一种提升反向条纹测量精度的方法

发布时间：2018-06-02 05:47

本文选题：测量 + 反向条纹投影　；参考：《激光与光电子学进展》2016年11期

【摘要】：为了提升反向条纹测量系统的精度,提出了利用三频时间相位补偿算法来改善投影机-相机测量系统非线性误差的测量方法。在测试物体上投影两套具有特定相位偏移的结构光条纹,基于三频时间相位展开方法获得展开相位。具有特定相位偏移的两套条纹测量得到的系统非线性相位误差具有大小相等、符号相反的特性,因此可以通过简单的算术计算来消除或减弱系统的非线性影响,从而提升测量精度。设计了模拟仿真和实物对比实验对所提方法进行验证,实验得到的相位标准差分别为6.6122×10-4 rad和0.0087rad。实验结果表明,所提方法使反向条纹测量的精度有了大幅改进,验证了该方法的有效性。
[Abstract]:In order to improve the accuracy of the reverse fringe measurement system, a method of improving the nonlinear error of projector-camera measurement system by using three-frequency time phase compensation algorithm is proposed. Two sets of structured light stripes with specific phase offset are projected on the measured object. The unfolded phase is obtained based on the three-frequency time phase unwrapping method. Two sets of fringes with specific phase offset have the characteristics that the nonlinear phase error of the system is equal and the sign is opposite, so the nonlinear effect of the system can be eliminated or weakened by simple arithmetic calculation. Thus, the measurement accuracy is improved. Simulation and physical contrast experiments were designed to verify the proposed method. The phase standard deviations were 6.6122 脳 10 ~ (-4) rad and 0.0087 rad. respectively. The experimental results show that the proposed method greatly improves the accuracy of the reverse fringe measurement and verifies the effectiveness of the proposed method.
【作者单位】：成都信息工程大学光电技术学院;
【基金】：国家重大科学仪器设备开发专项(2013YQ49087905) 成都信息工程大学科研基金(KYTZ201516) 大学生创新创业训练计划资金(CX2015033,201610621056)
【分类号】：TP391.41

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