Wireless temperature sensor for bearing health monitoring

Yi Jia; Jhon Henao-Sepulveda; Manuel Toledo-Quinones

doi:10.1117/12.539578

29 July 2004 Wireless temperature sensor for bearing health monitoring

Yi Jia, Jhon Henao-Sepulveda, Manuel Toledo-Quinones

Proceedings Volume 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2004) https://doi.org/10.1117/12.539578
Event: Smart Structures and Materials, 2004, San Diego, CA, United States

Abstract

A remotely-powered wireless temperature sensor to monitor a bearing health has been developed. The device employs a pair of miniaturized temperature sensitive capacitors in a simple inductor-capacitor (L-C) oscillator configuration. The bearing temperature is encoded in the frequency of the oscillator’s signal. The signal is wirelessly monitored by a receiver, which is connected to a PC for further analysis. Energy for the sensor circuit’s operation is supplied by a second electromagnetic radio signal, produced by an exciter coil. Thus, no wires or batteries are attached to the sensor circuit. The devices are fabricated on Dupont Kapton thick film substrates using surface mount components, and can be integrated onto bearing cages during fabrication. The circuits are designed to have small size, low power consumption, wide dynamic range and very low cost. After a brief introduction, this article describes the circuits employed. Calibration results are then presented.

Citation Download Citation

Yi Jia, Jhon Henao-Sepulveda, and Manuel Toledo-Quinones "Wireless temperature sensor for bearing health monitoring", Proc. SPIE 5391, Smart Structures and Materials 2004: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (29 July 2004); https://doi.org/10.1117/12.539578

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