Machine vision based turn plate angle high-precision online measurement method

A measurement method and machine vision technology, applied in measurement devices, instruments, optical devices, etc., can solve the problems that the measurement process is easily affected by human errors, the traditional methods cannot well meet the automation of industrial production, and the measurement efficiency is low.

Inactive Publication Date: 2018-05-08
CHANGSHA XIANGJI HAIDUN TECH CO LTD
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Problems solved by technology

[0002] The traditional methods of workpiece angle measurement are mostly carried out manually, using simple mechanical devices or optical instruments. The measurement process is cumbersome, the measurement efficiency is low, and the measurement process is easily af...

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  • Machine vision based turn plate angle high-precision online measurement method
  • Machine vision based turn plate angle high-precision online measurement method
  • Machine vision based turn plate angle high-precision online measurement method

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Embodiment Construction

[0071] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0072] as attached figure 1 As shown, a machine vision-based high-precision online measurement system for turntable angle. In order to complete the angle measurement function, the hardware used in the present invention includes a 3,000,000-pixel high-definition CMOS industrial camera, a 6mm fixed-focus lens, an LED backlight light source, a computer, and a turntable to be measured (see attached image 3 ), two reference circles are marked on the turntable by punching holes, one of which is the circle where the center of the turntable is located, with a diameter of 8mm, and its center is point P1, and the other reference circle is 5mm in diameter, and its center is marked as P2. The LED ring light source can help improve the image quality collected by the industrial camera. The industrial camera collects the image of the turntable to be tested...

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Abstract

The invention discloses a machine vision based turn plate angle high-precision online measurement method. Real time image collection is performed on mark round hole points in a turn plate by utilizinga monocular industrial camera. Through vision and image metrology analysis on acquired images, position information of the mark round hole points in the turn plate can be obtained. Then rotation angle information can be calculated through a geometric method. The advantages of the invention achieved in angle measurement include high measurement speed and realization of real time online measurement; avoidance of influence and damage to working piece surface through implementation of a measurement function by adoption of a non-contact technology; and elimination of interference on measurement results due to lighting environment complexity, spray liquid, water spots and the like in a production field through adoption of an improvement algorithm in the highest level.

Description

technical field [0001] The invention relates to the technical field of machine vision and optical image measurement, in particular to a high-precision online angle measurement method based on machine vision and optical image measurement technology. Background technique [0002] The traditional methods of workpiece angle measurement are mostly carried out manually, using simple mechanical devices or optical instruments, etc. The measurement process is cumbersome, the measurement efficiency is low, and the measurement process is easily affected by human errors. With the development of the manufacturing industry, the requirements for measurement accuracy and speed are getting higher and higher, and the traditional methods can no longer meet the development requirements of industrial production automation. [0003] Machine vision is to make the machine have the function of imitating biological vision, and obtain the required identification or measurement information by obtaining...

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Application Information

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IPC IPC(8): G01B11/26
CPCG01B11/26
Inventor 肖玉飞周翔刘俊涂宏斌周继辉田炜
Owner CHANGSHA XIANGJI HAIDUN TECH CO LTD
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