R. R. Newman, R. C. Leedham, J. Tabacchi, D. Purta, G.G. Maderer, R. Galli
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Advances in communication electronics and battery technologies as well as innovative packaging ideas have lead to the development of a thermal sensor bolt which provides for real-time, continuous monitoring of bearing temperatures. The thermal sensor replaces a standard bearing end cap bolt at each end of an axle. The thermal sensor and transmitter contained in the body of the bolt. When activated, transmit a distress signal directly to the engineer in the locomotive. The system consists of a battery as a power source, a thermomechanical sensor and actuator, a transmitter, and a receiver. Tests in railroad service continue at Burlington Northern Railroad as the SMART-BOLT production models are manufactured. Commercialization of the technology is currently under development for application of the SMART-BOLT throughout the industry.<>