CN107750037A - A kind of electret miaow head double-clicks acoustic control detection trigger circuit and method - Google Patents
A kind of electret miaow head double-clicks acoustic control detection trigger circuit and method Download PDFInfo
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- CN107750037A CN107750037A CN201711086107.2A CN201711086107A CN107750037A CN 107750037 A CN107750037 A CN 107750037A CN 201711086107 A CN201711086107 A CN 201711086107A CN 107750037 A CN107750037 A CN 107750037A
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
- H04R1/083—Special constructions of mouthpieces
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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Abstract
The invention discloses a kind of electret miaow head to double-click acoustic control detection trigger circuit and method, the detection circuit includes sound collection circuit, sound amplifying circuit and sound comparison circuit, the sound collection circuit is connected to sound amplifying circuit, and sound amplifying circuit is connected to and sound comparison circuit.The circuit and method by detecting circuit and special algorithm, not only can the sound control circuit false triggering of anti-stop-band electret miaow head light illuminating lamp, cause electricity consumption to waste, and cost of implementation is low, detection accurately and reliably, can effectively save electric energy.
Description
Technical field
The invention belongs to the sound control circuit and method in microphone techniques field, more particularly to microphone.
Background technology
Electret miaow head, also known as microphone, microphone, microphone, it is a kind of energy that voice signal is converted to electric signal
Energy converter part, at present electret miaow head largely apply corridor or interior acoustic-control illuminating on, as long as substantially miaow head is caught
Grasp after the voice signal of amplification, signal level exceedes the level threshold values of circuit configuration, and corridor or indoor illuminating lamp are just
Can light, at present on the market this voice-controlled manner maximum the drawbacks of exactly when user closes the door or opens the door and any can reach sound
The sound of control circuit triggering threshold values may all trigger sound control circuit and light illuminating lamp, and illuminating lamp can at least light 5 every time
~10 seconds, so cause great electricity consumption and waste, the side of another human body infrared inductive switch illuminating lamp is used in building
Formula, one side Costco Wholesale are high, the sensing of another aspect human body infrared to the distance and sensed orientation of people, angle and be provided with compared with
High requirement.
Patent application 201320037350.6 discloses a kind of alarm bell acoustic control detection means, including microphone, main control unit,
Physics wireline interface or wave point and power input, the microphone be used for detect it is existing save from damage alarm bell sound and option inspection
Survey secondary alarm bell sound among acoustic scene or indirect detection；The main control unit is used for the microphone detection signal
Reason, identification and generation corresponding control signal；The wired or wireless interface of physics, under the corresponding master signal, to
Neighbouring telecommunication devices transmission alarm content, telecommunication warning device can be mobile phone, computer or phone.Utility model profit
With increasingly mature and inexpensive at present wireless communication technique and network, provided for the existing ringing alarm system of high-volume instant, low
The remote-end alarm function of cost.However, the patent application can not differentiate to sound source, misidentification erroneous judgement is easily caused, by mistake
Illuminating lamp is lighted in triggering, causes electricity consumption to waste.
The content of the invention
Based on this, therefore the primary mesh of the present invention be to provide a kind of electret miaow head double-click acoustic control detection trigger circuit and
Illuminating lamp is lighted in the sound control circuit false triggering that method, the circuit and method are capable of anti-stop-band electret miaow head, causes electricity consumption to waste.
It is that providing a kind of electret miaow head double-clicks acoustic control detection trigger circuit and method another mesh of the present invention, should
Circuit and method realize that cost is low by the peripheral circuit of low cost and special algorithm, and detection accurately and reliably, can be effectively
Save electric energy.
To achieve the above object, the technical scheme is that：
A kind of electret miaow head double-clicks acoustic control detection trigger circuit, it is characterised in that the detection circuit includes sound collection
Circuit, sound amplifying circuit and sound comparison circuit；Wherein,
The sound collection circuit include electret miaow head microphone, biasing resistor R2, electric capacity C4, resistance R8 and
Coupled capacitor C3,5V power supply connection biasing resistor R2 one end, the R2 other ends and electric capacity C4, resistance R8, electret miaow head
Microphone and coupled capacitor C3 one end are connected, and electric capacity C4, resistance R8 and electret miaow head microphone's is another
End is grounded, C3 another termination sound amplifying circuit；
The sound amplifying circuit includes resistance R3, R4, electric capacity C5 and triode Q3, R3 and R4 one end meet 5V
Power supply, the R3 other end are connected with electric capacity C3 and triode Q3 base stage, triode Q3 colelctor electrodes and resistance R4 and electric capacity C5 mono-
End and LM393 are connected, and the emitter stage of triode is connected to ground, and the C5 other end is connected to ground；
The sound comparison circuit includes adjustable resistance RV1, LM393 and resistance R5, adjustable resistance RV1, LM393
A pin and resistance R5 one end be all connected to 5V power supplys, mono- pin ground connection of adjustable resistance RV1, a pin centre cap connects
LM393；LM393 pin ground connection, a pin connect 5V power supplys, and a pin is connected with the R5 other end, meanwhile, it is connected with R5
Pin is that acoustic control detects I/O.
A kind of electret miaow head double-clicks acoustic control detection trigger method, it is characterised in that this method comprises the following steps：
101st, sound collection circuit collected sound signal；
102nd, sound amplifying circuit is amplified to voice signal, and is exported and given sound comparison circuit；
103rd, sound comparison circuit carries out acoustic contrast, and preset sound threshold values is compared with the voice signal clapped hands；When
Electret miaow head catch sound amplification, with LM393 set level threshold values compared with after, voice signal is more than sound control circuit
During the threshold values of setting, having low level output at MIC_OUT ends, (sound level not high oversampling circuit is high electricity when setting level threshold values
It is flat), i.e. trailing edge triggering mode utilizes MCU external interrupt trailing edge Trigger Function, when MIC_OUT mouth trailing edges come, journey
Sequence can enter interrupt routine, and calculate and clap hands the time；
During the 1st entrance external interrupt subprogram, the register clap_cnt clear 0 for number of clapping hands is recorded, while timing
The register Count_time for being used for two sound waves (high level time between former and later two trailing edges) interval timing in device interruption
Clear 0, count single and clap hands that detection duration register Clap_onetime is clear 0, counts the detection duration register Clap_ that claps hands twice
Twotime clear 0, and long-time voiceless sound trigger flag position B_OverTime are set to 0.Trailing edge etc. following external interrupt comes
When, first judge whether Count_time value is more than 50, if Count_time value is less than 50, it was demonstrated that former and later two sound waves
Interval time is less than 200ms, it is impossible to regards as the interval between clapping hands twice, Count_time value will be reset.
Once Count_time is more than 50, current Clap_onetime value is calculated, if Clap_onetime values subtract
Count_time value is converted into the time and is less than 350ms, then the action that judges to clap hands for the first time is completed, metering register of clapping hands
Clap_cnt puts 1, and Clap_onetime is counted single and clapped hands duration register clear 0, prepares to count duration of clapping hands for the second time,
Count_time clear 0 simultaneously.If the value that Clap_onetime values subtract Count_time is more than 400ms, then it is assumed that sound herein
It is invalid, clear 0, the Clap_onetime of clear 0, the Count_time of clap_cnt clear 0, and Clap_twotime also clear 0, wait
Next pulse come restart detect sound.
104th, light illuminating lamp or start to control other equipment to work.
After acoustic timing of clapping hands for the second time starts, after being consecutively detected one or more short pulses, if
Count_time is more than or equal to 50, has no and detects trailing edge, calculates Clap_onetime when clapping hands for the second time and subtracts
Count_time【Count_time values are 50】Whether it is less than 350ms, while calculates whether Clap_twotime is less than 250, such as
Really bar part meets then to think that double-clicking (continuously clapping hands twice) detects successfully, lights illuminating lamp or starts to control other equipment simultaneously
Work.
Then next trailing edge pulse double-clicks detection to restart again etc., equally clap_cnt it is clear 0,
Count_time is clear 0, Count_onetime clear 0 and Count_twotime clear 0, if MIC_OUT is for a long time (more than 1 second
Clock) there is no trailing edge, then B_OverTime mark positions 1, when waiting the trailing edge, B_OverTime is set to 0, while handle
Clap_cnt, clap_cnt, Count_onetime, Count_twotime all clear 0, start detection and double-click acoustic control.
The timer interruption time is 4ms, normal per 4ms times Count_time value plus 1, if Count_time values are
50, then timing time 200ms, other registers counted calculating times are identical, and Count_time timing is from MIC_
OUT waveforms draw high beginning timing, are high level lasting times between two trailing edges, are not that MIC_OUT drags down beginning timing.
The present invention uses the acoustic control detection trigger circuit and method (continuously clapping hands twice) of electret miaow head, by detecting electricity
Road and special algorithm, not only can the sound control circuit false triggering of anti-stop-band electret miaow head light illuminating lamp, cause electricity consumption to waste,
And cost of implementation is low, detection accurately and reliably, can effectively save electric energy.
