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Self-powered high signal-to-noise ratio acoustic emission sensor and its demonstration on detecting dynamic friction variation

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2 Author(s)
Guo-Hua Feng ; Dept. of Mech. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan ; Min-Yiang Tsai

This paper presents a micromachined self-powered acoustic emission (AE) sensor based on a novel corrugated PVDF sensing core. The developed transducer exhibits superior signal-to-noise ratio (SNR) and is much higher than current commercial AE sensor based on the same steel-ball drop test experiment. The sensor is applied to monitor identical ball-bearings with different levels of wear. Through short-time Fourier transform, frequency-domain spectrum and wavelet analysis, results demonstrate its capability of detecting dynamic friction effectively. This can be very useful in monitoring the health condition of moving components and predicting possible failures in advance.

Published in:

Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International

Date of Conference:

5-9 June 2011