Movable barrier operator auto-force setting method and...

Details Movable barrier operator auto-force setting method and... Movable barrier operator auto-force setting method and...

E - Fixed Constructions

05

F

E05F 15/20 (2006.01) E05F 15/10 (2006.01)

Patent

CA 2729357

A movable barrier operator having a motor controller (10) and motor (11) that control selective movement of a movable barrier (12) also has an obstacle detector (14) that utilizes an automatically determined excess force threshold value to permit reliable detection of an obstacle under a wide variety of operational circumstances, including changing physical circumstances, aging components, temperature variations, and motor runtime. In a preferred embodiment, a characteristic force value for the system is frequently updated as a function of actual measured force requirements (and further compensated, pursuant to various embodiments, with respect to other conditions such as temperature and motor runtime). This characteristic force value is then utilized to determine the excess force threshold value.

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