| 摘要 |
<p>The invention relates to a method of operating a surveying instrument ( 10 ) placed in a orthogonal XYZ-system at (0,0,0) having a movable unit ( 20 ), said instrument defining a sight line ( 128 ) that is controllably rotatable around a first axis ( 50 ), essentially horizontal, and around a second axis ( 90 ), essentially vertical, wherein said second axis ( 90 ) may be inaccurately positioned so that it deviates from a true vertical axis, and said first axis ( 50 ) may deviate from being orthogonal to the second axis ( 90 ); the method comprising the steps of determining at least one of the following group of errors relating to the instrument and/or its location: a) a trunnion axis error T as a function of the deviation from 90 degrees between the first axis ( 50 ) and the second axis; b) a horizontal collimation error CH, being the deviation between the sight line ( 128 ) and the perpendicular angle as related to the first axis ( 50 ); and c) a total plumb error defined by components, PI and PII, being two separate angular values defining the tilt of the instrument as related to the plumb line through the same; and d) using these determined values in continuously controlling the alignment when aiming the instrument. The invention also relates to a surveying instrument for use with the method and an error compensation system for a surveying instrument.</p> |
