CN107846652A - Diffuser resonant frequency determines devices and methods therefor - Google Patents
Diffuser resonant frequency determines devices and methods therefor Download PDFInfo
- Publication number
- CN107846652A CN107846652A CN201610831259.XA CN201610831259A CN107846652A CN 107846652 A CN107846652 A CN 107846652A CN 201610831259 A CN201610831259 A CN 201610831259A CN 107846652 A CN107846652 A CN 107846652A
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- Prior art keywords
- frequency
- amplitude
- speaker
- drive
- cone
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Classifications
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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 kind of diffuser resonant frequency to determine devices and methods therefor, and the device includes：Frequency generating unit, the signal of generation frequency change are simultaneously amplified to it；Drive the speaker, receive the signal from the output of said frequencies generating unit and the frequency using the cone of loudspeaker as object exporting change；1st displacement transducer, the amplitude variations of above-mentioned drive the speaker when being installed in the position adjacent with above-mentioned drive the speaker and changing to frequency are measured；2nd displacement transducer, the amplitude variations of above-mentioned cone when being installed in the position adjacent with above-mentioned cone and changing to frequency are measured；Amplitude controlling portion, by being controlled to the driving voltage of said frequencies generating unit, the amplitude variations of above-mentioned drive the speaker when frequency is changed are adjusted within particular range；And processing unit, peak point is detected in the amplitude by the above-mentioned cone being measured to from above-mentioned 2nd displacement transducer, determines its resonant frequency.
Description
Technical field
The present invention relates to a kind of diffuser resonant frequency to determine devices and methods therefor, more particularly to one kind can utilize
The diffuser resonant frequency that single drive the speaker is stably measured under all frequency ranges to the resonant frequency of cone
Determine devices and methods therefor.
Background technology
All objects are respectively provided with its resonant frequency, and loudspeaker similarly has intrinsic resonant frequency.
Wherein, the resonant frequency of loudspeaker is determined by the multiple parts used in loudspeaker.
The resonant frequency of loudspeaker is used to determine tonequality and broadcasting frequency scope that loudspeaker is played, therefore is raised in manufacture
It need to be managed during sound device as significant data.And for the resonant frequency management of above-mentioned loudspeaker, most importantly form
Cone in multiple parts of loudspeaker, because the resonant frequency of cone will directly determine the resonant frequency of loudspeaker.Cause
This, it is believed that particularly important during loudspeaker is manufactured is a little resonance frequency to the i.e. cone of one of its component parts
Rate is managed.
Wherein, in order to be measured to the resonant frequency of cone, it is necessary to by from the outside side for applying changeable frequency and shaking
Formula determines the resonant frequency of cone.When reaching the resonant frequency of cone, the vibration amplitude of cone will become maximum, and now
Frequency be cone resonant frequency.
The assay method of cone resonant frequency under prior art is that drive the speaker is placed on into bottom and sends it
Sine wave (sine wave) signal of gradual increased specific voltage from low to high, while by the way that cone is fixed on
State the top of drive the speaker and the vibration amplitude of cone is measured using laser displacement sensor, so that it is determined that it shakes
Amplitude reaches frequency during maximum.
But under above-mentioned prior art, because drive the speaker also has its intrinsic resonant frequency in itself,
When the resonance point of above-mentioned drive the speaker and cone relatively when, will cause to be difficult to survey the resonant frequency of above-mentioned cone
The problem of determining.
In addition, when the resonant frequency of cone is near or below the resonant frequency of drive the speaker, may be because of driving
The excessive shock of loudspeaker and the problem of cause to be difficult to stably to be measured the resonant frequency of cone.
In addition, when cone resonant frequency apparently higher than drive the speaker resonant frequency when, may be raised because of driving
The problem of amplitude during sound device frequency increase reduces and leads to not the vibrations needed for the resonant frequency of generation measure cone.
Therefore in order to solve above-mentioned existing issue, need to be raised one's voice from multiple different drivings according to the frequency range of cone at present
Device.
But even loading identical voltage for multiple drive the speakers, may be because of each drive the speaker institute
The amplitude of generation is of different sizes and causes to be applied to the difference of the amplitude in cone, and therefore causes measured value asking for error occur
Topic.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention
Even if provide a kind of change drive the speaker it is an object of the invention to solve above-mentioned the problems of the prior art
Driving frequency will not also cause the natural resonance of drive the speaker and remain its stable amplitude, so as to using single
The diffuser resonant frequency that individual drive the speaker is stably measured under all frequency ranges to the resonant frequency of cone is surveyed
Determine devices and methods therefor.
