基于相位信息的三维视觉测量技术研究

Research on 3d vision measurement technology based on phase information

随着三维视觉技术广泛应用于类镜面测量,对其精度的要求也日益严苛。基于相位信息的三维视觉测量技术,向被测物表面投影条纹光,然后获取经被测物表面调制后的图像,解调出待测物的相位信息,进而重建物体三维信息。通过论述相位测量轮廓术(PMP)和相位测量偏折术(PMD)的原理和检测流程,分析出该检测系统的误差来源。重点论述了4种PMD系统模型,用于克服相位测量偏折术的结果多义性问题。

As 3 d vision technology is widely used in mirror like measurement,its accuracy requirements are increasingly demanding.Three-dimensional vision measurement technology based on phase information projectors structure light to the surface of the object to be measured,then obtains the modulated image of the surface of the object to be measured,demodulate the phase information of the object to be measured,and then reconstruct the three-dimensional information of the object.By discussing the principle and process of phase measurement profilometry(PMP)and phase measurement deflection(PMD),the error sources of the detection system are analyzed.Four PMD system models are emphatically discussed to overcome the ambiguity of the results of phase measurement deflection.Finally,the further research of phase deflection technique in precision measurement is summarized.