CN103747393B - Control circuit of wireless microphone - Google Patents
Control circuit of wireless microphone Download PDFInfo
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- CN103747393B CN103747393B CN201410036935.5A CN201410036935A CN103747393B CN 103747393 B CN103747393 B CN 103747393B CN 201410036935 A CN201410036935 A CN 201410036935A CN 103747393 B CN103747393 B CN 103747393B
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Abstract
The invention discloses a control circuit of a wireless microphone. The control circuit of the wireless microphone comprises a microprocessor, an audio collecting circuit, an audio compressing circuit, an audio emission circuit, a powering supply, a gesture monitoring sensor and a mute control circuit; the signal output end of the gesture monitoring sensor is connected with the microprocessor of which the mute control signal output end is connected with the control signal input end of the mute control circuit; the audio signal output end of the audio collecting circuit is connected with the audio compressing circuit of which the output end is connected with the audio emission circuit by the mute control circuit; after the time that the angle or position of the microphone does not change achieves the timing of a first stage, the microprocessor cuts off the audio signal, entering the audio emission circuit, of the audio compressing circuit by the mute control circuit. A sound loop can be timely closed and restored, silencing is timely performed as far as possible under the condition that the use of a user is not influenced, squealing is avoided, and the use time and service life of a wireless microphone power supply are prolonged.
Description
[technical field]
The present invention relates to wireless microphone, relate in particular to a kind of control circuit of wireless microphone.
[background technology]
For a long time, wireless microphone in use, is controlled the just modulation to its carrier frequency of thinking, the adjusting of the common functions such as power adjustments and demonstration.But in use; often there will be the unconscious opposite that microphone is placed on to sound equipment; because an external noise just there will be very strong uttering long and high-pitched sounds, although prime noise elimination can weaken this phenomenon to a certain extent, still have most microphones and occur Similar Problems like this.Wireless microphone simultaneously, use be portable power source, but seem for a long time because the problem of use occasion, everybody not too payes attention to power saving, uses power consumption reducing it often, extends working time.
[summary of the invention]
The technical problem to be solved in the present invention is to provide the timely noise elimination of a kind of energy, prevents the wireless microphone control circuit of uttering long and high-pitched sounds.
The technical problem to be solved in the present invention is to provide a kind of wireless microphone control circuit of good energy-conserving effect.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a control circuit for wireless microphone, comprises posture monitoring sensor and the muting control circuit of microprocessor, audio collection circuit, audio compression circuit, audio frequency radiating circuit, power supply, monitoring microphone angle and change in location; The signal output part of posture monitoring sensor connects microprocessor, the control signal input of the quiet control signal output termination muting control circuit of microprocessor, the audio signal output end of audio collection circuit connects audio compression circuit, and the output of audio compression circuit connects audio frequency radiating circuit by muting control circuit; The time that the angle of microphone or position do not change reaches after first stage timing, and microprocessor cuts off by muting control circuit the audio signal that audio compression circuit enters audio frequency radiating circuit.
Above-described control circuit, comprises power-supplying circuit, and audio frequency radiating circuit connects power supply by power-supplying circuit, the economize on electricity control signal output of the control signal input termination microprocessor of power-supplying circuit; The time that the angle of microphone or position do not change reaches after second stage timing, and the power supply that microprocessor cuts off audio compression circuit and audio frequency radiating circuit by power-supplying circuit is inputted.
Above-described control circuit, comprises power supply output control circuit, and power supply output control circuit connects the output of power supply, the pass machine control signal output of the control signal input termination microprocessor of power supply output control circuit; The time that the angle of microphone or position do not change reaches after phase III timing, and microprocessor cuts off the output of power supply by power supply output control circuit.
Above-described control circuit, audio frequency radiating circuit comprises audio frequency loaded circuit, carrier generating circuit and signal amplification circuit, the output of carrier generating circuit and muting control circuit connects respectively audio frequency loaded circuit, the output termination signal amplification circuit of audio frequency loaded circuit; The control signal input of carrier generating circuit and the control signal input of signal amplification circuit connect respectively microprocessor.
