A Method of Measuring Three-Dimensional Small Angles Based on the Principle of Autocollimation
A small-angle, self-collimation technology, applied in the direction of measuring angles, measuring devices, surveying and navigation, etc., can solve the problems that cannot be applied in the field of three-dimensional angle measurement, and achieve the effect of low power consumption, easy implementation, and small environmental space requirements
Inactive Publication Date: 2018-07-24
HARBIN UNIV OF SCI & TECH
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[0022] However, the current small-angle measuring instrument designed based on the principle of self-collimation can only be applied to one-dimensional or two-dimensional angle measurement, and cannot be applied to the field of three-dimensional angle measurement. Methods
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[0046] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0047] Such as Figure 1~4 Shown, a kind of method of measuring three-dimensional small angle based on the principle of autocollimation of the present invention, it comprises the following steps:
[0048] S1, set x 0 、y 0 ,z 0 are the three coordinate axes of the known three-dimensional Cartesian coordinate system, and the upward direction is x 0 , the outward direction perpendicular to the paper surface is y 0 , the direction to the right is z 0 ;
[0049] S2, mirrors A and B around y 0 ,z 0 Adjust the two directions to make the reflected light return to the autocollimator accurately, and the measured value of the autocollimator A is denoted as A x 、A y ,...
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A three-dimensional small angle measuring method based on an auto-collimation principle is disclosed. The method includes setting x0, y0 and z0 as three coordinate axes of a known three-dimensional coordinate system, denoting a measurement value of an autocollimator A as Ax,Ay, denoting a measurement value of an autocollimator B as Bx,By with mirrors A and B being adjustable in direction and the autocollimator A and the autocollimator B being for two-dimension sensitive measurement, and setting small angles of the x0, the y0 and the z0 to be alpha, beta and gamma respectively. According to a small-angle decomposition principle, a reading around the x1 direction of the autocollimator A is synthesis of the alpha and the beta, a reading beta around the y0 direction is directly read out from the y1 direction of the autocollimators as the y0 axis and the y1 axis are parallel to each other, and a reading around the z2 direction of the autocollimator B is synthesis of the alpha that is a reading around the x0 direction and the gamma that is a reading around the z0 direction. The small angles of the three directions of a stretching bar can be obtained according to the three equations mentioned above. The method has advantages of high precision, high reliability, low power consumption, low requirements on environment, and capability of being easily achieved.
Description
technical field [0001] The invention relates to a method for measuring three-dimensional small angles based on the principle of self-collimation. Background technique [0002] The main methods of small angle measurement at home and abroad are: mechanical angle measurement method, electromagnetic angle measurement method, optical angle measurement method, etc. [0003] 1. Mechanical angle measurement method: [0004] Mechanical angle measurement is the earliest angle measurement technology, and the main representative instrument is the multi-tooth indexing table. The multi-tooth indexing table is a mechanical angle measuring device, which can not only be used as a benchmark for angle measurement, but also can be used as a precision instrument for angle generation. It uses a pair of two plane gears with identical parameters such as diameter, number of teeth, tooth shape, etc., and performs precision indexing through the average effect of relative rotation and tooth meshing, ...
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IPC IPC(8): G01C1/00G01B11/26
CPCG01B11/26G01C1/00
Inventor 刘泊王明星吴华侨李文环张明
Owner HARBIN UNIV OF SCI & TECH