A Flueric Gas-To-Liquid Interface Amplifier

[+] Author and Article Information
Robert L. Woods

Fluidic Systems Research Branch, Harry Diamond Laboratories, Washington, D. C.

J. Dyn. Sys., Meas., Control 95(2), 196-199 (Jun 01, 1973) (4 pages) doi:10.1115/1.3426680 History: Received March 16, 1973; Online July 13, 2010


In certain applications it is necessary to control the flow of liquid by means of pneumatic signal. This paper discusses the design and operation of a flueric amplifier that accomplishes this control without moving parts or diaphragms and with no intermixing of fluids. The amplifier operates with pneumatic pressure-field deflection of a slightly turbulent liquid power jet. The amplifier has “infinite” input impedance since there is no measurable steady-state control flow over a large range of input pressures. Single-stage pressure gains of 25 and extremely high power gains have been achieved. The amplifier has a minimum dynamic range of 25 and a bandwidth suitable for many applications.

Copyright © 1973 by ASME
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