CN105959892A - Method and system used for testing loudspeakers - Google Patents
Method and system used for testing loudspeakers Download PDFInfo
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- CN105959892A CN105959892A CN201610284759.6A CN201610284759A CN105959892A CN 105959892 A CN105959892 A CN 105959892A CN 201610284759 A CN201610284759 A CN 201610284759A CN 105959892 A CN105959892 A CN 105959892A
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- speaker
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- loudspeaker
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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
Abstract
The invention discloses a method and system used for testing loudspeakers. The method comprises utilizing a laser displacement sensor to detect diaphragm displacement values of a sample loudspeaker, so as to obtain a corresponding excitation voltage required by the sample loudspeaker when the diaphragm displacement values of the sample loudspeaker at different frequency points reach largest displacement; generating the EQ curve of the sample loudspeaker, the EQ curve being ratios between excitation voltages and a calibration voltage of the sample loudspeaker at different frequency points; and based on the EQ curve of the sample loudspeaker and the calibration voltage, testing a loudspeaker to be tested and obtaining a test result. The method can be applied to a loudspeaker actual product test system to discover problems of the loudspeaker to be tested more easily.
Description
Technical field
The present invention relates to electronic component detection technique, more particularly, to the test side of a kind of speaker
Method and test system.
Background technology
At electronic technology field, the audition detection of speaker is an important operation, and its detection side
Test result is played an important role by method and detection equipment.Along with the development of mobile Internet, electronics
Product is increasingly favored by user.Under the trend with high-power the most lightening at electronic product,
The application in electronic product of the intelligent power amplifier becomes main flow.Intelligent power amplifier can be real-time
Adjust its output signal so that speaker reaches maximum displacement (this in applicable frequency range as far as possible
In invention, displacement refers to the displacement of the vibrating diaphragm of speaker；Temperature refers to the temperature of loudspeaker voice coil), and
Less than predetermined temperature threshold, such as, the maximum temperature of product design.
But, in the prior art, generally use fixing in the audition test of anechoic chamber or product line
Voltage control to test signal, thus it is difficult to ensure that speaker is surveyed under conditions of maximum displacement
Trying, this, for have employed the application of the speaker of intelligent power amplifier, is unfavorable for pinpointing the problems,
Have impact on the actual application of speaker.Therefore, the most accurately test and apply intelligent power amplifier
In the case of speaker performance, become the challenge in speaker field tests.
Accordingly, it would be desirable to improve prior art to solve at least one above-mentioned problem.
Summary of the invention
It is an object of the present invention to provide the new solution of a kind of speaker test.
According to the first aspect of the invention, a kind of method for test loudspeaker.The method includes:
Utilize the shift value of the laser displacement sensor detection sample diaphragm of loudspeaker, with when described in different frequent points
When the shift value of the sample diaphragm of loudspeaker reaches maximum displacement, obtain required for described sample speaker
Corresponding driving voltage；Generating the EQ curve of described sample speaker, described EQ curve is described sample
The product speaker described driving voltage at different frequent points and the ratio of calibration voltage；And based on described sample
The EQ curve of product speaker and described calibration voltage are tested speaker to be measured and obtain test result.
Preferably, when described sample speaker temperature higher than predetermined temperature threshold time, reduce institute
State the driving voltage of sample speaker.
Preferably, it is higher than predetermined displacement threshold when the displacement of the described sample diaphragm of loudspeaker at certain frequency
During value, reduce the described sample speaker driving voltage at this frequency.
Preferably, when the temperature of speaker to be measured is higher than predetermined temperature threshold, EQ is adjusted in real time
Curve.
Preferably, EQ curve is stored as the form of file with during testing speaker to be measured
Read.
According to the second aspect of the invention, it is provided that a kind of system for test loudspeaker.This system
Including: for utilizing the shift value of the laser displacement sensor detection sample diaphragm of loudspeaker with when in difference
The shift value of the sample diaphragm of loudspeaker described in frequency reaches to obtain described sample speaker institute during maximum displacement
The module of the corresponding driving voltage needed；For generating the mould of the EQ curve of described sample speaker
Block, described EQ curve is described sample speaker at the described driving voltage of different frequent points and calibration voltage
Ratio；And EQ curve based on described sample speaker and the test of described calibration voltage to be measured raise one's voice
Device also obtains the module of test result.
