CN106303883A - A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer - Google Patents
A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer Download PDFInfo
- Publication number
- CN106303883A CN106303883A CN201610707086.0A CN201610707086A CN106303883A CN 106303883 A CN106303883 A CN 106303883A CN 201610707086 A CN201610707086 A CN 201610707086A CN 106303883 A CN106303883 A CN 106303883A
- Authority
- CN
- China
- Prior art keywords
- voice coil
- capacitance
- height
- displacement
- loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
- H04R29/003—Monitoring arrangements; Testing arrangements for loudspeakers of the moving-coil type
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses and a kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer, the method includes: voice coil loudspeaker voice coil is when equilbrium position, and the capacitance of the capacitor constituted between detection voice coil loudspeaker voice coil and the magnetic circuit system of speaker, as the first capacitance；Detection voice coil vibrations is to the capacitance of capacitor during another location, as the second capacitance；Detection voice coil loudspeaker voice coil just difference in height to magnetic circuit system when another location and equilbrium position；Detection voice coil vibrations is to the capacitance of capacitor during current location, as current capacitance；According to the first capacitance, the second capacitance, difference in height and current capacitance, it is calculated the vibration displacement of voice coil loudspeaker voice coil.The capacitance of the present invention capacitor by being formed between detection voice coil loudspeaker voice coil and magnetic circuit system in real time, monitors the vibration displacement of voice coil loudspeaker voice coil, in this way it is easier to realize, and can evade polarization and the distortion that vibration imbalance causes.
Description
Technical field
The present invention relates to speaker field, more particularly it relates to an detection loudspeaker voice coil vibration displacement
Method, device and loudspeaker monomer.
Background technology
In the mobile interchange epoch, consumer electronics product increasingly favored, and substantial amounts of smart machine occurs in the day of people
Often in life.Speaker, as a kind of microphone device, is widely used in consumption electronic product.The most common speaker master
Coil-moving speaker to be had, electromagnetic loudspeaker, condenser loudspeaker, piezo-electric loudspeaker etc., coil-moving speaker has because of it
Have that making is relatively easy, with low cost, have the features such as preferable low frequency sounding advantage, and extensively applied.But it is light at equipment
Thinning, high-power trend under, power amplifier exports to the power of speaker more and more higher, and loudspeaker vibration displacement also becomes more
Greatly, whether accurate from being largely fixed the distortion of speaker, sense of hearing and service life to amplitude controlling.Find suitably
The displacement of method monitoring speaker becomes the problem needing solution badly.
Existing power amplifier technology, by testing the displacement model obtained in advance, predicts loudspeaker vibration position according to music signal
Shifting amplitude, uses the method for positive feedback (feedforward) that speaker is carried out displacement monitoring.This technology has the disadvantage in that
A) displacement model obtains according only to a small amount of sample modeling, and the model of actually every product there are differences.
B) product is in use it may happen that performance change, the tracking that product parameters is changed by this technology, only relies on
The impedance data that V-I Sense obtains, not accurate enough.
C) displacement is prediction data, with actual and not quite identical, if displacement model does not conforms to the actual conditions, can strengthen pre-
Survey error.
D) because displacement protection exists error, need time the most actually used to strengthen displacement protection surplus, thus limit
Speaker output and the performance of performance.
Existing speaker protection scheme is to add on one layer of electret layer, with metal shell in speaker top dome portion
Lid constitutes plane-parallel capacitor, by monitoring the capacitance of this electric capacity, thus is calculated diaphragm oscillations change in displacement.But the party
Case has the disadvantage in that
The top dome portion processing technique comprising electret layer is complicated, is difficult to realize；
Realizing complex process from electret layer lead-in wire, production cost is high；
Electret layer lead-in wire causes top dome portion vibration imbalance, produces polarization and additional distortion.
Summary of the invention
It is an object of the present invention to provide the new solution of a kind of accurate detection loudspeaker displacement.
According to the first aspect of the invention, it is provided that a kind of method detecting loudspeaker voice coil vibration displacement, including:
Detect the electric capacity that described voice coil loudspeaker voice coil is constituted when equilbrium position, between described voice coil loudspeaker voice coil and the magnetic circuit system of described speaker
The capacitance of device, as the first capacitance；
Detect the described voice coil vibrations capacitance to capacitor described during another location, as the second capacitance；
Detect described voice coil loudspeaker voice coil just difference in height to described magnetic circuit system when described another location and described equilbrium position；
Detect the described voice coil vibrations capacitance to capacitor described during current location, as current capacitance；
According to described first capacitance, described second capacitance, described difference in height and described current capacitance, it is calculated described sound
The current vibration displacement of circle.
