CN108124231A - Loudspeaker enclosure defect inspection method - Google Patents
Loudspeaker enclosure defect inspection method Download PDFInfo
- Publication number
- CN108124231A CN108124231A CN201611069134.4A CN201611069134A CN108124231A CN 108124231 A CN108124231 A CN 108124231A CN 201611069134 A CN201611069134 A CN 201611069134A CN 108124231 A CN108124231 A CN 108124231A
- Authority
- CN
- China
- Prior art keywords
- impedance
- loudspeaker enclosure
- lower limit
- upper limit
- 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.)
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers
Abstract
The invention discloses a kind of loudspeaker enclosure defect inspection method, the tonequality decline caused by the sound press leaked for the crack of loudspeaker enclosure junction measures and accurately differentiates that loudspeaker enclosure whether there is defect, including：Step A, based on the first impedance (impedance) measured at the loudspeaker enclosure for being appointed as certified products, a certain range of first upper limit and the first lower limit whether setting out for differentiating certified products；The certain frequency point of step A the first impedances measured is set as datum mark by step B；Step C, the second impedance for the loudspeaker enclosure as check object measure, the difference in size of the first impedance Yu the second impedance of datum mark；Step D moves first upper limit with setting second upper limit and the second lower limit after the first lower limit according to the difference in size of the first impedance and the second impedance；And step E, judge the second impedance whether departing from least one scope in second upper limit and the second lower limit and and then differentiate defect whether.
Description
Technical field
The present invention relates to a kind of loudspeaker enclosure (speaker enclosure) defect inspection methods, in more detail, this hair
It is bright to be related to a kind of loudspeaker enclosure defect inspection method that accurately differentiate loudspeaker enclosure and whether there is defect.
Background technology
Loud speaker is generated dilatational wave in air and is radiated after a kind of vibration for converting electrical signals into oscillating plate
The sound appliances of sound wave, are also referred to as amplifier.
The type that oscillating plate is placed directly in air is known as radiation type speaker, and oscillating plate is placed in the inner class of bugle (horn)
Type is known as bugle type loudspeaker.Direct radial pattern be largely for the taper of radio or audio device (cone) loud speaker,
Some loud speakers use metal vibration plate.
Loud speaker generally includes loudspeaker enclosure, loudspeaker unit (unit) and network.
Loudspeaker enclosure is the loud speaker chest made using timber or Plastic, that is, refer to the shell of loud speaker.
Loudspeaker unit refers to rounded form that mounted on speaker housings positive oscillating plate network refers to basis
The electronic component device of more than one loudspeaker unit is passed to after the output signal of frequency range differentiation amplifier, is typically mounted on
The interior wall of loudspeaker enclosure.
On the other hand, loudspeaker enclosure is used for preventing the sound that loudspeaker unit issues from cancelling each other.Loudspeaker unit
The phase for the sound that front is issued with the back side mutually on the contrary, a part of sound can be allowed to cancel each other if no loudspeaker enclosure and
Reduce volume.So loudspeaker unit is assembled into loudspeaker enclosure.
Loudspeaker unit is a kind of component that oscillating plate is driven to operate and is made a sound, and most loud speaker is mounted with more
A various loudspeaker units.That is, due to all frequency ranges that sound can not be only exported with a loudspeaker unit, by each
Loudspeaker unit exports sound with sharing frequency range.
The signal that network is used for amplifier to be inputted passes to each loudspeaker unit, can give play to filter function,
That is, distinguish voice signal according to each frequency range.
In addition to being built in the situation of various multimedia devices, possess said structure loud speaker and amplification sound after it is defeated
The amplifier for going out electric signal is separated, therefore with electricity in a state that loudspeaker unit is incorporated in the loudspeaker enclosure of box body form
Line is connected to amplifier.
That is, the electric signal that amplifier is exported is communicated to the loudspeaker unit for being built in loudspeaker enclosure, quilt by electric wire
The electric signal of input loudspeaker unit exports after being then converted into sound.
For loudspeaker unit as previously mentioned to be wired to the loudspeaker unit of amplifier, the loudspeaker unit is then and anti-
It is used given play to the loudspeaker enclosure combination of chest effect with being only externally exposed after, this is because the shape exposed in itself in loud speaker
State using when the tonequality of sound that is generated can also be adversely affected.This is because what the front of speaker diaphragm was generated
The sound that sound and its back side are generated interferes with each other, and longer wavelengths of bass is given birth to by the positive sound generated and the back side
Into sound possess the time and poorly arrive at listener and reduce tonequality the phenomenon that occur being mutually reinforcing or offset.
