Method and system of reducing false actuation of safety brakes in elevator system
AssigneeOtis Elevator Company
InventorsSandeep Sudi, Joseph Crute, Arthur T. Grondine, Randall S. Dube, Daryl J. Marvin
Life of this patent
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Abstract
A method of avoiding unnecessary safety brake actuation in an elevator system. The method includes determining whether a true overspeed or overacceleration condition of an elevator car is present. The method also includes activating the electronic safety actuator if a true overspeed or overacceleration condition of the elevator car.
Claims20
A method of avoiding unnecessary safety brake actuation in an elevator system, the method comprising:
- determining whether a true overspeed or overacceleration condition of an elevator car is present;
- activating the electronic safety actuator if a true overspeed or overacceleration condition of the elevator car;
- obtaining data with at least one sensor associated with an electronic safety actuator;
- monitoring various operating conditions of the elevator car;
- determining if the electronic safety actuator was activated during the various operating conditions;
- and
- determining if activation of the electronic safety actuator was a false trip.
A method of avoiding unnecessary safety brake actuation in an elevator system, the method comprising:
- determining whether a true overspeed or overacceleration condition of an elevator car is present;
- and
- avoiding activation of the electronic safety actuator if a true overspeed or overacceleration condition of the elevator car is not present.
A method of avoiding inadvertent resetting of a safety brake of an elevator system, the method comprising:
- obtaining data with at least one sensor associated with an electronic safety actuator;
- and
- determining whether resetting of a safety brake is made based on an algorithm that compares the data obtained by the sensor(s) and a threshold condition, resetting of the safety brake occurring if the threshold condition is exceeded for equal to or greater than a predetermined amount of time.
Dependencies are inferred from the claim text.