Preferably, described system also includes: for the temperature when described sample speaker higher than predetermined
Temperature threshold time reduce the module of driving voltage of described sample speaker.
Preferably, described system also includes: for when the displacement of the described sample diaphragm of loudspeaker is at certain
Frequency reduces the described sample speaker mould at the driving voltage of this frequency when being higher than predetermined displacement threshold value
Block.
Preferably, described also include: for the temperature when speaker to be measured higher than predetermined temperature threshold
Time adjust the module of EQ curve in real time.
Preferably, described system also includes: be stored as the form of file with in test for EQ curve
The module read during speaker to be measured.
The method and system for test loudspeaker according to the present invention, it is possible in test process, make
Speaker to be measured shift value in the range of its applying frequency reaches maximum displacement, thus is conducive to finding to produce
The problem of product.Additionally, in test process, it can also be ensured that shift value and the temperature of speaker do not surpass
Cross predetermined threshold value, thus avoid damaging speaker to be measured and/or the accuracy of impact test.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, its of the present invention
Its feature and advantage thereof will be made apparent from.
Accompanying drawing explanation
Combined in the description and the accompanying drawing of the part that constitutes description shows the reality of the present invention
Execute example, and together with its explanation for explaining the principle of the present invention.
Fig. 1 is the flow chart of the method for test loudspeaker according to embodiments of the present invention.
Fig. 2 is the schematic block diagram for temperature protecting method according to embodiments of the present invention.
Fig. 3 is that the displacement of the diaphragm of loudspeaker using intelligent power amplifier and common power amplifier is shown
It is intended to.
Fig. 4 is the schematic block diagram of test according to an embodiment of the invention speaker to be measured.
Detailed description of the invention
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should also be noted that
Unless specifically stated otherwise, the parts that illustrate the most in these embodiments and step positioned opposite,
Numerical expression and numerical value do not limit the scope of the invention.
Description only actually at least one exemplary embodiment is illustrative below, never makees
For to the present invention and application thereof or any restriction of use.
May not beg in detail for technology, method and apparatus known to person of ordinary skill in the relevant
Opinion, but in the appropriate case, described technology, method and apparatus should be considered a part for description.
Shown here with in all examples discussed, any occurrence should be construed as merely example
Property rather than as limit.Therefore, other example of exemplary embodiment can have different
Value.
It should also be noted that similar label and letter represent similar terms, therefore, one in following accompanying drawing
A certain Xiang Yi the accompanying drawing of denier is defined, then need not it is carried out further in accompanying drawing subsequently
Discuss.
Fig. 1 is the flow chart of the method for test loudspeaker according to embodiments of the present invention.
As shown in Figure 1, it is broadly divided into two stages according to the method for testing of the present invention.First stage is used
Carry out test sample speaker and obtain EQ curve, including step S110 and S120.Second stage be by
The EQ curve of sample speaker is applied in anechoic chamber's test or production line test, including step S130.
In step S110, utilize the shift value of the laser displacement sensor detection sample diaphragm of loudspeaker, with
When reaching maximum displacement at the shift value of the different frequent points sample diaphragm of loudspeaker, obtain sample speaker
Required driving voltage.
Generally, the audition test of speaker includes arranging swept frequency range, utilizes excitation in swept frequency range
The broadcasting of Control of Voltage test audio signal (such as, sine wave signal), is sweeping obtaining speaker
Test result in the range of Pin.Generally, described swept frequency range is set to the applicable frequency of speaker
Rate scope, such as, in the case of resonant frequency is 1.0kHz, be set to swept frequency range
100Hz-1.2kHz。
Those skilled in the art it should be appreciated that described speaker can applying frequency scope with multiple because of
Have pass, such as, the output voltage of the power amplifier being connected with speaker or the temperature of speaker
Relevant.The present invention is not specifically limited for the applying frequency scope of speaker, and tester needs root
Determined according to practical situation.
