VERIFICATION OR CALIBRATION OF TOTAL STATION
Abstract
The analysis of procedures of metrological control of total stations is presented. Specifics of total stations metrological control are considered. As an example, the Odesa reference linear basis of geodesic polygon consisting of 7 fundamental geodesic stations situated on the plain seismically safe site is presented. A number of problems concerning the use of the existing standards are stated. The concept of a new method of total stations metrological control is proposed. The purpose of the new method is to create an additional stage of metrological control to allow qualitative and efficient metrological control of total stations that had not been subject to verification procedure previously due to various reasons. Investigations in connection with the use of the new method of total stations metrological control were carried out on the existing experimental reference base. The article presents the calculation of the mean-square error in measuring distances by way of multiple measuring the reference base lines. Current instruments for measuring large linear distances as well as the existing methods of their metrological control are examined. The peculiarities of metrological control of total stations are considered and the task of its simplification by combining standard measuring instruments for metrological control of distance and angle measurements in a single measuring instrument are formulated. The peculiarities of metrological control of total stations are considered and the task of its simplification by combining standard measuring instruments for metrological control of distance and angle measurements in a single measuring instrument are formulated. Classification of geodetic measuring instruments depending on the location and conditions of their metrological control is proposed. The constants and corrections that are monitored during the calibration of total stations are given. The angle and distance parts of total station errors are listed. The parameters of total stations that need to be monitored during verification are considered. The variants of application of various technical means and methods of measurement during calibration are considered in detail. Alternative methods for calculating the mean square error of distance measurements using total stations are presented. An international approach to the repair, verification and calibration of total stations has been analyzed. It is proposed to develop a normative legal act to define the criteria for the competence of carrying out repairs, conditions and rules for repairing measuring instruments and devices.
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