Absolute horizontal reference precision test system and test method thereof

Abstract

The invention relates to an absolute horizontal reference precision test system and a test method thereof. The absolute horizontal reference precision testing system includes a two-dimensional electronic level, a plane mirror, a leveling base and a biaxial autocollimator; the two-dimensional electronic level, the plane mirror and the leveling base are sequentially arranged together from top to bottom; and the biaxial autocollimator is arranged above the plane mirror, and the biaxial autocollimator and the plane mirror are arranged in a same optical path. The absolute horizontal reference precision testing system and the test method have the advantages of high automation, high efficiency and high precision.

Description

technical field [0001] The invention belongs to the technical field of precision optical testing, and relates to a horizontal reference precision testing system, in particular to an absolute horizontal reference precision testing system and a testing method. Background technique [0002] The horizontal reference device can provide an absolute horizontal reference. It is widely used in laboratory calibration, precision metrology, geodetic survey, shooting range survey, civil engineering and other fields. Accurate absolute horizontal reference is also the prerequisite for calibration measurement and project implementation. Absolute horizontal reference accuracy is the most important technical index of the horizontal reference device, and it is the standard to measure the performance of the horizontal reference device. [0003] Due to the natural characteristics of mercury, it is often chosen as the most important raw material for making horizontal reference devices. This hori...

AI Technical Summary

Problems solved by technology

[0005] There are many disadvantages in the traditional test method: First, the installation of the plane reflector is cumbersome, and the normal line of the mirror surface should form an angle of 45° with the horizontal. If there is any deviation in this angle, it will affect the final test accuracy. Second, slowly turn the turntable 180°, the purpose is to make the mercury liquid surface rotate to the radial direction as a whole, but in fact the mercury liquid surface cannot completely rotate 180°, resulting in The measured value in the direction is not accurate enough; third, the tester will introduce aiming error through the visual aiming of the autocollimation theodolite; fourth, the self-collimation light needs to be refracted by the plane mirror, the number of reflections is too many, and the light return effect is poor ; Fifth, during the test, the mercury level needs to be stabilized twice, and the test time is too long

[0006] It can be seen that using the traditional method to test the absolute horizontal reference accuracy of the horizontal reference device, the installation of instruments and equipment is cumbersome, many error sources are introduced during the test process, the test accuracy is not high, and the test time is too long and the efficiency is low

Images