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1. (WO1982000886) LIFE USAGE INDICATOR

Pub. No.:    WO/1982/000886    International Application No.:    PCT/AU1981/000125
Publication Date: Mar 18, 1982 International Filing Date: Sep 2, 1981
IPC: G01M 13/02
Applicants: COMMONWEALTH OF AUSTRALIA
KRIESER, Uri, Ray
FRASER, Ken, Francis
Inventors: KRIESER, Uri, Ray
FRASER, Ken, Francis
Title: LIFE USAGE INDICATOR
Abstract:
Apparatus for determining the deterioration of components subject to variable operating conditions particularly helicopter gears subject to variable torque. A monitor (10) provides an analogue signal of the level of operating parameter which is passed through conditioning means (26) including pre-amplifier (29), filter stage (31), multiplexer (38) and analogue to digital converter (40). A memory (42) stores deterioration data for the component and a microprocessor (43) repeatedly samples the monitored level of the parameter and determines the deterioration in successive time intervals. Electromechanical counter (53) provides a cumulative output of the deterioration of the components. The microprocessor (43) also analyses the parameter levels into ranges or bands and the total time each component is operating in each range is stored and printed out.