CN103347240A - Wireless handheld microphone - Google Patents
Wireless handheld microphone Download PDFInfo
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- CN103347240A CN103347240A CN2013102758090A CN201310275809A CN103347240A CN 103347240 A CN103347240 A CN 103347240A CN 2013102758090 A CN2013102758090 A CN 2013102758090A CN 201310275809 A CN201310275809 A CN 201310275809A CN 103347240 A CN103347240 A CN 103347240A
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Abstract
The invention provides a wireless handheld microphone. The wireless handheld microphone comprises a sound head, a voice-frequency circuit and a microphone circuit, wherein the sound head, the voice-frequency circuit and the microphone circuit are sequentially connected. The wireless handheld microphone is characterized by further comprising an acceleration sensing circuit. The accelerated speed sensing circuit comprises an acceleration sensor and a processing circuit. The acceleration sensor is connected with the microphone circuit through the processing circuit. According to the wireless handheld microphone, the acceleration sensor senses whether the microphone is in a handheld state, so that automatic start-up or power close-down of the microphone is controlled, effective and stable working voltage is provided for the microphone, the energy consumption of the microphone is effectively lowered, and the service life of the microphone is prolonged.
Description
Technical field
The present invention relates to the wireless handheld microphone, be specifically related to the wireless handheld microphone of automatic switch.
Background technology
Microphone as a kind of electroacoustic apparatus, is widely used in occasions such as school, law court, government organs, meeting room and KTV.At present, wireless handheld microphone on the market all is the startup and shutdown of controlling microphone with button.Each start, shutdown all will manually be operated by button, do not close microphone when the user often puts down microphone, allow microphone continue opening, and can cause unnecessary energy consumption like this, cause the service time of energy waste and shortening battery.
Summary of the invention
At above-mentioned prior art deficiency, the technical problem to be solved in the present invention provides a kind of wireless handheld microphone that can automatic switch.
For solving the problems of the technologies described above, the technical solution used in the present invention is that the wireless handheld microphone comprises the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; Also comprise the acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit.Such structure judges by acceleration transducer whether microphone is used, thereby is operated by the automatic switch of processing circuit controls microphone circuit.
Optimized technical scheme is that described acceleration transducer is the LIS3DH chip; The 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and first pin, the 8th pin and the 14 pin all are connected with positive supply BAT+, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; The SCL end is connected with treatment circuit as signal output part with the SDA end.
Further technical scheme is that described treatment circuit comprises single-chip microcomputer, power supply circuits and control circuit; Single-chip microcomputer is connected with the output of acceleration transducer; The input of power supply circuits is connected with single-chip microcomputer, and the power supply output of power supply circuits is connected with the power end of microphone circuit; The input of control circuit is connected with single-chip microcomputer, and the output of control circuit is connected with the switch terminals of microphone circuit.Such structure makes microphone circuit provide operating voltage by power supply circuits, and by control circuit control automatic switch, good working effect, wherein, the switch terminals of microphone circuit refers to the node that microphone circuit Central Plains cause key switch is connected.
Further technical scheme is, described power supply circuits comprise resistance R 1, resistance R 2, field effect transistor Q1 and capacitor C 6; One end of resistance R 2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R 2 is connected to the grid of field effect transistor Q1; The grid of field effect transistor Q1 is connected to the anode of field effect transistor Q1 by resistance R 1; The anode of field effect transistor Q1 also is connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by capacitor C 6 ground connection; The negative electrode of field effect transistor Q1 is connected with the power end of microphone circuit as power supply output VCC_OUT.Such structure enables the stable operating voltage of power supply circuits output, guarantees the result of use of microphone, and effectively realizes the function of automatic switch.
Preferably, described single-chip microcomputer is the STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and first pin is connected with the output of acceleration transducer as input with three-prong, the 4th pin ground connection, and the 7th pin is connected with the input of power supply circuits as the V_OUT pin.
