作者：朱魁章1, 程腾2, 仰叶1, 张文君1, 高越2, 苏勇2, 徐小海2, 张青川2
作者单位：1. 中国电子科技集团公司第十六研究所, 安徽 合肥 230043;
2. 中国科学技术大学, 安徽 合肥 230027
关键词：制冷机振动;数字图像相关;三维;全场测试
摘要：
为快速准确测试斯特林制冷机在工作时的振动状态,建立一种基于数字图像相关(DIC)的非接触三维全场测试新方法。该方法通过对制冷机表面的自然或人工标识进行图像相关分析,获得制冷机表面的外形(或标识)位移和应变的非接触三维全场测量,对测量的三维位移场进行傅里叶分析,进一步计算制冷机表面(或标识)的三维全场振动,实现制冷机振动振幅与频率的高精度无接触测量。通过斯特林制冷机的三维振动测试结果表明:该方法不仅能作为斯特林制冷机振动输出测量的新方法,还能有效应用于其他运动物体的振动输出测量。
A non-contact three-dimensional and full-field testing method for stirling cryocooler vibration based on DIC
ZHU Kuizhang1, CHENG Teng2, YANG Ye1, ZHANG Wenjun1, GAO Yue2, SU Yong2, XU Xiaohai2, ZHANG Qingchuan2
1. The 16th Institute of China Electronics Technology Group Corporation, Hefei 230043, China;
2. University of Science and Technology of China, Hefei 230027, China
Abstract: A new method of non-contact three-dimensional full-field measurement was established to quickly and accurately detect the vibration state of running Stirling cryocoolers based on digital image correlation (DIC). By analyzing the image correlation of natural or artificial identification on the surfaces of Stirling cryocoolers, the method obtained the three-dimensional non-contact full-field measurement data of shapes (shapes or identifications), displacements and strains of the machine surfaces; by using Fourier analysis for the measured three-dimensional displacement fields, it further calculated the three-dimensional full-field vibration of machine surfaces, realizing high-precision non-contact measurement of the amplitude and frequency of machine vibration. The test results show that this method can be used both as a new method for measuring vibration output of Stirling cryocoolers and an efficient technique for measuring the vibration outputs of other moving objects.
Keywords: cryocooler vibration;digital image correlation;three-dimension;full-field testing
2015, 41(5): 1-4 收稿日期: 2014-12-19;收到修改稿日期: 2015-1-13
基金项目: 国家自然科学基金资助项目(11372300,11127201)
作者简介: 朱魁章(1962-),男,四川巴中市人,研究员,主要从事低温制冷与真空技术研究。
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