CN103093603A - Wireless remote control transmitter with function of receiving feedback information - Google Patents
Wireless remote control transmitter with function of receiving feedback information Download PDFInfo
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- CN103093603A CN103093603A CN2013100486903A CN201310048690A CN103093603A CN 103093603 A CN103093603 A CN 103093603A CN 2013100486903 A CN2013100486903 A CN 2013100486903A CN 201310048690 A CN201310048690 A CN 201310048690A CN 103093603 A CN103093603 A CN 103093603A
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Abstract
The invention discloses a wireless remote control transmitter with a function of receiving feedback information and relates to an electronic remote control transmitter. The wireless remote control transmitter mainly comprises a shell, a press button switch, an electronic element and a circuit board, wherein pins of the electronic element and the press button switch are arranged on the circuit board; the circuit board is arranged inside the shell; a press key of the press button switch extends out of the lower middle part of a panel of the shell; an indicating light or a display window is arranged at the upper part of the panel; and a pin of the indicating light or a character display tube pin in the display window is connected to the circuit board. A turn-on or turn-off instruction operating circuit which consists of the press button switch, a bypass resistor and a not-gate b form is used for transmitting a remote control signal to a receiver through a transmitting coil and a transmitting antenna; and an electromagnetic wave feedback signal with another frequency is transmitted to the remote control transmitter simultaneously when the receiver executes turn-on or turn-off operation, so that the success of remote control can be confirmed by the remote control transmitter. The wireless remote control transmitter is suitable for use in industrial production, engineering construction, hazardous operation and daily life and can further facilitate the work and the life of people.
Description
Technical field
The present invention relates to electronic apparatus, specially refer to a kind of electronic telecontrol transmitter.
Background technology
Current, the electronic telecontrol transmitter is used widely on household electrical appliance and commercial production, greatly facilitates people's work and life.
But present electronic telecontrol transmitter does not have the function of receiving feedback information, far away or in the situation that do not observe when remote control distance, be difficult to be confirmed whether the remote control success, can only confirm by other communication tool, as the other side's unmanned, just be difficult to confirm the remote control situation.
Summary of the invention
The invention provides a kind of wireless remote control emitter with receiving feedback information, be used for the straighforward operation of commercial production, engineering construction, dangerous operation, daily life and entertainment, can determine that when sending instruction the other side whether by the remote control success, further facilitates people's work and life.
A kind of wireless remote control emitter with receiving feedback information of the present invention, mainly formed by housing (3), pushbutton switch (SB), electronic component and circuit board, wherein, the pin of electronic component and pushbutton switch (SB) is arranged on circuit board, circuit board is arranged in housing (3), the button (4) of pushbutton switch (SB) stretches out from panel (5) middle and lower part of housing, pilot lamp (2a) or display window (2b) are set on the top of panel (5), and the character-writing tube pin in the pin of pilot lamp (2a) or display window (2b) is connected on circuit board; Circuit structure on circuit board is: the negative pole of battery (E) is held with being connected to, and the positive pole of battery (E) is connected to a stiff end of variable resistor (RP), and another stiff end of variable resistor (RP) is held with being connected to; The movable end of variable resistor (RP) is connected to the negative electrode of varactor (VD2) and a pin of blocking capacitor (C2), and the anodic bonding of varactor (VD2) is to the ground end; Another pin of blocking capacitor (C2) is connected to an end of receiving antenna (X1), receiving coil (L1), an end and the commutation diode a(VD3 of frequency-selecting capacitor (C3)) anode, the other end of the other end of receiving coil (L1) and frequency-selecting capacitor (C3) is connected to bypass capasitor a(C4) an end, bypass capasitor a(C4) the other end hold with being connected to; Commutation diode a(VD3) negative electrode is connected to commutation diode b(VD4) negative electrode and triode a(VT1) base stage, triode a(VT1) emitter is connected to commutation diode c(VD5) anode, commutation diode c(VD5) negative electrode and commutation diode b(VD4) anodic bonding to ground end; Triode a(VT1) collector is connected to an end of biasing resistor (R2), an end and the not gate a(IC1 of bypass capasitor b (C5)) input end, the other end of biasing resistor (R2) is connected to the positive pole of battery (E), and the other end of bypass capasitor b (C5) is held with being connected to; Not gate a(IC1) output terminal is by current-limiting resistance b(R4) be connected to the anode of light emitting diode (VD7) or the anode of character-writing tube, the negative electrode of light emitting diode (VD7) or the negative electrode of character-writing tube are held with being connected to; The positive pole of battery (E) is connected on the moving contact contact of pushbutton switch (SB) simultaneously, the static contact contact of pushbutton switch (SB) is connected to an end and the not gate b(IC2 that is close to road resistance (R3)) input end, be close to the other end of road resistance (R3) and hold with being connected to; Not gate b(IC2) output terminal is connected to the anode of isolating diode (VD6), the negative electrode of isolating diode (VD6) is connected to an end of oscillating capacitor (C6), an end and the not gate c(IC3 of oscillation resistance (R5)) input end, the other end of oscillating capacitor (C6) is held with being connected to; The other end of output terminal not gate c(IC3) and oscillation resistance (R5) is connected to current-limiting resistance c(R6) an end, current-limiting resistance c(R6) the other end be connected to triode b(VT2) base stage, triode b(VT2) emitter hold with being connected to; Triode b(VT2) collector is connected to an end of emitting antenna (X2) and transmitting coil (L2), and the other end of transmitting coil (L2) is connected to the positive pole of battery (E).During concrete enforcement, not gate a(IC1), not gate b(IC2) and not gate c(IC3) share the cmos digital integrated circuit of a CD40106 hex inverter, the present invention only uses three groups of not gates wherein, the vdd terminal of CD40106 hex inverter is connected to the positive pole of battery (E), the VSS end of CD40106 hex inverter end with being connected to, and the input end of the another three groups of not gates of untapped CD40106 hex inverter is held with being connected to.
In above-mentioned invention, by the luminophor formation pilot lamp (2a) of light emitting diode (VD7); Current limiting resistance a(R1 in circuit structure), voltage stabilizing diode (VD1) and filter capacitor (C1), the positive pole of battery (E) is by current-limiting resistance a(R1) be connected to the positive pole of filter capacitor (C1), the negative electrode of voltage stabilizing diode (VD1) and a stiff end of variable resistor (RP), the anode of the negative pole of filter capacitor (C1), voltage stabilizing diode (VD1) and another stiff end of variable resistor (RP) are held with being connected to.
in circuit structure of the present invention, by pushbutton switch (SB), be close to road resistance (R3) and not gate b(IC2) consist of the command operating circuit of start or shutdown, when pushbutton switch (SB) disconnects, not gate b(IC2) input end is low level, not gate b(IC2) output terminal is high level, not gate b(IC2) high level of output terminal output pins pierce circuit, make the blocking of oscillator, when pushbutton switch (SB) is connected, not gate b(IC2) input end is high level, not gate b(IC2) output terminal is low level, make oscillator release starting of oscillation, isolating diode (VD6) is connected to not gate b(IC2) output terminal and oscillator between, make not gate b(IC2) the output terminal low level can not affect oscillator work, by not gate c(IC3), oscillation resistance (R5) and oscillating capacitor (C6) consist of pierce circuit, as not gate b(IC2) output terminal when being low level and making oscillator release starting of oscillation, not gate c(IC3) input end just is low level, make not gate c(IC3) output terminal be high level, not gate c(IC3) high level of output terminal charges to oscillating capacitor (C6) by oscillation resistance (R5), when the charging voltage of oscillating capacitor (C6) reaches 2/3VDD voltage, not gate c(IC3) output terminal just is low level, oscillating capacitor (C6) just by oscillation resistance (R5) to not gate c(IC3) output terminal discharge, when the voltage on oscillating capacitor (C6) drops to 1/3VDD voltage, not gate c(IC3) output terminal is again high level, not gate c(IC3) high level of output terminal charges to oscillating capacitor (C6) by oscillation resistance (R5) again, so, the charging and discharging that oscillating capacitor (C6) just constantly goes round and begins again