A sound pressure detection device and related methods

Abstract

The embodiment of the present application discloses a sound pressure detection device and a related method thereof, wherein the sound pressure detection device comprises a mounting table, a spherical crown-shaped support, a mobile testing device and a controller; the mounting table is arranged in the spherical interior of the spherical crown-shaped support and is used for mounting a product to be tested; a spherical track is arranged on the spherical crown-shaped support; the mobile testing device is movably arranged on the spherical track, and the mobile testing device comprises a moving mechanism and a sound pressure measuring instrument arranged on the moving mechanism; and the controller is used for controlling the moving mechanism to move the sound pressure measuring instrument to a preset test point and controlling the sound pressure measuring instrument to collect sound pressure data of the test point. The method of the present application can perform three-dimensional measurement on the noise of the product to be tested, can form comprehensive stereo sound field collection, can meet the test requirements under various working conditions, and can improve the test efficiency and accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic detection, in particular to a sound pressure detection device and a related method. BACKGROUND

[0002] Electronic devices generate noise when working, and the noise is too large to cause bad experience for users. Therefore, in the process of developing electronic devices, the noise of the electronic devices needs to be detected to know whether the noise of the electronic devices meets the relevant standards. At present, the common test method is that a test personnel holds a sound level meter to measure at a specified position of a product to be tested and records data. On the one hand, due to the too small distance between the measuring personnel and the test point, the human body will produce uncontrollable effects such as absorption or emission on the sound near the test point, resulting in low detection accuracy. On the other hand, the measuring conditions are many, and the artificial needs to collect sound pressure data at different positions many times, and reads and records manually, which is easy to make mistakes. An improved way is to use a support to replace the hand to fix the device to be tested, but when the measuring conditions are many, the installation and debugging are more troublesome and inconvenient to verify. SUMMARY

[0003] Embodiments of the present application aim to provide a sound pressure detection device and a related method to solve the problems of single sound pressure detection method, troublesome installation and debugging, low detection accuracy and inability to meet the test requirements under various conditions in the prior art.

[0004] To solve the above technical problems, embodiments of the present application provide the following technical solutions:

[0005] According to an aspect of the present application, a sound pressure detection device is provided, which includes a mounting table, a spherical crown-shaped support, a mobile test device and a controller. The mounting table is arranged in the spherical interior of the spherical crown-shaped support and is used for mounting a product to be tested. The spherical crown-shaped support is provided with a spherical track. The mobile test device is movably arranged on the spherical track and includes a moving mechanism and a sound pressure measuring instrument arranged on the moving mechanism. The controller is used for controlling the moving mechanism to move the sound pressure measuring instrument to a preset test point and controlling the sound pressure measuring instrument to collect sound pressure data of the test point.

[0006] Optionally, the spherical crown-shaped support is provided with at least two intersecting spherical tracks, and each of the spherical tracks is correspondingly provided with a mobile test device.

[0007] Optionally, the at least two spherical tracks are arranged at equal angles.

[0008] Optionally, the moving mechanism comprises a moving platform, a driving motor and a gear, the driving motor and the gear are both mounted on the moving platform, the spherical track comprises at least two slide rails arranged at intervals, the slide rails are provided with track grooves on the side facing the outside of the sphere and are provided with annular track teeth on the side facing the inside of the sphere, the bottom of the moving platform is provided with track wheels matched with the track grooves, the mounting position of the gear corresponds to the position of the annular track teeth, and the driving motor is used to drive the gear to move on the annular track teeth.

[0009] Optionally, the moving mechanism further comprises an adjusting assembly, one end of the adjusting assembly is mounted with the sound pressure measuring instrument, and the other end of the adjusting assembly is mounted on the moving platform in a matched mode to adjust the distance between the sound pressure measuring instrument and the product to be measured.

[0010] Optionally, the adjusting assembly comprises a lead screw motor and a lead screw shaft, one end of the lead screw shaft is mounted with the sound pressure measuring instrument and extends into the inside of the spherical crown-shaped support, the other end of the lead screw shaft is located outside the spherical crown-shaped support, and the lead screw motor is used to drive the lead screw shaft to move close to or away from the product to be measured.

[0011] Optionally, the center of the sphere of the spherical crown-shaped support coincides with the sound source center or the geometric center of the product to be measured.

[0012] Optionally, the device further comprises a base, the mounting table is arranged on the base, the base is made of a hard reflective material, and / or the surface of the base is in a grid shape.

