Over-acceleration and over-speed detection and processing system

摘要

An elevator system 40 includes an over-acceleration and over-speed protection system capable of triggering a machine room brake and a safety trigger when over-speed or over-acceleration conditions are detected. The system includes a speed detector 42 and an acceleration detector 44. Based upon sensed speed and sensed acceleration, the controller 48 calculates a filtered speed of an elevator mass such as an elevator car 16 or counterweight, and compares the filtered speed to the threshold speed to determine whether an over-speed condition has been reached. The controller 48 activates a machine room brake when an over-speed condition exists, and engages an elevator safety 70A, 70B when it determines that the elevator mass is still in an over-speed condition after the machine room brake has been activated.

主权项

1. A system for detecting and processing over-acceleration and over-speed conditions, the system comprising:
a speed detector configured to monitor a speed of an elevator system mass; an acceleration detector configured to monitor an acceleration of the elevator system mass; and a controller electrically connected to the speed detector and the acceleration detector, the controller configured to: receive a sensed speed of the elevator system mass from the speed detector; receive a sensed acceleration of the elevator system mass from the acceleration detector; calculate a filtered speed of the elevator system mass as a function of the sensed speed and the sensed acceleration; and compare the filtered speed to a threshold speed to determine if the elevator system mass has reached an over-speed condition.