Described laser displacement sensor launches laser pulse signal, returns after the vibrating diaphragm of speaker scatters
This sensor, this sensor, according to laser pulse emission and the time of return, can measure speaker and shake
The displacement (amplitude) of film.Can be with non-contacting test loudspeaker by use laser displacement sensor
Shift value, its measuring accuracy is up to 1um.
In the present embodiment, maximum displacement is reached when the shift value at the different frequent points sample diaphragm of loudspeaker
Time, obtain the corresponding driving voltage required for sample speaker.Additionally, at test sample speaker
Process, may repeatedly can reach under different driving voltages obtaining sample speaker
Maximum displacement.
The maximum displacement of described speaker includes the forward maximum displacement of the diaphragm of loudspeaker or negative maximum
Displacement or direct current offset.Such as, forward maximum displacement is 0.27mm, and negative maximum displacement is-0.25mm
Deng.User can obtain any of the above-described kind of feelings during test sample speaker the most respectively
Condition or multiple in the case of driving voltage.
Additionally, during sample speaker is tested, can monitor speaker temperature or
Displacement, whether higher than predetermined threshold value, to reduce driving voltage accordingly, thus avoids sample speaker
The accuracy of test is affected because temperature is too high or displacement is excessive.
Such as, on certain frequency, predetermined displacement threshold value it is higher than when the displacement of the sample diaphragm of loudspeaker
Time, reduce the sample speaker driving voltage at frequency.
Such as, when sample speaker temperature higher than predetermined temperature threshold time, reduce sample and raise one's voice
The driving voltage of device.Can use various ways to reduce the driving voltage of sample speaker, such as,
Driving voltage is reduced according to certain step-length.Such as, when detecting that the temperature of sample speaker is at certain
When individual frequency is higher than predetermined threshold value, before reducing this frequency, all the excitation of frequencies or part frequency is electric
Pressure.This is slow change and the process of accumulation mainly due to variations in temperature, therefore, reduce whole frequency or
The driving voltage of part frequency more can reflect the change procedure of temperature.
Can ensure that by the way of above-mentioned reduction driving voltage and be obtained in that accurate test result,
Avoid damaging speaker simultaneously.
In step S120, according to the test result of step S110, generate the EQ curve of sample speaker,
Described EQ curve is the ratio of the sample speaker described driving voltage at different frequent points and calibration voltage.
Described calibration voltage may determine that into, such as, arbitrary in maximum driving voltage, swept frequency range
Driving voltage corresponding to frequency or need to select the driving voltage corresponding to a certain frequency according to test.
The frequency corresponding with calibration voltage is referred to as calibrating frequency in the present invention.
It will be understood by those of skill in the art that described EQ curve can be with the shape of gain (dB value)
Formula shows.The driving voltage change relative to calibration voltage can be demonstrated in this way intuitively
Change value and/or the precision of raising data record.
Described EQ curve can be to be stored as the form of file, in this way, it is possible to use soft
Part or additive method show or call described EQ curve in real time, thus for producing the survey of line or anechoic chamber
Examination.Additionally, be also beneficial to simulate the driving voltage value not being test for frequency, thus obtain frequency sweep
In the range of complete EQ curve.
Treat in step S130, EQ curve based on described sample speaker and the test of described calibration voltage
Survey speaker and obtain test result.
In step s 130, speaker to be measured is set according to the calibration voltage determined in step S120
Calibration frequency driving voltage.And recover swashing of other frequencies in swept frequency range according to EQ curve
Encourage voltage, for playing audio-frequency test signal to obtain the audition test result of speaker to be measured.
Those skilled in the art should be appreciated that during testing speaker to be measured, for sweeping
Frequently can arrange can be consistent with sample speaker for scope, frequency interval etc..And speaker to be measured
Similar to the kind of design of sample speaker, thus ensure to effectively utilize the EQ curve of sample speaker
With calibration voltage to obtain the test result more accurately of speaker to be measured.
During speaker to be measured is tested, it is also possible to the situation that temperature is too high occurs.
Therefore, in step s 130, it is also possible to include when speaker to be measured is higher than predetermined temperature at certain frequency
During degree threshold value, adjust the function of EQ curve in real time.