Optionally, the described voice coil loudspeaker voice coil of described detection when described another location and described equilbrium position just to described magnetic circuit system
System difference in height particularly as follows:
Detect described voice coil loudspeaker voice coil just height to described magnetic circuit system when described initial position and obtain the first height；
Detect described voice coil loudspeaker voice coil just height to described magnetic circuit system when described another location and obtain the second height；
Calculate the difference of described second height and described first height as described difference in height.
Optionally, described method also includes:
Described vibration displacement is moved with the reference bit of corresponding ongoing frequency in the displacement model of described speaker and compares,
If the difference between described vibration displacement and described reference displacement exceedes setting value, then by the reference of corresponding described current capacitance
Displacement replaces with described vibration displacement.
According to the second aspect of the invention, it is provided that a kind of device detecting loudspeaker voice coil vibration displacement, including:
First detection module, for detecting described voice coil loudspeaker voice coil when equilbrium position, the magnetic circuit of described voice coil loudspeaker voice coil and described speaker
The capacitance of the capacitor constituted between system, as the first capacitance；Detect described voice coil vibrations to electric capacity described during another location
The capacitance of device, as the second capacitance；
Height detection module, is used for detecting described voice coil loudspeaker voice coil when described another location and described equilbrium position just to described magnetic
The difference in height of road system；
Second detection module, for detecting the described voice coil vibrations capacitance to capacitor described during current location, as working as
Front capacitance；And,
Computing module, is used for according to described first capacitance, described second capacitance, described difference in height and described current capacitance,
It is calculated the current vibration displacement of described voice coil loudspeaker voice coil.
Optionally, described height detection module includes:
First height detection unit, for detecting described voice coil loudspeaker voice coil just height to described magnetic circuit system when described initial position
Degree obtains the first height；
Second height detection unit, for detecting described voice coil loudspeaker voice coil just height to described magnetic circuit system when the described second position
Degree obtains the second height；
Difference in height computing unit, for calculating the difference of described second height and described first height as described height
Difference.
Optionally, described device also includes:
Comparison module, for by described vibration displacement and the reference of corresponding ongoing frequency in the displacement model of described speaker
Displacement compares；
Replacement module, if exceeding setting value for the difference between described vibration displacement and described reference displacement, then will
The reference displacement of corresponding described current capacitance replaces with described vibration displacement.
According to the third aspect of the invention we, it is provided that a kind of loudspeaker monomer, including aforementioned detection loudspeaker voice coil displacement
Device.
According to the fourth aspect of the invention, it is provided that a kind of loudspeaker monomer, including the voice coil loudspeaker voice coil with described loudspeaker monomer
The second connecting line, capacitive detection circuit and the position that the first connecting line connected is connected with the magnetic circuit system of described loudspeaker monomer
Moving counting circuit, described capacitive detection circuit is arranged to detect the appearance between described first connecting line and described second connecting line
Value, described displacement counting circuit is arranged by described capacitance and calculates the vibration displacement of described loudspeaker monomer voice coil loudspeaker voice coil.
Optionally, during described magnetic circuit system includes frame, Magnet and washer at least one.
Optionally, described loudspeaker monomer is coil-moving speaker.
It was found by the inventors of the present invention that in the prior art, have that processing technique is complicated, be difficult to realize, manufacturing cost is high,
The problem being easily generated polarization and additional distortion.In embodiments of the invention, by shape between detection voice coil loudspeaker voice coil and magnetic circuit system in real time
The capacitance of capacitor become, the vibration displacement of monitoring voice coil loudspeaker voice coil, in this way it is easier to realize, and can evade that vibration imbalance causes inclined
Shake and distortion.Therefore, the present invention is to be realized technical assignment or to be solved technical problem is that those skilled in the art
Never that expect or it is not expected that, therefore the present invention is a kind of new technical scheme.
By detailed description to the exemplary embodiment of the present invention referring to the drawings, the further feature of the present invention and
Advantage will be made apparent from.
Accompanying drawing explanation
Combined in the description and the accompanying drawing of the part that constitutes description shows embodiments of the invention, and even
With its explanation together for explaining the principle of the present invention.
Fig. 1 is the cross-sectional view of existing speaker；
Fig. 2 is the flow process of a kind of embodiment according to a kind of method detecting loudspeaker voice coil vibration displacement of the present invention
Figure；
Fig. 3 is that to implement the square frame of structure according to a kind of device detecting loudspeaker voice coil vibration displacement of the present invention a kind of former
Reason figure；
Fig. 4 is the another kind of square frame implementing structure according to a kind of device detecting loudspeaker voice coil vibration displacement of the present invention
Schematic diagram；
Fig. 5 is the cross-sectional view of a kind of embodiment according to a kind of loudspeaker monomer of the present invention.
Description of reference numerals:
1-voice coil loudspeaker voice coil；2-frame；
3-Magnet；4-washer；
5-the first connecting line；6-the second connecting line；
U1-capacitance test circuit；U2-displacement counting circuit.
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 additionally have
Body illustrates, the parts illustrated the most in these embodiments and positioned opposite, the numerical expression of step and numerical value are not intended to this
The scope of invention.
Description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And any restriction applied or use.
May be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of when, described technology, method and apparatus should be considered a part for description.
It is shown here that any occurrence should be construed as merely exemplary with in all examples discussed, and not
It is as restriction.Therefore, other example of exemplary embodiment can have different values.
It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing
Individual accompanying drawing is defined, then need not it is further discussed in accompanying drawing subsequently.
In order to solve to monitor present in prior art that the speaker processing technique of voice coil loudspeaker voice coil displacement is complicated, be difficult to realize, raw
Become that cost is high, be easily generated polarization and the problem of additional distortion, the invention provides a kind of loudspeaker voice coil vibration displacement that detects
Method, device and loudspeaker monomer.
The present invention detect loudspeaker voice coil vibration displacement method and device can but be not limited to be applied to moving-coil type and raise
Sound device, as it is shown in figure 1, coil-moving speaker includes voice coil loudspeaker voice coil 1 and the magnetic circuit system driving diaphragm oscillations, wherein magnetic circuit system includes
Frame 2, Magnet 3 and washer 4, and whether accurate the amplitude controlling of the diaphragm of loudspeaker and voice coil loudspeaker voice coil 1 is raises from being largely fixed
The distortion of sound device, sense of hearing and service life.
Fig. 2 is the flow process of a kind of embodiment according to a kind of method detecting loudspeaker voice coil vibration displacement of the present invention
Figure.
As in figure 2 it is shown, comprise the steps:
Step S201, voice coil loudspeaker voice coil, when equilbrium position, detects the plane-parallel capacitor constituted between this voice coil loudspeaker voice coil and magnetic circuit system
Capacitance, as the first capacitance.Wherein, at least one during the magnetic circuit system in the present invention is frame 2, Magnet 3 and washer 4.
Below using voice coil loudspeaker voice coil 1 as the first pole plate of capacitor, frame 2 as a example by the second pole plate of plane-parallel capacitor to the present invention's
Method illustrates.
Concrete, equilbrium position is the position that voice coil loudspeaker voice coil 1 does not occur when vibrating, voice coil loudspeaker voice coil when i.e. speaker does not play sound
1 location.
Step S202, the capacitance of detection voice coil vibrations to capacitor above-mentioned during another location, as the second capacitance.
When speaker play sound time, voice coil loudspeaker voice coil 1 will produce in magnetic circuit system vibration, the first pole plate and the second pole plate it
Between right opposite long-pending change, thus change the capacitance of plate condenser.When voice coil loudspeaker voice coil 1 be vibrated to except equilbrium position in addition to appoint
During meaning position, detect the capacitance of above-mentioned plane-parallel capacitor as the second capacitance.
Step S203, detection voice coil loudspeaker voice coil just difference in height to magnetic circuit system when above-mentioned another location and equilbrium position.
Concrete, can be by Laser Measuring displacement device detection voice coil loudspeaker voice coil just height to the second pole plate when initial position
Obtain the first height；Detection voice coil loudspeaker voice coil just height to the second pole plate when another location obtains the second height；Calculate the second height
With the first difference highly as difference in height.
Step S204, detection voice coil vibrations is to the capacitance of plane-parallel capacitor during current location, as current capacitance.
In order to monitor the vibration displacement of voice coil loudspeaker voice coil in real time, composition between voice coil loudspeaker voice coil and above-mentioned magnetic circuit system need to be monitored in real time
The capacitance of plane-parallel capacitor.Voice coil vibrations to the capacitance of plane-parallel capacitor during current location as current capacitance.
