US 11,840,885 B2
Method for detecting an obstacle, electromechanical actuator and closure or solar protection unit
Arnaud Darlot, Cluses (FR); Eric Lagarde, Cluses (FR); Frédéric Maraval, Cluses (FR); and Héléna Robert, Cluses (FR)
Assigned to SOMFY ACTIVITES SA, Cluses (FR)
Appl. No. 17/913,105
Filed by SOMFY ACTIVITES SA, Cluses (FR)
PCT Filed Mar. 19, 2021, PCT No. PCT/EP2021/057120
§ 371(c)(1), (2) Date Sep. 20, 2022,
PCT Pub. No. WO2021/186051, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2002756 (FR), filed on Mar. 20, 2020.
Prior Publication US 2023/0123246 A1, Apr. 20, 2023
Int. Cl. E06B 9/72 (2006.01); H02P 23/00 (2016.01); H02P 23/14 (2006.01); E06B 9/68 (2006.01)
CPC E06B 9/72 (2013.01) [H02P 23/0031 (2013.01); H02P 23/14 (2013.01); E06B 2009/6836 (2013.01); H02P 2207/05 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for detecting an obstacle opposing the movement of a screen in a home automation system for closure or sun protection comprising an electromechanical actuator for driving the movement of the screen, the electromechanical actuator comprising a torque support, a housing, an output shaft, an electric motor comprising a stator and a rotor, the system comprising a winding shaft rotating the screen and a connecting accessory between the output shaft of the electromechanical actuator and the winding shaft, the method comprising the following steps:
a first step of determining a first angular displacement value, of the rotor with respect to the stator of the electromechanical actuator,
a second step of determining a second angular displacement value, of the winding shaft relative to the housing or torque support of the electromechanical actuator,
a third step of converting
(a) the first angular displacement value of the rotor into an equivalent angular displacement data of the winding shaft or
(b) the second angular displacement value of the winding shaft relative to the housing or torque support of the electromechanical actuator into an equivalent angular displacement data of the rotor,
a fourth step of determining an angular deformation of a kinematic chain between the electric motor and the winding shaft by comparing the first angular displacement value determined in the first step to the second angular displacement value determined in the second step,
a fifth step of assessing that an obstacle to the movement of the screen is present if the angular deformation of the kinematic chain determined in the fourth step is greater than a predefined angular deformation threshold value.