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Visual detection method for inner wall structure of annular body

A technology of visual detection and annular body, applied in the direction of measuring devices, instruments, etc., can solve the problems that the reliability of manual detection cannot be guaranteed, it is easy to introduce human error or misjudgment, and it is not conducive to automatic production and assembly, so as to achieve simple structure and easy collection , the effect of low-cost detection

Inactive Publication Date: 2018-08-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) From the perspective of production process and cost, manual inspection will introduce unnecessary additional links to the production and assembly of the annular body, which is not conducive to the realization of fully automatic production and assembly, and will also increase labor costs;
[0005] (2) From the perspective of production efficiency, the speed of manual detection is slow and it is difficult to realize online detection;
[0006] (3) From the perspective of detection results, the reliability of manual detection cannot be guaranteed, and it is easy to introduce human error or misjudgment

Method used

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  • Visual detection method for inner wall structure of annular body
  • Visual detection method for inner wall structure of annular body
  • Visual detection method for inner wall structure of annular body

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Embodiment Construction

[0023] The present invention will be described below in conjunction with the accompanying drawings and examples.

[0024] Such as figure 1 As shown, the main structures required by the visual inspection system of the ring inner wall structure provided by the present invention are a camera 1 and a conical mirror 3, through which relevant information such as structures 4, 5 and 6 on the inner wall 2 of the ring body can be detected. Detection principle such as figure 2 As shown, first, the inner wall 2 of the ring is imaged as 9 by the conical mirror. By rationally designing the conical mirror, 9 can be located on the same plane as possible and facing the camera. Subsequently, the image 9 is captured by the camera 1 composed of the image sensor 11 and the lens 12 to obtain the image 10 . Such as figure 2 As shown in the figure, the ring body structure with a keyway on the inner wall is placed on the transparent plate 13, and the highest point of the conical mirror is lower...

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Abstract

The invention relates to a visual detection method for an inner wall structure of an annular body. A used detection system comprises a camera, a computer and a conical-surface reflector, the conical-surface reflector and the camera are positioned at the two sides of the inner wall of the annular body and just face the camera, and an image formed by the conical surface reflector of the inner wall of the annular body is collected by the camera. The detection method comprises that lower and upper boundaries of the inner wall are positioned by edge extraction and oval fitting, and position withinthe boundaries is an image position corresponding to the inner wall of the annular body; a polar coordinate system is established according to the identified image position, the polar radius and polarangle corresponding to the height and azimuth of the inner wall of the original annular body; and correspondence between the polar radius and the practical inner wall height is obtained by calibration; the inner wall structure of the annular body is identified by means of feature extraction, and position information of the inner wall structure is calculated according to a calibration result before; and whether the inner wall structure is qualified is determined.

Description

technical field [0001] The invention relates to a visual inspection system for an annular inner wall structure. Background technique [0002] The annular body with structure on the inner wall is a common mechanical part, which is widely used in many mechanical transmission fields such as planetary gear transmission structure. With the continuous increase of its application requirements, it has entered the era of mass production and assembly. According to different application occasions, the annular body with structure on the inner wall often has different structures such as slider grooves at some positions on the inner wall surface. Considering that in the process of mass production, it is inevitable that the missing sequence or misplacement of processing will occur. Therefore, before the automatic assembly, it is often necessary to first detect the key structure to avoid the mechanical structure caused by the missing sequence or misalignment of processing. Collision, even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 张效栋闫宁
Owner TIANJIN UNIV
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