Method for calibrating spatial coordinate measuring system of electronic theodolite

Abstract

The invention discloses a method for calibrating a spatial coordinate measuring system of an electronic theodolite, which aims to meet the need that the measuring system of the electronic theodolite calibrates in the range of tens of meters in any direction at an angle of horizontal 360 DEG and pitching + / -45 DEG. The method comprises the following steps of: placing instruments and targets; 2, using a laser radar scanner to assign a value to the targets to form a standard instrument group; step 3, the calibrated system of the electronic theodolite measures each target to obtain measured values; step 4, converting the measured values of the electronic theodolite to a measurement coordinate system of the laser radar scanner; and step 5, comparing the converted measured values of the electronic theodolite with a standard value thereof, and obtaining the measurement deviation and measurement uncertainty evaluation of the measuring system of the electronic theodolite through software analysis. The method meets the need that the measuring system of the electronic theodolite calibrates in the range of tens of meters in any direction at the angle of horizontal 360 DEG and pitching + / -45 DEG.

Description

technical field [0001] The invention relates to a calibration method of a space three-dimensional coordinate measurement system, in particular to a calibration method of an electronic theodolite measurement system. Background technique [0002] There are many types of large-scale spatial measurement instruments, including theodolite measurement system, laser measurement system, photogrammetry system, etc. The measurement principles of various instruments are different, and different measurement principles lead to different methods for evaluating their measurement accuracy. Therefore, large-scale spatial measurement Calibration of instruments has long had no fully formed standards. [0003] In the national "JJG425-2003 Optical Theodolite Verification Regulations" and "JJG100-2003 Total Station Electronic Speed ​​Meter Verification Regulations", the calibration of the angle measurement of a single theodolite is stipulated, and the space of the measurement system composed of mu...

AI Technical Summary

Problems solved by technology

However, since the standard ruler is a physical benchmark, its length should not be too large (generally within 3m), otherwise, not only is it difficult to calibrate the standard ruler, but also when the environmental conditions such as temperature change or the ruler body is deformed, the calibration value will be inaccurate, and the benchmark If the ruler is too long, it will be inconvenient to carry

Therefore, this solution cannot meet the calibration requirements of the electronic theodolite system in the range of tens of meters

[0015] So far, there is no other report on the calibration of electronic theodolite space three-dimensional coordinate measurement at home and abroad

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