The design principle, circuit analysis, and transducer construction of the low frequency ultrasonic tester are described. The applications to testing concretes and rocks are discussed.
The principle and construction of the transducer are briefly presented and the working principle, design of the system as well as the main generator and detector circuit are introduced in the paper.
3
介绍了超声波振动拔管的原理，以及超声波振动拔管换能器的设计情况。
The paper covers information regarding the working principle of the ultrasonic vibration pipe-drawing process and the design of the energy transducer as well.
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