CN105959892B - Method and system for test loudspeaker - Google Patents
Method and system for test loudspeaker Download PDFInfo
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- CN105959892B CN105959892B CN201610284759.6A CN201610284759A CN105959892B CN 105959892 B CN105959892 B CN 105959892B CN 201610284759 A CN201610284759 A CN 201610284759A CN 105959892 B CN105959892 B CN 105959892B
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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
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Abstract
The invention discloses a kind of method and system for test loudspeaker.This method comprises: using the shift value of the laser displacement sensor test sample diaphragm of loudspeaker, to obtain corresponding driving voltage required for sample loudspeaker when the shift value of the different frequent points sample diaphragm of loudspeaker reaches maximum displacement；The EQ curve of sample loudspeaker is generated, the EQ curve is sample loudspeaker in the driving voltage of different frequent points and the ratio of calibration voltage；And EQ curve based on the sample loudspeaker and the calibration voltage test loudspeaker to be measured and obtain test result.It will be applied to according to the method for the present invention in the test macro of loudspeaker actual product, it is easier to the problem of finding loudspeaker to be measured.
Description
Technical field
The present invention relates to electronic component detection techniques, test method and test system more particularly, to a kind of loudspeaker
System.
Background technique
It is an important process in the audition detection of electronic technology field, loudspeaker, and its detection method and detection are set
It is standby to play an important role to test result.With the development of mobile internet, electronic product is increasingly by the favor of user.
Under the trend of electronic product increasingly lightening and high-power, based on intelligent power amplifier being applied in electronic product
Stream.Intelligent power amplifier can adjust in real time its output signal so that loudspeaker reaches as far as possible in applicable frequency range
(in the present invention, displacement refers to the displacement of the vibrating diaphragm of loudspeaker for maximum displacement；Temperature refers to the temperature of loudspeaker voice coil), and be no more than
Scheduled temperature threshold, for example, the maximum temperature of product design.
However, in the prior art, generalling use fixed voltage in the audition test of anechoic chamber or producing line to control
System test signal, thus it is difficult to ensure that loudspeaker is tested under conditions of maximum displacement, this is for using intelligent power
For the application of the loudspeaker of amplifier, it is unfavorable for finding the problem, affects the practical application of loudspeaker.Therefore, how accurately
Speaker performance in the case where test application intelligent power amplifier, becomes the challenge in loudspeaker testing field.
Therefore, it is necessary to improve the prior art to solve the problems, such as at least one above-mentioned.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of loudspeaker test.
According to the first aspect of the invention, a method of for test loudspeaker.This method comprises: utilizing laser displacement
The shift value of the sensor test sample diaphragm of loudspeaker, to reach when the shift value of the sample diaphragm of loudspeaker described in different frequent points
When maximum displacement, corresponding driving voltage required for the sample loudspeaker is obtained；The EQ for generating the sample loudspeaker is bent
Line, the EQ curve are the sample loudspeakers in the driving voltage of different frequent points and the ratio of calibration voltage；And base
Loudspeaker to be measured is tested in the EQ curve of the sample loudspeaker and the calibration voltage and obtains test result.
Preferably, when the temperature of the sample loudspeaker be higher than scheduled temperature threshold when, reduce the sample loudspeaking
The driving voltage of device.
Preferably, when the displacement of the sample diaphragm of loudspeaker some frequency point be higher than scheduled displacement threshold value when, reduce
Driving voltage of the sample loudspeaker in the frequency point.
Preferably, when the temperature of loudspeaker to be measured is higher than scheduled temperature threshold, EQ curve is adjusted in real time.
Preferably, EQ curve is stored as to the form of file to read during testing loudspeaker to be measured.
According to the second aspect of the invention, a kind of system for test loudspeaker is provided.The system includes: for benefit
With the shift value of the laser displacement sensor test sample diaphragm of loudspeaker when the sample diaphragm of loudspeaker described in different frequent points
Shift value reaches the module of corresponding driving voltage required for obtaining the sample loudspeaker when maximum displacement；For generating
The module of the EQ curve of sample loudspeaker is stated, the EQ curve is the driving voltage of the sample loudspeaker in different frequent points
With the ratio of calibration voltage；And EQ curve based on the sample loudspeaker and the calibration voltage test loudspeaker to be measured simultaneously
Obtain the module of test result.
Preferably, the system also includes: for when the sample loudspeaker temperature be higher than scheduled temperature threshold
When reduce the sample loudspeaker driving voltage module.
Preferably, the system also includes: be higher than for the displacement when the sample diaphragm of loudspeaker in some frequency point pre-
The module of driving voltage of the sample loudspeaker in the frequency point is reduced when fixed displacement threshold value.
Preferably, described further include: for being adjusted in real time when the temperature of loudspeaker to be measured is higher than scheduled temperature threshold
The module of EQ curve.
Preferably, the system also includes: be stored as the form of file for EQ curve to test loudspeaker to be measured
The module read in the process.
Method and system according to the present invention for test loudspeaker can make loudspeaker to be measured during the test
Reach maximum displacement in its applying frequency range intrinsic displacement value, to be conducive to the problem of finding product.In addition, in test process
In, it can also be ensured that the shift value and temperature of loudspeaker are no more than scheduled threshold value, thus avoid damaging loudspeaker to be measured and/or
Influence the accuracy of test.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the flow chart of the method according to an embodiment of the present invention for test loudspeaker.
Fig. 2 is the schematic block diagram according to an embodiment of the present invention for temperature protecting method.
Fig. 3 is the displacement diagram of the diaphragm of loudspeaker using intelligent power amplifier and common power amplifier.
Fig. 4 is the schematic block diagram of test loudspeaker to be measured according to an embodiment of the invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
Fig. 1 is the flow chart of the method according to an embodiment of the present invention for test loudspeaker.
As shown in Figure 1, test method according to the present invention is broadly divided into two stages.First stage raises for test sample
Sound device simultaneously obtains EQ curve, including step S110 and S120.Second stage is that the EQ curve of sample loudspeaker is applied to noise reduction
In room test or production line test, including step S130.
In step S110, using the shift value of the laser displacement sensor test sample diaphragm of loudspeaker, when in different frequencies
When the shift value of the point sample diaphragm of loudspeaker reaches maximum displacement, driving voltage required for sample loudspeaker is obtained.
In general, the audition test of loudspeaker includes setting swept frequency range, surveyed in swept frequency range using driving voltage control
The broadcasting of audio signal (for example, sine wave signal) is tried, to obtain test result of the loudspeaker in swept frequency range.In general, institute
The swept frequency range stated is set as the applicable frequency range of loudspeaker, for example, in the case where resonance frequency is 1.0kHz, it will
Swept frequency range is set as 100Hz-1.2kHz.
Those skilled in the art it should be appreciated that the loudspeaker can applying frequency range it is related with Multiple factors, example
Such as, the output voltage for the power amplifier being connect with loudspeaker or the temperature of loudspeaker are related.The present invention is for loudspeaker
Applying frequency range is not specifically limited, and tester needs to be determined according to the actual situation.
The laser displacement sensor emits laser pulse signal, returns to the sensor after the scattering of the vibrating diaphragm of loudspeaker,
The sensor can measure the displacement (amplitude) of the diaphragm of loudspeaker according to the time of laser pulse emission and return.By using
Laser displacement sensor can be with the shift value of non-contacting test loudspeaker, and measuring accuracy is up to 1um.
In the present embodiment, when the shift value of the different frequent points sample diaphragm of loudspeaker reaches maximum displacement, sample is obtained
Corresponding driving voltage required for product loudspeaker.In addition, may be repeated as many times in the process of test sample loudspeaker to obtain
The attainable maximum displacement of institute under different driving voltages of sample loudspeaker.
The maximum displacement of the loudspeaker includes positive maximum displacement or negative maximum displacement or the direct current of the diaphragm of loudspeaker
Offset.For example, positive maximum displacement is 0.27mm, negative maximum displacement is -0.25mm etc..User is in test sample loudspeaker
It can according to need the driving voltage obtained in any of the above-described kind of situation or a variety of situations respectively in the process.
