FIELD: geodesy.
SUBSTANCE: method can be used for measurement of excesses in leveled points, especially when taking measurements under undesired conditions like vibration, shading, fluxes of non-uniform heated air etc. Flexible thread is suspended between leveled points. Thread is pulled by built-in vibrator; load is freely suspended at roller, which roller fixes point of maximal sag. Section between point of suspension of load and marked center of thread is measured. Excess is measured from formula of h=2Δl√1-(L/l)2, where L is projection of length of thread l onto horizontal plane and Δl is section between point of maximal sag and central part of thread.
EFFECT: improved precision of measurement; improved precision of measurement of location of maximal sag; simplified calculation of excesses.
2 dwg
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