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WO1993004451A1 - Systeme de collecte de donnees - Google Patents

Systeme de collecte de donnees Download PDF

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Publication number
WO1993004451A1
WO1993004451A1 PCT/CA1992/000363 CA9200363W WO9304451A1 WO 1993004451 A1 WO1993004451 A1 WO 1993004451A1 CA 9200363 W CA9200363 W CA 9200363W WO 9304451 A1 WO9304451 A1 WO 9304451A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
identification code
unique identification
microcontroller
reading means
Prior art date
Application number
PCT/CA1992/000363
Other languages
English (en)
Inventor
John Mallory
Christopher Hook
Christopher Hall
Original Assignee
Disys Corporation
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 Disys Corporation filed Critical Disys Corporation
Publication of WO1993004451A1 publication Critical patent/WO1993004451A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D4/00—Tariff metering apparatus
    • G01D4/002—Remote reading of utility meters
    • G01D4/006—Remote reading of utility meters to a non-fixed location, i.e. mobile location
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Definitions

  • the present invention relates in general to data gathering systems and more particularly to a system for gathering data on utility meter readouts.
  • U.S. Patent Nos. 4,031,513 (Simciak) and 4,799,059 (Gindahl) disclose radio frequency systems by which a mobile transmitter generates an RF interrogation signal to respective remote transponders connected to utility meters. In response, the transponders generate data concerning power usage, water usage, etc., for reception by the mobile interrogator.
  • U.S. Patent 4,213,119 (Ward et al) discloses a remote meter reading system which operates using an electro-optical link.
  • a plurality of RF transmitters are located in residential or industrial sites, each transmitter having inputs for receiving data from the utility meters (e.g. water, power, etc.) and transmitting the data received from the utility meters to a central data collection unit at predetermined time intervals.
  • the utility meters e.g. water, power, etc.
  • the system of the present invention is primarily applicable to domestic dwellings, where there are a very large number of meters to be read, but the proposed system is not limited to this particular application and may equally well be used in industrial applications, or indeed, in any situation where it is required to collect data infrequently and from remote sites without visiting those sites.
  • the system in its broader aspects may be applied to numerous other data gathering problems.
  • the system of the present invention may be used for counting of vehicles at road intersections for the purpose of flow monitoring and traffic management.
  • FIG. 1 is a block diagram of the system of the present invention.
  • FIG. 2 is a detailed block diagram of a central data collection unit according to the preferred embodiment.
  • the system comprises a meter monitoring module (MMU) 1 having a microprocessor or microcontroller 3, a timer 5, a liquid crystal display 7, a push button 9, a spread spectrum (SS) transmitter 11 and power source in the form of lithium cell 13.
  • MMU meter monitoring module
  • SS spread spectrum
  • a flow monitoring unit (FMU) 15 provides data to the MMU 1, as will be described in greater detail below.
  • FMU 15 incorporates a passive sensor comprising a permanent magnet mounted to the fly wheel of an electric power meter, gas meter or the like, in combination with a read switch which may be actuated upon each passing rotation of the magnet, such that the number of rotations of the fly wheel may be counted and furnished to the MMU 1.
  • Pulses are delivered to the MMU 1 from the FMU 15.
  • the manner in which these pulses are derived is of no consequence to the MMU 1; an active sourde may be employed, such as a shaft encoder/decoder or a Hall effect transducer, but more commonly the above-discussed simple reed switch and permanent magnet will be utilized.
  • an active sourde may be employed, such as a shaft encoder/decoder or a Hall effect transducer, but more commonly the above-discussed simple reed switch and permanent magnet will be utilized.
  • a suitable system is disclosed in U.S.
  • Patent 4,315,248 (Ward).
  • the interval between pulses is long in computing terms (one pulse every 10 to 20 seconds in the case of a gas flow meter) , and the actual interval is irrelevant to operation of the MMU 1.
  • the modular approach to the system provides that the same design of MMU 1 can be fed with pulses from gas, electricity or water meters or for counting the passage of vehicles in a traffic application. Between pulses, the MMU 1 is in a quiescent state, consuming least power from the lithium cell 13.
  • Use of inexpensive commercially available lithium cells lithium thionyl chloride chemistry) , results in an operational life in excess of 10 years from one cell.
  • the MMU 1 accumulates the count of pulses received. This count is stored in E 2 PROM of the microprocessor 3 for reliability. The consumer is charged for consumption on the basis of the accumulating count, so the data must be stored in a non-volatile manner.
  • Battery backed-up RAM can be used as a suitable storage medium but in view of the importance of the information held in the storage device (accumulated consumption of gas, for example), battery backed-up RAM offers a lower integrity of data storage than E 2 PROM
