Goniometer verification method based on optical lever

A technology of optical levers and photodetectors, applied in instruments, measuring devices, etc.

Active Publication Date: 2013-04-24
YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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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 t

Method used

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  • Goniometer verification method based on optical lever
  • Goniometer verification method based on optical lever
  • Goniometer verification method based on optical lever

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Experimental program
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Embodiment Construction

[0076] The verification method of an angle measuring device based on an optical lever comprises the following sequential steps:

[0077] Step 1: Build a verification device in a closed and light-proof room, and install the angle measuring device to be verified, including the following steps:

[0078] Such as figure 2 As shown, the lower turntable 2 is installed on the verification platform 1, such as Figure 4 As shown, the lower turntable 2 is composed of a base 22 and a lower turntable 23, and the rotating shaft 24 on the lower turntable 23 is sleeved on the rolling bearing 25 on the base 22;

[0079] Install the bottom two-dimensional manual translation adjustment platform 4 with the adapter flange 3 on the lower turntable 23, and install the mounting seat 6 of the angle measuring device 7 to be verified with the adapter flange 5 on the bottom two-dimensional manual translation adjustment platform 4;

[0080] The angle measuring device 7 to be tested is an annular angle ...

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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...

Claims

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Application Information

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IPC IPC(8): G01B21/22
Inventor 程向明张益恭赵志军杨磊陈林飞苏婕王建成
Owner YUNNAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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