CN203984683U - Acoustic calibration's system - Google Patents
Acoustic calibration's system Download PDFInfo
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- CN203984683U CN203984683U CN201420305278.5U CN201420305278U CN203984683U CN 203984683 U CN203984683 U CN 203984683U CN 201420305278 U CN201420305278 U CN 201420305278U CN 203984683 U CN203984683 U CN 203984683U
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Abstract
The utility model relates to a kind of acoustic calibration system.For the calibration of microphone monomer, microphone monomer comprises, transducer, the acoustic signal sending for sensing one external calibration sound source; Amplifying unit, is connected with the output of transducer, and for the output signal of transducer is amplified to conversion, amplifying unit comprises a parameter regulon, accepts the work of a control signal in order to regulate the parameter of amplifying unit; Calibration testing circuit, is controllably connected with the output of amplifying unit, for signal and a reference signal of amplifying unit output are compared to generate control signal.Microphone monomer of the present utility model can be realized self calibration, and can the same time carry out detection calibration to multiple microphone monomers, greatly improves testing efficiency; Also can realize in system testing, provide better quality control for finished product after microphone monomer and assembling.
Description
Technical field
The utility model relates to electronic technology field, is specifically related to a kind of acoustic calibration system.
Background technology
Meet research and development design in order to ensure microphone products, produce assembling or user's instructions for use, microphone products need to be passed through corresponding electric performance test, traditional microphone test macro sends standard testing sound source by loud speaker, generation test result compares the output signal of microphone to be measured and a reference microphone under standard testing sound source, directly classify according to test result, the shortcoming of its existence is only can classify to microphone products, do not control yield, on this basis, applicant has developed the programmable MEMS microphone system of a kind of single line, at the ASIC of microphone to be measured (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)) be provided with OTP (One time Program in chip, one-time programming) memory, realize otp memory is carried out to gain-adjusted by multiplexing output pin, and then complete the calibration to encapsulating rear finished product MEMS microphone gain.This improved system, after having surveyed for the first time, need to enter otp memory according to the reverse burning of test value, and then returns and survey one time, has the defect that testing efficiency is low.
Utility model content
The purpose of this utility model is, a kind of acoustic calibration system is provided, and solves above technical problem;
The purpose of this utility model is to provide hardware itself, does not comprise any software and method;
The technical problem that the utility model solves can realize by the following technical solutions:
Acoustic calibration's system, for the calibration of microphone monomer, wherein, described microphone monomer comprises,
Transducer, the acoustic signal sending for sensing one external calibration sound source;
Amplifying unit, is connected with the output of described transducer, and for the output signal of described transducer is amplified to conversion, described amplifying unit comprises a parameter regulon, accepts the work of a control signal in order to regulate the parameter of described amplifying unit;
Calibration testing circuit, is controllably connected with the output of described amplifying unit, for signal and the reference signal of described amplifying unit output are compared to generate described control signal.
Preferably, described calibration testing circuit comprises,
One root mean square detecting unit, connects the output of described amplifying unit, for the signal of described amplifying unit output is carried out to root mean square calculation, to obtain the effective information of signal;
One comparing unit, for described effective information and described reference signal are compared, obtains comparison signal;
One decision unit, is connected with the output of described comparing unit, generates described control signal or a triggering signal according to described comparison signal, and described triggering signal is for disconnecting being connected between described calibration testing circuit and the output of described amplifying unit.
Preferably, described calibration testing circuit is connected with the output of described amplifying unit by a controlled branch road, and the control end of described controlled branch road connects described triggering signal, in disconnecting under described triggering signal effect.
Preferably, described decision unit comprises an edge triggered flip flop, and described edge triggered flip flop connects a clock signal, and described edge triggered flip flop is meeting the described triggering signal of lower generation that imposes a condition.
Preferably, described reference signal produces by a reference signal generator.
Preferably, described parameter regulon adopts gain adjustment unit, regulates for the gain to described amplifying unit.
Preferably, described reference signal generator produces the reference signal of two different sizes, and the reference signal of two different sizes connects described comparing unit by a selector switch.
Beneficial effect: owing to adopting above technical scheme, microphone monomer of the present utility model can be realized self calibration, and can the same time carry out detection calibration to multiple microphone monomers, greatly improves testing efficiency; Also can realize in system testing, provide better quality control for finished product after microphone monomer and assembling.
