剪切散斑干涉术中剪切量的测量

贾大功; 武立强; 马彩缤; 张红霞; 张以谟

doi:10.3788/OPE.20122002.0226

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剪切散斑干涉术中剪切量的测量

现代应用光学 | 更新时间：2020-08-12

- 剪切散斑干涉术中剪切量的测量
- Shear measurement of shearing speckle interferometry
- 光学精密工程 2012年20卷第2期页码：226-232
- 作者机构：
  
  天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室天津,300072
- 作者简介：
- 基金信息：
  
  国家973重点基础研究发展计划资助项目(No.2010CB327604,2010CB327806)();天津市自然科学基金资助项目(No.09JCYBJC01300)(
- DOI：10.3788/OPE.20122002.0226
  中图分类号： O436.1
- 收稿日期：2011-07-20，
  
  修回日期：2011-09-08，
  
  网络出版日期：2012-02-25，
  
  纸质出版日期：2012-02-25
- 稿件说明：
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贾大功, 武立强, 马彩缤, 张红霞, 张以谟. 剪切散斑干涉术中剪切量的测量[J]. 光学精密工程, 2012,20(2): 226-232

JIA Da-gong, WU Li-qiang, MA Cai-bin, ZHANG Hong-xia, ZHANG Yi-mo. Shear measurement of shearing speckle interferometry[J]. Editorial Office of Optics and Precision Engineering, 2012,20(2): 226-232
贾大功, 武立强, 马彩缤, 张红霞, 张以谟. 剪切散斑干涉术中剪切量的测量[J]. 光学精密工程, 2012,20(2): 226-232 DOI： 10.3788/OPE.20122002.0226.

JIA Da-gong, WU Li-qiang, MA Cai-bin, ZHANG Hong-xia, ZHANG Yi-mo. Shear measurement of shearing speckle interferometry[J]. Editorial Office of Optics and Precision Engineering, 2012,20(2): 226-232 DOI： 10.3788/OPE.20122002.0226.

摘要

由于采用剪切散斑干涉术测量离面应变和面内应变都与剪切量有关

所以剪切量的测量精度决定了应变场分布测量的准确性。本文论述了公式法、成像法、莫尔条纹法和相关法等4种剪切量测量法的测量原理

定性分析了它们的测量范围。搭建了一套剪切量测量系统

利用成像法、莫尔条纹法、相关法测量剪切散斑系统的剪切量

并以公式法计算的结果为准

比较其他3种方法的测量结果。结果表明:剪切量>3 mm时

利用相关法测量具有较高的测量精度;剪切量<3 mm时

莫尔条纹法测量效果会更好。因此

实际应用中

应该先根据实际测量条件估算剪切量的大致范围

然后依据估算范围选择合适的测量方法。

Abstract

Since the shear directly determines the displacement gradients of both out-of-plane and in-plane in the shearing speckle interferometry

the measurment precision of the shear should be improved to obtain the accurate strain distribution during the measurements of out-of-plane and in-plane strains. In this paper

four methods for the shear measurement: formula method

imaging method

Moir fringe method and correlation method are compared in detail. An experimental setup is established to measure the shear using the imaging method

Moir fringe and correlation method. The measurement results based on the three methods are compared with that of the formula method as a criterion. The result shows that when the shear is more than 3 mm

the correlation method has higher accuracy; however

once the shear is less than 3 mm

the Moir fringe has higher accuracy. It suggests that the appropriate measurement method can be chosen after estimating the amount of the shear to obtain the higher out-of-plane and in-plane strains.

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references

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