Measuring and testing – Instrument proving or calibrating – Speed – velocity – or acceleration
Patent
1997-09-15
1999-10-26
Raevis, Robert
Measuring and testing
Instrument proving or calibrating
Speed, velocity, or acceleration
G01P 2100
Patent
active
059707798
ABSTRACT:
An accelerometer calibration system calibrates an accelerometer for use in, for example, an ocean wave environment in which the accelerometer will ergo generally oscillatory acceleration. The accelerometer calibration system includes an simple harmonic motion ("SHM")-derived accelerator and a processor. The SHM-derived accelerator applies an SHM acceleration to the accelerometer. The accelerometer generates an output signal having an amplitude related to the acceleration applied thereto. The processor controls the SHM-derived accelerator to apply selected accelerations to the accelerometer, receives the output signal from the accelerometer and generates a profile relating the accelerations applied by the sinusoidal acceleration means to the amplitude of the output signal. The SHM-derived accelerator applies the SHM acceleration by rotating the accelerometer around a center of rotation, so that the acceleration applied to the accelerometer is a function of the distance of the accelerometer from the center of rotation and the period of rotation. This enables the acceleration to be determined without any need for a reference or control instrument.
REFERENCES:
patent: 2770126 (1956-11-01), Brown
patent: 3429175 (1969-02-01), Real, Jr. et al.
patent: 5203199 (1993-04-01), Henderson et al.
patent: 5644067 (1997-07-01), Gabrielson
Hebda Peter R.
Middleton Foster H.
Shonting David H.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F
Raevis Robert
The United States of America as represented by the Secretary of
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