空间载波数字散斑干涉脉动微变形的全场测量

2018-08-17

作者：张恒飞1，吴思进1，李伟仙1，杨连祥2 单位：1北京信息科技大学；2奥克兰大学

摘要：本文运用空间载波数字散斑干涉法测量薄板的离面脉动微变形，实现了对非周期或非规则周期振动的动态定量测量，克服了传统频闪法数字散斑干涉测量对振动频率稳定性的严格要求。理论和试验证明，本方法能够测量微纳米级别的全场脉动变形，最大可测脉动频率与相机帧率和变形幅度相关。

关键词：数字散斑干涉；空间载波法；振动测量；变形测量

中图分类号：TG802；TH162文献标志码：A

Fullfield Measurement of Micro Deformation of Pulsation Using

Spatialcarrier Digital Speckle Pattern Interferometry

Zhang Hengfei，Wu Sijin，Li Weixian，Yang Lianxiang

Abstract:Outofplane microdeformation of pulsation is measured by use of spatialcarrier digital speckle pattern interferometry.Experiments show that nonperiodic or irregular periodic vibration can be quantitatively and dynamically determined.The ability to measure arbitrary vibrations makes spatialcarrier digital speckle pattern interferometry outperforms traditional stroboscopic digital speckle pattern interferometry which strictly requires the stability of vibration frequency during the measurement.Theory and experiments show that fullfield nanomicroscale deformations of pulsation can be measured and the measurable maximal frequency of pulsation depends on camera frame rate and deformation amplitude.

Keywords:digital speckle pattern interferometry；spatial carrier method；vibration measurement；deformation measurement