Ice detecting apparatus and methods

Details Ice detecting apparatus and methods Ice detecting apparatus and methods

G - Physics

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G01S 15/04 (2006.01) B64D 15/20 (2006.01) G01B 17/02 (2006.01) G01H 15/00 (2006.01) G01N 29/11 (2006.01)

Patent

CA 2014961

ABSTRACT OF THE DISCLOSURE For detecting the presence of ice on an exposed surface such as an air foil surface of an aircraft, a sensor has a hollow body portion including a piezoelectric transducer which is energised to generate ultrasonic pulses which are directed internally of the sensor to an end surface thereof which is co-planar with the air foil surface. The pulses are reflected back to the transducer. In addition, the pulses are reflected back to the transducer by a shoulder in the sensor body and acting as a reference surface. The resultant signals produced by the transducer from the reflected pulses are processed so as to compare the amplitude of each pulse reflected by the end with the amplitude of each pulse reflected by the reference surface to produce an output indicating the presence and the thickness of ice on the air foil. 0829S

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