CIVIL ENGINEERING MEASURING METHOD ACCORDING TO THREE-DIMENSIONAL MEASURING SYSTEM

摘要

PURPOSE:To obtain the space coordinates of each of measuring points and the distance between said points in a non-contact state by converting the horizontal and vertical angles obtained by simultaneously collimating the measuring point by two digital transits to the direction cosine of the straight line on a space to determine the straight line on the space. CONSTITUTION:The measuring point P arranged to a civil engineering structure is simultaneously collimated using two digital transits 1 and the optical axes of respective telescopes are regarded as the straight lines on a space. The straight lines l1, l2 passing the points P1, P2 where the transits 1 are arranged can be specified as the straight lines on the space if a direction cosine is clear. The measured values of horizontal and vertical angles at that time are outputted as digital signals from the transits 1 to be read in a personal computer 3 brought to an on-line system and the space coordinates of the intersecting point being the common point of both straight lines l1, l2 are calculated. After the determination of the coordinates, the personal computer 3 calculates the distance between the measuring points.