Pulsed Laser ESPI Applied to Particular Rotating Component Problems
Pulsed Laser ESPI Applied to Particular Rotating Component Problems
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DOI：
10.1117/12.952371
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发表时间：
1986-07
期刊：
影响因子：
--
通讯作者：
R. W. Preater
中科院分区：
文献类型：
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作者：
R. W. Preater
在工作条件下测量旋转部件的面内应变是一个有吸引力的命题。脉冲激光电子散斑干涉术（ESPI）具有全息干涉术的精度，可用于小应变的测量。脉冲激光器的短脉冲宽度“冻结”了部件运动，并克服了传统的全息稳定性要求，这表明该技术在工业环境中具有潜在的用途。电视散斑图像的电子处理提供了平面内位移的干涉图样信息的即时显示。良好的对比度干涉条纹已经实现了在城市大学的组件切向速度高达120 ms-1的组件转速为10500 rpm的范围内。传统光学系统的使用揭示了该技术的一定速度限制。然而，最近对光学系统的修改已经消除了这一限制，并显示出其切向速度超过目前的120 ms-1的组件的potentiallanalysis。
The measurement of in-plane strain under service conditions on components that are rotating is an attractive proposition. Pulsed laser Electronic Speckle Pattern Interferometry (ESPI) which possesses the accuracy of holographic interferometry may be used for the measurement of small strains. The short pulse width of the pulsed laser "freezes" the component motion and overcomes the conventional holographic stability requirements showing this technique to have potential use in an industrial environment. Electronic processing of television speckle images provides an immediate display of interference pattern information for in-plane displacements. Good contrast interference fringes have already been achieved at The City University over a range of component tangential velocities up to 120 ms-1 for a component rotational speed of 10500 rpm. Use of the conventional optical system reveals a certain speed limitation to the technique. However, recent modifications to the optical system have removed this limitation and show potentiallanalysis of components whose tangential velocities are in excess of the present 120 ms-1.