Step S205, according to the first capacitance, the second capacitance, difference in height and current capacitance, is calculated currently shaking of voice coil loudspeaker voice coil
Dynamic displacement.
Concrete, due to current capacitance CtComputing formula be:
Δ h=h2-h1Formula (4)
Wherein, C1It is the first capacitance, C2Being the second capacitance, ε is dielectric permittivity, and d is the equivalent separation of two pole plates, l
For the regular length limit length of side (the about girth of voice coil loudspeaker voice coil) of two pole plate right opposites of plane-parallel capacitor, htFor parallel plate capacitor
Two pole plates (magnetic circuit system) of device current the most just to height, h1For voice coil loudspeaker voice coil when equilbrium position two pole plates just to height, h2
For voice coil loudspeaker voice coil when above-mentioned another location two pole plates just to height, Δ h is difference in height, xtCurrent vibration displacement for voice coil loudspeaker voice coil.
Therefore, can be derived to formula (4) by above-mentioned formula (1):
In this manner it is possible to according to the first capacitance, the second capacitance, difference in height and current capacitance, be calculated real-time voice coil loudspeaker voice coil
Vibration displacement.
In another embodiment of the present invention, it is also possible to be beforehand through model calibration obtain characterizing capacitance and displacement it
Between the synopsis of one-to-one relationship, during the use of speaker, after the current capacitance of capacitor being detected, search comparison
Table, determines the current displacement of loudspeaker voice coil.
Voice coil loudspeaker voice coil under working in high-power, low frequency condition will produce excessive displacement, and excessive displacement can cause
Distortion drastically raises, and even occurs that obvious voice coil loudspeaker voice coil touches problem with the wiping of magnetic circuit system, and these all can cause the machine of product systems
Tool damages.The method using positive feedback (feedforward) carries out displacement monitoring to speaker, and test the most in advance obtains characterizing voltage, frequency
With the displacement model of displacement relation, predict loudspeaker vibration displacement amplitude according to displacement model and music signal, if prediction
Loudspeaker vibration displacement exceedes threshold value, then reduce the output of speaker, to protect speaker, to avoid it to damage.
But, owing to speaker is during using, may be due to the reason such as aging, temperature, material behavior, water inlet
Displacement model will be caused not conform to the actual conditions, forecast error can be strengthened, if displacement protection exists error, time the most actually used
Need to strengthen displacement protection surplus, so, limit the performance of speaker output and performance, accordingly, it would be desirable to supervise in real time
Survey the change in displacement of loudspeaker voice coil, feed back in displacement model.
In one particular embodiment of the present invention, a kind of method detecting loudspeaker voice coil vibration displacement of the present invention is also wrapped
Include: the reference bit of corresponding with the displacement model of speaker for vibration displacement ongoing frequency is moved and compares, if vibration displacement
And exceed setting value with reference to the difference between displacement, then the reference displacement of current for correspondence capacitance is replaced with vibration displacement, will
xtFeed back in displacement model, such that the negative feedback to displacement model can be realized, thus obtain more accurate displacement mould
Type so that power amplifier is more accurate to the protection of speaker, promotes the fan-out capability of speaker.
The most actually measured displacement can form feedback to the displacement model in power amplifier algorithm, compares the position only using feedforward
Move prediction more accurate, be more able to protect speaker, and then the protection surplus of minimizing speaker, promote the output work of speaker
Rate.Because feedback information is closer to real displacement, so to speaker concordance and the performance ginseng caused that works long hours
Number is followed the trail of more accurate.
The inventive method can also is that whether the actual displacement of monitoring voice coil loudspeaker voice coil exceeds the secure threshold preset, if beyond just
Reduce the input power of speaker.Whether the change numerical value that can also monitor this electric capacity exceeds the secure threshold preset, if super
Go out the input power just reducing speaker.The curent change of the circuit being connected with this electric capacity can also be monitored whether beyond presetting
Secure threshold, if beyond the input power just reducing speaker.
Present invention also offers a kind of device detecting loudspeaker voice coil vibration displacement, Fig. 3 shows the one of this device
Implement the frame principle figure of structure.
According to Fig. 3, this device 300 includes first detection module 301, height detection module the 302, second detection module
303 and computing module 304.
