Today's appearance defect detection equipment is the original more types, machine vision is also more and more automation enterprises want to move towards machine vision and its function is more and more powerful, machine vision detection equipment using the optical principle, through visual software analysis and detection of product appearance size, defects, defects, burrs. The purpose is to replace manual quality inspection, improve detection efficiency and reduce production cost. AI vision has become a household name. It has the advantages of deep learning, strong anti-interference ability, high accuracy, self-upgrading algorithm and so on, and the recognition rate can reach 99.99%. This is because of the development of industrialization, a variety of imaging equipment has been developed, at this time, a machine is needed to detect the optical performance of the imaging machine. Then how to choose the appearance of defect detection machine, the following Xiaobian to introduce to you.
Appearance defect detection machine on the market is mainly carried out in the way of detection, we should pay attention to the following when selecting:
Detection speed: speed determines capacity, appearance defect detection machine price, if you want to use the machine to replace a large number of human detection, speed must be the primary consideration.
Detection accuracy: Most people think that to improve the accuracy, you must improve the camera configuration. In fact, the accuracy is also affected by the lighting and lens.
Sharing: All kinds of parts and hardware products processing styles hundreds of kinds, size is more.
After-sales service and optical software: In addition to the usual customer service problems, more attention should be paid to hardware maintenance and software update ability. Especially on the software with high technical threshold, this problem is particularly prone to occur.
Test items: The basic size measurement of the machines sold in the market will not have much problem.
Integrity: In addition to the optical requirements of the defect detection machine, the structure of the mechanism design is also very important.
Optical screening machine features:
1, efficiency: 400-1200pcs/min (product and test content is different, the efficiency will be different)
2, detection accuracy: up to 0.003mm
3, accuracy: 99.9%
4, detection content: appearance size, defects, scratches, burrs, etc
The detection principle of CCD optical appearance detection equipment
CDD optical detection detects all kinds of defects on the surface of the product, which must be different from the product itself in optical characteristics. When the light incident on the surface of the product, various defects will show different characteristics in reflection, refraction and other aspects. For example, when uniform light is perpendicular to the product surface, if there is no defect on the product surface, the direction of emission will not change, and the detected light is uniform. When the surface of a product contains a defect, the light emitted changes, and the image detected changes accordingly.
Due to the existence of defects, stress concentration and deformation occur around them, which are easy to observe in the image. In case of light transmission defects (such as cracks, bubbles, etc.), the light will be refracted at the position of the defect, and the intensity of the light is larger than the surrounding light, so the light detected on the target surface of the camera will be enhanced accordingly. If light absorbing impurities (such as sand, etc.) are encountered, the light at the defect location will become weak, and the light detected on the camera target surface will be weaker than the surrounding light. The corresponding defect information can be obtained by analyzing the strong and weak changes and image characteristics of the image signal collected by the camera.
The manufacturing industry wants to improve the quality of products, the application core of automatic optical appearance and size detection equipment is to replace manual detection, improve efficiency and other problems to make great improvements.