【作者】 冯文斌；

【导师】 樊景云；

【作者基本信息】 哈尔滨理工大学 ， 材料学， 2004， 硕士

【摘要】 以电磁无损检测自动系统为代表的快速电磁无损检测系统在现代化工业生产中广泛的应用,实现了对金属工件产品质量的快速实时检测与控制,这一发展趋势推动了快速、数字化的电磁无损检测设备的研究。我们课题组在WGF-X系列微机式钢铁材质自动分选仪的基础上探索研究能够适应电磁无损检测自动线的高速数字化的电磁无损检测设备。为此,本课题开始以数字信号处理器为核心电磁无损检测试验装置的研究。由于电磁检测对多种参数的敏感反应,必须消除检测过程中的多种干扰因素。本试验装置采用实时数字信号处理技术,通过对信号在频域内进行分析,提取待检测参数的相关信号,从而达到对金属件进行快速检测的目的。本文详细论述了基于数字信号处理的电磁无损检测试验装置的理论基础,详细介绍了前置模拟系统的具体设计步骤以及数字信号处理系统的硬件和软件设计思路及实现。最后,本文提供脉冲信号输入时在CSS2.0调试平台下的频谱图,并且对螺栓工件进行测试,但由于时间等多方面的原因数字信号处理器在电磁无损检测中的优越性能没有得到体现。更多还原

【Abstract】 The electromagnetic nondestructive-testing system, which has been representative for the fast electromagnetic nondestructive-testing equipment, has been widely used in industry .It realizes rapid real-time testing and control for quality of metal work pieces. Which has been promoting the research of fast and digital NDT device. Our research group has been digging into the testing device of NDT based on series of WGF-X (steel and iron auto-separation device of embedded SCM). So, I have been beginning to research NDT based on digital signal processor.All kinds of disturbance should be eliminated, because there have been multifarious influences in the process of testing. By analyzing in the frequency domain and using real-time digital signal processing technology in the testing device, correlative signal of testing parameter was picked-up, accordingly realized rapid testing of metal work pieces.This paper has discussed the theory of electromagnet nondestructive testing device based on digital signal processing, and has introduced detailed design of front analog device, hardware and software of digital signal processor device. Finally frequency spectrum chart based on Code Composer Studio 2.0 was offered and a series of bolts was tested. For all kinds of reasons, the advantage of digital signal processor applying to NDT didn’t embodied.更多还原