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EP0242090A2 - Lecture à distance d'une quantité mesurée - Google Patents

Lecture à distance d'une quantité mesurée Download PDF

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Publication number
EP0242090A2
EP0242090A2 EP87302910A EP87302910A EP0242090A2 EP 0242090 A2 EP0242090 A2 EP 0242090A2 EP 87302910 A EP87302910 A EP 87302910A EP 87302910 A EP87302910 A EP 87302910A EP 0242090 A2 EP0242090 A2 EP 0242090A2
Authority
EP
European Patent Office
Prior art keywords
meter
liquid crystal
further characterized
light
flashes
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Withdrawn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
EP87302910A
Other languages
German (de)
English (en)
Other versions
EP0242090A3 (fr
Inventor
John William Shadrach
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.)
Smith Meters Ltd
Original Assignee
Smith Meters 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 Smith Meters Ltd filed Critical Smith Meters Ltd
Publication of EP0242090A2 publication Critical patent/EP0242090A2/fr
Publication of EP0242090A3 publication Critical patent/EP0242090A3/fr
Withdrawn legal-status Critical Current

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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
    • G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared

Definitions

  • the invention relates to the remote reading of a metered quantity, for instance the reading of a gas meter.
  • the present invention comprises a meter adapted for reading at a remote reading station of the kind in which the meter is adapted to present its metered quantity as an electrical signal which may be read at the remote reading station, characterized by means for displaying the electrical signal as a coded sequence of light flashes at the meter, which flashes may be read at the remote reading station.
  • a gas meter (ll) has a pair of gas chambers, not shown, in which flexible diaphragms work back and forth alternately admitting and exhausting gas through valves.
  • the back-and-­forth movements are a measure of the amount of gas passing through the meter, and are transmitted through flag rods (l2) and crank levers (l3) to a common radius arm (l4).
  • Radius arm (l4) rotates shaft (l5) which operates the opening and closing of the valves.
  • a sensor (l7) produces an electrical pulse each time the adjacent radius arm passes it, the pulses being counted by an electronic circuit (l8).
  • the running total of volume of gas passed by the meter is displayed on an electronic display (20), for instance a liquid crystal displaying a decimal number seen best in Figure 2.
  • Battery (2l) powers the electrical items.
  • Electronic circuit (l8) produces its running total in both decimal and binary coded forms, the decimal form being displayed in decimal numbers on display (20).
  • the binary number is also displayed by a single flashing signal indicator (26).
  • the binary 0's and l's are represented by the absence or presence of flashes of light in a timed sequence. The whole sequence is repeated with gaps between and/or an extra long flash to separate one number from the next. The number cannot easily be read visually, because the sequence is too rapid, but it is detected by a photo-electric sensor (22) which feeds electrical signals along an electric cable (23) to a remote reading station (24). Here the signals may be used to produce a decimal display for visual reading and/or may feed directly into an automatic billing device.
  • the flashing indicator (26) is a part of a liquid crystal display and therefore requires illumination.
  • An electrically powered lamp (27) is mounted beside the photo-electric sensor (22) and directed to energise the indicator (26).
  • the photo-electric sensor (22) and lamp (27) are both powered from the reading station (24) and do not impose any drain on the meter's own electrical supply.
  • the distance which the reading station can be located away from the meter is limited only by the length of cable (23).
  • the reading station can be at the front gate of a house or at a local centre to which a number of cables from meters are led.
  • a binary-coded signal indicator (26) similar to that described above is used.
  • the display is viewed by a fibre optic cable (30) which transmits light along a core to be detected by a remote photo-electric sensor (3l).
  • Another core of the fibre optic cable transmits light in the opposite direction to energise the indicator (26).
  • Photo-electric sensor (3l) may comprise part of a remote reading station at which the billing function is carried out, or may act as a relay station providing electrical signals representing the binary number to a distant computer or display device.
  • the signal indicator (26) may, in either example, also convey other coded metering information, e.g. gas temperature, gas flow rate, calibration factors, compensation factors, and/or self checking data, for instance concerning the state of battery (2l), or attempts to interfere with the normal operation of the meter.
  • coded metering information e.g. gas temperature, gas flow rate, calibration factors, compensation factors, and/or self checking data, for instance concerning the state of battery (2l), or attempts to interfere with the normal operation of the meter.
  • a meter buried or partially buried so as to be concealed can be read at a remote location.
  • the meter's own battery-supplied electricity is only used for internal logic and memory functions and a liquid crystal display, all of which have only a low electrical power requirement.
  • indicator (26) all electrical power required for the transmission of the reading to a remote location is externally supplied.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
EP87302910A 1986-04-17 1987-04-02 Lecture à distance d'une quantité mesurée Withdrawn EP0242090A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868609403A GB8609403D0 (en) 1986-04-17 1986-04-17 Remote reading of metered quantity
GB8609403 1986-04-17