The purpose of the present invention is not limited to above-mentioned purpose, and silent other purposes will be recorded by following
One step is clear and definite.
To achieve these goals, make its amplitude big by applying the frequency of change to cone the invention provides a kind of
The small diffuser resonant frequency measure device to change, including：Frequency generating unit, the signal of generation frequency change are simultaneously right
It is amplified；Drive the speaker, receive the signal and defeated as object using the cone of loudspeaker from the output of said frequencies generating unit
Go out the frequency of change；1st displacement transducer, when being installed in the position adjacent with above-mentioned drive the speaker and frequency being changed
The amplitude variations of above-mentioned drive the speaker are measured；2nd displacement transducer, it is installed in the position adjacent with above-mentioned cone simultaneously
The amplitude variations of above-mentioned cone when changing to frequency are measured；Amplitude controlling portion, pass through the drive to said frequencies generating unit
Dynamic voltage is controlled, and the amplitude variations of above-mentioned drive the speaker when frequency is changed are adjusted within particular range；And
Processing unit, peak value (peak) point is detected in the amplitude by the above-mentioned cone being measured to from above-mentioned 2nd displacement transducer, survey
Its fixed resonant frequency.
Preferably, in one or more embodiments, above-mentioned diffuser resonant frequency measure device also includes：Relaying
Portion, it can optionally switch to make above-mentioned 1st displacement transducer or above-mentioned 2nd displacement transducer with above-mentioned amplitude controlling portion connect
The state connect, wherein, when above-mentioned amplitude controlling portion is connected with above-mentioned 1st displacement transducer, by being loaded into above-mentioned driving
Driving voltage in loudspeaker is controlled and its amplitude size is adjusted, and works as above-mentioned amplitude controller and the above-mentioned 2nd
When displacement transducer connects, above-mentioned driving is raised on the basis of the amplitude size for the above-mentioned cone being measured under specific frequency point
The amplitude size of sound device is adjusted.
In addition, to achieve these goals, make it by applying the frequency of change to cone the invention provides a kind of
The assay method for the diffuser resonant frequency that amplitude size changes, including：Step S100, given birth to by frequency generating unit
Into change frequency and apply it in drive the speaker；Step S300, the frequency of change will be applied by above-mentioned steps S100
The amplitude variations of above-mentioned drive the speaker during rate are adjusted in particular range；Step S500, amplitude is exported by object of cone
Scope be adjusted after drive the speaker change frequency；Step S700, to passing through above-mentioned steps S500 exporting changes
The amplitude variations of above-mentioned cone during frequency are measured；And step S900, pass through the amplitude variations data from above-mentioned cone
In detect peak value (peak) point of amplitude, determine its resonant frequency.
Preferably, in one or more embodiments, the amplitude variations of above-mentioned drive the speaker are adjusted to particular range
Interior step S300, including：Step S310, using the 1st displacement transducer to applying the frequency changed by above-mentioned steps S100
When the amplitude variations of above-mentioned drive the speaker be measured；Step S330, it is measured to according to above-mentioned 1st displacement transducer
Amplitude size is controlled to the driving voltage of above-mentioned drive the speaker and its amplitude size is adjusted whereby.
Preferably, in one or more embodiments, the amplitude variations of above-mentioned drive the speaker are adjusted to particular range
Interior step S300, including：Step S320, utilize certain of the 2nd displacement transducer in the frequency of above-mentioned steps S100 change
Individual Frequency point is measured to the amplitude size of above-mentioned cone；Step S340, it is measured to above-mentioned 2nd displacement transducer upper
On the basis of the amplitude size for stating cone, the amplitude size of above-mentioned drive the speaker is adjusted.
By being applicable embodiments of the invention as described above, will not also be made even if the driving frequency of change drive the speaker
Into drive the speaker natural resonance and remain its stable amplitude, so as to using single drive the speaker stably
The resonant frequency of cone is measured under all frequency ranges.
Brief description of the drawings
Fig. 1 is the diffuser resonant frequency measure schematic device for being applicable the embodiment of the present invention.
Fig. 2 is the diffuser resonant frequency assay method block diagram for being applicable the embodiment of the present invention.