Therefore, loud speaker is attached to loudspeaker enclosure and is able to validly to absorb the sound that loudspeaker vibration back generated
Sound or in using it for, the damping (damping) of woofer (woofer), therefore loud speaker can be improved and generated
Sound quality.
The loudspeaker enclosure for being used for enriching speaker volume as previously mentioned is then widely used in speaker (loud) loud speaker
Or Microspeaker of mobile phone etc. etc..
More specifically, foregoing loudspeaker enclosure is a kind of back side position that loudspeaker unit is wrapped up in the form of chest
Structure, in a manner of binding agent or ultrasonic wave melt binding injection-moulding plastic object bond after seal.
But gap or the sealing generation gap for being attached loudspeaker unit etc occur for the junction of loudspeaker enclosure
During defect, sound press will pass through the clearance leakage.
When sound press leaks as previously mentioned, the impedance operator of loud speaker will change.Therefore, it is necessary to measure do not have it is defective
The impedance of normal loud speaker and set above-mentioned impedance the upper limit and lower limit datum line (being usually ± 10%) and be able to for making
For check object loud speaker the defects of be detected.That is, the impedance of the loud speaker as check object departs from said reference
Just it is judged as the defective products of existing defects during line.
By taking Fig. 1 as an example illustrate if, as shown in Figure 1a as check object loud speaker impedance without departing from benchmark
It is determined as certified products if line, the impedance as the loud speaker of check object as shown in Figure 1 b is determined as if departing from datum line
Defective products.That is, the impedance of Fig. 1 b is departing from datum line.
But when being more than a certain range as the impedance error of the loud speaker of check object as illustrated in figure 1 c, it can go out
Existing following point, that is, even if loudspeaker enclosure does not have defect and will not leak sound press, but only because impedance is departing from base
Directrix and be determined as defective products.That is, it may appear that certified products are judged as the mistake of defective products.
The content of the invention
Present invention seek to address that the problem of being drawn in above-mentioned background technology, the object of the present invention is to provide a kind of loudspeaker enclosures
Defect inspection method can prevent the defective products in loudspeaker enclosure defect inspection process from differentiating mistake, so as to significantly carry in advance
The reliability of high defective products screening.
In addition, the purpose of the present invention is not limited to above-mentioned purpose, the other purposes do not mentioned above can be from rear
It states and is clearly illustrated in record.
The present invention can reach above-mentioned purpose, loudspeaker enclosure defect inspection method according to embodiments of the present invention, for sentencing
Tonequality caused by the sound press of the crack leakage of other loudspeaker enclosure junction declines, and comprises the following steps：Step A, to be appointed as
Based on the first impedance measured at the loudspeaker enclosure of certified products, a certain range of the whether setting out for differentiating certified products
One upper limit and the first lower limit；The certain frequency point of above-mentioned steps A the first impedances measured is set as datum mark by step B；
Step C, the second impedance for the loudspeaker enclosure as check object measure, measure said reference point the first impedance with
The difference in size of second impedance；Step D, according to the difference in size of above-mentioned first impedance and above-mentioned second impedance movement above-mentioned first
The upper limit after above-mentioned first lower limit with setting second upper limit and the second lower limit；And step E, judge above-mentioned second impedance whether departing from
In above-mentioned second upper limit and above-mentioned second lower limit at least one scope and and then differentiate defect whether.
Herein, it is preferable that above-mentioned first impedance includes the resonance range of the impedance based on frequency with above-mentioned second impedance.
Further still, it is preferred that said reference point is the frequency location for the impedance stabilization for eliminating resonance range.
Further still, it is preferred that above-mentioned steps E in the resonance range of above-mentioned second impedance to sentencing whether defect
Not.
According to the present invention based on above-described embodiment, though for loudspeaker enclosure the defects of be detected when impedance error compared with
Greatly also can correction error immediately, therefore the phenomenon that can prevent defective products from differentiating mistake in advance, so as to which defective products greatly improved
The reliability of screening.
Description of the drawings
Fig. 1 a~Fig. 1 c are the graphs for illustrating loudspeaker enclosure defect inspection method according to prior art.
Fig. 2 is the flow chart for illustrating loudspeaker enclosure defect inspection method according to embodiments of the present invention.
Fig. 3 a~Fig. 3 f are the graphs for illustrating loudspeaker enclosure defect inspection method according to embodiments of the present invention.
