US 11,851,936 B2
System and method for movable barrier monitoring
Casparus Cate, Lombard, IL (US); James Joseph Fitzgibbon, Batavia, IL (US); Thomas J. Grinter, Wheaton, IL (US); Anders K. Melberg, Lindenhurst, IL (US); and Robert John Olmsted, Wood Dale, IL (US)
Assigned to The Chamberlain Group LLC, Oak Brook, IL (US)
Filed by The Chamberlain Group LLC, Oak Brook, IL (US)
Filed on Aug. 13, 2020, as Appl. No. 16/992,653.
Claims priority of provisional application 62/924,861, filed on Oct. 23, 2019.
Claims priority of provisional application 62/887,299, filed on Aug. 15, 2019.
Prior Publication US 2021/0047873 A1, Feb. 18, 2021
Int. Cl. E05F 15/40 (2015.01); G07C 9/00 (2020.01); E05F 15/686 (2015.01); E06B 9/70 (2006.01); E06B 3/48 (2006.01); E06B 3/70 (2006.01)
CPC E05F 15/686 (2015.01) [G07C 9/00896 (2013.01); E05Y 2400/30 (2013.01); E05Y 2400/52 (2013.01); E05Y 2900/106 (2013.01); E05Y 2900/11 (2013.01); E06B 3/485 (2013.01); E06B 9/70 (2013.01); E06B 2003/7044 (2013.01); G07C 2009/00928 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A movable barrier operator system comprising:
a motor configured to turn a drum in a first direction to wind up a cable on the drum and move a door connected to the cable from a closed position toward an open position, the motor configured to turn the drum in an opposite, second direction to pay out the cable from the drum and permit the door to move from the open position toward the closed position;
a memory configured to store an expected variable of the door associated with acceptable movement of the door from the open position toward the closed position;
a sensor configured to directly sense a portion of the door;
communication circuitry to receive a close command;
a processor circuit operatively coupled to the motor, the memory, the sensor, and the communication circuitry, the processor circuit configured to cause the motor to turn the drum in the second direction to pay out the cable and permit the door to move from the open position toward the closed position upon the communication circuitry receiving the close command;
the processor circuit configured to determine, via the sensor directly sensing the portion of the door, a first position of the portion of the door and a second position of the portion of the door as the motor turns the drum in the second direction to permit the door to move from the open position toward the closed position;
the processor circuit configured to use the sensor to estimate an actual variable of the door based upon a difference between the first position and the second position of the portion of the door:
the processor circuit configured to determine whether the actual variable is acceptable based at least in part on the processor circuit causing the motor to turn the drum in the second direction to pay out the cable and the expected variable of the door; and
the processor circuit configured to change operation of the motor upon the actual variable of the door determined to be unacceptable.