On reverse technology development <br> <br> on reverse technique also known as reverse engineering (reverse engineering), originally this technique is used for three-dimensional measurement and quality checks. The produced product can be used to measure its dimensions and verify its quality, and then compare the parameters of the original design, whether it meets the requirements or needs to be modified or optimized. It can be said that the three-dimensional reverse technology is a way for the downstream process in the product design process to feed back information to the upstream process. Next page Led Garden Lights,Best Solar Garden Lights,Solar Garden Lanterns,Solar Outdoor Christmas Light Jiangmen Biaosheng Solar Energy Technology Co., Ltd. , https://www.bsprosolar.com
In the 1960s, some scholars proposed the possibility of using computer vision to acquire three-dimensional data. Subsequently, a variety of techniques were developed to acquire three-dimensional data, including stereo vision, structured light, and the like. These technologies have not been commercialized because the time-consuming image acquisition instruments, electronic components, software technology, and computer computing functions are all difficult to meet technical requirements. Especially in the computer computing function, the computer at that time could not handle huge data.
In the 1980s, Cyberware developed a 3D scanner for scanning human heads and successfully used it for film and television special effects production. After that, the US and Japanese companies have invested huge human and material resources to develop related technologies and scanning instruments. The technical aspects include image radar, focus ranging, and moiré, and there are nearly a hundred scanning instruments.
Three-dimensional reverse technology principle and workflow
Three-dimensional reverse technology includes three aspects: image reversal, software reverse and physical reversal. At present, the most researched person is the physical reverse technology. It is the study of the reconstruction of physical CAD models and the manufacture of final products. In Shaanxi, the three-dimensional reverse technology is to transform the physical model into a design and conceptual model, and on the basis of this, the product is analyzed, modified and optimized.
<br> <br> works on reverse technique is to use electronic devices to collect raw data of the object surface, then again using software to calculate the spatial coordinates of the acquired data, and obtain the corresponding color. The scanner scans the object in all directions, then organizes the data, three-dimensional modeling, format conversion, and output. The whole process can be divided into four steps:
(1) Object data: The coordinate coordinate value of the surface of the object is generally collected by a coordinate measuring machine or a laser scanner.
(2) Analyze the geometric features of the object from the collected data: according to the attributes of the data, segmentation, geometric features and recognition methods are used to analyze the design and processing characteristics of the object.
(3) 3D model reconstruction of objects: Using CAD software, the segmented 3D data is fitted to the surface model to obtain a 3D model of the object.
(4) Test and correct the 3D model.
Typical Workflow workflow <br> <br> mainly on reverse existing physical instrument, use of the data, accurately and quickly acquired surface coordinate value of the spatial profile, then build surface, generated by the CAM software CNC Machining the tool path, manufacturing the physical model on a CNC machine or using a rapid prototyping machine to make a physical prototype. In terms of product design, the collected spatial coordinate values ​​can be modified or re-innovated on the solid 3D model. The rapid prototyping machine can read documents in STL format, which can be converted directly from cloud points or converted in built surface and solid 3D models.
3D data acquisition method
The three-dimensional data collection method, according to the principle they use, there are three ways: one is contact type, such as three-coordinate measurement; the second is non-contact, such as structured light method, laser triangulation, etc.; the third is layer-by-layer scanning method, such as CT method, nuclear magnetic resonance method, automatic tomography method, and the like.
Which acquisition method is used depends on the shape, size, substance, and data application purpose of the object to be scanned. There are many types of scanning instruments in the market. Although the collection methods are not the same, they are mainly composed of three parts; namely, scanning devices, sensors and software.