P89LPC935在雨量探测中的应用  

Application of P89LPC935 in rainfall detecting

作　　者：杨雷[1] 卢广建[2] 范保松[2] 

机构地区：[1]东莞理工学院电子工程系,广东东莞523106 [2]河南省气象局,河南郑州450003

出　　处：《国外电子元器件》2005年第11期4-7,共4页International Electronic Elements

摘　　要：在超声波探头上施加一电脉冲信号,探头发出超声波,在遇到不同介质界面时被反射,超声波探头接收回波并将之变为电脉冲信号。利用P89LPC935的CCU部件测量发射波和回波之间的时间间隔,通过准确测量环境温度计算出超声波传播速度,进而测量出超声波的传输距离,从而获知液位高度和降雨量。The ultrasonic detector gives off an ultrasonic wave when it is given an electronic pulse. This ultrasonic wave is rejected at the interface of two kinds of media.The ultrasonic detector receives this wave and converts it into electronic pulse.The time between the send pulse and the back pulse can be captured by means of the CCU of the MCU P89LPC935. The velocity can be calculated by temperature measurement.Then the distance can be detected by means of the time and the velocity.The liquid level and rainfall can be detected by this way.

关 键 词：P89LPC935 捕捉 超声波探头 温度 液位 降雨量 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]