公开(公告)号：US11107034B1

公开(公告)日：2021-08-31

申请号：US16871111

申请日：2020-05-11

申请人： Impinj, Inc.

发明人： Alberto Pesavento ,  Adrian Wojnowski ,  Joshua F. Ensworth

IPC分类号： G06Q30/00 ,  G06Q10/08 ,  G06K7/10

摘要： Portals and other chokepoints can be monitored with RFID reader systems. A portion of an RFID reader system capable of generating multiple beams can be mounted between two adjacent chokepoints such that some beams are associated with one chokepoint while other beams are associated with the other chokepoint. When replies from an item are received, the item can be associated with a chokepoint based on parameters or characteristics associated with the replies and/or the beam(s) on which the replies are received. If the detected item is moving, its movement direction through the chokepoint and/or its movement speed may also be determined.

公开(公告)号：US11797813B1

公开(公告)日：2023-10-24

申请号：US16868561

申请日：2020-05-07

申请人： Impinj, Inc.

发明人： Joshua F. Ensworth ,  Alberto Pesavento ,  Harley K. Heinrich ,  Theron Stanford ,  Thomas G. Anderl

IPC分类号： G06K19/07 ,  G06K7/00 ,  G06K7/10

CPC分类号： G06K19/0723 ,  G06K7/0008 ,  G06K7/10297

摘要： RFID tag ICs in a population can adjust the impedance values used to backscatter-modulate reply signals to increase the distribution or spread of backscattered signal parameters, thereby facilitating the recovery of collided tag replies. An RFID tag IC may adjust its impedance value(s) based on a reader command or independently.

公开(公告)号：US10650346B1

公开(公告)日：2020-05-12

申请号：US16137555

申请日：2018-09-21

申请人： Impinj, Inc.

发明人： Alberto Pesavento ,  Adrian Wojnowski ,  Joshua F. Ensworth

IPC分类号： G06Q30/00 ,  G06Q10/08 ,  G06K7/10

摘要： Portals and other chokepoints can be monitored with RFID reader systems. A portion of an RFID reader system capable of generating multiple beams can be mounted between two adjacent chokepoints such that some beams are associated with one chokepoint while other beams are associated with the other chokepoint. When replies from an item are received, the item can be associated with a chokepoint based on parameters or characteristics associated with the replies and/or the beam(s) on which the replies are received. If the detected item is moving, its movement direction through the chokepoint and/or its movement speed may also be determined.