Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Patent
1997-05-19
1998-09-15
Biegel, Ronald L.
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
324658, G01P 1500
Patent
active
058081984
ABSTRACT:
An RF balanced capacitive vibration sensor system includes a carrier generator for generating an r.f. carrier and an inverted r.f. carrier; a voltage tunable capacitive vibration sensor responsive to one of the carriers; a reference capacitor responsive to the other of the carriers; a summing device for combining the outputs from the sensor and reference capacitors; a controller device for adjusting the amplitude of the carriers to tune the capacitance of the sensor to that of the reference capacitor; the sensor modulating one of the carriers with a vibration modulation signal representative of a sensed vibration; an r.f. amplifier device responsive to the summing device for amplifying the modulated carrier from the sensor; and a detector device, responsive to the modulated carrier from the r.f. amplifier, for detecting the modulation signal representative of the sensed vibration.
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Kelley William P.
Ward Paul A.
Amrozowicz Paul D.
Biegel Ronald L.
The Charles Stark Draper Laboratory Inc.
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