WO2018196150A1 - Dispositif et procédé de détection de fuite d'air de lecteur acoustique, et support de stockage lisible par ordinateur - Google Patents

Dispositif et procédé de détection de fuite d'air de lecteur acoustique, et support de stockage lisible par ordinateur Download PDF

Info

Publication number
WO2018196150A1
WO2018196150A1 PCT/CN2017/090094 CN2017090094W WO2018196150A1 WO 2018196150 A1 WO2018196150 A1 WO 2018196150A1 CN 2017090094 W CN2017090094 W CN 2017090094W WO 2018196150 A1 WO2018196150 A1 WO 2018196150A1
Authority
WO
WIPO (PCT)
Prior art keywords
speaker
diaphragm
air pressure
distance
box
Prior art date
Application number
PCT/CN2017/090094
Other languages
English (en)
Chinese (zh)
Inventor
彭明炜
李平
Original Assignee
歌尔丹拿音响有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 歌尔丹拿音响有限公司 filed Critical 歌尔丹拿音响有限公司
Publication of WO2018196150A1 publication Critical patent/WO2018196150A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements

Definitions

  • 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.
  • 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.
  • a speaker leakage detecting device 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.
  • the speaker air leakage detecting device further includes a barometer; the barometer is configured to detect air pressure in the sealed test box.
  • the range finder is a laser range finder.
  • 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.
  • 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.
  • a speaker leakage detecting method comprising the steps of:
  • the air leakage of the speaker is analyzed according to the displacement of the diaphragm of the speaker at different air pressures.
  • 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.
  • 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.
  • the steps are repeated three times N times, N ⁇ 2.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 is used to test the cavity 212.
  • 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.
  • the test computer 3 is used to control the operation of the air pressure adjusting device 13.
  • 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.
  • 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.
  • FIG. 1 a specific example will be given to illustrate the process of testing the speaker using the speaker leakage detecting device of FIG. 1:
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • the displacement data and the air pressure data obtained in the second step to the fifth step can be used 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. .
  • a method for detecting air leakage of a speaker includes the following steps:
  • 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.
  • 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:
  • Step 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.
  • step 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.
  • test plan can be simplified, the test time can be controlled within a few minutes, and the test efficiency is high.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the program code includes instructions for executing the method described in the foregoing method embodiment.
  • the specific implementation refer to the method embodiment. , will not repeat them here.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative
  • the division of the unit is only a logical function division, and the actual implementation may have another division manner.
  • multiple units or components may be combined or integrated into another system, or some features. Can be ignored or not executed.
  • 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.
  • 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.
  • 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. .

Abstract

L'invention concerne un dispositif et un procédé de détection de fuite d'air de lecteur acoustique, et un support de stockage lisible par ordinateur. Le dispositif de détection de fuite d'air de lecteur acoustique comprend une boîte de test étanche (1) et un dispositif de réglage de pression d'air (13). Le dispositif de réglage de pression d'air (13) est utilisé pour ajuster la pression d'air à l'intérieur de la boîte de test étanche (1). Un dispositif de fixation de lecteur acoustique (11) et au moins un compteur de distance (121, 122, 123) sont disposés à l'intérieur de la boîte de test étanche (1), le dispositif de fixation de boîte acoustique (11) étant utilisé pour fixer un lecteur acoustique (2) à détecter, et le compteur de distance (121, 122, 123) est utilisé pour mesurer la distance entre une membrane (211, 221, 231) du lecteur acoustique et le compteur de distance (121, 122, 123). Le dispositif et le procédé de détection de fuite d'air de lecteur acoustique peuvent être appliqués à divers types de produits de lecteur acoustique.
PCT/CN2017/090094 2017-04-27 2017-06-26 Dispositif et procédé de détection de fuite d'air de lecteur acoustique, et support de stockage lisible par ordinateur WO2018196150A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710289511.3A CN107135456B (zh) 2017-04-27 2017-04-27 音箱漏气检测装置和方法、计算机可读存储介质
CN201710289511.3 2017-04-27

Publications (1)

Publication Number Publication Date
WO2018196150A1 true WO2018196150A1 (fr) 2018-11-01

Family

ID=59715445

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/090094 WO2018196150A1 (fr) 2017-04-27 2017-06-26 Dispositif et procédé de détection de fuite d'air de lecteur acoustique, et support de stockage lisible par ordinateur

Country Status (2)

Country Link
CN (1) CN107135456B (fr)
WO (1) WO2018196150A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108683982B (zh) * 2018-05-21 2021-06-18 歌尔股份有限公司 一种音箱性能测试方法、系统及音箱共振性测试方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101068446A (zh) * 2007-06-04 2007-11-07 国光电器股份有限公司 扬声器的漏气检验方法及其检验装置
US7570769B2 (en) * 2004-04-23 2009-08-04 Motorola, Inc. Air leak self-diagnosis for a communication device
CN103888884A (zh) * 2014-04-03 2014-06-25 联想(北京)有限公司 一种喇叭检测方法及装置
CN105208502A (zh) * 2014-06-26 2015-12-30 致伸科技股份有限公司 扬声器半成品漏气测试系统及方法
CN105228073A (zh) * 2014-06-26 2016-01-06 致伸科技股份有限公司 开放式扬声器漏气测试系统及方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1601547A (en) * 1977-05-30 1981-10-28 Yokogawa Electric Works Ltd Force detector
US4974117A (en) * 1990-01-31 1990-11-27 Kavlico Corporation Dual diaphragm capacitive differential pressure transducer
US8213632B2 (en) * 2006-02-01 2012-07-03 Sony Corporation Electroacoustic transducer and ear speaker device
EP2456229A1 (fr) * 2010-11-17 2012-05-23 Knowles Electronics Asia PTE. Ltd. Système de haut-parleur et procédé de contrôle
CN202748201U (zh) * 2012-08-09 2013-02-20 鸿绩工业有限公司 防漏测试装置
CN203037417U (zh) * 2012-12-21 2013-07-03 英普亿塑胶电子(苏州)有限公司 漏气测试装置
CN104122046A (zh) * 2013-04-27 2014-10-29 共青城赛龙通信技术有限责任公司 气密性测试装置及方法
CN104135706B (zh) * 2014-07-31 2017-11-03 歌尔股份有限公司 直压式气密检测设备
GB2532794A (en) * 2014-11-28 2016-06-01 Digital Audio S A Versatile electroacoustic diffuser-absorber
CN204439303U (zh) * 2014-12-04 2015-07-01 Tcl通力电子（惠州）有限公司 检漏设备
CN205793349U (zh) * 2016-06-20 2016-12-07 英普亿塑胶电子(苏州)有限公司 测漏装置
CN106507262B (zh) * 2016-12-27 2022-06-28 深圳精拓创新科技有限公司 一种带有受控激励源的扬声器振膜测试仪

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7570769B2 (en) * 2004-04-23 2009-08-04 Motorola, Inc. Air leak self-diagnosis for a communication device
CN101068446A (zh) * 2007-06-04 2007-11-07 国光电器股份有限公司 扬声器的漏气检验方法及其检验装置
CN103888884A (zh) * 2014-04-03 2014-06-25 联想(北京)有限公司 一种喇叭检测方法及装置
CN105208502A (zh) * 2014-06-26 2015-12-30 致伸科技股份有限公司 扬声器半成品漏气测试系统及方法
CN105228073A (zh) * 2014-06-26 2016-01-06 致伸科技股份有限公司 开放式扬声器漏气测试系统及方法

Also Published As

Publication number Publication date
CN107135456A (zh) 2017-09-05
CN107135456B (zh) 2020-12-08

Similar Documents

Publication Publication Date Title
CN102538944B (zh) 基于位移反馈型振动台的次声发生装置
US8825423B1 (en) Calibration verification
CA2669651A1 (fr) Outil d'etalonnage pour systeme de mesure non lineaire
US20070108671A1 (en) Apparatus and method for in-situ calibration of vacuum gauge by absolute method and comparison method
CN106105264A (zh) 用于机电电容式传感器的集成自测试
CN109238686A (zh) 安全阀检测装置及安全阀检测方法
CN105004480B (zh) 一种真空计快速动态真空校准方法
Vincent et al. Acoustic transfer admittance of cylindrical cavities in infrasonic frequency range
WO2018196150A1 (fr) Dispositif et procédé de détection de fuite d'air de lecteur acoustique, et support de stockage lisible par ordinateur
CN207007487U (zh) 检测安全阀的开启压力的安全阀检测装置
CN104729974B (zh) 一种考虑温度效应的气测孔隙度测量方法
CN105190272A (zh) 具有实时健康监测和补偿的压力传感器
Barham et al. The application of the NPL laser pistonphone to the international comparison of measurement microphones
CN202511871U (zh) 基于位移反馈型振动台的次声发生装置
Thakur et al. On long-term stability of an air piston gauge maintained at National Physical Laboratory, India
JP2010271231A (ja) 漏洩検査方法および漏洩検査装置
JP2013170978A (ja) 差圧／圧力複合センサの異常診断方法
CN107368629A (zh) 一种减压阀流固耦合振动参数识别方法
US20190360889A1 (en) Sealing Performance Test Method, Apparatus, and Storage Medium
US20150052969A1 (en) Calibrating a Device
Yang et al. Calibration of sound intensity instruments based on the double coupler technology
Garg Establishing a traceability chain for sound pressure and vibration amplitude measurements
JP2023529386A (ja) 感知機器の較正システム及び方法
US9693161B2 (en) Close-type speaker leak test system and method
CN204649350U (zh) 密封腔绝对压力测量装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17907486

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17907486

Country of ref document: EP

Kind code of ref document: A1