To obtain bearing fault signals with high signal-to-noise ratio, an appropriate sensor module needs to be designed and implemented that can be placed in the vicinity of the bearing to be monitored. This paper presents several design issues related to the sensor module, the build-in electronics, and the scheme of wireless signal communication. Advantages of using an integrated sensor over an external sensor for acquiring bearing signals are presented. Experimental studies have been conducted under various loading and speed conditions, using a commercially available ball bearing that has a seeded defect on its inner ring. The defect was detected using power spectrum analysis techniques. The results provided useful input to the further development of signal processing algorithms for bearing defect feature extraction.

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