汽车用电容式液位计的设计

2015 International Conference on Estimation, Detection and Information Fusion (ICEDIF) Pub Date : 2015-10-01 DOI:10.1109/ICEDIF.2015.7280196

Qingliang Zhang

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引用次数: 4

摘要

对液位的测量方法进行了总结。研制了一种由两根管组成的圆柱形管电容式液体计。推导了液面与电容之间的算术关系。AD7746用于将电容信号转换为电压信号。电压信号经PIC16F877单片机处理后，由1602电路数字显示。指出传感器误差存在于制造、结构和液体温度变化等方面。并提出了相应的解决方案。对仪器进行了标定，比较了标准电容值和计算电容值，并给出了测试结果。

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Design of a capacitive liquidometer applied in automobile

The measurement methods of liquid level are summarized. A cylindrical tube capacitive liquidometer consisting of two tubes is produced. Arithmetic relationship between the liquid level and the capacitance is derived. AD7746 is used to convert the capacitance signal into voltage signal. The voltage signal is then processed by PIC16F877 microcontroller and digitally displayed by the circuit of 1602. It is stated that sensor errors lie in manufacture, structure, and liquid temperature changes. The corresponding solutions are put forward. The calibration is carried out on the instrument to compare the values of the standard capacitance and calculated capacitance and test results are given.

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2015 International Conference on Estimation, Detection and Information Fusion (ICEDIF)

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