Above-described control circuit, posture monitoring sensor is earth induction chip or gyroscope induction chip.
Wireless microphone control circuit of the present invention, can cut out timely sound loop and recover in time, and in the situation that not affecting user's use, noise elimination, prevents from uttering long and high-pitched sounds as far as possible timely, and extends service time and the useful life of wireless microphone power supply.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the control flow chart of the control circuit of embodiment of the present invention wireless microphone.
Fig. 2 is the quiet control principle block diagram of the control circuit of embodiment of the present invention wireless microphone.
Fig. 3 is the control circuit Energy Saving Control theory diagram of embodiment of the present invention wireless microphone.
[embodiment]
The structure of the control circuit of embodiment of the present invention wireless microphone and control method as shown in Figure 1 to Figure 3, comprise microprocessor (CPU), audio collection circuit, audio compression circuit, audio frequency radiating circuit, power supply, posture monitoring sensor, power-supplying circuit, power supply output control circuit and muting control circuit.
Posture monitoring sensor is used for monitoring the variation of microphone angle and position, judges whether the have living space change of position of microphone.The signal output part of posture monitoring sensor connects microprocessor; When user's hand takes microphone to be, posture monitoring sensor is constantly to microprocessor output postural change signal; Posture monitoring sensor can adopt earth induction chip or gyroscope induction chip, and gyroscope chip is as the MPU6050 of INVEN SENSE or ITG3050.CPU reads the data of posture monitoring sensor output, thereby the current residing posture state of judgement microphone is static or motion.
The control signal input of the quiet control signal output termination muting control circuit of microprocessor, the audio signal output end of audio collection circuit connects audio compression circuit, and the output of audio compression circuit connects audio frequency radiating circuit by muting control circuit; The angle of microphone or position do not change ordinary representation microphone not at use state, in the angle of microphone or the time of invariant position, reach after first stage timing, microprocessor cuts off by muting control circuit the audio signal that audio compression circuit enters audio frequency radiating circuit.
Audio frequency radiating circuit comprises audio frequency loaded circuit, carrier generating circuit and signal amplification circuit.The output of carrier generating circuit and muting control circuit connects respectively audio frequency loaded circuit, the output termination signal amplification circuit of audio frequency loaded circuit.Together with the carrier wave that signal after audio compression generates with carrier generating circuit (phase-locked loop+voltage controlled oscillator) is carried in, through signal amplification circuit, amplify, then by antenna circuit, launch.
The control signal input of carrier generating circuit and the control signal input of signal amplification circuit connect respectively microprocessor.
Audio frequency radiating circuit connects power supply by power-supplying circuit, the economize on electricity control signal output of the control signal input termination microprocessor of power-supplying circuit; The angle of microphone or the time of invariant position reach after second stage timing, and the power supply that microprocessor cuts off audio compression circuit and audio frequency radiating circuit by power-supplying circuit is inputted.Three power control loop (audio compression circuit supplies independently, carrier generating circuit power supply, signal amplification circuit power supply), cut off respectively the power supply of these main power consumption modules, thereby reach efficient energy-saving effect, although now CPU and posture monitoring sensor are also in work, power consumption is only 20% of the total power consumption of microphone.
Power supply output control circuit connects the output of power supply, the pass machine control signal output of the control signal input termination microprocessor of power supply output control circuit; The time that the angle of microphone or position do not change reaches after phase III timing, and microprocessor cuts off the output of power supply by power supply output control circuit, realizes complete machine and has a power failure.
Muting control circuit, power-supplying circuit and power supply output control circuit can adopt various electronic switches, as triode, metal-oxide-semiconductor etc.
Before in the end closing general supply, if the attitude of microphone changes, carry out intelligent awakening function.Each stage is waken degree difference up.If in the first stage, only need to recover audio compression and audio frequency emission function.If in second stage, need to after recover the power supply of each module, carry out waking up of each module and recover action, such as carrier generating circuit, regenerate carrier frequency etc.
