Transducer testing system for low frequency vibrations

Details Transducer testing system for low frequency vibrations Transducer testing system for low frequency vibrations

1993-08-17

1995-07-25

Williams, Hezron E.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73667, 73663, G01M 700, B06B 300

Patent

active

054351685

ABSTRACT:
A transducer testing system for low frequency vibrations incorporates an electric motor/gearbox assembly 16 with an output shaft 18 and mechanical means for converting low frequency shaft rotation of the output shaft 18 to uniform low frequency sinusoidal excitation of an accelerometer 10. Simultaneously, a data processing unit 14 measures the response of the accelerometer 10 to the uniform low frequency excitation within predetermined frequency ranges. The data processing unit 14 then compares the measured response with predetermined accelerometer response limits to ascertain whether the accelerometer 10 is functional. The transducer testing system overcomes the limitations of electrodynamic testers to provide a means for accurately testing the low frequency response of the accelerometer 10.

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Laing, Army Helicopter Vibration Survey Methods and Results, 29th Annual Forum of the American Helicopter Society, Washington, D.C., May, 1973.
Houser et al., Vibration Diagnostics in Helicopter Power Trains, Paper 12 of NATO Advisory Group for Aerospace Research and Development (AGARD) Conference Proceedings No. 165 on Diagnostics and Engine Condition Monitoring, Apr. 1974.

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