Precise elevator car speed and position system
AssigneeTK Elevator Corporation
InventorMichael Palazzola
Life of this patent
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Abstract
An elevator car positioning system includes a plurality of magnetic field producers, each of the plurality of magnetic field producers located in a position corresponding to an entry/exit point of an elevator. A giant magnetoresistance (GMR) sensor is disposed on an elevator car of the elevator to detect individual ones of the plurality of magnetic field producers when within a given detection range of the GMR sensor and generate detection signals indicative thereof. A controller is in communication with the GMR sensor and is configured to receive the detection signals from the GMR sensor, determine a position of the elevator car relative to the entry/exit point based on the received detection signals, and generate control signals to position the elevator car.
Claims20
An elevator car positioning system, comprising:
- a plurality of magnetic field producers, at least one of the plurality of magnetic field producers located in a position corresponding to each of a plurality of entry/exit point of an elevator system, at least one screw positioned horizontally and at least one screw positioned vertically that are operationally connected with at least one of the plurality of magnetic field producers to enable an X-Y adjustment of the at least one of the plurality of magnetic field producers;
- a giant magnetoresistance (GMR) sensor disposed on an elevator car of the elevator system so as to detect separately individual ones of the plurality of magnetic field producers when within a detection range of the GMR sensor and generate detection signals indicative thereof;
- and
- a controller in communication with the GMR sensor configured to receive the detection signals from the GMR sensor, determine a position of the elevator car relative to the entry/exit point based on the received detection signals, and generate control signals to position the elevator car.
An elevator system, comprising:
- a hoistway comprising a plurality of entry/exit points;
- an elevator car movable within the hoistway;
- a hoisting motor configured to move the elevator car;
- a plurality of magnetic field producers, at least one of the plurality of magnetic field producers located in a position corresponding to each of the plurality of the entry/exit points, at least one screw positioned horizontally and at least one screw positioned vertically that are operationally connected with at least one of the plurality of magnetic field producers to enable an X-Y adjustment of the at least one of the plurality of magnetic field producers;
- a giant magnetoresistance (GMR) sensor disposed on the elevator car so as to separately detect individual ones of the plurality of magnetic field producers when within a given detection range of the GMR sensor and generate detection signals;
- and
- a controller in communication with the GMR sensor and the hoisting motor, the controller configured to receive the detection signals from the GMR sensor, determine a position of the elevator car relative to the entry/exit point based on the received detection signals, and generate control signals to position the elevator car at the entry/exit point via operation of the hoisting motor.
Dependencies are inferred from the claim text.