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涡流无损检测技术在近年来取得了很大的发展,在工业检测领域有着重要的应用。在涡流检测系统的设计中,最为关键的是对缺陷信号进行提取。目前绝大多数涡流仪器都是基于阻抗分解技术进行缺陷信号的特征提取。在对特征提取技术的原理和实现方法进行了简要阐述的基础上,分析了模拟电路、DSP和传统FPGA实现的不足,提出了在ZYNQ平台上实现该算法的方案。该方案利用了ZYNQ平台的优势,使用软硬件协同设计和IP集成的设计思想,实现快速开发。利用ZYNQ片内互联总线,实现了动态参数可调。采用该方案实现的阻抗分解算法能够降低实现难度,且能够达到显著的缺陷提取效果。
Eddy current non-destructive testing technology has made great development in recent years, in the field of industrial testing has an important application. In the eddy current detection system design, the most critical is to extract the defect signal. At present, most of the eddy current instruments are based on the impedance decomposition of the defect signal feature extraction. Based on the brief introduction of the principle and implementation method of feature extraction, this paper analyzes the shortcomings of the implementation of analog circuits, DSPs and traditional FPGAs, and proposes a scheme to implement the algorithm on the ZYNQ platform. The program takes advantage of ZYNQ platform, using software and hardware co-design and IP integration design ideas, to achieve rapid development. Using ZYNQ chip interconnect bus, to achieve a dynamic parameter adjustable. The impedance decomposition algorithm using this scheme can reduce the difficulty of implementation and can achieve significant defect extraction.