A distributed Identification & Charging system based on Database and Photoelectr

AdistributedIdentification&ChargingsystembasedonDatabaseandPhotoelectricsensors，董明，王丰，ThispaperpresentsaninvisiblephotoelectriccardwhichcanreplaceICcardinsomeproperoccasions.Traditionalphotoelectriccardhasvisibleholessothatitiseasilytobe