EP1997355B1 - Autonome einheit für ein netzwerk aus messsensoren, netzwerk mit dieser autonomen einheit und kommunikationsprotokoll dieses netzwerkes - Google Patents

Autonome einheit für ein netzwerk aus messsensoren, netzwerk mit dieser autonomen einheit und kommunikationsprotokoll dieses netzwerkes Download PDF

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Publication number
EP1997355B1
EP1997355B1 EP07731798A EP07731798A EP1997355B1 EP 1997355 B1 EP1997355 B1 EP 1997355B1 EP 07731798 A EP07731798 A EP 07731798A EP 07731798 A EP07731798 A EP 07731798A EP 1997355 B1 EP1997355 B1 EP 1997355B1
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EP
European Patent Office
Prior art keywords
autonomous
autonomous unit
network
housing
unit according
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Not-in-force
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EP07731798A
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English (en)
French (fr)
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EP1997355A2 (de
Inventor
Michel Petit
Stéphane URRUTIA
Hervé MICHON
Jean-Marc Bernex
Philippe Mirande-Iriberry
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Lyracom
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Lyracom
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection

Definitions

  • the present invention relates to an autonomous unit for a measurement sensor network, to a network incorporating at least one autonomous unit and to a communication protocol of said network.
  • the accuracy of a measurement over a relatively large geographic area is related to the number of measurement points.
  • the control of lighting or extinguishing of the public lighting for a sector of a city can be triggered from a value measured by a single brightness sensor, in particular a cell photovoltaic, measuring sunshine.
  • the measured value is often a rough approximation of the brightness of the area to be illuminated which does not allow to optimize the management of the lighting.
  • one solution is to increase the number of measurement points to obtain a more representative measured value.
  • this solution requires the installation of a wired network to ensure the power supply of the measurement sensors and data transmission.
  • the installation of a wired network is relatively expensive. In some cases, it may even be impossible.
  • the measurement sensors are grafted onto a network having a power supply, for example a street lamp network of a public lighting, it is possible to capture a portion of this electrical energy to power the sensors of measure, and use said network power supply to transmit the data using the carrier current method.
  • a power supply for example a street lamp network of a public lighting
  • this solution is not satisfactory because it induces overconsumption and the transmitted measurements can be tainted by error.
  • Batteries or batteries can be provided to ensure the autonomy of said sensors.
  • this solution is not satisfactory because these power supply means have a limited life, which induces significant maintenance to ensure their replacement.
  • batteries are generally a source of significant pollution.
  • the document GB-A-2 392 326 (MALTHUSE CHRISTOPHER LAURIE ) describes an autonomous unit (138, Fig. 2A) incorporating at least one measuring means (130) and capable of integrating into a network of autonomous units ( Fig. 3 ) and communicating by means of communication means (105) the measured value (s) with at least one coordinator (230, Fig. 3 ), characterized in that it comprises autonomous power supply means (135) comprising means for transforming an external (solar) energy into electrical energy, in particular a photovoltaic panel using solar energy, and storage means (140) of said energy thus transformed.
  • Document US-A-5 822 200 shows means for transforming an external energy into electrical energy, in particular a photovoltaic panel, and means for storing said energy thus transformed using means comprising at least two capacitors.
  • document D2 does not describe: (a) a device with capacitor switching, (b) protected by means of protection.
  • the present invention aims at overcoming the drawbacks of the prior art by proposing an autonomous unit incorporating at least one measurement sensor, making it possible to multiply the measurement points, not requiring the installation of a dedicated wired network and / or significant maintenance and using renewable energy.
  • the subject of the invention is an autonomous unit incorporating at least one measurement means, comprising autonomous power supply means comprising means for transforming an external energy into electrical energy, in particular a photovoltaic panel using the energy solar, and capable of integrating into a network of autonomous units and communicating by means of communication the measured value or values, characterized in that it comprises means for storing said electrical energy comprising a switching device capacitors, at least two capacitors, protected by means of protection.
  • the present invention is now described applied to the management of a public lighting network. Nevertheless, the invention may have other applications for which it is necessary to disseminate several measurement sensors over a geographical area.
  • a network consisting of at least one autonomous unit 20 incorporating at least one means is provided.
  • 18 measurement including brightness, and at least one coordinator, capable of communicating directly or indirectly with said autonomous units 20 and collect the measured values.
  • the coordinator is connected to the control means of said lighting network.
  • the autonomous unit may comprise one or more measuring means, in particular any type of sensor or probe, operating at low voltage, enabling it to perform point-by-point measurements on a network equipped with said autonomous units 20 in the purpose of communicating, in the same way as for the measurements of brightness, said measurements to the coordinator.
  • measuring means in particular any type of sensor or probe, operating at low voltage, enabling it to perform point-by-point measurements on a network equipped with said autonomous units 20 in the purpose of communicating, in the same way as for the measurements of brightness, said measurements to the coordinator.
  • the autonomous unit 20 is independent of a wired network, in particular of the power circuit for supplying electrical energy to the various light points of the street lighting, which does not cause overconsumption of the lighting network during the operation of the network.
