1
David K Hsu, Frank J Margetan, Samuel J Wormley, Jeffrey A Simpson: Apparatus and method for detection of icing onset and ice thickness. Jeffrey A Simpson, Theodore A Johnson, Griffin Branigan & Butler, March 17, 1992: US05095754 (25 worldwide citation)

An apparatus and method for detection of icing onset and ice thickness upon an accretion surface utilizing ultrasonic echo ranging techniques, including propagation of ultrasonic waves through a buffer block. A portion of the wave energy is reflected by reference reflection means and another portion ...


2
Robert B Thompson, Samuel J Wormley, George A Alers: Means and method for ultrasonic measurement of material properties. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, October 13, 1992: US05154081 (23 worldwide citation)

The system for field measurement of texture, stress and related material properties such as formability parameters using ultrasonic velocity measurements through crystalline plate or sheet. Electromagnetic acoustic transducers are utilized to generate, transmit, and receive ultrasonic bursts through ...


3
Donald O Thompson, Samuel J Wormley: Non-destructive evaluation means and method of flaw reconstruction utilizing an ultrasonic multi-viewing transducer data acquistion system. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, March 28, 1989: US04817016 (22 worldwide citation)

A multi-viewing ultrasound transducer acquisition system for non-destructive evaluation, flaw detection and flaw reconstruction in materials. A multiple transducer assembly includes a central transducer surrounded by a plurality of perimeter transducers, each perimeter transducer having an axis of t ...


4
R Bruce Thompson, Samuel J Wormley: Semi-automatic system for ultrasonic measurement of texture. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, September 17, 1991: US05048340 (17 worldwide citation)

A means and method for ultrasonic measurement of texture non-destructively and efficiently. Texture characteristics are derived by transmitting ultrasound energy into the material, measuring the time it takes to be received by ultrasound receiving means, and calculating velocity of the ultrasound en ...


5
Emmanuel P Papadakis, Steve F Russell, Samuel J Wormley: Direct-sequence spread-spectrum ultrasonic testing device. Iowa State University Research Foundation, Flehr Hohbach Test Albritton & Herbert, October 31, 1995: US05461921 (13 worldwide citation)

Techniques for providing an ultrasonic flaw detection system are disclosed. A continuous wave of wide-band direct-sequence spread-spectrum signals continuously drives one or more transmitting transducers, thereby flooding a test object with coded ultrasound. In operation, the ultrasonic testing syst ...


6
Michael S Hughes, David K Hsu, Donald O Thompson, Samuel J Wormley: Ultrasonic unipolar pulse/echo instrument. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, April 6, 1993: US05199299 (11 worldwide citation)

An ultrasonic unipolar pulse/echo instrument uses active switches and a timing and drive circuitry to control electrical energy to a transducer, the discharging of the transducer, and the opening of an electrical pathway to the receiving circuitry for the returning echoes. The active switches utiliz ...


7
David K Hsu, Frank J Margetan, Michael D Hasselbusch, Samuel J Wormley, Michael S Hughes, Donald O Thompson: Means and method for nonuniform poling of piezoelectric transducers. Iowa State University Research Foundation, Zarley McKee Thomte Voorhees & Sease, October 9, 1990: US04961252 (6 worldwide citation)

An apparatus and method for nonuniform poling of piezoelectric transducers includes machining one or more indentation into an end of a piezoelectric rod and cutting the rod to present a thickened disk shape. Highly electrically conductive material is deposited on at least the indentations in the one ...