Three-dimensional scanners, in some areas, such as Guangdong and Guangxi, some people called the number machine. Copying the number, simple understanding is to copy the data, the main purpose is to collect three-dimensional data of the object, and then use the three-dimensional data for reverse engineering (reverse modeling, reverse design), secondary creation, product design, three-dimensional inspection (quality inspection field ), currently mainly used in these areas.

There are many applications in the industry, such as cars, molds, jewelry, wood carvings (such as Pingxiang where mahogany furniture, there is a hand-held 3D scanner to scan mahogany furniture, and then the furniture, wood carving 3D data combined with CNC engraving machine Direct processing, which can be completed in a few hours), is also used in sculpture, cultural relics, mechanical parts, aircraft, automotive interiors and other fields.

At present, the well-known domestic one is Hualang three-dimensional scanner, which not only has a camera-type 3D scanner, but also a handheld 3D scanner, a color 3D scanner, and a 3D photogrammetry system.

Handheld 3D Scanner - Reverse Engineering Application:
Reverse engineering (also known as reverse engineering) is the reconstruction of existing physical models (or part prototypes) using various digital techniques and CAD techniques in the absence of complete design drawings or even design drawings or CAD models. The process of the original CAD model.
When the early designers used the product design, the method used was mainly the forward design method; this is a process from conceptual design to CAD modeling, numerical control programming, and numerical control machining. The forward design flow of product design is indicated. : Concept Design → CAD/CAM System → Manufacturing System → New Product.

However, for complex products, the forward design method also shows his shortcomings. The design process has large difficulty coefficient, long cycle and high cost, which is not conducive to product development. If there is a way to correct the local problems generated in the forward design process, it is naturally the best of both worlds. It is in this context that it naturally develops and forms a reverse design method.

The process of 3D scanning reverse design:
Product samples → Handheld 3D scanner data acquisition → Data processing CAD/CAE/CAM system → Model reconstruction → Manufacturing system → New product.

Therefore, in the large market demand, more and more enterprises are involved in reverse engineering, and handheld 3D scanners are reverse engineering tools.
How to apply a 3D scanner to reverse engineering - take Hualang 3D scanner as an example.
Accurate and high-speed 3D scanning of existing samples or models, obtaining 3D point cloud data, performing surface reconstruction with reverse software (such as Rapidform, Imageware, etc.), and performing online precision analysis and evaluation on reconstructed surfaces. The construction effect, the final generation of IGES or STL data, can be CNC machining or rapid prototyping, providing a new and efficient three-dimensional manufacturing route for the manufacturing industry.