CN2854940Y - Voice control flash radio transmission device - Google Patents
Voice control flash radio transmission device Download PDFInfo
- Publication number
- CN2854940Y CN2854940Y CNU200520076074XU CN200520076074U CN2854940Y CN 2854940 Y CN2854940 Y CN 2854940Y CN U200520076074X U CNU200520076074X U CN U200520076074XU CN 200520076074 U CN200520076074 U CN 200520076074U CN 2854940 Y CN2854940 Y CN 2854940Y
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- light
- microphone
- electric capacity
- transmitting device
- resistance
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Abstract
The utility model relates to a wireless audio transmission apparatus with sound controlled flasher, which can be installed at any place needed wireless audio transmission and is capable of automatically monitoring and controlling the performance of the wireless audio transmission apparatus only by turning on power switch. The utility model functions in inputting audio signals via speaker, receiving clear audio signals via FM receiver, and emitting audio signals from external equipments such as walkman via external signal socket. It also functions in detecting whether the speaker normally inputs audio signals via sound controlled flasher, if the signals are normally inputted, then the light emitting diode (LED) discontinuously flashes to indicate that there are audio signals. The utility model can effectively monitor and control the performance of wireless audio transmission apparatus. The utility model can be designed in the form of DC supply, and it is electricity-saving, safe, convenient, and practical.
Description
One, technical field
The utility model relates to a kind of acoustic control flash of light radio transmitting device, relates in particular to a kind of acoustic control flash of light radio transmitting device that can glisten display radio transmission directly perceived with sound control.
Two, background technology
At present, radio transmitting device does not all have directly perceived the demonstration, therefore, when breaking down, does not know toward contact, after the need recipient of etc.ing finds no signal, makes a phone call or informs that with additive method just discovery has fault, will influence use like this, the delay repairing time.
Three, summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of and can come the acoustic control flash of light radio transmitting device of display radio transmission directly perceived with sound control flash of light.
The purpose of this utility model is to realize like this, a kind of acoustic control flash of light radio transmitting device, comprise DC power supply DC, mains switch K1, microphone MIC, microphone switch K2, external audio frequency signal plug CK, it is characterized in that, be connected in parallel by resistance R 1 with audio signal socket CK by capacitor C 2 and resistance R 2 at described microphone MIC, be connected with D2 with the diode D1 of two reverse parallel connections again, and be connected with the base stage of high-frequency triode V1 by capacitor C 1, the collector electrode of high-frequency triode V1 and capacitor C 4, C5, C7 is connected with coil L, capacitor C 4 and coil L are connected in parallel, be connected with mains switch K1 again, the emitter of high-frequency triode V1 and capacitor C 5, C6 is connected with resistance R 5, resistance R 5 and capacitor C 6 are connected in parallel, and the negative pole with power supply DC is connected again, and capacitor C 7 is connected with antenna S.
The acoustic control flash of light radio transmitting device that provides according to the utility model, the positive pole that it is characterized in that described light-emitting diode D3 is connected with mains switch K1, mains switch K1 is connected with positive source, and the negative pole of light-emitting diode D3 is connected with the negative pole of power supply DC by resistance R 6.Microphone MIC adopts the little microphone of electret, and its positive pole is connected with microphone switch K2 by resistance R 3, and microphone switch K2 is connected with mains switch K1.Be connected with the negative pole of power supply DC after capacitor C 8 and the C9 parallel connection, the other end is connected with mains switch K1.DC power supply DC can be with power supplies such as various A-batteries or rechargeable batteries.Light-emitting diode D3 can use the versicolor light-emitting diode of LED.
Four, description of drawings
Below in conjunction with drawings and Examples, further specify the structure and the characteristics of the utility model acoustic control flash of light radio transmitting device, in the accompanying drawing:
Fig. 1 is the radio transmitting device circuit diagram of embodiment one of the present utility model.
Fig. 2 is the acoustic control flasher circuit figure of embodiment one of the present utility model.
As shown in Figure 1, in embodiment one of the present utility model, high-frequency triode V1 and capacitor C 3, C5, C6 form the oscillator of a capacitance three-point type.The load C 4 of triode V1 collector electrode, L form a resonator, resonance frequency is exactly the resonance frequency of frequency modulation microphone, can be according to the parameter tranmitting frequency among Fig. 1 88 to 108KHZ, just in time cover the receive frequency of FM receiver, can change tranmitting frequency easily by numerical value stretching or the collapse coil L that adjusts L, avoid FM radio station.Transmit to be coupled on the antenna S and launch again by C4.R4 is the base biasing resistor of V1, provides certain base current to triode, makes V1 be operated in the amplification region, and R5 is a DC feedback resistance, plays the effect of stablizing the triode working point.The frequency modulation principle is to realize frequency modulation by the electric capacity that changes between transistor base and the emitter, when sound is added on the base stage of triode, the base stage of triode and the electric capacity voice signal between the emitter can take place with the size of voice signal to change synchronously, the tranmitting frequency of triode is changed, realize frequency modulation(FM).
Microphone is used for collected sound signal, adopts the little microphone of electret here, and is highly sensitive, can gather small-signal, and this microphone work simultaneously is that Dc bias must be arranged, and resistance R 3 can provide certain Dc bias.The hum tone signal that microphone collects by C2 be coupled to R2 coupling after deliver to the base stage of triode, the effect of double limiting is mainly played in two diode reverse parallel connections of D1 and D2 in the circuit.The conducting voltage of diode has only 0.7V, will be shunted by diode current flow if the voltage of voice signal surpasses 0.7V, so just can guarantee that the amplitude of voice signal is limited between the positive and negative 0.7V, and strong excessively voice signal meeting triode ovennodulation produces distortion.