In this way, speaker to be measured can be avoided to damage because temperature is too high.Additionally, surveying
The test standard that can revise EQ curve in time to ensure speaker to be measured is adjusted in real time during examination
Really property.
Described test result includes the parameter that can reflect speaker tonequality performance to be measured.Such as, the most humorous
Wave distortion, higher hamonic wave distortion, intermodulation distortion and frequency response etc..Generally, tester is according in advance
Fixed standard judges the most qualified of product, such as, according to total harmonic distortion value or intermodulation distortion with
Predetermined standard compares, if greater than predetermined standard, then it is assumed that product is defective.
Fig. 2 is the schematic block diagram of the method for temperature protection according to embodiments of the present invention.
As in figure 2 it is shown, include unit of testing and controlling 210, sound card 220, power amplifier 230, sample
Product speaker 240 and laser sensor 250.
Described laser sensor 250 is for detecting the shift value of the vibrating diaphragm of sample speaker.Described sound card
The 220 audio-frequency test signals in the range of exporting swept frequency.Described power amplifier 230 is used for
The audio-frequency test signal of sound card 220 output is amplified, to promote the vibrating diaphragm of sample speaker to produce
Displacement.Described unit of testing and controlling 210 is for collecting the sample that laser displacement sensor 250 is fed back
Speaker shift value in the range of swept frequency, and sample is recorded when shift value reaches maximum displacement
The corresponding driving voltage of product speaker.
In the present embodiment, unit of testing and controlling 210 is additionally operable to produce and plays swashing of audio-frequency test signal
Encourage voltage.Unit of testing and controlling 210 can also be by sample speaker in different frequent points driving voltage and school
The relation of quasi-voltage generates EQ curve.
The temperature protecting method of sample speaker is specific as follows:
First, unit of testing and controlling 210 is in addition to producing swept-frequency signal, it is also possible to superposition one again
The parallel signal of low frequency (such as, less than 50Hz), and the output amplitude of this parallel signal is relative to just
Normal audio-frequency test signal is the lowest, and the contribution of product vibration displacement and heating is negligible by it.
Secondly, the temperature of sample speaker is calculated.Unit of testing and controlling 210 is except gathering laser displacement
Outside the feedback displacement of sensor, it is also possible to gather the signal at resistance (Rs) 260 two ends, and to this
Signal is filtered, and only retains parallel signal frequency, calculates its amplitude, it is believed that thus obtained
Voltage URsFor voltage during power amplifier output direct current signal, unit of testing and controlling 210 is according to URsWith
The value counter circuit electric current I of Rs, the parallel signal voltage U of power amplifier output is by testing and control list
Unit 210 controls, it is believed that be known quantity.
According to conditions above, the direct current resistance R of sample speaker can be calculated.Speaker under room temperature
The temperature coefficient of resistance α of circle is known quantity, can obtain current voice coil temperature according to temperature coefficient of resistance computing formula:
Wherein, R0For speaker room temperature T0Under direct current resistance, this most same T0Measure together and remember
Record is got off.
Finally, driving voltage or EQ curve are adjusted according to the real time temperature of the sample speaker obtained.
Such as, unit of testing and controlling 210 carries out sweep check according to current EQ, and obtain during by frequency sweep raises one's voice
Device voice coil temperature T compares with predetermined temperature threshold.If speaker temperature is during frequency sweep
Exceed predetermined temperature threshold at certain frequency, overall or local can reduce the forward part frequency of this frequency
The driving voltage of point or all frequency, thus the temperature of the speaker during reducing frequency sweep.
In another example, after having adjusted EQ, waiting for a period of time, the temperature of speaker is extensive
Arrive room temperature T again0Time, test according still further to the EQ after adjusting, then compare with predetermined temperature threshold,
So move in circles, until EQ is adjusted to each frequency shift value and reaches maximum displacement, but the temperature of speaker
Degree is less than predetermined temperature threshold.
By the way of this set temperature protection function, it is possible to obtain the temperature of speaker is less than pre-
Driving voltage value during fixed temperature threshold, and apply in the generation of EQ curve calculates.Therefore, may be used
Damage because of overheated in test process with reduction speaker, and ensure the accuracy of test result.