The timing time in each stage, can regulate according to user's use habit.The above embodiment noise elimination of the present invention, energy-conservation Based Intelligent Control pattern can be switched to normal mode of operation by button.In some occasion, as microphone is placed on bracing frame, the attitude of microphone is fixed, so user can select to close Based Intelligent Control by button, is converted to conventional use.
The above embodiment of the present invention can close timely sound loop and recover in time, and in the situation that not affecting user's use, noise elimination, prevents from uttering long and high-pitched sounds as far as possible in time.Simultaneously can be according to user's service condition, phase in intelligent power saving, thereby service time and the useful life of prolongation wireless microphone power supply.
Claims (3)
1. the control circuit of a wireless microphone, comprise microprocessor, audio collection circuit, audio compression circuit, audio frequency radiating circuit and power supply, it is characterized in that, control circuit comprises posture monitoring sensor and the muting control circuit of power-supplying circuit, power supply output control circuit, monitoring microphone angle and change in location; The signal output part of posture monitoring sensor connects microprocessor, the control signal input of the quiet control signal output termination muting control circuit of microprocessor, the audio signal output end of audio collection circuit connects audio compression circuit, and the output of audio compression circuit connects audio frequency radiating circuit by muting control circuit; The time that the angle of microphone or position do not change reaches after first stage timing, and microprocessor cuts off by muting control circuit the audio signal that audio compression circuit enters audio frequency radiating circuit; Audio frequency radiating circuit connects power supply by power-supplying circuit, the economize on electricity control signal output of the control signal input termination microprocessor of power-supplying circuit; The time that the angle of microphone or position do not change reaches after second stage timing, and the power supply that microprocessor cuts off audio compression circuit and audio frequency radiating circuit by power-supplying circuit is inputted; Power supply output control circuit connects the output of power supply, the pass machine control signal output of the control signal input termination microprocessor of power supply output control circuit; The time that the angle of microphone or position do not change reaches after phase III timing, and microprocessor cuts off the output of power supply by power supply output control circuit.
2. control circuit according to claim 1, it is characterized in that, audio frequency radiating circuit comprises audio frequency loaded circuit, carrier generating circuit and signal amplification circuit, the output of carrier generating circuit and muting control circuit connects respectively audio frequency loaded circuit, the output termination signal amplification circuit of audio frequency loaded circuit; The control signal input of carrier generating circuit and the control signal input of signal amplification circuit connect respectively microprocessor.
3. control circuit according to claim 1, is characterized in that, posture monitoring sensor is earth induction chip or gyroscope induction chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036935.5A CN103747393B (en) | 2014-01-25 | 2014-01-25 | Control circuit of wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410036935.5A CN103747393B (en) | 2014-01-25 | 2014-01-25 | Control circuit of wireless microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103747393A CN103747393A (en) | 2014-04-23 |
| CN103747393B true CN103747393B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410036935.5A Active CN103747393B (en) | 2014-01-25 | 2014-01-25 | Control circuit of wireless microphone |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509140A (en) * | 2017-09-29 | 2017-12-22 | 李俊和 | A kind of human body sensing wireless microphone |
| CN111610845A (en) * | 2020-05-20 | 2020-09-01 | 海南大学 | Intelligent power-saving microphone based on acceleration sensor and electric energy management method and device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6968070B1 (en) * | 2004-07-22 | 2005-11-22 | Kun-Tien Chiang | Microphone |
| US8712362B2 (en) * | 2008-07-26 | 2014-04-29 | Enforcement Video, Llc | Method and system of extending battery life of a wireless microphone unit |
| CN201639753U (en) * | 2010-01-14 | 2010-11-17 | 上海华平信息技术股份有限公司 | Noise reduction microphone |
| CN203251407U (en) * | 2013-04-17 | 2013-10-23 | 周宣涛 | Wireless microphone |
| CN203289603U (en) * | 2013-06-04 | 2013-11-13 | 天津宽明科技有限公司 | Wireless microphone |
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| CN103747393A (en) | 2014-04-23 |
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