Browse Prior Art Database

Smart Building Sensor for Elevator Traffic Management

IP.com Disclosure Number: IPCOM000018939D
Original Publication Date: 2003-Aug-21
Included in the Prior Art Database: 2003-Aug-21
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Abstract

This article describes a means for managing the operation of elevators, so that crowded elevator cars do not respond to external calls unless a high likelihood exists that the elevator may accommodate the queued potential passengers.

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Smart Building Sensor for Elevator Traffic Management

Most modern elevator traffic management systems have limited "traffic management intelligence", generally by way of preprogramming certain elevator movements based on prior trends. While this logic provides advantages, it addresses only general trends, and does not respond in any manner to real-time elevator usage. A need thus arises for real-time intelligence in elevator management systems whereby elevator behavior is modified as changes in usage dictate. The specific problem addressed by the following solutions is that of a crowded elevator car, moving from high floors to low floors or vice versa, stops due to external calls on intermediate floors.

Three methods of overcoming this problem exist. First, a passenger counting system may be used, in which a sensor counts the number of incoming passengers. Once the number of passengers present in the car exceeds a threshold value, the car will stop responding to external calls from intermediate floors.

A second option is considered whereby a calculation of floor space used versus floor space available is the determinate factor as to when the elevator car is at capacity. In this environment an overhead optical imaging system could, at each passenger pick-up stop, compare the current floor space usage with a baseline of unoccupied floor space and do a simple grid analysis to determine percentage of floor space used. This percentage would then be the driver of the capacity decision, such that, if the car floor is covered above some PercentageThreshold, e.g., 70%, the car is considered "at capacity." The baseline coul...