Those skilled in the art is it should be appreciated that Fig. 2 is only for the schematic of temperature protection
Block diagram.Wherein, described unit of testing and controlling 210 can use software, hardware or software and hardware
Combine (such as, computer and audition test software combine) mode realize several functions.
Those skilled in the art should also be as being appreciated that the schematic block diagram shown in Fig. 2 can also be used for
Realize the method according to the invention shown in Fig. 1, wherein it is possible to include that resistance (Rs) 260 is used for
Temperature protection, or test in the case of not including resistance (Rs) 260.
In conjunction with Fig. 1 and Fig. 2, those skilled in the art is easy to, based on disclosure above method, produce
Raw a kind of system for test loudspeaker.This system includes: be used for utilizing laser displacement sensor to examine
The shift value of the test sample product diaphragm of loudspeaker, to reach when the shift value at the different frequent points sample diaphragm of loudspeaker
During to maximum displacement, the module of the corresponding driving voltage required for acquisition sample speaker, such as,
This module can use the part of functions of unit of testing and controlling 210 in Fig. 2 to combine laser displacement sensing
Device 250 realizes；For generating the module of the EQ curve of sample speaker, described EQ curve is sample
The product speaker described driving voltage at different frequent points and the ratio of calibration voltage, such as, this module can
To realize in unit of testing and controlling 210；And for EQ curve based on described sample speaker
Test speaker to be measured with described calibration voltage and obtain the module of test result.
Alternatively, this system also includes: for when the temperature of sample speaker is higher than predetermined temperature
Threshold value time reduce the module of driving voltage of sample speaker.
Alternatively, this system also includes: the displacement for the sample diaphragm of loudspeaker is higher than at certain frequency
The sample speaker module at the driving voltage of this frequency is reduced during predetermined displacement threshold value.
Alternatively, this system also includes: for the temperature when speaker to be measured higher than predetermined temperature threshold
The module of EQ curve is adjusted in real time during value.
Alternatively, this system also includes: be stored as the form of file to treat in test for EQ curve
The module read during surveying speaker.
The method and system for test loudspeaker according to the present invention can improve speaker test
Accuracy, obvious especially for effect for the speaker of application intelligent power amplifier.This is main
Be because when applying intelligent power amplifier, speaker at applicable frequency ranges of operation
Big displacement.
Fig. 3 shows that the displacement to speaker of common power amplifier and intelligent power amplifier promotes
Schematic diagram.
As it is shown on figure 3, wherein, position to speaker during application common power amplifier shown in phantom
Moving and promote, solid line shows the schematic diagram that the displacement of speaker is promoted by intelligent power amplifier.By scheming
3 understand, and for intelligent power amplifier, speaker its shift value in the frequency range of application reaches
To maximum, the frequency range of described application can include resonant frequency range and higher than resonant frequency
One segment limit.Owing to, under big displacement, speaker is easier to enter nonlinear area, produces than little position
More distortion under the conditions of shifting.Therefore, discovery can be easier to according to the method for testing of the present invention raise one's voice
The problem that device is likely to occur in actual applications.
Sample speaker is obtained after the EQ curve of different frequent points by said method, can be based on
The EQ curve obtained and fixed calibration voltage, to test speaker to be measured, such as, are applied
In the test of anechoic chamber or product line.
Fig. 4 is the schematic block diagram of test according to an embodiment of the invention speaker to be measured.
As shown in Figure 4, put including display 410, unit of testing and controlling 420, sound card 430, power
Big device 440, sound treatment circuit 450 and speaker to be measured 460.Wherein, unit of testing and controlling
420 include testing control module 421, test result analysis module 423 and memory module 422.
Described testing control module 421 is used for controlling sound card 430 and sends audio-frequency test signal.Described sound
Card 430 is used for sending audio-frequency test signal, and the audio signal received is converted to digital signal.Institute
State power amplifier 440 to be amplified for the audio signal that sound card is sent.Described acoustic processing electricity
Road 450 sends to sound card after the audio output signal gathering speaker to be measured amplified process.
