Three-dimensional measurement of three-dimensional measurement method

1) By placing the object to be measured in the coordinate measuring space, the coordinate positions of the measuring points on the object to be measured can be obtained, and this technique is the principle of the coordinate measuring machine. CMM is one of the most effective methods of measuring and obtaining dimensional data, can replace a variety of surface measurement tools, reduce the time required for complex measurement tasks, and provide operators with useful information about the status of the production process.

2) A 3D laser scanner is used to scan the object being measured by emitting a laser to obtain the 3D coordinates of the surface of the object being measured. 3D laser scanning technology is also known as real-life reproduction technology, which has the advantage of high efficiency and high precision measurement. It has been said that 3D laser scanning is another technological revolution in the field of surveying and mapping since GPS technology. Three-dimensional laser scanner is widely used in structural surveying, building surveying, shipbuilding, railroads, and construction of the project and other fields, in recent years, three-dimensional laser scanner has been developed from the fixed towards the mobile direction, the most representative is the vehicle-mounted three-dimensional laser scanner and airborne three-dimensional LiDAR.

3) Photographic three-dimensional scanner using a combination of structured light technology, phase measurement technology, computer vision technology, composite three-dimensional non-contact measurement technology. This measurement principle makes it possible to take a photo measurement of an object. The so-called photogrammetry, is similar to the camera on the field of view of the object to take a picture, the difference is that the camera ingests a two-dimensional image of the object, and the development of the measuring instrument to obtain the object's three-dimensional information.