  • the measurements do not suffer any disturbance due to any interference on said power circuit during communication with the coordinator, as may be experienced by, for example, carrier current systems.
  • each autonomous unit 20 has at least one means 18 for measuring, in particular means for measuring brightness, communication means 30, capable of communicating with the coordinator and / or another autonomous unit 20 and feeding means autonomous 38.
  • the autonomous power supply means 38 provide the energy required by the other components.
  • the autonomous power supply means 38 comprise means for transforming an external renewable energy 42, in particular solar energy, into electrical energy and storage means 44 for said electrical energy.
  • the device could use wind power or any other renewable energy.
  • the autonomous unit 20 operates thanks to renewable energies so as to register in the field of sustainable development and urban ecology.
  • the means for transforming an external energy source 42 in particular a photovoltaic panel, transforming the solar energy into electrical energy, can be used as means for measuring brightness and means for detecting malfunction and lighting of a light point.
  • each autonomous unit 20 is equipped with a housing 36 having an upper portion 48 and a lower portion 50 between which are provided sealing means 46, in particular a silicone seal.
  • the upper portion 48 of the housing 36 comprises a transparent wall 52 behind which are positioned the means for transforming an external energy 42.
  • a one-way valve 54 is disposed on one of the faces of the housing 36, the opening of said valve being outwardly of the housing 36.
  • the housing 36 comprises fastening means 26 adapted to the support on which the autonomous unit 20 is fixed.
  • the housing 36 can take various forms, a spherical shape being preferentially recommended for the discretion of the autonomous units 20.
  • said housing 36 contains a printed circuit 56 grouping the electrical energy storage means 44, the communication means 30 of the autonomous unit 20, the synchronization means 58, as well as possibly the means for executing the instructions. 40 and the storage means 32, the calibration means 62, the power supply regulation means 64, the temperature measurement means 60, the secondary communication means 68.
  • the voltage supplied by the electrical energy storage means 44 must be regulated so as to provide a stable supply to said various elements of the printed circuit 56.
  • the energy storage means 44 are relayed by the regulation means 64 of the power supply.
  • Said regulation means 64 of the power supply are in particular made using a DC / DC converter.
  • calibration means 62 may be used to calibrate the value of the voltage supplied by the means for transforming an external energy 42, which voltage is directly proportional to sunshine.
  • These calibration means 62 are in particular made using a voltage divider bridge.
  • the electrical energy storage means 44 are composed of a capacitor switching device 70 and protection means 72 of said capacitor switching device 70.
  • the protection means 72 of the capacitor switching device 70 are controlled by a control command from the means for executing instructions 40, a control command which allows the switching of said device between a serial circuit of the capacitor switching device 70, having at least two capacitors, and parallel mounting of said capacitor switching device 70.
  • the protection means 72 of said capacitor switching device 70 are made using low-voltage detection means and field-effect transistors, more particularly N-channel or P-channel MOSFETs, in order to avoid overloading. said capacitors when they have reached their charging voltage, the power supply of the capacitor switching device being cut off.
  • This capacitor switching device 70 furthermore has switching means, made by field effect transistors, more particularly N-channel or P-channel MOSFETs, referenced T8N, T8P and T2A on the Figures 3A and 3B .
  • Said switching means have, for the purposes of this capacitor switching device 70, particularly fast switching speeds, in particular to have the minimum of pressure drop across the capacitors.
  • capacitor switching device 70 The operation of the capacitor switching device is illustrated in Figures 4A and 4B .
  • the number of capacitors is set at two, but this capacitor switching device 70 may comprise more than one pair of capacitors of the moment that the charging voltage supplied by the means for transforming an external energy 42 is provided accordingly.
  • the Figure 4A represents the series circuit of the capacitor switching device 70.
  • the switching means T8N and T8P being open and T2A closed, the capacitors C1 and C2 are fed in series by a voltage U, resulting from the means for transforming an external energy 42.
  • This series assembly is intended to perform the charging of said capacitors C1 and C2.
  • the protection means 72 of said capacitor switching device 70 switch off the power supply from the means for transforming an external energy 42 and, as illustrated in FIG. Figure 4B the switching means T2A open, which causes the closing of the switching means T8N and T8P.
  • the capacitor switching device 70 has stored the electrical energy, and the two capacitors C1 and C2 are now connected in parallel to discharge their capacitance and start delivering a voltage V substantially equal to half of said voltage U , the regulation means 64 of the power supply.
  • the electrical supply thus produced provides the electrical power required by the other components, in particular the measuring means 18, the means for executing the instructions 40, in particular a microprocessor, and the synchronization means 58, in particular an integrated time clock circuit.
  • Programmable real, storage means 32 including EEPROM type
  • the temperature measuring means 60 including a circuit incorporating a temperature probe
  • secondary communication means 68 in particular an optical transceiver for transmitting and receiving information and instructions.
  • the storage means 32 are used to store the information specific to each measurement point, whether it is information derived from brightness measurements, temperature measurements, or any other measurements. , as well as data sent to the means for executing the instructions 40.
  • the data thus stored can be reused for the establishment of an ignition reference curve for example, or for the learning of the measurement means.
