the guide rail 2 may be a polished rod slidably engaged with the circular hole, so that when the screw rod rotates, the microphone 21 may be driven to move along the guide rail 2; for another example, when the base 22 moves along the guide rail 2 through the belt transmission mechanism, the base 22 may be provided with a pulley and a wheel axle connected through a belt, two ends of the wheel axle are connected with a rail wheel matched with the guide rail 2, and the power device configured in the transmission mechanism drives the rail wheel to move along the rail through the driving pulley, so as to achieve the purpose that the microphone 21 moves along the rail.
In a preferred embodiment of the noise testing device provided in the above embodiment, the guide rail 2 extends in a straight line, or the guide rail 2 extends in a non-straight line in a curved manner. It should be noted that the microphone 21 can move stably along the rail at a faster speed when the rail 2 extends in a linear manner; when the guide rail 2 extends in a non-linear manner, the range of noise data collection of the microphone 21 is wider, and a technician can design the shape and specification of the guide rail 2 according to actual requirements.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: and the lifting mechanism 3 is arranged to support the box body 1, and the lifting mechanism 3 can drive the box body 1 to move back or towards the opening 12. It should be noted that, in the environment of a production workshop, a product to be tested such as an auxiliary frequency converter is usually mounted on the roof for testing, after the noise testing device is provided with the lifting mechanism 3, the box body 1 can be lifted to a testing position where the opening 12 of the box body is opposite to the product to be tested, then the noise test is performed, and after the noise test is completed, the position of the box body 1 is lowered by the lifting mechanism 3.
In a preferred implementation of the noise testing apparatus provided in the foregoing embodiment, the noise testing apparatus further includes: a plurality of casters provided below the cabinet 1; an auxiliary locking member which cooperates with at least one caster to lock the caster when one end of the auxiliary locking member acts on the caster. So, conveniently remove noise testing arrangement on the bottom surface. In addition, a plurality of casters may be provided below the elevating mechanism 3 on the premise that the elevating mechanism 3 is provided below the casing 1. Types of casters include movable casters, fixed casters, and movable casters with brakes. The caster with the auxiliary locking component is referred to as a caster with a brake. The movable caster wheel is also called a universal wheel, and the structure of the movable caster wheel allows 360-degree rotation; the fixed caster is also called a directional caster, and has no rotating structure and can not rotate. Typically, two casters are used in combination, such as two directional wheels on the front side and two universal wheels on the rear side adjacent the push handrail. Since the caster is already conventional, detailed description of the structure thereof will not be given.
The utility model relates to the technical field of product noise test, in particular to a noise test device for performing noise test on a product. The noise test apparatus includes a case 1, and a sound-absorbing board 13 and a microphone 21 provided in the case 1. In the noise testing process, the sound-absorbing board 13 can greatly reduce the interference of external noise to the tested noise in the box body 1, so that the noise collected by the microphone 21 in the box body 1 is basically generated by the product to be tested, and the accuracy of the noise test of the product to be tested is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A noise testing device, comprising:
the air conditioner comprises a box body (1) and a fan, wherein the box body is provided with an inner cavity (11), an opening (12) communicated with the inner cavity (11) of the box body and an air outlet, and an air duct (15) is formed between the air outlet and the inner cavity (11);
sound-absorbing panels (13) provided on the inner peripheral wall of the box (1) and the peripheral wall of the air duct (15);
a microphone (21) disposed in the interior chamber (11) and proximate to the opening (12) by a base (22).
2. The noise testing device according to claim 1, characterized in that the sound-absorbing panel (13) is further provided on an end surface of the opening (12), or the sound-absorbing panel (13) provided on an inner peripheral wall of the case (1) has a portion protruding out of the opening (12).
3. The noise testing apparatus of claim 1, further comprising:
a plurality of acoustic wedges (14) arranged on an inner bottom wall of the box (1) opposite to the opening (12), and the tips of the acoustic wedges (14) face the opening (12).
4. The noise testing apparatus of claim 1, further comprising:
-a guide rail (2) arranged in the inner cavity (11) and extending in a plane parallel to the end surface of the opening (12), the base (22) being arranged to be moved along the guide rail (2) by means of a transmission.
5. The noise testing device of claim 4, further comprising a rotation mechanism, the rotation mechanism comprising:
a first motor, which is arranged on the base (22) and the rotating shaft (24) of which is vertical to the plane extending by the guide rail (2);
and the extension arm (23) is connected to the rotating shaft (24) and is vertical to the rotating shaft (24), and the other end of the extension arm is provided with the microphone (21).
6. The noise testing apparatus of claim 4, further comprising:
and the controller is connected with a power device configured on the transmission mechanism through a control line, and a signal line is connected between the controller and the microphone.
7. The noise testing device of claim 4, wherein the transmission mechanism is any one of a meshing transmission mechanism, a screw transmission mechanism, and a belt transmission mechanism.
8. The noise testing device according to claim 4, characterized in that the guide rail (2) extends in a non-linear manner in a curved manner.
9. The noise testing apparatus of claim 1, further comprising:
a lifting mechanism (3) which is arranged to support the box body (1) and drive the box body (1) to move back or towards the opening (12).
10. The noise testing apparatus of claim 1, further comprising:
a plurality of casters provided below the box (1);
an auxiliary locking member which cooperates with at least one of said casters to lock said caster when one end thereof acts on said caster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122678276.3U CN216559326U (en) | 2021-11-04 | 2021-11-04 | Noise testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122678276.3U CN216559326U (en) | 2021-11-04 | 2021-11-04 | Noise testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216559326U true CN216559326U (en) | 2022-05-17 |
Family
ID=81569407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122678276.3U Active CN216559326U (en) | 2021-11-04 | 2021-11-04 | Noise testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216559326U (en) |
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2021
- 2021-11-04 CN CN202122678276.3U patent/CN216559326U/en active Active
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