System and method for determining the availability of an elevato

Details System and method for determining the availability of an elevato System and method for determining the availability of an elevato

1994-01-26

1996-01-30

Wong, Peter S.

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors passengers

187414, 2504951, B66B 300

Patent

active

054874513

ABSTRACT:
A system and method for determining the availability of an elevator car for response to hall calls includes a plurality of infrared sensors disposed to monitor the presence of an object within an elevator car. The cross-sectional area occupied by an object, or objects, within an elevator car is determined by the number of sensors generating output signals based upon reflections of transmitted radiation from such an object. The system monitors the cross-sectional area availability of the elevator car and categorizes the car as to its availability for responding to a hall call.

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