基于FPGA的电磁金属探伤系统及其微弱信号处理  

Metal Electromagnetic Detection System and Weak Signal Processing Based on FPGA

作　　者：马骏[1] 何敏[1] 杨鸣[1] 

机构地区：[1]上海海事大学物流工程学院,上海201306

出　　处：《测试技术学报》2014年第5期425-430,共6页Journal of Test and Measurement Technology

摘　　要：本文介绍了一种基于FPGA的电磁金属探伤系统,该系统用于研究电磁无损检测技术在金属板损伤探测上的应用.在该电磁金属探伤系统中,传感系统提供的测量感应信号为强噪声背景下的微弱信号.为了提高信号的检测精度,本文采用信号调理电路结合FIR数字滤波的方法,将基于FPGA的电磁成像金属探伤系统中微弱的测量感应信号从噪声中提取出来,仿真实验证明,该方案能为后续信号处理环节提供一个低噪声背景下的较强的感应信号.A metal electromagnetic detection system is introduced in this paper ,which provides a platform to research the application of electromagnetic testing technology on metallic plates .In the electromagnetic metal detection system ,the sensor signal is a weak signal under strong noise background .In order to improve the ac-curacy of the detection ,combined signal conditioning circuit with FIR digital filter to extract the signal based on FPGA from noise .The simulation results show that this program provides a stronger ,low-noise sensor sig-nal for the subsequent demodulation part .

关 键 词：FPGA 电磁金属探伤系统 微弱信号处理 

分 类 号：TM55[电气工程—电器] TP206.1[自动化与计算机技术—检测技术与自动化装置]