Back to results
US 7,739,909 B2Granted
Acoustic fluid level monitoring
AssigneeGM Global Technology Operations LLC
InventorsAxel Heise, Christian Sachs
Life of this patent
Estimating the term…
Abstract
A product including a cryogenic container and an acoustic sensor positioned to sense the resonant frequency of the container and any liquid contents therein.
Claims29
A product comprising:
- a cryogenic container and an acoustic sensor positioned to sense a resonant frequency of the container and any liquid contents therein wherein no impulse generator is used with the acoustic sensor.
A cryogenic container assembly comprising:
- an inner container defining a storage area in which a fluid is stored;
- an outer container provided outside of the inner container;
- an insulation layer provided between the inner container and the outer container;
- and
- an acoustic sensor attached to the outer container or within the insulation layer wherein no impulse generator is used in the cryogenic container assembly.
2 more elements
A method of measuring a fluid level of a cryogenic container comprising:
- measuring an acoustic resonant frequency of a cryogenic container;
- and
- correlating the acoustic resonant frequency of the cryogenic container to a fluid level inside the cryogenic container wherein the cryogenic container further comprises a storage area and the correlating step further comprises:
- measuring a first acoustic resonant frequency of the cryogenic container while the storage area is empty;
- and
- measuring a second acoustic resonant frequency of the cryogenic container while the storage area contains a liquid.
3 more elements
Dependencies are inferred from the claim text.