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今年二月在武汉市举行全国测绘科学技术成就展览会上曾展出很多适用于小型水利工程建设的测量仪器,这里介绍其中三种,供读者参考。一、悬锤水准仪构造如图:包括:观测筒、垂杆、锤球、转动盘,仪器架等,观测筒与垂杆垂直地钉在一起(越垂直测平时精度越高)悬在仪器架之转动盘上,可在仪器架内转动观测,垂杆下悬一重锤,在垂杆之轴线上,除重锤外,均用木材制成。平行原理;因重锤必垂直地面,则与重锤方向垂直的观测筒
In February this year, held in Wuhan City National Exhibition of Science and Technology Achievements Exhibition has exhibited a lot suitable for small-scale water conservancy construction measuring instruments, here are three of them, for readers reference. First, the hammer level structure shown in Figure: Including: observation tube, vertical rod, hammer ball, rotating disk, instrument rack, etc., and the vertical rod perpendicular to the observation tube together (the more accurate vertical measuring) suspended in the instrument rack The rotating disk can be rotated in the instrument rack observation, hanging rod under the hammer, in the axis of the rod, in addition to the hammer, are made of wood. Parallel principle; Because the hammer must be perpendicular to the ground, then the direction perpendicular to the weight of the observation cylinder