铝蜂窝结构腐蚀的脉冲涡流检测研究.docx
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- 关 键 词:
- 蜂窝 结构 腐蚀 脉冲 涡流 检测 研究
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1、XX大学毕业设计(论文)题 目: 铝蜂窝结构腐蚀的脉冲涡流检测研究学 院: 测试与光电工程学院专业名称: 测控技术与仪器班级学号: 学生姓名: 指导教师: 二Oxx 年 六 月 铝蜂窝结构腐蚀的脉冲涡流检测研究摘要: 脉冲涡流检测技术是近些年新发展起来的一种无损检测技术,主要用来定量检测裂纹和腐蚀等缺陷。与传统的涡流技术相比,脉冲涡流信号激励使得响应信号中包含了更丰富的缺陷信息。在某些应用场合,这种因素使得脉冲涡流检测比传统的涡流检测技术更有优势。常规涡流检测技术在检测表面缺陷非常灵敏,但是很难检测到深层的缺陷。设计了TMR圆柱形传感器和TMR斜角式传感器对铝蜂窝结构进行了腐蚀缺陷检测。获取高
2、功率检测探头的差分信号,对铝蜂窝板的大腐蚀缺陷和小腐蚀缺陷进行检测。实验结果表明,设计的脉冲涡流探头能够较好的检测出铝蜂窝结构中的大小腐蚀缺陷。关键词: 脉冲涡流 差分信号 TMR 铝蜂窝板Study on pulsed eddy current detection of aluminum honeycomb structure corrosionAbstract:Pulsed eddy current is an innovative and nondestructive technology developing in the recent years and it is mainly u
3、sed for quantitative testing in crack and corrosion. Compared with the traditional eddy current technology, the excitation brought about by the pulse eddy signal makes the responsive signal contain richer information on defect in some application occasions, whose factors bring more advantages to pul
4、sed eddy current testing over traditional eddy current.Conventional eddy current testing technology is very sensitive in the surface defects detection, but it is difficult to detect the deep defects. The structure of aluminum honeycomb was detected by TMR column sensor and TMR bevel sensor. The diff
5、erential signal of the high power detector is acquired and the deep corrosion is detected. The sensing signal of linear array probe is divided into time slice, the instantaneous amplitude matrix of signal is obtained, and the structure corrosion of aluminum honeycomb is imaged and scanned. The exper
6、imental results show that the pulsed eddy current high power probe can detect the deep corrosion in the aluminum honeycomb structure. The linear array probe can scan the corrosion imaging.Keywords:Pulsed Eddy Current Differential signal TMR Aluminum honeycomb board目 录1. 前言1.1 选题依据及意义11.2 铝蜂窝复合板的国内外应
7、用21.3 研究内容及实验方案41.3.1 实验内容41.3.2 实验方案41.3.3 主要特色52. 脉冲涡流检测技术2.1 脉冲涡流检测原理62.2 脉冲涡流检测优点73. 检测系统的设计3.1 总框图83.2 检测系统各部件介绍83.2.1 激励源BP461083.2.2数据采集卡USB635693.2.3 Matlab93.2.4 LabVIEW104. 探头设计及试块制作4.1 检测探头设计的影响因素134.1.1 磁感应强度134.1.2 脉冲涡流磁感应强度的计算134.1.3 电涡流的渗透深度144.2 TMR简介154.3 试块的制作184.3.1 大缺陷试块的制作184.3.
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