Specific embodiment
The aftermentioned embodiment being described with reference to the accompanying drawings will be helpful to be expressly understood that advantages of the present invention, feature and its realization
Method.But the invention is not restricted to following revealed embodiment, the present invention can be realized by various mutually different forms,
The present embodiment only contributes to the complete announcement of the present invention, and its main purpose is the general technology people into fields of the present invention
Member intactly illustrates scope of the invention.The term used in this specification is only to illustrate embodiment, must not therefore limit to this hair
It is bright.Unless specifically mentioned in sentence, otherwise odd number manifestation mode also includes more situations.
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.On the other hand, in fields of the present invention
The those skilled in the art inscape and its effect that can be readily appreciated that, will be omitted or simplified its diagram with specifically
It is bright, it will be described in detail below based on part for the present invention.
Loudspeaker enclosure defect inspection method according to embodiments of the present invention, the crack for differentiating loudspeaker enclosure junction are let out
Tonequality caused by the sound press of leakage declines, and as shown in the flowchart of figure 2, comprises the following steps：Step A, to be appointed as qualification
At the loudspeaker enclosure of product measure the first impedance based on, whether setting out for differentiating certified products a certain range of first on
Limit and the first lower limit；The certain frequency point of above-mentioned steps A the first impedances measured is set as datum mark by step B；Step
C, the second impedance for the loudspeaker enclosure as check object measure, and measure the first impedance and second of said reference point
The difference in size of impedance；Step D moves above-mentioned first upper limit according to the difference in size of above-mentioned first impedance and above-mentioned second impedance
With setting second upper limit and the second lower limit after above-mentioned first lower limit；And step E, judge above-mentioned second impedance whether departing from above-mentioned
In second upper limit and above-mentioned second lower limit at least one scope and and then differentiate defect whether.
First, step A measurements are designated as the impedance of the loudspeaker enclosure of certified products.That is, the loudspeaker enclosure of certified products into
To check benchmark, impedance measured at this time is appointed as the first impedance as shown in Figure 3a, and sets one based on this
Determine first upper limit and the first lower limit of scope.
Then, the certain frequency point of the first impedance is set as datum mark by step B as shown in Figure 3b, this is in order to same
Occur to give during impedance error on the loudspeaker enclosure of one specification and correct, it will be as the correction datum mark of aftermentioned second impedance.
Then, step C measures the impedance of the loudspeaker enclosure as check object and is assigned therein as the second impedance.Then such as
The shown datum marks in earlier set of Fig. 3 c measure the difference in size of the first impedance and the second impedance and are recorded with after an action of the bowels
Continuous step uses.
Herein, it is preferable that above-mentioned first impedance includes the resonance range of the impedance based on frequency with above-mentioned second impedance, this
It is because resonant resistance can significantly be distinguished in variation when loudspeaker enclosure leaks sound press.
Further, said reference point is preferable to eliminate the frequency location of the impedance stabilization of resonance range.As previously mentioned,
Resonant resistance is present with variation when sound press leaks, therefore sets with needing when setting datum mark the resonance range of exclusion impedance.
That is, if selecting the resonant position of impedance as datum mark as, the resonant resistance variation caused by sound press leakage may cause scarce
Fall into the mistake in detection.
Then, above-mentioned steps D is moved as shown in Figure 3d according to the difference in size of above-mentioned first impedance and above-mentioned second impedance
It moves above-mentioned first upper limit and sets second upper limit and the second lower limit with above-mentioned first lower limit.That is, Fig. 3 d are referred to, according to spacing
A moves first upper limit and second upper limit and the second lower limit is set with the first lower limit and is achieved the correction of impedance.
Then, step E judge above-mentioned second impedance whether departing from above-mentioned second upper limit and above-mentioned second lower limit at least
One scope and whereby determine whether defect.At this point, in the resonance range of above-mentioned second impedance be directed to defect whether into
Row judge it is preferable, this is because resonant resistance changes greatly when loudspeaker enclosure is defective.It therefore, can be light in resonance range
Change places the defects of confirming resistance difference between certified products and object product and grasping loudspeaker enclosure with becoming clear whether.
That is, during the defects of detection loudspeaker enclosure, though resistance difference between the impedance of check object and certified products compared with
Greatly and departing from error range, as long as correcting second upper limit and the second lower limit on the basis of certified products as shown in Figure 3 e
If being detected whether defect is directed under state, the mistake that check object is judged as defective products would not occur.
