Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-08-03
1994-09-27
Wolfe, Willis R.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
324160, G01P 322
Patent
active
053509552
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.
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patent: 4788497 (1988-11-01), Katsumura
patent: 4839646 (1989-06-01), Tyson
Rockwell International Corporation
Wolfe Willis R.
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