基于电子光栅拍频原理的莫尔等高线测量术

Moire Isohypse Surveying Based on Electronic Grating Beat Frequency Principle

本文报导用电子振荡信号形成“参考光栅”,基于电信号拍频原理产生等高线条纹的光电结合型莫尔轮廓术。用相位法对椭圆柱面样品进行逐点扫描测量,测得相邻等高线高差△z≈4.5mm,测量精度为±1mm。用1/25秒采样速率对缓慢运动的人手进行了实时三维形状测量。这种技术适合用于复杂曲面的非接触三维测量,或用于机器人视觉传感器。

Reference grating formed by electronic oscillating signal and photoelectric conjunction Moire contouring of isohypse fringe based on electronic signal beat freguency principle are reported in the paper. Through point-by-point scanning measurement for elliptic cylinder by phase method, the height difference between neighbouring isohypses is: △z≈4.5mm, and measuring accuracy is±1mm. The real time measurement of 3-dimension shape of a slow moving man's hand is carried out with sampling rate of 1/25 second. The techno- logy is applicable to the non-contact 3-dimension measurement of the complex curved surfaces or the vision sensor of robots.