Title (en)

ANGLE ENCODER

Title (de)

WINKELKODIERER

Title (fr)

CODEUR D'ANGLE

Publication

EP 1108198 A4 20020911 (EN)

Application

EP 99932550 A 19990721

Priority

• AU 9900590 W 19990721
• AU PP482598 A 19980724

Abstract (en)

[origin: WO0006973A1] An angular position sensor comprising a body (1) rotatable about an axis of rotation (8) fixed with respect to a surrounding housing (5). The body having a grating element (2) comprising a surface of revolution about the axis of rotation. The surface comprising a pseudo-random distribution of regions of high (21) and low (22) EMR reflectivity arranged in the form of endless succession of individual binary bar codes. The sensor having an EMR source (10) and an array of EMR sensitive detectors (9) fixed with respect to the housing. The source irradiating the surface and the array receiving incident reflected EMR. A pattern produced by incident EMR on the array resulting from the alternate regions of low and high reflectivity on the surface. The pattern processed by a processor (11) to derive the absolute angular position of the regions with respect to the housing, providing a measure of the absolute angular position of the rotatable body with respect to the housing.

IPC 1-7

G01D 5/38; G01D 5/34; G01D 5/347

IPC 8 full level

G01D 5/30 (2006.01); G01D 5/347 (2006.01)

CPC (source: EP KR US)

G01D 5/2454 (2013.01 - EP US); G01D 5/3473 (2013.01 - EP); G01D 5/34792 (2013.01 - EP KR US); G01D 5/38 (2013.01 - KR)

Citation (search report)

• [X] WO 9325865 A1 19931223 - BOOTSMAN HOLDING BV [NL], et al
• [A] EP 0377097 A1 19900711 - DAIMLER BENZ AG [DE]
• [A] DE 19638912 A1 19980326 - TEVES GMBH ALFRED [DE]
• See references of WO 0006973A1

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 0006973 A1 20000210; AU PP482598 A0 19980813; BR 9912682 A 20020326; CA 2338637 A1 20000210; CN 1175249 C 20041110; CN 1311852 A 20010905; EP 1108198 A1 20010620; EP 1108198 A4 20020911; JP 2002521684 A 20020716; KR 100571346 B1 20060414; KR 20010074741 A 20010809; MX PA01000833 A 20020604

DOCDB simple family (application)

AU 9900590 W 19990721; AU PP482598 A 19980724; BR 9912682 A 19990721; CA 2338637 A 19990721; CN 99809141 A 19990721; EP 99932550 A 19990721; JP 2000562720 A 19990721; KR 20017000953 A 20010122; MX PA01000833 A 19990721