Publication detail
Multi-view camera system for measurement of heavy forgings
HURNÍK, J. ZATOČILOVÁ, A. KONEČNÁ, T. ŠTARHA, P. KOUTNÝ, D.
English title
Multi-view camera system for measurement of heavy forgings
Type
journal article in Web of Science
Language
en
Original abstract
Open-die forging is used to manufacture heavy durable parts such as shafts. In-process measurements are required for shape correction. The passive 3D measurement method is based on forging silhouettes in images and has demonstrated its advantages in this application. However, when using two cameras, only four tangents are available to determine the cross-section. In this paper, we propose a novel multi-camera multi-observation method for forging measurements; it increases the number of tangent lines used to determine the forging cross-section. The results suggest a decrease in measurement error proportional to the square root of the observation number. The six-observation precision is +/- 0.5 mm in a measurement volume of 6 x 6 x 2 m for axis straightness and diameter measurements (95% confidence interval). However, many outliers remain in case of diameter measurement. In addition, the forging circularity can be measured. The proposed system shows good agreement with the laser scanning measurement method. Overall, the system has considerable potential for forging manufacturing applications.
English abstract
Open-die forging is used to manufacture heavy durable parts such as shafts. In-process measurements are required for shape correction. The passive 3D measurement method is based on forging silhouettes in images and has demonstrated its advantages in this application. However, when using two cameras, only four tangents are available to determine the cross-section. In this paper, we propose a novel multi-camera multi-observation method for forging measurements; it increases the number of tangent lines used to determine the forging cross-section. The results suggest a decrease in measurement error proportional to the square root of the observation number. The six-observation precision is +/- 0.5 mm in a measurement volume of 6 x 6 x 2 m for axis straightness and diameter measurements (95% confidence interval). However, many outliers remain in case of diameter measurement. In addition, the forging circularity can be measured. The proposed system shows good agreement with the laser scanning measurement method. Overall, the system has considerable potential for forging manufacturing applications.
Keywords in English
Axis; Diameter; Edge detection; Forging; Measurement; Laser scanner; Silhouettes
Released
27.07.2022
Publisher
SPRINGER LONDON LTD
Location
LONDON
ISSN
0268-3768
Volume
121
Number
11-12
Pages from–to
7295–7310
Pages count
16
BIBTEX
@article{BUT178695,
author="Jakub {Hurník} and Aneta {Zatočilová} and Tereza {Konečná} and Pavel {Štarha} and Daniel {Koutný},
title="Multi-view camera system for measurement of heavy forgings",
year="2022",
volume="121",
number="11-12",
month="July",
pages="7295--7310",
publisher="SPRINGER LONDON LTD",
address="LONDON",
issn="0268-3768"
}