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基于轮廓特征的点阵尺寸可溯源测量

Traceable Dimensional Measurement for Lattices Based on Contour Features

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摘要

工业计算机断层扫描(CT)是对点阵结构增材制件进行尺寸特征检测的有效选择,但目前缺少统一的工业CT尺寸测量误差评价方法,因此首先通过三坐标测量机和孔板标准器实现工业CT尺寸测量误差的评定,然后提出基于轮廓特征的点阵结构周期性尺寸测量方法,最后通过实例验证该方法的有效性。结果表明,该工业CT的最大允许误差(MPE)能够达到±(50+L/400) μm,满足当前检测要求。轮廓特征提取法能够实现点阵结构周期性尺寸特征的测量。

Abstract

Industrial computed tomography (CT) is an effective tool for measuring the dimensional characteristics of lattice structures in additive manufacturing parts. However, currently there is no uniform method to evaluate the dimensional measurement errors of industrial CT. Therefore, in this paper, we first evaluate the dimensional measurement errors of industrial CT using a coordinate measuring machine and a hole plate standard; then, we propose a method for conducting the periodic dimensional measurements of the lattice structure based on contour features. Finally, the effectiveness of the method is verified via an example. The result shows that the maximum permissible error of the industrial CT can reach ±(50+L/400) μm, which meets the current testing requirements. The contour feature extraction method can be applied to measuring the periodic dimensional features of lattice structures.

Newport宣传-MKS新实验室计划
补充资料

DOI:10.3788/AOS201939.1212006

所属栏目:仪器,测量与计量

基金项目:国家自然科学基金、十三五国防装备预研项目、装备预研航天科工联合基金、国家商用飞机制造工程技术研究中心创新基金项目、国防基础科研计划;

收稿日期:2019-05-09

修改稿日期:2019-09-02

网络出版日期:2019-12-01

作者单位    点击查看

苏仕祥:南京航空航天大学机电学院, 江苏 南京 210016
戴宁:南京航空航天大学机电学院, 江苏 南京 210016
程筱胜:南京航空航天大学机电学院, 江苏 南京 210016
喻长江:南京航空航天大学机电学院, 江苏 南京 210016
雷鹏福:南京航空航天大学机电学院, 江苏 南京 210016

联系人作者:戴宁(dai_ning@nuaa.edu.cn)

备注:国家自然科学基金、十三五国防装备预研项目、装备预研航天科工联合基金、国家商用飞机制造工程技术研究中心创新基金项目、国防基础科研计划;

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引用该论文

Su Shixiang,Dai Ning,Cheng Xiaosheng,Yu Changjiang,Lei Pengfu. Traceable Dimensional Measurement for Lattices Based on Contour Features[J]. Acta Optica Sinica, 2019, 39(12): 1212006

苏仕祥,戴宁,程筱胜,喻长江,雷鹏福. 基于轮廓特征的点阵尺寸可溯源测量[J]. 光学学报, 2019, 39(12): 1212006

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