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.
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;
end output low level when three pulses of continuous acceptance;
Pulse counter 8 is by zero clearing when accepting the 4th, and
end reverts to high level again.The signal of
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.