  • E 2 PROM A characteristic of E 2 PROM is that each location may only be written to a limited number of times (unlike RAM) .
  • the write cycle endurance (number of write cycles to a particular location before the retention characteristics of the memory, in the absence of power, cannot be guaranteed) will be of the order of 10 4 to 10 6 .
  • a count of 10 4 pulses might accumulate surprisingly quickly, dependent on the rate of flow being monitored and hence the interval between pulses from the FMU 15. Therefore, the microprocessor 3 'in the MMU 1 inspects the accumulating count every time a pulse is received. If the number of pulses accumulated exceeds a limit (10 4 , say) , then the block of data representing the accumulated count is moved one location further up in terms of the memory addressing.
  • the timer 5 provides a further input to the microprocessor 3.
  • the timer delivers pulses (interrupts) approximately once every hour. This is used to permit the MMU 1 to perform housekeeping operations.
  • the one hour timer 5 is not a close tolerance timer. It is designed to be sensitive to variations in temperature and component tolerance and ageing, resulting in a timer interval which may vary by ⁇ 10% of its nominal value. This variation will result in a relative shift between timer output pulses occurring at different meters.
  • timer 5 may be an integral part of microcontroller 3 and although the timer may then be referenced to an accurate time base such as the microcontroller's crystal controlled clock, an algorithm could be employed to process periodic timer interrupts in order to produce the same effect of timing drift that would be observed with an imprecise external timer.
  • each MMU 1 transmits its stored data. This may occur as a result of a timer pulse being received and causing a transmit interval timer to overflow.
  • a data packet from the MMU 1 comprises a unique identification number for the MMU (that identification number being installed in the MMU's E 2 PROM during manufacture and being unalterable) , the accumulated count (metered units) , some control/status flags, and error check bits. Transmission will occur very infrequently; for example, in the case of a domestic gas meter, one transmission cycle every week would be quite adequate.
  • the MMU 1 preferably transmits a data packet several times, with a pseudo-rando ly varying interval between transmissions. The varying interval, coupled with the inherent drift in timer intervals between meters allows for a large number of meters to make use of a single transmission channel. Data is transmitted from each MMU 1 via SS transmitter 11.
  • a spread spectrum transmitter 11 (and receiver 19 in the DCU) is proposed as this method of RF transmission is inherently substantially immune to interference.
  • the immune characteristic of SS is an important benefit of the present system, since the nature of signals which could potentially interfere with the desired transmissions will vary widely.
  • a further advantage accruing from the use of SS techniques is that it is very difficult to monitor SS transmissions other than with a receiver matched to the transmitter, and furthermore it is difficult to simulate such transmissions without an appropriate encoder and transmitter. These difficulties result in a relatively secure system thereby minimizing the risk of fraud.
  • a further advantage accrued from the use of spread spectrum radio technology is the immunity of the system from fading.
  • Fading is the term used to describe a reduction in signal strength of a narrow band signal due to environmental conditions which affect the propagational characteristics of radio waves. For example, consider a stationary vehicle with a VHF FM radio tuned to a particular frequency (station) , and from time to time large vehicle pass by the stationary one. It is commonly observed that under these circumstances the received signal will be distorted as the propagation path between transmitter and receiver has been modified by the transient presence of a passing vehicle. Problems of fading are significantly reduced through the use of spread spectrum radio transmission, so consequently in this application things which effect the nature of the propagation path between MMUs and DCUs will have drastically less detrimental effect on the performance of this system compared with a similar system which employed narrow band radio signals.
  • the spread spectrum transmitter 11 (and SS receiver 19 in Figure 2) may be operated in accordance with the principles disclosed in U.S. Patent 4,977,577 (Arthur et al)
  • the MMU l may transmit at times other than when the routine transmission interval timer 5 overflows.
  • the MMU l may be provided with an output which monitors a tamper circuit (not shown) , and a special transmission could be produced to alert the monitoring system to this event.
  • the MMU 1 It is possible for the MMU 1 to be directed to display the stored accumulated count. For reasons of power economy, the LCD 7 is not driven at all times, but only on demand. Legislation currently dictates that the consumer must be able to "read” his usage of gas (for example) , but since a demand is likely to be infrequent, there is no need to display this information permanently.
  • the MMU 1 is provided with a push button 9, depression of which causes the microprocessor 3 to present information on the display.
