光电技术应用
光電技術應用
광전기술응용
ELECTRO-OPTIC WARFARE & RADAR PASSIVE COUNTERMEASURES
2014年
4期
65-68
,共4页
信息光学%三维测量%相移法%相位测量轮廓术
信息光學%三維測量%相移法%相位測量輪廓術
신식광학%삼유측량%상이법%상위측량륜곽술
information optics%three-dimensional measurement%phase-shifting method%phase measuring pro-filometry
提出一种基于三步非定步相移的三维面形测量方法。首先将投影仪投出的光栅进行预校正,保证投到参考面的条纹为标准的正弦条纹。测量时,由投影仪投影三幅等相移量的光栅到待测物体表面,CCD相机对应采集三帧变形条纹图,由相位计算模型提取相位。最后通过高度映射公式恢复待测物体的三维面形。该方法有较好的抗噪性能,在噪声较大情况下,仍能进行测量,为动态在线测量奠定了基础。模拟及初步实验均验证了该方法的可行性。
提齣一種基于三步非定步相移的三維麵形測量方法。首先將投影儀投齣的光柵進行預校正,保證投到參攷麵的條紋為標準的正絃條紋。測量時,由投影儀投影三幅等相移量的光柵到待測物體錶麵,CCD相機對應採集三幀變形條紋圖,由相位計算模型提取相位。最後通過高度映射公式恢複待測物體的三維麵形。該方法有較好的抗譟性能,在譟聲較大情況下,仍能進行測量,為動態在線測量奠定瞭基礎。模擬及初步實驗均驗證瞭該方法的可行性。
제출일충기우삼보비정보상이적삼유면형측량방법。수선장투영의투출적광책진행예교정,보증투도삼고면적조문위표준적정현조문。측량시,유투영의투영삼폭등상이량적광책도대측물체표면,CCD상궤대응채집삼정변형조문도,유상위계산모형제취상위。최후통과고도영사공식회복대측물체적삼유면형。해방법유교호적항조성능,재조성교대정황하,잉능진행측량,위동태재선측량전정료기출。모의급초보실험균험증료해방법적가행성。
A method to measure the three-dimensional (3D) surface figure based on three step phase-shifting is proposed. Firstly, the grating projected by a projector is pre-corrected to assure standard sinusoidal fringe projected on the reference surface. Secondly, three frames of grating with same phase-shifting are projected on the surface of the tested object by a projector during measurement. Three frames of deformation fringe patterns are captured by a CCD camera and the phase is extracted from a phase calculation model. Finally, the 3D surface figure of the tested object can be reconstructed by height mapping formula. The method has stronger anti-noise ability, measurement process can still be performed in large noise environment, which lay a foundation for dynamic on-line measurement. The feasibility of this method is verified by simulations and initial experiments.