G - Physics – 01 – P
Patent
G - Physics
01
P
349/33, 349/39,
G01P 5/00 (2006.01) G01S 15/58 (2006.01) G10K 11/02 (2006.01) G10K 11/24 (2006.01) G21C 17/032 (2006.01)
Patent
CA 1120579
Abstract of the Disclosure A method and apparatus for transmission of ultrasound to and reception of ultrasound from a fluid from outside its container. An ultrasonic transducer generates sound waves longitudinally in a trans- mission bar that has a reflecting surface at such an angle with the ultrasonic path that the longitudinal waves are internally reflected as shear waves in the direction of an interface between the transmission bar and the fluid. The impinging of the shear-mode waves on the interface results in an efficient transmission of energy into the fluid and an effi- cient reception of echo signals from the fluid. Since longitudinal waves are coupled from the transducer to the metal, a rigid bond between trans- ducer and metal is unnecessary. The coupling may be achieved by means of a liquid-filled interface that does not subject the delicate transducer to damage from stresses produced by differential thermal expansions.
299573
Combustion Engineering Inc.
Smart & Biggar
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