| 徐 鹏,刘锦涛,王建华.改进的双 N 步相移轮廓术[J].电子测量与仪器学报,2022,36(8):213-222 |
| 改进的双 N 步相移轮廓术 |
| Improved double N-step phase-shifting profilometry |
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| DOI： |
| 中文关键词: 三维测量 相位误差 双 N 步相移法 相位展开可靠度 |
| 英文关键词:three-dimensional measurement phase error double N-step phase shift method phase unwrapping reliability |
| 基金项目:山东省自然科学基金（ZR2021MF024）项目资助 |
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| 中文摘要: |
| 条纹投影三维测量中,双 N 步相移轮廓术通过扩充一倍的投影条纹数量以补偿由测量系统的非线性响应导致的相位
误差,但测量效率也因此降低。 针对这一问题,提出了一种改进的双 N 步相移方法,该方法与传统的双 N 步相移法相比,在减
少相移条纹数量的同时保持了测量精度。 利用删减后的条纹计算原始和附加相位值,融合两相位实现物体的三维重建。 实验
结果表明,与传统双 N 步相移法相比,所提方法具有相同的相位误差补偿精度,并将测量效率提高了 16. 7%,同时证实了本文
采用的三频分层相位展开的可靠度要优于三频外差法的相位展开可靠度。 |
| 英文摘要: |
| In fringe projection three-dimensional measurement, double N-step phase-shifting profilometry compensates the phase error
caused by the nonlinear response of the measurement system by expand twice the number of projection fringes, but the measurement
efficiency is also reduced. To address the above concerns, an improved double N-step phase-shifting method is proposed in this paper.
Compared with the traditional double N-step phase-shifting method, the proposed method can reduce the number of phase-shifting fringes
while maintaining the measurement accuracy. The original and additional phase are calculated by using the deleted fringes, and the two
phases are fused to realize the three-dimensional reconstruction of the object. Experimental results demonstrate that the proposed method
has the same phase error compensation accuracy as the traditional double N-step phase-shifting method, and the measurement efficiency
of the proposed method is improved by 16. 7%. At the same time, it is confirmed that the reliability of the three-frequency hierarchical
phase unwrapping used in this paper is better than that of the three-frequency heterodyne method. |
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