In addition, whether temperature or the displacement that can monitor loudspeaker are high during testing sample loudspeaker
In scheduled threshold value, to reduce driving voltage accordingly, to avoid sample loudspeaker shadow due to temperature is excessively high or displacement is excessive
Ring the accuracy of test.
For example, reducing sample when the displacement of the sample diaphragm of loudspeaker is higher than scheduled displacement threshold value on some frequency point
Driving voltage of the loudspeaker in frequency point.
For example, when the temperature of sample loudspeaker be higher than scheduled temperature threshold when, reduce sample loudspeaker excitation electricity
Pressure.The driving voltage of sample loudspeaker can be reduced using various ways, for example, reducing excitation electricity according to certain step-length
Pressure.For example, reducing the frequency point before all when the temperature for detecting sample loudspeaker is when some frequency point is higher than scheduled threshold value
The driving voltage of frequency point or part frequency point.It is therefore the slow process become and accumulate reduces all this is mainly due to temperature change
The driving voltage of frequency point or part frequency point is more able to reflect the change procedure of temperature.
It can guarantee to obtain accurate test result by way of above-mentioned reduction driving voltage, while avoid damaging
Bad loudspeaker.
The EQ curve of sample loudspeaker is generated according to the test result of step S110 in step S120, the EQ curve is
Sample loudspeaker is in the driving voltage of different frequent points and the ratio of calibration voltage.
The calibration voltage can be determined as, for example, in maximum driving voltage, swept frequency range corresponding to any frequency point
Driving voltage needs to select driving voltage corresponding to a certain frequency point according to test.Frequency point corresponding with calibration voltage is in this hair
It is known as calibration frequency point in bright.
It will be understood by those of skill in the art that the EQ curve can be shown in the form of gain (dB value).Pass through
This mode can intuitively show driving voltage relative to the changing value of calibration voltage and/or the essence of raising data record
Degree.
The EQ curve can also be stored as the form of file, in this way, can use software or other methods
Real-time display calls the EQ curve, for the test of producing line or anechoic chamber.It is not tested in addition, being also beneficial to fit
The driving voltage value of the frequency point of examination, to obtain the complete EQ curve in swept frequency range.
In step S130, EQ curve and the calibration voltage based on the sample loudspeaker are tested loudspeaker to be measured and are obtained
Take test result.
In step s 130, loudspeaker to be measured is arranged according to the calibration voltage determined in step S120 is calibrating frequency point
Driving voltage.And the driving voltage of other frequency points in swept frequency range is recovered according to EQ curve, for playing audio-frequency test letter
Number to obtain the audition test result of loudspeaker to be measured.
Those skilled in the art should be appreciated that during testing loudspeaker to be measured, for swept frequency range, frequency
Interval etc. can be set can be consistent with sample loudspeaker.And the design phase of loudspeaker to be measured and sample loudspeaker
Seemingly, to guarantee the EQ curve and the calibration voltage that effectively utilize sample loudspeaker to obtain loudspeaker to be measured more accurately
Test result.
During testing loudspeaker to be measured, it is also possible to the excessively high situation of temperature occur.Therefore, in step
It can also include adjusting EQ curve in real time when loudspeaker to be measured is when some frequency point is higher than scheduled temperature threshold in S130
Function.
In this way, it can be damaged to avoid loudspeaker to be measured because temperature is excessively high.In addition, carrying out during the test
Adjustment can correct EQ curve in time to guarantee the test accuracy of loudspeaker to be measured in real time.
The test result includes being able to reflect the parameter of loudspeaker tonequality performance to be measured.For example, total harmonic distortion, high order
Harmonic distortion, intermodulation distortion and frequency response etc..In general, tester judged according to scheduled standard product whether conjunction
Lattice, for example, being compared according to total harmonic distortion value or intermodulation distortion with scheduled standard, if it is greater than scheduled standard, then
Think that product is unqualified.
