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小平板视距测量计算工作较繁,虽有制成之表可查,但求高度差时,仍须进行计算。1964年测量时,我们制成小平板测量视距贯线图。实践证明,图解计算迅速力便,精度足够。现介绍如下,仅供参考。(1)公式:(2)用法:X=n_1-n_2;Y=n_2-n_3读出 X 与 Y 的格数后,用三角板的一边连 X 与 Y 成一直线,截 L 数轴的数为水平距离 L(米);截 h 数轴的数为高度差 h(米)。仰角高差为正,俯角高差为负。
Small slab sight measurement and calculation work more complicated, although made of the table can be found, but the height difference, still have to be calculated. When measured in 1964, we made a microtitremeter line-of-sight measurement. Practice has proved that the graphical computing speed and strength, accuracy is sufficient. Now introduced as follows, for reference only. (1) Formula: (2) Usage: X = n_1-n_2; Y = n_2-n_3 After reading out the numbers of X and Y, connect one side of the square with X and Y in a straight line, L (m); number of truncated h-axis height difference h (m). Elevation elevation is positive, depression elevation is negative.