Machine vision equipment is a crucial component of the automation industry. In industrial production automation, machine vision is used to measure and inspect various dimensional parameters, such as length, arc, angle, electrical measurements, area, and more. It can not only measure product dimensions in real time but also evaluate and classify product appearance, detect defects, making it widely applied in numerous scenarios.

Principle of machine vision appearance defect detection:
Various defects and imperfections on the product surface will inevitably have different optical properties from the product itself. When light shines on the product surface, various defects and imperfections will be reflected and refracted by the surrounding environment, resulting in different appearances. For example, when uniform light is incident perpendicularly onto the product surface, if there are no defects on the surface, the emission direction will not change and the detected light will be uniform. When there are defects on the product surface, the emitted light will change and the detected image will also change accordingly.

Due to the presence of defects, stress concentration and deformation occur around the defects, which can be easily observed in the image. If there are transparent defects (such as cracks, bubbles, etc.), light will be refracted at the defect site, and the intensity of the light will be greater than that of the surrounding area. Therefore, the light detected on the camera target surface will be enhanced accordingly. Absorbing impurities, such as sand grains, weaken the light at the defect site, and the camera target surface where the detected light is less than that of the surrounding area. By analyzing the intensity and characteristics of the image signals collected by the camera, corresponding defect information can be obtained.

Visual system inspection equipment can replace traditional manual inspection, enabling online, high-speed and automatic inspection of product appearance and automatic identification of surface defects of the products. It has high efficiency, high precision, low cost, and simple operation. Coupled with a powerful visualization software, it is easy to adjust, flexible, convenient, and can store measurement data. This is convenient for establishing statistical analysis, facilitating quick identification of problems and solutions. Industrial inspection technology is the best choice.