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对于脉冲信号传输一百米左右距离的情况,首先用传输线理论分析了信号的传输特性,计算了信号传输的延时、衰减和反射;然后采用RS-485串行总线标准及在传输终端接匹配电阻的电路来传输脉冲信号,一方面提高了信号传输速率和传输距离,另一方面消除了信号因反射引起的畸变和失真,增强了信号的传输可靠性;最后通过实验证明了传输电路结构简单,信号传输可靠性高,具有很大的实用和推广价值。
For pulse signal transmission distance of about 100 meters, the transmission characteristics of the first transmission line theory was analyzed, the signal transmission delay, attenuation and reflection was calculated; and then use the RS-485 serial bus standard and the transmission termination to match The resistance of the circuit to transmit pulse signals, on the one hand to improve the signal transmission rate and transmission distance, on the other hand to eliminate the signal distortion caused by reflection and distortion, enhanced signal transmission reliability; Finally, the experiment proved that the transmission circuit is simple , Signal transmission reliability, with great practical and promotional value.