Patent ID: 7562747
Filing Date: 2009-07-21
Classification: B66B

Abstract:
1. An elevator installation having at least one car and at least one device for determining a position of the car, the position determining device comprising: a code mark pattern arranged along a length of a path of travel of the car and being formed from a plurality code marks arranged in a single line; a sensor device mounted on the car for scanning said code marks contactlessly with a plurality of sensors, said sensors being arranged in at least two groups for scanning said code marks redundantly and generating a signal from each group representing the scanned code mark pattern, and wherein said at least two sensor groups are separated from each other by a predetermined distance perpendicular to the line of said code marks and wherein said sensors of at least one of said at least two sensor groups are arranged in two sensor lines running parallel to the line of said code marks; and an analyzer connected to said sensor device for analyzing said signals generated by said sensor device to determine a current position of the car.