by oscillation resistance (R5), make not gate c(IC3) the output terminal high level and the low level that occur going round and beginning again, form oscillator signal, oscillation frequency is determined by the numerical value of oscillation resistance (R5) and oscillating capacitor (C6), f=1/1.4RC, the oscillator signal that oscillator produces is by triode b(VT2) amplify, then launch remote signal by transmitting coil (L2) and emitting antenna (X2) to receiver, when receiver is received remote signal, make inner trigger circuit upset, control bidirectional triode thyristor and be switched on or switched off power supply, realize remote-controlled start-up or shutdown, when receiver was carried out the start operation, receiver sent the electromagnetic wave feedback signal of another frequency to remote control transmitter, in remote control transmitter, by receiving coil (L1), varactor (VD2), blocking capacitor (C2), frequency-selecting capacitor (C3) and bypass capasitor a (C4) consist of resonant circuit, regulate variable resistor (RP), make resonant circuit choose the feedback frequency signal of sending from receiver, through commutation diode a(VD3) and commutation diode b(VD4) carry out the multiplication of voltage lifting after, be input to triode a(VT1) base stage, make triode a(VT1) conducting, thereby make not gate a(IC1) input end be low level, output terminal is high level, the electric current of output terminal not gate a(IC1) is by current-limiting resistance b(R4) and light emitting diode (VD7) or character-writing tube hold to ground, light emitting diode (VD7) or character-writing tube are lighted, confirm the remote-controlled start-up success, when receiver was carried out the remote-control closedown operation, receiver stopped sending electromagnetic wave signal to remote control transmitter, and light emitting diode (VD7) or the character-writing tube of remote control transmitter are extinguished, and confirmed the remote-control closedown success.Use bypass capasitor b (C5) and not gate a(IC1 in circuit), can prevent that light emitting diode (VD7) or character-writing tube from being lighted by noise jamming, affect accuracy, wherein, bypass capasitor b (C5) plays Anti-Jamming, not gate a(IC1) a low level gate action.
The present invention is used for the straighforward operation of commercial production, engineering construction, dangerous operation and daily life, makes the start of household electrical appliance or production equipment or shutdown, and can determine that whether household electrical appliance or production equipment are by the remote control success; Entertainment race to be the first to answer a question activity, use as wireless responder, after the player races to be the first to answer a question successfully, show the character of " congratulating you races to be the first to answer a question successfully " on player's question-and-answer game apparatus, except confirming to race to be the first to answer a question successfully, also play the incentive action to the player.
The invention has the beneficial effects as follows: a kind of wireless remote control emitter with receiving feedback information is provided, come the start of remote control home appliance or production equipment or shutdown, and can determine that whether household electrical appliance or production equipment are by the remote control success, the present invention is adapted at using in commercial production, engineering construction, dangerous operation and daily life, further facilitates people's work and life.
Description of drawings
Fig. 1 is the wireless remote control emitter external view that a kind of hand-held of the present invention has receiving feedback information.
Fig. 2 is a kind of desk-top wireless remote control emitter external view with receiving feedback information of the present invention.
Fig. 3 is the internal circuit diagram with wireless remote control emitter of receiving feedback information of the present invention.
in figure: the 2a. pilot lamp, 2b. display window, 3. housing, 4. button, 5. panel, VD1. voltage stabilizing diode, VD2. varactor, VD3. commutation diode a, VD4. commutation diode b, VD5. commutation diode c, VD6. isolating diode, VD7. light emitting diode, RP. variable resistor, R1. current-limiting resistance a, R2. biasing resistor, R3. be close to road resistance, R4. current-limiting resistance b, R5. oscillation resistance, R6. current-limiting resistance c, C1. filter capacitor, C2. blocking capacitor, C3. frequency-selecting capacitor, C4. bypass capasitor a, C5. bypass capasitor b, C6. oscillating capacitor, VT1. triode a, VT2. triode b, IC1. not gate a, IC2. not gate b, IC3. not gate c, L1. receiving coil, L2. transmitting coil, X1. receiving antenna, X2. emitting antenna, SB. pushbutton switch, E. battery.