  • the MMU 1 For maintenance of the system, the MMU 1 includes a connector 21 for a device 23 such as a hand held terminal. Facilities are provided to allow the MMU 1 to be directed to perform tasks such as transmitting on demand to the nearby DCU 17, thus enabling the complete data collection system to be exercised. The remainder of the system works in the following manner.
  • the DCU 17 comprises SS receiver 19 and a data processor 25. Signals detected by the SS receiver 19 are processed, and those originating from MMUs l which are free of errors are held ready for onward transmission to a central data gathering computer (not shown) via a wide- area radio modem 27 connected to the data processor 25.
  • the DCU 17 is a flexible and powerful unit relative to the MMU 1, capable of storing readings captured from up to 1,000 MMUs ready for onward transmission.
  • the DCU 17 can be configured to transmit data in convenient packet sizes, dependent on the chosen DCU 17 to central computer link, and, if appropriate, the DCU can be directed to use the communications channel at particular times of the day in order to take advantage of the preferential discount rates, etc.
  • the specific type of link between the DCU 17 and the central computer (not shown) is not critical. Practical examples of communications links between DCUs and the central computer are PAKNET, which is a dedicated, deterministic packet-switching RF communications network, or PSTN, and the cellular radio network. It may well be that in some applications the service providers will already have an existing RF communications network over which the meter readings could be gathered.
  • PAKNET is a dedicated, deterministic packet-switching RF communications network, or PSTN, and the cellular radio network. It may well be that in some applications the service providers will already have an existing RF communications network over which the meter readings could be gathered.
  • the data processor 25 of DCU 17 is shown in greater detail comprising a microprocessor or central processing unit (CPU) 31, memory in the form of ROM 33, RAM 35 and E 2 PROM 37 connected to the CPU 31 via data bus 39 and address bus 41, in a well known manner, and a watchdog circuit 43 for supervising the operation of the CPU 31 and providing power management functions using well known methods. Control logic is not shown, for clarity of representation.
  • CPU central processing unit
  • ROM 33 read-only memory
  • RAM 35 and E 2 PROM 37 connected to the CPU 31 via data bus 39 and address bus 41, in a well known manner
  • watchdog circuit 43 for supervising the operation of the CPU 31 and providing power management functions using well known methods. Control logic is not shown, for clarity of representation.
  • the CPU 31 is driven by a first crystal referenced clock 45 and has a further real time clock 47, with back-up battery 49, connected thereto as a peripheral for controlling the timing of transmissions from the DCU 17 to the central host computer via modem 27, so that the DCU has knowledge of the time of day, so that it can for example time stamp messages received from MMUs and messages transmitted to the host computer, and for reference so that the DCU may transmit packets of information to the host computer at set times.
  • the modem 27 is connected to CPU 31 via serial line drivers and receivers 51, also in a well known manner.
  • the preferred embodiment data processor 25 shown in Figure 2 is also applicable to the design of microcontroller 3 in Figure 1.
  • a data gathering system is provided wherein the data gathering process is completely automated, requiring no human action or intervention.
  • the system of the present invention offers a meter monitoring unit (MMU 1) which is very simple, and thus presents a low cost solution to the problem of remote data gathering.
  • MMU 1 may be battery powered and therefore does not require connection to power mains supply at the domestic (or industrial) location. Since the MMU 1 does not need to be "active" other than in response to events delivered by the FMU 15, the MMU features exceptionally low quiescent power consumption thus offering extended service life between changes of battery 13.
  • Use of spread spectrum radio frequency transmissions results in reliability of this system that is greatly improved compared with narrow band radio systems.
  • a large number of sites/meters can be monitored by one data collection unit 17.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Système de collecte, de stockage et de transmission de données provenant d'une multiplicité d'unités génératrices de données (15), comprenant un élément (1) de lecture automatique de données connecté à chacune desdites unités génératrices de données et servant à recevoir et à stocker des données reçues à partir d'unités respectives parmi la multiplicité d'unités génératrices de données et à transmettre périodiquement, en réponse, lesdites données avec un code d'identification unique, et un élément (17) de collecte de données de zone servant à recevoir, à stocker et à retransmettre périodiquement lesdites données et ledit code d'identification unique à partir des éléments respectifs parmi lesdits éléments de lecture automatique de données sous forme de groupements collectifs.
PCT/CA1992/000363 1991-08-21 1992-08-21 Systeme de collecte de donnees WO1993004451A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9118030.7 1991-08-21
GB919118030A GB9118030D0 (en) 1991-08-21 1991-08-21 Data gathering system

