Current status of surface measurement software
The detection of curved workpieces based on 3D digital model is an advanced application category in the measurement of three coordinate machines, which is generally included in high-end measurement software. At present, the CAD++ version of PC-DMIS, VIRTUL DMIS, etc., which are common in the domestic market, are developed by professional measuring machine software companies such as WILCOX and ENTELEGENCE. POWER INSPECT software is also cited in the coordinate machine because of its strong function in digital-analog processing. It is provided by British CAD/CAM software company DELCAM, which also shows that the measuring machine software is more and more closely integrated with CAD software. the trend of.
In fact, for surface quality evaluation, as part of surface construction, editing, and analysis, CAD software manufacturers have a better solution earlier, especially in reverse engineering processing software, after processing the collected point cloud into a surface. It is often necessary to compare the deviation of the point cloud and the design curve and the surface to improve the surface quality while ensuring accuracy. Figure 4 is a comparative analysis of point clouds and surfaces in imageware, and the results are expressed in different color gradients.
Development of ZCRMDT measurement software
Domestic research and development of measurement software is relatively lagging. For advanced functions such as digital-analog detection, foreign software is generally supported. ZCRMDT manual version measurement software from the Institute of Measuring Instruments of China Institute of Testing Technology (medium measuring instrument), complete 3D graphical measurement environment, support for digital analog import, dynamic simulation of probe track, visual measurement, view rotation, zoom, graphics Selecting and realizing the function of detecting using the surface digital model, it is worth mentioning that the function of the CAD platform can also be used to edit the digital model. Figure 5 shows the use of ZCRMDT software to detect a curved surface inspection tool. The software compares the measurement points on the workpiece directly with the digital model to obtain the deviation. The inspection personnel adjust the point according to the result until the deviation is within the allowable range.
From the technical level, ZCRMDT software, as a manual version of the measurement software, has reached or is close to the level of similar foreign software, and is in an advanced position in the country. At the same time, compared with foreign software, it has obvious price advantage. At present, ZCRMDT software has been installed on the manual measuring machine produced by the measuring instrument. It has been adopted by dozens of users all over the country, enabling customers to realize advanced measurement functions without spending too much money and solve the measurement problems of customers.
Conclusion
The three-dimensional surface detection technology based on 3D digital model belongs to a comprehensive and advanced advanced measurement technology, which involves CAD, coordinate measuring machine, software programming and measurement, etc. It is not a simple article. In the author's work, I have a little experience in testing and developing related software, and I would like to discuss it with you. With the development of three-coordinate measurement technology, the three-coordinate measurement software will certainly make more progress.
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