×

Elevator installation with a measuring system for determining absolute car position

  • US 6,874,244 B2
  • Filed: 01/29/2004
  • Issued: 04/05/2005
  • Est. Priority Date: 07/31/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A position measuring system for an elevator installation for determining a position of an elevator car movable along at least one guide rail, comprising:

  • a strip having a code mark pattern and adapted to be mounted near the elevator car and parallel to a travel direction of the elevator car;

    a code reading device adapted to be mounted on the elevator car for contactless scanning of said code mark pattern; and

    an evaluating unit connected to said code reading device for evaluating said scanned code mark pattern, wherein “

    n”

    successive code marks of said code mark pattern form a code word, a plurality of different ones of said code words are unambiguously arranged in an n-digit pseudo random sequence, said code words form a single-track of said code mark pattern and that each said code word represents an absolute car position.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×