WO2018196150A1

WO2018196150A1 - Sound box air leakage detection device and method, and computer-readable storage medium

Info

Publication number: WO2018196150A1
Application number: PCT/CN2017/090094
Authority: WO
Inventors: 彭明炜; 李平
Original assignee: 歌尔丹拿音响有限公司
Priority date: 2017-04-27
Filing date: 2017-06-26
Publication date: 2018-11-01
Also published as: CN107135456B; CN107135456A

Abstract

Disclosed are a sound box air leakage detection device and method, and a computer-readable storage medium. The sound box air leakage detection device comprises a sealed test box (1) and an air pressure adjusting device (13). The air pressure adjusting device (13) is used for adjusting air pressure inside the sealed test box (1). A sound box fixing device (11) and at least one distance meter (121, 122, 123) are arranged inside the sealed test box (1), wherein the sound box fixing device (11) is used for fixing a sound box (2) to be detected, and the distance meter (121, 122, 123) is used for measuring the distance between a diaphragm (211, 221, 231) of the sound box and the distance meter (121, 122, 123). The sound box air leakage detection device and method can be applied to various types of sound box products.

Description

Speaker leakage detecting device and method, computer readable storage medium

Technical field

The present invention relates to the field of acoustics, and more particularly to a speaker air leak detecting device, a speaker air leak detecting method, and a computer readable storage medium.

Background technique

Leakage of the speaker cavity can cause deterioration of the performance of the speaker. Before the speaker leaves the factory, the manufacturer will check whether the sealing of the speaker cavity is qualified. In the prior art, there are mainly two test methods:

The first method is to pressurize the cavity of the speaker body and detect the internal pressure of the speaker cavity. If the internal pressure of the speaker cavity tends to be stable in a short time, the speaker cavity has a gas leakage phenomenon, and the sealing property is unqualified. . The limitation of this method is that it is only suitable for the inverted speaker, and the inverted phase hole of the inverted speaker can be used as the air inlet hole to pressurize the speaker cavity, which is not suitable for the fully enclosed speaker.

The second method detects the tightness of the speaker cavity by testing the acoustic performance of the speaker. The limitation of this test method is that if the speaker is only slightly leaky, it may not be detected, so it is not suitable for speaker products that require particularly high sealing performance, such as not suitable for waterproofing.

Summary of the invention

It is an object of the present invention to provide a test solution for speaker leakage that has broader applicability.

According to a first aspect of the present invention, a speaker leakage detecting device is provided, comprising a sealed test box and a gas pressure adjusting device;

The air pressure adjusting device is configured to adjust air pressure in the sealed test box;

The sealed test box is provided with a speaker fixing device and at least one range finder;

The speaker fixing device is configured to fix the speaker to be tested;

The range finder is configured to measure a distance between a diaphragm of the speaker and a range finder.

Optionally, the speaker air leakage detecting device further includes a barometer; the barometer is configured to detect air pressure in the sealed test box.

Optionally, the range finder is a laser range finder.

Optionally, the speaker air leakage detecting device further includes a gas leakage analyzing device; the air leakage analyzing device is configured to acquire distance data from the distance measuring device, and obtain air pressure data from the air pressure gauge; according to the distance The data calculates the displacement of the diaphragm of the speaker, and analyzes the displacement of the diaphragm of the speaker at different air pressures to determine the air leakage of the speaker.

According to a second aspect of the present invention, a speaker leakage detecting method is provided, comprising the steps of:

Adjusting the air pressure in the sealed test box, and measuring the displacement of the diaphragm of the speaker in the sealed test box under different air pressures;

The air leakage of the speaker is analyzed according to the displacement of the diaphragm of the speaker at different air pressures.

Optionally, the measuring the displacement of the diaphragm of the sound box under different air pressures is to calculate the change of the distance at different pressures by measuring the distance between the diaphragm of the sound box and the set position in the box. And get.

