Title:
INFORMATION TRANSMISSION SYSTEM FOR ELEVATOR
Document Type and Number:
Japanese Patent JP2003324403
Kind Code:
A
Abstract:
To provide an information transmission system for an elevator, which is additionally installed even into an existing elevator with a high degree of freedom without limitation caused by a travelling cable.
This system is achieved by using an information transmitting apparatus 5, which applies digital modulation such as multivalued QAM to digital data and transmits the digital data to be multiplexed with a carrier wave of a frequency extremely higher than an intercom speaking voice band, and making a transmission line in a travelling cable 4 common with an intercom speaking voice transmission line.
Inventors:
KONDO YASURO
HATAKEYAMA TOSHIHIKO
KONO KENJI
KAWANISHI SEIJI
YAMAGUCHI SHINICHIRO
ATSUZAWA TERUYOSHI
SUZUKI YASUTAKA
HATAKEYAMA TOSHIHIKO
KONO KENJI
KAWANISHI SEIJI
YAMAGUCHI SHINICHIRO
ATSUZAWA TERUYOSHI
SUZUKI YASUTAKA
Application Number:
JP2002131759A
Publication Date:
November 14, 2003
Filing Date:
May 07, 2002
Export Citation:
Assignee:
HITACHI BUILDING SYS CO LTD
International Classes:
B66B3/00; H04J1/02; (IPC1-7): H04J1/02; B66B3/00
Attorney, Agent or Firm:
Kenjiro Take (2 outside)