The angular displacement of reflecting surface is measured in accordance with the direction change of Moire fringes caused by the inclinationof grating. self-imaging plane.
利用光栅自成象面的倾斜引起莫尔条纹方向变化来测量反射表面的角位移。
2
All studies show that weak planeinclination, thickness and whether be run through or not have a significant impact on longitudinal wave velocity, average modulus and strength of specimens.
研究结果表明：弱面的倾角、厚度及是否贯通等对试样的纵波速度、平均模量和强度具有显著的影响。
3
According to the testing data after three years, the planeinclination, non-planeinclination and arch degree of the oil tank foundation are analyzed.