Above-mentioned first detection module 301 is constituted when equilbrium position and between the magnetic circuit system of speaker for detecting voice coil loudspeaker voice coil
The capacitance of capacitor, as the first capacitance；Detection voice coil vibrations, to the capacitance of capacitor during another location, holds as second
Value.
Above-mentioned height detection module 302 is for detecting voice coil loudspeaker voice coil just height to magnetic circuit system when another location and equilbrium position
It is poor to spend.
Above-mentioned second detection module 303 is for detecting voice coil vibrations to the capacitance of capacitor during current location, as currently
Capacitance.
Above-mentioned computing module 304 is for according to the first capacitance, the second capacitance, difference in height and current capacitance, being calculated sound
The vibration displacement of circle.
Fig. 4 is to implement structure according to the another kind of of a kind of device for detecting loudspeaker voice coil vibration displacement of the present invention
Frame principle figure.
As shown in Figure 4, in one particular embodiment of the present invention, this height detection module 302 includes the first height inspection
Surveying unit the 401, second height detection unit 402 and difference in height computing unit 403, the first height detection unit 401 is used for detecting
Voice coil loudspeaker voice coil just height to magnetic circuit system when initial position obtains the first height；Second height detection unit 402 is used for detecting sound
Circle just height to magnetic circuit system when the second position obtains the second height；Difference in height computing unit 403 is high for calculating second
The difference of degree and the first height is as difference in height.
Further, apparatus of the present invention also include comparison module 305 and replacement module 306, and comparison module 305 will be for shaking
The reference bit of dynamic displacement ongoing frequency corresponding with the displacement model of speaker moves and compares；If replacement module 306 is used for
Difference between vibration displacement and reference displacement exceedes setting value, then the reference displacement of current for correspondence capacitance replaces with vibration position
Move.
Present invention also offers a kind of loudspeaker monomer, on the one hand, this loudspeaker monomer includes above-mentioned detection speaker
The device of voice coil loudspeaker voice coil displacement.
On the other hand, Fig. 5 is the section of structure of a kind of embodiment of loudspeaker monomer of the present invention, according to Fig. 5 institute
Showing, this loudspeaker monomer includes the first connecting line 5 and the magnetic circuit system of loudspeaker monomer that the voice coil loudspeaker voice coil with loudspeaker monomer is connected
The second connecting line 6, capacitive detection circuit U1 and the displacement that connect calculate circuit U 2, and capacitive detection circuit U1 is arranged to detect the
Capacitance between one connecting line 5 and the second connecting line 6, displacement calculates circuit U 2 and is arranged by capacitance calculating speaker list
The vibration displacement of body voice coil loudspeaker voice coil 1.
Constituting plane-parallel capacitor between voice coil loudspeaker voice coil 1 and magnetic circuit system, wherein, magnetic circuit system includes frame 2, Magnet 3 and
Washer 4, in an embodiment of the present invention, magnetic circuit system is at least one in frame 2, Magnet 3 and washer 4, and therefore, second even
Wiring such as can be attached in frame 2, it is also possible to is attached on Magnet 3.
So, avoid the need for adding extra electret layer to monitor voice coil loudspeaker voice coil displacement in top dome portion, it is easy to accomplish, and need not
Top dome portion goes between, it is easy to produce, thus the uneven polarization caused of vibration and the distortion that lead-in wire causes can be evaded.
Further, capacitive detection circuit U1 can be use the signal far above audio section as driving source, by surveying
The capacitance of the discharge and recharge time sensing capacitor of amount electric capacity, it is also possible to be by measuring high-frequency signal declining after capacitor
Depreciation calculates the capacitance of this capacitor.
On this basis, it can be by intelligent power output amplification control unit that capacitive detection circuit U1 and displacement calculate circuit U 2,
The real-time displacement of monitoring voice coil loudspeaker voice coil, and reduce the input power of speaker when needed, protection speaker will not excessively distortion or
By physical damnification.
For the ease of checking, in one particular embodiment of the present invention, the loudspeaker monomer of employing is that moving-coil type is raised one's voice
Device, the method is equally applicable to other speakers comprising voice coil loudspeaker voice coil 1 and magnetic circuit system.
