Ultrasonic radiation balance

Details Ultrasonic radiation balance Ultrasonic radiation balance

1977-08-24

1978-08-08

Swisher, S. Clement

Measuring and testing

Vibration

By mechanical waves

G01H 312

Patent

active

041049233

ABSTRACT:
A radiation balance for testing the power of ultrasonic transducers involves a balance mechanism wholly immersed in transmission liquid in a windowed vessel to avoid surface tension effects. The mechanism comprises a target connected for movement with the coil of a moving coil/magnet assembly, such as from a galvanometer, and a null-seeking servomechanism energizes the coil in response to balance mechanism movement. The balance movement is about a vertical axis to avoid gravitational effects, and the target has neutral buoyancy.

REFERENCES:
patent: 2052550 (1936-09-01), Alder
patent: 2939542 (1960-06-01), Weller et al.
patent: 3915017 (1975-10-01), Robinson

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