Tatar Kourosh, Gren Per, Lycksam Henrik
Division of Experimental Mechanics, Luleå University of Technology, Sweden.
Appl Opt. 2008 Jun 20;47(18):3269-74. doi: 10.1364/ao.47.003269.
A digital holographic interferometry setup used to measure radial vibrations along a rotating shaft is presented. A continuous Nd:YAG laser and a high-speed digital camera are used for recording the holograms. The shaft was polished optically smooth to avoid speckle noise from the rotating surface. The light reflected from the shaft was directed onto a diffuser which in turn was imaged by the holographic system. Simultaneous measurements with a laser vibrometer were performed at one point and comparisons between the signals showed good agreement. It is shown that different vibration components of a rotating shaft can be simultaneously measured with this technique.
介绍了一种用于测量旋转轴径向振动的数字全息干涉测量装置。使用连续Nd:YAG激光器和高速数码相机记录全息图。轴经过光学抛光，表面光滑，以避免旋转表面产生散斑噪声。从轴反射的光被导向漫射器，漫射器再由全息系统成像。在某一点上与激光测振仪进行了同步测量，信号之间的比较显示出良好的一致性。结果表明，利用该技术可以同时测量旋转轴的不同振动分量。
