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Journal of Sensors
Volume 2016, Article ID 1386564, 7 pages
Research Article

Performance Characteristics and Temperature Compensation Method of Fluid Property Sensor Based on Tuning-Fork Technology

1State Key Laboratory of Robotics and System, HIT, Harbin 150001, China
2School of Mechanical, Electrical & Information Engineering, Shandong University at Weihai, Weihai 264209, China

Received 3 July 2015; Revised 24 September 2015; Accepted 4 October 2015

Academic Editor: Liling Fu

Copyright © 2016 Yuan Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Fluid property sensor (FPS) based on tuning-fork technology is applied to the measurement of the contaminant level of lubricant oil. The measuring principle of FPS sensor is derived and proved together with its resolution. The performance characteristics of the FPS sensor, such as sensitivity coefficient, resolution, and quality factor, are analyzed. A temperature compensation method is proposed to eliminate the temperature-dependence of the measuring parameters, and its validity is investigated by numerical simulation of sensitivity, oscillating frequency, and dielectric constant. The values of purification efficiency obtained using microwave and without microwave are compared experimentally.