Brief description of the drawings
Fig. 1 is the circuit diagram for the electret miaow head acoustic control detection circuit that the present invention is implemented.
Fig. 2 is institute's acoustic control detection circuit MIC_OUT of the present invention output waveform figure.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Shown in Fig. 1, the structural representation that circuit implemented, in the present embodiment, sound are detected for electret miaow head acoustic control of the present invention
Control detection circuit includes sound collection circuit 101, sound amplifying circuit 102, sound comparison circuit 103.
In the present embodiment, the one of 5V power supplys connection microphone biasing resistors R2 in the sound collection circuit 101
End, the R2 other ends are connected with electric capacity C4, resistance R8, electret miaow head microphone and coupled capacitor C3 one end, electric capacity
C4, resistance R8 and electret miaow head the microphone other end are grounded, the electricity of C3 another termination sound amplifying circuit 102
Hinder R3 one end and triode Q3 base stage.In sound amplifying circuit R3 one termination 5V power supplys, and with resistance R4, adjustable resistance
RV1, LM393 8 pin and the connection of resistance R5 one end, the R3 other end are connected with electric capacity C3 and triode Q3 base stage, three poles
Pipe Q3 colelctor electrodes are connected with 2 pin of resistance R4 and electric capacity C5 one end and LM393, and the emitter stage of triode is connected to ground, C5's
The other end is connected to ground.The pin of adjustable resistance RV1 the 3rd are grounded in sound comparison circuit 103, and 2 pin centre caps connect the 3rd of LM393
Pin, LM393 the 8th pin connect 5V power supplys, the 4th pin ground connection, and the 1st pin is connected with the R5 other end, and R5 one end is connected with 5V power supplys, separately
One termination LM393 the 1st pin, while the 1st pin is that acoustic control detects I/O.
The detection method realized of the present invention be by MCU outside trailing edge interrupt with timer interruption tally function come
Realize, shown in reference picture 2, Fig. 2 waveform is actual MIC_OUT output waveform, when the voltage of the pin of LM393 the 2nd is higher than the 3rd
During pin, MIC_OUT output low levels.I.e. when the sound amplification that electret miaow head is caught, the level valve set with the pin of LM393 the 3rd
After value is compared, when voice signal is more than the threshold values that sound control circuit is set, there is low level output (sound electricity at MIC_OUT ends
Flat not high oversampling circuit is high level when setting level threshold values), i.e. trailing edge triggering mode utilizes MCU external interrupt trailing edge
Trigger Function, when MIC_OUT mouth trailing edges come, program can enter interrupt routine, when entering external interrupt subprogram the 1st time,
Record is clapped hands the register clap_cnt clear 0 of number, while being used for two sound waves (former and later two trailing edges in timer interruption
Between high level time) interval timing register Count_time it is clear 0, count single and clap hands detection duration register Clap_
Onetime is clear 0, counts clap hands twice detection duration register Clap_twotime clear 0 and long-time voiceless sound trigger flag
Position B_OverTime is set to 0.When trailing edge etc. following external interrupt comes, first judge whether Count_time value is more than 50
(in Fig. 2 numeral 1~9 gap be Count_time test section), if Count_time value be less than 50, it was demonstrated that it is preceding
The interval time of latter two sound wave is less than 200ms, it is impossible to regards as the interval between clapping hands twice, Count_time value is clear
Zero.Once Count_time is more than 50, current Clap_onetime value is calculated, if Clap_onetime values subtract
Count_time value is converted into the time and is less than 350ms【Count_time is the interval time between two sound waves, and two are spaced
Time is smaller, illustrates to be unlikely to be the gap between clapping hands twice, when Count_time numerical value is more than 50, it was demonstrated that former and later two pulses
It is possible to as the gap between clapping hands twice, Clap_onetime time is subtracted when being spaced between Count_time claps hands twice
Between, it is possible to for the time of sound of clapping hands for the first time, as 1th claps hands duration in figure, if to subtract each other result too big (i.e. singly for two values
Secondary sound duration of clapping hands is oversize), do not meet the rule normally clapped hands】, then action completion of clapping hands for the first time, meter of clapping hands are judged
Secondary register clap_cnt puts 1, and Clap_onetime is counted single and clapped hands duration register clear 0, prepares to count second
Clap hands duration, while Count_time clear 0.If the value that Clap_onetime values subtract Count_time is more than 400ms, recognize
It is invalid for sound herein, clear 0, the Clap_onetime of clear 0, the Count_time of clap_cnt clear 0, and Clap_twotime
Clear 0, next pulse is waited to restart to detect sound.
