| 摘要 |
An elevator system ( 20 ) includes elevator car doors ( 30 ) that are moved by a door mover ( 34 ) between fully open and fully closed positions. An encoder ( 38, 38' ) provides an absolute indication of a current door position. The encoder ( 38, 38' ) also provides a fully closed door position indication that can be used by a machine controller ( 40 ) for controlling when an elevator car ( 22 ) is allowed to move within a hoistway. Using an encoder that provides an absolute door position indication allows for eliminating a separate gate switch that otherwise has been used for providing a fully closed door position indication.
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