Fig. 3 (a) to Fig. 3 (b) is the drive the speaker and paper using prior art and when being applicable various embodiments of the present invention
The amplitude chart comparison schematic diagram of basin.
Embodiment
Advantages and features of the invention and implementation method obtain the embodiment by accompanying drawing and subsequently described in detail
Further clearly.But the invention is not limited in the embodiment illustrated in the following, it can take different a variety of
Form realizes that following embodiments are only used for making disclosed content more complete, and for more completely to this
The those skilled in the art of technical field disclose scope of the invention.In addition, term used in this manual is only used for pair
Embodiment illustrates, and is not the limitation made to the present invention.Unless otherwise indicated, the odd number type description in this specification is gone back
Including complex number type situation.
Below, with reference to accompanying drawing, to being applicable, a preferred embodiment of the present invention will be described in detail.In addition, for this technology
The structure and its effect and effect that the those skilled in the art in field are readily appreciated that, will simplify or omit its related diagram and in detail
Illustrate, only part related to the present invention is described in detail emphatically.
Be applicable the embodiment of the present invention diffuser resonant frequency measure device as shown in figure 1, including：Frequency generating unit
60th, drive the speaker 20, the 1st displacement transducer 30, the 2nd displacement transducer 40, amplitude controlling portion 70 and processing unit 80.
First, frequency generating unit 60 generates the signal of frequency change and by amplification output afterwards to drive the speaker 20
In.
Frequency generating unit 60 as described above, including：Signal generator 62, for generating sine wave (sinewave)；Put
Big device 64, for being amplified to above-mentioned sine wave signal.
In addition, the changeable frequency scope of said frequencies generating unit 60 is 20Hz to 20kHz, belong to the audible frequency model of the mankind
Enclose.
Next, drive the speaker 20 receive said frequencies generating unit 60 output signal after, with loudspeaker
Cone 10 is the frequency of object exporting change.
Drive the speaker 20 as described above, which is usually located at the downside of cone 10 and exported to the direction of above-mentioned cone 10, to be become
The frequency of change.Now, above-mentioned cone 10 will be fixed in and the shape in the supporting table of above-mentioned 20 adjacent installation of drive the speaker
Under state, the frequency of change is made a response.
Next, the 1st displacement transducer 30 is installed in the position adjacent with above-mentioned drive the speaker 20 and frequency is become
The amplitude variations of above-mentioned drive the speaker 20 during change are measured.
Next, when the 2nd displacement transducer 40 is installed in the position adjacent with above-mentioned cone 10 and frequency is changed
The amplitude variations of above-mentioned cone 10 are measured.
40 applicable in general laser displacement gauge of above-mentioned 1st displacement transducer 30 and the 2nd displacement transducer, utilizes laser
The amplitude of drive the speaker when changing to output frequency measures.
, will be next, above-mentioned amplitude controlling portion 70 is to the driving voltage of said frequencies generating unit 60 by being controlled
The amplitude variations of above-mentioned drive the speaker 20 under the frequency of above-mentioned change are adjusted in specific scope.
Wherein, in order that the amplitude of above-mentioned drive the speaker 20 when the output frequency of drive the speaker 20 changes still
It can so keep in a specific range, above-mentioned amplitude controlling portion 70 is formed using AGC (automatic growth control) loop to be advisable.
When the frequency of drive the speaker 20 gradually increases, its amplitude will be gradually reduced, and now above-mentioned amplitude controlling portion 70 will
By confirming to the value measured by the 1st displacement transducer 30, the driving voltage of above-mentioned drive the speaker 20 is improved, so as to
It is set to keep stable amplitude.
That is, when the amplitude when drive the speaker 20 under itself resonance point is more than standard value, amplitude controlling portion will pass through drop
Low driving voltage reduces its amplitude, and when the amplitude of drive the speaker 20 is less than standard value, it will be increased by improving driving voltage
Add its amplitude, so that it remains stable amplitude in all frequency ranges.
Next, detected in the amplitude for the above-mentioned cone 10 that processing unit 80 is measured to from above-mentioned 2nd displacement transducer 40
Go out peak value (peak) point, determine its resonant frequency.
Processing unit 80 as described above includes：Terminal, storage and calculating for data；Display, for show by
State the data message that terminal calculates.I.e., it is possible to use in general computer terminal.
Wherein, the analog signal measured by above-mentioned 2nd displacement transducer 40 will be converted into numeral by A/D conversion regimes
Signal is simultaneously input in processing unit.
