Measuring and testing – Moisture content or absorption characteristic of material
Patent
1974-09-17
1976-01-06
Wilbur, Maynard R.
Measuring and testing
Moisture content or absorption characteristic of material
324 60CD, 324 61R, G01D 700, G01N 918
Patent
active
039304051
ABSTRACT:
The detection of acoustic emissions emanating from an object is achieved with a capacitive transducer coupled to the object. The capacitive transducer is charged and then allowed to discharge with the rate of discharge being monitored. Oscillations in the rate of discharge about the normally exponential discharge curve for the capacitive transducer indicate the presence of acoustic emissions.
REFERENCES:
patent: 2788516 (1957-04-01), Girerd
patent: 3604251 (1971-09-01), Dixon
patent: 3716782 (1973-02-01), Henry
patent: 3824459 (1974-07-01), Uchinda
Blum T. M.
Carlson Dean E.
Churm Arthur A.
Gottlieb Paul A.
The United States of America as represented by the United States
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