Noncontacting Laser Vibrometer for Six Degrees of Freedom Positional Measurement

本研究的目的是开发一种非接触式系统 对于所有六个自由度的完整动态测量， 微型机械部件的位置和姿态。 这 信息通常是无法获得的，但在许多情况下， 新的工程应用。 该系统是基于监测三个 从部件上的小反射目标反射的激光束。 通过利用光束的几何原点和光束的位置， 相应的反射，所有六个自由度的位置， 可以确定目标。 这项研究将优化的几何形状， 激光器，目标和传感器，以实现最佳的 操作参数，同时优化整体尺寸。 的 将开发必要的硬件和软件， 频率真实的时间操作（30 KHz）。 设计将被原型化 并进行评估以确定操作限制， 能力的 研究的重点将放在系统上 开发，针对非接触模态的应用 结构分析。 具体而言， 旋转自由度的实验模态数据库 将使用新的测量能力进行检查， 这系统.

The objective of this research is to develop a noncontacting system for the complete dynamic measurement of all six degrees of freedom of position and attitude of miniature mechanical components. This information is generally not obtainable, yet it is essential in many new engineering applications. The system is based on monitoring three laser beams reflected from a small reflective target on the component. By utilizing the geometric origin of the beams and the position of the respective reflections, all six degrees of freedom of position of the target can be determined. The research will optimize the geometry of the lasers, targets, and sensors in order to achieve the best set of operational parameters while miniaturizing the overall size. The necessary hardware and software will be developed to achieve high frequency real time operation (30 KHz). The design will be prototyped and evaluated to determine the operational limitations and capabilities. The main research emphasis will be on system development, with applications directed at noncontacting modal analysis of structures. Specifically the incorporation of the rotational degrees of freedom into the experimental modal data base will be examined using the new measurement capability presented by this system.