EP 1203359 A2 20020508 - SIGNAL PROCESSSING FOR OBJECT DETECTION SYSTEM
Title (en)
SIGNAL PROCESSSING FOR OBJECT DETECTION SYSTEM
Title (de)
SIGNALAUFBEREITUNG FÜR OBJEKTDETEKTIONSYSTEM
Title (fr)
TRAITEMENT DE SIGNAUX POUR SYSTEME DE DETECTION D'OBJET
Publication
Application
Priority
- US 0014509 W 20000525
- US 31819699 A 19990525
- US 34685799 A 19990702
Abstract (en)
[origin: WO0075892A2] Methods and apparatus for detecting objects are disclosed. In one embodiment of the invention, a person entering a secured or "Safe Zone<TM>" is illuminated with low-power polarized radio waves. Differently polarized waves which are reflected back from the person are collected and measured. In a preferred embodiment of the invention, concealed weapons are detected by calculating the difference of a pair of differences between levels of different polarized reflected energy in the time domain, and by using signal processing methods and apparatus to improve the reliability of the detection process. Alternative embodiments of the invention may be used to detect a wide variety of objects other than concealed firearms. The invention may be used for inventory control or to thwart shoplifting.
IPC 1-7
IPC 8 full level
G01S 7/02 (2006.01); G01S 7/41 (2006.01); G01V 3/12 (2006.01); G01S 7/288 (2006.01)
CPC (source: EP)
G01S 7/025 (2013.01); G01S 7/412 (2013.01); G01S 13/887 (2013.01); G01V 3/12 (2013.01); G01S 7/2883 (2021.05)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0075892 A2 20001214; WO 0075892 A3 20010301; AU 7569900 A 20001228; CA 2375435 A1 20001214; CA 2375435 C 20081223; EP 1203359 A2 20020508; EP 1203359 A4 20091125; IL 146734 A0 20020725
DOCDB simple family (application)
US 0014509 W 20000525; AU 7569900 A 20000525; CA 2375435 A 20000525; EP 00964880 A 20000525; IL 14673400 A 20000525