WO2016192379A1 - 同时验证电声转换装置振幅和温度参数的方法及系统 - Google Patents

同时验证电声转换装置振幅和温度参数的方法及系统 Download PDF

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WO2016192379A1
WO2016192379A1 PCT/CN2015/097755 CN2015097755W WO2016192379A1 WO 2016192379 A1 WO2016192379 A1 WO 2016192379A1 CN 2015097755 W CN2015097755 W CN 2015097755W WO 2016192379 A1 WO2016192379 A1 WO 2016192379A1
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Prior art keywords
gain
frequency
voice coil
temperature
amplitude
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PCT/CN2015/097755
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English (en)
French (fr)
Inventor
平慷
杨鑫峰
韦杰
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歌尔声学股份有限公司
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Application filed by 歌尔声学股份有限公司 filed Critical 歌尔声学股份有限公司
Priority to EP15894022.1A priority Critical patent/EP3253077B1/en
Priority to US15/553,414 priority patent/US10264377B2/en
Publication of WO2016192379A1 publication Critical patent/WO2016192379A1/zh

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
    • 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
    • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
    • H04R29/003—Monitoring arrangements; Testing arrangements for loudspeakers of the moving-coil type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers

Definitions

  • the present invention relates to a method and system for simultaneously verifying amplitude and temperature parameters of an electroacoustic transducing device, and a controller for simultaneously verifying amplitude and temperature parameters of the electroacoustic transducing device.
  • the intelligent power amplifier system has been rapidly popularized in the mobile phone field in recent years because of its dual functions of improving the sound quality of the electroacoustic conversion device and protecting the electroacoustic conversion device.
  • the intelligent power amplifier can instantly monitor the amplitude and voice coil temperature of the electro-acoustic converter and provide feedback to protect the electro-acoustic converter. This requires the manufacturer of electroacoustic transducers to provide accurate maximum amplitude parameters and voice coil maximum temperature parameters that break existing parameter definition methods and reliability verification methods. In order to cooperate with the intelligent power amplifier protection and improve the performance of the electroacoustic conversion device, it is necessary to verify the rationality of the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax.
  • the conventional verification method is to verify the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax, respectively.
  • a conventional frequency sweep signal generated by the frequency sweep signal generator 1 is amplified by the power amplifier unit 2 and then connected to the electro-acoustic conversion device, and the maximum amplitude is measured by the amplitude range finder 3 . , detecting whether the maximum amplitude corresponds to the maximum amplitude parameter Xmax to be verified. If not, increase or decrease the gain of the amplifier unit until the measured maximum amplitude meets Xmax. The performance of the electroacoustic transducer is tested after a predetermined time of continuous operation under the sweep signal and gain.
  • a scheme for verifying the maximum temperature parameter Tmax of the voice coil is shown.
  • the conventional frequency sweep signal generated by the frequency sweep signal generator 1 is amplified by the power amplifier unit 2 and then connected to the electroacoustic conversion device, and the voice coil is tested with the temperature detector 4.
  • the temperature detecting whether the voice coil temperature meets the voice coil maximum temperature parameter Tmax to be verified. If not, increase or decrease the gain of the power amplifier unit.
  • the measured voice coil temperature is in accordance with Tmax.
  • the performance of the electroacoustic transducer is tested after a predetermined time of continuous operation under the sweep signal and gain.
  • the amplitude and voice coil temperature affect the working state of the electroacoustic conversion device at the same time. Under the state of the largest amplitude and the highest voice coil temperature, the electroacoustic conversion device can still work normally. Such Xmax and Tmax are effective and reasonable. However, in the conventional verification method, the verification of the amplitude and the verification of the maximum temperature of the voice coil are separated, and the actual situation cannot be simulated.
  • a method of simultaneously verifying amplitude and temperature parameters of an electroacoustic transducing device comprising the steps of: S1, accessing a swept frequency signal to the electroacoustic transducing device; S2, adjusting said The gain of the full frequency band of the frequency sweep signal simultaneously tests the amplitude of the electro-acoustic conversion device until the maximum amplitude of the detected amplitude is the maximum amplitude parameter Xmax, and tests the temperature of the voice coil at this time; S3, if the voice coil temperature tested at this time is The voice coil maximum temperature parameter Tmax, the performance of the electroacoustic conversion device is tested after maintaining the gain of the frequency sweep signal for a predetermined period of time; if the voice coil temperature tested at this time is higher/lower than Tmax, the tape is gradually decreased.
  • the resonant frequency F0 of the electroacoustic transducer is described.
  • the frequency sweep signal is a sinusoidal frequency sweep signal, and the frequency ranges from 100 Hz to 20 kHz.
  • the gain boosting frequency point>the resonant frequency of the electroacoustic converting device is F0+100 Hz.
