Patent ID: 11859431
Assignee: ASSA ABLOY ENTRANCE SYSTEMS AB
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 8:
9. A method of operating 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, the entrance system further comprising 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 method involving:
operating the automatic door operator in a learn mode, the learn mode comprising:
controlling said motor to cause movement of said door leaf between a shut closed position of said door leaf and a swung open position of said door leaf;
obtaining measurement readings of said door angle sensor during said movement;
determining different door leaf angles (α) from the obtained measurement readings; and
automatically establishing a linkage reduction curve by determining the torque required by said motor to cause said movement of said door leaf at said different door leaf angles (α); and
operating the automatic door operator in an operational mode, the operating mode comprising:
controlling said motor to cause movement of said door leaf to swing open while applying the linkage reduction curve to compensate for a non-linear torque transfer characteristic of said linkage.