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A visual absolute rotation angle measurement method and device

A technology of rotation angle and measurement method, applied in the direction of measuring device, optical device, image analysis, etc., to achieve continuous measurement capability, reduce manufacturing process complexity, and low processing and installation accuracy

Active Publication Date: 2022-06-24
SICHUAN WINDOM PHOTOELECTRIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a visual absolute rotation angle measurement method and device to solve the above-mentioned problems existing in the measurement of the grating ruler

Method used

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  • A visual absolute rotation angle measurement method and device
  • A visual absolute rotation angle measurement method and device
  • A visual absolute rotation angle measurement method and device

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Embodiment

[0057] like Figure 1-2As shown, the present embodiment proposes a visual absolute rotation angle measurement device, comprising a CCD camera 1 and a circular code wheel 2, and the middle of the code wheel 2 is rotated by connecting a rotating shaft 4;

[0058] The circular ring of the code wheel 2 is evenly distributed with n co-circular grayscale marks 3, and the grayscale values ​​of each grayscale mark 3 correspond to n-level grayscales set at even intervals in the grayscale value interval of 0-255. degree value;

[0059] The CCD camera 1 is arranged above the code disc 2, so that its photographing field of view is aligned with the grayscale mark 3, and at least one complete grayscale mark 3 exists in its photographing field of view at any time.

[0060] The present invention is further described by taking n=8 as an example, see figure 1 , there are 8 grayscale identifiers 3 in total, all of which are solid circles with different grayscale values, and they are all circle...

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Abstract

The invention provides a visual absolute rotation angle measurement method and device, the device includes a CCD camera and a ring-shaped code disc, the middle part of the code disc is rotated by connecting a rotating shaft; the circular ring of the code disc is uniform There are n co-circular gray marks distributed, and the gray value of each gray mark corresponds to the n-level gray value set at uniform intervals in the gray value range of 0‑255 respectively; the CCD camera is arranged on the code disc Above, make its shooting field of view align with the gray mark, and at any time there is at least one complete gray mark in its shooting field of view. The measuring device of the present invention has absolute positioning capability and at the same time has extremely small rotation angle measurement resolution.

Description

technical field [0001] The invention relates to the technical field of angle measurement, in particular to a visual absolute rotation angle measurement method and device. Background technique [0002] The precise measurement of the moving distance of the plane is a common general requirement, which is often used in the closed-loop servo system of CNC machine tools, and can be used for the detection of linear displacement or angular displacement. At present, grating scale measurement is mainly used in the industrial field, which is also called grating scale displacement sensor or grating scale sensor, which is a measurement feedback device that works by using the optical principle of grating. [0003] There are two main materials for making gratings: [0004] 1. Glass ruler with engraved line (effective measurement length below 3 meters) [0005] 2. Steel tape ruler for engraving [0006] In special working conditions with vibration, shock, and high reliability requirement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/26G06T7/11G06T7/136G06T7/66G06T7/70G06T7/80
CPCG01B11/26G06T7/70G06T7/80G06T7/11G06T7/136G06T7/66
Inventor 王德麾姜世平杨武代冬军郑鑫力昌兵
Owner SICHUAN WINDOM PHOTOELECTRIC TECH
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