CASIA OpenIR  > 精密感知与控制研究中心
A High Precision and Fast Alignment Method based on Binocular Vision
Gao H(高晗)1,2; Shen F(沈飞)1,2,3; Zhang F(张峰)1,2,3; Zhang ZT(张正涛)1,2,3
Source PublicationINTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING
2022
Volume0Pages:0
SubtypeSCI
Abstract

Alignment tasks for precision electronics manufacturing require high accuracy and low time consumption. However, in the current industrial environment, multiple servo alignment operations are often required to achieve the desired accuracy targets, which is time-consuming. In this paper, a high precision, fast alignment method based on binocular vision is proposed, which allows the accurate movement of the workpiece to the target position in only one alignment operation, without the need for a standard calibration board. Firstly, a calibration method of the telecentric lens camera is proposed based on an improved nonlinear damped least-squares method to establish the relationship between the image coordinate system and the local world coordinate system in the binocular vision system. Secondly, in order to transform the coordinates from the local world coordinate system to a unified coordinate system with the platform’s rotation center as the origin, an angle constraint-based rotation center calibration method is proposed. Thirdly, a two-stage feature point detection method based on shape matching is proposed to detect the feature points of the workpiece. Based on these, the position and pose of the workpiece are obtained. Then the alignment commands are calculated based on the current and the target position and pose of the workpiece, enabling the accurate alignment to be accomplished in one operation. Finally, taking the mobile phone’s cover glass alignment task as an example, a series of calibration and alignment experiments were carried out. The experiments and results show that the alignment errors are within ±0.020mm and the time taken to calculate alignment commands is less than 20ms, which demonstrates the effectiveness of the proposed method.

KeywordVisual Alignment, Binocular Vision, Camera Calibration, Image Processing
MOST Discipline Catalogue工学::控制科学与工程
DOI10.1007/s12541-022-00674-7
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ia.ac.cn/handle/173211/48928
Collection精密感知与控制研究中心
精密感知与控制研究中心_精密感知与控制
Corresponding AuthorShen F(沈飞)
Affiliation1.中国科学院自动化研究所
2.中国科学院大学
3.中科慧远视觉技术有限公司
First Author AffilicationInstitute of Automation, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Automation, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao H,Shen F,Zhang F,et al. A High Precision and Fast Alignment Method based on Binocular Vision[J]. INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING,2022,0:0.
APA Gao H,Shen F,Zhang F,&Zhang ZT.(2022).A High Precision and Fast Alignment Method based on Binocular Vision.INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING,0,0.
MLA Gao H,et al."A High Precision and Fast Alignment Method based on Binocular Vision".INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING 0(2022):0.
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