Fig. 2 is the schematic block diagram of the method according to an embodiment of the present invention for temperature protection.
As shown in Fig. 2, include unit of testing and controlling 210, sound card 220, power amplifier 230, sample loudspeaker 240 and
Laser sensor 250.
Shift value of the laser sensor 250 for the vibrating diaphragm of test sample loudspeaker.The sound card 220 is for exporting
Audio-frequency test signal within the scope of swept frequency.The power amplifier 230 is used for the audio-frequency test signal exported to sound card 220
It amplifies, to push the vibrating diaphragm of sample loudspeaker to generate displacement.The unit of testing and controlling 210 is for collecting laser displacement biography
Shift value of the sample loudspeaker that sensor 250 is fed back within the scope of swept frequency, and when shift value reaches maximum displacement
Record the corresponding driving voltage of sample loudspeaker.
In the present embodiment, unit of testing and controlling 210 is also used to generate the driving voltage for playing audio-frequency test signal.Test
Sample loudspeaker can also be generated EQ curve in the relationship of different frequent points driving voltage and calibration voltage by control unit 210.
The temperature protecting method of sample loudspeaker is specific as follows:
Firstly, unit of testing and controlling 210 other than generating swept-frequency signal, can also be superimposed a low frequency (for example, small again
In 50Hz) parallel signal, and the output amplitude of the parallel signal is very low relative to normal audio-frequency test signal, to production
The contribution of product vibration displacement and fever can be ignored.
Secondly, calculating the temperature of sample loudspeaker.Feedback of the unit of testing and controlling 210 in addition to acquiring laser displacement sensor
Except displacement, the signal at 260 both ends of resistance (Rs) can also be acquired, and be filtered to the signal, only retain parallel signal frequency
Rate calculates its amplitude, it is believed that thus obtained voltage URsVoltage when direct current signal, test control are exported for power amplifier
Unit processed 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
Unit 210 controls, it is believed that is known quantity.
According to conditions above, the direct current resistance R of sample loudspeaker can be calculated.The temperature coefficient of resistance of loudspeaker voice coil under room temperature
α is known quantity, according to the available current voice coil temperature of temperature coefficient of resistance calculation formula:
Wherein, R0For loudspeaker room temperature T0Under direct current resistance, this same T before testing0It measures and records together.
Finally, adjusting driving voltage or EQ curve according to the real time temperature of the sample loudspeaker of acquisition.For example, test control
Unit 210 processed carries out sweep check, the loudspeaker voice coil temperature T obtained when by frequency sweep and scheduled temperature threshold according to current EQ
It is compared.If loudspeaker temperature is more than scheduled temperature threshold in some frequency point during frequency sweep, can whole or office
The driving voltage of part frequency point or whole frequency points before portion reduces the frequency point, thus the temperature of the loudspeaker during reducing frequency sweep
Degree.
In another example, it after having adjusted EQ, waits for a period of time, the temperature of loudspeaker is restored to room temperature T0When,
It is tested according still further to EQ adjusted, then compared with scheduled temperature threshold, is looped back and forth like this, until EQ is adjusted to each frequency
Point shift value reaches maximum displacement, but the temperature of loudspeaker is no more than scheduled temperature threshold.
By way of this set temperature protection function, the temperature that can obtain loudspeaker is no more than scheduled temperature threshold
Driving voltage value when value, and apply in the generation of EQ curve calculates.Therefore, can reduce loudspeaker during the test because
It overheats and damages, and guarantee the accuracy of test result.
Those skilled in the art is it should be appreciated that Fig. 2 is only for the schematical block diagram of temperature protection.Wherein,
The unit of testing and controlling 210 can be combined using software, hardware or software with hardware (for example, computer and audition are surveyed
Examination software combination) mode realize multiple functions.
Those skilled in the art should also be as it is appreciated that schematic block diagram shown in Fig. 2 can also be used for realizing shown in Fig. 1
According to the method for the present invention, wherein may include resistance (Rs) 260 for temperature protection, or do not including resistance (Rs)
It is tested in the case where 260.
