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Method for Detecting Platform Pose Changes

An attitude change and detection platform technology, which is applied in the field of precision detection and can solve the problems such as the inability to accurately give the rotation component around a specific axis and the limited layout.

Active Publication Date: 2018-05-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the attitude change of the platform, which solves the technical problems in the prior art that the rotation component around a specific axis cannot be accurately given and the layout is limited

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  • Method for Detecting Platform Pose Changes
  • Method for Detecting Platform Pose Changes
  • Method for Detecting Platform Pose Changes

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specific Embodiment 1

[0015] See attached figure 1 And attached figure 2 , the present invention detects the method for platform attitude change, comprises the following steps:

[0016] Step 1: Arrange three detection points in the form of an equilateral triangle on the tested platform, the center of the equilateral triangle coincides with the center of the tested platform 1, and establish a spatial rectangular coordinate system X0YZ with the center of the tested platform 1 as the origin , the X-axis is perpendicular to one side of the equilateral triangle, let the normal vector of the platform be (0,0,1);

[0017] Step 2: Using a displacement detection instrument to monitor the displacement of the attitude change of the measured platform 1;

[0018] Step 3: Detect the displacement of the three detection points in step 1 after the posture change of the tested platform 1, and establish a space Cartesian coordinate system X`0Y`Z` with the center of the tested platform 1 as the origin, and use vect...

specific Embodiment 2

[0021] Step 1: Arrange three detection points A, B and C in the form of an equilateral triangle on the detected platform 1, △ ABC is an equilateral triangle, △ ABC The center of the center coincides with the center of the tested platform 1, and a space Cartesian coordinate system X0YZ is established with the center of the tested platform 1 as the origin. The normal vector is

[0022] Step 2: Using a displacement detection instrument to monitor the displacement of the attitude change of the measured platform 1;

[0023] Step 3: After detecting the attitude change of the tested platform 1, the vertical displacements D1, D2 and D3 of the three detection points in the step 1, and establish a space Cartesian coordinate system X`0Y`Z` with the center of the tested platform 1 as the origin, three The detection points A, B and C correspond to A`, B` and C` after the platform attitude changes, then

[0024]

[0025]

[0026] The platform normal vector n′ after the platform a...

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Abstract

The method for detecting the posture change of the platform of the present invention belongs to the technical field of precision detection, and solves the technical problems of limited measurement range, limited layout, and unclear direction of posture change in the prior art; the present invention evenly distributes three detection points on the detected platform , by monitoring its displacement changes, the rotation components of the platform on different coordinate axes are obtained by using vector cross multiplication and other operations in the space coordinate system; this detection method has a reasonable layout and fast calculation of attitude changes. Closed-loop control provides a solution.

Description

technical field [0001] The invention belongs to the technical field of precision detection, and in particular relates to a method for detecting attitude changes of a platform. Background technique [0002] In research fields such as optical component positioning, precision / ultra-precision machining, and precision testing, the attitude of a specific platform needs to be monitored; adjusting the attitude of the platform requires monitoring the platform; evaluating the stability of the platform also requires monitoring the platform. [0003] The traditional means of monitoring the platform is to monitor the attitude of the platform through a goniometer based on the principle of optical interference, but there are the following technical defects: the measurement range is limited, and the precise rotation component around a specific axis cannot be given; The attitude of the platform monitored by the sensors inside the unit often cannot truly reflect the changes of the platform; o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/22G01B21/02
CPCG01B21/02G01B21/22
Inventor 郭本银苗亮刘钰王辉周烽王丽萍谢耀
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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