Detection method for rectangular pin component visual positioning

A pin component and visual positioning technology, which is applied in the detection field of visual positioning of rectangular pin components, can solve the problems of pin breakage and low positioning accuracy.
CN104359402AInactive Publication Date: 2015-02-18NANJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING UNIV OF TECH
Publication Date
2015-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a detection method for rectangular pin component visual positioning, and relates to the field of visual positioning and detection of rectangular pin components. The method aims to solve the problems that a traditional rectangular pin component detection method is low in positioning precision, pins break in images and deviation and deviation angles are detected separately. The method is characterized in that a measured component image is obtained by means of a chip mounter visual system, an image after binary pre-processing is obtained through threshold segmentation, a communication area of the component pins is marked, the shape of the component pins is judged, pixel-level Harris angular point coordinates of the pin image are extracted, sub-pixels of Harris angular points are solved and classified, the deviation angles of components are calculated, the pin image is matched with a standard image, and the deviation of the component is calculated. The method is mainly used for pin detection, deviation angle detection and deviation detection of the rectangular pin components.
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Description

technical field

[0001] The invention relates to the field of visual positioning and detection of rectangular lead components, in particular to a detection method for visual positioning of rectangular lead components. Background technique

[0002] The visual positioning of rectangular lead components is to detect the offset of the component center relative to the nozzle center and the deflection angle of the component during the picking process, so that the servo system can compensate the position of the component. Quickly and accurately completing the alignment of rectangular lead components plays a vital role in improving the work efficiency and precision of the placement machine. The existing detection of rectangular pin components is based on the inchworm creeping algorithm to detect the straight line features that make up the pins, and divides the edge pixel set into subsets with a certain gradient range according to the gradient direction, and then in each edge point su...

Claims

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