作者：徐劲澜, 梁晋, 赵鹏亮, 张桁维, 孟繁昌

作者单位：西安交通大学机械工程学院 机械制造系统工程国家重点实验室, 陕西 西安 710049

关键词：光学测量;手机跌落试验;数字图像相关;全场应变

摘要：

手机跌落试验主要用于检验手机质量，有限元分析模拟仿真方法能够帮助厂家在产品开发阶段优化手机结构，但不能对成品实物进行质量检验。针对上述问题，该文提出一种基于光学测量的手机跌落试验方法，采用双目立体视觉原理，利用摄影测量技术，提高数字图像相关法匹配精度，使用高速相机对手机跌落过程进行连续采集，提高系统标定精度后通过图像数据计算分析获取手机跌落过程中的全场位移及应变值。该文用华为荣耀4A手机前壳进行试验，成功获取其跌落过程中的三维全场变形数据，证明基于数字图像相关法手机跌落试验方法具有高精度、试验过程简便等优点，满足成品手机质量检测的需求。

Application of optical measurement method in mobile phone dropping test
XU Jinlan, LIANG Jin, ZHAO Pengliang, ZHANG Hengwei, MENG Fanchang
State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Abstract: Mobile phone dropping test is mainly used for examining the quality of mobile phone. Although the finite element analysis simulation method can help to optimize the structure of mobile phone in product development phase, it is unable to inspect the quality of the finished products. Therefore, this paper puts forward a new method based on optical measurement, in which the principles of binocular stereo vision photogrammetric technology and digital image correlation method are used to calculate and analyze the data coming from the images during the cell phone dropping process obtained by the high speed camera to acquire three-dimensional full field displacement and strain after improving the calibration precision of the system. The new method is proved to have some advantages such as high precision and simple test process after calculation and analysis of the three-dimensional full field deformation data collected through testing of the front shell of Huawei Honor 4A. And it also proves that the method can completely satisfy the needs of mobile phone quality testing.
Keywords: optical measurement;mobile phone drop test;digital image related;full strain field
2019, 45(1):34-39  收稿日期: 2017-05-25;收到修改稿日期: 2018-03-09
基金项目: 国家自然科学基金（51421004，51675404）
作者简介: 徐劲澜(1992-),男,四川宜宾市人,硕士,研究方向为三维检测
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