【作者】 徐明亮；

【导师】 何辅云；

【作者基本信息】 合肥工业大学 ， 信号与信息处理， 2003， 硕士

【摘要】 本文对整个超大管径钢管漏磁探伤系统做了探讨与研究。利用微分的思想将大直径钢管分成一个个小的钢板单元分别进行检测。利用ANSYS有限元分析软件对磁路设计，缺陷的模式识别进行了分析研究，并设计了超大管径钢管漏磁探伤监控系统。 在本文中首先讨论了漏磁探伤的基本原理，有限元分析原理及其在电磁场中的应用，介绍了ANSYS有限元分析软件的应用，并对缺陷进行了模拟分析。 在此基础之上对磁路的设计进行了研究，同时对缺陷的深度识别(即缺陷是在外壁还是在内壁，还是在中间)、缺陷的定量分析进行了研究。 然后对缺陷漏磁模拟信号的去噪处理，缺陷漏磁信号的采集和A／D转换、数字信号的去噪处理进行了探讨。因为是计算机自动检测，需要将外部所有的信号通过数据采集卡接入计算机进行控制和处理。所以本文还对接口信号的安排作了讨论。 最后讨论了WINDOWS操作系统的特点，软件设计的要求。在此基础之上对数据采集卡的驱动程序以及检测监控的应用软件进行了编写。 本文研究讨论的重点是超大管径钢管漏磁探伤的磁路设计、缺陷的深度判别和有关的定量分析、漏磁探伤监控系统可视化的实现。更多还原

【Abstract】 In this paper we discusses magnetic flux leakage testing of plate. We research the design of magnetization device and recognition of vice. We also research programming of the monitor system of magnetic flux leakage testing equipment for the steel plate.Above all, we discuss the basic theory of magnetic flux leakage testing in this paper and the theory of finite of element. We also introduce the application of the finite element in analysis of electromagnetic and the use of the software of ANSYS, which is a software about finite element. We analyze the magnetic field and its distributing characteristic, and the leakage magnetic field of vice and its distributing characteristic, with ANSYS.Then we research the design of magnetization device and the recognition of vice. We also research the analog signals and digital signal processing in order to eliminate noise, disturb and A/D conversion. We also discuss some simple filter arithmetic.At last we discussed the characteristic of operation system of Windows 95. Research the programming of HY6070 VxD and the monitor system based on the Windows.The emphasis of this paper is the design of magnetization device, the recognition of vice, the programming of the monitor system of the steel plate testing based on the operation system Windows 98 and analog signals and digital signal processing.更多还原