在传统涡流检测技术的基础上,提出了可变阵列涡流检测技术的新方案,将多个检测线圈按一定方式排布,构成各式各样的线圈阵列;阵列中线圈的激励/接收组合可按一定规则进行动态配置,依此实现对线圈阵列覆盖下被检工件状况的动态扫描检测。讨论了扫描规则的建立原则和方法以及适用性。经实验验证,VAECT变阵涡流检测系统的单元检测灵敏度优于20μm人工裂纹深度,超过了此前业界普遍认为的30μm极限灵敏度。 On the basis of traditional eddy current testing technology, a new scheme of variable array eddy current testing technology is proposed. A plurality of testing coils are arranged in a certain way to form a variety of coil arrays. The excitation / reception combination of the coils in the array may be According to the rules of dynamic configuration, so as to achieve under the coil array cover the status of the workpiece under test dynamic scanning detection. Discussed the principles and methods of establishing scan rules and their applicability. Experimental verification, VAECT variable eddy current detection system unit detection sensitivity better than 20μm artificial crack depth, exceeding the industry generally considered 30μm limit sensitivity.