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目的 研制开发具有三轴运动结构的牙颌模型三维激光扫描测量分析系统。方法运用三个步进电机构成牙颌模型双轴旋转与单向平移的运动,应用点状光束与线阵列摄像机(CCD)构成非接触式高精度纵向位移检测器获取牙颌模型的三维数据,在windows环境下完成牙颌模型的三维重建、测量。结果 系统的扫描精度为0.01 mm,平均测量误差<0.1 mm。采用定制标定块进行了标定实验。用本系统与机械法对20副正常模型进行了测量比较,两者之间差异无显著性(P>0.05)。结论 该系统具有测量精确,高效和没有盲区的优点。
Objective To develop a three-dimensional laser scanning measurement and analysis system with three-axis motion structure. Methods The three-step motor was used to construct the biaxial and one-way translation movements of the dental model. The non-contact high-precision longitudinal displacement detector was constructed by the point beam and line array camera (CCD) to obtain the three-dimensional data of the dental model. In the windows environment to complete the three-dimensional reconstruction of dental model, measurement. Results The system has a scanning accuracy of 0.01 mm and an average measurement error of <0.1 mm. Custom calibration blocks were used for calibration experiments. There were no significant differences between the two normal models (P> 0.05) by the system and mechanical method. Conclusion The system has the advantages of accurate measurement, high efficiency and no blind spot.