US 12,304,775 B2
Method and an elevator system for performing a synchronization run of an elevator car
Ari Jussila, Helsinki (FI); Toni Hirvonen, Helsinki (FI); Ari Kattainen, Helsinki (FI); and Antti Hovi, Helsinki (FI)
Assigned to Kone Corporation, Helsinki (FI)
Filed by Kone Corporation, Helsinki (FI)
Filed on Aug. 2, 2019, as Appl. No. 16/530,001.
Application 16/530,001 is a continuation of application No. PCT/EP2018/053409, filed on Feb. 12, 2018.
Claims priority of application No. 17155574 (EP), filed on Feb. 10, 2017.
Prior Publication US 2019/0352130 A1, Nov. 21, 2019
Int. Cl. B66B 1/34 (2006.01); B66B 5/00 (2006.01); B66B 7/12 (2006.01)
CPC B66B 1/3492 (2013.01) [B66B 1/3446 (2013.01); B66B 5/0031 (2013.01); B66B 7/123 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for performing a synchronization run of an elevator car stopped between floors, the method comprising:
upon initiating the synchronization run, driving the elevator car at a low speed in an elevator shaft,
detecting a first magnet fixed to the elevator shaft,
comparing an identification code of the detected first magnet to stored pre-information to identify the detected first magnet,
in response to identification of the detected first magnet, generating a control signal to the elevator car to raise elevator speed,
continuously obtaining pulse position information of the elevator car, and
defining absolute position information of the elevator car by adding a predefined correction value to the obtained pulse position information of the elevator car, wherein the predefined correction value indicates drift between the obtained pulse position information of the elevator car and actual pulse position of the elevator car.