CN202455330U - Stride frequency signal controlled sound-light control switch - Google Patents

Stride frequency signal controlled sound-light control switch Download PDF

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CN202455330U
CN202455330U CN2012200337702U CN201220033770U CN202455330U CN 202455330 U CN202455330 U CN 202455330U CN 2012200337702 U CN2012200337702 U CN 2012200337702U CN 201220033770 U CN201220033770 U CN 201220033770U CN 202455330 U CN202455330 U CN 202455330U
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张淑美
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Abstract

本实用新型公开了一种步频信号控制的声光控开关,包括柱极体话筒、音频信号放大器、方波产生电路、低通滤波电路、整形电路、光敏电阻R9、光信号处理电路、清零电路、计数器和定时器;以低通滤波电路输出电压的大小作为检测音频信号频率大小的依据,所以电路中两个控制点电压的选择对电路能否正常工作是非常关键的,选3.8V电压作为3Hz信号的控制点,1.4V电压作为1Hz信号的控制点,当低通滤波电路元件参数不同时这两个控制点的取值点不一样,实现了以步频信号为检测信号,控制对象针对走路信号,电路采用了放大能力强的电压比较器,提高了电路的灵敏性和抗干扰能力,更好的实现了路灯的控制效果。

Figure 201220033770

The utility model discloses an acousto-optic control switch controlled by a step frequency signal, which comprises a pole body microphone, an audio signal amplifier, a square wave generating circuit, a low-pass filter circuit, a shaping circuit, a photosensitive resistor R9, an optical signal processing circuit, and a clearing circuit. Zero circuit, counter and timer; the output voltage of the low-pass filter circuit is used as the basis for detecting the frequency of the audio signal, so the selection of the voltage of the two control points in the circuit is very critical to the normal operation of the circuit, choose 3.8V The voltage is used as the control point of the 3Hz signal, and the 1.4V voltage is used as the control point of the 1Hz signal. When the parameters of the low-pass filter circuit components are different, the value points of the two control points are different, and the step frequency signal is used as the detection signal to realize the control. Object For the walking signal, the circuit uses a voltage comparator with strong amplification ability, which improves the sensitivity and anti-interference ability of the circuit, and better realizes the control effect of street lights.

