Applicant: Mitsubishi Electric Corp, Japan
A brake monitoring system for an elevator is detailed by this patent. The system monitors abrasion of the lining of a brake device. A plurality of detecting elements are inserted into the lining. Each detecting element has a pair of conductive materials (also inserted into the lining), leaving an interval between them. When the lining reaches a prescribed thickness, through the progress of abrasion, each conductive member is exposed from within the lining. When an exposed part of a pair of the conductive members is brought into contact with a rotor, a part between a pair of these members is conductive. A detection signal is generated because these members become conductive.
Patent number: WO/2009/008033
Inventor: A. Chida
Publication date: 15 January 2009
