AutoScan系列复杂零件自动化三维测量装备开发与应用

doi:10.7527/S1000-6893.2020.24863

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AutoScan系列复杂零件自动化三维测量装备开发与应用

李中伟¹, 张攀¹, 钟凯¹, 李文龙²

1. 华中科技大学材料科学与工程学院材料成形与模具技术国家重点实验室, 武汉 430074;
2. 华中科技大学机械科学与工程学院数字制造装备与技术国家重点实验室, 武汉 430074

收稿日期:2020-10-12 修回日期:2020-11-09 发布日期:2020-12-08
通讯作者: 李中伟 E-mail:zwli@hust.edu.cn
基金资助:
国家自然科学基金（51675208）；湖北省自然科学基金杰出青年基金项目（2019CFA045）；湖北省技术创新专项（重大项目）（2019AAA008）；湖北省重点研发计划项目（2020BAB137）

Development and application of AutoScan series automated 3D measuring equipment for complex parts

LI Zhongwei¹, ZHANG Pan¹, ZHONG Kai¹, LI Wenlong²

1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received:2020-10-12 Revised:2020-11-09 Published:2020-12-08
Supported by:
National Natural Science Foundation of China (51675208);Excellent Young Program of Natural Science Foundation in Hubei Province (2019CFA045);The Major Project of Technological Innovation in Hubei Province(2019AAA008);Key Research and Development Program of Hubei Province (2020BAB137)

摘要/Abstract

摘要： 自动化三维测量可实现复杂零件的精度检测，为后续工艺优化提供基础数据，是保证航空航天领域复杂零件成形精度的关键技术，但应用时尚存在以下问题：其一，自动化三维测量视点规划仍以人工示教为主，规划效率低、效果差；其二，锻造成形等工业现场工况恶劣，易使系统预先标定的参数发生漂移，测量精度难以保证；其三，多视测量数据拼接仍主要采用标志点拼接的方式，过程繁琐，应用局限大；其四，在线自动化测量时受工装夹具等影响，测量点云中存在大量背景噪声，影响数据自动处理的精度与稳定性。针对上述难题，介绍了基于双目测头的自动化测量视点规划、基于耦合焦距比例约束的系统参数自标定、基于全局优化的多视测量数据拼接、基于自适应阈值迭代最近点（ICP）点云背景噪声自动去除等关键技术；在此基础上，研制了系列自动化三维测量装备，包括PowerVirtualPlan视点规划软件、PowerScan三维测量软件、iPoint3D数据处理软件的开发；最后，介绍自动化三维测量装备在航天航空等领域的工程应用情况。

关键词: 自动化三维测量, 测量视点规划, 系统参数自标定, 多视测量数据拼接, 点云背景噪声去除, 精度检测

Abstract: Automated 3D measurement can realize precision inspection of complex parts and provide basic data for subsequent process optimization. It is a key technology to ensure the forming accuracy of complex parts in the aerospace field. However, it encounters four challenges in application:viewpoint planning of automated 3D measurement is still based on manual teaching, leading to inefficiency and poor performance; harsh environment of industrial sites such as the forging site can easily cause drift of the pre-calibration parameters of the system, and the measurement accuracy cannot be guaranteed; registration of multi-view measurement data still mainly adopts the method of marked points registration, which is complicated and has great limitations in application; affected by tooling and fixtures during online automated measurement, there is a large amount of background noise in the measurement point cloud, which affects the accuracy and stability of automated data processing. To overcome these problems, this paper introduces the key technologies such as automated measurement viewpoint planning based on binocular measuring equipment, self-calibration of system parameters based on coupled focal length ratio constraints, measurement data registration of multi-view based on global optimization, and background noise removal of point cloud based on adaptive threshold Iterative Closest Point (ICP). A series of automated 3D measurement equipment is developed, including PowerVirtualPlan viewpoint planning software, PowerScan 3D measurement software, and iPoint3D data processing software. Application of automated 3D measurement equipment in aerospace and other fields are also presented.

Key words: automated three-dimensional measurement, measurement viewpoint planning, self-calibration of system parameter, multi-view measurement data registration, removal of background noise of point cloud, precision measurement

中图分类号:

V260.6

李中伟, 张攀, 钟凯, 李文龙. AutoScan系列复杂零件自动化三维测量装备开发与应用[J]. 航空学报, 2021, 42(10): 524863-524863.

LI Zhongwei, ZHANG Pan, ZHONG Kai, LI Wenlong. Development and application of AutoScan series automated 3D measuring equipment for complex parts[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(10): 524863-524863.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

AutoScan系列复杂零件自动化三维测量装备开发与应用

Development and application of AutoScan series automated 3D measuring equipment for complex parts

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