ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,703,605, issued on Aug. 11, was assigned to Otis Elevator Co. (Farmington, Conn.).
"Self-checking device and method for braking device and elevator system" was invented by Guosong Li (Tianjin, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A self-checking device and method for an elevator braking device and an elevator system. The self-checking device includes an inductance testing module configured to measure an electromagnetic brake coil inductance L of the braking device; and a processing module electrically connected to the inductance testing module, and storing a mathematical model of an air gap a between the movable plate and the static plat...