  • the gain boosting frequency is 4 kHz.
  • the method further comprises the step S4, if the performance of the tested electroacoustic conversion device is qualified, increasing Xmax by 0.01 mm while increasing Tmax by 5 °C, and then re-testing according to steps S1-S3.
  • the method further comprises the step S5 of determining that the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax are unreasonable if the performance of the tested electroacoustic conversion device is unsatisfactory.
  • a system for simultaneously verifying amplitude and temperature parameters of an electroacoustic transducing device comprising: a controller, a frequency sweep signal generator, a power amplifier unit, an amplitude range finder, and a temperature detector;
  • the controller includes a parameter input module and a gain adjustment module, and the gain adjustment module is coupled to the frequency sweep signal generator to control a gain of a frequency sweep signal sent by the frequency sweep signal generator, and the sweep signal is sent through a power amplifier
  • the unit is amplified and input to the electroacoustic conversion device;
  • the amplitude range finder is configured to test an amplitude of the electro-acoustic conversion device and transmit the measured amplitude to the gain adjustment module,
  • the temperature detector is used for testing a voice coil temperature of the electroacoustic conversion device and transmitting the tested voice coil temperature to the gain adjustment module;
  • the parameter input module is configured to input a maximum amplitude parameter Xmax and a voice coil maximum temperature parameter Tmax of the electroacou
  • the gain of the frequency sweep signal is maintained for a predetermined time to test the test.
  • the performance of the electroacoustic conversion device if the voice coil temperature tested at this time is higher/lower than Tmax, the gain of the frequency band above the gain boost frequency point is gradually reduced/increased until the detected sound
  • the loop temperature is Tmax, and the gain of the swept frequency signal is maintained for a predetermined time to test the performance of the electroacoustic transducing device; the gain boosting frequency point> the resonant frequency F0 of the electroacoustic transducing device.
  • the frequency sweep signal sent by the frequency sweep signal generator is a sinusoidal frequency sweep signal, and the frequency ranges from 100 Hz to 20 kHz.
  • the gain boosting frequency point>the resonant frequency of the electroacoustic converting device is F0+100 Hz.
  • the gain boosting frequency is 4 kHz.
  • the parameter input module is further configured to: if the performance of the tested electroacoustic conversion device is qualified, increase Xmax by 0.01 mm and increase Tmax by 5 ° C, and increase the maximum amplitude parameter Xmax and increase The voice coil maximum temperature parameter Tmax is sent to the gain adjustment module.
  • a controller for simultaneously verifying amplitude and temperature parameters of an electroacoustic transducing device comprising a parameter input module and a gain adjustment module; the parameter input module for inputting an electroacoustic conversion device a maximum amplitude parameter Xmax and a voice coil maximum temperature parameter Tmax, and transmitting a maximum amplitude parameter Xmax and a voice coil maximum temperature parameter Tmax to the gain adjustment module; the gain adjustment module is configured to receive the amplitude and sound of the tested electroacoustic conversion device The coil temperature is adjusted, and the gain of the frequency sweep signal input to the electroacoustic transducer is adjusted so that the maximum value of the amplitude of the tested electroacoustic transducer is Xmax and the voice coil temperature is Tmax.
  • the gain adjustment module adjusts the gain of the frequency sweep signal input to the electroacoustic conversion device, including: adjusting the gain of the full frequency band of the frequency sweep signal until the maximum value of the tested amplitude is Xmax, if the test is performed at this time
  • the voice coil temperature is higher/lower than Tmax, and gradually decreases/increased the gain of the frequency band above the gain boost frequency point until the tested voice coil temperature is Tmax; the gain boost frequency point>
  • the resonant frequency F0 of the electroacoustic transducer is described.
  • the inventors of the present invention have found that the amplitude verification and the temperature verification of the electroacoustic conversion device in the prior art have great limitations and inaccuracies. Therefore, the technical task or technical problem to be solved by the present invention is The present invention is a new technical solution that has never been or is not intended by those skilled in the art.
  • FIG. 1 is a schematic diagram of a method for verifying a maximum amplitude parameter Xmax in the prior art.
  • FIG. 2 is a schematic diagram of a method for verifying a voice coil maximum temperature parameter Tmax in the prior art.
  • FIG. 3 is a flow diagram of a method for simultaneously verifying amplitude and temperature parameters of the present invention.
  • FIG. 4 is a circuit block diagram of a system for simultaneously verifying amplitude and temperature parameters of the present invention.
  • FIG. 5 is a schematic flow chart of the gain adjustment module of FIG. 4 adjusting the gain of the sweep signal.
