单条纹截面轮廓传感器的设计与标定

Design and calibration of single stria section contour sensor

为实现单条纹截面轮廓传感器的设计与标定,建立了单条纹截面轮廓传感器测量物体表面点空间坐标的数学模型,基于此模型分析了单条纹截面轮廓传感器的测量误差,得出了传感器各结构参数与测量误差之间的关系。在综合分析各结构参数对测量误差的影响的基础上,得出了传感器结构参数设计的依据,并给出了结构参数设计及标定的实例。最后,通过实验的方法对传感器的测量精度进行了验证。实验结果表明:深度测量相对误差<0.3%,重构的复杂表面具有良好的视觉效果。

In order to optimize the design and calibration of the structural parameters of single stria section contour sensor, a mathematic model that the single stria section contour sensor measures the coordinates of the spatial points is established. The measurement errors of the single stria section contour sensor are analyzed based on the mathematic model and the relationship between the structural parameters of the sensor and the measurement errors is obtained. Based on the comprehensive consideration of the effect of the structural parameters on the measurement accuracy, the criterion for designing the structural parameters of the sensor is given. A practical example of the design and calibrat of the structural parameters is introduced to demonstrate its implementation, and the measurement accuracy of the sensor is proved by an experiment. The results indicate that relative depth measurem error of real system is less than 0. 3%, and the complex surface reconstructed by real system ha good visual effect.