Title: Method and means for measuring acoustic emissions

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.

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Inventors: Renken, Jr., Claus J. (Holts Summit, MO, US)

Application Number: 506819
Filing Date: 1974-09-17
Publication_date: 1976-01-06
Assignee: The United States of America as represented by the United States Energy (Washington, DC)
Primary Class(es): 73/587 73/658, 73/801
Other Classes:
US Patent Ref:

2788516	Apr, 1957	Girerd	324/60.
3604251	Sep, 1971	Dixon	179/111.
3716782	Feb, 1973	Henry	324/60.
3824459	Jul, 1974	Uchinda	324/60.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Blum, T. M.
Attorney: Carlson; Dean E., Churm; Arthur A., Gottlieb; Paul A.