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一般的红外光电传感器,在有杂散光干扰的情况下不能很好地工作。本文介绍一种采用脉冲调制的红外光电传感器,它能在有强光干扰的环境中可靠地工作。和一般的红外光电传感器相比,它具有不怕光干扰、检测距离远、动态响应好等三个显著的特点。电路由振荡器、脉冲功率放大和光调制、调制光信号接收、信号选通、解调输出五个部分组成,见图1。
General infrared photoelectric sensor, in the presence of stray light interference does not work well. This article describes a pulse-modulated infrared photoelectric sensor that operates reliably in environments with strong light interference. And compared with the general infrared photoelectric sensor, it has not afraid of light interference, detection distance, dynamic response is good, and other three notable features. The circuit consists of oscillator, pulse power amplification and optical modulation, modulation optical signal reception, signal strobe, demodulation output of five parts, shown in Figure 1.