Described test result analysis module 423 is for collecting and analyze the output audio signal of speaker to be measured.
Described memory module 422 is for storing the record of EQ curve file and test result.
During reality is tested, can anechoic chamber or in speaker is placed on blimp to keep away
Exempt from noise interference.The process that realizes of test includes: testing control module 421 reads from memorizer 422
The EQ curve stored；Testing control module 421 is according to fixed calibration voltage and is read
EQ curve calculates the speaker to be measured driving voltage required for different frequent points；Testing control module
421 pairs of speakers 460 to be measured carry out sweep check and apply corresponding driving voltage；Last test is tied
Fruit is analyzed module 423 and to test result analysis and outputs test result.
Schematic block diagram based on Fig. 4, can realize the survey according to the present invention in unit of testing and controlling 420
Module included by test system.Such as, EQ curve based on described sample speaker and described calibration electricity
Pressure is tested speaker to be measured and obtains the module of test result.Those skilled in the art should manage
Solving, the block diagram of Fig. 4 and the division of module and title are only illustrative, without prejudice to present invention spirit
On the premise of, the implementation of the function of the present invention is not limited.
Although those skilled in the art is it should be appreciated that in the test to sample speaker, adopt
Taken measure make sample speaker operation in maximum displacement, but, owing to the product of actual production is usual
Will not be completely the same, when same EQ curve is applied on different products, may result in this product
Some frequency exceedes predetermined displacement threshold value.Therefore, in the test of actual anechoic chamber or product line,
Actual displacement can also be obtained and the expectation position in the EQ curve applied by displacement transducer etc.
Move and whether be consistent, if be not inconsistent, then according to the feedback adjustment EQ curve of displacement transducer, then based on tune
EQ curve after whole carries out audition test.By this setup, may further ensure that test
Result more can reflect the actual performance of product to be measured.
It will be understood by those of skill in the art that described test unit of testing and controlling 420 can be monolithic
Machine or computer combine test software and realize, and test software can provide man-machine interface with aobvious
Show that device provides operation interface and the result of test exported at display, in order to user is carried out intuitively
Configuration and analysis.
Those skilled in the art are appreciated that if applied the method according to the invention at traditional test
Process, the EQ curve that application obtains adjusts the power amplifier of speaker accordingly at different frequent points
Output voltage, so that the vibrating diaphragm of speaker reaches maximum displacement value as far as possible, is more beneficial for finding speaker
Problem, the beneficially actual application of speaker.Because under big displacement, speaker easily enters
Nonlinear area, thus produce more more distortion than thin tail sheep.
It will be appreciated by those skilled in the art that and can realize unit of testing and controlling by various modes
420.For example, it is possible to realize testing control module 421 and/or test by instruction configuration processor
Interpretation of result module 423.For example, it is possible to instruction is stored in ROM, and when starting the device,
Instruction is read from ROM programming device realizes testing control module 421 and/or test result
Analyze module 423.For example, it is possible to by testing control module 421 and/or test result analysis module 423
It is cured in dedicated devices (such as ASIC).Can be by testing control module 421 and/or test knot
Fruit is analyzed module 423 and is divided into separate unit, or they can be combined realization.
Testing control module 421 and/or test result analysis module 423, can pass through above-mentioned various realization sides
One in formula realizes, or can be by two or more sides in above-mentioned various implementations
The combination of formula realizes.
Referring herein to method according to embodiments of the present invention, the flow chart of device (system) and/or frame
Figure describes various aspects of the invention.Should be appreciated that flow chart and/or each square frame of block diagram and
The combination of each square frame in flow chart and/or block diagram, can be realized by computer-readable program instructions.
These computer-readable program instructions can be supplied to general purpose computer, special-purpose computer or other
The processor of programmable data processing means, thus produce a kind of machine so that these instructions are logical
When crossing the processor execution of computer or other programmable data processing means, create flowchart
And/or the device of the function/action of regulation in the one or more square frames in block diagram.Can also be these
Computer-readable program instructions store in a computer-readable storage medium, these instruction make computer,
Programmable data processing means and/or other equipment work in a specific way, thus, storage has instruction
Computer-readable medium then includes a manufacture, and it includes one in flowchart and/or block diagram
Or the instruction of the various aspects of the function/action of regulation in multiple square frame.
