Ultrasonic transducer

G - Physics – 01 – B

Patent

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Details

G01B 17/02 (2006.01) G01C 3/00 (2006.01) G01K 3/08 (2006.01) H01L 41/04 (2006.01)

Patent

CA 2033153

An ultrasonic piezoelectric transducer and a method for measuring and/or monitoring various physical properties of a member, in-situ, are disclosed. The transducer includes a sleeve which is received in a blind bore provided in the member, a piezoelectric element positioned within the blind bore, and an aligning spacer means interposed between the end of the sleeve and the piezoelectric element. By the application of appropriate voltage pulses to the piezoelectric element causing interrogating signals to be applied to the member, and the measurement of the time interval between the application of an interrogating signal and the receipt of a return signal from the member, various physical properties of the member and structural information regarding same can be determined.

L'invention est constituée par un transducteur à ultrasons piézoélectrique et par une méthode utilisés pour mesurer et/ou surveiller in situ diverses propriétés physiques d'un corps. Ce transducteur comprend un manchon qui est introduit dans un orifice pratiqué dans le corps en question, un élément piézoélectrique qui est placé dans cet orifice et une cale d'alignement qui est placée entre l'extrémité du manchon et cet élément piézoélectrique. En appliquant des impulsions de tension appropriées à l'élément piézoélectrique pour transmettre des signaux d'interrogation au corps en question, et en mesurant l'intervalle de temps entre l'application d'un signal d'interrogation et la réception du signal réfléchi par le corps, on peut déterminer diverses propriétés physiques de ce corps et obtenir des informations sur sa structure.

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