Machine vision light source luminance real-time regulating method and special system thereof in quality detection

Abstract

The invention discloses a machine vision light source luminance real-time regulating method in quality detection, which comprises the steps of: acquiring an image of an object to be detected, transmitting the image to a computer, analyzing an RGB (Red Green Blue) value of a shot picture by using an image processing module in the computer to obtain a luminance value of a current light source, and when the luminance of the light source changes, sending a command to a constant-current controller by the computer, compensating a working current of the light source by the constant-current controller according to the command of the computer to ensure that the luminance of the light source is kept constant. The invention also discloses a special system of the method, which comprises a light source device, an intelligent constant-current controller connected with the light source device and used for providing electricity to the light source device, the image acquisition device arranged above the light source and a computer connected with the image acquisition device and the intelligent constant-current controller. The machine vision light source luminance real-time regulating method and the special device thereof have the characteristic of ensuring that the luminance of the light source is kept constant in a working process by adopting the constant-current regulation.

Description

technical field [0001] The invention relates to the technical field of electronic product quality detection, in particular to a machine vision in quality detection [0002] A light source brightness control method and a dedicated system thereof. Background technique [0003] In industrial production, intelligent quality inspection has been widely used around the world, and the machine vision light source is the core component of the inspection system. The light source is connected to a controller. Most light sources control their voltage and current by adjusting the potentiometer (variable resistor) through the controller; by adjusting the resistance value of the variable resistor, the working voltage and current of the light source are changed, thereby The brightness of the light source can be controlled; but the above control methods cannot be controlled in real time. When the brightness of the light source changes, the voltage and current provided by the controller ...

AI Technical Summary

Problems solved by technology

The light source is connected with a controller, and most light sources control their voltage and current through the controller to adjust the potentiometer (variable resistor); the working voltage and current of the light source can be changed by adjusting the resistance value of the variable resistor, thereby The brightness of the light source can be controlled; however, the above control methods cannot be controlled in real time. When the brightness of the light source changes, the voltage and current provided by the controller will not automatically compensate, and the brightness of the light source cannot be kept constant.

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