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本文介绍的红外计数装置可用于生产线上的产品计数及统计人数等用途,其工作方式为遮光计数。红外发射电路见图1。将时基电路555接成多谐振荡器形式,可通过调RP使振荡频率为5 kHz。555输出经V驱动红外发光二极管V′发出调制光。接收及计数电路见图2。V_1是一只红外光敏二极管,用作光电转换。由于接入C_2,使IC_1组成一高通滤波器,有效地消除了杂散光的干扰。IC_1的输出信
This article describes the infrared counting device can be used for product line count and statistics of the number of other uses, the way for the shading count. Infrared emission circuit shown in Figure 1. Connect the time base circuit 555 into a multivibrator form, and adjust the RP to make the oscillation frequency 5 kHz. 555 output V-driven infrared light-emitting diode V ’modulated light. Receive and count circuit shown in Figure 2. V_1 is an infrared photodiode used as a photoelectric conversion. Due to the access to C_2, IC_1 forms a high-pass filter, which effectively eliminates the interference of stray light. IC_1 output letter