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电动换能器是一种无需直接物理接触、就能在金属物体中检测超声振动的器件。它特别适用于检验炽热的或表面粗糙的试件。虽然电动换能器比压电换能器效率损失大。但是,用精心设计的电动换能器能产生较好的效果或者比常规的超声检验得到的结果还好。在被覆管材研究试验室中,所研制的电动换能器能够在线检验温度高达1200℃以上的钢制品的内部和表面缺陷。另一种应用是采用兰姆波技术来检验有层状缺陷的钢管。
Electric transducers are devices that detect ultrasonic vibrations in metal objects without direct physical contact. It is particularly suitable for testing hot or rough surface specimens. Although the electric transducer is less efficient than the piezoelectric transducer. However, the use of well-designed electric transducers produces better results or results than conventional ultrasound tests. In the Coiled Tubing Research Laboratory, the electrodynamic transducers were developed to verify in-line and internal surface defects of steel products at temperatures up to 1200 ° C. Another application is the use of Lamb wave technology to test layered defects of steel.