| 钢板表面微裂纹的超声锁相热像检测技术研究 |
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| 引用本文： | 刘慧,刘俊岩,王扬.钢板表面微裂纹的超声锁相热像检测技术研究[J].光学精密工程,2010,18(3):653-661. |
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| 作者姓名： | 刘慧 刘俊岩 王扬 |
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| 作者单位： | 哈尔滨工业大学机电工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(No.60770802F-01);;黑龙江省科技攻关基金资助项目(No.GB06A512) |
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| 摘 要： | 为了提高超声锁相热像技术(ULT)的检测效率并获得最佳检测结果，对超声波调制、热图序列处理和检测参数选择进行了研究。阐述了超声锁相热像技术的检测原理，进行了理论分析；建立了ULT的检测系统，采用幅值方波调制的超声波对试件进行激励，利用红外热像仪记录热图，通过锁相处理得到试件表面热波的相位图和幅值图，利用幅值图和相位图实现钢板表面微裂纹的检测。结果表明：对于A3钢板材料，调制频率选择0.5Hz，接触压力仅需保证激励试件时激励头与试件接触不脱离，约0.25kN，激励头与表面微裂纹的距离对检测结果几乎无影响，激励位置可根据试件结构而确定。研制的超声激励装置组成的检测系统可数秒内即可完成对钢板表面微裂纹（微米级）的准确检测。
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| 关 键 词： | 超声红外热像技术 超声锁相热像 裂纹检测 |
| 收稿时间： | 2009-06-11 |
| 修稿时间： | 2009-07-12 |
Study of detection surface microcracks on metal plane using ultrasound lock-in thermography |
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| LIU Hui,Jun-yan Liu,Yang Wang.Study of detection surface microcracks on metal plane using ultrasound lock-in thermography[J].Optics and Precision Engineering,2010,18(3):653-661. |
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| Authors: | LIU Hui Jun-yan Liu Yang Wang |
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| Affiliation: | School of Mechatronics Engineering;Harbin Institute of Technology;Harbin 150001;China |
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| Abstract: | In order to improve the inspection efficiency of Ultrasound Lock-in Thermography (ULT) and to obtain optimal results, the ultrasound modulation, thermal sequence image processing and the optimal parameter selection were investigated. The principle of ULT was analyzed theoretically,then an inspection system was developed,and several experiments were carried out on the steel plane with surface (subsurface) microcracks and Al alloy with defects at different depths.In inspection, the modulated ultrasonic square... |
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| Keywords: | ultrasonic infrared imaging ultrasound lock-in thermography defect detection contacting interface-type defect |
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