Application of ultrasonic phased array in acoustic logging
نویسندگان
چکیده
A new ultrasonic phased array transducer to increase the imaging resolution of the borehole wall is presented for acoustical logging. We fabricate a cylindrical phased array which is made up of 128 piezoelectric elements distributed on the surface of a cylinder uniformly. The working frequency of each element is 0.5MHz. Through the switch array, different combinations of the elements can lead acoustical beam rotating along the tangential direction inside the borehole. It is found that the acoustical fields can be focused very well for borehole wall imaging by dynamic focusing and good resolution can be obtained for crack testing.
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