Figure 201220033770

Description

Step is the sonic-opticalcon trolled switch of signal controlling frequently
Technical field
The utility model relates to a kind of sonic-opticalcon trolled switch, specifically, relates to a kind of sonic-opticalcon trolled switch with step frequency signal controlling, belongs to electronic technology field.
Background technology
It is dark when running into the sound that Sound and light control switch can be implemented in light, and street lamp is lighted automatically, thereby reach people Lai Dengliang, the people walks the effect that lamp puts out.This switch has not only been practiced thrift electric energy, and has prolonged the useful life of bulb, is widely used in the illumination control of public places such as stair, corridor, toilet and biotope at present.
At present; Traditional Sound and light control switch is realized controlling to detect voice signal intensity; There are two shortcomings in it: the one, and sonic-opticalcon trolled switch comes open circuit with the intensity of voice signal, and in order to improve lower that its sensitivity of antijamming capability all does, general footsteps can not make this switch open; The user often will send a bigger voice signal could start it, so convenient inadequately when using; The 2nd, this switch can not suppress single voice signal, receives interference and the error starting of extraneous strong voice signal easily, the automobile complete bright situation of full building corridor lamp of blowing a whistle occurs downstairs through regular meeting and takes place, and the misoperation rate of switch is high.
The utility model content
The problem that the utility model will solve is to above deficiency, and a kind of sonic-opticalcon trolled switch of signal controlling frequently that goes on foot is provided.Through detecting step that the people walks acoustooptic switch of signal controlling frequently; The step of the 1-3Hz that this sonic-opticalcon trolled switch produces when walking with the people who receives is signal enabling frequently, and is irrelevant with the power of sound, can effectively avoid some The noise; Reliability is high; Other noise signals are invalid to be done to such an extent that sensitivity is higher, and it is easier to start, convenient during use.
For overcoming the above problems; The technical scheme that the utility model adopted is: the step is the sonic-opticalcon trolled switch of signal controlling frequently, and it is characterized in that: said sonic-opticalcon trolled switch comprises post pole body microphone, amplifier circuit for sound frequency signal, square wave generation circuit, low-pass filter circuit, shaping circuit, photo resistance R9, optical signal processing circuit, clear circuit, counter and timer;
Post pole body microphone is used for receiving sound signal, and sound signal is exported;
Amplifier circuit for sound frequency signal is connected with post pole body microphone, receives the sound signal and the processing and amplifying of post pole body microphone output;
Square wave generation circuit is connected with amplifier circuit for sound frequency signal, and it is the square-wave pulse signal output of 0.06S that the signal transition of amplifier circuit for sound frequency signal output is become width;
Low-pass filter circuit is connected with square wave generation circuit, is used for the high fdrequency component of filtering audio signal, and the output reflection step is the low frequency signal of speed frequently;
Shaping circuit and clear circuit are connected with the output of low-pass filter circuit respectively, distinguish respectively according to the size of low-pass filter circuit output voltage to be higher than 3Hz signal and the step frequency signal that is lower than 1Hz;
Optical signal processing circuit, input is connected with photo resistance R9, and output is connected with the clear terminal of counter;
Counter is connected with the output of shaping circuit and clear circuit, and the pulse that receives shaping circuit output is counted, and the voltage that receives clear circuit output carries out zero clearing or work;
Timer is connected with thyristor SCR with counter, and the control voltage of count pick up device output drives thyristor SCR conducting.
Further improvement as technique scheme:
Said low-pass filter circuit is made up of diode D1, resistance R 1, resistance R 2, capacitor C 1 and capacitor C 2; The positive pole of diode D1 connects the output of square wave generation circuit; The negative pole of diode D1 is through an end of resistance R 1 connecting resistance R2, capacitor C 1 and capacitor C 2, the other end ground connection of resistance R 2, capacitor C 1 and capacitor C 2.
