Title:
【発明の名称】一連の独特の性質を持つパルスパターンを用いる位置検出および検査装置
Document Type and Number:
Japanese Patent JPH07509566
Kind Code:
A
Abstract:
An apparatus for position detection using pulse patterns created by use of a fixed disk having three conductive patterns disposed thereon. The first and second patterns are annular conductive paths which are coaxial with respect to one another and the third pattern consists of radially extending conductive portions which are electrically connected to the second pattern. A brush carried by a rotating member whose position is sought to be determined is maintained in contact with the first and third pattern. In this manner an electrical signal variation is encountered as the radially extending conductive portions are encountered by the brush upon rotation thereof. This variation is thus correlated to the pattern defined on the third pattern. A microprocessor is used to add and subtract pulses as the brush is rotated from a reference position. Circumferentially sequential radially extending conductive portions of said third pattern are arranged into subgroups which provide a unique signature corresponding to the respective position. A sorted positional value is updated as rotation is initiated and after sufficient rotation has occurred to identify a subgroup, a comparison is performed to detect the presence of error. If no error is present the position will continue to be updated y adding and subtracting pulses. If an error is detected, the new subgroup and pulse position therein will be accepted as the correct positional value.
Inventors:
Street, thomas
Application Number:
JP50550994A
Publication Date:
October 19, 1995
Filing Date:
August 03, 1993
Export Citation:
Assignee:
Rockwell International Corporation
International Classes:
G01D5/249; G01D5/25; H02K29/06; H02P6/16; (IPC1-7): G01D5/249; G01D5/249; H02K29/06; H02P6/16
Attorney, Agent or Firm:
Akira Asamura (2 outside)