Global Patent Index - EP 1108198 A4

EP 1108198 A4 2002-09-11 - ANGLE ENCODER

Title (en)

ANGLE ENCODER

Title (de)

WINKELKODIERER

Title (fr)

CODEUR D'ANGLE

Publication

EP 1108198 A4 (EN)

Application

EP 99932550 A

Priority

  • AU 9900590 W
  • AU PP482598 A

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 (main, further and additional classification)

G01D 5/38; G01D 5/34; G01D 5/347

IPC 8 full level (invention and additional information)

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

CPC (invention and additional information)

G01D 5/2454 (2013.01); G01D 5/3473 (2013.01); G01D 5/34792 (2013.01)

Citation (search report)

Designated contracting state (EPC)

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

EPO simple patent family

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; MX PA01000833 A 20020604

INPADOC legal status


2007-05-02 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20061011

2002-09-11 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20020730

2002-09-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

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

2002-09-11 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7G 01D 5/38 A, 7G 01D 5/34 B, 7G 01D 5/347 B

2002-01-30 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: EISENHAUER, KARL, YARNOS

2002-01-30 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: BAXTER, JOHN

2001-06-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010220

2001-06-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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