介绍了彩色面结构光栅投影轮廓术的基本原理,该原理在投影光栅方面采用正弦编码的投影光栅,这样可以采用快速的直接光栅条纹解调的方法,实现了对被测物体单视角数据的测量,并对标准台阶进行了测量。分析了测量过程中存在的误差及其产生的原因;并针对各种误差提出了相应的改进或克服方法;最后,使用该方法对具有复杂自由曲面的脚型进行了测量,实验结果表明:该方法能够快速、准确地获取被测物体的三维数据。

The principles of profilometry with color face-structured projecting grating was introduced in this paper. The sine coded projecting grating was adopted,so that the rapid direct demodulation of grating fringe method could be used to carry out the measurement of single view angle of the object,and a standard step was measured by the method. The reason that caused errors in the measuring process was analyzed,and the corresponding improving method was put forward. Finally,the foot of complex free-form surface was measured by the method,and the results show that the method can obtain the 3D data of the object quickly and accurately.