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TECHNICAL BRIEFS

A Flueric Accelerometer

[+] Author and Article Information
Edward L. Rakowsky

Kearfott Division, The Singer Co., Little Falls, N. J.

Albertus E. Schmidlin

Concepts Formulation Branch, Picatinny Arsenal, Dover, N. J.

Michael J. Desantis

Kearfott Division, The Singer Co., Little Falls, N.J.

J. Dyn. Sys., Meas., Control 95(2), 199-203 (Jun 01, 1973) (5 pages) doi:10.1115/1.3426681 History: Received March 16, 1973; Online July 13, 2010

Abstract

This paper describes a unique single-axis, analog flueric accelerometer which has undergone laboratory evaluation over a range of 0–130 g’s. The device contains essentially no moving parts since the solid proof mass has been eliminated. The accelerometer consists of a hollow, porous cylinder with porous endwalls, and encapsulated within the cylinder is a heavy non-wetting liquid such as mercury. Surface tension prevents seepage of the liquid through the cylinder walls. In response to the local acceleration, the mercury develops large hydrostatic pressure gradients which are proportional to and aligned with the acceleration vector. The output is obtained in the form of a differential gas pressure, the magnitude of which is a direct function of acceleration. Details of the input fluid power requirements and representative output characteristics are presented.

Copyright © 1973 by ASME
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