Goniometer verification method based on optical lever

Abstract

The utility model discloses a goniometer verification method based on an optical lever and belongs to the technical field of angle error measurement. The goniometer verification method based on the optical lever aims to resolve the problem that an existing goniometer verification device is expensive and low in verification precision. The goniometer verification method based on the optical lever comprises the following steps: (1) installing a lower rotary table, an upper rotary table, a plane mirror, a laser device, a photoelectric detector and a reading head on a verification platform, and controlling a laser after being reflected by the plane mirror to impinge on a target surface of the photoelectric detector; (2) collecting initial point light spot image data; controlling the lower rotary table to drive the upper rotary table and the plane mirror to rotate, so that the reflected light after being deflected impinges on the target surface, and collecting the measurement values of a marked angle and a angle increment; controlling the upper rotary table to rotate in a reverse direction, so that the reflected light after being reversed impinges on the target surface; calculating the standard value sequence of the angle increment; calculating the standard value sequence of the marked angle. The goniometer verification method based on the optical lever is simple in device, low in cost and capable of improving the precision of the goniometer.

Description

technical field [0001] The invention belongs to the technical field of angle error measurement, in particular to a verification method of an angle measuring device. Background technique [0002] There are various methods of angle measurement, which can be roughly divided into mechanical methods (such as multi-tooth indexing disc, lever method), electromagnetic methods (such as circular magnetic grid, circular induction synchro) and photoelectric methods (such as optical dividing head, degree disc, regular polyhedral prism angle measurement, code disk angle measurement, grating angle measurement, ring laser angle measurement, laser interferometry angle measurement), etc. [0003] The mechanical method is represented by a multi-tooth indexing plate, using high-precision gears as the basis for indexing, and can improve resolution and accuracy through differential motion. The advantage of this method is that the accuracy is relatively stable, and the measurement accuracy of the...

AI Technical Summary

Problems solved by technology

Due to the conversion relationship between angle and linear displacement, this principle can also be used for the measurement of small angular displacement in addition to the measurement of small linear displacement. At present, there is no record of using the principle of optical lever as the measurement and calibration of goniometer devices.

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