新型高精度水位传感器性能测试系统

摘要

This paper introduces a new-type resonant water-level sensor performance test system. The ultimate aim of this system is to obtain the characteristic curve of tested sensor, and engineer can use the curve to judge whether the performance of the tested sensor has reached the pre-established standard. This system takes the ADuC812 as main controller, and its hardware circuit consists of pressure value of water-level measurement circuit, frequency measurement circuit, switching circuit of gas chamber. The central idea of this system is that it adopts a new-type frequency measurement method and numerical processing method to obtain the characteristic curve of tested sensor, which eliminate the shortcomings of low precision, high error characteristics of traditional sensor tested system ,and greatly improved the system's accuracy and reliability.%设计了一种新型的谐振式水位传感器性能的测试系统,系统的最终目标是测得被测传感器的特性曲线,并以此来判断传感器的性能达标情况.系统以AD μ C812作为主控制器；硬件电路主要包括水位高度压力值测量电路、谐振频率的测量电路及气室进气口开闭的控制电路.系统的核心在于采用了一种新型的频率测量方法及数值处理方法来到得传感器的特性曲线,本系统彻底消除了传统传感器检测仪的低精度、高误差的特点,大大提高了系统测量的可靠性和精准度.