  • Learning means the establishment of a database of measurements obtained by the various measurement means available in an autonomous unit 20 and available in the storage means 32, this database making it possible to establish a map said measurements on a time scale for example being able to be hourly, daily, weekly or allowing to cross the different measurements between them and to deduce from them possible relations.
  • the advantages provided by the network of autonomous units 20 are dependent on a communication protocol, more particularly radio, adapted to the low voltage operating mode of the autonomous units 20. Because of the autonomy of the autonomous units 20, this protocol of communication is at low level of energy consumption. This low power consumption is based on the programmable synchronization means 58 which define a time-stamped operation of the autonomous units 20, based on a periodic request / response method of each autonomous unit 20, this communication protocol being therefore time-stamped.
  • the synchronization means 58 are in the form of a real-time clock integrated circuit whose frequency deviations of the crystal oscillator due to temperature variations can be compensated, thereby obtaining a reliable time stamping. with negligible drift over time.
  • the communication protocol provides a periodic synchronization time interval during which the autonomous units synchronize two by two thanks to the programmable synchronization means 58, the synchronization means 58 enabling the autonomous units to synchronize with each other or with the coordinator, and through their means of communication 30.
  • the protocol is bidirectional in the sense that the transmission of the signal is carried out downwardly then rising on the network of autonomous units 20.
  • the protocol defines a communication method carried out so that, during the downward phase, the signal transmitted by the communication means 28 of the coordinator, in particular a radio transceiver, or retransmitted to the communication means 30 of a first autonomous unit 20, in particular that located furthest upstream of the network in the vicinity of the coordinator, then successively autonomous unit 20 in autonomous unit down on the network, to the last autonomous unit 20 of said network, located the most downstream, and, during the rising phase succeeding a downward phase, the signal goes upstream the downstream network upstream, from autonomous unit 20 in autonomous unit, until returning to the coordinator.
  • the autonomous unit 20 During a rising phase M or downward D and thanks to the synchronization means 58, the autonomous unit 20 knows when it must be in reception, referenced R in figure 5 . During this reception period R, the communication means are listening and are therefore likely to receive a signal from a transmitter and the instructions it contains.
  • the communication means By following the reception period R and after the end of the reception of the signal, the communication means in turn transmit the signal, during a transmission period EM, to the communication means of the autonomous unit being in a period of reception.
  • the execution means 40 carry out the instructions transmitted in the signal, in particular measurements, then during the emission period EM of the rising phase M, they transmit the data corresponding to the instructions to the means of communication 30.
  • the protocol is bidirectional to beacons.
  • the protocol is tagged as each autonomous unit transmits a beacon, or message, to a specific EM transmission period, bearing the network identifier, the transmitter identifier, the number of the time slot , date and time.
  • the beacon is the means used by each autonomous unit 20 to synchronize with another autonomous unit 20 or the coordinator, said synchronization being effected in pairs.
  • the temporal accuracy of the emission period EM is essential to prevent sudden variations causing the stall of the tail of the network. Said accuracy of the emission period EM depends on the clock stability of each autonomous unit 20, this stability being obtained by compensating in temperature by the temperature measuring means 60 the high-precision clock defined by the synchronization means 58 programmable.
  • the communication protocol uses several signal transmission frequencies, a frequency however being reserved to synchronize or resynchronize the autonomous units 20 between them.
  • This synchronization frequency is used to create a signaling link which is used to re-synchronize an autonomous unit 20.
  • an autonomous unit 20 In case of isolation of an autonomous unit 20, it performs its own search synchronization. An autonomous unit 20 declares itself isolated when it no longer sees a tag several times in a row. There are three modes synchronization search from self declaration of isolation. A quick mode that consists in remaining in the reception period for the isolated autonomous unit 20 after the rising phase M to find the signaling link signaling phase, the probability of finding the signaling beacon being directly related to the quality of the signal. Beyond the time of presence of the signaling link, since it is useless to continue the search, the isolated autonomous unit 20 then goes into the slow search mode which consists in waiting for the next reception transmission cycle to scan the semaphore channel in a time equivalent to that of the fast search. The last search mode is established at each time slot where an autonomous unit 20 having lost the channel attached thereto will perform a close sequence to the second of synchronization cycles for one minute to give an order of ideas.
  • a child parent relationship is created between the autonomous unit 20 in research, called child, and the autonomous unit 20 or the coordinator, called said parent, who accepts it as part of the network.
  • the child inscribes in his means of storage 32 the coordinates of his parent.
  • an autonomous unit 20 is completely isolated and can then erase the coordinates stored by the storage means 32 to perform a connection procedure to the network, this procedure involved in the case of the disappearance of the parent corresponding to a destruction or replacement of an autonomous unit 20.
  • Attachment to a parent is a stable privileged relationship. There is no reason to change parents.
  • a parent standalone unit can accept multiple child standalone units as part of the manufacturing parameters. Each autonomous 20 child unit is identified separately. All stand-alone children's units listen to the same parent stand-alone unit during the same time interval. The different autonomous units 20 children of the same parent unit 20 then work on their own time interval and do not see each other.

