Title:
変調後方散乱を用いてのタグ付き資産の所在地推定方法および所在地推定システム
Document Type and Number:
Japanese Patent JP2011518315
Kind Code:
A
Abstract:
Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.
Inventors:
Wild, Ben
Tokachenko, Artem
Lam Chandran, Canaan
Madhau, Upamanu
Tokachenko, Artem
Lam Chandran, Canaan
Madhau, Upamanu
Application Number:
JP2010547599A
Publication Date:
June 23, 2011
Filing Date:
March 14, 2008
Export Citation:
Assignee:
Checkpoint Systems, Incorporated
International Classes:
G01S13/74; G06K17/00; G08B13/22; H04B1/59; H04B7/06; H04B7/08; H04B7/10
Domestic Patent References:
| JP2007170853A | 2007-07-05 | |||
| JP2003185730A | 2003-07-03 | |||
| JP2006105723A | 2006-04-20 | |||
| JP2002271229A | 2002-09-20 | |||
| JP2004354351A | 2004-12-16 | |||
| JP2007114003A | 2007-05-10 | |||
| JPH10206538A | 1998-08-07 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Atsushi Honda
Miho Ikegami
Makoto Onda
Atsushi Honda
Miho Ikegami