Measuring and testing – Vibration – By mechanical waves
Patent
1983-10-04
1985-09-03
Frankfort, Charles
Measuring and testing
Vibration
By mechanical waves
374117, 374210, 136212, 136225, G01N 900
Patent
active
045384649
ABSTRACT:
A method for determining reactive acoustic power density level and its direction in a fluid using a single sensor is disclosed. In the preferred embodiment, an apparatus for conducting the method, which is termed a thermoacoustic couple, consists of a stack of thin, spaced apart polymeric plates, selected ones of which include multiple bimetallic thermocouple junctions positioned along opposite end edges thereof. The thermocouple junctions are connected in series in the nature of a thermopile, and are arranged so as to be responsive to small temperature differences between the opposite edges of the plates. The magnitude of the temperature difference, as represented by the magnitude of the electrical potential difference generated by the thermopile, is found to be directly related to the level of acoustic power density in the gas.
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Migliori Albert
Swift Gregory W.
Wheatley John C.
Eklund William A.
Frankfort Charles
Gaetjens Paul D.
Hightower Judson R.
The United States of America as represented by the United States
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