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Instrument for Measuring Squeeze-Bearing Deflection and Flying Height Disclosure Number: IPCOM000063764D
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-18

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Hammer, R Scranton, RA Yarmchuk, EJ [+details]


This structure measures both static flying height and dynamic peak-to- peak deflection of ultrasonic air bearings, pressurized by the squeeze effect. It is also adaptable to externally pressurized bearings. To characterize bearing operation and to monitor bearing parameters, it is necessary to measure the minute motions of this mechanical component in situ . High frequency response allows for measurement of deflection. Previous techniques which might be suitable for flying height measurements are not fast enough for deflection measurements at 30-40 kHz. Wiring and a mechanical mount 14 on the top surface make the task difficult. The measurement does not disturb the system under study. The instrument shown in the drawing consists of a flexible fiber- optic probe 11 having two sets of fiber-optic filaments, jacketed together.