RELATIVE SPEED AND POSITION DETECTION FOR PLURAL ELEVATOR CARS IN SAME HOISTWAY

摘要

First and second hoisting machines are provided with first and second hoisting-machine encoders that detect the ascending/descending speeds and positions of first and second cars, and rotary shafts of first and second speed regulators are provided with firs and second speed-regulator encoders that detect the ascending/descending speeds and positions of the first and second cars as the rotary shafts rotate. The relative ascending/descending speed and relative position of first and second cars are then determined based on the detection results.