基于动态梯度的激光光斑中心定位算法

Location Algorithm of the Laser Spot Center Based on Dynamic Gradient

为提高激光光斑中心检测的长期稳定性、抗干扰性能和定位精度,在对相关圆心定位算法进行研究的基础上,通过理论分析与实验测试,提出一种基于动态梯度的激光光斑中心定位算法。该算法根据激光光斑特点,利用图像梯度对光斑进行标识与定位。实验结果表明,该算法定位精度高,有效提高了激光光斑中心检测的抗干扰性能和长期稳定性,适合对测量精度要求高的长期在线测量。这种新方法已被成功用于自动激光挠度测量系统中。

To improve the long-term stability, anti-interference performance and location precision of the laser spot center detection, a dynamic gradient based location algorithm of laser spot center is given after theoretical analysis and experiment based on researching of some location algorithms of the centre of a circle. According to the character of the laser spot, the algorithm identifies and locates the spot by using gradient. Experiment results demonstrate the high precision of the algorithm, and the long-term stability and anti-interference performance of the detection of the laser spot center are improved efficiently. It is suitable for long-term online measurement. The new algorithm has been used in a laser deflection measurement system successfully.