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  • Arrangements For Transmission Of Measured Signals (AREA)
  • Communication Control (AREA)

Claims (9)

  1. Autonome Einheit (20), die wenigstens ein Messmittel (18) enthält, umfassend Mittel zur eigenständigen Versorgung (38), welche Mittel zum Umwandeln einer Fremdenergie (42) in elektrische Energie aufweisen, insbesondere ein die Sonnenenergie nutzendes Photovoltaikpanel, und die geeignet ist, in ein Netz aus autonomen Einheiten integriert zu werden und dank Übertragungsmitteln (30) den oder die gemessenen Werte zu übertragen, dadurch gekennzeichnet, dass sie Mittel zum Speichern (44) der elektrischen Energie aufweist, die eine durch Schutzmittel (72) geschützte Vorrichtung (70) zum Schalten von Kondensatoren mit wenigstens zwei Kondensatoren umfasst.
  2. Autonome Einheit nach Anspruch 1, dadurch gekennzeichnet, dass die Vorrichtung (70) zum Schalten von Kondensatoren Schaltmittel (T8N, T8P und T2A) umfasst, die zwischen folgendem umschalten:
    - einer Reihenschaltung von Kondensatoren C1 und C2, die in Reihe mit einer Spannung U aus den Mitteln zum Umwandeln einer Fremdenergie (42) versorgt werden,
    - und einer Parallelschaltung der Kondensatoren C1 und C2, wobei die Schutzmittel (72) die Zufuhr aus den Mitteln zum Umwandeln einer Fremdenergie (42) unterbrechen.
  3. Autonome Einheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Mittel zum Regulieren (64) der durch die Mittel zum Speichern der elektrischen Energie (44) bereitgestellten Stromversorgung umfasst.
  4. Autonome Einheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Kalibrierungsmittel (62) aufweist, um den Wert der durch die Mittel zum Umwandeln einer Fremdenergie (42) gelieferten Spannung zu kalibrieren.
  5. Autonome Einheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Synchronisierungsmittel (58) umfasst, um einen Zeitstempelbetrieb der autonomen Einheit zu ermöglichen.
  6. Autonome Einheit nach Anspruch 5, dadurch gekennzeichnet, dass sie Temperaturmessmittel (60) umfasst, um die Synchronisierungsmittel (58) in Abhängigkeit der gemessenen Temperatur einzustellen.
  7. Autonome Einheit nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ein Gehäuse umfasst, in dem die sie bildenden Elemente angeordnet sind, wobei das Gehäuse ein unidirektionales Ventil (54) aufweist, das ermöglicht, innerhalb des Gehäuses (36) einen niedrigeren Luftdruck als außerhalb des Gehäuses (36) zu haben.
  8. Netz, das wenigstens eine autonome Einheit (20) nach einem der vorhergehenden Ansprüche sowie wenigstens einen Koordinator umfasst, der geeignet ist, die Messwerte zu sammeln.
  9. Kommunikationsprotokoll für ein Netz, das wenigstens eine autonome Einheit (20) nach einem der Ansprüche 1 bis 7 sowie wenigstens einen Koordinator umfasst, dadurch gekennzeichnet, dass es zeitgestempelt arbeitet, wobei die autonomen Einheiten sich paarweise synchronisieren, um ein Signal absteigend, dann aufsteigend über das Netz aus autonomen Einheiten zu übertragen, und dass jede autonome Einheit zu einer gegebenen Sendezeit eine Kennzeichnung sendet, welche die Kennung des Netzes, die Kennung des Senders, die Nummer des Zeitintervalls, das Datum sowie die Uhrzeit trägt.
EP07731798A 2006-03-22 2007-03-22 Autonome einheit für ein netzwerk aus messsensoren, netzwerk mit dieser autonomen einheit und kommunikationsprotokoll dieses netzwerkes Not-in-force EP1997355B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650987A FR2899035B1 (fr) 2006-03-22 2006-03-22 Unite autonome pour un reseau de capteurs de mesure, reseau incorporant ladite unite autonome et protocole de communication dudit reseau
PCT/FR2007/050985 WO2007107678A2 (fr) 2006-03-22 2007-03-22 Unite autonome pour un reseau de capteurs de mesure, reseau incorporant ladite unite autonome et protocole de communication dudit reseau

