Method and means for measuring acoustic emissions

Measuring and testing – Moisture content or absorption characteristic of material

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Details

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

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