Omni-directional damage detection and localization with a 2-D piezoelectric ultrasonic phased array

摘要：

　　The disadvantages of linear arrays are such that the range of damage detection is limited up to only 180°, and also that the detection accuracy is very poor at angles close to 0° and 180°.In order to solve this problem, this paper puts forward a new damage detection and localization method by coupling the image enhancement technology with two-dimensional piezoelectric ultrasonic phased arrays arranged in the shape of a cross.The basic detection principle as well as the detailed process of damage localization will be covered in this paper.Along with the implementation of the cross-shaped sensor arrays, a new image enhancement algorithm is proposed with the aim to deal with the problem of phantom image emerging in the opposite side of the original image.The results of the experiments conducted on an aluminum plate show that the above proposed method can not only effectively solve the limitation of the linear sensor array,but.also accurately detect multiple damages in full angle mode.

关键词： structural health monitoring lamb waves ultrasonic phased array two dimension cross shape image enhancement multiple damages

作者: Wang Zhiling Yuan Shenfang Qiu Le Liu Bin

作者单位: The State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aer The State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aer

会议类型: 国际会议

会议名称: the International Conference Vibroengineering-2014

会议地点: 贵阳

会议语种:英文

页码: 300-305

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）