Remote self-powered structure monitor

Details Remote self-powered structure monitor Remote self-powered structure monitor

1999-02-02

2000-01-18

Moller, Richard A.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

G01H 100

Patent

active

060148969

ABSTRACT:
An acoustic rotor monitor that is an autonomous self-powered measurement instrument which can detect embedded and hidden fatigue cracks in remotely inaccessible devices such as helicopter rotor system components. A predictive maintenance-related problem for rotor craft is the detection of fatigue cracks as a continuous real-time monitoring process under dynamic rotor system loading conditions. The rotor monitor focuses on the embedding an acoustic emission-based smart sensor directly into the rotor system to measure the high frequency stress waves indicating that a structural crack has propagated as a "self-powered" measurement without reducing structural integrity.

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