After acoustic timing of clapping hands for the second time starts, after being consecutively detected one or more short pulses, if
Count_time is more than or equal to 50, has no and detects trailing edge, calculates Clap_onetime when clapping hands for the second time and subtracts
Count_time【Count_time values are 50】Whether 350ms is less than, i.e., 2th claps hands duration in figure, while calculates Clap_
Whether twotime is less than 250, thinks that double-clicking (continuously clapping hands twice) detects successfully, lights illumination if condition meets simultaneously
Lamp starts to control other equipment to work.Again next trailing edge pulse double-clicks detection to restart etc., equally clap_
Cnt is clear 0, Count_time is clear 0, Count_onetime clear 0 and Count_twotime clear 0, if MIC_OUT is (super for a long time
Spend 1 second) there is no trailing edge, then B_OverTime mark positions 1, when waiting the trailing edge, B_OverTime is set to 0, together
When clap_cnt, clap_cnt, Count_onetime, Count_twotime all clear 0, start detection and double-click acoustic control.
The timer interruption time is 4ms, normal per 4ms times Count_time value plus 1, if Count_time values are
50, then timing time 200ms, other registers counted calculating times are identical, and Count_time timing is from MIC_
OUT waveforms draw high beginning timing, are high level lasting times between two trailing edges, are not that MIC_OUT drags down beginning timing.
Therefore, the present invention uses the acoustic control detection trigger circuit and method (continuously clapping hands twice) of electret miaow head, passes through
Detect circuit and special algorithm, not only can the sound control circuit false triggering of anti-stop-band electret miaow head light illuminating lamp, cause to use
Electricity wastes, and cost of implementation is low, and detection accurately and reliably, can effectively save electric energy.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of electret miaow head double-clicks acoustic control detection trigger circuit, it is characterised in that the detection circuit includes sound collection electricity
Road, sound amplifying circuit and sound comparison circuit；The sound collection circuit is connected to sound amplifying circuit, sound amplifying circuit
It is connected to sound comparison circuit.
2. electret miaow head as claimed in claim 1 double-clicks acoustic control detection trigger circuit, it is characterised in that the sound collection
Circuit includes electret miaow head microphone, biasing resistor R2, electric capacity C4, resistance R8 and coupled capacitor C3,5V power supply and connected
Meet biasing resistor R2 one end, the R2 other ends and electric capacity C4, resistance R8, electret miaow head microphone and coupled capacitor C3
One end be connected, electric capacity C4, resistance R8 and electret miaow head the microphone other end are grounded, C3 another termination sound
Amplifying circuit.
3. electret miaow head as claimed in claim 2 double-clicks acoustic control detection trigger circuit, it is characterised in that the sound amplification
Circuit includes resistance R3, R4, electric capacity C5 and triode Q3, R3 and R4 one end connect 5V power supplys, the R3 other end and electric capacity
C3 connects with triode Q3 base stage, and triode Q3 colelctor electrodes are connected with resistance R4 and electric capacity C5 one end and LM393, triode
Emitter stage be connected to ground, the C5 other end is connected to ground.
4. electret miaow head as claimed in claim 3 double-clicks acoustic control detection trigger circuit, it is characterised in that the sound compares
Circuit includes adjustable resistance RV1, LM393 and resistance R5, adjustable resistance RV1, LM393 a pin and resistance R5 one end
5V power supplys, mono- pin ground connection of adjustable resistance RV1 are all connected to, a pin centre cap meets LM393；LM393 pin ground connection,
One pin connects 5V power supplys, and a pin is connected with the R5 other end, meanwhile, the pin being connected with R5 is that acoustic control detects I/O.
5. a kind of electret miaow head double-clicks acoustic control detection trigger method, it is characterised in that this method comprises the following steps：
101st, sound collection circuit collected sound signal；
102nd, sound amplifying circuit is amplified to voice signal, and is exported and given sound comparison circuit；
103rd, sound comparison circuit carries out acoustic contrast, and preset sound threshold values is compared with the voice signal clapped hands；
104th, light illuminating lamp or start to control other equipment to work.
6. electret miaow head as claimed in claim 5 double-clicks acoustic control detection trigger method, it is characterised in that when electret miaow head
Seizure sound amplification, with LM393 set level threshold values compared with after, voice signal be more than sound control circuit set threshold values
When, there is low level output at MIC_OUT ends, using MCU external interrupt trailing edge Trigger Function, when MIC_OUT mouth trailing edges
When coming, program can enter interrupt routine, and calculate and clap hands the time.