Computer-readable program instructions can also be loaded into computer, other programmable data processes dress
Put or on miscellaneous equipment so that at computer, other programmable data processing means or miscellaneous equipment
Upper execution sequence of operations step, to produce computer implemented process so that computer,
The instruction flowchart performed in other programmable data processing means or miscellaneous equipment and/or block diagram
In one or more square frames in regulation function/action.
Being described above various embodiments of the present invention, described above is exemplary, and exhaustive
Property, and it is also not necessarily limited to disclosed each embodiment.At the model without departing from illustrated each embodiment
Enclose with spirit in the case of, many modifications and changes for those skilled in the art
Will be apparent from.The selection of term used herein, it is intended to explain the former of each embodiment best
Reason, reality are applied or to the technological improvement in market, or are made other ordinary skill of the art
Personnel are understood that each embodiment disclosed herein.The scope of the present invention be defined by the appended claims.
Claims (10)
1. for a method for test loudspeaker, including:
Utilize the shift value of the laser displacement sensor detection sample diaphragm of loudspeaker, with when at different frequent points
When the shift value of the described sample diaphragm of loudspeaker reaches maximum displacement, needed for obtaining described sample speaker
The corresponding driving voltage wanted；
Generating the EQ curve of described sample speaker, described EQ curve is that described sample speaker is not
Described driving voltage and the ratio of calibration voltage with frequency；And
EQ curve based on described sample speaker and described calibration voltage are tested speaker to be measured and obtain
Take test result.
Method the most according to claim 1, also includes: when the temperature of described sample speaker is high
In predetermined temperature threshold time, reduce the driving voltage of described sample speaker.
Method the most according to claim 1, also includes: when the position of the described sample diaphragm of loudspeaker
Move when certain frequency is higher than predetermined displacement threshold value, reduce described sample speaker swashing at this frequency
Encourage voltage.
Method the most according to claim 1, also includes: when the temperature of speaker to be measured is higher than pre-
During fixed temperature threshold, adjust EQ curve in real time.
Method the most according to claim 1, also includes the form that EQ curve is stored as file
To read during testing speaker to be measured.
6. for a system for test loudspeaker, including:
For utilizing the shift value of the laser displacement sensor detection sample diaphragm of loudspeaker with when in difference
The shift value of the sample diaphragm of loudspeaker described in frequency reaches to obtain described sample speaker institute during maximum displacement
The module of the corresponding driving voltage needed；
For generating the module of the EQ curve of described sample speaker, described EQ curve is described sample
The speaker described driving voltage at different frequent points and the ratio of calibration voltage；And
EQ curve based on described sample speaker and described calibration voltage are tested speaker to be measured and obtain
Take the module of test result.
System the most according to claim 6, also includes: for when the temperature of described sample speaker
Spend higher than predetermined temperature threshold time reduce the module of driving voltage of described sample speaker.
System the most according to claim 6, also includes: for the described sample diaphragm of loudspeaker
Displacement reduces described sample speaker swashing at this frequency when certain frequency is higher than predetermined displacement threshold value
Encourage the module of voltage.
System the most according to claim 6, also includes: high for the temperature when speaker to be measured
The module of EQ curve is adjusted in real time when predetermined temperature threshold.
System the most according to claim 6, also includes: for EQ curve is stored as file
Form to test the module read during speaker to be measured.
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| CN201610284759.6A CN105959892B (en) | 2016-04-29 | 2016-04-29 | Method and system for test loudspeaker |
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| CN108040315A (en) * | 2017-10-23 | 2018-05-15 | 广东思派康电子科技有限公司 | A kind of test machine of computer-readable recording medium and the application medium |
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| CN110493691A (en) * | 2019-08-23 | 2019-11-22 | Oppo广东移动通信有限公司 | Abnormal sound detection method, device and electronic equipment |
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| CN116112859B (en) * | 2023-04-13 | 2023-08-18 | 张家港市玉同电子科技有限公司 | Sounding performance evaluation method and system for ceramic loudspeaker |
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