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JPS5591251A - Data collecting system - Google Patents

Data collecting system

Info

Publication number
JPS5591251A
JPS5591251A JP16476578A JP16476578A JPS5591251A JP S5591251 A JPS5591251 A JP S5591251A JP 16476578 A JP16476578 A JP 16476578A JP 16476578 A JP16476578 A JP 16476578A JP S5591251 A JPS5591251 A JP S5591251A
Authority
JP
Japan
Prior art keywords
power source
data
clock
pulses
register
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
JP16476578A
Other languages
Japanese (ja)
Inventor
Yusaku Yamada
Kunio Nozawa
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16476578A priority Critical patent/JPS5591251A/en
Publication of JPS5591251A publication Critical patent/JPS5591251A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/14—Calling by using pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To secure the connection via two lines between the data collecting device and the terminal unit with no power source by supplying the power synchronized with the clock to the terminal with no power source. CONSTITUTION:When data collecting device 1 starts operation, switching circuit 5 synchronizes with the internal clock to turn on and off the power source and then deliver the pulses onto transmission lines 10 and 11. Terminal unit 2 with no power source rectifies via rectifier circuit 7 the pulses sent from device 1 through line 10 and then extracts the power voltage. In addition to the rectification, circuit 7 extracts the clock pulses out of the pulses to supply them to register 9. Register 9 delivers the accumulated data to switching circuit 8 in sequence and in synchronization with the clock pulse supplied and then gives the modulation to the pulse duration on lines 10 and 11 each in accordance with the data. This pulse duration is monitored via pulse duration detector circuit 6, and the data within register 9 receive the detection.
JP16476578A 1978-12-28 1978-12-28 Data collecting system Pending JPS5591251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16476578A JPS5591251A (en) 1978-12-28 1978-12-28 Data collecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16476578A JPS5591251A (en) 1978-12-28 1978-12-28 Data collecting system

Publications (1)

Publication Number Publication Date
JPS5591251A true JPS5591251A (en) 1980-07-10

Family

ID=15799494

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16476578A Pending JPS5591251A (en) 1978-12-28 1978-12-28 Data collecting system

Country Status (1)

Country Link
JP (1) JPS5591251A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652877A (en) * 1983-07-01 1987-03-24 Rockwell International Corporation Meter data gathering and transmission system
US6087957A (en) * 1983-07-01 2000-07-11 M&Fc Holding Company, Inc. Meter data gathering and transmission system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493510A (en) * 1972-04-21 1974-01-12
JPS50156463A (en) * 1974-06-07 1975-12-17

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS493510A (en) * 1972-04-21 1974-01-12
JPS50156463A (en) * 1974-06-07 1975-12-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652877A (en) * 1983-07-01 1987-03-24 Rockwell International Corporation Meter data gathering and transmission system
US6087957A (en) * 1983-07-01 2000-07-11 M&Fc Holding Company, Inc. Meter data gathering and transmission system

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