Said shaping circuit is made up of the second voltage comparator U1B, resistance R 3, resistance R 4 and resistance R 5; The end of oppisite phase of the second voltage comparator U1B connects the output of low-pass filter circuit through resistance R 3, and the positive terminal of the second voltage comparator U1B connects power supply through resistance R 4 ground connection and through resistance R 5.
Said clear circuit is made up of tertiary voltage comparator U1C, resistance R 6, resistance R 7 and resistance R 8, and the end of oppisite phase of tertiary voltage comparator U1C connects power supply through resistance R 7 ground connection and through resistance R 8, and in-phase end connects the output of low-pass filter circuit through resistance R 6.
Said optical signal processing circuit is made up of photo resistance R9, the 4th voltage comparator U1D, resistance R 10, resistance R 11 and resistance R 12; The inverting input of the 4th voltage comparator U1D connects an end of photo resistance R9, resistance R 10; The other end ground connection of resistance R 10; Another termination power of photo resistance R9, the normal phase input end of the 4th voltage comparator U1D connects power supply through resistance R 11 ground connection and through resistance R 12.
The output of the CLK termination shaping circuit of said counter, the CLR zero clearing termination optical signal processing circuit of counter, the output of clear circuit.
The utility model is taked above technical scheme; Compared with prior art, have the following advantages: with the size of low-pass filter circuit output voltage as the foundation that detects the audio signal frequency size, so can the selection of two control point voltages operate as normal be very crucial to circuit in the circuit; Select the control point of 3.8V voltage as the 3Hz signal; 1.4V voltage is as the control point of 1Hz signal, the data point at these two control points is not different simultaneously when the low-pass filter circuit component parameters, has realized that with step frequency signal be detection signal; Controlling object is to the signal of walking; Circuit has adopted the strong voltage comparator of amplifying power, has improved the sensitivity and the antijamming capability of circuit, has better realized the control effect of street lamp.
The utility model is described further with implementing below in conjunction with accompanying drawing.
Description of drawings
Accompanying drawing 1 is the structured flowchart of sonic-opticalcon trolled switch among the utility model embodiment;
Accompanying drawing 2 is the circuit diagram of the utility model embodiment sound intermediate frequency signal amplification circuit and square wave generation circuit;
Accompanying drawing 3 is the circuit diagram of low-pass filter circuit, shaping circuit and clear circuit among the utility model embodiment;
Accompanying drawing 4 is the circuit diagram of optical signal processing circuit, counter and timer among the utility model embodiment;
Accompanying drawing 5 is the circuit diagram of power circuit among the utility model embodiment;
Among the figure,
1-post pole body microphone, 2-amplifier circuit for sound frequency signal, 3-square wave generation circuit, 4-low-pass filter circuit, 5-shaping circuit, 6-optical signal processing circuit, 7-clear circuit, 8-counter, 9-timer.
Embodiment
Embodiment; As shown in Figure 1; Step is the sonic-opticalcon trolled switch of signal controlling frequently, comprises post pole body microphone 1, amplifier circuit for sound frequency signal 2, square wave generation circuit 3, low-pass filter circuit 4, shaping circuit 5, photo resistance R9, optical signal processing circuit 6, clear circuit 7, counter 8 and timer 9;
Post pole body microphone 1 is used for receiving sound signal, and sound signal is exported;
Amplifier circuit for sound frequency signal 2 is connected with post pole body microphone 1, receives the sound signal and the processing and amplifying of post pole body microphone 1 output;
Square wave generation circuit 3 is connected with amplifier circuit for sound frequency signal 2, and it is the square-wave pulse signal output of 0.06S that the signal transition of amplifier circuit for sound frequency signal 2 output is become width;
Low-pass filter circuit 4 is connected with square wave generation circuit 3, is used for the high fdrequency component of filtering audio signal, and the output reflection step is the low frequency signal of speed frequently;
Shaping circuit 5 and clear circuit 7, the output with low-pass filter circuit 4 is connected respectively, distinguishes respectively according to the size of low-pass filter circuit 4 output voltages to be higher than 3Hz signal and the step frequency signal that is lower than 1Hz;
Optical signal processing circuit 6, input is connected with photo resistance R9, and output is connected with the clear terminal of counter 8;
Counter 8 is connected with clear circuit 7 with shaping circuit 5, and the pulse that receives shaping circuit 5 outputs is counted, and the voltage that receives clear circuit 7 outputs carries out zero clearing or work;