Publications (1)

Publication Number Publication Date
WO1993004451A1 true WO1993004451A1 (fr) 1993-03-04

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Application Number Title Priority Date Filing Date
PCT/CA1992/000363 WO1993004451A1 (fr) 1991-08-21 1992-08-21 Systeme de collecte de donnees

Country Status (3)

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AU (1) AU2433992A (fr)
GB (1) GB9118030D0 (fr)
WO (1) WO1993004451A1 (fr)

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994009464A1 (fr) * 1992-10-19 1994-04-28 Metrona Wärmemesser Union Gmbh Dispositif pour releves de consommations de diverses quantites dans un immeuble
EP0617391A1 (fr) * 1993-03-22 1994-09-28 KUNDO SYSTEMTECHNIK GmbH Installation pour la saisie centrale des frais de consommation d'énergie
EP0627716A1 (fr) * 1993-04-17 1994-12-07 KUNDO SYSTEMTECHNIK GmbH Installation pour l'acquisition centrale des frais de consommation d'energie
EP0629098A3 (fr) * 1993-05-17 1995-01-18 Logica Uk Ltd
EP0635812A1 (fr) * 1993-05-24 1995-01-25 British Gas plc Thermostat télécommandé
EP0650151A1 (fr) * 1993-10-22 1995-04-26 Schlumberger Industries, Inc. Système radiofréquence de lecture de compteurs
EP0701727A4 (fr) * 1993-06-04 1996-07-24 M & Fc Holding Co Inc Systeme duplex bidirectionnel et multimode de lecture d'instruments a distance et de telemetrie
DE19504587A1 (de) * 1995-02-11 1996-08-14 Abb Patent Gmbh Zweiwegkommunikationssystem für Energieversorgungsnetze
DE19624273A1 (de) * 1995-09-20 1997-03-27 Fraunhofer Ges Forschung Verbrauchserfassungssystem zur Fernablesung
WO1997011445A1 (fr) * 1995-09-20 1997-03-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Systeme de mesure de consommation pour releve a distance
EP0622625A3 (fr) * 1993-04-27 1997-04-16 Hughes Aircraft Co Système de surveillance de la qualité de l'air.
WO1998010394A1 (fr) * 1996-09-06 1998-03-12 Innovatec Corporation Systeme de transmission de donnees a lecture automatique de compteur
EP0834849A1 (fr) * 1996-08-31 1998-04-08 Amatsia Dr. Kashti Dispositif de mesure
EP0847163A1 (fr) * 1996-11-29 1998-06-10 Electrowatt Technology Innovation AG Dispositif pour l'essai et/ou la commande à distance d'un système
EP0847162A1 (fr) 1996-11-29 1998-06-10 Landis & Gyr Technology Innovation AG Unité d'interface avec entrelacement pour la transmission de données numériques par un réseau de communication cellulaire
GB2326002A (en) * 1997-06-06 1998-12-09 Centrepoint Technology Limited Remote reading of meters and sensors
GB2344672A (en) * 1998-12-10 2000-06-14 British Gas Plc Meter interface
WO2003006924A1 (fr) * 2001-07-10 2003-01-23 Horst Ziegler Procede de collecte des donnees valeurs affichees aux compteurs et systeme de collecte de ces donnees
EP0899898A3 (fr) * 1997-08-29 2003-07-09 Siemens Aktiengesellschaft Signal de données pour transmission sans fil de données entre des modules collecteurs de données de traffic et au moins une unité centrale
US6867707B1 (en) 2002-04-24 2005-03-15 Elster Electricity, Llc Automated on-site meter registration confirmation using a portable, wireless computing device
US7046682B2 (en) 1997-02-12 2006-05-16 Elster Electricity, Llc. Network-enabled, extensible metering system
