公开(公告)号：US20170293779A1

公开(公告)日：2017-10-12

申请号：US15626338

申请日：2017-06-19

Applicant: NEC Corporation

Inventor： Wataru HATTORI ,  Keishi OHASHI

IPC: G06K7/10 ,  G06Q10/08

CPC classification number: G06K7/10128 ,  B65G2203/046 ,  G06K7/10316 ,  G06K7/10415 ,  G06Q10/0833 ,  G06Q10/0875

Abstract: An article management system according to the present invention includes: a reader antenna (102) including an open-type transmission line terminated in an impedance matched state; an RF tag (104) that is placed at a location that is electromagnetically coupled to the reader antenna (102) and is visible from the reader antenna (102) in a state where a management target article (105) is placed in the vicinity of the RF tag; a management target article arrangement region in which the management target article (105) is placed, the management target article arrangement region being set in a location where the management target article (105) is electromagnetically coupled to a tag antenna of the RF tag (104); and an RFID reader (103) that sends a transmitted signal to the reader antenna (102) and receives a response signal output from the tag antenna via the reader antenna (102). The presence or absence of the management target article (105) is detected by detecting a change in operating characteristics of the tag antenna due to the management target article based on a change in intensity or phase of a reflected signal from the RF tag (104).