EP 1409962 A2 20040421 - ANGLE MEASUREMENT BY MAGNETIC TRANSDUCER
Title (en)
ANGLE MEASUREMENT BY MAGNETIC TRANSDUCER
Title (de)
MAGNETWANDLER FÜR WINKELMESSUNG
Title (fr)
MESURE D'ANGLE PAR TRANSDUCTEUR MAGNETIQUE
Publication
Application
Priority
- EP 0113698 W 20011121
- GB 0028343 A 20001121
Abstract (en)
[origin: WO0242713A2] A magnetic transducer for measuring the angle about an axis (A-A) of a part such as a shaft (10) is constructed to emanate a magnetic field which is detectable by a fixed sensor (30) to produce a signal which is dependent on the angle. The construction may include a transducer element (20: 70) mounted eccentrically with respect to the axis (A-A) or a magnetically-conductive element (92) having a surface (94) whose radius is a function of angle. Alternatively a part of circular cross-section is given a radial depth (122) of permanent magnetisation which is a function of angle or is provided with a magnetised zone (142') of different magnetic property to the remainder and having a radial depth which is a function of angle. Such a zone may be a case-hardened zone of a steel part. Transducer regions (20, 22) arranged at 90 DEG can be used in resolving ambiguities in the measurement. The transducer region or a magnetically conductive part (112, 114) thereof may provide a cyclic variation of the emanated magnetic field within one revolution of 360 DEG .
IPC 1-7
IPC 8 full level
G01D 5/14 (2006.01); G01D 5/16 (2006.01); G01D 5/20 (2006.01); G01D 5/245 (2006.01)
CPC (source: EP)
G01D 5/145 (2013.01); G01D 5/2006 (2013.01); G01D 5/2033 (2013.01); G01D 5/2452 (2013.01); G01D 2205/73 (2021.05); G01D 2205/777 (2021.05)
Citation (search report)
See references of WO 0242713A2
Citation (examination)
DE 19629611 A1 19980129 - GRUTZECK CHRISTEL [DE]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0242713 A2 20020530; WO 0242713 A3 20020822; AU 3573902 A 20020603; EP 1409962 A2 20040421; GB 0028343 D0 20010103
DOCDB simple family (application)
EP 0113698 W 20011121; AU 3573902 A 20011121; EP 01985823 A 20011121; GB 0028343 A 20001121