Analyzing internal pressure of a closed container

Details Analyzing internal pressure of a closed container Analyzing internal pressure of a closed container

1996-01-16

1997-10-07

Williams, Hezron E.

Measuring and testing

Testing sealed receptacle

73 493, G01M 300

Patent

active

056750749

ABSTRACT:
A method of analyzing internal pressure of a closed container includes inducing vibration in a surface of a closed container; detecting sound resulting from the vibration; deriving information representing the detected sound; and determining whether the information corresponds to a predetermined spectral frequency condition and a predetermined spectral amplitude condition. The surface is at least partially conductive and inducing includes imposing a magnetic field on the surface. The predetermined spectral frequency condition and the predetermined spectral amplitude condition correspond to ranges of acceptable values. The detected sound is used to determine whether the closed container contains a pressure level within a predetermined range of pressure levels.

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