US 9,809,421 B2
Elevator cord health monitoring
Fanping Sun, Glastonbury, CT (US); Xiaodong Luo, South Windsor, CT (US); Daniel A. Mosher, Glastonbury, CT (US); Huan Zhang, Glastonbury, CT (US); John P. Wesson, West Hartford, CT (US); Yan Chen, South Windsor, CT (US); Mark Steven Thompson, Tolland, CT (US); Raja Kountanya, Manchester, CT (US); and Richard N. Fargo, Plainville, CT (US)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Appl. No. 14/768,667
Filed by OTIS ELEVATOR COMPANY, Farmington, CT (US)
PCT Filed Feb. 21, 2013, PCT No. PCT/US2013/027013
§ 371(c)(1), (2) Date Aug. 18, 2015,
PCT Pub. No. WO2014/130028, PCT Pub. Date Aug. 28, 2014.
Prior Publication US 2016/0002006 A1, Jan. 7, 2016
Int. Cl. B66B 7/06 (2006.01); B66B 7/12 (2006.01); B66B 5/00 (2006.01); G01R 17/00 (2006.01); G01R 31/12 (2006.01); B66B 9/00 (2006.01)
CPC B66B 7/1223 (2013.01) [B66B 9/00 (2013.01); G01R 17/00 (2013.01); G01R 31/12 (2013.01); D07B 2301/307 (2013.01); D07B 2301/45 (2013.01); D07B 2501/2007 (2013.01)] 21 Claims
OG exemplary drawing
 
14. An elevator system comprising:
an elevator car;
one or more sheaves;
a belt or rope comprising a plurality of wires arranged into a plurality of cords for supporting and/or driving the elevator car routed across the one or more sheaves and operably connected to the elevator car, the plurality of cords interconnected to form a bridge circuit, at least two legs of the bridge circuit comprising separate and distinct cords of the plurality of cords;
wherein each leg of the bridge circuit is configured as an LCR circuit allowing for measurement of complex impedance of the legs of the bridge circuit.