Timer 9 is connected with thyristor SCR with counter 8, and the control voltage of count pick up device 8 outputs drives thyristor SCR conducting.
Used a four-operational amplifier chip LM324AD in the sonic-opticalcon trolled switch; LM324AD is made up of the first voltage comparator U1A, the second voltage comparator U1B, tertiary voltage comparator U1C and the 4th voltage comparator U1D; The first voltage comparator U1A is used for audio signal and amplifies; The second voltage comparator U1B is used for shaping circuit 5, and tertiary voltage comparator U1C is used for clear circuit 7, the four voltage comparator U1D and is used for optical signal processing circuit 6.
As shown in Figure 2; Amplifier circuit for sound frequency signal 2 is made up of the first voltage comparator U1A, capacitor C 7, resistance R 18, resistance R 19, resistance R 20, resistance R 21; After receiving voice signal, post pole body microphone 1 converts the signal of telecommunication to; Be coupled to the first voltage comparator U1A through capacitor C7, the in-phase end threshold voltage of the first voltage comparator U1A is got 200mV, and the first voltage comparator U1A output when 200mV is following of voice signal amplitude keeps the output of high level no signal; Voice signal when 200mV is above amplifies, and amplifier circuit for sound frequency signal 2 has just masked the noise signal below the 200mV like this.The first voltage comparator U1A has very high multiplication factor, and the audio signal of choosing is exaggerated into square-wave pulse output.Because the step frequency is short signal duration; The step frequency pulse duration of audio amplifier circuit output is far smaller than other signals; Pulse duration like the voice tone signal; In the low-pass filter circuit 4 of back, go on foot the frequency signal and lose easily, produce circuit 3 so added the one-level square-wave signal in the back of amplifier circuit for sound frequency signal 2.
Square wave generation circuit 3 is made up of integrated package U2, resistance R 22, capacitor C 8, capacitor C 9; The model of integrated package U2 is NE555; Resistance R 22, capacitor C 8 are timing element, and the circuit operation retention time is got 0.06S, the pulse that it is 0.06S that a step of every reception frequency signal is just exported a width; The pulse signal width of circuit output does not just receive the power of input audio signal, the influence of width like this, has improved the sensitivity and the antijamming capability of circuit.
As shown in Figure 3; Low-pass filter circuit 4 is made up of diode D1, resistance R 1, resistance R 2, capacitor C 1 and capacitor C 2; The positive pole of diode D1 connects the output of square wave generation circuit 3; The negative pole of diode D1 is through an end of resistance R 1 connecting resistance R2, capacitor C 1 and capacitor C 2, the other end ground connection of resistance R 2, capacitor C 1 and capacitor C 2; Filtering high fdrequency component is wherein chosen the step frequency signal of low frequency behind the signal of its reciever wave generation circuit 3 outputs; Direct voltage when no input signal and frequency input signal are very high about output 4.6V; Low output voltage is more little more for frequency when going on foot the frequency signal; Output voltage is 3.8V when the step, signal frequency was 3Hz frequently; Magnitude of voltage was 4.2V when the step, signal frequency was 4Hz frequently, and its output voltage is 1.4V when two pulse intervals of input surpass 1S, utilizes the detection voltage of this magnitude of voltage as clear circuit 7.
Shaping circuit 5 is made up of the second voltage comparator U1B, resistance R 3, resistance R 4 and resistance R 5; The end of oppisite phase of the second voltage comparator U1B connects the output of low-pass filter circuit 4 through resistance R 3; The positive terminal of the second voltage comparator U1B connects power supply through resistance R 4 ground connection and through resistance R 5; Be a fixed value voltage comparator, the end of oppisite phase threshold setting is 3.8V, and shaping circuit 5 only just overturns when 3Hz is following and exports positive pulse signal at frequency input signal; Signal frequency circuit when 3Hz is above does not overturn does not have pulse signal output, and the pulse signal of shaping circuit 5 outputs is input to the CLK end of counter 8 and counts.
Clear circuit 7 is made up of tertiary voltage comparator U1C, resistance R 6, resistance R 7 and resistance R 8; The end of oppisite phase of tertiary voltage comparator U1C connects power supply through resistance R 7 ground connection and through resistance R 8; The magnitude of voltage of end of oppisite phase is got 1.4V; In-phase end connects the output signal of low-pass filter circuit 4 through resistance R 6, and the output of tertiary voltage comparator U1C connects the CLR end of counter 8 through anti-phase diode D2, tertiary voltage comparator U1C when input voltage is lower than 1.4V output low level to counter 8 zero clearings; Output high level when input voltage is higher than 1.4V, counter 8 work countings.
