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US 9,285,261 B2Granted
Acoustic flexural order level sensor
AssigneeStreet Smart Sensors LLC
InventorTerence J. Knowles
Life of this patent
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Abstract
A liquid level sensor includes a rod having a first portion and a second portion, and a wave generation unit affixed to one end of the rod. The wave generation unit generates a wave group that propagates in at least a shear order and a flexural order, and the frequency of the shear wave is based on the diameter of the rod.
Claims24
A liquid level sensor including:
- a rod having a first portion and a second portion;
- and
- a wave generation unit affixed to one end of the rod,
- wherein the wave generation unit generates a flexural wave that propagates in at least an order with longitudinal shear at a surface of the rod.
1 more element
A method of detecting the level of an aerated fluid including the steps of:
- generating a flexural wave that propagates down a rod in at least a first order, a second order, and a third order by a wave generation unit;
- trapping at least the third order of the wave in a first portion of the rod;
- analyzing a pulse train generated by the trapped wave order.
Dependencies are inferred from the claim text.