Optionally, the adjusting the air pressure in the sealed test box, measuring the displacement of the diaphragm of the sound box under different air pressures, including:

Step 1: first measuring the distance of the diaphragm of the speaker to the set position in the box as the initial distance;

Step two: adjusting the air pressure in the sealed test box to the target air pressure, and measuring the distance of the diaphragm of the sound box to the set position at the target air pressure;

Step three: lowering the air pressure in the sealed test box, and measuring the distance of the diaphragm of the speaker to the set position under the current air pressure;

Step 4: Calculate the difference between the distance measured in

steps

2 and 3 and the initial distance to obtain the displacement of the diaphragm under different air pressures.

Optionally, the steps are repeated three times N times, N≥2.

According to a third aspect of the invention, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method according to any of the preceding claims.

The speaker leakage detecting device and method provided by the invention can be applied to different types of speaker products. Optionally, the speaker leakage detecting device and method provided by the invention can be used for simultaneously detecting the sealing performance of a plurality of cavities of the speaker.

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is understood that the following drawings are merely illustrative of certain embodiments of the invention and are not intended to Other relevant figures may also be obtained from those of ordinary skill in the art in light of the inventive work.

FIG. 1 is a schematic structural diagram of a speaker air leakage detecting device according to an embodiment of the present invention.

FIG. 2 is a schematic flow chart of a method for detecting air leakage of a speaker according to an embodiment of the present invention.

FIG. 3 is a schematic flow chart of a method for detecting air leakage of a speaker according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a hardware configuration of a gas leakage analyzing device according to an embodiment of the present invention.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus should be considered as part of the specification, where appropriate.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

Referring to FIG. 1 , a speaker leakage detecting device provided by an embodiment of the present invention includes a sealed test box 1 and a gas pressure adjusting device 13 .

The air pressure adjusting device 13 is connected to the sealed test box 1, and the air pressure in the box of the sealed test box 1 can be adjusted by the air pressure adjusting device 13. The air pressure adjusting device 13 can be, for example, a gas pressure regulating valve.

The speaker fixing device 11 and the

range finder

121, 122, 123 are disposed in the sealed test box 1.

As can be seen from FIG. 1, the speaker 2 to be tested has a bass chamber 212 in the middle, a mid-range cavity 222 on the left side of the bass chamber 212, and a mid-range cavity 232 on the right side of the bass chamber 212. The cavity 222 and the cavity 232 are completely sealed, the cavity 212 corresponds to the diaphragm 211, the cavity 222 corresponds to the diaphragm 221, the cavity 232 corresponds to the diaphragm 231, and the speaker 1 has a connection with the bass chamber 212. Inverted hole 21.

The speaker fixing device 11 fixes the speaker 2 inside the sealed test box 1. The speaker fixture 11 can be, for example, a speaker fixture.

The three

range finder

121, 122, 123 are respectively aligned with the diaphragm 211, the diaphragm 221, and the diaphragm 231 of the speaker 1. The range finder can be, for example, a laser range finder, an infrared range finder, an ultrasonic range finder, or the like.

The speaker leak detecting device further includes a barometer 14 for detecting the air pressure in the case of the sealed test box 1.

The speaker leak detecting device also includes a test computer 3. In one embodiment, the test computer 3 is used to control the operation of the air pressure adjusting device 13. In one embodiment, the test computer 3 acts as a leak analysis device, acquires distance data from the

range finder

121, 122, 123, obtains air pressure data from the barometer 14, calculates displacement of the diaphragm of the speaker according to the distance data, and analyzes the speaker. The displacement of the diaphragm under different air pressures to determine the air leakage of the speaker. In the embodiment of FIG. 1, the test computer 3 is connected to the air pressure adjusting device 13, the barometer 14, and the three range finder through the data collector and the control unit 15; the test computer 3 controls the air pressure through the data collector and the control unit 15. The adjusting device 13 adjusts the pressure in the tank, reads the air pressure data from the barometer 14 through the data collector and the control unit 15, and reads the distance data from the three distance meters through the data collector and the control unit 15.

Taking FIG. 1 as an example, a specific example will be given to illustrate the process of testing the speaker using the speaker leakage detecting device of FIG. 1:

In the first step, the speaker 2 to be tested is placed in the sealed test box 1 and the speaker fixing device 11 is utilized. The speaker 2 is fixed on the box body, and the phase-in hole 21 of the speaker 2 is closed by the sealing plug, so that the cavity 212 of the speaker 2 is also in a sealed state, and then the box door of the sealed test box 1 is closed.

In the second step, the range of the diaphragm 221 to the range finder 121 is measured by the range finder 121, the distance between the diaphragm 211 and the range finder 122 is measured by the range finder 122, and the diaphragm 231 is measured by the range finder 123 to the distance measuring unit. The distance of the instrument 123, these three distances are the initial distance from the diaphragm to the rangefinder.

In the third step, the air pressure adjusting device 13 is controlled to increase the air pressure in the sealed test box 1 to the target air pressure by the test computer 3 input command. The distance from the diaphragm 221 to the range finder 121, the distance from the diaphragm 211 to the range finder 122, and the distance from the diaphragm 231 to the range finder 123 are measured by the

range finder

121, 123, 123, respectively. In this step, the test computer 3 obtains the pressure data in the sealed test box 1 from the barometer 14, so that the air pressure in the sealed test box 1 can be adjusted very accurately to the target air pressure.

In the fourth step, the test computer 3 gradually reduces the air pressure in the sealed test box 1 box, and simultaneously records the pressure data curve of the sealed test box 1 by using the barometer 14, and records the distances of the three diaphragms of the speaker 1 by using three range finder. Data curve.

In the fifth step, when the air pressure in the sealed test box 1 is lowered to a preset pressure, the air pressure adjusting device 13 is turned off, and the air pressure in the sealed test box 1 is kept at a preset pressure for a period of time, and the time is recorded. Distance data for the three diaphragms inside. Those skilled in the art can adjust the length of this time according to actual test needs.

In the sixth step, by using the distance data of the third step to the fifth step and the initial distance data of the diaphragm to the range finder, the displacement of the diaphragm of the speaker 2 under different air pressures can be calculated. According to the displacement of the diaphragm of the speaker 2 under different air pressures, the air leakage of the cavity of the speaker 2 can be analyzed.

The following is a brief description of the test principle of the embodiment of the present invention: when the speaker is initially placed in the sealed test box, the air pressure inside the speaker cavity and the air pressure in the cabinet are in a balanced state. If the cavity of the speaker is well sealed and there is no air leakage, the diaphragm will have a corresponding displacement due to the pressure difference between the inside and the outside when the air pressure in the box increases. If the cavity of the speaker has only a slight air leak, when the air pressure in the box increases, the diaphragm will also have a certain displacement due to the pressure difference between the inside and the outside; however, due to the slight leak of the cavity, the internal and external pressure difference will be Gradually decreasing, the displacement of the diaphragm will gradually recover. If there is a serious air leak in the cavity of the speaker, when the air pressure in the box increases, the pressure difference between the inside and outside of the speaker cavity rapidly decreases to zero, and the diaphragm has no obvious displacement.

Those skilled in the art can use the displacement data and the air pressure data obtained in the second step to the fifth step to perform a relatively fine leak analysis on the three cavities of the speaker 1, and the present invention will not be repeated herein. If only a rough test of the air leakage of the speaker is required, the barometer can be omitted, the air pressure in the box can be roughly adjusted by the air pressure adjusting device, the displacement of the diaphragm before and after the air pressure adjustment in the box can be measured, and the speaker can be observed whether the air leaks. .

Referring to FIG. 2, a method for detecting air leakage of a speaker provided by an embodiment of the present invention includes the following steps:

102. Adjust the air pressure in the sealed test box, and measure the displacement of the diaphragm of the speaker in the sealed test box under different air pressures.