Those skilled in the art is easy to generate a kind of for surveying based on disclosure above method combined with Figure 1 and Figure 2,
The system for trying loudspeaker.The system includes: the shift value for utilizing the laser displacement sensor test sample diaphragm of loudspeaker, with
When the shift value of the different frequent points sample diaphragm of loudspeaker reaches maximum displacement, obtain corresponding required for sample loudspeaker
The module of driving voltage, for example, the module can be using the part of functions combination laser position of unit of testing and controlling 210 in Fig. 2
Displacement sensor 250 is realized；For generating the module of the EQ curve of sample loudspeaker, the EQ curve is sample loudspeaker not
With the driving voltage of frequency point and the ratio of calibration voltage, for example, the module can be come in fact in unit of testing and controlling 210
It is existing；And for EQ curve and calibration voltage test loudspeaker to be measured based on the sample loudspeaker and obtain test knot
The module of fruit.
Optionally, the system further include: for when the temperature of sample loudspeaker be higher than scheduled temperature threshold when drop
The module of the driving voltage of low sample loudspeaker.
Optionally, system further include: the displacement for the sample diaphragm of loudspeaker is higher than scheduled displacement in some frequency point
Sample loudspeaker is reduced when threshold value in the module of the driving voltage of the frequency point.
Optionally, system further include: for being adjusted in real time when the temperature of loudspeaker to be measured is higher than scheduled temperature threshold
The module of whole EQ curve.
Optionally, system further include: be stored as the form of file in the mistake for testing loudspeaker to be measured for EQ curve
The module read in journey.
Method and system according to the present invention for test loudspeaker can be improved the accuracy of loudspeaker test, especially
It is that effect is obvious for the loudspeaker of application intelligent power amplifier.This is primarily due to applying intelligent power amplifier
When, loudspeaker is in applicable frequency ranges of operation in maximum displacement.
Fig. 3 shows common power amplifier and the displacement to loudspeaker of intelligent power amplifier pushes schematic diagram.
As shown in Figure 3, wherein dotted line, which is shown, pushes the displacement of loudspeaker using when common power amplifier, solid line
Show the schematic diagram that intelligent power amplifier pushes the displacement of loudspeaker.As shown in Figure 3, intelligent power amplifier is come
It says, loudspeaker its shift value in the frequency range of application reaches maximum value, and the frequency range of the application may include resonance frequency
Rate range and a segment limit higher than resonance frequency.Since under big displacement, loudspeaker is easier to enter nonlinear area, produce
Life under the conditions of thin tail sheep than being more distorted.Therefore, test method according to the present invention can be easier discovery loudspeaker in reality
The problem of being likely to occur in the application of border.
Sample loudspeaker is obtained after the EQ curve of different frequent points by the above method, it can be bent based on EQ obtained
Line and fixed calibration voltage test loudspeaker to be measured, for example, applying in the test of anechoic chamber or producing line.
Fig. 4 is the schematic block diagram of test loudspeaker to be measured according to an embodiment of the invention.
As shown in figure 4, at including display 410, unit of testing and controlling 420, sound card 430, power amplifier 440, sound
Manage circuit 450 and loudspeaker to be measured 460.Wherein, unit of testing and controlling 420 includes testing control module 421, test result point
Analyse module 423 and memory module 422.
The testing control module 421 issues audio-frequency test signal for controlling sound card 430.The sound card 430 is for sending out
Audio-frequency test signal out, and the audio signal received is converted into digital signal.The power amplifier 440 is used to send out sound card
Audio signal out amplifies.The sound treatment circuit 450 is used to acquire the audio output signal and warp of loudspeaker to be measured
Sound card is sent to after enhanced processing.The test result analysis module 423 is used to collect and analyze the output sound of loudspeaker to be measured
Frequency signal.The memory module 422 is used to store the record of EQ curve file and test result.