Each embodiment in this specification all uses the mode gone forward one by one to describe, identical similar portion between each embodiment
Dividing cross-reference, what each embodiment stressed is the difference with other embodiments, real especially for device
For executing example part, owing to it is substantially similar to embodiment of the method, so describing fairly simple, it is real that relevant part sees method
The part executing example illustrates, and each embodiment can be used alone as required or be combined with each other.Above institute
The device embodiment described is only schematically, the wherein said module illustrated as separating component or unit can be or
May not be physically separate, the parts shown as module or unit can be or may not be physical location,
I.e. may be located at a place, or can also be distributed on multiple NE.Can select wherein according to the actual needs
Some or all of module realize the purpose of the present embodiment scheme.Those of ordinary skill in the art are not paying creative labor
In the case of Dong, i.e. it be appreciated that and implement.
Although by example, some specific embodiments of the present invention have been described in detail, but the skill of this area
Art personnel are it should be understood that example above is merely to illustrate rather than in order to limit the scope of the present invention.The skill of this area
Art personnel should be appreciated that.
Claims (10)
1. the method detecting loudspeaker voice coil vibration displacement, it is characterised in that including:
Detect the capacitor that described voice coil loudspeaker voice coil constitutes when equilbrium position, between described voice coil loudspeaker voice coil and the magnetic circuit system of described speaker
Capacitance, as the first capacitance；
Detect the described voice coil vibrations capacitance to capacitor described during another location, as the second capacitance；
Detect described voice coil loudspeaker voice coil just difference in height to described magnetic circuit system when described another location and described equilbrium position；
Detect the described voice coil vibrations capacitance to capacitor described during current location, as current capacitance；
According to described first capacitance, described second capacitance, described difference in height and described current capacitance, it is calculated described voice coil loudspeaker voice coil
Current vibration displacement.
Method the most according to claim 1, it is characterised in that the described voice coil loudspeaker voice coil of described detection is in described another location and described
During equilbrium position just to the difference in height of described magnetic circuit system particularly as follows:
Detect described voice coil loudspeaker voice coil just height to described magnetic circuit system when described initial position and obtain the first height；
Detect described voice coil loudspeaker voice coil just height to described magnetic circuit system when described another location and obtain the second height；
Calculate the difference of described second height and described first height as described difference in height.
Method the most according to claim 1, it is characterised in that described method also includes:
Described vibration displacement is moved with the reference bit of corresponding ongoing frequency in the displacement model of described speaker and compares, if
Difference between described vibration displacement and described reference displacement exceedes setting value, then by the reference displacement of corresponding described current capacitance
Replace with described vibration displacement.
4. the device detecting loudspeaker voice coil vibration displacement, it is characterised in that including:
First detection module, for detecting described voice coil loudspeaker voice coil when equilbrium position, the magnetic circuit system of described voice coil loudspeaker voice coil and described speaker
Between the capacitance of capacitor that constitutes, as the first capacitance, and be used for detecting described voice coil vibrations to electricity described during another location
The capacitance of container, as the second capacitance；
Height detection module, is used for detecting described voice coil loudspeaker voice coil when described another location and described equilbrium position just to described magnetic circuit system
The difference in height of system；
Second detection module, for detecting the described voice coil vibrations capacitance to capacitor described during current location, holds as current
Value；And,
Computing module, for according to described first capacitance, described second capacitance, described difference in height and described current capacitance, calculates
Obtain the current vibration displacement of described voice coil loudspeaker voice coil.
Device the most according to claim 4, it is characterised in that described height detection module includes:
First height detection unit, just obtains the height of described magnetic circuit system when described initial position for detecting described voice coil loudspeaker voice coil
To the first height；
Second height detection unit, just obtains the height of described magnetic circuit system when the described second position for detecting described voice coil loudspeaker voice coil
To the second height；
Difference in height computing unit, for calculating the difference of described second height and described first height as described difference in height.
Device the most according to claim 4, it is characterised in that described device also includes:
Comparison module, for by described vibration displacement and the reference displacement of corresponding ongoing frequency in the displacement model of described speaker
Compare；
Replacement module, if exceeding setting value, then by correspondence for the difference between described vibration displacement and described reference displacement
The reference displacement of described current capacitance replaces with described vibration displacement.
7. a loudspeaker monomer, it is characterised in that include the device according to any one of claim 4-6.
8. a loudspeaker monomer, it is characterised in that include the first connecting line of being connected with the voice coil loudspeaker voice coil of described loudspeaker monomer and
The second connecting line, capacitive detection circuit and the displacement counting circuit that the magnetic circuit system of described loudspeaker monomer connects, described electric capacity
Testing circuit is arranged to detect the capacitance between described first connecting line and described second connecting line, described displacement counting circuit
It is arranged by described capacitance and calculates the vibration displacement of described loudspeaker monomer voice coil loudspeaker voice coil.
