Measuring elevator position with scanning laser beam

Details Measuring elevator position with scanning laser beam Measuring elevator position with scanning laser beam

1998-11-24

2000-06-27

Salata, Jonathan

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

B66B 134

Patent

active

060795212

ABSTRACT:
A laser disposed on an elevator car is scanned at a uniform rate; one or more pairs of sensors disposed on opposite sides of the hoistway determine the time for the laser to scan from one sensor to the other, from which the vertical distance between the elevator car and a sensor pair is determined, thereby to derive hoistway position, elevator speed and acceleration.

REFERENCES:
patent: 5151562 (1992-09-01), Fujita et al.
patent: 5306882 (1994-04-01), Gerwing et al.
patent: 5393941 (1995-02-01), Mizuno et al.
patent: 5509505 (1996-04-01), Steger et al.
patent: 5869794 (1999-02-01), Speiss

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