Engineering Research Equipment Grant: Laser Array Induced Ultrasound for Quality Control

该奖项是一个设备赠款购买Q开关 YAG激光器、隔振光学工作台和光学支架 装置. 这些设备将用于支持 发展超声的激光阵列生成领域。 这 技术将用于在线控制焊接质量在真实的- 时间，特别是焊缝熔深和气孔的深度。 超声波是一种很有前途的焊接质量控制方法， 它能够穿透不透明的物体， 不连续性 这项研究预计将产生一个显着更多的 非接触式激光产生超声波的有效技术， 用于材料和工艺的无损检测。 的 正在开发的技术使用激光束阵列代替 一束激光 一种非接触式电磁声学 传感器将被用作接收器。//

The award is for an equipment grant to purchase a Q-switched YAG Laser, vibration isolation optical table, and optical mounting devices. The equipment will be used to support research in the evolving area of laser array generation of ultrasound. This technology will be used on-line to control weld quality in real- time, in particular the depth of weld penetration and porosity. Ultrasonics is a promising method for weld quality control because of its ability to penetrate opaque bodies and be reflected at discontinuities. The research is expected to yield a significantly more efficient technique of noncontact laser generation of ultrasound, for nondestructive testing of materials and processes. The technique being developed uses an array of laser beams in place of a single laser beam. A noncontact electromagnetic acoustic transducer will be used as a receiver.//