微波检测焊接裂纹的一维距离成像技术

胡秀娟; 邓甲昊; 周志峰; 桑会平

微波检测焊接裂纹的一维距离成像技术

1.
上海工程技术大学机械工程学院, 上海 201620
2.
北京理工大学宇航科学技术学院, 北京 100081
3.
电子科技集团54所, 石家庄 050000

基金项目:

上海工程技术大学启动基金资助项目(07-21)

详细信息

作者简介:
胡秀娟 (1978-), 女, 讲师, 工学博士, 研究方向为数字信号处理、数字图像处理及中近程探测与控制。

中图分类号: TG115.28
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出版历程
- 收稿日期: 2008-08-30
- 刊出日期: 2009-06-09

Study on Microwave Testing of Welding Crack One-Dimensional Range Profiling Technique

摘要

摘要: 提出了将步进频脉冲信号应用于微波检测。基于散射中心模型, 分析了该信号检测焊接裂纹的机理, 给出了步进频脉冲波形设计准则。通过仿真, 其模糊函数表明该波形具有高的距离分辨率, 从而使获得焊接裂纹的一维距离成像成为可能。在分析和设计的基础上, 提出了IFFT(逆傅里叶变换)成像算法, 并对其成像原理进行了分析。结果表明, 该算法可实现基于步进频脉冲的焊接裂纹的一维距离成像。在一般条件下, 对该算法进行了仿真, 仿真结果表明该算法可得到实际焊接裂纹的全程一维距离像。
- 微波检测 /
- 成像技术 /
- 焊接裂纹 /
- 信号处理 /
- 步进频脉冲信号 /
- 一维距离成像
Abstract: Stepped frequency pulse signal was applied in microwave nondestructive testing, which was advanced by this paper. Based on scattering center model the theory of stepped frequency pulse testing of weld track was analyzed. The analyzed results manifested this kind of waveform can test weld track. The designing rule of waveform parameters were given out. By simulating the fuzzy ambiguity function of stepped frequency waveform manifested this waveform possessed high range resolution rate, which was the basement of gaining one-dimensional range profile of welding track. Based on the above analysis and designation IFFT profiling algorithm was advanced and its profiling theory was analyzed. The results manifested this algorithm could realize the one-dimensional range profile of welding track. Under the common conditions this algorithm was simulated and the results meant using it could gain the whole one-dimensional range profile of welding track.
- Microwave nondestructive testing /
- Imaging technique /
- Welding crack /
- Signal processing /
- Stepped frequency pulse signal /
- One-dimensional range profile

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参考文献(10)

[1]	张令涛.微波无损检测成像算法的研究[D].沈阳: 沈阳工业大学, 2005.
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微波检测焊接裂纹的一维距离成像技术

作者简介: 胡秀娟 (1978-), 女, 讲师, 工学博士, 研究方向为数字信号处理、数字图像处理及中近程探测与控制。

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出版历程

Study on Microwave Testing of Welding Crack One-Dimensional Range Profiling Technique

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出版历程

目录

作者简介:
胡秀娟 (1978-), 女, 讲师, 工学博士, 研究方向为数字信号处理、数字图像处理及中近程探测与控制。