US7119713B2 (en) 2002-06-27 2006-10-10 Elster Electricity, Llc Dynamic self-configuring metering network
US7126494B2 (en) 1997-02-12 2006-10-24 Elster Electricity, Llc Remote access to electronic meters using a TCP/IP protocol suite
US7170425B2 (en) 2004-09-24 2007-01-30 Elster Electricity, Llc System and method for creating multiple operating territories within a meter reading system
US7176807B2 (en) 2004-09-24 2007-02-13 Elster Electricity, Llc System for automatically enforcing a demand reset in a fixed network of electricity meters
US7187906B2 (en) 2004-04-26 2007-03-06 Elster Electricity, Llc Method and system for configurable qualification and registration in a fixed network automated meter reading system
US7227350B2 (en) 2004-03-18 2007-06-05 Elster Electricity, Llc Bias technique for electric utility meter
US7239250B2 (en) 2004-04-26 2007-07-03 Elster Electricity, Llc System and method for improved transmission of meter data
US7262709B2 (en) 2004-04-26 2007-08-28 Elster Electricity, Llc System and method for efficient configuration in a fixed network automated meter reading system
FR2901604A1 (fr) * 2006-05-29 2007-11-30 Metercom Soc Par Actions Simpl Systeme de gestion de la consommation d'un flux individuellement mesuree par des compteurs repartis sur un territoire
US7308370B2 (en) 2005-03-22 2007-12-11 Elster Electricity Llc Using a fixed network wireless data collection system to improve utility responsiveness to power outages
US7308369B2 (en) 2005-09-28 2007-12-11 Elster Electricity Llc Ensuring automatic season change demand resets in a mesh type network of telemetry devices
US7312721B2 (en) 2002-06-28 2007-12-25 Elster Electricity, Llc Data collector for an automated meter reading system
US7315162B2 (en) 2004-03-18 2008-01-01 Elster Electricity, Llc Reducing power consumption of electrical meters
US7327998B2 (en) 2004-12-22 2008-02-05 Elster Electricity, Llc System and method of providing a geographic view of nodes in a wireless network
US7427927B2 (en) 2006-02-16 2008-09-23 Elster Electricity, Llc In-home display communicates with a fixed network meter reading system
US7495578B2 (en) 2005-09-02 2009-02-24 Elster Electricity, Llc Multipurpose interface for an automated meter reading device
US7545285B2 (en) 2006-02-16 2009-06-09 Elster Electricity, Llc Load control unit in communication with a fixed network meter reading system
US7702594B2 (en) 2004-09-24 2010-04-20 Elster Electricity, Llc System and method for automated configuration of meters
US7742430B2 (en) 2004-09-24 2010-06-22 Elster Electricity, Llc System for automated management of spontaneous node migration in a distributed fixed wireless network
US8073384B2 (en) 2006-12-14 2011-12-06 Elster Electricity, Llc Optimization of redundancy and throughput in an automated meter data collection system using a wireless network
US8320302B2 (en) 2007-04-20 2012-11-27 Elster Electricity, Llc Over the air microcontroller flash memory updates
US8525692B2 (en) 2008-06-13 2013-09-03 Elster Solutions, Llc Techniques for limiting demand from an electricity meter with an installed relay
US9612132B2 (en) 2007-12-26 2017-04-04 Elster Solutions, Llc Optimized data collection in a wireless fixed network metering system

