激光超聲多通道接收器在无损检测应用的必威体育精装版进展.docVIP

RECENT PROGRESS IN LASER ultrasonic Multi-dectectors Receivers for non destructing evaluation A. Wartelle1, B.Pouet1, S.Breugnot1 ,Bai Xiaobao2 1Bossa Nova Technologies, 2Matrix U/E technology Inc. ABSTRACT. New laser interferometric schemes were recently introduced in order to fully take advantage of possibilities offered by laser-based ultrasonic (LBU) inspection and to broaden their integration into industrial inspection systems and laboratories setups. First, we will present the recent advances on a fiberized LBU receiver optimized for industrial applications. We will show an example of results with thickness monitoring on moving sample using zero group velocity Lamb wave resonance. Secondly, we will present the latest progress in a LBU laboratory receiver, with the development of an adaptive interferometer able to measure simultaneously both in-plane and out-of-plane displacements. Advantages of this receiver for the study of ultrasound propagation will be demonstrated with mapping of in-plane and out-of-plane displacements generated by a thermoelastic laser source. Keywords: Speckle, ultrasound, quadrature, two-wave mixing, interferometer, laser. 激光超声多通道接收器在无损检测应用的必威体育精装版进展 A. Wartelle1, B.Pouet1, S.Breugnot1 ,白小宝2 1Bossa Nova Technologies, 2矩阵科技有限公司 摘要： 该激光干涉技术充分利用了激光超声检测(LBU)的优越性，将其应用到工业检测系统和实验室研究。首先介绍了为工业应用而优化的光纤激光超声接收器的进展，将演示一个使用群速度为零的兰姆波检测移动工件厚度的例子。然后介绍了LBU实验室级接收器的必威体育精装版进展，必威体育精装版研发的自适应干涉仪能同时测量面内和面外的位移，通过绘制一个由热弹性激光源所产生的面内和面外的位移来说明这种接收器在超声传播方面的应用。 ???? 关键词：光斑，超声，正交，二波混频，干涉仪，激光 INTRODUCTION Laser-based ultrasonic (LBU) is now becoming a more mature technology, making the transition from research laboratory equipment to industrial on-line measurement system. However, among the various optical techniques available, only few have been successfully implemented in industrial environment. To date, LBU industrial inspection systems are still mostly based on the confocal Fabry-Pérot interferometer [1, 2]. The main well-known advantages of LBU are its ability to p