EP 2633340 A2 20130904 - SENSOR APPARATUS, IN PARTICULAR METAL SENSOR, WITH A FIELD-COMPENSATED MAGNETIC FIELD SENSOR
Title (en)
SENSOR APPARATUS, IN PARTICULAR METAL SENSOR, WITH A FIELD-COMPENSATED MAGNETIC FIELD SENSOR
Title (de)
SENSORVORRICHTUNG, INSBESONDERE METALLSENSOR, MIT FELDKOMPENSIERTEM MAGNETFELDSENSOR
Title (fr)
DISPOSITIF DÉTECTEUR, EN PARTICULIER DÉTECTEUR DE MÉTAUX COMPRENANT UN DÉTECTEUR DE CHAMP MAGNÉTIQUE À COMPENSATION DE CHAMP
Publication
Application
Priority
- DE 102010043078 A 20101028
- EP 2011066378 W 20110921
Abstract (en)
[origin: WO2012055641A2] The invention relates to a sensor apparatus, in particular a metal sensor, having at least two coils and a magnetic field sensor, in which the arrangement of coils and magnetic sensor with respect to one another and/or the number of coil turns and/or the winding sense of the coils and/or the coil current is/are selected in such a manner that the magnetic field generated by the coils approximately disappears at the location of the magnetic field sensor. The invention also relates to a method for detecting objects, in particular a method for finding metal objects, using at least two coils and a magnetic field sensor, in particular an AMR, GMR or Hall sensor, in which the arrangement of the coils and the magnetic sensor with respect to one another and/or the number of coil turns and/or the winding sense of the coils and/or the coil current is/are selected in such a manner that the magnetic field generated by the coils approximately disappears at the location of the magnetic field sensor.
IPC 8 full level
G01V 3/11 (2006.01)
CPC (source: EP US)
G01R 33/0005 (2013.01 - US); G01V 3/107 (2013.01 - EP US)
Citation (search report)
See references of WO 2012055641A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
DE 102010043078 A1 20120503; CN 103154775 A 20130612; EP 2633340 A2 20130904; US 2013300401 A1 20131114; WO 2012055641 A2 20120503; WO 2012055641 A3 20121018
DOCDB simple family (application)
DE 102010043078 A 20101028; CN 201180052000 A 20110921; EP 11761560 A 20110921; EP 2011066378 W 20110921; US 201113881659 A 20110921