  • the present invention provides a simultaneous verification of the amplitude of an electroacoustic transducer and
  • the method of temperature parameters includes the following steps:
  • the voice coil temperature tested at this time is the voice coil maximum temperature parameter Tmax
  • the performance of the electroacoustic conversion device is tested after maintaining the gain of the frequency sweep signal for a predetermined time; if the sound is tested at this time
  • the loop temperature is higher/lower than Tmax, gradually decreasing/increasing the gain of the frequency band of the swept frequency signal above the gain boost frequency point until the tested voice coil temperature is Tmax, and then maintaining the gain of the swept frequency signal is not
  • the performance of the electroacoustic transducing device is tested after a predetermined period of operation; the gain boosting frequency point > the resonant frequency F0 of the electroacoustic transducing device.
  • the electroacoustic conversion device referred to in the present invention may be, for example, a speaker or a receiver.
  • the swept signal can be a sinusoidal sweep signal with a frequency range of 100 Hz to 20 kHz.
  • the maximum amplitude parameter Xmax refers to the maximum amplitude allowed under normal operation of the electroacoustic conversion device
  • the maximum voice coil temperature Tmax refers to the maximum voice coil temperature allowed under normal operation of the electroacoustic conversion device.
  • the present invention sets the gain boosting frequency to the resonant frequency F0 of the electroacoustic converting device. After the maximum amplitude of the electro-acoustic transducing device reaches Xmax, adjusting the gain of the frequency band above the gain boosting frequency of the swept frequency signal does not affect. The maximum value of the amplitude of the electroacoustic transducer, and the maximum value of the amplitude of the electroacoustic transducer is still Xmax.
  • the gain raising frequency point exceed the resonance frequency F0 by a certain distance, preferably the gain raising frequency point> (the resonance frequency of the electroacoustic conversion device F0+100 Hz), or the typical selection of the gain raising frequency point is 4 kHz, which can satisfy the market.
  • the gain raising frequency point> the resonance frequency of the electroacoustic conversion device F0+100 Hz
  • the typical selection of the gain raising frequency point is 4 kHz, which can satisfy the market.
  • Testing the performance of the electroacoustic conversion device may be testing the performance of the electroacoustic conversion device such as frequency response, sensitivity, directivity, noise, output efficiency, etc., after a predetermined period of time, After 96 hours, the performance of the electroacoustic transducer is not reduced compared with the beginning, and the appearance is still good, indicating that the performance of the electroacoustic transducer is qualified.
  • the object of the present invention is to simultaneously verify the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax of the electroacoustic conversion device, so the present invention only needs to make the maximum value of the amplitude of the electroacoustic conversion device the maximum amplitude parameter Xmax and the voice coil temperature as the voice coil.
  • the maximum temperature parameter Tmax can be used, and then the length of the predetermined time and the specific performance test item can be set according to different performance requirements of the electroacoustic conversion device, which are all within the protection scope of the present invention.
  • Xmax and Tmax are the actual application of the electroacoustic conversion device.
  • the maximum value can be obtained by the following method: the maximum amplitude and the voice coil maximum temperature actually applied by the electroacoustic transducer: increase Xmax by 0.01 mm and increase Tmax by 5 °C, and then re-test according to steps S1-S3; The S1-S4 successive trials approach the maximum amplitude of the practical application of the electroacoustic transducer and the maximum temperature of the voice coil.
  • the present invention also provides a system for simultaneously verifying amplitude and temperature parameters of an electroacoustic transducing device, comprising: a controller 6, a frequency sweep signal generator 1, a power amplifier unit 2, an amplitude range finder 3, and Temperature detector 4.
  • the amplitude range finder 3 can be, for example, a laser range finder.
  • the controller 6 includes a parameter input module 61 and a gain adjustment module 62.
  • the gain adjustment module 62 is connected to the frequency sweep signal generator 1 to control the gain of the frequency sweep signal sent by the frequency sweep signal generator 1, and the frequency sweep signal is amplified by the power amplifier unit 2. It is then input to the electroacoustic conversion device 5.
  • the amplitude range finder 3 is for testing the amplitude of the electro-acoustic conversion device 5 and transmitting the measured amplitude to the gain adjustment module 62 for testing the voice coil temperature of the electro-acoustic conversion device 5 and transmitting the tested voice coil Temperature to gain adjustment module 62;
  • the parameter input module 61 is configured to input the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax, and send the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax to the gain. Adjustment module 62;
  • the gain adjustment module 62 is configured to: adjust the gain of the full frequency band of the frequency sweep signal until the maximum value of the tested amplitude is Xmax, that is, the measured amplitude of the electroacoustic conversion device at the resonance frequency F0 is Xmax. If the measured voice coil temperature is Tmax at this time, the gain of the sweep signal is maintained, and the performance of the electroacoustic conversion device 5 is tested after a predetermined time; if the voice coil temperature tested at this time is higher than Tmax, the voltage is gradually decreased.
