Contactless Monitoring of Ball Bearing Temperature

This article reports a novel technique to directly monitor the temperature of bearing cages. The circuit, developed to sense the bearing cageAs temperature, employs no batteries and transmits data wirelessly. It offers a contact-less method consistent with long-term and low-maintenance operation. To our knowledge, this is the first such technique reported in the literature. In this article, after briefly describing the problem, the proposed technique is overviewed and results from laboratory tests are presented.