涡流检伤信号高速实时采集系统的研究  

Research on High-speed and Real-time Eddy Current Data Acquisition System

作　　者：刘康 彭乐锋 刘继 

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201800

出　　处：《微处理机》2017年第6期86-89,共4页Microprocessors

摘　　要：涡流无损检测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。作为涡流探伤设备的重要环节,高速信号实时采集传输模块的速度的稳定性通常是设备的瓶颈所在。硬件平台采用Xilinx公司的Zynq SoC,同时集成软件平台基于Linux操作系统,通过AXI DMA传输FIFO的涡流检伤数据到DDR内存,供上位机用户程序使用。比较轮询和中断两种机制启动AXI DMA,确定中断方式可以实现实时采集和处理而无数据丢失情况。同时Linux驱动中断处理程序采用Netlink消息机制通知用户程序启动AXI DMA。经测试,该涡流信号采集系统传输速度和稳定性满足性能要求。In recent years, eddy current nondestructive testing has made great progress, and has an important application in the industrial inspection field. As an important part of eddy current testing instru-ment, the speed stability of high-speed signal real-time acquisition and transmission module is usually the bottleneck of the equipment operation. Zynq SoC from Xilinx Company is chosen as the hardware platform, while the software platform is based on Linux operation system, and through AXI DMA, FIFO eddy current test data is transferred to DDR memory to supply upper computer user program for use. By comparing the two mechanism of polling and interrupt to start AXI DMA, it is determined that the interrupt method can anchieve the real-time acquistion and disposal without data loss. At the same time, Netlink message mech-anism is chosen by Linux diver interrupt disposal program to inform user program to start AXI DMA. After test, it is proved that the speed and stability of this eddy current signal acquisition system can meet the performance requirement.

关 键 词：涡流检测 Zynq片上系统 片内扩展总线 直接内存存取 中断 Netlink套接字 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]