JPS57129039A - Multiplex transmission system - Google Patents

Multiplex transmission system

Info

Publication number
JPS57129039A
JPS57129039A JP1426681A JP1426681A JPS57129039A JP S57129039 A JPS57129039 A JP S57129039A JP 1426681 A JP1426681 A JP 1426681A JP 1426681 A JP1426681 A JP 1426681A JP S57129039 A JPS57129039 A JP S57129039A
Authority
JP
Japan
Prior art keywords
signal
transmission line
signals
local
optical signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1426681A
Other languages
Japanese (ja)
Inventor
Tetsuo Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1426681A priority Critical patent/JPS57129039A/en
Publication of JPS57129039A publication Critical patent/JPS57129039A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To transmit plural signals by one transmission line, by mixing and receiving each transmitting signal from a local station, and decoding it to a signal of each local station. CONSTITUTION:Sensors T1-T3 installed on a job site are connected to local stations A1-A3. Data from the sensors T1-T3 are digitized through light emission elements E1-E3, respectively, and are outputted to an optical transmission line OP as optical signals a1, a2 and a3. Transmission of the optical signals a1, a2 and a3 is started when a synchronizing signal (b) sent out periodically through a light emission element E0 from a host station B has been received by the side of the local stations through photodetecting elements R1-R3. The transmitted optical signals a1-a3 are mixed in the transmission line OP, become a signal (w), which proceeds in the transmission line OP, reaches a photodetecting element R0 and is caught. The host station B decodes the signal (w) to the original signals a1, a2 and a3 again.
JP1426681A 1981-02-04 1981-02-04 Multiplex transmission system Pending JPS57129039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1426681A JPS57129039A (en) 1981-02-04 1981-02-04 Multiplex transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1426681A JPS57129039A (en) 1981-02-04 1981-02-04 Multiplex transmission system

Publications (1)

Publication Number Publication Date
JPS57129039A true JPS57129039A (en) 1982-08-10

Family

ID=11856283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1426681A Pending JPS57129039A (en) 1981-02-04 1981-02-04 Multiplex transmission system

Country Status (1)

Country Link
JP (1) JPS57129039A (en)

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