Mold Measurement Methodology - Handheld 3D Scanner
2019-06-01
Handheld 3D scanner application and mold profile surface measurement. The optical three-dimensional scanner is a technical means to achieve contrast with the real object by acquiring the curved surface data of the mold shape. By comparing and detecting the irregularity of the object, the surface measuring method is divided into contact type and non-contact type, and most of the contact type measurement. The use of three-coordinate measuring instrument, its measurement accuracy is high, but the efficiency is very low, non-contact measuring equipment is mainly based on the three-dimensional digital imaging principle of optical three-dimensional scanner, such as structural light measurement, modeling of the triangular face measurement method.
The measurement accuracy of handheld 3D scanners is the key to obtaining high quality freeform surfaces. Therefore, how to effectively evaluate the measurement capabilities of 3D scanners is very important. Non-contact measuring equipment is mainly based on optical methods of three-dimensional digital imaging technology, such as laser triangulation, structured light projection method, Germany has developed the accuracy test standard for non-contact three-dimensional measurement, and was drafted by the German Society of Engineers in 2002. The VDI/VDE 2634-2 optical measurement system inspection standard was released; this standard describes the detection method for evaluating the accuracy of the point-by-point optical 3D measurement imaging system and the accuracy of the surface scan-based optical 3D measurement imaging system. Detection method. In this standard, the evaluation of the plane measurement error is performed in seven different directions of the space using a rectangular parallelepiped having a diffuse reflection surface. A method for confirming the measurement accuracy of a three-dimensional vision sensor using a coordinate measuring machine is presented. The National Institute of Metrology (NPL) has developed a true free-form surface standard.
Due to its high modeling efficiency and economical price, 3D scanning products are gradually welcomed by domestic enterprises, especially small and medium-sized industrial enterprises. China is becoming a global manufacturing center, and there are a large number of small and medium-sized industrial enterprises. Therefore, the future market for 3D scanning products is very broad.