103. Analyze the air leakage of the speaker according to the displacement of the diaphragm of the speaker under different air pressures.

For step 102, the displacement of the diaphragm of the sound box under different air pressures is measured by measuring the distance between the diaphragm of the sound box and the set position in the box, and calculating the change of the distance under different air pressures. And get.

For step 102, Figure 3 shows an embodiment. Step 102: Adjusting the air pressure in the sealed test box, and measuring the displacement of the diaphragm of the speaker in the sealed test box under different air pressures may include the following steps:

1011. First measure the distance between the diaphragm of the speaker and the set position in the box as the initial distance.

1022. Adjust a gas pressure in the sealed test box to a target air pressure, and measure a distance of a diaphragm of the sound box to the set position at a target air pressure.

1023. Lower the air pressure in the sealed test box, and measure the distance of the diaphragm of the speaker to the set position under the current air pressure. Step 1023 can be repeated several times depending on the test needs.

1024. Calculate the difference between the distance measured by step 1022 and step 1023 and the initial distance to obtain the displacement of the diaphragm under different air pressures.

The main advantages of the test solution provided by the embodiment of the present invention are:

1. It can adapt to different types of speaker products. It is suitable for inverted speaker and fully enclosed speaker. It is suitable for detecting the speaker with high sealing requirements. It is suitable for detecting the leakage and waterproof performance of waterproof speaker products.

2. For speakers with different shapes and different cavity structures, just adjust the position of the range finder and the speaker fixture to test.

3. It can simultaneously detect the sealing performance of multiple chambers of the speaker.

4. Under the non-extra high sealing requirements, the test plan can be simplified, the test time can be controlled within a few minutes, and the test efficiency is high.

5, the cost is reasonable and acceptable, the current laser rangefinder probe price is not high, the accuracy can reach +/-1mm, the data collector and control unit can use a universal interface card, so the main cost of this solution lies in the sealed test box Cost, considering that it can be reused for multiple speaker products, the average cost is relatively low.

For those skilled in the art, the foregoing speaker leakage detecting method can be implemented by hardware, software, or a combination of software and hardware. The embodiment of the present invention further provides a computer readable storage medium having stored thereon computer instructions that, when executed by a processor, implement the steps of the method according to any of the preceding claims.

4 is a block diagram showing an example of a hardware configuration of a gas leakage analysis device that can be used to implement an embodiment of the present invention. The air leak analysis device 300 includes a processor 3010, a memory 3020, an interface device 3030, a communication device 3040, a display device 3050, an input device 3060, a speaker 3070, a microphone 3080, and the like.

The memory 3020 is configured to store instructions for controlling the processor 3010 to operate to perform the speaker leak detection method according to any of the preceding claims.

The processor 3010 can be, for example, a central processing unit CPU, a microprocessor MCU, or the like. The memory 3020 includes, for example, a ROM (Read Only Memory), a RAM (Random Access Memory), a nonvolatile memory such as a hard disk, and the like. The interface device 3030 includes, for example, a USB interface or the like, and the air leak analysis device 300 reads data from the barometer and the range finder using the interface 3030. The communication device 3040 can, for example, perform wired or wireless communication. The display device 3050 is, for example, a liquid crystal display, a touch display, or the like. The input device 3060 can include, for example, a touch screen, a keyboard, etc., for the user to input test instructions and adjust the test process. The user can input/output voice information through the speaker 3070 and the microphone 3080.

The gas leak analysis device 300 shown in Figure 4 is merely illustrative and is in no way intended to limit the invention, its application or use. Those skilled in the art will appreciate that although shown in FIG. A plurality of devices, however, the present invention may relate only to some of the devices therein. Those skilled in the art can design instructions in accordance with the disclosed embodiments of the present invention. The instructions for controlling the operation of the processor are well known in the art and will not be described in detail herein.

