Global Patent Index - EP 1007909 A1

EP 1007909 A1 2000-06-14 - MAGNETIC RESONANCE SENSOR

Title (en)

MAGNETIC RESONANCE SENSOR

Title (de)

MAGNETISCHER RESONANZSENSOR

Title (fr)

DETECTEUR A RESONANCE MAGNETIQUE

Publication

EP 1007909 A1 (DE)

Application

EP 96946119 A

Priority

DE 9602513 W

Abstract (en)

[origin: WO9829712A1] The invention relates to a sensor sensitive to a magnetic field, the output signal of which makes it possible to obtain simultaneously information about the distance, rotational speed (number of rotations) and direction of rotation of a magnetic field. The magnetic field can be generated by a permanent magnet and/or by the action of an electric current. The aim of the invention is to develop a sensor, the operating frequency of which markedly exceeds the state-of-the-art cut-off frequency fGr for magnetic sensors having bistable magnetic elements (BME) as core, and whose output signal simultaneously contains information about the distance, number of rotations and direction of rotation of a magnetic field. Since the cut-off frequency fGr of the large Barkhausen effect (LBE) is determined by objective physical processes, a different principle of physics must be used for the sensor function described in the present invention. The magnetic resonance sensor differs in its function from other sensors sensitive to magnetic fields, which also utilize a resonant circuit, in that it uses a BME as core of the sensor coil and that it offers the possibility to measure simultaneously the number of rotations, distance and direction of rotation.

IPC 1-7 (main, further and additional classification)

G01D 5/20; G01V 3/10

IPC 8 full level (invention and additional information)

G01P 3/481 (2006.01); G01D 5/20 (2006.01); G01P 3/487 (2006.01); G01R 33/02 (2006.01); G01V 3/10 (2006.01)

CPC (invention and additional information)

G01V 3/105 (2013.01); G01D 5/2013 (2013.01)

Citation (search report)

See references of WO 9829712A1

Designated contracting state (EPC)

AT BE CH DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9829712 A1 19980709; EP 1007909 A1 20000614; JP 2001527641 A 20011225; US 6304075 B1 20011016

INPADOC legal status


2003-07-23 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020102

2002-07-10 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) DELETED

- Ref Legal Event Code: DAX

2000-06-14 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-06-14 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL PAYMENT 19990730;LT PAYMENT 19990730;LV PAYMENT 19990730;RO PAYMENT 19990730;SI PAYMENT 19990730