Ultrasonic apparatus and method for measuring the characteristics of materials
摘要
Ultrasonic apparatus and method measures the characteristics of materials by sensing changes in the impedance to applied drive excitation of an ultrasonic probe using a crystal sensor that is integral with the ultrasonic transducer.
申请公布号
US4325255(A)
申请公布日期
1982.04.20
申请号
US19800137879
申请日期
1980.04.07
申请人
ENERGY AND MINERALS RESEARCH CO.
发明人
HOWARD, PAUL L.;TARPLEY, JR., WILLIAM B.;MOULDER, GEORGE R.;MCBRIDE, WILLIAM R.
