Low-Cost Oil Quality Sensor Based on Changes in Complex Permittivity

Sensors

Angel Torres Pérez¹ 

关键词: oil quality;    impedance spectroscopy;    marginal oscillator;    dielectric;    permittivity;    lubrication oil;    on-line monitoring;   

DOI  :  10.3390/s111110675

来源: mdpi

【 摘 要 】

Real time oil quality monitoring techniques help to protect important industry assets, minimize downtime and reduce maintenance costs. The measurement of a lubricant’s complex permittivity is an effective indicator of the oil degradation process and it can be useful in condition based maintenance (CBM) to select the most adequate oil replacement maintenance schedules. A discussion of the working principles of an oil quality sensor based on a marginal oscillator to monitor the losses of the dielectric at high frequencies (>1 MHz) is presented. An electronic design procedure is covered which results in a low cost, effective and ruggedized sensor implementation suitable for use in harsh environments.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.