CK is the external signal input socket, external voice signal sources such as walkman can be introduced frequency modulated transmitter, modulates by the base stage of delivering to triode behind R1 decay and D1, the D2 amplitude limit.
Light-emitting diode D3 is used to refer to operating state in the circuit, will light when the frequency modulation microphone is worked, and R6 is the current-limiting resistance of diode.C8, C9 are power filtering capacitors, because big electric capacity generally adopts winding process to make, so equivalent inductance is also bigger, shunt capacitance C8 can make the high frequency internal resistance of power supply reduce.
As shown in Figure 2, in embodiment one of the present utility model, the acoustic control flasher is made up of triode Q1, Q2, Q3 and indicator light MB, and time constant is made up of capacitor C 2 and resistance R 7, after audio signal was imported by A, B two ends, indicator light MB promptly can flash according to the power of audio signal.
Five, embodiment
Implement acoustic control flash of light radio transmitting device of the present utility model, can be installed in the various places that need the voice wireless transmission, turn on the power switch, just can monitor the working condition of radio transmitting device automatically.Function of the present utility model is, can use the microphone input speech signal, receives voice signal clearly by FM receiver, simultaneously can also be by external voice signal sources such as external signal socket emission walkmans.Can also detect whether normal input speech signal of microphone with the acoustic control flasher, if signal normally imports, then light-emitting diode is being interrupted and is glistening, and expression has voice signal.
Implement the work of the utility model energy effective monitoring radio transmitting device, effect is fine.The utility model is designed to direct current supply, and electricity consumption economizes very much, and very safe, also easily, very practical.
Claims (6)
1, a kind of acoustic control flash of light radio transmitting device, comprise DC power supply (DC), mains switch (K1), microphone (MIC), microphone switch (K2), external audio frequency signal plug (CK), it is characterized in that, be connected in parallel by resistance (R1) with audio signal socket (CK) by electric capacity (C2) and resistance (R2) at described microphone (MIC), be connected with (D2) with the diode (D1) of two reverse parallel connections again, and be connected with the base stage of high-frequency triode (V1) by electric capacity (C1), the collector electrode of high-frequency triode (V1) and electric capacity (C4), (C5), (C7) be connected with coil (L), electric capacity (C4) and coil (L) are connected in parallel, be connected with mains switch (K1) again, the emitter of high-frequency triode (V1) and electric capacity (C5), (C6) be connected with resistance (R5), resistance (R5) and electric capacity (C6) are connected in parallel, negative pole with power supply (DC) is connected again, and electric capacity (C7) is connected with antenna (S).
2, acoustic control flash of light radio transmitting device according to claim 1, the positive pole that it is characterized in that described light-emitting diode (D3) is connected with mains switch (K1), mains switch (K1) is connected with positive source, and the negative pole of light-emitting diode (D3) is connected with the negative pole of power supply (DC) by resistance (R6).
3, acoustic control flash of light radio transmitting device according to claim 1 is characterized in that described microphone (MIC) adopts the little microphone of electret, and its positive pole is connected with microphone switch (K2) by resistance (R3), and microphone switch (K2) is connected with mains switch (K1).
4, acoustic control flash of light radio transmitting device according to claim 1 is characterized in that described electric capacity (C8) and (C9) back in parallel is connected with the negative pole of power supply (DC), and the other end is connected with mains switch (K1).
5, acoustic control according to claim 1 flash of light radio transmitting device is characterized in that described DC power supply (DC) can be with power supplies such as various A-batteries or rechargeable batteries.
6, acoustic control according to claim 1 flash of light radio transmitting device is characterized in that described light-emitting diode (D3) can use the versicolor light-emitting diode of LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520076074XU CN2854940Y (en) | 2005-09-30 | 2005-09-30 | Voice control flash radio transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520076074XU CN2854940Y (en) | 2005-09-30 | 2005-09-30 | Voice control flash radio transmission device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2854940Y true CN2854940Y (en) | 2007-01-03 |
Family
ID=37581577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520076074XU Expired - Fee Related CN2854940Y (en) | 2005-09-30 | 2005-09-30 | Voice control flash radio transmission device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2854940Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103508322A (en) * | 2012-06-21 | 2014-01-15 | 宝山钢铁股份有限公司 | Safety prompt voice comprehensive device for bridge type port machine |
| CN103731528A (en) * | 2012-10-15 | 2014-04-16 | 四川九鼎数码科技有限公司 | Wireless frequency-modulation phone microphone |
| CN107507398A (en) * | 2017-07-02 | 2017-12-22 | 昆山市克洛弗智能科技有限公司 | A kind of shelf-life expired display device |
-
2005
- 2005-09-30 CN CNU200520076074XU patent/CN2854940Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103508322A (en) * | 2012-06-21 | 2014-01-15 | 宝山钢铁股份有限公司 | Safety prompt voice comprehensive device for bridge type port machine |
| CN103508322B (en) * | 2012-06-21 | 2015-04-01 | 宝山钢铁股份有限公司 | Safety prompt voice comprehensive device for bridge type port machine |
| CN103731528A (en) * | 2012-10-15 | 2014-04-16 | 四川九鼎数码科技有限公司 | Wireless frequency-modulation phone microphone |
| CN107507398A (en) * | 2017-07-02 | 2017-12-22 | 昆山市克洛弗智能科技有限公司 | A kind of shelf-life expired display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |