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水准仪是一种建立直线和水准面的光学测量仪器。在飞机制造业中,主要用于安装型架和校平飞机。水准仪的视轴与长水准器轴(以下简称水准轴)在铅垂平面上投影的夹角,即所谓i角,是水准仪使用时一个重要的指标。在非等距测量中,i角的大小直接影响测量的准确度。如对同一平面内视距相差10米的两个目标(例如型架的接头)定位,在不考虑如调
Level is a straight line and the establishment of optical measurement instruments. In the aircraft manufacturing industry, mainly used for mounting frame and leveling aircraft. Level of the visual axis and the level of the long axis (hereinafter referred to as the level axis) in the vertical plane projection angle, the so-called i-angle, is an important indicator of the level of use. In non-isometric measurements, the size of angle i directly affects the accuracy of the measurement. Such as the same plane within 10 meters from the two objectives (such as the frame of the joints) positioning, without regard to tune