Portable liquid crystal testing device

G - Physics – 01 – N

Patent

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G01N 29/00 (2006.01) A61B 8/00 (2006.01) A61B 10/00 (2006.01) G01H 9/00 (2006.01) G01N 29/04 (2006.01) G01N 29/06 (2006.01) G01S 7/52 (2006.01) G01S 15/89 (2006.01) G02F 1/13 (2006.01)

Patent

CA 1185692

ABSTRACT OF THE DISCLOSURE There is disclosed herein a portable device for inspecting bodies for internal flaws or other internal features. The device is constructed so as to be mounted on the surface of the body, emit and receive ultrasonic energy, and display the same on a liquid crystal display. The device includes a first housing member for supporting a transducer in relation to the surface being inspected. The device also includes a second housing mem- ber for supporting and positioning the liquid crystal display in relation to the surface and in relation to the transducer. Interconnecting means are provided for adjustably interconnecting the two members and fixing their positions in a reflection-receiving relation. The liquid crystal support housing is a substan- tially hollow tubular member having a viewing end and a surface contacting end. The liquid crystal display is positioned intermediate the ends. The contacting surface is constructed to be acoustically coupled to the surface of the body and a variable focal length ultrasonic lens is positioned between the coupling and liquid crystal display with acoustic transmission means being provided for transmitting sonic energy from the surface through the lens and to the display where it can be viewed. Optical enhancement means are provided at the viewing end of the housing for assuring a suitable visual image on the display. In use the portable tester is rested on the body to be inspected, the transducer and liquid crystal sup- port housings are aligned with respect to one another and fixed in position by the interconnecting means and then the transducer is excited so as to emit ultrasonic energy. Reflections or scattered ultrasonic energy from flaws or discontinuities within the body are received on the liquid crystal display where they are viewed.

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