Fluid pressure pulsed rebalanced accelerometer
First Claim
Patent Images
1. An accelerometer comprising:
- a. a casing;
b. a bore formed in said casing;
c. a spherical proof mass of a diameter slightly smaller than said bore placed and free to slide within said bore;
d. a compliant switch disposed within said bore near one end and providing an output signal when contacted by said froof mass;
e. a fluid filling said bore;
f. a positive displacement rotary pump having its inlet and outlet in communication with spread parts of said bore, said pump having a shaft;
g. a restrictive flow passage in fluid communication with said bore and coupling the inlet and outlet of said pump;
h. a stepper motor having a shaft coupled to said pump shaft for driving said pump;
i. means coupling the output of said sensor and said stepper motor.
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Abstract
A force rebalanced accelerometer utilizing a spherical proof mass disposed in a fluid and in which fluid pressure pulses developed by positive displacement pump are used to balance inertial forces.
11 Citations
7 Claims
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1. An accelerometer comprising:
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a. a casing; b. a bore formed in said casing; c. a spherical proof mass of a diameter slightly smaller than said bore placed and free to slide within said bore; d. a compliant switch disposed within said bore near one end and providing an output signal when contacted by said froof mass; e. a fluid filling said bore; f. a positive displacement rotary pump having its inlet and outlet in communication with spread parts of said bore, said pump having a shaft; g. a restrictive flow passage in fluid communication with said bore and coupling the inlet and outlet of said pump; h. a stepper motor having a shaft coupled to said pump shaft for driving said pump; i. means coupling the output of said sensor and said stepper motor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification