SE9903693D0 - Sensor, method and system for remote detection of objects - Google Patents

Sensor, method and system for remote detection of objects

Info

Publication number
SE9903693D0
SE9903693D0 SE9903693A SE9903693A SE9903693D0 SE 9903693 D0 SE9903693 D0 SE 9903693D0 SE 9903693 A SE9903693 A SE 9903693A SE 9903693 A SE9903693 A SE 9903693A SE 9903693 D0 SE9903693 D0 SE 9903693D0
Authority
SE
Sweden
Prior art keywords
magnetic field
magnetic
component
sensor
invariant
Prior art date
Application number
SE9903693A
Other languages
Swedish (sv)
Other versions
SE521229C2 (en
SE9903693L (en
Inventor
Carl Tyren
Original Assignee
Rso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rso Corp filed Critical Rso Corp
Priority to SE9903693A priority Critical patent/SE521229C2/en
Publication of SE9903693D0 publication Critical patent/SE9903693D0/en
Publication of SE9903693L publication Critical patent/SE9903693L/en
Publication of SE521229C2 publication Critical patent/SE521229C2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

The respective sensor element is momentarily exposed to resulting magnetic field without magnetic-invariant component. The orientation of that sensor element is determined from orientation of magnetic-invariant component of magnetic field (Hbias) when frequency shift occurs. The electromagnetic signals are generated by magnetic elements for exciting sensor elements provided at each object (20). An electromagnetic reply signal is generated from each sensor element, that is modulated by magnetic field (Hmod) having magnitude-variant (AC) and magnitude-invariant (DC) component. The magnetic field (Hbias) with rotating field vector is generated to detect frequency shift in component of reply signal when magnitude-invariant component of magnetic field (Hbias) balances the magnetic-invariant component of magnetic field (Hmod). Independent claims are also included for the following: (a) sensor; (b) remote detection system of objects
SE9903693A 1999-10-14 1999-10-14 Remote detection method of objects such as price labeling of commercial articles SE521229C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9903693A SE521229C2 (en) 1999-10-14 1999-10-14 Remote detection method of objects such as price labeling of commercial articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9903693A SE521229C2 (en) 1999-10-14 1999-10-14 Remote detection method of objects such as price labeling of commercial articles

Publications (3)

Publication Number Publication Date
SE9903693D0 true SE9903693D0 (en) 1999-10-14
SE9903693L SE9903693L (en) 1999-12-19
SE521229C2 SE521229C2 (en) 2003-10-14

Family

ID=20417347

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9903693A SE521229C2 (en) 1999-10-14 1999-10-14 Remote detection method of objects such as price labeling of commercial articles

Country Status (1)

Country Link
SE (1) SE521229C2 (en)

Also Published As

Publication number Publication date
SE521229C2 (en) 2003-10-14
SE9903693L (en) 1999-12-19

Similar Documents

Publication Publication Date Title
CA2438423A1 (en) Method and apparatus for detection and measurement of accumulations of magnetic particles
SE9700541D0 (en) Sensor and method for contactless detection of objects
SE9802221L (en) Sensor, method and system for remote detection of objects
CA2295047A1 (en) Position detector
EP0780704A3 (en) Plural frequency method and system for identifying metal objects in a background environment
EP0782012A3 (en) Plural frequency method and system for identifying metal objects in a background environment using a target model
EP0880035A3 (en) Magnetic metal sensor and method for detecting magnetic metal
CA2373688A1 (en) Measurement of magnetic fields
DE69015668D1 (en) Transmission theft shoplifting detection system.
EP0987522A3 (en) Method of and apparatus for generating a pulse signal
KR101670427B1 (en) High sensitive metal detecting apparatus with noise immunity
RU95111380A (en) High frequency error signal tapping from high frequency electromagnetic field of powerful electric machine
SE9903693D0 (en) Sensor, method and system for remote detection of objects
SE9902173L (en) Method, system and sensors for remote detection of objects, and method for determining the length of a magnetic element
JP2000056032A (en) Metal detecting device
SE9704860D0 (en) Method and apparatus for detecting phase difference
JPH0424471Y2 (en)
CA2415875A1 (en) A magnetomechanical electronic article surveillance system and method using sideband detection
EP0987523A3 (en) Apparatus for and method of generating a pulse signal
KR100438211B1 (en) Apparatus for searching pieces of metal and method thereof
JPS6365910B2 (en)
JPS54144607A (en) Position detecting system of linear car
SE9601358L (en) Method and apparatus for deactivating alarm elements
JPS57163887A (en) Detector for metallic piece residing in paper, etc.
EP1065529A3 (en) Method of detecting foreign matter and apparatus therefor

Legal Events

Date Code Title Description
NUG Patent has lapsed
NUG Patent has lapsed