Wherein, the amplitude size of drive the speaker 20 will determine the resonant frequency of cone 10, to drive the speaker 20
When amplitude size is corrected, it can be corrected on the basis of the amplitude size of cone 10.
Therefore, it may also include：Relay 50, it can optionally switch to make above-mentioned 1st displacement transducer 30 or above-mentioned
The state that 2nd displacement transducer 40 is connected with above-mentioned amplitude controlling portion 70.
Wherein, when above-mentioned amplitude controlling portion 70 is connected by above-mentioned relay 50 with above-mentioned 1st displacement transducer 30, lead to
Cross and the driving voltage being loaded into above-mentioned drive the speaker 20 is controlled and its amplitude size is adjusted, and when above-mentioned
When amplitude controller 70 is connected by above-mentioned relay 50 with above-mentioned 2nd displacement transducer 40, to be determined under specific frequency point
To above-mentioned cone 10 amplitude size on the basis of the amplitude size of above-mentioned drive the speaker 20 is adjusted.
That is, the amplitude size of the cone 10 under specific frequency point is measured simultaneously by using the 2nd displacement transducer 40
It is corrected by amplitude controlling portion 70, can determine the amplitude size of above-mentioned cone 10, so as to big in identical amplitude all the time
The small lower resonant frequency to cone 10 is measured.
Below, diffuser resonant frequency assay method will be illustrated with reference to Fig. 2.
Be applicable the diffuser resonant frequency assay method of the embodiment of the present invention as shown in Fig. 2 including：Step S100,
The frequency of change is generated by frequency generating unit and applied it in drive the speaker；Step S300, above-mentioned steps will be passed through
The amplitude variations of above-mentioned drive the speaker when S100 applies the frequency of change are adjusted in particular range；Step S500, with paper
Basin is the frequency for the change that object exports the drive the speaker after amplitude range is adjusted；Step S700, to passing through above-mentioned step
The amplitude variations of above-mentioned cone during the frequency of rapid S500 exporting changes are measured；And step S900, by from above-mentioned paper
Peak value (peak) point of amplitude is detected in the amplitude variations data of basin, determines its resonant frequency.
Wherein, the implementation as the step S300 being adjusted to the amplitude variations of above-mentioned drive the speaker in particular range
Example, including：Step S310, using the 1st displacement transducer to applying the above-mentioned drive during frequency changed by above-mentioned steps S100
The amplitude variations of dynamic loudspeaker are measured；Step S330, the amplitude size pair being measured to according to above-mentioned 1st displacement transducer
The driving voltage of above-mentioned drive the speaker is controlled and its amplitude size is adjusted whereby.
In addition, another reality as the step S300 being adjusted to the amplitude variations of above-mentioned drive the speaker in particular range
Example is applied, including：Step S320, utilize some Frequency point of the 2nd displacement transducer in the frequency of above-mentioned steps S100 change
The amplitude size of above-mentioned cone is measured；Step S340, the above-mentioned cone being measured to above-mentioned 2nd displacement transducer
On the basis of amplitude size, the amplitude size of above-mentioned drive the speaker is adjusted.
Result is as shown in Figure 3 compared with the prior art by the present invention illustrated in the above.
Fig. 3 (a) to Fig. 3 (b) is the drive the speaker and paper using prior art and when being applicable various embodiments of the present invention
The amplitude chart comparison schematic diagram of basin.
That is, shown in prior art such as Fig. 3 (a), because the difference between the amplitude of cone and the amplitude of drive the speaker is not
Substantially, it may result in the problem of being difficult to accurately determine cone resonant frequency.
In contrast, the present invention is as shown in Fig. 3 (b), because the difference between the amplitude of cone and the amplitude of drive the speaker
It is different clearly, so the resonant frequency of cone can be accurately determined simply.
By being applicable embodiments of the invention as described above, will not also be made even if the driving frequency of change drive the speaker
Into drive the speaker natural resonance and remain its stable amplitude, so as to using single drive the speaker stably
The resonant frequency of cone is measured under all frequency ranges.
For the ease of understanding the scope of the presently claimed invention that subsequently illustrates, in the above to the feature of the present invention and
Technology has carried out a little more wide in range explanation.Those skilled in the art with the art are not thinking to the technology of the present invention
Want in the case of being changed with essential feature, can be realized by other concrete forms.Therefore the reality illustrated in the above
Apply example and be considered in all respects only as exemplary purpose, be not the restriction made to the present invention.The scope of the present invention is by claim
Book determines rather than described above, derived based on the concept of claims and its equalization to have altered or deformation form is equal
Within the scope of the present invention.
