| 基于衍射横波的裂纹激光超声检测方法 |
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| 引用本文： | 王玉庆,王云霞,马世榜.基于衍射横波的裂纹激光超声检测方法[J].激光技术,2019,43(4):546-550. |
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| 作者姓名： | 王玉庆 王云霞 马世榜 |
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| 作者单位： | 郑州信息科技职业学院 机电工程学院,郑州,450008;郑州电力高等专科学校 电气工程系,郑州,450000;南阳师范学院 机电工程学院,南阳,473061 |
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| 基金项目： | 河南省高校重点科研基金资助项目;南阳师范学院博士科研专项 |
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| 摘 要： | 为了评估表面开口裂纹,采用激光超声衍射横波的方法测量其参量.激光激励的横波传播至裂纹尖端产生衍射信号,随后被处于裂纹另一侧的传感器所接收.依据不同接收点衍射横波的渡越时间,推导出裂纹参量的计算公式;模拟分析了横波在工件中的传播过程,搭建了裂纹的激光超声测量实验系统,并采集了衍射横波数据.结果表明,在有效的检测范围内,测量值与实际值之间的误差在5%之内.该结果可促进激光超声在表面裂纹检测中的应用.
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| 关 键 词： | 测量与计量 开口裂纹测量方法 有限元分析 激光超声 衍射横波 |
| 收稿时间： | 2018-09-10 |
Crack detection based on laser ultrasound diffraction transverse wave |
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| WANG Yuqing,WANG Yunxia,MA Shibang.Crack detection based on laser ultrasound diffraction transverse wave[J].Laser Technology,2019,43(4):546-550. |
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| Authors: | WANG Yuqing WANG Yunxia MA Shibang |
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| Affiliation: | (School of Mechanic Electronic Engineering, Zhengzhou Vocational University of Information and Technology, Zhengzhou 450008, China;Department of Electrical Engineering, Zhengzhou Electric Power College, Zhengzhou 450000, China;School of Mechanic and Electronic Engineering, Nanyang Normal University, Nanyang 473061, China) |
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| Abstract: | In order to evaluate surface breaking cracks, laser ultrasonic diffraction shear wave method was used to measure its parameters. Laser-induced shear wave propagating to the crack tip produced a diffraction signal and then the signal was received by the sensors on the other side of the crack. According to the transit time of diffracted shear waves at different receiving points, the formulas for calculating crack parameters were derived. The propagation process of the shear wave in the workpiece was simulated and analyzed. The experimental system of laser-ultrasonic crack measurement was established. The diffraction shear wave data were also collected. The experimental results show that, within the effective detection range, the error between the measured value and the actual value is within 5%. The results can promote the application of laser ultrasound in surface crack detection. |
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| Keywords: | measurement and metrology measurement method of surface-breaking crack finite element analysis laser ultrasound diffraction transverse wave |
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