  • the voice coil temperature is lower than Tmax, and the gain of the frequency band above the gain boost frequency point is gradually increased until the tested voice coil temperature reaches Tmax, and then the gain of the sweep signal is maintained until a predetermined time to test the electroacoustic conversion.
  • the system may further include a judging unit that judges that the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax are unreasonable if the performance of the tested electroacoustic conversion device 5 is unacceptable.
  • the parameter input module 61 is further configured to: if the performance of the electroacoustic conversion device 5 is tested as acceptable, increase Xmax by 0.01 mm and increase Tmax by 5 ° C, and increase the maximum amplitude parameter Xmax and the increased voice coil.
  • the temperature parameter Tmax is sent to the gain adjustment module 62.
  • the gain of the sweep signal is then readjusted by the gain adjustment module 62 in the manner described above to retest the performance of the electroacoustic transducer 5 under the increased Xmax and Tmax conditions.
  • the process of adjusting the gain of the sweep signal by the gain adjustment module 62 is as follows:
  • the gain adjustment module 62 adjusts the gain of the full frequency band of the frequency sweep signal, and simultaneously tests the amplitude of the electroacoustic conversion device 5 by the amplitude range finder 3 until the maximum value of the measured amplitude is Xmax, that is, the electroacoustic conversion device 5 The measured amplitude at the resonant frequency F0 is Xmax.
  • step (8) If the tested voice coil temperature is equal to Tmax, proceed to step (8); otherwise, proceed to step (6).
  • step (7) If the tested voice coil temperature is higher than Tmax, the gain adjustment module 62 reduces the gain of the frequency band above the gain boost frequency by 1 dB, and then returns to step (4); otherwise, step (7) is performed.
  • the gain adjustment module 62 increases the gain of the frequency band of the frequency sweep signal above the gain boost frequency point by 1 dB, and then returns to step (4).
  • the gain adjustment module 62 maintains the gain of the frequency sweep signal for a predetermined time and then tests the performance of the electroacoustic conversion device 5.
  • the gain adjustment module 62 adjusts the gain of the frequency band above the gain boost frequency point by 1 dB each time to make the tested voice coil temperature approach Tmax, but the present invention is not limited thereto, according to practical applications. It is also possible to adjust other values such as 0.5 dB or 2 dB each time. In another embodiment, the value of the gain adjustment module 62 may be different each time. For example, the gain adjustment module 62 first performs coarse adjustment at 1 dB. Once the tested voice coil temperature is closer to Tmax, 0.1 dB is used. Fine tuning makes it possible to further ensure that the voice coil temperature reaches Tmax accurately. These should also fall within the scope of protection of the present invention.
  • the actual maximum amplitude of the electroacoustic conversion device 5 is Xmax
  • the actual temperature of the voice coil is Tmax
  • the performance of the electroacoustic conversion device 5 is tested after the gain of the frequency sweep signal is maintained for a predetermined time, if the performance is not If it is qualified, it is unreasonable to judge the maximum amplitude parameter Xmax and the voice coil maximum temperature parameter Tmax.
  • the mechanism is to adjust the entire sweep
  • the gain of the frequency signal inevitably causes a change in temperature, so the control of the test cannot be guaranteed, and the verification of the temperature Tmax is also true.
  • the present invention adopts a sweep signal whose gain can be adjusted in stages, and can control the maximum amplitude for each gain, and the voice coil temperature can be tested in real time, and the test is more accurate and more convincing.
  • the verification method of the present invention utilizes the heat generated by the electroacoustic conversion device itself to perform temperature verification, eliminating the temperature control device, and saving the test cost.

