Description and Test Methods for a Frequency Output Accelerometer

A. M. Gogic, R. B. Peters

Abstract:	A vibrating beam accelerometer is described as representative of a newly emerging class of frequency output sensors. The output characteristics of these sensors are inherently digital in nature and generally non-linear. Their digital nature requires that interfaces be defined entirely in digital terms, and that these interfaces be carefully thought out so as not to introduce unnecessary problems related to sampling noise, resolution, and aliasing. Non-linearity requires modeling in a microprocessor for most applications and also introduces a potential for input rectificaton if not handled correctly. In addition, the fact that the input is acceleration means that vibration isolators are not generally practical, and rather wide band inputs must be accommodated. Methods are described for measuring the characteristics of these sensors, and for efficient conversion of their outputs to high accuracy digital words, corrected for the effects of non-linearity and temperature.
Published in:	Proceedings of the 1984 National Technical Meeting of The Institute of Navigation January 17 - 19, 1984 San Diego, CA
Pages:	108 - 117
Cite this article:	Gogic, A. M., Peters, R. B., "Description and Test Methods for a Frequency Output Accelerometer," Proceedings of the 1984 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1984, pp. 108-117.
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