摘要
文中采用运算法测量方法,包括激励源、滤波电路、C8051F007单片机信号处理部分,输出为4～20mA电流信号,适合远距离传输。实验结果表明,系统综合测量精度为0.5%,并证明了利用电容式原理设计一款高精度的液位传感器是切实可行的。
Based on operation method, the system consists of excitation source, filter circuit, and signal process system with MCU C8051F007. It is fit for long-distance transmission with a 4-20 mA output. The experimental results show that the standard error is 0. 5%, the feasibility of the new fuel level measurement sensor with high accuracy based on the principle of capacitance.
出处
《电子测量技术》
2008年第3期122-124,共3页
Electronic Measurement Technology
关键词
电容传感器
液位测量
运算法
capacitive sensor
liquid level measurement
operation method