Further technical scheme is that described control circuit comprises resistance R 3, resistance R 4, resistance R 5, field effect transistor Q2, transistor Q3 and transistor Q4; The negative electrode of transistor Q3 is connected with the C_OUT pin of single-chip microcomputer as the input of control circuit, and the base stage of transistor Q3 is connected with positive supply BAT+ by resistance R 6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R 4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R 3, and the anode of field effect transistor Q2 is connected to positive supply BAT+; The negative electrode of field effect transistor Q2 is connected to the base stage of transistor Q4, the minus earth of transistor Q4 by resistance R 5; The negative electrode of field effect transistor Q2 is as high level output H_OUT, and the anode of transistor Q4 is as low level output L_OUT, and high level output H_OUT or low level output L_OUT are connected with the switch terminals of microphone circuit.Such structure can effectively be exported stable starting-up signal, guarantees the realization of auto-switch function.Wherein, microphone circuit generally has high level start and low level to start shooting two kinds, and such structure can also guarantee the compatibility with original microphone circuit, and high level start or level start all can be used.
Preferably, described single-chip microcomputer is the STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and first pin is connected with the output of acceleration transducer as input with three-prong, the 4th pin ground connection, and the 8th pin is connected with output circuit as the C_OUT pin.
More preferably, first pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 7, and second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 8.
More preferably, after capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4 and 5 five capacitor parallel connections of capacitor C, be connected between positive supply BAT+ and the ground; Wherein the capacitance value of capacitor C 1, capacitor C 2 and capacitor C 3 is 0.8 μ F-1.5 μ F, and the capacitance value of capacitor C 4 and capacitor C 5 is 80nF-150nF.
Whether wireless handheld microphone of the present invention is in hand holding state by the acceleration transducer inductive microphone, thereby Auto Power On or the shutdown of control microphone, and can provide effective, stable operating voltage for microphone, and can effectively reduce the energy consumption of microphone, prolong the useful life of microphone.
Description of drawings
Fig. 1 is the structural representation of wireless handheld microphone of the present invention.
Fig. 2 is the acceleration sensor structure schematic diagram of wireless handheld microphone of the present invention.
Fig. 3 is the treatment circuit structural representation of wireless handheld microphone of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, wireless handheld microphone of the present invention comprises the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; It is characterized in that: also comprise the acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit.Wherein, pick-up head, voicefrequency circuit and microphone circuit are not improvement main points of the present invention, can adopt existing interlock circuit to realize, do not repeat them here.Whether acceleration transducer has acceleration change for detection of microphone, thereby judges transfixion is picked up, holds and put down to microphone whether, thereby controls the opening and closing of microphone automatically.When hanging on, acceleration transducer has been sensed acceleration change, and microphone is opened automatically; When holding microphone, microphone has slight motion, and acceleration transducer has been sensed acceleration change, and microphone is held open state; When putting down the microphone transfixion, acceleration transducer is sensed does not have acceleration change, and microphone is closed automatically.
As shown in Figure 2, described acceleration transducer is the LIS3DH chip; The 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and first pin, the 8th pin and the 14 pin all are connected with positive supply BAT+, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; The SCL end is connected with treatment circuit as signal output part with the SDA end.Such structure applications is in the circuit part of microphone, can effectively dwindle the package area of this chip, and because under the hand-held state, the action of microphone is less, this chip is proposed the sensitivity of energy high-sensitivity detection, the realization of assurance function, the energy consumption of chip is low simultaneously, still can keep superperformance under working long hours.
As shown in Figure 3, described treatment circuit comprises single-chip microcomputer, power supply circuits and control circuit; Single-chip microcomputer is connected with the output of acceleration transducer; The input of power supply circuits is connected with single-chip microcomputer, and the power supply output of power supply circuits is connected with the power end of microphone circuit; The input of control circuit is connected with single-chip microcomputer, and the output of control circuit is connected with the switch terminals of microphone circuit.
Particularly, described power supply circuits comprise resistance R 1, resistance R 2, field effect transistor Q1 and capacitor C 6; One end of resistance R 2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R 2 is connected to the grid of field effect transistor Q1; The grid of field effect transistor Q1 is connected to the anode of field effect transistor Q1 by resistance R 1; The anode of field effect transistor Q1 also is connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by capacitor C 6 ground connection; The negative electrode of field effect transistor Q1 is connected with the power end of microphone circuit as power supply output VCC_OUT.
Described control circuit comprises resistance R 3, resistance R 4, resistance R 5, field effect transistor Q2, transistor Q3 and transistor Q4; The negative electrode of transistor Q3 is connected with the C_OUT pin of single-chip microcomputer as the input of control circuit, and the base stage of transistor Q3 is connected with positive supply BAT+ by resistance R 6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R 4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R 3, and the anode of field effect transistor Q2 is connected to positive supply BAT+; The negative electrode of field effect transistor Q2 is connected to the base stage of transistor Q4, the minus earth of transistor Q4 by resistance R 5; The negative electrode of field effect transistor Q2 is as high level output H_OUT, and the anode of transistor Q4 is as low level output L_OUT, and high level output H_OUT or low level output L_OUT are connected with the switch terminals of microphone circuit.Wherein, the switch terminals of microphone circuit refers to the node that microphone circuit Central Plains cause key switch is connected, only need the dismounting of the case switch of microphone circuit down, the high level output H_OUT of control circuit or low level output L_OUT in the connection, at once directly driven the switch terminals of microphone circuit by control circuit, need not the manual operation switch by the user.Wherein, field effect transistor Q1 in the present embodiment and field effect transistor Q2 are the IRLML6401 field effect transistor, are enhancement mode P type field effect transistor, have that low-voltage, energy consumption are low, stable performance a bit, wherein anode is the source electrode of this field effect transistor only, if select the capable field effect transistor of N for use then be drain electrode.Transistor Q3, transistor Q4 are NPN type triodes, and its anode refers to collector electrode, if select positive-negative-positive for use then refer to emitter.
Described single-chip microcomputer is the STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, first pin is connected with the output of acceleration transducer as input with three-prong, the 4th pin ground connection, the 7th pin is connected with the input of power supply circuits as the V_OUT pin, and the 8th pin is connected with output circuit as the C_OUT pin.First pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 7, and second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 8.After capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4 and 5 five capacitor parallel connections of capacitor C, be connected between positive supply BAT+ and the ground; Wherein the resistance value value of resistance R 1 and resistance R 3 is 15K Ω-30K Ω, the resistance value value of resistance R 2 and resistance R 4 is 200 Ω-500 Ω, the resistance value value of resistance R 5, resistance R 6, resistance R 7 and resistance R 8 is 5K Ω-20K Ω, the capacitance value of capacitor C 1, capacitor C 2 and capacitor C 3 is 0.8 μ F-1.5 μ F, and the capacitance value of capacitor C 4 and capacitor C 5 is 80nF-150nF.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the wireless handheld microphone comprises the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; It is characterized in that: also comprise the acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit.
2. wireless handheld microphone according to claim 1, it is characterized in that: described acceleration transducer is the LIS3DH chip; The 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and first pin, the 8th pin and the 14 pin all are connected with positive supply BAT+, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; The SCL end is connected with treatment circuit as signal output part with the SDA end.
3. wireless handheld microphone according to claim 1, it is characterized in that: described treatment circuit comprises single-chip microcomputer, power supply circuits and control circuit; Single-chip microcomputer is connected with the output of acceleration transducer; The input of power supply circuits is connected with single-chip microcomputer, and the power supply output of power supply circuits is connected with the power end of microphone circuit; The input of control circuit is connected with single-chip microcomputer, and the output of control circuit is connected with the switch terminals of microphone circuit.
4. wireless handheld microphone according to claim 3, it is characterized in that: described power supply circuits comprise resistance R 1, resistance R 2, field effect transistor Q1 and capacitor C 6; One end of resistance R 2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R 2 is connected to the grid of field effect transistor Q1; The grid of field effect transistor Q1 is connected to the anode of field effect transistor Q1 by resistance R 1; The anode of field effect transistor Q1 also is connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by capacitor C 6 ground connection; The negative electrode of field effect transistor Q1 is connected with the power end of microphone circuit as power supply output VCC_OUT.
5. wireless handheld microphone according to claim 4, it is characterized in that: described single-chip microcomputer is the STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and first pin is connected with the output of acceleration transducer as input with three-prong, the 4th pin ground connection, and the 7th pin is connected with the input of power supply circuits as the V_OUT pin.
6. wireless handheld microphone according to claim 3, it is characterized in that: described control circuit comprises resistance R 3, resistance R 4, resistance R 5, field effect transistor Q2, transistor Q3 and transistor Q4; The negative electrode of transistor Q3 is connected with the C_OUT pin of single-chip microcomputer as the input of control circuit, and the base stage of transistor Q3 is connected with positive supply BAT+ by resistance R 6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R 4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R 3, and the anode of field effect transistor Q2 is connected to positive supply BAT+; The negative electrode of field effect transistor Q2 is connected to the base stage of transistor Q4, the minus earth of transistor Q4 by resistance R 5; The negative electrode of field effect transistor Q2 is as high level output H_OUT, and the anode of transistor Q4 is as low level output L_OUT, and high level output H_OUT or low level output L_OUT are connected with the switch terminals of microphone circuit.
7. wireless handheld microphone according to claim 6, it is characterized in that: described single-chip microcomputer is the STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and first pin is connected with the output of acceleration transducer as input with three-prong, the 4th pin ground connection, and the 8th pin is connected with output circuit as the C_OUT pin.
8. according to claim 5 or 7 described wireless handheld microphones, it is characterized in that: first pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 7, and second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R 8.
9. wireless handheld microphone according to claim 8 is characterized in that: after capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4 and 5 five capacitor parallel connections of capacitor C, be connected between positive supply BAT+ and the ground; Wherein the capacitance value of capacitor C 1, capacitor C 2 and capacitor C 3 is 0.8 μ F-1.5 μ F, and the capacitance value of capacitor C 4 and capacitor C 5 is 80nF-150nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275809.0A CN103347240B (en) | 2013-07-02 | 2013-07-02 | Wireless handheld microphone |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275809.0A CN103347240B (en) | 2013-07-02 | 2013-07-02 | Wireless handheld microphone |
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| CN103347240A true CN103347240A (en) | 2013-10-09 |
| CN103347240B CN103347240B (en) | 2016-02-24 |
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| CN201310275809.0A Active CN103347240B (en) | 2013-07-02 | 2013-07-02 | Wireless handheld microphone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744392A (en) * | 2016-04-06 | 2016-07-06 | 蔡华翔 | Sound-vibration double-control time-delay microphone |
| CN107820143A (en) * | 2017-10-19 | 2018-03-20 | 广州艾美网络科技有限公司 | Microphone senses hanger and program request equipment |
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| US20120284022A1 (en) * | 2009-07-10 | 2012-11-08 | Alon Konchitsky | Noise reduction system using a sensor based speech detector |
| CN202818545U (en) * | 2012-10-17 | 2013-03-20 | 杨志豪 | Wireless microphone |
| CN103096198A (en) * | 2013-01-31 | 2013-05-08 | 广州瀚诚电子产品有限公司 | Induction microphone circuit and method of achieving induction microphone |
| CN202956597U (en) * | 2012-08-17 | 2013-05-29 | 歌尔声学股份有限公司 | Electronic product capable of automatically powering on or powering off |
| CN203368749U (en) * | 2013-07-02 | 2013-12-25 | 广州瀚诚电子产品有限公司 | A wireless hand-held microphone |
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2013
- 2013-07-02 CN CN201310275809.0A patent/CN103347240B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120284022A1 (en) * | 2009-07-10 | 2012-11-08 | Alon Konchitsky | Noise reduction system using a sensor based speech detector |
| CN202956597U (en) * | 2012-08-17 | 2013-05-29 | 歌尔声学股份有限公司 | Electronic product capable of automatically powering on or powering off |
| CN202818545U (en) * | 2012-10-17 | 2013-03-20 | 杨志豪 | Wireless microphone |
| CN103096198A (en) * | 2013-01-31 | 2013-05-08 | 广州瀚诚电子产品有限公司 | Induction microphone circuit and method of achieving induction microphone |
| CN203368749U (en) * | 2013-07-02 | 2013-12-25 | 广州瀚诚电子产品有限公司 | A wireless hand-held microphone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744392A (en) * | 2016-04-06 | 2016-07-06 | 蔡华翔 | Sound-vibration double-control time-delay microphone |
| CN107820143A (en) * | 2017-10-19 | 2018-03-20 | 广州艾美网络科技有限公司 | Microphone senses hanger and program request equipment |
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| Publication number | Publication date |
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| CN103347240B (en) | 2016-02-24 |
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