Method of non-invasively monitoring pressure of a compressed gas in a closed container
First Claim
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1. A method for non-invasively monitoring a pressure of a compressed gas inside a closed container having an outside wall, comprising:
- forming a magnetic circuit through a portion of the outside wall of the container;
generating a transient stress in the outside wall of the container;
detecting magnetic flux amplitude changes in the magnetic circuit created by the transient stress in the outside wall of the container;
producing data representing the magnetic flux amplitude changes; and
monitoring pressure changes from a nominal pressure by evaluating the data representing the magnetic flux amplitude changes.
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Abstract
A method for non-invasively monitoring a pressure of a compressed gas inside a closed container includes: forming a magnetic circuit through a portion of the outside wall of the container; detecting magnetic flux amplitude changes in the magnetic circuit created by a transient stress in the outside wall of the container; producing data representing the magnetic flux amplitude changes; and monitoring pressure changes from a nominal pressure by evaluating the data representing the magnetic flux amplitude changes.
61 Citations
18 Claims
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1. A method for non-invasively monitoring a pressure of a compressed gas inside a closed container having an outside wall, comprising:
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forming a magnetic circuit through a portion of the outside wall of the container; generating a transient stress in the outside wall of the container; detecting magnetic flux amplitude changes in the magnetic circuit created by the transient stress in the outside wall of the container; producing data representing the magnetic flux amplitude changes; and monitoring pressure changes from a nominal pressure by evaluating the data representing the magnetic flux amplitude changes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for non-invasively monitoring a pressure of a compressed gas inside a closed container having an outside wall, comprising:
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forming a magnetic circuit through a portion of the outside wall of the container; detecting magnetic flux amplitude changes in the magnetic circuit created by a transient stress in the outside wall of the container due to rapid depressurization of the container; producing data representing the magnetic flux amplitude changes; converting the data into an energy waveform that represents a measure of energy and evaluating the energy waveform; low pass filtering the energy waveform; and evaluating a performance of the depressurization of the container by determining an interval between a point in time from initiation of the rapid depressurization to a point in time at which the energy waveform first reaches a predetermined energy level. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification