Ultrasonic method and apparatus for detecting and...

Details Ultrasonic method and apparatus for detecting and... Ultrasonic method and apparatus for detecting and...

G - Physics

01

S

G01S 15/88 (2006.01) B64D 15/20 (2006.01) G01N 29/09 (2006.01) G01N 29/44 (2006.01) G01N 29/10 (1990.01)

Patent

CA 2120639

A method and an apparatus for detecting and identi- fying a contaminant, such as ice, on the surface of a structure, such as a wing, are disclosed. The apparatus has a probe having a delay block with an interface apt to be placed flush with the surface of the structure and two faces at the same angle of inclination relative to the interface and having transmission and reception trans- ducers each oriented perpendicularly to one of the faces. The block has an acoustic impedance lying in the range of 0.7 to 3 x 10 6 kg/m2.s. It further has an energization and analysis unit for applying an electrical energization pulse to the transmission transducer and comparing the amplitude and the phase of the echo from the interface with a reference echo corresponding to no contamination.

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