A new section line extraction method of ring forgings based on normal vector and L1-median. (November 2021)

• Record Type: Journal Article
• Authors: Zhang, Yucun; Wang, Xiujiao; Li, Qun; Yan, Fang
• Is Part Of: Measurement. Volume 184(2021)
• Publication Date: 2021-11
• Subjects: Ring forgings -- Section line extraction -- Normal vector -- L1-median; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2021.109894
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: A new section line extraction method of ring forgings is proposed. An optimization algorithm based on normal vector and L 1 -median is established. The optimization algorithm is immune to noise and can preserve details. The optimization algorithm is suitable for a variety of point cloud models. Abstract: Ring forgings are widely used in industrial fields. It is an important way that the key dimensions of ring forgings are obtained by laser scanning to ensure the processing quality. It is difficult to extract high-precision section line of ring forgings from laser point clouds with a lot of noise. This paper presents a new method for extracting section line from raw point cloud of ring forging. An optimization algorithm is created based on the normal vector and L 1- median, which is used to iteratively shrink the sampling points for obtaining the section line of ring forgings. L 1 -median has the characteristics of noise immunity, adding normal vector can get more detailed features. The extraction of high-precision section line of ring forgings is realized. Taking the second-order ring forging and the third-order ring forging as the experimental object, experiments are carried out to verify the effectiveness of the model.