US 11,859,431 B2
Swing door-based entrance system with automatic recognition of linkage reduction
Sven-Gunnar Soderqvist, Vallakra (SE)
Assigned to Assa Abloy Entrance Systems AB, Landskrona (SE)
Appl. No. 17/603,514
Filed by Assa Abloy Entrance Systems AB, Landskrona (SE)
PCT Filed Apr. 22, 2020, PCT No. PCT/EP2020/061202
§ 371(c)(1), (2) Date Oct. 13, 2021,
PCT Pub. No. WO2020/221639, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 1930146-4 (SE), filed on May 2, 2019.
Prior Publication US 2022/0186543 A1, Jun. 16, 2022
Int. Cl. E05F 15/00 (2015.01); E05F 15/63 (2015.01); E05F 15/73 (2015.01)
CPC E05F 15/63 (2015.01) [E05F 15/73 (2015.01); E05Y 2201/41 (2013.01); E05Y 2201/422 (2013.01); E05Y 2400/315 (2013.01); E05Y 2400/456 (2013.01); E05Y 2400/502 (2013.01); E05Y 2400/54 (2013.01); E05Y 2900/134 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An entrance system comprising:
a swing door member having a door leaf, and
a sensor unit mounted to the door leaf, the sensor unit comprising a door angle sensor; and
an automatic door operator having a motor capable of causing movement of the door member, a controller for controlling operation of the motor, and a linkage connected to the automatic door operator and the door leaf for transferring torque generated by the motor to the door leaf,
the automatic door operator being operable in a learn mode and an operational mode, wherein the controller is configured, in the learn mode, to:
automatically establish a linkage reduction curve by determining, for a movement of said door member between a shut closed position of said door leaf and a swung open position of said door leaf, the torque required by said motor to cause movement of said door leaf at different door leaf angles (α), the different door leaf angles being determined from measurement readings of said door angle sensor;
and wherein the controller is configured, in the operational mode, to:
compensate for a non-linear torque transfer characteristic of said linkage by applying the linkage reduction curve to control said motor to cause the door member to swing open.