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US 5,490,580 AGranted
Automated selection of a load weight bypass threshold for an elevator system
AssigneeOtis Elevator Company
InventorsBruce A. Powell, Joseph C. Walker
Life of this patent
Estimating the term…
Abstract
An automated arrangement selects one of a plurality of load weight bypass thresholds for an elevator car. The selection depends, for example, upon the car direction and the time of day. Alternative embodiments of the arrangement utilize in the selection either actual or estimated elevator car floor space. Fuzzy logic is used to estimate available floor space.
Claims10
An electronic computerized arrangement for selecting an elevator load weight bypass threshold, comprising:
- an electronic computer including a memory;
- a plurality of elevator load weight bypass thresholds stored within said memory;
- and
- instructions for selecting one of said elevator load weight bypass thresholds from among said plurality, the selection being dependent upon a time of day that said instructions are executed by said electronic computer and upon an estimated amount of floor space available within an elevator car, said instructions being stored within said memory, said estimated amount of floor space available corresponding to a point of a fuzzy function, said fuzzy function being stored within said memory, said memory further including instructions for controlling the elevator car to bypass a hall call while a load in the elevator car exceeds a selected one of said elevator load weight bypass thresholds.
1 more element
An electronic computerized method for selecting an elevator load weight bypass threshold, comprising:
- providing an electronic computer having a memory which includes a plurality of elevator load weight bypass thresholds, said memory further including instructions for performing at least steps (i)-(vi) of said method;
- (i) ascertaining a time of day;
- (ii) ascertaining load weights of two elevator cars located at a building lobby;
- (iii) summing the load weights;
- (iv) comparing the resultant sum against a fuzzy function;
- (v) selecting a load weight bypass threshold from among said plurality of thresholds depending upon the result of said comparing step, and
- (vi) controlling at least one of the elevator cars to bypass a hall call while a load in the car exceeds the threshold selected in said (v) selecting step.
4 more elements
Dependencies are inferred from the claim text.