Embodiment
in embodiment 1 Fig. 1 and embodiment shown in Figure 3, the wireless remote control emitter with receiving feedback information of hand-held is mainly by housing (3), pushbutton switch (SB), electronic component and circuit board form, wherein, the pin of electronic component and pushbutton switch (SB) is arranged on circuit board, circuit board is arranged in housing (3), the button (4) of pushbutton switch (SB) stretches out from panel (5) middle and lower part of housing, on the top of panel (5), pilot lamp (2a) is set, pilot lamp (2a) is made of the luminophor of light emitting diode (VD7), the pin of pilot lamp (2a) is connected on circuit board, circuit structure on circuit board is: the negative pole of battery (E) is held with being connected to, the positive pole of battery (E) is by current-limiting resistance a(R1) be connected to the positive pole of filter capacitor (C1), the negative electrode of voltage stabilizing diode (VD1) and a stiff end of variable resistor (RP), the anode of the negative pole of filter capacitor (C1), voltage stabilizing diode (VD1) and another stiff end of variable resistor (RP) are held with being connected to, the movable end of variable resistor (RP) is connected to the negative electrode of varactor (VD2) and a pin of blocking capacitor (C2), and the anodic bonding of varactor (VD2) is to the ground end, another pin of blocking capacitor (C2) is connected to an end of receiving antenna (X1), receiving coil (L1), an end and the commutation diode a(VD3 of frequency-selecting capacitor (C3)) anode, the other end of the other end of receiving coil (L1) and frequency-selecting capacitor (C3) is connected to bypass capasitor a(C4) an end, bypass capasitor a(C4) the other end hold with being connected to, commutation diode a(VD3) negative electrode is connected to commutation diode b(VD4) negative electrode and triode a(VT1) base stage, triode a(VT1) emitter is connected to commutation diode c(VD5) anode, commutation diode c(VD5) negative electrode and commutation diode b(VD4) anodic bonding to ground end, triode a(VT1) collector is connected to an end of biasing resistor (R2), an end and the not gate a(IC1 of bypass capasitor b (C5)) input end, the other end of biasing resistor (R2) is connected to the positive pole of battery (E), and the other end of bypass capasitor b (C5) is held with being connected to, not gate a(IC1) output terminal is by current-limiting resistance b(R4) be connected to the anode of light emitting diode (VD7) or the anode of character-writing tube, the negative electrode of light emitting diode (VD7) or the negative electrode of character-writing tube are held with being connected to, the positive pole of battery (E) is connected on the moving contact contact of pushbutton switch (SB) simultaneously, the static contact contact of pushbutton switch (SB) is connected to an end and the not gate b(IC2 that is close to road resistance (R3)) input end, be close to the other end of road resistance (R3) and hold with being connected to, not gate b(IC2) output terminal is connected to the anode of isolating diode (VD6), the negative electrode of isolating diode (VD6) is connected to an end of oscillating capacitor (C6), an end and the not gate c(IC3 of oscillation resistance (R5)) input end, the other end of oscillating capacitor (C6) is held with being connected to, the other end of output terminal not gate c(IC3) and oscillation resistance (R5) is connected to current-limiting resistance c(R6) an end, current-limiting resistance c(R6) the other end be connected to triode b(VT2) base stage, triode b(VT2) emitter hold with being connected to, triode b(VT2) collector is connected to an end of emitting antenna (X2) and transmitting coil (L2), and the other end of transmitting coil (L2) is connected to the positive pole of battery (E).Not gate a(IC1), not gate b(IC2) and not gate c(IC3) share the cmos digital integrated circuit of a CD40106 hex inverter, the present embodiment only uses three groups of not gates wherein, the vdd terminal of CD40106 hex inverter is connected to the positive pole of battery (E), the VSS end of CD40106 hex inverter end with being connected to, and the input end of the another three groups of not gates of untapped CD40106 hex inverter is held with being connected to.When the present embodiment uses, when inoperation pushbutton switch (SB), not gate b(IC2) input end is low level, not gate b(IC2) output terminal output high level pin pierce circuit, make the blocking of oscillator; When clicking button when pushbutton switch (SB) is connected, not gate b(IC2) input end is high level, not gate b(IC2) output terminal is low level, make oscillator release starting of oscillation, the oscillator signal that oscillator produces is by triode b(VT2) amplify, then launch remote signal by transmitting coil (L2) and emitting antenna (X2) to receiver; When receiver is received remote signal, making the trigger circuit upset, carry out start or power-off operation; When receiver was carried out the start operation, receiver sent the electromagnetic wave feedback signal of another frequency to remote control transmitter; Remote control transmitter is chosen the wave frequency signal of sending from receiver, be input to triode a(VT1) base stage, make triode a(VT1) conducting, thereby make not gate a(IC1) input end be low level, output terminal is high level, light emitting diode (VD7) on remote control transmitter is lighted, confirmed the remote-controlled start-up success; When clicking again button when pushbutton switch (SB) is connected, receiver receives that remote signal makes the trigger circuit upset, carries out power-off operation, when receiver is carried out the remote-control closedown operation, receiver stops sending electromagnetic wave signal to remote control transmitter, light emitting diode (VD7) or character-writing tube on remote control transmitter are extinguished, confirm the remote-control closedown success.The present embodiment uses in commercial production, engineering construction, dangerous operation and daily life, by straighforward operation, make the start of household electrical appliance or production equipment or shutdown, light or extinguish to determine that whether household electrical appliance or production equipment are by the remote control success by the pilot lamp of telepilot.In the present embodiment, the frequency of operation of remote control transmitter and receiver is selected between 30-40MHz.