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  • Acoustics & Sound (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

一种同时验证电声转换装置的振幅和温度参数的方法、系统以及控制器，包括：S1,接入扫频信号至电声转换装置；S2，调节扫频信号的全频段的增益直至测试出的振幅的最大值为最大振幅参数Xmax，测试此时音圈的温度；S3，如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度为Tmax，然后维持扫频信号的增益不变运行预定时间后测试电声转换装置的性能；增益提升频点＞电声转换装置的共振频率F0。使得电声转换装置在最大振幅达到Xmax的同时音圈温度也达到Tmax，更加准确的模拟了电声转换装置的极限振动状态，实验结果更加可靠。

Description

同时验证电声转换装置振幅和温度参数的方法及系统 技术领域
本发明涉及一种同时验证电声转换装置的振幅和温度参数的方法及系统，以及一种用于同时验证电声转换装置的振幅和温度参数的控制器。
背景技术
智能功放系统因其具有提高电声转换装置的音质和保护电声转换装置的双重功能，近年来在手机领域得到迅速推广。智能功放可以即时监控电声转换装置的振幅和音圈温度情况并作出反馈，以达到保护电声转换装置的目的。这要求电声转换装置生产商提供准确的最大振幅参数和音圈最高温度参数，这样的参数打破已有的参数定义方法和可靠性验证方法。为了配合智能功放保护和提升电声转换装置性能，需要验证最大振幅参数Xmax和音圈最高温度参数Tmax的合理性。
传统验证方法是分别对最大振幅参数Xmax和音圈最高温度参数Tmax进行验证。
参考图1所示为验证最大振幅参数Xmax的方案，由扫频信号发生器1生成一个传统扫频信号经由功放单元2放大后接入电声转换装置，用振幅测距仪3测出最大振幅，检测最大振幅是否符合待验证的最大振幅参数Xmax。如果不符合，则增大或缩小功放单元的增益，直到实测的最大振幅符合Xmax。在此扫频信号和增益下持续运行预定时间后对电声转换装置进行性能试验。
参考图2所示为验证音圈最高温度参数Tmax的方案，由扫频信号发生器1生成一个传统扫频信号经由功放单元2放大后接入电声转换装置，用温度检测仪4测试音圈的温度，检测音圈温度是否符合待验证的音圈最高温度参数Tmax。如果不符合，则增大或缩小功放单元的增益，直 到实测的音圈温度符合Tmax。在此扫频信号和增益下持续运行预定时间后对电声转换装置进行性能试验。
但是发明人发现，上述方法具有以下局限性：
(1)电声转换装置在正常工作时，振幅和音圈温度是同时影响电声转换装置的工作状态的，在振幅最大并且音圈温度也最高的状态下，电声转换装置依然能正常工作，这样的Xmax和Tmax才是有效、合理的。然而传统的验证方法中，振幅的验证和音圈最高温度的验证是分离的，无法模拟实际情况。
(2)传统方法在验证振幅时，为了使振幅达到待验证的最大振幅参数Xmax，会增大或减小功放单元的增益，这势必会造成音圈温度的上升或下降，甚至音圈温度会超过音圈耐受温度而造成烧毁，这种情况下难以判断是不合理的Xmax导致的失效还是音圈温度的影响导致的失效。同样，在验证音圈温度时，为了使音圈温度达到待验证的音圈最高温度Tmax，会增大或减小功放单元的增益，这样必然导致整个频段的振幅增大或减小，甚至振幅有可能会超过音圈的耐受范围造成音圈断线，这种情况下很难识别是不合理的音圈最高温度Tmax导致的失效还是振幅的影响导致的失效。
发明内容
本发明的目的是提供一种能够同时验证电声转换装置的最大振幅参数Xmax和音圈最高温度参数Tmax的新技术方案。
根据本发明的第一方面，提供了一种同时验证电声转换装置的振幅和温度参数的方法，包括以下步骤：S1、接入扫频信号至所述电声转换装置；S2、调节所述扫频信号的全频段的增益同时测试电声转换装置的振幅直至测试出的振幅的最大值为最大振幅参数Xmax，测试此时音圈的温度；S3、如果此时测试出的音圈温度为音圈最高温度参数Tmax，维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益 提升频点以上的频段的增益直至测试出音圈温度为Tmax，然后维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；所述增益提升频点＞所述电声转换装置的共振频率F0。
优选的，所述扫频信号为正弦扫频信号，频率范围为100Hz-20kHz。
优选的，所述增益提升频点＞所述电声转换装置的共振频率F0+100Hz。
优选的，所述增益提升频点为4kHz。
优选的，所述方法还包括步骤S4、如果测试出的电声转换装置的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，再按照步骤S1-S3重新进行测试。
优选的，所述方法还包括步骤S5、如果测试出的电声转换装置的性能为不合格，判断最大振幅参数Xmax和音圈最高温度参数Tmax为不合理。
