Ultrasonic waveguide

Details Ultrasonic waveguide Ultrasonic waveguide

1992-10-22

1994-02-22

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Miscellaneous

73644, 12866301, 381154, 181400, H04B 1100

Patent

active

052894363

ABSTRACT:
An ultrasonic waveguide includes a fluid-tight thin-walled tube filled with a viscous, compressible fluid. One end of the tube is coupled to a transducer for transforming electrical energy into waves of ultrasonic energy which propagate the length of the tube. The other end of the tube has a window or refracting "shoe" for transmitting or refracting the propagating ultrasonic wave therethrough. The tube has a substantially constant cross section, preferably circular. The internal diameter of the preferred circular tube is in the millimeter regime, preferably from 0.25 to 1 mm. The wall material is preferably metal, plastic or metal/plastic composite.

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patent: 4722346 (1988-02-01), Chen
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patent: 4972826 (1990-11-01), Koehler et al.
Yeh et al., "Dynamics of a Cylindrical Shell System Coupled by Viscous Fluid", J. Acoust. Soc. Am., vol. 62, No. 2, 262-70 (1977).
Warburton, "Vibration of a Cylindrical Shell in an Acoustic Medium," J. Mech. Eng. Sci., vol. 3, No. 1, 69-79 (1961).
Terhune et al., "Wave Motion of a Compressible Viscous Fluid Contained in a Cylindrical Shell," Proc. ASME PV&P Conf., 231, 4-50 (1992).

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