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Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994009464A1 (fr) * 1992-10-19 1994-04-28 Metrona Wärmemesser Union Gmbh Dispositif pour releves de consommations de diverses quantites dans un immeuble
EP0617391A1 (fr) * 1993-03-22 1994-09-28 KUNDO SYSTEMTECHNIK GmbH Installation pour la saisie centrale des frais de consommation d'énergie
EP0627716A1 (fr) * 1993-04-17 1994-12-07 KUNDO SYSTEMTECHNIK GmbH Installation pour l'acquisition centrale des frais de consommation d'energie
EP0622625A3 (fr) * 1993-04-27 1997-04-16 Hughes Aircraft Co Système de surveillance de la qualité de l'air.
EP0629098A3 (fr) * 1993-05-17 1995-01-18 Logica Uk Ltd
EP0635812A1 (fr) * 1993-05-24 1995-01-25 British Gas plc Thermostat télécommandé
EP0701727A4 (fr) * 1993-06-04 1996-07-24 M & Fc Holding Co Inc Systeme duplex bidirectionnel et multimode de lecture d'instruments a distance et de telemetrie
EP0650151A1 (fr) * 1993-10-22 1995-04-26 Schlumberger Industries, Inc. Système radiofréquence de lecture de compteurs
DE19504587A1 (de) * 1995-02-11 1996-08-14 Abb Patent Gmbh Zweiwegkommunikationssystem für Energieversorgungsnetze
DE19624273A1 (de) * 1995-09-20 1997-03-27 Fraunhofer Ges Forschung Verbrauchserfassungssystem zur Fernablesung
WO1997011445A1 (fr) * 1995-09-20 1997-03-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Systeme de mesure de consommation pour releve a distance
US6115677A (en) * 1995-09-20 2000-09-05 Fraunhofer-Gesellschaft Zur Foderung Der Angewandten Forschung E.V. Consumption measurement system for remote reading
EP0834849A1 (fr) * 1996-08-31 1998-04-08 Amatsia Dr. Kashti Dispositif de mesure
WO1998010394A1 (fr) * 1996-09-06 1998-03-12 Innovatec Corporation Systeme de transmission de donnees a lecture automatique de compteur
EP0847163A1 (fr) * 1996-11-29 1998-06-10 Electrowatt Technology Innovation AG Dispositif pour l'essai et/ou la commande à distance d'un système
EP0847162A1 (fr) 1996-11-29 1998-06-10 Landis & Gyr Technology Innovation AG Unité d'interface avec entrelacement pour la transmission de données numériques par un réseau de communication cellulaire
WO1998024227A3 (fr) * 1996-11-29 1998-07-23 Electrowatt Tech Innovat Corp Configuration pour une installation telemesurable et/ou telecommandable
US7126494B2 (en) 1997-02-12 2006-10-24 Elster Electricity, Llc Remote access to electronic meters using a TCP/IP protocol suite
US7046682B2 (en) 1997-02-12 2006-05-16 Elster Electricity, Llc. Network-enabled, extensible metering system
GB2326002A (en) * 1997-06-06 1998-12-09 Centrepoint Technology Limited Remote reading of meters and sensors
EP0899898A3 (fr) * 1997-08-29 2003-07-09 Siemens Aktiengesellschaft Signal de données pour transmission sans fil de données entre des modules collecteurs de données de traffic et au moins une unité centrale
GB2344672A (en) * 1998-12-10 2000-06-14 British Gas Plc Meter interface
WO2003006924A1 (fr) * 2001-07-10 2003-01-23 Horst Ziegler Procede de collecte des donnees valeurs affichees aux compteurs et systeme de collecte de ces donnees
US6867707B1 (en) 2002-04-24 2005-03-15 Elster Electricity, Llc Automated on-site meter registration confirmation using a portable, wireless computing device
US7301476B2 (en) 2002-06-27 2007-11-27 Elster Electricity, Llc Dynamic self-configuring metering network
US7145474B2 (en) 2002-06-27 2006-12-05 Elster Electricity, Llc Dynamic self-configuring metering network
US7119713B2 (en) 2002-06-27 2006-10-10 Elster Electricity, Llc Dynamic self-configuring metering network
US7312721B2 (en) 2002-06-28 2007-12-25 Elster Electricity, Llc Data collector for an automated meter reading system
US7417420B2 (en) 2004-03-18 2008-08-26 Elster Electricity, Llc Switch to bypass optical diode for reducing power consumption of electrical meters
US7315162B2 (en) 2004-03-18 2008-01-01 Elster Electricity, Llc Reducing power consumption of electrical meters
US7227350B2 (en) 2004-03-18 2007-06-05 Elster Electricity, Llc Bias technique for electric utility meter
US7262709B2 (en) 2004-04-26 2007-08-28 Elster Electricity, Llc System and method for efficient configuration in a fixed network automated meter reading system
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GB9118030D0 (en) 1991-10-09
AU2433992A (en) 1993-03-16

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