Patch element positioning identification method based on minimum enclosing rectangle

Abstract

The invention discloses a patch element positioning identification method based on a minimum enclosing rectangle.The method is used for obtaining the center and the deviation angle of an element and comprises the following steps of 1, conducting image segmentation and provincial characteristic extraction on the patch element; 2, dividing the patch element into two categories, namely the element without pins and the element with pins; 3, according to the characteristic of the minimum enclosing rectangle, obtaining central coordinates of the rectangle; 4, according to the geometric center of a target area obtained in step 3, namely the geometric center of the element without the pins, and then according to the length of limited edges of the rectangle, screening the two symmetrical long edges of the rectangle, wherein the mean angle corresponding to the slope of the rectangle is considered as the deviation angle of the element; 5, adopting the same practice, and according to the geometric center of the target area, obtaining the geometric center corresponding to each pin of the element with the pins; 6, according to the obtained central coordinates of the pin position of the element with the pins, obtaining the actual central coordinates of the element; 7, obtaining the deviation angle of the patch element with the pins.By means of the patch element positioning identification method, the center and the deviation angle of the element can be obtained rapidly and precisely.

Description

Technical field [0001] The present invention relates to a visual inspection method for components without pins and components with pins in a surface mount technology (SMT) vision system. The present invention specifically relates to a positioning recognition method based on a minimum circumscribed rectangle to obtain components without pins and with tubes The center and deflection angle of the foot element. Background technique [0002] When the placement machine sucks and sticks components, due to the transportation of the components, the suction of the components, the mechanical positioning of the suction nozzle, and the pneumatic suction, two key problems may arise: one is the difference between the center of the suction component and the center of the suction nozzle. Coincidence; Second, there is an angular deviation between the pick-up position of the component and the target placement position. This will have a serious impact on the accurate placement of components, so pos...

AI Technical Summary

Problems solved by technology

[0002] When the placement machine sucks and pastes the components, due to the transportation of the components, the suction of the components, the mechanical positioning of the suction nozzle, the pneumatic suction and other actions, there may be two key problems: one is that the center of the sucked component is different from the center of the suction nozzle. Coincidence; Second, there is an angular deviation between the pick-up position of the component and the target placement position

Images