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双频外差结合相位编码的相位解包裹方法

Phase unwrapping method based on dual-frequency heterodyne combined with phase encoding

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摘要

为了使用高频条纹进行一次外差完成相位解包裹,实现高精度测量,提出了双频外差结合相位编码的相位解包裹方法。首先,用两组正弦条纹获得两个包裹相位,进行外差处理得到外差相位;其次,相位编码条纹得到条纹级次后对外差相位展开;最后,由连续的外差相位对两个包裹相位进行展开,用最高频率的连续相位求得物体的相位信息。实验结果表明:RMS误差为0.038 mm。双频外差合成的周期不需要覆盖整个视场,打破了传统双频外差方法对频率选择的限制,可以用更高频率的条纹进行高精度测量。克服了相位主值误差对使用更高频率条纹进行高精度测量的局限性。

Abstract

In order to complete phase unwrapping with a heterodyne of high frequency fringe and achieve high accuracy measurement, a phase unwrapping method of dual frequency heterodyne combined with phase coding was proposed. Firstly, two wrapping phases were obtained by two sinusoidal stripes, and one heterodyne phase was obtained by heterodyne processing; Secondly, the phase coding fringe was used to obtain the fringe order, and the heterodyne phase was unwrapped by fringe order; Finally, the two wrapping phases were unwrapped by continuous heterodyne phases, and the phase information of the object was obtained by using the continuous phase of the highest frequency. The experimental results show that the RMS error of the measurement is 0.038 mm. The period of dual-frequency heterodyne synthesis did not need to cover the whole field of view, thus breaking the limitation of frequency selection in traditional dual-frequency heterodyne method, which could be used for high accuracy measurement with higher frequency fringes. High frequency fringe can be used for high accuracy measurement even if there is error of phase principal value.

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中图分类号:TN29;TP274

DOI:10.3788/irla201948.0913003

所属栏目:光电测量

基金项目:国家自然科学基金(61661034,11864026);江西省重点研发计划(20171BBE50012);江西省教育厅科技计划(DA201808191)

收稿日期:2019-04-05

修改稿日期:2019-05-15

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韩 旭:南昌航空大学 无损检测技术教育部重点实验室,江西 南昌 330063南昌航空大学 测试与光电工程学院,江西 南昌 330063
王 霖:南昌航空大学 无损检测技术教育部重点实验室,江西 南昌 330063南昌航空大学 测试与光电工程学院,江西 南昌 330063
伏燕军:南昌航空大学 无损检测技术教育部重点实验室,江西 南昌 330063南昌航空大学 测试与光电工程学院,江西 南昌 330063

联系人作者:韩旭(csmk_hx@163.com)

备注:韩旭(1992-),男,硕士生,主要从事三维测量方面的研究。

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引用该论文

Han Xu,Wang Lin,Fu Yanjun. Phase unwrapping method based on dual-frequency heterodyne combined with phase encoding[J]. Infrared and Laser Engineering, 2019, 48(9): 0913003

韩 旭,王 霖,伏燕军. 双频外差结合相位编码的相位解包裹方法[J]. 红外与激光工程, 2019, 48(9): 0913003

被引情况

【1】王玉伟,陈向成,王亚军. 改进的双频几何约束条纹投影三维测量方法. 红外与激光工程, 2020, 49(6): 20200049--1

【2】刘路,奚冬冬,程磊,王玉伟,蔡柏林,周挥宇. 改进格雷码条纹投影三维测量方法. 红外与激光工程, 2020, 49(11): 20200314-20200314

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