Method of non-invasively monitoring pressure of a compressed gas in a closed container
AssigneeTEMIC Bayern-Chemie Airbag GmbH
InventorsHegeon Kwun, Michael Allen Piskie, Tony Gioutsos
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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.
Claims18
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.
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;
- 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.
Dependencies are inferred from the claim text.