Precision detection method of high-precision angle measurement instrument

Abstract

The present invention relates to a precision detection method of a high-precision angle measurement instrument. The method comprises the steps of rotating a rotating part of the detected angle measurement instrument to a position at which a second auto-collimation light pipe aims at a reflection surface of a first plane mirror, and recording an output angle value of the detected angle measurement instrument at the moment; moving a first auto-collimation light pipe to aim at the reflection surface of a second plane mirror; continuously rotating the detected angle measurement instrument to the position at which the first auto-collimation light pipe aims at the reflection surface of the first plane mirror in the same direction, and recording the output angle value of the detected angle measurement instrument at the moment; moving the second auto-collimation light pipe to aim at the reflection surface of the second plane mirror; repeating the above measurement until the integer cycle measurement is finished; and obtaining the precision of the detected angle measurement instrument according to an error between a rotation angle value and a standard angle of the output angle recording of the detected angle measurement instrument. By the precision detection method of the present invention, and by utilizing high-precision aiming and standard angle combination, the precision of the high-precision angle measurement instrument can be detected appropriately and feasibly.

Description

technical field [0001] The invention belongs to the technical field of angle detection of precision instruments, and in particular relates to a precision detection method of a high-precision angle measuring instrument. Background technique [0002] Due to the development of precision angle measuring instruments, the requirements for the accuracy of angle measurement are getting higher and higher, and the traditional detection method of angle measurement accuracy can no longer meet the actual engineering needs. Traditional angle measurement accuracy detection generally adopts the comparison method. A simple structure is to install a high-precision reference element coaxially with the angle measurement instrument as the angle reference, such as high-precision encoders, multi-tooth indexing tables, polyhedral prisms, etc. , the angle reference accuracy is required to be 3 to 4 times higher than the measured instrument, and the angle measurement accuracy can be obtained by obtai...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the detection accuracy of the existing high-precision and structurally limited angle measuring instruments depends on the angle reference and cannot achieve high-precision detection, when the angle reference cannot be installed coaxially (high-precision encoder, multi-tooth indexing) In the case of table, polyhedral prism, etc.), the present invention provides a combination of high-precision aiming and standard angles utilizing two plane reflectors and two optical aiming devices (autocollimation light pipe or autocollimation theodolite) , Appropriate, feasible, precision testing method for high-precision angle measuring instruments (and equipment with angle measuring functions)

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