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GB2140659A - Cash flow monitoring system - Google Patents
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GB2140659A - Cash flow monitoring system - Google Patents

Cash flow monitoring system

Info

Publication number
GB2140659A
GB2140659A GB08412482A GB8412482A GB2140659A GB 2140659 A GB2140659 A GB 2140659A GB 08412482 A GB08412482 A GB 08412482A GB 8412482 A GB8412482 A GB 8412482A GB 2140659 A GB2140659 A GB 2140659A
Authority
GB
United Kingdom
Prior art keywords
data
carrier frequency
pulse train
carrier
power
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
GB08412482A
Other versions
GB2140659B (en
GB8412482D0 (en
Inventor
Kenneth L Clements
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.)
Cybex International Inc
Original Assignee
Cybex International Inc
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 Cybex International Inc filed Critical Cybex International Inc
Publication of GB8412482D0 publication Critical patent/GB8412482D0/en
Publication of GB2140659A publication Critical patent/GB2140659A/en
Application granted granted Critical
Publication of GB2140659B publication Critical patent/GB2140659B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • 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
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • 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
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5445—Local network
    • 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
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5458—Monitor sensor; Alarm systems
    • 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
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing
    • 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
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Pipeline Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Small-Scale Networks (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A computerized monitoring system which incorporates the power lines (60) that provide electrical power to the remote devices (12) as the physical communications medium of a serial data bus for the computer system. The system comprises a central computer (10) and a plurality of computerized sensor modules (80) within the individual remote devices. The central computer and each of the sensor modules (80) has associated with it a respective data link (70, 87) for coupling respective signal generating and receiving means (65, 67, 82, 85) to the power distribution lines (60) and for manipulating the signals to and from a form suitable for transmission on the power distribution lines. Phase shift keying is used wherein binary bits of data are represented as 180<o> phase shifts of the pulses in a carrier pulse train. A data transmission rate of approximately 15,000 baud with a carrier frequency of 120 KHz is typical. A polling signal includes a preamble of pure carrier frequency, followed by the serial number of the device being polled, by the data (or instructions) defining the message content. Each data link has its own clock for generating a pulse train at a frequency very close to the common carrier frequency, and includes means for bringing its own carrier frequency pulse train approximately into a predetermined phase relationship with the carrier train that is appearing on the power lines.
GB08412482A 1982-09-27 1982-09-27 Cash flow monitoring system Expired GB2140659B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/001334 WO1984001482A1 (en) 1982-09-27 1982-09-27 Cash flow monitoring system

Publications (3)

Publication Number Publication Date
GB8412482D0 GB8412482D0 (en) 1984-06-20
GB2140659A true GB2140659A (en) 1984-11-28
GB2140659B GB2140659B (en) 1986-03-05

Family

ID=22168229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08412482A Expired GB2140659B (en) 1982-09-27 1982-09-27 Cash flow monitoring system

Country Status (5)

Country Link
EP (1) EP0119999A1 (en)
JP (1) JPS59501808A (en)
AU (1) AU555336B2 (en)
GB (1) GB2140659B (en)
WO (1) WO1984001482A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227453A (en) * 1988-12-30 1990-08-01 Alcatel Business Systems Franking machine communication system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU579363B2 (en) * 1984-04-17 1988-11-24 Electricity Trust Of South Australia, The A Bi-Directional Multi-Frequency Ripple Control System
GB8912276D0 (en) * 1989-05-27 1989-07-12 Allen John Data communication apparatus
US5218552A (en) * 1990-07-30 1993-06-08 Smart House, L.P. Control apparatus for use in a dwelling
GB9415594D0 (en) * 1994-08-02 1994-09-21 Ptf Consultants Ltd Improvements in and relating to remote monitoring and signalling
CN115865683B (en) * 2023-03-02 2023-05-23 山东创安交通预警工程有限公司 Intelligent community equipment management system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512857A (en) * 1974-09-13 1978-06-01 Bally Mfg Corp Monitoring system for use with amusement game devices
US4311986A (en) * 1978-09-13 1982-01-19 The Bendix Corporation Single line multiplexing system for sensors and actuators
US4300126A (en) * 1980-04-11 1981-11-10 General Electric Co. Method and apparatus, for power line communications using zero crossing load interruption

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227453A (en) * 1988-12-30 1990-08-01 Alcatel Business Systems Franking machine communication system
GB2227453B (en) * 1988-12-30 1993-03-31 Alcatel Business Systems Franking system

Also Published As

Publication number Publication date
AU555336B2 (en) 1986-09-18
AU9050482A (en) 1984-04-24
JPS59501808A (en) 1984-10-25
GB2140659B (en) 1986-03-05
GB8412482D0 (en) 1984-06-20
EP0119999A1 (en) 1984-10-03
WO1984001482A1 (en) 1984-04-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee