目录
前言................................ ................ ..................................... 1
1 液位测量系统概述........................ ... ............................... 2
传感器与检测技术................................................... 2
液位测量系统的现状............................................... 3
液位传感器的发展方向........................................... 7
2 系统分析和总体设计........................................................... 8
对液位测量系统的要求........................................... 8
系统组成及工作原理............................................... 8
系统组成........................................................... 8
工作原理.................................................. ........ 8
3 系统硬件设计....................................................... ... ........... 10
主机系统....................................................... ........... 10
液位测量系统.......................................................... 12
超声波传感器.................................................. 12
信号调理电路.................................................. 17
温度补偿电路.................................................. 24
键盘........................................................ ... ............. 26
液位显示................................................. ................ 27
通信系统..................................................... ............ 29
报警系统..................................................... ............ 34
电源......................................................... ... ............ 36
4 系统软件设计..................................................... ............... 37
编程思路及流程图.................................................. 37
结论....................... ........................ ....................................... 40
致谢.................................................... ........... ....................... 41
参考文献......................................................... ... ... ... ........... 42
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