Measuring and testing – Gas analysis – By vibration
Patent
1983-12-19
1986-03-11
Nozick, Bernard
Measuring and testing
Gas analysis
By vibration
73592, 73597, 73703, G01N 3100
Patent
active
045746150
ABSTRACT:
A method and apparatus for detecting the presence of a gaseous substance within a space bounded by an enclosure utilizes the fact that sound is not transmitted through a vacuum and is transmitted through the material of the enclosure. A sonic wave transmitter and a sonic wave receiver are engaged with the material of the enclosure and separated by the space. Using the calculated arrival times and/or amplitudes for the soundwave portions through the space and through the material of the enclosure, it can be determined whether a soundwave portion has passed through the space and thus a leakage of gaseous substance into the space above a threshold amount has taken place.
REFERENCES:
patent: 4386527 (1983-06-01), Maucher
patent: 4432231 (1984-02-01), Napp et al.
Meredith R. W., Digital Data Acquisition System for Measuring Free Decay of Acoustical Standing Waves in a Resonant Tube, Rev. Sci. Instrum. 55(1) 1/84, pp. 116-118, (73-24).
Bower John R.
Hammond Charles W.
Edwards Robert J.
LaHaye D. Neil
Nozick Bernard
Simmons James C.
The Babcock & Wilcox Company
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