Publications (2)

Publication Number Publication Date
EP0242090A2 true EP0242090A2 (fr) 1987-10-21
EP0242090A3 EP0242090A3 (fr) 1988-01-07

Family

ID=10596370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302910A Withdrawn EP0242090A3 (fr) 1986-04-17 1987-04-02 Lecture à distance d'une quantité mesurée

Country Status (4)

Country Link
EP (1) EP0242090A3 (fr)
DK (1) DK192187A (fr)
GB (1) GB8609403D0 (fr)
PT (1) PT84720B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031178A (en) * 1988-10-12 1991-07-09 American Standard Inc. Apparatus and method for ground isolated system diagnostics
DE9108362U1 (de) * 1991-04-25 1991-10-31 Conrad Electronic GmbH, 8452 Hirschau Vorrichtung zur Übertragung von Daten
GB2228641B (en) * 1989-02-28 1994-03-23 Megger Instr Ltd Measuring instrument
GB2330436A (en) * 1997-10-15 1999-04-21 Pittway Corp Read-out from electrical modules
WO2002006773A1 (fr) * 2000-07-14 2002-01-24 Landys + Gyr Ltd Appareil de mesure d'energie
FR2831263A1 (fr) * 2001-10-22 2003-04-25 Solendata Procede et dispositif d'acquisition et de collecte de grandeurs physiques mesurables

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213119A (en) * 1976-04-29 1980-07-15 Energy Optics, Inc. Remote meter reading system providing demand readings and load control from conventional KWH meters
JPS59133743A (ja) * 1983-01-20 1984-08-01 Matsushita Electric Ind Co Ltd リモコン装置
WO1985005530A1 (fr) * 1984-06-06 1985-12-19 Ncr Corporation Systeme bidirectionnel de communications de donnees optiques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213119A (en) * 1976-04-29 1980-07-15 Energy Optics, Inc. Remote meter reading system providing demand readings and load control from conventional KWH meters
JPS59133743A (ja) * 1983-01-20 1984-08-01 Matsushita Electric Ind Co Ltd リモコン装置
WO1985005530A1 (fr) * 1984-06-06 1985-12-19 Ncr Corporation Systeme bidirectionnel de communications de donnees optiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 261 (E-281)[1698], 30th November 1984; & JP-A-59 133 743 (MATSUSHITA DENKI SAGYO K.K.) 01-08-1984 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031178A (en) * 1988-10-12 1991-07-09 American Standard Inc. Apparatus and method for ground isolated system diagnostics
GB2228641B (en) * 1989-02-28 1994-03-23 Megger Instr Ltd Measuring instrument
DE9108362U1 (de) * 1991-04-25 1991-10-31 Conrad Electronic GmbH, 8452 Hirschau Vorrichtung zur Übertragung von Daten
GB2330436A (en) * 1997-10-15 1999-04-21 Pittway Corp Read-out from electrical modules
WO2002006773A1 (fr) * 2000-07-14 2002-01-24 Landys + Gyr Ltd Appareil de mesure d'energie
FR2831263A1 (fr) * 2001-10-22 2003-04-25 Solendata Procede et dispositif d'acquisition et de collecte de grandeurs physiques mesurables

Also Published As

Publication number Publication date
DK192187D0 (da) 1987-04-14
PT84720A (en) 1987-05-01
EP0242090A3 (fr) 1988-01-07
DK192187A (da) 1987-10-18
GB8609403D0 (en) 1986-05-21
PT84720B (en) 1989-06-02

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Inventor name: SHADRACH, JOHN WILLIAM