[0013] Optionally, the position where the mounting table contacts the base is provided with an interference isolation assembly.

[0014] According to another aspect of the present application, a sound pressure detection method is provided, which is applied to the sound pressure detection device and comprises the following steps:

[0015] mounting the product to be measured on the mounting table of the sound pressure detection device and starting the product to be measured;

[0016] obtaining the position information of the test point preset for the product to be measured,

[0017] controlling the moving mechanism of the sound pressure detection device to move the sound pressure measuring instrument of the sound pressure detection device to the test point;

[0018] controlling the sound pressure measuring instrument to collect the sound pressure data at the test point.

[0019] The beneficial effect of the embodiment of the present application is that, different from the prior art, the embodiment of the present application provides a sound pressure detection device, which comprises a spherical crown-shaped support, a mounting table, a mobile testing device and a controller, wherein the mounting table is arranged in the spherical interior of the spherical crown-shaped support and is used for mounting a product to be detected; a spherical track is arranged on the spherical crown-shaped support, and the mobile testing device is movably arranged on the spherical track and comprises a moving mechanism and a sound pressure measuring instrument arranged on the moving mechanism; and the moving mechanism moves the sound pressure measuring instrument to a preset test point under the control of the controller and then collects sound pressure data. The device of the present application can avoid the inconvenience of manual operation and the adverse effects of human body on the test, and improves the test efficiency and accuracy. In addition, the device of the present application adopts the spherical measurement method required by the national standard, performs three-dimensional measurement on the noise of the product to be detected, can form comprehensive stereo sound field collection, and thus meets the test requirements under various working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0020] One or more embodiments are illustrated by way of example in the drawings in which like reference numerals indicate like elements, and in which: the drawings are not necessarily to scale, unless otherwise specifically noted.

[0021] Figure 1 is a stereo structure diagram of a sound pressure detection device provided by the embodiment of the present application;

[0022] Figure 2 is a structure diagram of a moving mechanism provided by the embodiment of the present application;

[0023] Figure 3 is a schematic diagram of the mobile testing device provided by the embodiment of the present application and installed on the spherical track;

[0024] Figure 4 is a structure diagram of a mounting table provided by the embodiment of the present application;

[0025] Figure 5 is a schematic diagram of the top intersection of two spherical tracks provided by the embodiment of the present application;

[0026] Figure 6 is a flowchart of a sound pressure detection method provided by the embodiment of the present application.

[0027] The reference signs are as follows:

[0028] 1 - mounting table; 11 - mounting platform; 12 - fixed support; 13 - interference isolation assembly;

[0029] 2 - spherical crown-shaped support; 21 - spherical track; 22 - support; 211 - track groove; 212 - annular track tooth;

[0030] 3 - moving test device; 31 - moving mechanism; 32 - sound pressure measuring instrument; 311 - moving platform; 312 - driving motor; 313 - gear; 314 - track wheel; 315 - synchronous belt; 316 - screw motor; 317 - screw shaft; 318 - speed reducer;

[0031] 4 - controller;

[0032] 5 - product to be tested;

[0033] 6 - base DETAILED DESCRIPTION

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] In addition, the technical features involved in each of the embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0036] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0037] The embodiments of the present application provide a sound pressure detection device for detecting the sound pressure of various electronic devices that need to be tested for noise, such as HUD (Head Up Display), automobile rearview mirror, projector, etc. The present application combines the spherical measurement method published in the method reference standard (GB / T6882-2016 / ISO3745:2012) of acoustics research, and proposes a spherical crown-shaped sound pressure detection device. When the product to be tested is tested by using the sound pressure detection device, each test point in the above standard can be covered.

[0038] Before the sound pressure detection of the product to be tested, the test environment of the anechoic chamber needs to be configured according to the standard. The test environment includes the reference characteristic air sound impedance, air temperature, air pressure, relative humidity, background environmental noise and the like. In the embodiment of the present application, the sound pressure detection is taken as an example of the HUD product. When the sound pressure detection device provided by the present application is used to detect the sound pressure of the HUD product, the sound level difference between the background environmental noise and the noise source of the HUD product at all test points in each frequency band is 6dB or more, and the sound level difference for the 1 / 3 octave band with the center frequency from 250Hz-5000Hz is at least 10dB.

[0039] The sound pressure detection device of the present application is suitable for sound pressure test verification and durability sound pressure test in the product development process.

[0040] Embodiment one

[0041] Please refer to Figures 1-5 The sound pressure detection device provided by the embodiment of the present application comprises a mounting table 1, a spherical crown-shaped support 2, a mobile test device 3 and a controller 4. The mounting table 1 is arranged in the spherical interior of the spherical crown-shaped support 2 and is used to mount the product to be tested 5. The spherical crown-shaped support 2 is provided with a spherical track 21. The mobile test device 3 is movably mounted on the spherical track 21 and comprises a moving mechanism 31 and a sound pressure measuring instrument 32 mounted on the moving mechanism 31. The controller 4 is used to control the moving mechanism 31 to move the sound pressure measuring instrument 32 to the preset test point and control the sound pressure measuring instrument 32 to collect the sound pressure data of the test point.

[0042] Specifically, the mounting table 1 comprises a mounting platform 11 and a fixed support 12. The fixed support 12 is fixed to the mounting platform 11 by screws or other fastening components. The mounting platform 11 is made of sound-absorbing material and is provided with a plurality of small holes. The fixed support 12 is also made of sound-absorbing material and its structure is designed according to the shape and structure of the product to be tested 5, the type of sound source and the position of the sound source center, etc. As shown in the figure, the fixed support 12 is a pneumatic tool clamp which can quickly clamp the product to be tested 5 and improve the test efficiency. In the present application, the mounting table 1 is designed to be suitable for the test of mobile sound source and fixed sound source. In order to improve the accuracy of the sound pressure detection of the product to be tested, the mounting position of the product to be tested 5 on the fixed support 12 is designed to make the center of the spherical crown-shaped support 2 coincide with the sound source center or geometric center of the product to be tested 5. Figure 4

[0043] ​The sound pressure detection device can further comprise a base 6 made of a hard reflective material, such as stainless steel. Preferably, the surface of the base 6 is grid-shaped. The advantage of this design is that, on the one hand, the reflectivity of the measured sound waves can be reduced, and on the other hand, external interference sound waves can be absorbed. Generally, the base 6 is installed on the platform of the anechoic chamber, and the mounting table 1 is arranged on the base 6. In order to further isolate external noise interference, interference isolation components 13, such as soft elastic bodies, are arranged at the positions where the mounting table 1 contacts the base 6. In an example, the bottom of the mounting table 1 is provided with four interference isolation components 13.

[0044] The spherical crown-shaped support 2 is in the shape of a spherical crown with a hollow shape, and a spherical surface track 21 for the movement of the mobile test device 3 is arranged thereon. In an embodiment, the spherical crown-shaped support 2 further comprises a support 22, the inner surface of which is treated as a wedge made of sound-absorbing material. The spherical crown-shaped support 2 is installed on the platform of the anechoic chamber through the support 22. Preferably, the spherical center of the spherical crown-shaped support 2 coincides with the sound source center or geometric center of the product to be tested 5, and therefore, the spherical crown-shaped support 2 is slightly larger than a hemisphere in shape.

[0045] In an embodiment, at least two intersecting spherical surface tracks 21 are arranged on the spherical crown-shaped support 2, and each spherical surface track 21 is correspondingly provided with a mobile test device 3. Preferably, the spherical surface tracks are arranged at equal angles. As shown in the figure, two intersecting spherical surface tracks 21 are arranged on the spherical crown-shaped support 2, and the angle between the two spherical surface tracks 21 is 90°. It can be understood that the spherical surface tracks can also be arranged at non-equal angles as long as the testing needs are met. Figure 1

[0046] In order to enable the mobile test device 3 to move freely on the spherical surface track 21, the spherical surface track 21 comprises two spaced apart slide rails. The two slide rails are provided with track grooves 211 towards the outside of the sphere, and are provided with annular track teeth 212 towards the inside of the sphere. The two slide rails are hollowed out between them, so that the gear 313 (located on the mobile test device 3, described later) matched with the annular track teeth 212 can extend out of the hollow part.

[0047] The mobile test device 3 comprises a moving mechanism 31 and a sound pressure measuring instrument 32 installed on the moving mechanism 31. The moving mechanism 31 is used to drive the mobile test device 3 to move on the spherical surface track 21 under the control of the controller 4, and move the sound pressure measuring instrument 32 to the preset test point. The sound pressure measuring instrument 32 is a device for measuring sound pressure, such as a sound level meter.