It should be noted that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the embodiments are referred to each other. can. However, it should be apparent to those skilled in the art that the above embodiments may be used alone or in combination with each other as needed. In addition, for the device embodiment, since it corresponds to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the corresponding part of the method embodiment. The system embodiments described above are merely illustrative, and the modules illustrated as separate components may or may not be physically separate.

In addition, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block of the flowchart or block diagram can represent a module, a program segment, or a portion of code that includes one or more of the Executable instructions. It should also be noted that in some alternative implementations, the functions noted in the blocks may also occur in a different order than that illustrated in the drawings. For example, two consecutive blocks may be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts, can be implemented in a dedicated hardware-based system that performs the specified function or function. Or it can be implemented by a combination of dedicated hardware and computer instructions.

The computer program product provided by the embodiment of the present invention includes a computer readable storage medium storing the program code, and the program code includes instructions for executing the method described in the foregoing method embodiment. For the specific implementation, refer to the method embodiment. , will not repeat them here.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The device embodiments described above are merely illustrative For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner. For example, multiple units or components may be combined or integrated into another system, or some features. Can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some communication interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply such entities or operations. There is any such actual relationship or order between them. Furthermore, the term "comprises" or "comprises" or "comprises" or any other variations thereof is intended to encompass a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. In the absence of more restrictions, elements defined by the phrase "including one..." are not excluded from the process, method, article, or device that includes the element. There are other identical elements.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention. It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in a drawing, it is not necessary to further define and explain it in the subsequent drawings.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope of the invention. The scope of the invention is defined by the appended claims.

Claims

A speaker leakage detecting device, comprising: a sealing test box and a gas pressure adjusting device;

The air pressure adjusting device is configured to adjust air pressure in the sealed test box;

The sealed test box is provided with a speaker fixing device and at least one range finder;

The speaker fixing device is configured to fix the speaker to be tested;

The range finder is configured to measure a distance between a diaphragm of the speaker and a range finder.
The device of claim 1 further comprising a barometer;

The barometer is configured to detect the air pressure in the sealed test box.
The apparatus according to claim 1 or 2, wherein said range finder is a laser range finder.
The device according to claim 2 or 3, further comprising a gas leakage analyzing device;

The air leakage analyzing device is configured to acquire distance data from the range finder, obtain air pressure data from the air pressure gauge, calculate a displacement of the diaphragm of the sound box according to the distance data, and analyze a diaphragm of the sound box. Displacement at different air pressures to determine the air leak of the speaker.
A speaker leakage detecting method is characterized in that it comprises the following steps:

Adjusting the air pressure in the sealed test box, and measuring the displacement of the diaphragm of the speaker in the sealed test box under different air pressures;

The air leakage of the speaker is analyzed according to the displacement of the diaphragm of the speaker at different air pressures.
The method according to claim 5, wherein said measuring the displacement of said diaphragm of said sound box at different air pressures is performed by measuring a distance from a diaphragm of said sound box to a set position in said box, Obtained by varying the distance at different pressures.
The method according to claim 5 or claim 6, wherein the adjusting the air pressure in the sealed test box and measuring the displacement of the diaphragm of the sound box under different air pressures comprises:

Step 1: first measuring the distance of the diaphragm of the speaker to the set position in the box as the initial distance;

Step 2: Adjust the air pressure in the sealed test box to the target air pressure, and measure at the target a distance from the diaphragm of the speaker to the set position under air pressure;

Step three: lowering the air pressure in the sealed test box, and measuring the distance of the diaphragm of the speaker to the set position under the current air pressure;

Step 4: Calculate the difference between the distance measured in steps 2 and 3 and the initial distance to obtain the displacement of the diaphragm under different air pressures.
The method according to claim 7, characterized in that the step is repeated three times N times, N ≥ 2.
A computer readable storage medium having stored thereon computer instructions, wherein the instructions are executed by a processor to perform the steps of the method of any of claims 5-8.