根据本发明的第二方面，提供了一种同时验证电声转换装置的振幅和温度参数的系统，包括：控制器、扫频信号发生器、功放单元、振幅测距仪以及温度检测仪；所述控制器包括参数输入模块和增益调节模块，所述增益调节模块与所述扫频信号发生器连接以控制所述扫频信号发生器发出的扫频信号的增益，所述扫频信号经由功放单元放大后输入至所述电声转换装置；所述振幅测距仪用于测试所述电声转换装置的振幅并且发送测试出的振幅至所述增益调节模块，所述温度检测仪用于测试所述电声转换装置的音圈温度并发送测试出的音圈温度至所述增益调节模块；所述参数输入模块用于输入电声转换装置的最大振幅参数Xmax和音圈最高温度参数Tmax，并且将最大振幅参数Xmax和音圈最高温度参数Tmax发送至所述增益调节模块；所述增益调节模块，用于：调节所述扫频信号的全频段的增益直至测试出的振幅的最大值为Xmax，如果此时测出的音圈温度为Tmax，维持所述扫频信号的增益不变运行预定时间以测试所述电声转换装置的性能；如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益提升频点以上的频段的增益直至测试出的音 圈温度为Tmax，维持所述扫频信号的增益不变运行预定时间以测试所述电声转换装置的性能；所述增益提升频点＞所述电声转换装置的共振频率F0。
优选的，所述扫频信号发生器发出的扫频信号为正弦扫频信号，频率范围为100Hz-20kHz。
优选的，所述增益提升频点＞所述电声转换装置的共振频率F0+100Hz。
优选的，所述增益提升频点为4kHz。
优选的，所述参数输入模块还用于：如果测试出的电声转换装置的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，将增大后的最大振幅参数Xmax和增大后的音圈最高温度参数Tmax发送至所述增益调节模块。
根据本发明的第三方面，提供了一种用于同时验证电声转换装置的振幅和温度参数的控制器，包括参数输入模块和增益调节模块；所述参数输入模块用于输入电声转换装置的最大振幅参数Xmax和音圈最高温度参数Tmax，并且将最大振幅参数Xmax和音圈最高温度参数Tmax发送至所述增益调节模块；所述增益调节模块用于接收测试出的电声转换装置的振幅和音圈温度，并且调节输入到电声转换装置的扫频信号的增益以使测试出的电声转换装置的振幅的最大值为Xmax并且音圈温度为Tmax。
优选的，所述增益调节模块调节输入到电声转换装置的扫频信号的增益包括：调节所述扫频信号的全频段的增益直至测试出的振幅的最大值为Xmax，如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度为Tmax；所述增益提升频点＞所述电声转换装置的共振频率F0。
本发明的发明人发现，现有技术中分别对电声转换装置进行振幅验证和温度验证具有很大的局限性和不准确性，因此，本发明所要实现的技术任务或者所要解决的技术问题是本领域技术人员从未想到的或者没有预定到的，故本发明是一种新的技术方案。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是现有技术验证最大振幅参数Xmax的方法示意图。
图2是现有技术验证音圈最高温度参数Tmax的方法示意图。
图3是本发明同时验证振幅和温度参数的方法的流程示意图。
图4是本发明同时验证振幅和温度参数的系统的电路框图。
图5是图4中的增益调节模块调节扫频信号增益的流程示意图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
参考图3所示，本发明提供了一种同时验证电声转换装置的振幅和 温度参数的方法，包括以下步骤：
S1、接入扫频信号至所述电声转换装置。
S2、调节所述扫频信号的全频段的增益同时测试电声转换装置的振幅直至测试出的振幅的最大值为最大振幅参数Xmax，测试此时音圈的温度。
S3、如果此时测试出的音圈温度为音圈最高温度参数Tmax，维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度为Tmax，然后维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；所述增益提升频点＞所述电声转换装置的共振频率F0。
S4、如果测试出的电声转换装置的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，再按照步骤S1-S3重新进行测试。
S5、如果测试出的电声转换装置的性能为不合格，判断最大振幅参数Xmax和音圈最高温度参数Tmax为不合理。
本发明中所指的电声转换装置，例如可以为扬声器或者受话器。扫频信号可以为正弦扫频信号，频率范围可以为100Hz-20kHz。
最大振幅参数Xmax是指电声转换装置正常工作下允许的最大振幅，音圈最高温度Tmax是指电声转换装置正常工作下允许的音圈最高温度。
本发明将增益提升频点设置为＞电声转换装置的共振频率F0，在电声转换装置的振幅的最大值达到Xmax之后，调整扫频信号的增益提升频点以上的频段的增益不会影响电声转换装置的振幅的最大值，电声转换装置的振幅的最大值依然为Xmax。可以令增益提升频点超出共振频率F0一定距离，优选增益提升频点＞(电声转换装置的共振频率F0+100Hz)，或者典型的选用所述增益提升频点为4kHz，即可满足市面上现有各种电声转换装置进行本发明测试的需求。
