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首页> 《中国测试》期刊 >本期导读>一种针对蜂窝芯外形曲面特征的丈量方法

一种针对蜂窝芯外形曲面特征的丈量方法

334    2019-07-26

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作者:刘蕾1, 陈雪梅1, 易元1, 宋忠超2, 黄庆奕1, 江磊2

作者单位:1. 成都飞机工业(集团)有限责任公司, 四川 成都 610092;
2. 西南交通大学机械工程学院, 四川 成都 610031


关键词:机械公差配合与技术丈量;曲面特征丈量;光学扫描;蜂窝芯


摘要:

针对蜂窝芯外形曲面特征丈量过程中出现的数据不完整、精度低等问题,提出一种基于三维光学扫描的丈量方法。首先在蜂窝芯外形曲面紧密贴合覆盖层,以覆盖层外形特征代替蜂窝芯外形曲面特征,然后采取三维光学扫描技术采集覆盖层外形的点云数据。通过计算点云数据的法向矢量,并在矢量方向偏置覆盖层厚度,从而获得蜂窝芯曲面特征的轮廓数据,完成蜂窝芯外形曲面特征丈量。通过对某型号蜂窝芯资料的丈量,证明该方法的可行性和精确性,具有实际工程应用价值。


A method for measuring the shape and surface characteristics of honeycomb core
LIU Lei1, CHEN Xuemei1, YI Yuan1, SONG Zhongchao2, HUANG Qingyi1, JIANG Lei2
1. Chengdu Aircraft Industrial (Group) Co., Ltd., Chengdu 610092, China;
2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Abstract: To solve the problems of incomplete data and low precision in the process of feature measurement of honeycomb core surface, a method based on 3D optical scanning was proposed. First, the covering layer was laminated on the surface of the honeycomb core, then cloud data of the cover layer was collected by optical scanning as a substitute for contour data of honeycomb core surface feature. By calculating the normal vector of the cloud data and making an offset whose size was the thickness of the covering layer in the vector direction, contour data of honeycomb core surface feature was obtained. The feasibility and accuracy of the method are proved by the measurement of a honeycomb core material in practice. The results show that the method can be applied to the measurement of the surface characteristics of honeycomb core materials and has the realism value in engineering applications.
Keywords: mechanical tolerance and technical measurement;surface feature measurement;optical scanning;honeycomb core
2019, 45(7):56-60  收稿日期: 2017-09-28;收到修改稿日期: 2017-11-15
基金项目: 四川省科技支撑计划项目(2014GZ0123)
作者简介: 刘蕾(1985-),少女,河北石家庄市人,工程师,主要从事机械加工及加工质量检测工作
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