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DERIVING CONTACT STRESS OR CONTACT LOAD USING ULTRASOUND DATA
DERIVING CONTACT STRESS OR CONTACT LOAD USING ULTRASOUND DATA
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机译：使用超声数据导出接触应力或接触载荷
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摘要
An analysis device 110 comprising an input to receive ultrasound data from an interface 127 between two elements 123 and 125 moving relative to each other or tribologically; ultrasound transducer 120 is mounted onto element 123. A processor determines time of flight data from the ultrasound data, the magnitude of the echo may be derived using a Fast Hilbert Transform and the envelope correlated with a reference signal. Contact stress and/or contact load is derived in the first element from time of flight data independent of phase shift. The greatest component of the ultrasound is perpendicular to the interface. In a second invention the stress may be derived from a change in speed of the ultrasound due to the acoustoelastic effect. The analysis device may be incorporated into a system for monitoring bearings, ball races, rolling element races or rolling elements in turbines, wind turbines, railed vehicles, vehicle tracks, metal rolling mills or hydro power generators.
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