CN103347240B - Wireless handheld microphone - Google Patents
Wireless handheld microphone Download PDFInfo
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- CN103347240B CN103347240B CN201310275809.0A CN201310275809A CN103347240B CN 103347240 B CN103347240 B CN 103347240B CN 201310275809 A CN201310275809 A CN 201310275809A CN 103347240 B CN103347240 B CN 103347240B
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Abstract
The present invention proposes a kind of wireless handheld microphone, comprise the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; It is characterized in that: also comprise acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit.Whether wireless handheld microphone of the present invention is in hand holding state by acceleration transducer inductive microphone, thus control Auto Power On or the shutdown of microphone, and effective, stable operating voltage can be provided for microphone, effectively can reduce the energy consumption of microphone, extend the useful life of microphone.
Description
Technical field
The present invention relates to 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 the occasions such as school, law court, government organs, meeting room and KTV.At present, wireless handheld microphone is on the market all the startup and shutdown controlling microphone with button.Each start, shutdown all will manually operate by button, do not close microphone, allow microphone continue to open, can cause unnecessary energy consumption like this when user often puts down microphone, cause the service time of energy waste and shortening battery.
Summary of the invention
Not enough for above-mentioned prior art, the technical problem to be solved in the present invention be to provide a kind of can the wireless handheld microphone of automatic switch.
For solving the problems of the technologies described above, the technical solution used in the present invention is, wireless handheld microphone, comprises the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; Also comprise acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit.By acceleration transducer, such structure judges whether microphone is used, thus operated by the automatic switch of processing circuit controls microphone circuit.
Preferred technical scheme is, described acceleration transducer is LIS3DH chip; 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and the first pin, the 8th pin are all connected with positive supply BAT+ with the 14 pin, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; SCL end is connected with treatment circuit as signal output part with SDA end.
Further technical scheme is, 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 controls automatic switch by control circuit, good working effect, and 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 R1, resistance R2, field effect transistor Q1 and electric capacity C6; One end of resistance R2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R2 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 R1; The anode of field effect transistor Q1 is also connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by electric capacity C6 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.The enable operating voltage making power supply circuits stable output of such structure, ensures the result of use of microphone, and effectively realizes the function of automatic switch.
Preferably, described single-chip microcomputer is STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and the 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 V_OUT pin.
Further technical scheme is, described control circuit comprises resistance R3, resistance R4, resistance R5, 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 R6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R3, 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 R5; The negative electrode of field effect transistor Q2 is connected with the switch terminals of microphone circuit as low level output end L_OUT, high level output end H_OUT or low level output end L_OUT as the anode of high level output end H_OUT, transistor Q4.Such structure can the starting-up signal of effective stable output, ensures the realization of auto-switch function.Wherein, microphone circuit generally has high level to start shooting and low level starts shooting two kinds, and such structure can also ensure the compatibility with original microphone circuit, and high level start or level start all can use.
Preferably, described single-chip microcomputer is STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and the 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 C_OUT pin.
More preferably, the first pin of STC15L104E chip is connected with positive supply BAT+ by resistance R7, and the second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R8.
More preferably, after electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 five capacitor parallel connections, be connected between positive supply BAT+ and ground; Wherein the capacitance value of electric capacity C1, electric capacity C2 and electric capacity C3 is 0.8 μ F-1.5 μ F, and the capacitance value of electric capacity C4 and electric capacity C5 is 80nF-150nF.
Whether wireless handheld microphone of the present invention is in hand holding state by acceleration transducer inductive microphone, thus control Auto Power On or the shutdown of microphone, and effective, stable operating voltage can be provided for microphone, effectively can reduce the energy consumption of microphone, extend the useful life of microphone.
Accompanying drawing explanation
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
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
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 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, existing interlock circuit can be adopted to realize, do not repeat them here.Whether acceleration transducer has acceleration change for detecting microphone, thus judges whether microphone is picked up, hold and put down transfixion, thus automatically controls the opening and closing of microphone.When hanging on, acceleration transducer has sensed acceleration change, and microphone is opened automatically; When holding microphone, microphone has slight motion, and acceleration transducer has sensed acceleration change, and microphone is held open state; When putting down microphone transfixion, acceleration transducer senses does not have acceleration change, and microphone is closed automatically.
As shown in Figure 2, described acceleration transducer is LIS3DH chip; 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and the first pin, the 8th pin are all connected with positive supply BAT+ with the 14 pin, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; SCL end is connected with treatment circuit as signal output part with SDA end.Such structure is applied to the circuit part of microphone, effectively can reduce the package area of this chip, and due under hand-held state, the action of microphone is less, this chip proposes the sensitivity of energy high-sensitivity detection, the realization of assurance function, the energy consumption of chip is low simultaneously, under working long hours, still can keep superperformance.
