Pointed to the disadvantages such as low recognizing precision, long training time and limited recognizing range of single neural network in eddy current testing, layered multi-subnet neural network was presented.

• 摘要针对单一神经网络在涡流无损检测中存在识别精度低、训练时间长和识别范围小的缺点，提出了一种适用于实时在线检测的神经网络结构?层次式多子网神经网络。