| 基于Lamb波相控阵和图像增强方法的损伤监测 |
| |
| 引用本文： | 孙亚杰,袁慎芳,邱雷,蔡建,王强.基于Lamb波相控阵和图像增强方法的损伤监测[J].航空学报,2009,30(7):1325-1330. |
| |
| 作者姓名： | 孙亚杰 袁慎芳 邱雷 蔡建 王强 |
| |
| 作者单位： | 南京航空航天大学 智能材料与结构航空科学重点实验室 |
| |
| 基金项目： | 国家自然科学基金(60772072);;国家“863”计划(2007AA03Z117);;航空支撑基金 |
| |
| 摘 要： | 利用Lamb波和超声相控阵理论对结构进行损伤监测。选择合适的低频窄带激励信号，产生单一模式Lamb波，结合超声相控阵技术对结构进行多方位监测。针对原始损伤图像不完美的问题，研究基于点运算的对比度增强方法，改善图像质量，提高图像的可识别度和分辨率。在复合材料板结构和铝板结构中针对不同损伤类型的实验研究证明，运用图像增强技术后的损伤图像表征清晰、识别度高。
|
| 关 键 词： | 结构健康监测 图像增强 相控阵 相位延迟 损伤图像 |
| 收稿时间： | 2008-05-06 |
| 修稿时间： | 2008-09-10 |
Structural Health Monitoring Based on Lamb Wave Phased Array and Image Enhancement |
| |
| Sun Yajie,Yuan Shenfang,Qiu Lei,Cai Jian,Wang Qiang.Structural Health Monitoring Based on Lamb Wave Phased Array and Image Enhancement[J].Acta Aeronautica et Astronautica Sinica,2009,30(7):1325-1330. |
| |
| Authors: | Sun Yajie Yuan Shenfang Qiu Lei Cai Jian Wang Qiang |
| |
| Institution: | The Aeronautic Key Laboratory of Smart Material and Structure, Nanjing University of Aeronautics and Astronautics |
| |
| Abstract: | This article introduces the principle of structure damage identification based on phased array and Lamb wave technology. A single mode Lamb wave is excited by selecting a suitable low frequency narrow bandwidth signal. Then it is combined with ultrasonic phased array theory to monitor the structure condition and identify the damage in the structure multidirectionally. In view of the imperfection of the damage image,the method of point-to-point based contrast enhancement is used to improve the image quality ... |
| |
| Keywords: | structural health monitoring image enhancement phased array phase delay damage image |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空学报》浏览原始摘要信息 |
| 点击此处可从《航空学报》下载免费的PDF全文 |
