第19卷第7期 2011年7月
文章编号
1004-924X(2011)07-1480-06
光学精密工程
Optics and Precision Engineering
数字散斑相关法在变形测量中的应用
陈志新1,2，梁晋1，郭成1*
（1.西安交通大学机械工程学院，陕西西安710049； 2.东华理工大学机电工程学院，江西南昌330013）
Vol. 19No.7
Jul.2011
摘要：为了克服传统的变形测量方法的局限性，实现整体变形和测量范围内各点在任一时刻具体位移的全面测量，以得到完整的变形数据，本文采用数字相关散斑法(DSCM)对变形进行了精确测量。首先，通过与传统变形测量方法进行比较，归纳出DSCM具有非接触、精度高、操作简单灵活、测量全面等优点。然后，描述了散班法的基本理论，建立了相关的数学模型，并根据相关理论开发了相应的测量分析软件XJTUDIC。利用该软件结合相应的硬件设备，对具体的拉伸变形过程进行了测量试验，并将结果与使用引伸计的传统测量方法进行了比较。得到的结果显示两种测量方法的误差在士0.2%之内，验证了该方法及相应软件和硬件的可靠性及可行性，为变形的全面精确测量提供了一种有效的工具。关键调：数字数斑相关法；变形测量；XJTUDIC
中图分类号：TH823;O436.1
文献标识码：A
doi:10.3788/OPE.20111907.1480
Applicationof digital specklecorrelationmethod
todeformationmeasurement CHEN Zhi-xin'-*, LIANG Jin', GUO Cheng
(l.MechanicalEngineerCollege,Xi'anJiaotongUniversity,Xi'an710049,China;
2.MechanicalElectricalEngineeringDepartment,
EastChinaInstituteofTechnology,Nanchang 330013,China)
*Correspondingauthor,E-mail:gch@mail.rjtu.edu.cn
Abstract: To overcome the limitations of traditional deformation measurement methods and complete the comprehensive measurements of the general deformation and the various point displacements with in a measurement scope in any time, the Digital Speckle Correlation Method(DSCM) was used in accu-rate deformation measurement. Firstly, by comparison with traditional methods, it summarized the advantages of the method in non-contact, high precision, simpie and flexible operation, overall meas uring and so on, And then the principles of the DSCM were elaborated on the five aspects, the rele-vant mathematical models were established and the corresponding measurement and analysis software XJTUDIC was developed. By using this software with the relevant hardware devices, a tensile de-formation process was tested and obtained results were compared with that of traditional measurement method using an extensometer. Obtained results indicate that the error is within O. 2%, which fully
收稿日期：2010-10-08；修订日期：2010-11-29.
基金项目：国家自然科学基金资助项目（No.50975219)；苏州市应用基础研究计划（工业部分）资助项目（No.
SYG201014）