[0048] ​Specifically, the moving mechanism 31 comprises a moving platform 311, a driving motor 312 and a gear 313. The bottom of the moving platform 311 is provided with a track wheel 314 matched with the track groove 211, the driving motor 312 and the gear 313 are both installed on the moving platform 311, and the installation position of the gear 313 corresponds to the position of the annular track tooth 212 of the spherical track 21. The driving motor 312, which can be a stepping motor, drives the gear 313 to move along the annular track tooth 212 under the control of the controller 4. When the gear 313 moves on the annular track tooth 212, the track wheel 314 is located in the track groove 211, and the gear 313 can be controlled to advance or retreat along the direction of the annular track tooth 212.

[0049] In an embodiment, the number of gears 313 is four, including two driving gears 313 and two driven gears 313. The moving mechanism 31 further comprises a speed reducer 318 for matching the driving motor 312, transmitting the rotating speed and torque to the driving gear 313, and enabling the driving gear 313 to move on the annular track tooth 212 and advance or retreat along the direction of the annular track tooth 212 under the control of the track wheel 314.

[0050] In order to enable each moving test device 3 to freely move at the intersection of the spherical tracks 21, each slide rail at the intersection is in a disconnected state, forming a hollow at the top of the spherical crown support 2, as shown in Figure 5 To prevent the moving test device 3 from being unable to cross the hollow at the top, the shafts of the driving gears 313 and the driven gears 313 are connected through a synchronous belt 315, so that the rotating speed and torque of the driving gear 313 can be transmitted to the driven gear 313, four-wheel driving is achieved, and it is ensured that the moving test device 3 can freely advance and retreat along the corresponding spherical track 21.

[0051] In an embodiment, the moving mechanism 31 further comprises an adjusting assembly, one end of which is installed with the sound pressure measuring instrument 32, and the other end is fitted to the moving platform 311 to realize the adjustment of the distance between the sound pressure measuring instrument 32 and the product to be tested 5. Specifically, the adjusting assembly comprises a lead screw motor 316 and a lead screw shaft 317, one end of the lead screw shaft 317 is installed with the sound pressure measuring instrument 32 and extends into the interior of the spherical crown support 2, and the other end is located outside the spherical crown support 2, and the lead screw motor 316 is used to drive the lead screw shaft 317 to approach or move away from the product to be tested 5. Generally, the lead screw shaft 317 is perpendicular to the moving platform 311 and performs lifting movement in a direction perpendicular to the moving platform 311 under the driving of the lead screw motor 316. When the lead screw shaft 317 approaches or moves away from the product to be tested under the driving of the lead screw motor 316, the sound pressure measuring instrument 32 can test each test point in the interior of the spherical crown support 2, and realize the data acquisition of the sound pressure measuring instrument 32 in the three-dimensional sphere in space.

[0052] It can be understood that the adjusting assembly further comprises other components, such as a mounting box, a sliding block, etc. By mounting these components on the moving platform 311 in cooperation with the lead screw motor 316 and the lead screw shaft 317, the driving control of the lead screw motor 316 on the lead screw shaft 317 is realized, which is a prior art and will not be described here.

[0053] The controller 4 controls the moving mechanism 31 to move the sound pressure measuring instrument 32 to the preset test point according to the position corresponding to the test point on the one hand, and controls the sound pressure measuring instrument 32 to collect the sound pressure data of the test point after the sound pressure measuring instrument 32 moves to the preset test point on the other hand. The controller 4 can be installed on the moving mechanism 31, or can be separately arranged. When arranged separately, the controller 4 can control the moving mechanism 31 and the sound pressure measuring instrument 32 through wireless communication (such as Bluetooth, wifi).

[0054] The following takes the example of two spherical tracks 21 being arranged vertically intersecting to illustrate how the controller 4 controls the moving mechanism 31 to move the sound pressure measuring instrument 32 to the preset test point according to the position corresponding to the test point. For the convenience of control, taking the acoustic center of the product to be measured (i.e. the center of the spherical crown support 2) as the origin, the projections of the two spherical tracks 21 on the horizontal plane are the X-axis and the Y-axis, and the direction perpendicular to the horizontal plane is the Z-axis to establish a coordinate system. In this coordinate system, the test points actually covered by the sound pressure measuring instrument 32 are located in the two hemispherical sections where the two spherical tracks 21 are located, wherein the X of each test point on one hemispherical section is 0, and the Y of each test point on the other hemispherical section is 0. Based on the symmetry of the sphere, the sound pressure information of each test point on the other hemispherical interface in the spherical crown support 2 can be obtained through the sound pressure information of the test points on the two hemispherical sections.

