2011•Piezoelectrics and AcoustoopticsRequires access

Study on the Effect of Array Element Damage on the Directivity of Transducer Array

Tianwen Yang

Abstract

Aimed at revealing the effect of the array element damage on the ultrasonic transducer array directivity,the formula for calculating the directivity of planar array composed of circular piston transducers is deduced theoretically,by which the directivity variation due to the transducer damage is analyzed.The results showed that the damage of the transducer located in the array center influenced the array directivity significantly greater than that of the transducer located in circumference;it is not true that the directivity in all orientation plane become worse due to the transducer damage,but it is no doubt that the overall directivity will become worse.

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Key concepts: Directivity, Transducer, Acoustics, Planar array, Piston (optics), Ultrasonic sensor, Planar, Plane (geometry)