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US 4,783,997 AGranted
Ultrasonic transducers for high temperature applications
AssigneePanametrics, Inc.
InventorLawrence C. Lynnworth
Life of this patent
Estimating the term…
Abstract
A clamp-on ultrasonic transducer assembly for making ultrasonic measurements on solid materials in a temperature far removed from ambient. An electroacoustic transducer is coupled to the solid surface through an elongated buffer element enclosed within a housing which is mechanically coupled to the buffer element only in the region of contact between the buffer and the solid material to be measured.
Claims24
An ultrasonic transducer assembly for transmitting ultrasonic waves to, or receiving ultrasonic waves from a solid surface which is at a temperature differing substantially from ambient, comprising,
- an electroacoustic ultrasonic transducer;
- an elongated buffer element formed of a creep resistant material having predetermined acoustic transmission characteristics and capable of sustaining a substantial temperature gradient along its long dimension, said buffer element having a surface at one end formed for pressurized acoustic coupling to said solid surface, said electroacoustic transducer being acoustically coupled to the opposite end of said buffer element;
- a creep resistant housing of material different from that of said buffer element mechanically coupled to said buffer element over only a small portion of said longitudinal dimension close to the end of said buffer element formed for acoustic coupling to said solid surface, and
- means for applying pressurizing force between said housing element and said solid surface, said mechanical coupling between said housing element and said buffer being such that said pressurizing force is transmitted to said buffer element for establishing a pressurized acoustic coupling between said one end of said buffer element and said solid surface.
1 more element
Dependencies are inferred from the claim text.