embodiment 2 the present embodiment are the desk-top wireless remote control emitter with receiving feedback information, in Fig. 2 and embodiment shown in Figure 3, mainly by housing (3), pushbutton switch (SB), electronic component and circuit board form, wherein, the pin of electronic component and pushbutton switch (SB) is arranged on circuit board, circuit board is arranged in housing (3), the button (4) of pushbutton switch (SB) stretches out from panel (5) middle and lower part of housing, on the top of panel (5), display window (2b) is set, in display window (2b), character-writing tube is arranged, the pin of character-writing tube is connected on circuit board, circuit structure on circuit board is identical with the first embodiment, repeats no more here.The present embodiment is as the question-and-answer game apparatus utilization in cultural and recreational activity, what show in display window (2b) is the character of " congratulating you races to be the first to answer a question successfully ", after the player races to be the first to answer a question successfully, " congratulating you races to be the first to answer a question successfully " character at player's question-and-answer game apparatus display window (2b) is lighted, except confirming to race to be the first to answer a question successfully, also play the incentive action to the player.
in the above embodiments, the total voltage of battery (E) is 6V, the voltage of voltage regulation of voltage stabilizing diode (VD1) is 4.5V, VD2 selects the varactor of 2CB series, commutation diode a(VD3), commutation diode b(VD4), commutation diode c(VD5) and isolating diode (VD6) select the silicon rectifier diode of 1N4001 model, light emitting diode (VD7) is selected the high brightness LED of 5 millimeters of diameters, variable resistor (RP) is selected the variable resistor of 20K Ω, current-limiting resistance a(R1) select the metalfilmresistor of 10K Ω/0.25W, biasing resistor (R2) is selected the metalfilmresistor of 15K Ω/0.25W, be close to road resistance (R3) and select the carbon resister of 300K Ω/0.25W, current-limiting resistance b(R4) select the carbon resister of 4.7K Ω/0.25W, the metalfilmresistor of 1K Ω/0.25W that oscillation resistance (R5) is selected, current-limiting resistance c(R6) select the carbon resister of 10K Ω/0.25W, filter capacitor (C1) is selected the electrolytic condenser of 47uF/16V, blocking capacitor (C2), bypass capasitor a(C4) and bypass capasitor b(C5) select the ceramic disc capacitor device of 0.01uF/25V, frequency-selecting capacitor (C3) is selected the ceramic disc capacitor device of 20pF/25V, oscillating capacitor (C6) is selected the ceramic disc capacitor device of 20pF/25V, triode a(VT1) and triode b(VT2) select the Technitron of 3DG122, receiving coil (L1) silver jacketed wire of diameter 1.25mm, long for enclosing around 10 on the shortwave bar magnet of 3cm at diameter 10mm, it is that the 10mm number of turns is the air core coils of 6 circles that transmitting coil (L2) is coiled into diameter with the enameled wire of diameter 1mm.
