传输距离可变的红外收发装置的研究

Research on the Infrared Receiving and Transmitting Device with Transmission Variable Distance

针对红外发射距离近这一问题进行了研究.首先设计了红外发射电路,并用单片机对信号进行脉冲调制产生瞬间强电流的方法,在不影响红外发光管使用寿命的基础上使红外发射端通信距离尽量远;然后设计了红外接收端电路,通过加入隔直电容和接地电阻来实现对干扰的排除.用不同发射管、发射电路,改变接收电路的阈值和放大倍数达到改变传输距离的效果,简单可靠.

The paper studies the problem of changing the distance of infrared emission. Firstly, it devises the infrared emission circuit, and uses single chip to generate instantaneous strong current with the, with signal pulse , On the basis of not affecting the service life of the infrared light emitting tube, the infrared emitting termi-nal can be communicated as far as possible ; and then it designs the infrared receiver circuit, by adding capaci-tance and grounding resistance to achieve the elimination of interference, using different transmitting tube, trans-mitting circuit, receiving circuit to change the threshold value and the magnification to change the transmission distance effect,which is simple and reliable.