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 R1, resistance R2, field effect transistor Q1 and electric capacity C6; One end of resistance R2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R2 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 R1; The anode of field effect transistor Q1 is also connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by electric capacity C6 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 R3, resistance R4, resistance R5, 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 R6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R3, 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 R5; The negative electrode of field effect transistor Q2 is connected with the switch terminals of microphone circuit as low level output end L_OUT, high level output end H_OUT or low level output end L_OUT as the anode of high level output end H_OUT, transistor Q4.Wherein, the switch terminals of microphone circuit refers to the node that microphone circuit Central Plains cause key switch is connected, only need under the dismounting of the case switch of microphone circuit, the high level output end H_OUT of control circuit or low level output end L_OUT in connection, at once directly the switch terminals of microphone circuit is driven by control circuit, without the need to by user's manual operation switch.Wherein, field effect transistor Q1 in the present embodiment and field effect transistor Q2 is IRLML6401 field effect transistor, is enhancement mode P type field effect transistor, have that low-voltage, energy consumption are low, stable performance a little, its Anodic is the source electrode of only this field effect transistor, if select the capable field effect transistor of N, is drain electrode.Transistor Q3, transistor Q4 are NPN type triode, and its anode refers to collector electrode, if select positive-negative-positive, refer to emitter.
Described single-chip microcomputer is 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, 4th pin ground connection, 7th pin is connected with the input of power supply circuits as V_OUT pin, and the 8th pin is connected with output circuit as C_OUT pin.First pin of STC15L104E chip is connected with positive supply BAT+ by resistance R7, and the second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R8.After electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 five capacitor parallel connections, be connected between positive supply BAT+ and ground; Wherein the resistance value value of resistance R1 and resistance R3 is 15K Ω-30K Ω, the resistance value value of resistance R2 and resistance R4 is 200 Ω-500 Ω, the resistance value value of resistance R5, resistance R6, resistance R7 and resistance R8 is 5K Ω-20K Ω, the capacitance value of electric capacity C1, electric capacity C2 and electric capacity C3 is 0.8 μ F-1.5 μ F, and the capacitance value of electric capacity C4 and electric capacity C5 is 80nF-150nF.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. wireless handheld microphone, comprises the pick-up head, voicefrequency circuit and the microphone circuit that connect successively; Also comprise acceleration sensing circuit, described acceleration sensing circuit comprises acceleration transducer and treatment circuit; Acceleration transducer is connected with microphone circuit by treatment circuit; 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; Described control circuit comprises resistance R3, resistance R4, resistance R5, 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 R6, and the anode of transistor Q3 is connected to the grid of field effect transistor Q2 by resistance R4; The grid of field effect transistor Q2 is connected to positive supply BAT+ by resistance R3, 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 R5; The negative electrode of field effect transistor Q2 is connected with the switch terminals of microphone circuit as low level output end L_OUT, high level output end H_OUT or low level output end L_OUT as the anode of high level output end H_OUT, transistor Q4.
2. wireless handheld microphone according to claim 1, is characterized in that: described acceleration transducer is LIS3DH chip; 4th pin of described LIS3DH chip is held as SCL, and the 6th pin is held as SDA, and the first pin, the 8th pin are all connected with positive supply BAT+ with the 14 pin, the 5th pin, the 7th pin, the tenth pin and the equal ground connection of the 12 pin; SCL end is connected with treatment circuit as signal output part with SDA end.
3. wireless handheld microphone according to claim 2, is characterized in that: described power supply circuits comprise resistance R1, resistance R2, field effect transistor Q1 and electric capacity C6; One end of resistance R2 is connected with the V_OUT pin of single-chip microcomputer as the input of power supply circuits, and the other end of resistance R2 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 R1; The anode of field effect transistor Q1 is also connected with positive supply BAT+; The negative electrode of field effect transistor Q1 is by electric capacity C6 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.
4. wireless handheld microphone according to claim 3, is characterized in that: described single-chip microcomputer is STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and the 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 V_OUT pin.
5. wireless handheld microphone according to claim 1, is characterized in that: described single-chip microcomputer is STC15L104E chip; Second pin of described STC15L104E chip is connected with positive supply BAT+, and the 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 C_OUT pin.
6. the wireless handheld microphone according to claim 4 or 5, is characterized in that: the first pin of STC15L104E chip is connected with positive supply BAT+ by resistance R7, and the second pin of STC15L104E chip is connected with positive supply BAT+ by resistance R8.
7. wireless handheld microphone according to claim 6, is characterized in that: after electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and electric capacity C5 five capacitor parallel connections, be connected between positive supply BAT+ and ground; Wherein the capacitance value of electric capacity C1, electric capacity C2 and electric capacity C3 is 0.8 μ F-1.5 μ F, and the capacitance value of electric capacity C4 and electric capacity C5 is 80nF-150nF.
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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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| Application Number | Priority Date | Filing Date | Title |
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| CN201310275809.0A CN103347240B (en) | 2013-07-02 | 2013-07-02 | Wireless handheld microphone |
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| CN103347240A CN103347240A (en) | 2013-10-09 |
| CN103347240B true 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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Families Citing this family (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 |
| CN107820143B (en) * | 2017-10-19 | 2019-12-24 | 广州艾美网络科技有限公司 | Microphone induction hanging rack and requesting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| 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 |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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