Claims (3)
1. wireless remote control emitter with receiving feedback information, it is characterized in that wireless remote control emitter is mainly by housing (3), pushbutton switch (SB), electronic component and circuit board form, wherein, the pin of electronic component and pushbutton switch (SB) is arranged on circuit board, circuit board is arranged in housing (3), the button (4) of pushbutton switch (SB) stretches out from panel (5) middle and lower part of housing, pilot lamp (2a) or display window (2b) are set on the top of panel (5), character-writing tube pin in the pin of pilot lamp (2a) or display window (2b) is connected on circuit board, circuit structure on circuit board is:
The negative pole of battery (E) is held with being connected to, and the positive pole of battery (E) is connected to a stiff end of variable resistor (RP), and another stiff end of variable resistor (RP) is held with being connected to; The movable end of variable resistor (RP) is connected to the negative electrode of varactor (VD2) and a pin of blocking capacitor (C2), and the anodic bonding of varactor (VD2) is to the ground end; Another pin of blocking capacitor (C2) is connected to an end of receiving antenna (X1), receiving coil (L1), an end and the commutation diode a(VD3 of frequency-selecting capacitor (C3)) anode, the other end of the other end of receiving coil (L1) and frequency-selecting capacitor (C3) is connected to bypass capasitor a(C4) an end, bypass capasitor a(C4) the other end hold with being connected to; Commutation diode a(VD3) negative electrode is connected to commutation diode b(VD4) negative electrode and triode a(VT1) base stage, triode a(VT1) emitter is connected to commutation diode c(VD5) anode, commutation diode c(VD5) negative electrode and commutation diode b(VD4) anodic bonding to ground end; Triode a(VT1) collector is connected to an end of biasing resistor (R2), an end and the not gate a(IC1 of bypass capasitor b (C5)) input end, the other end of biasing resistor (R2) is connected to the positive pole of battery (E), and the other end of bypass capasitor b (C5) is held with being connected to; Not gate a(IC1) output terminal is by current-limiting resistance b(R4) be connected to the anode of light emitting diode (VD7) or the anode of character-writing tube, the negative electrode of light emitting diode (VD7) or the negative electrode of character-writing tube are held with being connected to; The positive pole of battery (E) is connected on the moving contact contact of pushbutton switch (SB) simultaneously, the static contact contact of pushbutton switch (SB) is connected to an end and the not gate b(IC2 that is close to road resistance (R3)) input end, be close to the other end of road resistance (R3) and hold with being connected to; Not gate b(IC2) output terminal is connected to the anode of isolating diode (VD6), the negative electrode of isolating diode (VD6) is connected to an end of oscillating capacitor (C6), an end and the not gate c(IC3 of oscillation resistance (R5)) input end, the other end of oscillating capacitor (C6) is held with being connected to; The other end of output terminal not gate c(IC3) and oscillation resistance (R5) is connected to current-limiting resistance c(R6) an end, current-limiting resistance c(R6) the other end be connected to triode b(VT2) base stage, triode b(VT2) emitter hold with being connected to; Triode b(VT2) collector is connected to an end of emitting antenna (X2) and transmitting coil (L2), and the other end of transmitting coil (L2) is connected to the positive pole of battery (E).
2. a kind of wireless remote control emitter with receiving feedback information according to claim 1, is characterized in that consisting of pilot lamp (2a) by the luminophor of light emitting diode (VD7).
3. a kind of wireless remote control emitter with receiving feedback information according to claim 1, it is characterized in that current limiting resistance a(R1 in circuit structure), voltage stabilizing diode (VD1) and filter capacitor (C1), the positive pole of battery (E) is by current-limiting resistance a(R1) be connected to the positive pole of filter capacitor (C1), the negative electrode of voltage stabilizing diode (VD1) and a stiff end of variable resistor (RP), the anode of the negative pole of filter capacitor (C1), voltage stabilizing diode (VD1) and another stiff end of variable resistor (RP) are held with being connected to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310048690.3A CN103093603B (en) | 2013-02-07 | 2013-02-07 | Wireless remote control transmitter with function of receiving feedback information |
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| CN201310048690.3A CN103093603B (en) | 2013-02-07 | 2013-02-07 | Wireless remote control transmitter with function of receiving feedback information |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106781933A (en) * | 2017-03-28 | 2017-05-31 | 桂林师范高等专科学校 | Teaching question-and-answer game apparatus |
| CN108171958A (en) * | 2017-12-11 | 2018-06-15 | 山东大学 | The time break Interactive control device and method of tunnel geological forecast |
| CN110286618A (en) * | 2019-06-04 | 2019-09-27 | 珠海华裕鑫科技有限公司 | A kind of energy-saving management system and method for intellectual water meter |
| CN113114285A (en) * | 2021-04-13 | 2021-07-13 | 广东奥科伟业科技发展有限公司 | Transmitter for voice frequency selection and frequency leakage prevention and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN103093603B (en) | 2014-06-25 |
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