测试电声转换装置的性能，例如可以是对电声转换装置的频响、灵敏度、指向性、噪声、输出效率等性能的测试，如果经过预定时间后，例 如经过96小时后，电声转换装置的性能和一开始相比并没有降低，外观状况依然良好，那么说明电声转换装置的性能合格。本发明的目的是同时验证电声转换装置的最大振幅参数Xmax和音圈最高温度参数Tmax，因此本发明只需要使电声转换装置的振幅的最大值为最大振幅参数Xmax并且音圈温度为音圈最高温度参数Tmax即可，之后可以根据电声转换装置的不同性能要求设置预定时间的长度和具体的性能测试项目，这些都应该属于本发明的保护范围内。
经过步骤S1-S3完成性能测试后，如果测试出的电声转换装置的性能为不合格，就可以判断出最大振幅参数Xmax和音圈最高温度参数Tmax为不合理，否则可以初步判断为合理。
经过步骤S1-S3性能测试后，如果测试出的电声转换装置的性能为合格，即电声转换装置在Xmax和Tmax下工作正常，也不能因此确定Xmax和Tmax就是电声转换装置实际应用允许的最大值，可以按照下述方法取得电声转换装置实际应用的最大振幅和音圈最高温度：将Xmax增加0.01mm同时将Tmax增加5℃，然后再按照步骤S1-S3重新进行测试；循环执行步骤S1-S4逐次试探逼近电声转换装置实际应用的最大振幅和音圈最高温度。
参考图4所示，本发明还提供了一种同时验证电声转换装置的振幅和温度参数的系统，包括：控制器6、扫频信号发生器1、功放单元2、振幅测距仪3以及温度检测仪4。振幅测距仪3例如可以为激光测距仪。
控制器6包括参数输入模块61和增益调节模块62，增益调节模块62与扫频信号发生器1连接以控制扫频信号发生器1发出的扫频信号的增益，扫频信号经由功放单元2放大后输入至电声转换装置5。
振幅测距仪3用于测试电声转换装置5的振幅并且发送测试出的振幅至增益调节模块62，温度检测仪4用于测试电声转换装置5的音圈温度并发送测试出的音圈温度至增益调节模块62；
参数输入模块61用于输入最大振幅参数Xmax和音圈最高温度参数Tmax，并且将最大振幅参数Xmax和音圈最高温度参数Tmax发送至增益 调节模块62；
增益调节模块62，用于：调节扫频信号的全频段的增益直至测试出的振幅的最大值为Xmax，即电声转换装置在共振频率F0处的实测的振幅为Xmax。如果此时测出的音圈温度为Tmax，维持扫频信号的增益不变，经过预定时间后测试电声转换装置5的性能；如果此时测试出的音圈温度高于Tmax，逐渐减小扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度降至Tmax，然后维持扫频信号的增益不变至预定时间以测试电声转换装置5的性能；如果测试出的音圈温度低于Tmax，逐渐增大扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度达到Tmax，然后维持扫频信号的增益不变至预定时间以测试电声转换装置5的性能；增益提升频点＞电声转换装置的共振频率F0。
本系统还可以包括判断单元，如果测试出的电声转换装置5的性能为不合格，判断最大振幅参数Xmax和音圈最高温度参数Tmax为不合理。
参数输入模块61还用于：如果测试出电声转换装置5的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，将增大后的最大振幅参数Xmax和增大后的音圈最高温度参数Tmax发送至增益调节模块62。然后由增益调节模块62按照上述方式重新调整扫频信号的增益，以重新测试在增大后的Xmax和Tmax条件下电声转换装置5的性能。
参考图5所示，增益调节模块62调节扫频信号增益的过程如下：
(1)在参数输入模块61中输入待验证的Xmax和Tmax并且发送到增益调节模块62。
(2)增益调节模块62调节扫频信号的全频段的增益，同时利用振幅测距仪3测试电声转换装置5的振幅直至测试出的振幅的最大值为Xmax，即电声转换装置5在共振频率F0处的实测的振幅为Xmax。
(4)利用温度检测仪4测试此时音圈的温度，比较测试出的音圈温度和Tmax。
(5)如果测试出的音圈温度等于Tmax，进行步骤(8)；否则进行步骤(6)。
(6)如果测试出的音圈温度高于Tmax，增益调节模块62以1dB减小扫频信号在增益提升频点以上的频段的增益，然后返回步骤(4)；否则进行步骤(7)。
(7)增益调节模块62以1dB增大扫频信号在增益提升频点以上的频段的增益，然后返回步骤(4)。
(8)增益调节模块62保持扫频信号的增益至预定时间，然后测试电声转换装置5的性能。
上述实施例中，增益调节模块62是对扫频信号在增益提升频点以上的频段的增益每次调整1dB以使测试出的音圈温度逼近Tmax，但本发明不限定于此，根据实际应用情况也可以是每次调整0.5dB或者2dB等其它数值。在另外一个实施例里，增益调节模块62每次调整的值可以是不一样的，例如，增益调节模块62先以1dB进行粗调，一旦测试出的音圈温度比较接近Tmax，再用0.1dB进行细调，这样能够进一步保证音圈温度精确的达到Tmax。这些也都应当属于本发明的保护范围内。
在进入到步骤(8)时，电声转换装置5的实际最大振幅为Xmax，音圈实际温度为Tmax，保持扫频信号的增益经过预定时间后测试电声转换装置5的性能，如果性能不合格，判断最大振幅参数Xmax和音圈最高温度参数Tmax为不合理。
在上述验证中，即使电声转换装置5在Xmax和Tmax下工作正常，即电声转换装置5的性能为合格，也不能因此确定Xmax和Tmax即为电声转换装置5实际应用允许的最大值，可以逐次试探慢慢逼近扬声器装置5实际应用的最大值，例如将Xmax增加0.01mm同时将Tmax增加5℃然后进行上述步骤(1)-(8)。
本发明的技术效果在于：
(1)保证最大振幅Xmax验证和音圈最高温度Tmax验证的同时性。在最大振幅达到Xmax的同时音圈温度也达到Tmax，更加准确的模拟了电声转换装置的极限振动状态。
(2)在常规的最大振幅Xmax验证试验中，其机理在于调整整个扫 频信号的增益，不可避免的会引起温度的变化，故不能保证试验的对照性，温度Tmax的验证亦是如此。而本发明采用增益可以分段调节的扫频信号，对于每种增益均能控制最大振幅这一变量，并且音圈温度能够实时检验，试验更准确也更具有说服力。
(3)本发明的验证方法利用电声转换装置自身产生的热量来进行温度验证，省去温度控制设备，节约试验成本。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种同时验证电声转换装置的振幅和温度参数的方法，其特征在于，包括以下步骤：
    S1、接入扫频信号至所述电声转换装置；
    S2、调节所述扫频信号的全频段的增益同时测试电声转换装置的振幅直至测试出的振幅的最大值为最大振幅参数Xmax，测试此时音圈的温度；
    S3、如果此时测试出的音圈温度为音圈最高温度参数Tmax，维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度为Tmax，然后维持所述扫频信号的增益不变运行预定时间后测试所述电声转换装置的性能；所述增益提升频点＞所述电声转换装置的共振频率F0。
  2. 根据权利要求1所述的方法，其特征在于，所述扫频信号为正弦扫频信号，频率范围为100Hz-20kHz。
  3. 根据权利要求1-2任一项所述的方法，其特征在于，所述增益提升频点＞所述电声转换装置的共振频率F0+100Hz，或者，所述增益提升频点为4kHz。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，还包括步骤S4、如果测试出的电声转换装置的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，再按照步骤S1-S3重新进行测试。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，还包括步骤S5、如果测试出的电声转换装置的性能为不合格，判断最大振幅参数Xmax和音圈最高温度参数Tmax为不合理。
  6. 一种同时验证电声转换装置的振幅和温度参数的系统，其特征在于，包括：控制器、扫频信号发生器、功放单元、振幅测距仪以及温度检测仪；
    所述控制器包括参数输入模块和增益调节模块，所述增益调节模块与所述扫频信号发生器连接以控制所述扫频信号发生器发出的扫频信号的增益，所述扫频信号经由功放单元放大后输入至所述电声转换装置；
    所述振幅测距仪用于测试所述电声转换装置的振幅并且发送测试出的振幅至所述增益调节模块，所述温度检测仪用于测试所述电声转换装置的音圈温度并发送测试出的音圈温度至所述增益调节模块；
    所述参数输入模块用于输入电声转换装置的最大振幅参数Xmax和音圈最高温度参数Tmax，并且将最大振幅参数Xmax和音圈最高温度参数Tmax发送至所述增益调节模块；
    所述增益调节模块，用于：调节所述扫频信号的全频段的增益直至测试出的振幅的最大值为Xmax，如果此时测出的音圈温度为Tmax，维持所述扫频信号的增益不变运行预定时间以测试所述电声转换装置的性能；如果此时测试出的音圈温度高于/低于Tmax，逐渐减小/增大所述扫频信号在增益提升频点以上的频段的增益直至测试出的音圈温度为Tmax，维持所述扫频信号的增益不变运行预定时间以测试所述电声转换装置的性能；所述增益提升频点＞所述电声转换装置的共振频率F0。
  7. 根据权利要求6所述的系统，其特征在于，所述扫频信号发生器发出的扫频信号为正弦扫频信号，频率范围为100Hz-20kHz。
  8. 根据权利要求6-7任一项所述的系统，其特征在于，所述增益提升频点＞所述电声转换装置的共振频率F0+100Hz，或者，所述增益提升频点为4kHz。
  9. 根据权利要求6-8任一项所述的系统，其特征在于，所述参数输入模块还用于：如果测试出的电声转换装置的性能为合格，将Xmax增加0.01mm同时将Tmax增加5℃，将增大后的最大振幅参数Xmax和增大后的音圈最高温度参数Tmax发送至所述增益调节模块。
  10. 一种用于同时验证电声转换装置的振幅和温度参数的控制器，其特征在于，包括参数输入模块和增益调节模块；
    所述参数输入模块用于输入电声转换装置的最大振幅参数Xmax和 音圈最高温度参数Tmax，并且将最大振幅参数Xmax和音圈最高温度参数Tmax发送至所述增益调节模块；
    所述增益调节模块用于接收测试出的电声转换装置的振幅和音圈温度，并且调节输入到电声转换装置的扫频信号的增益以使测试出的电声转换装置的振幅的最大值为Xmax并且音圈温度为Tmax。
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