[0055] Specifically, the controller 4 acquires the current three-axis coordinates (X0, Y0, Z0) of the mobile platform 311, the initial relative distance R0 between the sound pressure measuring instrument 32 and the mobile platform 311, and the three-axis coordinates (X1, Y1, Z1) of the test point, determines the target three-axis coordinates (X2, Y2, Z2) of the mobile platform 311 and the target relative distance R1 between the sound pressure measuring instrument 32 and the mobile platform 311 according to the three-axis coordinates (X1, Y1, Z1) of the test point, and sends a first movement instruction to the driving motor 312 according to the current three-axis coordinates (X0, Y0, Z0) and the target three-axis coordinates (X2, Y2, Z2) of the mobile platform 311. The driving motor 312 moves the mobile platform 311 to the position on the spherical track 21 corresponding to the target three-axis coordinates (X2, Y2, Z2) according to the first movement instruction. After the mobile platform 311 is moved to the position on the spherical track 21 corresponding to the target three-axis coordinates (X2, Y2, Z2), the controller 4 generates a second movement instruction according to the initial relative distance R0 and the target relative distance R1 between the sound pressure measuring instrument 32 and the mobile platform 311, and sends the second movement instruction to the adjusting assembly (for example, the lead screw motor 316), so that the adjusting assembly adjusts the sound pressure measuring instrument 32 to a position with a distance R1 from the mobile platform 311 according to the second movement instruction. The above is the method of the controller 4 for controlling the single mobile test device 3 to move the sound pressure measuring instrument 32 to the test point. For multiple mobile test devices 3, the controller 4 can control each mobile test device 3 to move in turn, or control multiple mobile test devices 3 to move simultaneously.

[0056] It should be noted that the above control method is only used for illustration and is not limited. Those skilled in the art can make corresponding adjustments according to the actual setting of the spherical track 21, and refer to the above coordinate system setting method and control method. In addition, the controller 4 can also acquire the three-axis coordinates of the sound pressure measuring instrument 32, and obtain the three-axis coordinates of the mobile platform and the relative distance between the sound pressure measuring instrument 32 and the mobile platform 311 according to the three-axis coordinates of the sound pressure measuring instrument 32.

[0057] In summary, the controller 4 controls the mobile mechanism 31 to move the sound pressure measuring instrument 32 to the preset test point by automatically detecting the three-axis coordinates of the sound pressure measuring instrument 32 and / or the mobile platform 311 and the test point, captures the sound pressure data of each test point, and obtains the radiation distribution of the sound pressure. Further, the controller 4 can also calculate and analyze the sound quantification evaluation of the measured product according to the radiation distribution of the sound pressure, analyze the sound pressure optimization scheme of the measured product through the quantification evaluation, and realize the sound pressure test verification in the development process of the measured product.

[0058] The sound pressure detection device provided by the embodiment of the present application comprises a spherical crown-shaped support, a mounting table, a mobile testing device and a controller, wherein the mounting table is arranged in the spherical interior of the spherical crown-shaped support and is used for mounting a product to be tested; a spherical track is arranged on the spherical crown-shaped support, and the mobile testing device is movably arranged on the spherical track and comprises a moving mechanism and a sound pressure measuring instrument arranged on the moving mechanism; the moving mechanism moves the sound pressure measuring instrument to a preset testing point under the control of the controller and then collects sound pressure data. The device of the present application can avoid the inconvenience of manual operation and the adverse effects of human body on the test, and improves the test efficiency and accuracy. In addition, the device of the present application adopts the spherical measurement method required by the national standard, performs three-dimensional measurement on the noise of the product to be tested, can form a comprehensive stereo sound field collection, and thus meets the test requirements under various working conditions.

[0059] Embodiment two

[0060] The sound pressure detection method provided by the embodiment of the present application is shown in the flowchart of a sound pressure detection method provided by the embodiment of the present application, and the method is applied to the sound pressure detection device described in the embodiment one and specifically comprises the following steps. Figure 6

[0061] In step S601, a product to be tested is mounted on the mounting table of the sound pressure detection device, and the product to be tested is turned on.

[0062] In step S602, the position information of a testing point preset for the product to be tested is acquired.

[0063] The position information of the testing point is preset in the controller of the sound pressure detection device, and the current position information of each sound pressure measuring instrument is recorded.