7. electret miaow head as claimed in claim 6 double-clicks acoustic control detection trigger method, it is characterised in that the 1st entrance is outside
During interruption subroutine, record is clapped hands the register clap_cnt clear 0 of number, while being used in timer interruption between two sound waves
Every the register Count_time of timing it is clear 0, count single and clap hands that detection duration register Clap_onetime is clear 0, counts two
The secondary detection duration register Clap_twotime clear 0 that claps hands, and long-time voiceless sound trigger flag position B_OverTime are set to 0；
When trailing edge etc. following external interrupt comes, first judge whether Count_time value is more than 50, if Count_time
Value is less than 50, it was demonstrated that the interval time of former and later two sound waves is less than 200ms, it is impossible to the interval between clapping hands twice is regarded as,
Count_time value will be reset.
8. electret miaow head as claimed in claim 7 double-clicks acoustic control detection trigger method, it is characterised in that once Count_
Time is more than 50, calculates current Clap_onetime value, if Clap_onetime values subtract Count_time value conversion
It is less than 350ms into the time, then judges action completion of clapping hands for the first time, the metering register clap_cnt that claps hands puts 1, and Clap_
Onetime counts single and clapped hands duration register clear 0, prepares to count clap hands for the second time duration, while Count_time clear 0；If
The value that Clap_onetime values subtract Count_time is more than 400ms, then it is assumed that and sound is invalid herein, clap_cnt clear 0,
Clear 0, the Clap_onetime of Count_time clear 0, and Clap_twotime also clear 0, wait next pulse to restart
Detect sound.
9. electret miaow head as claimed in claim 8 double-clicks acoustic control detection trigger method, it is characterised in that is clapped hands when for the second time
After acoustic timing starts, after being consecutively detected one or more short pulses, if Count_time be more than or equal to 50, and
Without trailing edge is detected, calculate Clap_onetime when clapping hands for the second time and subtract whether Count_time is less than 350ms, simultaneously
Calculate whether Clap_twotime is less than 250, think to double-click if condition meets simultaneously and detect successfully, light illuminating lamp or open
Begin to control other equipment work.
10. electret miaow head as claimed in claim 9 double-clicks acoustic control detection trigger method, it is characterised in that during timer interruption
Between be 4ms, it is normal per 4ms times Count_time value plus 1, if Count_time values are 50, then timing time is
200ms, other registers counted calculating times are identical, and Count_time timing is counted since being drawn high MIC_OUT waveforms
When, it is high level lasting time between two trailing edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086107.2A CN107750037A (en) | 2017-11-07 | 2017-11-07 | A kind of electret miaow head double-clicks acoustic control detection trigger circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711086107.2A CN107750037A (en) | 2017-11-07 | 2017-11-07 | A kind of electret miaow head double-clicks acoustic control detection trigger circuit and method |
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| Publication Number | Publication Date |
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| CN107750037A true CN107750037A (en) | 2018-03-02 |
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| CN201711086107.2A Pending CN107750037A (en) | 2017-11-07 | 2017-11-07 | A kind of electret miaow head double-clicks acoustic control detection trigger circuit and method |
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| CN106793388A (en) * | 2016-12-07 | 2017-05-31 | 广西大学 | A kind of illuminating lamp acousto-optic inductive control circuit of stable work in work |
| CN106875512A (en) * | 2017-03-29 | 2017-06-20 | 桂林电子科技大学 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
| CN207612405U (en) * | 2017-11-07 | 2018-07-13 | 芯海科技（深圳）股份有限公司 | A kind of electret microphone double-click acoustic control detection trigger circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1728235A (en) * | 2004-07-30 | 2006-02-01 | 华为技术有限公司 | Device and method for detecting sound type |
| CN202612168U (en) * | 2012-06-14 | 2012-12-19 | 谢安军 | Control circuit for electric fan intermittent work |
| CN103957635A (en) * | 2014-04-28 | 2014-07-30 | 梁涛 | On-off device and control realization method thereof |
| CN105360004A (en) * | 2015-11-25 | 2016-03-02 | 魏晓慧 | Bark stopper and bark stopping method |
| CN106793388A (en) * | 2016-12-07 | 2017-05-31 | 广西大学 | A kind of illuminating lamp acousto-optic inductive control circuit of stable work in work |
| CN106875512A (en) * | 2017-03-29 | 2017-06-20 | 桂林电子科技大学 | A kind of vehicle-mounted intelligent monitoring system based on sound bearing identification |
| CN207612405U (en) * | 2017-11-07 | 2018-07-13 | 芯海科技（深圳）股份有限公司 | A kind of electret microphone double-click acoustic control detection trigger circuit |
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