Measuring and testing – Speed – velocity – or acceleration – Centrifugal weight type
Patent
1992-01-28
1994-10-11
Williams, Hezron E.
Measuring and testing
Speed, velocity, or acceleration
Centrifugal weight type
73577R, 73 1D, G01P 316, G01P 1502
Patent
active
053536428
ABSTRACT:
An acceleration measuring system wherein acceleration transducers are mounted on a turntable supported by an air bearing and directly driven by a brushless motor. The output signals generated by the acceleration transducers are amplified by amplifiers mounted on the turntable and the output signals are converted to digital signals by an analog-to-digital converter also mounted on the turntable. The digital signals are modulated into AC signals by a modulator also mounted on the table and then transmitted to a demodulator on a fixed portion of the system through a rotary transformer. The output of the demodulator representing the acceleration signal is applied to digital-to-analog converters and also to a binary coded decimal converter. In an alternative embodiment, the acceleration transducers are mounted on individual separate turntables which in turn are mounted on a primary turntable. The individual turntables are each separately and individually driven by brushless motors and the primary turntable is also directly driven by a brushless motor.
REFERENCES:
patent: 2788654 (1957-04-01), Wiancko
patent: 3267768 (1966-08-01), Drone et al.
patent: 3372572 (1968-03-01), Campbell
patent: 4188816 (1980-02-01), Mairson
patent: 4202205 (1980-05-01), Carpenter
patent: 4848158 (1989-07-01), Egli
Andoh Hisashi
Hasegawa Osamu
Miura Youji
Satoh Kohichi
Shirota Keinosuke
Kwok Helen C.
Kyowa Electronic Instruments, Ltd.
Williams Hezron E.
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