[0064] In step S603, the moving mechanism of the sound pressure detection device is controlled to move the sound pressure measuring instrument of the sound pressure detection device to the testing point.

[0065] The controller of the sound pressure detection device calculates the target position of the moving platform and the target relative distance between the sound pressure measuring instrument and the moving platform according to the three-axis coordinates of the sound pressure measuring instrument, the moving platform of the sound pressure detection device and the testing point, generates a first moving instruction and a second moving instruction respectively, sends the first moving instruction to the driving motor so that the driving motor moves the moving platform to the target position according to the first moving instruction, and sends the second moving instruction to the adjusting assembly (for example, a lead screw motor) so that the adjusting assembly moves the sound pressure measuring instrument to the testing point according to the second moving instruction.

[0066] In step S604, the sound pressure measuring instrument is controlled to collect sound pressure data at the testing point.

[0067] ​In one embodiment, the sound pressure detection device can control the sound pressure measuring instrument to move to each preset test point through three-axis automatic detection of the position of the sound pressure measuring instrument and the position of the test point, capture sound pressure data of each test point, obtain the radiation distribution of the sound pressure, and calculate and analyze the sound quantification evaluation of the measured product according to the radiation distribution of the sound pressure, so as to analyze the sound pressure optimization scheme of the measured product through the quantification evaluation, and realize the sound pressure test verification in the development process of the measured product.

[0068] The above method is applied to the sound pressure detection device described in Embodiment One, and the technical details not described in detail in this embodiment can be referred to the sound pressure detection device provided in Embodiment One of the present application.

[0069] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a general hardware platform, and of course, it can also be realized by hardware. Based on such understanding, the above technical solutions or the part that contributes to the related art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in each embodiment or some part of the embodiment.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be brief, they are not provided in details; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sound pressure detection device, characterized in that, The device includes a mounting platform, a spherical bracket, a mobile testing device, and a controller. The mounting platform is located inside the spherical shape of the spherical bracket and is used to mount the product to be tested. A spherical track is provided on the spherical bracket. The mobile testing device is movably mounted on the spherical track and includes a moving mechanism and a sound pressure level measuring instrument mounted on the moving mechanism. The controller is used to control the moving mechanism to move the sound pressure level measuring instrument to a preset test point and to control the sound pressure level measuring instrument to collect sound pressure data at the test point. The moving mechanism includes a moving platform, a drive motor, and a gear. The drive motor and the gear are both mounted on the moving platform. The spherical track includes at least two slide rails spaced apart. The at least two slide rails have a track groove on the side facing outward from the sphere and an annular track tooth on the side facing inward from the sphere. The bottom of the moving platform is provided with a track wheel that matches the track groove. The mounting position of the gear corresponds to the position of the annular track tooth. The drive motor is used to drive the gear to move on the annular track tooth. The moving mechanism also includes an adjustment component, one end of which is mounted on the sound pressure measuring instrument, and the other end of which is mounted on the moving platform to adjust the distance between the sound pressure measuring instrument and the product under test. The adjustment assembly includes a lead screw motor and a lead screw shaft. One end of the lead screw shaft is equipped with the sound pressure measuring instrument and extends into the interior of the spherical crown bracket. The other end of the lead screw shaft is located outside the spherical crown bracket. The lead screw motor is used to drive the lead screw shaft to move closer to or away from the product to be tested. The center of the spherical crown-shaped support coincides with the sound source center or geometric center of the product under test.

2. The device according to claim 1, characterized in that, The spherical support is provided with at least two intersecting spherical tracks, and a corresponding mobile testing device is installed on each of the spherical tracks.

3. The device according to claim 2, characterized in that, The at least two spherical tracks are set at equal angles.

4. The device according to claim 1, characterized in that, The device also includes a base, the mounting platform is disposed on the base, the base is made of a hard reflective material, and / or the surface of the base is grid-like.

5. The device according to claim 4, characterized in that, An interference isolation component is provided at the position where the mounting platform contacts the base.

6. A method for detecting sound pressure levels, characterized in that, The method is applied to the sound pressure detection device according to any one of claims 1 to 5, comprising: Install the product under test on the mounting platform of the sound pressure testing equipment and turn on the product under test; Obtain the location information of the test points preset for the product under test. The moving mechanism of the sound pressure detection device is controlled to move the sound pressure measuring instrument of the sound pressure detection device to the test point; The sound pressure measuring instrument is controlled to collect sound pressure data at the test point.

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