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一、电路工作原理流水线红外检测产量计数器电路原理图如附图所示。图中二输入四与非门IC_1中两个与门门1与门2组成环形振荡器,产生频率为30～50 kHz、占空比为1:1的方波。调节电位器RP可调节振荡频率在38kHz,再经与非门3、4整形后,加到三极管V_4的基极。V_4和红外线发射二极管V_2等组成调制发送电路。这样,当接通电源后,红外发射二极管V_2就发出38kHz的方波信号。红外线接收电路由红外接收二极管V_3、红外前置放大器IC_2和施密特触发器IC_3组成。三极管V_5和
First, the circuit works Pipeline infrared detection output counter circuit diagram as shown in the figure. In the figure, the two input NAND gates IC_1 and two AND gates 1 and 2 form a ring oscillator, which generates a square wave with a frequency of 30-50 kHz and a duty ratio of 1: 1. Adjustable potentiometer RP adjustable oscillation frequency at 38kHz, and then by NAND gate 3,4 shaped, added to the base of the transistor V_4. V_4 and infrared emitting diode V_2 modulation transmission circuit. In this way, when the power is turned on, the infrared emitting diode V_2 emits a square wave signal of 38 kHz. Infrared receiver circuit consists of infrared receiver diode V_3, infrared preamplifier IC_2 and Schmitt trigger IC_3. Transistor V_5 and