Loudspeaker monomer the most according to claim 8, it is characterised in that described magnetic circuit system includes frame, Magnet and China
In department at least one.
Loudspeaker monomer the most according to claim 8, it is characterised in that described loudspeaker monomer is coil-moving speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707086.0A CN106303883A (en) | 2016-08-23 | 2016-08-23 | A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707086.0A CN106303883A (en) | 2016-08-23 | 2016-08-23 | A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106303883A true CN106303883A (en) | 2017-01-04 |
Family
ID=57614714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610707086.0A Pending CN106303883A (en) | 2016-08-23 | 2016-08-23 | A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106303883A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954122A (en) * | 2017-02-20 | 2017-07-14 | 上海与德通讯技术有限公司 | speaker control method and device |
| CN108419186A (en) * | 2018-04-20 | 2018-08-17 | 歌尔股份有限公司 | Electroacoustic transducer and voice coil vibrations displacement control method |
| CN108886658A (en) * | 2017-03-10 | 2018-11-23 | 华为技术有限公司 | Loudspeaker unit, loudspeaker, terminal and speaker control method |
| CN111669695A (en) * | 2020-07-17 | 2020-09-15 | 维沃移动通信有限公司 | Loudspeaker amplitude detection method and electronic equipment |
| CN112188367A (en) * | 2019-07-04 | 2021-01-05 | 华为技术有限公司 | Loudspeaker assembly method and system |
| CN112600360A (en) * | 2020-12-14 | 2021-04-02 | 基合半导体（宁波）有限公司 | Focusing motor, closed-loop control method of focusing motor and camera equipment |
| US11019441B2 (en) | 2019-08-02 | 2021-05-25 | Analog Devices, Inc. | Position sensor for a voice coil |
| CN117895738A (en) * | 2024-03-15 | 2024-04-16 | 基合半导体（宁波）有限公司 | Vibration motor and displacement testing method thereof |
| CN117915245A (en) * | 2024-03-19 | 2024-04-19 | 基合半导体（宁波）有限公司 | Loudspeaker and displacement testing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103444203A (en) * | 2011-03-30 | 2013-12-11 | 伯斯有限公司 | Measuring transducer displacement |
| US20140270207A1 (en) * | 2013-03-12 | 2014-09-18 | Quantance, Inc. | Reducing Audio Distortion in an Audio System |
| CN104596616A (en) * | 2014-12-26 | 2015-05-06 | 科世达（上海）管理有限公司 | Water level detecting device and method |
| CN104640051A (en) * | 2013-11-06 | 2015-05-20 | 亚德诺半导体股份有限公司 | Method of estimating diaphragm excursion of a loudspeaker |
| CN105721993A (en) * | 2016-03-21 | 2016-06-29 | 歌尔声学股份有限公司 | Single loudspeaker, loudspeaker system and method for adjusting vibration displacement of vibration diaphragm |
-
2016
- 2016-08-23 CN CN201610707086.0A patent/CN106303883A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103444203A (en) * | 2011-03-30 | 2013-12-11 | 伯斯有限公司 | Measuring transducer displacement |
| US20140270207A1 (en) * | 2013-03-12 | 2014-09-18 | Quantance, Inc. | Reducing Audio Distortion in an Audio System |
| CN104640051A (en) * | 2013-11-06 | 2015-05-20 | 亚德诺半导体股份有限公司 | Method of estimating diaphragm excursion of a loudspeaker |
| CN104596616A (en) * | 2014-12-26 | 2015-05-06 | 科世达（上海）管理有限公司 | Water level detecting device and method |
| CN105721993A (en) * | 2016-03-21 | 2016-06-29 | 歌尔声学股份有限公司 | Single loudspeaker, loudspeaker system and method for adjusting vibration displacement of vibration diaphragm |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954122A (en) * | 2017-02-20 | 2017-07-14 | 上海与德通讯技术有限公司 | speaker control method and device |
| CN108886658A (en) * | 2017-03-10 | 2018-11-23 | 华为技术有限公司 | Loudspeaker unit, loudspeaker, terminal and speaker control method |
| CN108886658B (en) * | 2017-03-10 | 2020-07-28 | 华为技术有限公司 | Speaker unit, speaker, terminal, and speaker control method |
| US11019432B2 (en) | 2017-03-10 | 2021-05-25 | Huawei Technologies Co., Ltd. | Speaker unit, speaker, terminal, and speaker control method |