As shown in Figure 4; Optical signal processing circuit 6 is made up of photo resistance R9, the 4th voltage comparator U1D, resistance R 10, resistance R 11 and resistance R 12; The inverting input of the 4th voltage comparator U1D connects an end of photo resistance R9, resistance R 10, the other end ground connection of resistance R 10, another termination power of photo resistance R9; The normal phase input end of the 4th voltage comparator U1D connects power supply through resistance R 11 ground connection and through resistance R 12, and its output connects the CLR clear terminal of counter 8 through anti-phase diode D3.Photosensitive resistance R 9 is low resistive state when light is strong, and the 4th voltage comparator U1D end of oppisite phase is a high level, and the 4th voltage comparator U1D output low level is to counter 8 zero clearings; Photosensitive resistance R 9 is high-impedance state when light is dark, and the 4th voltage comparator U1D end of oppisite phase is a low level, and the 4th voltage comparator U1D exports high level, counter 8 work countings.
Counter 8 comprises that model is the trigger U3 of 74LS175D, and inner integrated four D flip-flops of trigger U3 are through having connected to form one 3 digit counter 8.The D1 termination power input high level of counter 8; The pulse signal of CLK termination shaping circuit 5 outputs; CLK holds pulse of every reception; Counter 8 adds number one time;
Figure DEST_PATH_GSB00000857318900061
end output low level when three pulses of continuous acceptance; Pulse counter 8 is by zero clearing when accepting the 4th, and
Figure DEST_PATH_GSB00000857318900062
end reverts to high level again.The signal of
Figure DEST_PATH_GSB00000857318900063
end output of counter 8 is input to the TRI control end of timer 9, control timer 9 work.
Timer 9 is made up of integrated package U4, resistance R 13, resistance R 14, capacitor C 3 and capacitor C 4, and the model of integrated package U4 is NE555, and setting the action retention time is 20S.When the TRI end is low level, the OUT end output high level of integrated package U4, circuit upset behind the maintenance 20S, OUT holds and becomes low level again, and the voltage of timer 9 outputs is input to the control utmost point of thyristor SCR, the work of control thyristor SCR.
As shown in Figure 5; Power circuit provides+and 5V is the VCC power supply; Power circuit work divides two states: first state; When not conducting of thyristor SCR, the 220V alternating voltage obtains the 300V direct current after four diode D5-D8 rectification, and the 300V direct voltage obtains the 5V supply power voltage after resistance R 15, R16,6 filtering of dividing potential drop capacitor C; Second kind of state; When thyristor SCR triggering and conducting, thyristor SCR voltage is lower than 2V, and this moment, circuit utilized capacitor C 6 power supplies; In order to prolong capacitor C 6 power-on times; Capacitor C 6 Capacity Selection obtain bigger as far as possible, and bulb forms current supply circuit through four rectifier diode D5-D8 and thyristor SCR during thyristor SCR conducting, and lamp LD is bright; Loop turn-off lamp LD extinguishes when thyristor SCR ends.
Step frequently the sonic-opticalcon trolled switch of signal controlling with the size of low-pass filter circuit 4 output voltages as the foundation that detects the audio signal frequency size; So can the selection of two control point voltages operate as normal be very crucial to circuit in the circuit; Select the control point of 3.8V voltage as the 3Hz signal; 1.4V voltage is as the control point of 1Hz signal, the data point at these two control points is not different simultaneously when low-pass filter circuit 4 component parameters.
This Sound and light control switch has realized that with step frequency signal be detection signal, and controlling object is to the signal of walking, and circuit has adopted the strong voltage comparator of amplifying power, has improved the sensitivity and the antijamming capability of circuit, has better realized the control effect of street lamp.
It below only is a physical circuit of the utility model; The utility model is not limited to above circuit; Those skilled in the art is under the enlightenment of above technical scheme; Can improve or adopt other circuit to realize above circuit; Be that amplifier circuit for sound frequency signal 2, square wave generation circuit 3, low-pass filter circuit 4, shaping circuit 5, photo resistance R9, optical signal processing circuit 6, clear circuit 7, counter 8 and timer 9 also can be used other circuit realizations, as long as can produce identical functions.

