Elevator rail profile estimation and elevator control method

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(11)

EP 0 503 972 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.12.1992 Bulletin 1992/52

(43)	Date of publication A2:
	16.09.1992 Bulletin 1992/38

(21)	Application number: 92302211.5

(22)	Date of filing: 13.03.1992

(51)	International Patent Classification (IPC)⁵: B66B 1/44, B66B 7/02, B66B 11/02

(84)	Designated Contracting States:
	DE FR GB

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Priority:

13.03.1991 US 668544
13.03.1991 US 668546

(71)	Applicant: OTIS ELEVATOR COMPANY
	Farmington, CT 06032 (US)

(72)	Inventor:
	Roberts, Randall K. Amston, Connected 06231 (US)

(74)	Representative: Tomlinson, Kerry John
	Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)

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References cited: :

(54)	Elevator rail profile estimation and elevator control method

(57) An elevator hoistway rail profile is made during an elevator car learning run by summing (32) a doubly integrated (36) car horizontal acceleration signal with a relative rail-car displacement signal (Xb) and storing the summed signal (XR) according to the vertical position (Y) of the car in the hoistway. Elevator car horizontal vibrations are actively controlled by retrieving data stored in memory indicative of the out-of-straightness of the guide rails.

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