A monocular vision size measurement method based on a linear motion module

Abstract

According to the monocular vision size measurement method based on the linear motion module, 3D outline restoration and size measurement of the workpiece are achieved through cooperation of the linearmotion module and the image acquisition system, and the cost is remarkably reduced while the measurement efficiency is guaranteed. The monocular camera is arranged right above the linear motion module, two images of a workpiece at corresponding positions are shot at two points of different positions in the linear advancing direction of the linear motion module within the coverage range of a selected lens surface area of the monocular camera respectively, and then the three-dimensional size of the workpiece is reconstructed through an external processor part according to the two images.

Description

technical field [0001] The invention relates to the technical field of three-dimensional measurement, in particular to a dimension measurement method based on monocular vision of a linear motion module. Background technique [0002] The 3D dimension measurement of workpieces is an important application of machine vision in the industrial field. The equipment currently used is mainly wired laser measurement sensors, structured light measurement sensors and binocular vision sensors. [0003] Among them, each image of the line laser sensor can only obtain a single cross-sectional contour line of the workpiece. For the workpiece on the fast assembly line, it is difficult to achieve high-precision measurement resolution and measurement speed in the direction of workpiece movement; the structured light measurement sensor The calibration process is complicated, and the measurement process requires the workpiece to be stationary, which is not suitable for the measurement of assembly...

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Problems solved by technology

[0003] Among them, each image of the line laser sensor can only obtain a single cross-sectional contour line of the workpiece. For the workpiece on the fast assembly line, it is difficult to achieve high-precision measurement resolution and measurement speed in the direction of workpiece movement; the structured light measurement sensor The calibration process is complicated, and the measurement process requires the workpiece to be stationary, which is not suitable for the measurement of assembly line workpieces, so it is generally used for the measurement of stationary workpieces; the binocular vision sensor can obtain the 3D outline of the entire workpiece with one imaging, which is suitable for high-speed assembly lines. Workpiece 3D dimension measurement, but its equipment cost is high

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