Publications (2)

Publication Number Publication Date
EP1997355A2 EP1997355A2 (de) 2008-12-03
EP1997355B1 true EP1997355B1 (de) 2009-10-28

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EP07731798A Not-in-force EP1997355B1 (de) 2006-03-22 2007-03-22 Autonome einheit für ein netzwerk aus messsensoren, netzwerk mit dieser autonomen einheit und kommunikationsprotokoll dieses netzwerkes

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EP (1) EP1997355B1 (de)
AT (1) ATE447315T1 (de)
DE (1) DE602007002995D1 (de)
FR (1) FR2899035B1 (de)
WO (1) WO2007107678A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MA39538A1 (fr) * 2016-12-19 2018-06-29 Univ Int Rabat Système électronique de télémétrie et de maintenance corrective pour éclairage intelligent

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0239653A1 (de) * 1986-03-29 1987-10-07 TELETTRA Telefonia Elettronica e Radio S.p.A. System zur Speisung und Steuerung von Positionsleuchten mit niedriger Stromstärke
US5822200A (en) * 1997-04-21 1998-10-13 Nt International, Inc. Low level, high efficiency DC/DC converter
WO2000076034A1 (fr) * 1999-06-08 2000-12-14 Lempi@ S.A. Reseau apte a la telegestion de l'eclairage urbain et autres, et elements et procedes de mise en oeuvre
WO2001081166A1 (en) * 2000-04-20 2001-11-01 Chris Antico Remote synchronisation
WO2002017691A1 (en) * 2000-08-22 2002-02-28 Acuity Brands Inc. Luminaire diagnostic and configuration identification system
EP1251721A1 (de) * 2001-04-04 2002-10-23 Eles Semiconductor Equipment S.P.A. Überwachungssystem von Strassenlampen
GB2392326A (en) * 2002-08-20 2004-02-25 Christopher Laurie Malthouse System for monitoring street lighting
DE102004042093B3 (de) * 2004-08-30 2006-03-02 Pfeiffer, Ulrich, Dipl.-Ing.(FH) Leuchte

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Publication number Publication date
DE602007002995D1 (de) 2009-12-10
EP1997355A2 (de) 2008-12-03
FR2899035B1 (fr) 2009-06-12
WO2007107678A2 (fr) 2007-09-27
FR2899035A1 (fr) 2007-09-28
ATE447315T1 (de) 2009-11-15
WO2007107678A3 (fr) 2007-11-08

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