Claims (5)
1. a kind of diffuser resonant frequency determines device, it is characterised in that including：
Frequency generating unit, the signal of generation frequency change are simultaneously amplified to it；
Drive the speaker, receive from the frequency generating unit output signal and using the cone of loudspeaker as object exporting change
Frequency；
1st displacement transducer, driving when being installed in the position adjacent with the drive the speaker and changing to frequency
The amplitude variations of loudspeaker are measured；
2nd displacement transducer, the amplitude of cone when being installed in the position adjacent with the cone and changing to frequency
Change is measured；
Amplitude controlling portion, by being controlled to the driving voltage of the frequency generating unit, driving when frequency is changed
The amplitude variations of loudspeaker are adjusted within particular range；And
Processing unit, peak point is detected in the amplitude by the cone being measured to from the 2nd displacement transducer, determine
Its resonant frequency.
2. diffuser resonant frequency according to claim 1 determines device, it is characterised in that also includes：
Relay, it can optionally switch to make the 1st displacement transducer or the 2nd displacement transducer and the amplitude
The state of control unit connection；
When the amplitude controlling portion is connected with the 1st displacement transducer, by being loaded into the drive the speaker
Driving voltage is controlled and its amplitude size is adjusted；
And when the amplitude controller is connected with the 2nd displacement transducer, described in being measured under specific frequency point
The amplitude size of the drive the speaker is adjusted on the basis of the amplitude size of cone.
3. a kind of assay method of diffuser resonant frequency, including：
Step S100, the frequency of change is generated by frequency generating unit and applied it in drive the speaker；
Step S300, the amplitude variations of drive the speaker when will apply the frequency changed by the step S100 adjust
Into particular range；
Step S500, the change of the drive the speaker after amplitude range is adjusted is exported using the cone of loudspeaker as object
Frequency；
Step S700, the amplitude variations of cone during to frequency by the step S500 exporting changes are measured；
And
Step S900, by detecting the peak point of amplitude from the amplitude variations data of the cone, determine its resonant frequency.
4. diffuser resonant frequency assay method according to claim 3, it is characterised in that
The step S300 amplitude variations of the drive the speaker being adjusted in particular range, including：
Step S310, using the 1st displacement transducer to applying the drive during frequency changed by the step S100
The amplitude variations of dynamic loudspeaker are measured；
Step S330, driving electricity of the amplitude size being measured to according to the 1st displacement transducer to the drive the speaker
Pressure is controlled and its amplitude size is adjusted whereby.
5. diffuser resonant frequency assay method according to claim 3, it is characterised in that
The step S300 amplitude variations of the drive the speaker being adjusted in particular range, including：
Step S320, utilize some Frequency point pair in the frequency of change of the 2nd displacement transducer in the step S100
The amplitude size of the cone is measured；
Step S340, on the basis of the amplitude size for the cone being measured to by the 2nd displacement transducer, to the driving
The amplitude size of loudspeaker is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610831259.XA CN107846652A (en) | 2016-09-19 | 2016-09-19 | Diffuser resonant frequency determines devices and methods therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610831259.XA CN107846652A (en) | 2016-09-19 | 2016-09-19 | Diffuser resonant frequency determines devices and methods therefor |
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| Publication Number | Publication Date |
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| CN107846652A true CN107846652A (en) | 2018-03-27 |
Family
ID=61657265
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| CN201610831259.XA Pending CN107846652A (en) | 2016-09-19 | 2016-09-19 | Diffuser resonant frequency determines devices and methods therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017999A (en) * | 2019-04-12 | 2019-07-16 | 武汉格罗夫氢能汽车有限公司 | A method of test car door resonance |
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| CN204031455U (en) * | 2014-03-26 | 2014-12-17 | 宁波市鄞州腾辰电子有限公司 | A kind of laser vibrating diaphragm FO tester |
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| CN105050018A (en) * | 2015-05-08 | 2015-11-11 | 浙江中科电声研发中心 | Method and system for measuring resonant frequency of loudspeaker part |
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| CN2865179Y (en) * | 2005-12-29 | 2007-01-31 | 宁波东威电子有限公司 | Harmonic frequency tester for loudhailer film |
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Application publication date: 20180327 |