Brief description of the drawings
Fig. 1 is system architecture schematic diagram of the present utility model;
Fig. 2 is schematic flow sheet of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as restriction of the present utility model.
With reference to Fig. 1, acoustic calibration's system, for the calibration of microphone monomer, wherein, microphone monomer comprises,
Transducer 10, the acoustic signal sending for sensing one external calibration sound source;
Amplifying unit 11, is connected with the output of transducer 10, and for the output signal of transducer 10 is amplified to conversion, amplifying unit 11 comprises a parameter regulon, accepts the work of a control signal in order to regulate the parameter of amplifying unit 11;
Calibration testing circuit, is controllably connected with the output of amplifying unit 11, compares to generate control signal for signal and reference signal that amplifying unit 11 is exported.The output of amplifying unit 11 also connects work branch 16, catches to realize normal acoustics.
As a kind of preferred embodiment of the present utility model, calibrate testing circuit and comprise,
One root mean square (Root Mean Square, RMS) detecting unit 13, the output of connection amplifying unit 11, carries out root mean square calculation for the signal that amplifying unit 11 is exported, to obtain the effective information of signal;
One comparing unit 14, for effective information and reference signal are compared, obtains comparison signal;
One decision unit 15, is connected with the output of comparing unit 14, generates control signal or a triggering signal according to comparison signal, and triggering signal is for disconnecting being connected between calibration testing circuit and the output of amplifying unit 11.
First the sine wave that root mean square detecting unit of the present utility model is exported amplifying unit 11 carries out all-wave shaping and then carries out filtering, to obtain the effective information of signal.Can adopt general RMS detector, therefore not to repeat here.
As a kind of preferred embodiment of the present utility model, calibration testing circuit can be connected with the output of amplifying unit 11 by a controlled branch road 12, the control end of controlled branch road 12 connects triggering signal, under triggering signal effect, disconnect, for turn-off controlled branch road 12 after completing in calibration under the effect of triggering signal.The utility model disconnects by controlled branch road 12 after having calibrated, and calibration testing circuit is turned off, and prevents false touch in microphone monomer course of normal operation.
As a kind of preferred embodiment of the present utility model, decision unit 15 can comprise an edge triggered flip flop, and edge triggered flip flop connects a clock signal.Edge triggered flip flop is meeting the lower generation triggering signal that imposes a condition.
Reference signal of the present utility model can be passed through a reference signal generator, as reference voltage generator produces, further, reference signal generator can produce the reference signal of two different sizes, a kind of specific embodiment, the reference signals of two different sizes can connect comparing unit by a selector switch, to realize, effective information and a selected reference signal are compared; Another kind of specific embodiment, comparing unit 14 can comprise two comparators, and the reference signal of two different sizes can also connect respectively a comparator, realizes effective information is compared from the number range that the reference signal of two different sizes forms.
As a kind of preferred embodiment of the present utility model, parameter regulon comprises gain adjustment unit, for the gain of amplifying unit 11 is regulated; As adopted the amplifier of a variable gain; Parameter regulon can also comprise phase adjustment unit, for the phase place of amplifying unit 11 is regulated.
A kind of implementation method of the present utility model, with reference to Fig. 2, comprises the following steps:
Step 1, microphone monomer obtains after the acoustic signal of a setting amplitude that an outside sound source sends or setpoint frequency, mates with an internal signal, after the match is successful, execution step 2; Internal signal can be stored in a memory cell; The signal of setpoint frequency can be that frequency is signal or other the self-defining signal of 1KHz or 10KHz;
Step 2, outside sound source is sent a calibrating acoustic signal, and calibration testing circuit detects the signal of microphone monomer output, compares with reference signal, generates a control signal to adjust the parameter of amplifying unit, execution step 3 in the time that comparative result exists deviation;
Step 3, repeating step 2 until comparative result meet impose a condition, calibration finish.
As a kind of preferred embodiment of the present utility model,
In step 3, comparative result is satisfied to impose a condition, and decision unit generates a triggering signal to disconnect being connected between calibration testing circuit and the output of amplifying unit.
