DEVELOPMENT OF THE COMPACT DIGITIZING UNIT FOR DENTAL CAD/CAM SYSTEM AVAILABLE FOR NETWORK DENTISTRY

最初，我们的目标是开发系统使用分离的测量系统和加工系统在牙科CAD/CAM系统。研究了网络数据系统，特别是传统激光数字化仪与工业加工机床之间的数据量和传输时间的关系。该系统的实测数据量为1.2MB，对于网络传输来说太过无用。在将这些三维点数据重建为样条曲面数据后，我们可以将数据大小减少到平均349.9 KB。虽然PHS手持电话系统被采用，因为在安装中几乎没有限制，但在数字化后在计算机屏幕上进行检查大约需要5分钟。因此，我们随后开发了一个快速和紧凑的数字化系统。我们以前开发的系统使用点激光位移计。该测量系统必须收集模具表面上的每个点，即使可以执行因此的高精度测量。因此，我们开发了一个试验产品的紧凑型数字化仪使用CCD相机和线激光器。因此，我们可以将测量时间减少到3分钟以内，并且可以实际测量整个研究模型。由于在优化过程中，部分由三维点数据转化而来的曲面数据变得模糊不清，我们将继续改进优化过程的算法。

Initially we aimed to develop the system using the separation of a measurement system and a machining system in dental CAD/CAM system. The network data system, especially the data size and the transaction of transmitting time between a conventional laser digitizer and an industrial machining machine was examined. The measured data size of this system was 1.2MB, which had too much futility for network transmission. After these 3 dimensional point data was reconstructed to Spline surface data, we could reduce the data size to an average of 349.9 KB. Although the PHS handy phone system was adopted because of little restriction in an installation, it took about 5 minutes to perform the check on a computer screen after digitizing. We therefore, subsequently developed a speedy and compact digitizing system. We previously developed the system using a point laser displacement meter. This measurement system had to collect every point on the die surface even if the consequently highly precise measurement can be performed. We therefore developed a trial product of compact digitizer using a CCD camera and line laser. As a result, we could reduce the measuring time to fewer 3 minutes, and furthermore whole study model could be measured practically. Since some part of the transformed surface data from 3 dimensional point data were indistinct by the process of the optimization, we will continue to improve the algorithm of this optimization process.