And as illustrated in figure 3f, the difference of the resonant resistance position between check object and certified products can be grasped exactly
It is different, therefore defective products can be judged exactly.According to the embodiment of the present invention explained above, even if detecting loudspeaker enclosure
Impedance error is larger during defects detection, can be also corrected immediately for error and be able to prevent that defective products from differentiating mistake in advance,
So as to which the reliability for the screening for being directed to defective products greatly improved.
In order to help to understand claims of the present invention, the present invention is described in detail in foregoing teachings in a manner of wide
Feature and technological merit.Those skilled in the art in fields of the present invention are when knowing, in no change technical thought of the invention
Or can occur the embodiment of other various specific forms in the case of essential feature.Therefore above-described embodiment is in all respects all
It simply illustrates without limited.Scope of the invention should be defined by tbe claims, and really interest field should wrap the present invention
Include all the derived modifications of claims and its equivalent concept institute and deformation.
Claims (4)
1. a kind of loudspeaker enclosure defect inspection method, caused by the sound press for the crack leakage for being used to differentiate loudspeaker enclosure junction
Tonequality decline, which is characterized in that
Comprise the following steps：
Step A based on the first impedance measured at the loudspeaker enclosure for being appointed as certified products, sets out to differentiate certified products
Whether a certain range of first upper limit and the first lower limit；
The certain frequency point of the step A the first impedances measured is set as datum mark by step B；
Step C, the second impedance for the loudspeaker enclosure as check object measure, and measure the first resistance of the datum mark
The anti-difference in size with the second impedance；
Step D moves first upper limit and described first according to the difference in size of first impedance and second impedance
Second upper limit and the second lower limit are set after lower limit；And
Whether step E judges second impedance departing from least one scope in second upper limit and second lower limit
And and then whether differentiating defect.
2. loudspeaker enclosure defect inspection method according to claim 1, which is characterized in that
First impedance includes the resonance range of the impedance based on frequency with second impedance.
3. loudspeaker enclosure defect inspection method according to claim 2, which is characterized in that
The datum mark is the frequency location for the impedance stabilization for eliminating resonance range.
4. loudspeaker enclosure defect inspection method according to claim 3, which is characterized in that
The step E is in the resonance range of second impedance to differentiating whether defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611069134.4A CN108124231A (en) | 2016-11-28 | 2016-11-28 | Loudspeaker enclosure defect inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611069134.4A CN108124231A (en) | 2016-11-28 | 2016-11-28 | Loudspeaker enclosure defect inspection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108124231A true CN108124231A (en) | 2018-06-05 |
Family
ID=62225412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611069134.4A Pending CN108124231A (en) | 2016-11-28 | 2016-11-28 | Loudspeaker enclosure defect inspection method |
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Citations (7)
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| CN104237832A (en) * | 2014-10-13 | 2014-12-24 | 北京东方计量测试研究所 | Calibration method and device of complex impedance standard device |
| CN104349262A (en) * | 2013-07-23 | 2015-02-11 | 亚德诺半导体股份有限公司 | Method of detecting enclosure leakage of enclosure mounted loudspeakers |
| CN104515659A (en) * | 2014-12-08 | 2015-04-15 | 歌尔声学股份有限公司 | Quality factor-based device and method for detecting loudspeaker module sealing |
| CN105953980A (en) * | 2016-04-29 | 2016-09-21 | 维沃移动通信有限公司 | Method for detecting sealing performance of cavity, and mobile terminal |
-
2016
- 2016-11-28 CN CN201611069134.4A patent/CN108124231A/en active Pending
Patent Citations (7)
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| CN88100509A (en) * | 1987-01-29 | 1988-08-10 | 约翰弗兰克制造公司 | The apparatus and method of correcting electric measuring calibrating device internally |
| JP4209596B2 (en) * | 2001-05-17 | 2009-01-14 | ティーオーエー株式会社 | Speaker failure detection device and speaker failure detection method |
| KR101386366B1 (en) * | 2012-11-27 | 2014-04-16 | 시그마엘텍(주) | Method for resonance frequency measuring of speaker and apparatus using the same |
| CN104349262A (en) * | 2013-07-23 | 2015-02-11 | 亚德诺半导体股份有限公司 | Method of detecting enclosure leakage of enclosure mounted loudspeakers |
| CN104237832A (en) * | 2014-10-13 | 2014-12-24 | 北京东方计量测试研究所 | Calibration method and device of complex impedance standard device |
| CN104515659A (en) * | 2014-12-08 | 2015-04-15 | 歌尔声学股份有限公司 | Quality factor-based device and method for detecting loudspeaker module sealing |
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