The Imaging of Plate Defect Based on Several Ultrasonic Piezoelectirc Arrays
摘 要
结合椭圆定位方法,分别采用了线型、十字型和时钟型超声压电晶片阵列对金属薄板中缺陷进行成像识别。根据Lamb波在薄板中的传播分析,选取激励信号及其参数,构建超声信号检测模型。依据椭圆轨迹原理进行成像,判断薄板中有无缺陷存在。通过压电陶瓷晶片加载脉冲激励信号,分别对三种情况进行数据处理并成像。结果证明十字型和时钟型阵列能有效地对缺陷成像,并避免了成像过程中的虚像。
Abstract
In the paper, ultrasonic linear array, cross array and clock-type array are used to image for defects of a thin plate with elliptical location method. According to Lamb wave propagation in the plate, the excitation signal and its parameters are selected and a model of ultrasonic signal detection is built up. Imaging is made based on the principle of elliptical trajectory and whether defects exist in the plate was determined. Excitation signal is generated by the piezoelectric ceramic wafer. Above-mentioned three kinds of arrays are used to acquire signals, which are then processed and imaged. The results show that it is effective to use cross array and clock-type array to do defect imaging and remove the effect of ghost generated in the process of imaging.
中图分类号 TG115.28 TB553
所属栏目 科研成果与学术交流
基金项目 铁道部科技研究开发计划资助项目(2011J011-E)
收稿日期 2012/2/27
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备注袁魁(1988-),男,硕士研究生,研究方向为超声检测成像。
引用该论文: YUAN Kui,SHEN Xi-Zhong. The Imaging of Plate Defect Based on Several Ultrasonic Piezoelectirc Arrays[J]. Nondestructive Testing, 2013, 35(3): 1~4
袁魁,沈希忠. 基于几种超声压电晶片阵列的金属板缺陷成像[J]. 无损检测, 2013, 35(3): 1~4
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【2】BINGHAMA J, HINDERSA M, FRIEDMAN A. Lamb wave detection of limpet mines on ship hulls[J]. Ultrasonics,2009,49(8):706-722.
【3】FUKUDA M, IMANO K, YAMAGISHI H, et al. Detection of the second harmonics of Lamb waves in fatigued magnesium plates[J]. Acoustical Science and Technology,2011,32(6):271-275.
【4】JEONG H, LEE J S, BAE S M. Defect detection and localization in plates using a lamb wave time reversal technique[J]. International Journal of Precision Engineeringand Manufacturing,2011,12(3):427-434.
【5】BAO J J. Lamb Wave Generation and Detection with Piezoelectric Wafer Active Sensors[D]. Columbia, US: University of South Carolina,2003.
【6】MALINOWSKI P, WANDOWSKI T, TRENDAFILOVA I, et al. A phased array-based method for damage detection and localization in thin plates[J]. Structural Health Monitoring,2009,8(1):5-15.
【7】WILCOX P D. Omni-directional guided wave transducer arrays for the rapid inspection of large areas of plate structures[J]. Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on,2003,50(6):699-709.
【8】彭海阔,孟光,李富才.一种基于压电晶片阵列的板结构损伤识别方法[J].振动与冲击,2009,28(9):56-59.
【9】袁慎芳.结构健康监控[M].北京:国防工业出版社,2007.
【10】SU Z,YE L, LU Y. Guided lamb waves for identification of damage in composite structures: a review[J]. Journal of Sound and Vibration,2006,295:753-780.
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