Flatness and Thickness Measurements of Circular Plate Component Using Laser Distance Meter

Abstract

In this paper, we propose an innovative method for measuring the thickness, flatness, and Abbe angle of a disc. This innovative method includes three laser distance meters and one standard plate. In general, the three laser distance meters are used to determine the thickness and flatness of a disc. The Abbe angle is determined using the laser distance meter and reference plate. Our analytical results show that the proposed method can be used to obtain the precise thickness and flatness of a disc. The resolution of the measurement method is 1 μm. The flatness is measured by the least squares method. The front and back laser distance meters simultaneously measure the warp and wrinkle. The maximum deviation of the measured thickness of a disc is reduced by using two laser distance meters to determine the effects of warp and wrinkle. The thickness, flatness, warp, and wrinkle of a disc are measured quickly and conveniently.

High-efficiency flatness detection method for medium-thick steel plates based on multiline parallel laser vision

“…In the early stages of development in the steel industry, the flatness of the medium-thick steel plates was mainly judged manually to determine the plate quality, but efficiency, accuracy, and stability were low 6 . From the perspective of current flatness detection methods, there are mainly two types: contact and noncontact 7 , 8 .…”

“…[3][4][5] In the early stages of development in the steel industry, the flatness of the medium-thick steel plates was mainly judged manually to determine the plate quality, but efficiency, accuracy, and stability were low. 6 From the perspective of current flatness detection methods, there are mainly two types: contact and noncontact. 7,8 Contact types from the early development of three-coordinate inspection to capacitive or inductive-based new probe detection had high accuracy, but were expensive and easily caused surface scratches and wear, largely limiting the development and application of contact detection.…”