【摘要】 本文设计了一个无线传输电路,适用于所有以电压信号为输出信号的传感器,便于实现自动控制。本电路具有电路简单、传输距离长、便于控制等优点。使用的IC有数模转换芯片ADC0809、单片机AT89C51以及无线收发模块HAC-UP96,测量电压的范围是0～5V,分辨率为20mV,工作频率为433MHz,收发电流小于40mA,待机状态电流消耗仅为20μA左右。更多还原

【Abstract】 The paper introduces a circuit that can be applied by all gas sensors whose output is voltage signals. The circuit possesses some advantages such as simple structure, long distant transport and easy-to-control. SCM-AT89C51, ADC0809 and wireless transmitting module HAC-UP96 are used. The voltage range is 0～5V, the resolution sensitivity is 20 mV, the operating frequency is 433 MHz, the transmitting current is less than 40 mV, and the stand by mode current consumption is 20μA.更多还原