Machine vision integrated service system based on multiple protocols

Abstract

The invention discloses a machine vision integrated service system based on multiple protocols, which comprises a multi-structure controllable vision module, a tubular defect image acquisition module and an inner surface multi-image processing module, the multi-structure controllable vision module is used for providing point light source illumination, the line scanning camera and the liquid telecentric lens are used for picking up defect characteristics of the inner surface of the tubular object, and the tubular defect image acquisition module is used for clamping the tubular object to be detected to rotate left and right for a circle and do linear motion up and down to form an inner surface circumference morphology image; the inner surface multi-image processing module is used for splicing the circumferential morphology images at different axial positions to form a complete circumferential morphology image of the inner surface of the object to be detected, and the multi-structure controllable vision module is electrically connected with the tubular defect image acquisition module. The tubular defect image acquisition module is electrically connected with the inner surface multi-image processing module, and the device has the advantages of being high in detection accuracy and making up for insufficient internal light.

Description

technical field [0001] The invention relates to the technical field of defect detection on the inner surface of a tubular object, in particular to a multi-protocol-based machine vision integrated service system. Background technique [0002] In the production process of tubular materials, due to factors such as production technology, production materials, production equipment, etc., there will be spots caused by various impurities in the raw materials of tubular objects or pollution of the production environment, and scratches caused by mechanical collisions during the production process. Marks, pits, and even internal surface defects such as material cracks caused by too many harmful elements in the raw materials produced or excessive mechanical pressure applied, and defects on the inner surface of tubular objects are one of the key points of their quality control. The inner space of the object is limited, the detection aperture is small but the detection length is large, a...

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Problems solved by technology

[0002] During the production process of tubular materials, due to factors such as production technology, production materials, and production equipment, there will be spots caused by various impurities in the raw materials of tubular objects or pollution of the production environment, as well as scratches caused by mechanical collisions during the production process. marks, pits, and even internal surface defects such as material cracks caused by too many harmful elements in the raw materials produced or excessive mechanical pressure applied, and the defects on the inner surface of tubular objects are one of the key points of its quality control. The internal space of the object is limited, the detection aperture is small but the detection length is large. To a large extent, insufficient light prevents the inner surface from obtaining high-brightness and uniform illumination. Conventional surface inspection equipment and methods are not applicable. Therefore, for the inner surface of tubular objects Defect detection is a more difficult step in the inspection process

[0003] At present, the mainstream method of detecting inner surface defects of small-sized tubular objects is the manual visual inspection method, that is, using an endoscope with a magnification of several tens of magnifications to observe the inner surface through human eyes. This method consumes a lot of manpower and is inefficient. The manual visual inspection method with speculum as the main inspection tool is heavily dependent on the experience and skill proficiency of inspectors, and has strong subjective randomness, lack of uniform standards, it is difficult to ensure the consistency of the quality of tubular objects, low efficiency and cost High, and when conventional visual sources such as coaxial sources and ring sources are used for detection, for tubular objects with relatively large length and diameter, the inner wall of the tubular object cannot be uniformly illuminated, resulting in the inability of visual software to judge defects, and laser technology is used for detection There will be speckle, which affects the judgment of defects. Due to the limitation of detection technology and means, the defect detection of the inner surface of tubular objects is blind, resulting in the waste of manpower, material and financial resources. That is, the defect detection of the inner surface of tubular objects Technology makes more pressing demands

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