[go: up one dir, main page]

JPS5724132A - Power line data transmission system - Google Patents

Power line data transmission system

Info

Publication number
JPS5724132A
JPS5724132A JP10013180A JP10013180A JPS5724132A JP S5724132 A JPS5724132 A JP S5724132A JP 10013180 A JP10013180 A JP 10013180A JP 10013180 A JP10013180 A JP 10013180A JP S5724132 A JPS5724132 A JP S5724132A
Authority
JP
Japan
Prior art keywords
channel
power line
noise
output
counters
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.)
Granted
Application number
JP10013180A
Other languages
Japanese (ja)
Other versions
JPS615298B2 (en
Inventor
Katsuyuki Machino
Tsuguhiko Tanaka
Masahiro Ise
Takaaki Okamoto
Chuji Suzuki
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP10013180A priority Critical patent/JPS5724132A/en
Publication of JPS5724132A publication Critical patent/JPS5724132A/en
Publication of JPS615298B2 publication Critical patent/JPS615298B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To increase the reliability, by providing a circuit selecting channels without any synchronizing noise. CONSTITUTION:Channel pulses obtained by dividing one cycle of the power supply frequency by a factor of n by from a channel pulse generator 1 is generated at output terminals T0-Tn. The number of noises of each channel is counted based on the output of a noise detector 4 and each channel pulse through counters 7-0-7-n. The content of counters is judged by a numeral comparison selector 9 and a channel with least noise number is selected, and the number of this channel is stored for a fixed time with a latch 10. At transmission, a changeover switch 3 is switched to 3B side and channel pulses picked up by a multiplexer 11 and transmission data are applied to an AND gate 12 based on the channel nember stored. The output of the AND gate 12 is applied to a data transmitter and transmitted to a power line 2.
JP10013180A 1980-07-21 1980-07-21 Power line data transmission system Granted JPS5724132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10013180A JPS5724132A (en) 1980-07-21 1980-07-21 Power line data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10013180A JPS5724132A (en) 1980-07-21 1980-07-21 Power line data transmission system

Publications (2)

Publication Number Publication Date
JPS5724132A true JPS5724132A (en) 1982-02-08
JPS615298B2 JPS615298B2 (en) 1986-02-17

Family

ID=14265754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10013180A Granted JPS5724132A (en) 1980-07-21 1980-07-21 Power line data transmission system

Country Status (1)

Country Link
JP (1) JPS5724132A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370943A3 (en) * 1988-11-22 1991-06-12 Harel Giora System for telemetering data
US5451235A (en) * 1991-11-05 1995-09-19 C.R. Bard, Inc. Occluder and method for repair of cardiac and vascular defects
US5709707A (en) * 1995-10-30 1998-01-20 Children's Medical Center Corporation Self-centering umbrella-type septal closure device
US6508828B1 (en) 2000-11-03 2003-01-21 Radi Medical Systems Ab Sealing device and wound closure device
US6596012B2 (en) 2000-04-19 2003-07-22 Radi Medical Systems Ab Intra-arterial occluder

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0370943A3 (en) * 1988-11-22 1991-06-12 Harel Giora System for telemetering data
US5451235A (en) * 1991-11-05 1995-09-19 C.R. Bard, Inc. Occluder and method for repair of cardiac and vascular defects
US5709707A (en) * 1995-10-30 1998-01-20 Children's Medical Center Corporation Self-centering umbrella-type septal closure device
US6596012B2 (en) 2000-04-19 2003-07-22 Radi Medical Systems Ab Intra-arterial occluder
US6508828B1 (en) 2000-11-03 2003-01-21 Radi Medical Systems Ab Sealing device and wound closure device

Also Published As

Publication number Publication date
JPS615298B2 (en) 1986-02-17

Similar Documents

Publication Publication Date Title
US4442426A (en) Signal transmission
SE8003302L (en) DEVICE FOR TIME MULTIPLEX DATA TRANSFER
GB1147028A (en) Data communication system employing an asynchronous start stop clock generator
JPS5724132A (en) Power line data transmission system
SE7611223L (en) DEVICE FOR TRANSMISSION OF CLOCK SIGNALS
JPS561645A (en) Remote control system for optical repeater
GB1282134A (en) Digital signalling system
DE3160825D1 (en) Method and device for digital frequency selection
ES475227A1 (en) Electronically controlled power supply rail
JPS5437675A (en) Pulse count circuit
SU1088052A1 (en) Device for transmitting and receiving telecontrol signals
JPS5754443A (en) Optical pulse transmitting and receiving system
US3748388A (en) Encoder-decoder system
JPS53131715A (en) Circuit selection system
JPS57112148A (en) System for multiplexing digital signal
SU588639A1 (en) Method of monitoring the level of multiple transmission system individual analogue channels
JPS57106264A (en) System for data reproducing
JPS5337449A (en) Pulse transmission and reception system
JPS55109097A (en) Remote control system
SU780214A1 (en) Combined communication system
JPS5398704A (en) Optical multiplex transmission system
JPS56165417A (en) Code transmitting circuit
JPS51120606A (en) Multifrequency multiplex transmission receiver utilizing power distrib ut ion wires
JPS5775045A (en) Input and output monitor system
SU698168A1 (en) Selective call system