US 12,280,987 B2
Device and method for monitoring an elevator system
Derk Oscar Pahlke, Berlin (DE); Tadeusz Pawel Witczak, Farmington, CT (US); Craig Drew Bogli, Avon, CT (US); and Yrinee Michaelidis, Farmington, CT (US)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Dec. 3, 2019, as Appl. No. 16/702,047.
Claims priority of application No. 18209794 (EP), filed on Dec. 3, 2018.
Prior Publication US 2020/0172373 A1, Jun. 4, 2020
Int. Cl. B66B 5/00 (2006.01); B66B 1/34 (2006.01); B66B 13/02 (2006.01)
CPC B66B 5/0018 (2013.01) [B66B 1/3492 (2013.01); B66B 13/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of calibrating a monitoring device (20) for monitoring movement of an elevator car (10) of an elevator system (2) configured for traveling between a plurality of floors (8a, 8b, 8c), wherein the method comprises:
detecting a travel time (Δtk) between a starting time (tk) and a stopping time (t′k) as well as acceleration (a(t)) of elevator car (10);
determining a velocity (v (t)) of the elevator car (10) by integrating the detected acceleration (a(t)) with respect to the detected travel time (Δtk);
determining a travel distance of the elevator car (10) by integrating the determined velocity (v(t)) with respect to the detected travel time (Δtk);
correlating the determined travel distance (sk) with the detected travel time (Δtk) to form a pair of travel time and travel distance;
storing the pair of travel time and travel distance (Δtk,sk) as part of a travel profile (34); and
determining a position of at least one door (12) of the elevator car (10) and setting the velocity (v(t)) of the elevator car (10) to zero any time the at least one door (12) is determined as not being completely closed.