During actual test, it can be done in anechoic chamber or loudspeaker is placed in blimp to avoid noise
It disturbs.Test the realization process includes: testing control module 421 reads stored EQ curve from memory 422；Testing and control mould
Required for block 421 calculates loudspeaker to be measured in different frequent points according to fixed calibration voltage and read EQ curve
Driving voltage；Testing control module 421 carries out sweep check to loudspeaker 460 to be measured and applies corresponding driving voltage；Finally
Test result analysis module 423 is to test result analysis and outputs test result.
Schematic block diagram based on Fig. 4 may be implemented included by test macro according to the present invention in unit of testing and controlling 420
Module.For example, EQ curve and the calibration voltage based on the sample loudspeaker test loudspeaker to be measured and obtain test
As a result module.Those skilled in the art is it should be appreciated that the block diagram of Fig. 4 and the division of module and title are only schematic
, on the premise of without prejudice to spirit of the invention, the implementation of function of the invention is not limited.
It should be appreciated that although in the test to sample loudspeaker, the measure of taking makes those skilled in the art
Sample speaker operation is in maximum displacement, however, since the product of actual production usually will not be completely the same, same EQ curve
When being applied on different products, it may result in the certain frequency points of the product more than scheduled displacement threshold value.Therefore, actual
In the test of anechoic chamber or producing line, it can also be obtained in actual displacement and applied EQ curve by displacement sensor etc.
It is expected that whether displacement is consistent, if be not inconsistent, according to the feedback adjustment EQ curve of displacement sensor, then based on the EQ after adjustment
Curve carries out audition test.By this setup, may further ensure that test result more can reflect the reality of product to be measured
Border performance.
It will be understood by those of skill in the art that the test unit of testing and controlling 420 can be single-chip microcontroller or computer
Binding test software realizes, test software can provide man-machine interface to provide operation interface in display and will test
Result display export, in order to which user intuitively configures and analyzes.
Those skilled in the art are appreciated that the application if process in traditional test will be applied according to the method for the present invention
The EQ curve of acquisition to adjust output voltage of the power amplifier in different frequent points of loudspeaker accordingly, so that the vibration of loudspeaker
The problem of film reaches maximum displacement value as far as possible, is more advantageous to discovery loudspeaker, be conducive to the practical application of loudspeaker.Because big
Under displacement, loudspeaker easily enters nonlinear area, to generate distortions more more than thin tail sheep.
It will be appreciated by those skilled in the art that unit of testing and controlling 420 can be realized by various modes.For example, can
To realize testing control module 421 and/or test result analysis module 423 by instruction configuration processor.For example, can incite somebody to action
Instruction is stored in the ROM, and when starting the device, and instruction is read in programming device from ROM and realizes testing and control
Module 421 and/or test result analysis module 423.For example, can be by testing control module 421 and/or test result analysis mould
Block 423 is cured in dedicated devices (such as ASIC).It can be by testing control module 421 and/or test result analysis module 423
It is divided into mutually independent unit, or they can be merged to realization.Testing control module 421 and/or test result
Analysis module 423 can be realized by one of above-mentioned various implementations, or can pass through above-mentioned various realization sides
The combinations of two or more modes in formula is realized.
Referring herein to according to the method for the embodiment of the present invention, the flowchart and or block diagram of device (system) describe this hair
Bright various aspects.It should be appreciated that each box in each box and flowchart and or block diagram of flowchart and or block diagram
Combination, 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 programmable datas
The processor of processing unit, so that a kind of machine is produced, so that these instructions are passing through computer or other programmable datas
When the processor of processing unit executes, function specified in one or more boxes in implementation flow chart and/or block diagram is produced
The device of energy/movement.These computer-readable program instructions can also be stored in a computer-readable storage medium, these refer to
It enables so that computer, programmable data processing unit and/or other equipment work in a specific way, thus, it is stored with instruction
Computer-readable medium then includes a manufacture comprising in one or more boxes in implementation flow chart and/or block diagram
The instruction of the various aspects of defined function action.