Claims (6)

1.步频信号控制的声光控开关,其特征在于:所述声光控开关包括柱极体话筒(1)、音频信号放大电路(2)、方波产生电路(3)、低通滤波电路(4)、整形电路(5)、光敏电阻R9、光信号处理电路(6)、清零电路(7)、计数器(8)和定时器(9); 1. the acousto-optic control switch of step frequency signal control, it is characterized in that: described acousto-optic control switch comprises pole body microphone (1), audio signal amplifying circuit (2), square wave generation circuit (3), low-pass filter Circuit (4), shaping circuit (5), photoresistor R9, optical signal processing circuit (6), clearing circuit (7), counter (8) and timer (9); 柱极体话筒(1),用来接收声频信号,将声频信号输出; A pole microphone (1), used for receiving audio signals and outputting audio signals; 音频信号放大电路(2),与柱极体话筒(1)连接,接收柱极体话筒(1)输出的声频信号并放大处理; The audio signal amplification circuit (2) is connected with the pole microphone (1), receives and amplifies the audio signal output by the pole microphone (1); 方波产生电路(3),与音频信号放大电路(2)连接,将音频信号放大电路(2)输出的信号转变成宽度为0.06S的方波脉冲信号输出; The square wave generating circuit (3) is connected with the audio signal amplifying circuit (2), and the signal output by the audio signal amplifying circuit (2) is converted into a square wave pulse signal output with a width of 0.06S; 低通滤波电路(4),与方波产生电路(3)连接,用于滤除音频信号中的高频分量,输出反映步频快慢的低频信号; A low-pass filter circuit (4) is connected with the square wave generating circuit (3), and is used to filter out high-frequency components in the audio signal, and outputs a low-frequency signal reflecting the speed of the step frequency; 整形电路(5)和清零电路(7),分别与低通滤波电路(4)的输出端连接,根据低通滤波电路(4)输出电压的大小分别区分高于3Hz信号和低于1Hz的步频信号; The shaping circuit (5) and the clearing circuit (7) are respectively connected to the output terminals of the low-pass filter circuit (4), and the signals higher than 3 Hz and signals lower than 1 Hz are respectively distinguished according to the output voltage of the low-pass filter circuit (4). Cadence signal; 光信号处理电路(6),输入端与光敏电阻R9连接,输出端与计数器(8)的清零端连接; The optical signal processing circuit (6), the input end is connected with the photoresistor R9, and the output end is connected with the clearing end of the counter (8); 计数器(8),与整形电路(5)和清零电路(7)的输出端连接,接收整形电路(5)输出的脉冲进行计数,接收清零电路(7)输出的电压进行清零或工作; The counter (8) is connected to the output terminals of the shaping circuit (5) and the clearing circuit (7), receives the pulses output by the shaping circuit (5) for counting, and receives the voltage output by the clearing circuit (7) for clearing or working ; 定时器(9),与计数器(8)和晶闸管SCR连接,接收计数器(8)输出的控制电压,驱动晶闸管SCR导通。 The timer (9) is connected with the counter (8) and the thyristor SCR, receives the control voltage output by the counter (8), and drives the thyristor SCR to conduct. 2.如权利要求1所述的步频信号控制的声光控开关,其特征在于:所述低通滤波电路(4)由二极管D1、电阻R1、电阻R2、电容C1和电容C2组成,二极管D1的正极接方波产生电路(3)的输出端,二极管D1的负极经电阻R1接电阻R2、电容C1和电容C2的一端,电阻R2、电容C1和电容C2的另一端接地。 2. the acousto-optic control switch of step frequency signal control as claimed in claim 1 is characterized in that: described low-pass filtering circuit (4) is made up of diode D1, resistance R1, resistance R2, electric capacity C1 and electric capacity C2, and diode The anode of D1 is connected to the output end of the square wave generating circuit (3), the cathode of diode D1 is connected to one end of resistor R2, capacitor C1 and capacitor C2 through resistor R1, and the other end of resistor R2, capacitor C1 and capacitor C2 is grounded. 3.如权利要求2所述的步频信号控制的声光控开关,其特征在于:所述整形电路(5)由第二电压比较器U1B、电阻R3、电阻R4和电阻R5组成,第二电压比较器U1B的反相端经电阻R3接低通滤波电路(4)的输出端,第二电压比 较器U1B的正相端经电阻R4接地并经电阻R5接电源。 3. the acousto-optic control switch of step frequency signal control as claimed in claim 2 is characterized in that: described shaping circuit (5) is made up of second voltage comparator U1B, resistance R3, resistance R4 and resistance R5, the second The inverting terminal of the voltage comparator U1B is connected to the output terminal of the low-pass filter circuit (4) through the resistor R3, and the non-phase terminal of the second voltage comparator U1B is grounded through the resistor R4 and connected to the power supply through the resistor R5. 4.如权利要求2或3所述的步频信号控制的声光控开关,其特征在于:所述清零电路(7)由第三电压比较器U1C、电阻R6、电阻R7和电阻R8组成,第三电压比较器U1C的反相端经电阻R7接地并经电阻R8接电源,同相端经电阻R6接低通滤波电路(4)的输出端。 4. The acousto-optic control switch controlled by step frequency signal as claimed in claim 2 or 3, is characterized in that: described clearing circuit (7) is made up of the 3rd voltage comparator U1C, resistance R6, resistance R7 and resistance R8 , the inverting terminal of the third voltage comparator U1C is grounded through the resistor R7 and connected to the power supply through the resistor R8, and the non-inverting terminal is connected to the output terminal of the low-pass filter circuit (4) through the resistor R6. 5.如权利要求4所述的步频信号控制的声光控开关,其特征在于:所述光信号处理电路(6)由光敏电阻R9、第四电压比较器U1D、电阻R10、电阻R11和电阻R12组成,第四电压比较器U1D的反相输入端接光敏电阻R9、电阻R10的一端,电阻R10的另一端接地,光敏电阻R9的另一端接电源,第四电压比较器U1D的正相输入端经电阻R11接地并经电阻R12接电源。 5. the acousto-optic control switch of step frequency signal control as claimed in claim 4 is characterized in that: described optical signal processing circuit (6) is composed of photoresistor R9, the 4th voltage comparator U1D, resistance R10, resistance R11 and Composed of resistor R12, the inverting input terminal of the fourth voltage comparator U1D is connected to photoresistor R9 and one end of resistor R10, the other end of resistor R10 is grounded, the other end of photoresistor R9 is connected to power supply, and the positive phase of the fourth voltage comparator U1D The input terminal is grounded through resistor R11 and connected to power supply through resistor R12. 6.如权利要求5所述的步频信号控制的声光控开关,其特征在于:所述计数器(8)的CLK端接整形电路(5)的输出端,计数器(8)的CLR清零端接光信号处理电路(6)、清零电路(7)的输出端。  6. the acousto-optic control switch of step frequency signal control as claimed in claim 5 is characterized in that: the CLK termination of described counter (8) is connected the output end of shaping circuit (5), and the CLR of counter (8) is cleared The terminal is connected with the output end of the optical signal processing circuit (6) and the clearing circuit (7). the
CN2012200337702U 2012-01-01 2012-01-01 Stride frequency signal controlled sound-light control switch Expired - Fee Related CN202455330U (en)

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