Abstract
The test bench for testing and calibrating the measuring geodetic instruments for flat angle measurements has been created at Vilnius Gediminas Technical University, Institute of Geodesy. This test rig incorporates multiple-angular position determination principles – photoelectric angular encoder, polygon-autocollimator and circular-scale-microscope. Such a diversity of implemented methods allows cross-calibration and testing each principle using the other one. Similarly, there may be multiple methods of testing and cross-calibration used. The covariation and correlation analysis of the measurement data are received and analysed.
Highlights
Precise geodetic instruments are widely used in geodesy, building structures, surveying, machine engineering etc
Accuracy of the angle measurement performed by the instrument must be tested in the field conditions using the known length reference measure
Using such method it is possible to get only a very restricted number of angular measurements; it does not allow to collect a large number of different angular values though geodetic instruments produce a vast number of discrete values on their display unit during measurement, and these values must be checked [4, 5]
Summary
Precise geodetic instruments are widely used in geodesy, building structures, surveying, machine engineering etc. Accuracy of the angle measurement performed by the instrument must be tested in the field conditions using the known length reference measure (triangulation principle) Using such method it is possible to get only a very restricted number of angular measurements; it does not allow to collect a large number of different (desired) angular values though geodetic instruments produce a vast number of discrete values on their display unit during measurement, and these values must be checked [4, 5]. Few test benches are used which allow to perform a complex testing and calibration of planar angle for geodetic instruments [6] Such test rigs should have the angle determination (or positioning) precision much (3–5 times) higher than precision of tested (calibrated) devices. In this paper we present some statistical correlation and covariation analysis of some test results
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