Machine vision detection device and method based on line scanning camera

Abstract

The invention provides a machine vision detection device and method based on a line scanning camera. The machine vision detection device comprises a driving roller, a first encoder and the line scanning camera, wherein the first encoder is mounted on the driving roller which rotates to drive the first encoder to generate a first encoder pulse signal; the resolution of the first encoder is K1; the encoder resolution needed to trigger the line scanning camera to capture mages is K; when the first encoder pulse signal does not meet a requirement of the resolution needed to trigger the line scanning camera to capture images, the detection device further comprises a servo motor and a second encoder; the resolution of the second encoder is K2, wherein the second encoder is mounted on the servo motor; the first encoder pulse signal triggers the servo motor to rotate; a servo motor controller enables the rotation speed ratio of the servo motor and the driving roller to be alpha, wherein alpha is equal to K1*K2 / K; and the servo motor rotates to drive the second encoder to generate a second encoder pulse signal. Compared with the prior art, the machine vision detection device provided by the invention can meet the resolution requirement for triggering the line scanning camera to capture images by using existing ordinary encoders on the market, and has advantages of simple structure and low cost.

Description

technical field [0001] The invention relates to the field of machine vision detection, in particular to a line scan camera-based machine vision detection device and method. Background technique [0002] In practical industrial applications, a machine vision detection device with a line scan camera installed on a printing machine as an electronic eye is usually used to detect the printing quality of printed matter on-line. The typical structure of the machine vision inspection device is that the shooting position of the line scan camera is set on the generatrix of the roller, and the encoder is installed on the driving roller. According to the resolution requirements of the image collected by the line scan camera, it is necessary to select an encoder with the corresponding resolution according to the diameter of the roller to trigger the line scan camera to take pictures of the printed matter to be detected, but sometimes the diameter of the active roller is not our ideal dia...

AI Technical Summary

Problems solved by technology

According to the resolution requirements of the image collected by the line scan camera, it is necessary to select an encoder with the corresponding resolution according to the diameter of the roller to trigger the line scan camera to take pictures of the printed matter to be detected, but sometimes the diameter of the active roller is not our ideal diameter, so For direct installation, an encoder with a very special resolution (such as a very high resolution requirement) is required, which cannot be found directly in the market, or even if it can be found, it will require a higher cost

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