3D scanning technology plays a vital role in modern science and technology. It has also developed rapidly in recent years. There are three main technologies: laser scanning, pattern light modeling, and graphics processing, and the three technologies have their own advantages and disadvantages. , which complement each other. Then, there must be many partners who are not very clear about the working principle and functions of 3D body scanners. Let us introduce them in detail.
1. The principle and function of 3D body scanner
The 3D human body scanner adopts white light fast projection technology to scan the human body from multiple angles within 0.1s. The system automatically stitches together to obtain complete human body 3D data with color textures. The 3D data accuracy can reach 0.5mm, and it has full color. Real texture.
The scanned data can be saved in ply, obj and other standard formats and seamlessly connected with 3D printers, which can be used in film and television animation, medical plastic surgery, 3D virtual fitting, forensic identification, national defense and other fields.
In addition, 3D scanning technology is mainly based on non-contact laser, photography, white light, etc. It can have high measurement accuracy and is suitable for relative size measurement and quality management. The optical scanning speed is fast, the accuracy is appropriate, and it can Scan the three-dimensional objects to obtain a large amount of point cloud data to facilitate the reconstruction of the curved surface. After scanning, the data is read out on the computer. Usually this part is called reverse engineering preprocessing.
After obtaining the data of the product, use the reverse engineering software to process the point data, and then reconstruct the surface model and generate CAD data after classifying, grouping, and comparing the point, line, surface and solid errors, and then RP Part can be produced. To confirm the mechanism and geometry, or NC machining and mold making, these are part of the post-processing.
2. The technical development of 3D body scanners
Since the emergence of 3D scanning technology, many scanning principles have been developed so far. From the perspective of 3D data acquisition methods, non-contact methods are the most widely used in reverse engineering due to their speed and accuracy. According to the different light sources, the triangle method can be divided into two different methods: point light source and line light source. The data organization method obtained by different methods is different.
The continuous scanning measurement method based on the contact type has also been partially applied due to its relatively high accuracy, but it is worse than the non-contact type in terms of speed and price.
In the fields of ergonomics, virtual reality, and clothing CAD, digital 3D scanners have the dominant advantage in similar models. It digitizes the human body structure, and automatically realizes point cloud data stitching by taking multi-angle instant shots of the human body. , which automatically generates digital images and point cloud data.
With the further development of research and development, various new 3D scanner technologies will continue to emerge and be applied to commercial systems, and the existing 3D scanner technologies will be continuously improved to meet the needs of manufacturing production.
The above is an introduction to the principle and function of the 3D body scanner. I hope the above introduction can bring some help to everyone's life.