Microphone monomer of the present utility model can be realized self calibration, and can the same time carry out detection calibration to multiple microphone monomers, greatly improves testing efficiency; And while being arranged on for the first time on mobile phone or other portable sets for microphone monomer, also can realize in system testing, provide better quality control for finished product after microphone monomer and assembling.
The foregoing is only the utility model preferred embodiment; not thereby limit execution mode of the present utility model and protection range; to those skilled in the art; the scheme that being equal to of should recognizing that all utilization the utility model specifications and diagramatic content done replaces and apparent variation obtains, all should be included in protection range of the present utility model.
Claims (7)
1. acoustic calibration's system, for the calibration of microphone monomer, is characterized in that, described microphone monomer comprises,
Transducer, the acoustic signal sending for sensing one external calibration sound source;
Amplifying unit, is connected with the output of described transducer, and for the output signal of described transducer is amplified to conversion, described amplifying unit comprises a parameter regulon, accepts the work of a control signal in order to regulate the parameter of described amplifying unit;
Calibration testing circuit, is controllably connected with the output of described amplifying unit, for signal and the reference signal of described amplifying unit output are compared to generate described control signal.
2. acoustic calibration according to claim 1 system, is characterized in that, described calibration testing circuit comprises,
One root mean square detecting unit, connects the output of described amplifying unit, for the signal of described amplifying unit output is carried out to root mean square calculation, to obtain the effective information of signal;
One comparing unit, for described effective information and described reference signal are compared, obtains comparison signal;
One decision unit, is connected with the output of described comparing unit, generates described control signal or a triggering signal according to described comparison signal, and described triggering signal is for disconnecting being connected between described calibration testing circuit and the output of described amplifying unit.
3. acoustic calibration according to claim 2 system, it is characterized in that, described calibration testing circuit is connected with the output of described amplifying unit by a controlled branch road, and the control end of described controlled branch road connects described triggering signal, under described triggering signal effect, disconnects.
4. acoustic calibration according to claim 2 system, is characterized in that, described decision unit comprises an edge triggered flip flop, and described edge triggered flip flop connects a clock signal, and described edge triggered flip flop is meeting the described triggering signal of lower generation that imposes a condition.
5. acoustic calibration according to claim 1 system, is characterized in that, described reference signal produces by a reference signal generator.
6. acoustic calibration according to claim 1 system, is characterized in that, described parameter regulon adopts gain adjustment unit, regulates for the gain to described amplifying unit.
7. acoustic calibration according to claim 5 system, is characterized in that, described reference signal generator produces the reference signal of two different sizes, and the reference signal of two different sizes connects described comparing unit by a selector switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305278.5U CN203984683U (en) | 2014-06-09 | 2014-06-09 | Acoustic calibration's system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305278.5U CN203984683U (en) | 2014-06-09 | 2014-06-09 | Acoustic calibration's system |
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| CN203984683U true CN203984683U (en) | 2014-12-03 |
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| CN201420305278.5U Expired - Fee Related CN203984683U (en) | 2014-06-09 | 2014-06-09 | Acoustic calibration's system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936124A (en) * | 2015-06-11 | 2015-09-23 | 科瑞自动化技术（苏州）有限公司 | Mounting sealing test device for microphone of notebook computer |
| CN106714059A (en) * | 2015-11-13 | 2017-05-24 | 钰太芯微电子科技（上海）有限公司 | Self-calibration method based on MEMS microphone and microphone |
| WO2017157847A1 (en) * | 2016-03-15 | 2017-09-21 | Tdk Corporation | Method for calibrating a microphone and microphone |
-
2014
- 2014-06-09 CN CN201420305278.5U patent/CN203984683U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104936124A (en) * | 2015-06-11 | 2015-09-23 | 科瑞自动化技术（苏州）有限公司 | Mounting sealing test device for microphone of notebook computer |
| CN106714059A (en) * | 2015-11-13 | 2017-05-24 | 钰太芯微电子科技（上海）有限公司 | Self-calibration method based on MEMS microphone and microphone |
| WO2017157847A1 (en) * | 2016-03-15 | 2017-09-21 | Tdk Corporation | Method for calibrating a microphone and microphone |
| US10356525B2 (en) | 2016-03-15 | 2019-07-16 | Tdk Corporation | Method for calibrating a microphone and microphone |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20200609 |
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| CF01 | Termination of patent right due to non-payment of annual fee |