Computer-readable program instructions can also be loaded into computer, other programmable data processing units or other
In equipment, so that series of operation steps are executed in computer, other programmable data processing units or other equipment, to produce
Raw computer implemented process, so that executed in computer, other programmable data processing units or other equipment
Instruct function action specified in one or more boxes in implementation flow chart and/or block diagram.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In principle, the practical application or to the technological improvement in market for best explaining each embodiment, or make the art its
Its those of ordinary skill can understand each embodiment disclosed herein.The scope of the present invention is defined by the appended claims.
Claims (10)
1. a kind of method for test loudspeaker, comprising:
Using the shift value of the laser displacement sensor test sample diaphragm of loudspeaker, when the sample loudspeaker described in different frequent points
When the shift value of vibrating diaphragm reaches maximum displacement, corresponding driving voltage required for the sample loudspeaker is obtained；
The EQ curve of the sample loudspeaker is generated, the EQ curve is the excitation of the sample loudspeaker in different frequent points
The ratio of voltage and calibration voltage；And
EQ curve and the calibration voltage based on the sample loudspeaker test loudspeaker to be measured and obtain test result.
2. according to the method described in claim 1, further include: when the temperature of the sample loudspeaker is higher than scheduled temperature threshold
When, reduce the driving voltage of the sample loudspeaker.
3. according to the method described in claim 1, further include: when the displacement of the sample diaphragm of loudspeaker is higher than in some frequency point
When scheduled displacement threshold value, the sample loudspeaker is reduced in the driving voltage of the frequency point.
4. according to the method described in claim 1, further include: when the temperature of loudspeaker to be measured is higher than scheduled temperature threshold,
Adjustment EQ curve in real time.
5. according to the method described in claim 1, further including that EQ curve is stored as to the form of file to test loudspeaking to be measured
It is read during device.
6. a kind of system for test loudspeaker, comprising:
For the shift value using the laser displacement sensor test sample diaphragm of loudspeaker to be raised when the sample described in different frequent points
The shift value of sound device vibrating diaphragm reaches the module of corresponding driving voltage required for obtaining the sample loudspeaker when maximum displacement；
For generating the module of the EQ curve of the sample loudspeaker, the EQ curve is the sample loudspeaker in different frequent points
The driving voltage and calibration voltage ratio；And
EQ curve and the calibration voltage based on the sample loudspeaker test loudspeaker to be measured and obtain the mould of test result
Block.
7. system according to claim 6, further includes: be higher than scheduled temperature for the temperature when the sample loudspeaker
Degree threshold value when reduce the sample loudspeaker driving voltage module.
8. system according to claim 6, further includes: the displacement for the sample diaphragm of loudspeaker is in some frequency point height
The module of driving voltage of the sample loudspeaker in the frequency point is reduced when scheduled displacement threshold value.
9. system according to claim 6, further includes: be higher than scheduled temperature threshold for the temperature when loudspeaker to be measured
When adjust the module of EQ curve in real time.
10. system according to claim 6, further includes: for EQ curve is stored as the form of file with test to
The module read during surveying loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284759.6A CN105959892B (en) | 2016-04-29 | 2016-04-29 | Method and system for test loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610284759.6A CN105959892B (en) | 2016-04-29 | 2016-04-29 | Method and system for test loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105959892A CN105959892A (en) | 2016-09-21 |
| CN105959892B true CN105959892B (en) | 2019-06-04 |
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| CN106954169B (en) * | 2017-03-21 | 2020-02-14 | 深圳市信维声学科技有限公司 | Noise testing method and system for acoustic product |
| 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 |
| CN108462930B (en) * | 2017-12-19 | 2020-09-04 | 深圳市豪恩声学股份有限公司 | Earphone diaphragm compression-resistant test system, method and computer storage medium |
| US11272301B2 (en) * | 2019-01-10 | 2022-03-08 | Parts Express International, Inc. | Measuring loudspeaker nonlinearity and asymmetry |
| 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 |
| CN111479198B (en) * | 2020-04-09 | 2021-11-12 | 维沃移动通信有限公司 | Audio signal processing method and electronic equipment |
| 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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