Elevator car control in a landing zone using a machine brake in response to undesired car movement

摘要

An exemplary method is useful for controlling movement of an elevator car in an elevator system that includes a machine that selectively moves the elevator car and a machine brake that selectively resists movement of the elevator car. The method includes determining whether the elevator car is near a landing and determining whether a door of the elevator car is open. A desired operation includes desired movement of the elevator car while the elevator car is near the landing and the door is open. A determination is made whether the elevator car moves other than according to the desired movement. The machine brake is applied for stopping movement of the elevator car responsive to elevator car movement other than the desired movement while the elevator car is near the landing and the door is open.

主权项

1. A method of controlling movement of an elevator car in an elevator system that includes a machine for moving the elevator car and a machine brake for preventing movement of the elevator car, the method comprising the steps of:
determining whether the elevator car is near a landing; determining whether a door of the elevator car is open; performing a desired operation that includes desired movement of the elevator car while the elevator car is near the landing and the door is open; determining whether the elevator car moves other than according to the desired movement; and stopping movement of the elevator car by applying the machine brake responsive to elevator car movement other than the desired movement while the elevator car is near the landing and the door is open, wherein the desired operation comprises departing from the landing before the door has closed.