Elevator system
First Claim
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1. An elevator system for serving calls for elevator service in a building having a plurality of floors, comprising:
- a plurality of elevator cars,call means for registering calls for elevator service,means for timing at least certain of the calls for elevator service from registration until service thereof,dispatcher means for distributing the calls for elevator service among the in-service elevator cars according to a predetermined group operating strategy,and monitoring means for monitoring the calls for elevator service to detect a malfunction of said dispatcher means,said monitoring means including means for determining a dynamic threshold value for at least certain of the monitored calls, with said threshold value being responsive to at least one predetermined system parameter,said monitoring means initiating a predetermined corrective modification of the elevator system in response to the call registration time of a monitored call exceeding the determined dynamic threshold value for the call.
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Abstract
An elevator system having a plurality of cars under group supervisory control by a programmable dispatcher. A monitor detects dispatcher failure via a plurality of tests which includes timing each hall call, and performing predetermined checks, tests and comparisons for each call related to actual system operating conditions.
22 Citations
28 Claims
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1. An elevator system for serving calls for elevator service in a building having a plurality of floors, comprising:
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a plurality of elevator cars, call means for registering calls for elevator service, means for timing at least certain of the calls for elevator service from registration until service thereof, dispatcher means for distributing the calls for elevator service among the in-service elevator cars according to a predetermined group operating strategy, and monitoring means for monitoring the calls for elevator service to detect a malfunction of said dispatcher means, said monitoring means including means for determining a dynamic threshold value for at least certain of the monitored calls, with said threshold value being responsive to at least one predetermined system parameter, said monitoring means initiating a predetermined corrective modification of the elevator system in response to the call registration time of a monitored call exceeding the determined dynamic threshold value for the call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification