GB2347830A - Multidrop power and communications bus terminator - Google Patents

Multidrop power and communications bus terminator Download PDF

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Publication number
GB2347830A
GB2347830A GB9901842A GB9901842A GB2347830A GB 2347830 A GB2347830 A GB 2347830A GB 9901842 A GB9901842 A GB 9901842A GB 9901842 A GB9901842 A GB 9901842A GB 2347830 A GB2347830 A GB 2347830A
Authority
GB
United Kingdom
Prior art keywords
bus
power
devices
voltage
multidrop
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.)
Withdrawn
Application number
GB9901842A
Other versions
GB9901842D0 (en
Inventor
Frank Gerwin Kaufhold
Paul Alexander Grafton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9901842A priority Critical patent/GB2347830A/en
Publication of GB9901842D0 publication Critical patent/GB9901842D0/en
Publication of GB2347830A publication Critical patent/GB2347830A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/28—Restricting access to network management systems or functions, e.g. using authorisation function to access network configuration
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • 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
    • H04B2203/5495—Systems for power line communications having measurements and testing channel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • Small-Scale Networks (AREA)

Abstract

A master device 1 is connected to one end of a multidrop power and communications bus 2. The bus consists of a number of electrical conductors, some of which are used for the distribution of electrical power from the master device 1 to other devices 3,4,5,6,7,8 daisy chained along the length of the bus. The bus also provides one or more electrical communications paths between devices on the bus. A bus terminator 8 continuously monitors the power supply voltages at the far end of the bus and sends the readings to the master device. Alternatively status or alarm messages may be sent to the master device. The bus terminator thus provides a means of verifying adequate power distribution over the length of the bus. The device may also detect unauthorised connection to the bus by also monitoring the communication signal and voltage levels on the multiwire bus.

Description

Multidrop Power and Communications Bus Terminator This invention relates to an electronic power and communications bus terminator, used to electrically terminate the far end of a multidrop bus, consisting of a number of wires used for powering a number of electronic devices and providing a communications signal path between them.
A multiwire electrical bus may be used to simultaneously provide power and a communications path between a number of electronic devices spread over a wide physical area. A key limiting factor in this form of distributed architecture is the voltage drop between the device powering the bus and devices further along the bus, caused by the resistance of the bus wires carrying power to the remote devices. The severity of this problem is further increased if the individual devices powered by the bus draw varying amounts of current as this will result in voltage fluctuations along the bus. In some circurnstances this may result in devices connected towards the far end of the bus having insufficient voitage provided to power them reliably.
An object of this invention is to provide a means of remotely monitoring the voltage of the power distribution wires at the end of the bus to ensure that all devices connected to the bus are properly powered.
Accordingly this invention provides a means of monitoring the distributed power voltage at the far end of the bus, by using a microcomputer device in conJunction with an analogue to digital converter to continuously measure this voltage and relay this information over the bus communications wires via a communications protocol.
This invention may also provide far end of bus electrical termination for the communications bus wires.
It may also monitor the electrical signal levels on these communications wires using an analogue to digital converter.
This Invention may also provide a local indication of the end of bus voltage (s) using optical indicators.
The absence of communications from the invention may also be used as a signal that the bus has been severed or that there is insufficient voltage available at the end of the bus to power the devices connected to the bus.
A preferred embodiment of the invention will now be described.
Figure 1 shows a typical implementation of the invention.
Figure 1 shows a multidrop power and communications bus 2 connecting a microcomputer master controiler device 1 to a number of other microcomputer devices 3, 4, 5, 6. 7 and the invention 8.
The master controller device 1 is connected to the other devices by a multiwire electrical bus 2. The muftiwire electricai bus 2 provides power to all of the devices 3, 4, 5, 6, 7, 8 connected to the bus using two or more of the wires that constitute the bus. Communication between the master controller device 1 and all other devices on the bus 3, 4, 5. 6, 7, 8 is implemented using two or more of the wires that constitute the bus.
The invention 8 is connected to the far end of the multiwire bus 2, and consists of a microcomputer and one or more analogue to digital converter circuits, that are wired in such a way as to be able to monitor some or all of the power supply voltages distributed over the multiwire bus 2.
The microcomputer in the invention samples the voltage (s) measured across the power distribution wires of the muftiwire bus 2 at the end of the bus and reports these readings to the master controller device 1 at intervals, using two or more of the bus wires to carry the electrical communication signais.
Alternatively the invention may be used to provide an alarm, status message or signal relating to the power distribution voltage levels at the far end of the muitiwtre bus 2 to the master controller device 1.
The invention may be used to continuously verify that the multiwire bus 2 is intact and that adequate voltage is available from the power distribution wires within this bus to power all devices on the bus 3, 4, 5, 6, 7, 8.
The invention 8 may also be used to detect illegal tampering with the bus by also monitoring the communication signal and voltage levels on the multiwire bus 2.

Claims (4)

  1. CLAIMS 1. An electronic device designed to be connected to the far end of a multiwire multidrop power and communications electrical bus, which can monitor the power distribution voltage levels at the far end of the bus and can communicate the voltage readings to other devices connected to the bus.
  2. 2. An electronic device as in Claim 1, which can monitor the power voltage levels at the far end of the bus and can communicate alarms, status messages or signals relating to the status of these voltage (s) to other devices connected to the bus.
  3. 3. An electronic device as in Claim 1 or Claim 2 which can monitor the voltage levels on the signal wires of the bus and can communicate processed voltage readings or status messages relating to the signal levels to other devices on the bus.
  4. 4. An electronic device as in Claim 1 or Claim 2 or Claim 3 which can detect the connection of external loads across bus wire pairs by monitoring voltage changes and can thereby detect unauthorised connection to the bus and can communicate such events to other devices on the bus.
GB9901842A 1999-01-28 1999-01-28 Multidrop power and communications bus terminator Withdrawn GB2347830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9901842A GB2347830A (en) 1999-01-28 1999-01-28 Multidrop power and communications bus terminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9901842A GB2347830A (en) 1999-01-28 1999-01-28 Multidrop power and communications bus terminator

Publications (2)

Publication Number Publication Date
GB9901842D0 GB9901842D0 (en) 1999-03-17
GB2347830A true GB2347830A (en) 2000-09-13

Family

ID=10846623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9901842A Withdrawn GB2347830A (en) 1999-01-28 1999-01-28 Multidrop power and communications bus terminator

Country Status (1)

Country Link
GB (1) GB2347830A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1945004A1 (en) * 2007-01-11 2008-07-16 OmniLux Lighting, LLC Parallel lamp connection with one dimmer circuit
CN110488199A (en) * 2019-09-04 2019-11-22 国网湖南省电力有限公司 A kind of high capacity cell energy-accumulating power station battery system alarm response method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113169906B (en) * 2018-12-12 2022-09-30 三菱电机株式会社 Information processing apparatus, information processing method, and computer-readable storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978461A (en) * 1975-05-12 1976-08-31 Firetek Corporation Three wire detection circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978461A (en) * 1975-05-12 1976-08-31 Firetek Corporation Three wire detection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1945004A1 (en) * 2007-01-11 2008-07-16 OmniLux Lighting, LLC Parallel lamp connection with one dimmer circuit
CN110488199A (en) * 2019-09-04 2019-11-22 国网湖南省电力有限公司 A kind of high capacity cell energy-accumulating power station battery system alarm response method
CN110488199B (en) * 2019-09-04 2021-06-01 国网湖南省电力有限公司 Alarm response method for battery system of high-capacity battery energy storage power station

Also Published As

Publication number Publication date
GB9901842D0 (en) 1999-03-17

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)