Real-Time System for Liquid Level Measurement

Abstract:

A small level measurement system is designed by installing a compact capacitive level sensor in the small container. By analyzing the capacitive sensor structure, a sensor measurement circuit is designed with high sensitivity, measuring stability and good repeatability. Capacitance measurement circuit makes use of multiple harmonic oscillation principle. The microcomputer measures the oscillation frequency of the multivibrator, and calculates the liquid level height based on the monotonic function about the liquid level height and frequency.

• Periodical: Applied Mechanics and Materials (Volume 441)
• Pages: 356-359
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.441.356
• Online since: December 2013
• Authors: Wei Wei, Hai Ying Jiang, Qin Jian Sun, Qiang Huang, Zhi Wei Wang
• Keywords: Calibration Fitting, Capacitive Sensor, Liquid Level Measurement, Multivibrator

References

[1] Yun Wang and Guoxiong Zhang etc.: Electronic Measurement Tech. In Chinese, Vol. 31 (2008), p.122.

[2] Zhizhuang Liu and Tiangsheng Hong etc.: China Instrument In Chinese, No. 8 (2006), p.43.

[3] Xiangling He: Electronic Technology In Chinese, Vol. 46 (2009. 5), p.5.

[4] Bin Fen: Study on a Medium-independent Capacitive Liquid-level Measurement, Thesis for the Degree of Master, Chongqing University (2009).