Surface inspection scanning system and method

Abstract

The invention relates to a surface detection scanning system. The surface detection scanning system comprises: a liner scanning camera used for scanning and shooting the surface of a measured object, wherein the scanning line of the camera is not vertical to the movement track of the object; a light source irradiating the surface of the measured object at a certain angle, and covering and illuminating the area of the scanning line of the camera on the surface of the measured object; a movement unit used for bearing the linear scanning camera and the light source and moving at a preset speed according to a locus; and a control and imaging processing unit used for controlling the movement unit to move at the preset speed according to the locus, controlling shooting and imaging of the camera to obtain an image, and carrying out corresponding algorithmic operation and treatment to find the flow of the surface of the measured object. Easy missing determination of scratches is avoided (the illumination direction is inconsistent to the scratch direction; and an extruded piece is curved, and the scanning drop of the camera in the curved area is small, so the defocus problem induced by large drop of a scanning area is avoided, and missing determination of small flaws is avoided.

Description

technical field [0001] The invention relates to a surface detection and scanning system and method. Background technique [0002] see figure 2 , for the plastic extruded part 1 (long strip curved surface object), its surface is easy to cause scratches and defects in the extrusion movement direction due to the extrusion process. At this time, the general installation method of the line scan camera 3 is to scan The line is perpendicular to the extrusion movement direction, and the direction of the illuminated area 4 of the light source 2 is parallel to the scanning line 5 . [0003] However, this method will cause scratches to be easily missed (the direction of illumination is consistent with the direction of scratches); and because the extrusion is often curved, in the curved area, the camera is easy to lose focus due to the large drop in the scanning area The problem caused small flaws to be missed. [0004] In view of the above-mentioned defects, the designer is actively...

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Problems solved by technology

[0002] see figure 2 , for the plastic extruded part 1 (long strip curved surface object), its surface is easy to cause scratches and defects in the extrusion movement direction due to the extrusion process. At this time, the general installation method of the line scan camera 3 is to scan The line is perpendicular to the direction of extrusion movement, and the direction of the illumination area 4 of the light source 2 is parallel to the scanning line 5

[0003] However, this method will cause scratches to be easily missed (the direction of illumination is consistent with the direction of scratches); and because the extrusion is often curved, in the curved area, the camera is easy to lose focus due to the large drop in the scanning area problems, causing small flaws to be missed

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