| CN108419186A (en) * | 2018-04-20 | 2018-08-17 | 歌尔股份有限公司 | Electroacoustic transducer and voice coil vibrations displacement control method |
| WO2019200715A1 (en) * | 2018-04-20 | 2019-10-24 | 歌尔股份有限公司 | Electroacoustic transducer and method for controlling vibration displacement of voice coil |
| CN108419186B (en) * | 2018-04-20 | 2019-12-06 | 歌尔股份有限公司 | electroacoustic transducer and voice coil vibration displacement control method |
| CN112188367A (en) * | 2019-07-04 | 2021-01-05 | 华为技术有限公司 | Loudspeaker assembly method and system |
| CN112188367B (en) * | 2019-07-04 | 2021-10-22 | 荣耀终端有限公司 | Loudspeaker assembly method and system |
| US11019441B2 (en) | 2019-08-02 | 2021-05-25 | Analog Devices, Inc. | Position sensor for a voice coil |
| CN111669695B (en) * | 2020-07-17 | 2022-01-04 | 维沃移动通信有限公司 | Loudspeaker amplitude detection method and electronic equipment |
| CN111669695A (en) * | 2020-07-17 | 2020-09-15 | 维沃移动通信有限公司 | Loudspeaker amplitude detection method and electronic equipment |
| CN112600360A (en) * | 2020-12-14 | 2021-04-02 | 基合半导体（宁波）有限公司 | Focusing motor, closed-loop control method of focusing motor and camera equipment |
| CN117895738A (en) * | 2024-03-15 | 2024-04-16 | 基合半导体（宁波）有限公司 | Vibration motor and displacement testing method thereof |
| CN117895738B (en) * | 2024-03-15 | 2024-06-04 | 基合半导体（宁波）有限公司 | Vibration motor and displacement testing method thereof |
| CN117915245A (en) * | 2024-03-19 | 2024-04-19 | 基合半导体（宁波）有限公司 | Loudspeaker and displacement testing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106303883A (en) | A kind of detect the method for loudspeaker voice coil vibration displacement, device and loudspeaker monomer | |
| JP6659865B2 (en) | Moving coil speaker system | |
| CN106068007B (en) | Nonlinear loudspeaker system identifying method | |
| CN204948356U (en) | For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually | |
| CN104780489A (en) | Structure for detecting vibration displacement of loudspeaker and double-effect device capable of realizing acoustic-electric inter-conversion | |
| CN105144748B (en) | Twin coil loudspeaker | |
| CN106162470B (en) | Moving-coil loudspeaker | |
| CN106211000A (en) | A kind of coil-moving speaker | |
| CN202551345U (en) | Fixture and system for testing microphone | |
| CN103404172A (en) | Microphone and method to position a membrane between two backplates | |
| CN109151145A (en) | A kind of detection method and device of voice-grade channel | |
| CN109997372A (en) | A kind of method and loudspeaker adjusting diaphragm oscillations equilbrium position | |
| CN102037738A (en) | Audio input device, method for manufacturing the same, and information processing system | |
| KR102260112B1 (en) | movable coil speaker | |
| US9894453B2 (en) | Absolute sensitivity of a MEMS microphone with capacitive and piezoelectric electrodes | |
| CN102037739A (en) | Voice input device and manufacturing method thereof, and information processing system | |
| CN105554629A (en) | Method and system for audio fidelity of loudspeaker | |
| CN204681590U (en) | MEMS microphone, pressure sensor integrated morphology | |
| CN204518064U (en) | For the double effect device that the structure and acoustic-electric that detect loudspeaker vibration displacement turn mutually | |
| CN105072551A (en) | Micro-electromechanical system (MEMS) microphone and MEMS acoustical sensor chip | |
| US9866982B2 (en) | Micro speaker with capacitors formed by conductive diaphragm and segmented pole plate | |
| CN204669605U (en) | Acoustic equipment | |
| US10887713B1 (en) | Microphone defect detection | |
| CN104113804A (en) | Loudspeaker system and driving method thereof | |
| CN108419186B (en) | electroacoustic transducer and voice coil vibration displacement control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |
|
| RJ01 | Rejection of invention patent application after publication |