Research And Application Of Measuring System In RFID Tag Packing Equipments

RFID(Radio Frequency Identification) tag packaging equipment is the foundation of thefuture internet of things industry,the localization of key technology is of greatsignificance.This thesis discusses the composition of the measuring system in RFID tagpackaging equipment and researches the application of surface measurement and visuallocation technology.This thesis analyses the demand and composition of the measuring system in RFID tagpackaging equipment,points out that the hard core of the measuring system is surfacemeasurement subsystem and visual location subsystem,discusses the function and hardwarestructure of visual location subsystem.We propose a coarse-to-fine self-adaptive measuring method,this method uses a laserscanner for coarse measurement and defines a measure called rectangle index, experimentindicates that the accuracy of this method is0.01mm and it can obtain excellent result.This thesis proposes a optimization algorithm based on NGC(Normalized GrayscaleCorrelation) method,this method have simple computation and high efficiency. We propose achips location algorithm based on bumps recognition,this method using optimizationalgorithm based on SUSAN (Small Univalue Segment Assimilating Nucleus) algorithm tocalculate the center of bumps,it has simple process and not sensitive to large rotation of chips.We tested surface measurement subsystem with dispensing experiment,the resultindicates the consistency of areas of droplets is excellent.We used a calibration target whichhas high accuracy of position and angle to test visual location subsystem,the result shows themark location algorithm’s accuracy reach to15μm and the chip location algorithm’s accuracycan reach to20μm.