Loop transmission system

Abstract

Abstract PURPOSE:To enable to change the location of installation and to increase or decrease the terminal unit easily, by connecting the switch which includes the terminal device in the loop transmission line or separates it, in a series loop at the center concentratedly, and connecting each terminal to the switch individually. CONSTITUTION:The central control unit 29 consists of the central controller 21, transmission circuits 22, 24, reception circuits 23, 25 and change-over switch 31, and a plurality of terminal devices 30 consist of the reception circuit 26, transmission circuit 27, and local controller 28. When each terminal 30 is included in the loop transmission path, by connecting each switch 31 to the transmission line 25a, series connection is made as the transmission of the controller 21, transmission of controller 29, reception and transmission of terminal, reception of controller 29, and reception of controller 21, to form the loop transmission line. If one terminal is separated from the loop transmission line, the switch 31 where the said terminal is connected is connected to the transmission line 22a or 31a, allowing the terminal only detached from the loop and to constitute the loop with the rest of terminals.

Inventors

• 👤 Seitaro Miyajima
• 👤 Kenichiro Kanayama
• 👤 Hiroya Onimaru

Bibliographic Details