EP2126872A2 - Capteur à économie d'énergie et interrogeable à distance sans fil - Google Patents

Capteur à économie d'énergie et interrogeable à distance sans fil

Info

Publication number
EP2126872A2
EP2126872A2 EP08716973A EP08716973A EP2126872A2 EP 2126872 A2 EP2126872 A2 EP 2126872A2 EP 08716973 A EP08716973 A EP 08716973A EP 08716973 A EP08716973 A EP 08716973A EP 2126872 A2 EP2126872 A2 EP 2126872A2
Authority
EP
European Patent Office
Prior art keywords
potential difference
modulation
measured value
sensor antenna
energy
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Withdrawn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
EP08716973A
Other languages
German (de)
English (en)
Inventor
Klaus Pistor
Robert Baumgartner
Daniel Evers
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2126872A2 publication Critical patent/EP2126872A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
    • G08C25/02—Arrangements for preventing or correcting errors; Monitoring arrangements by signalling back receiving station to transmitting station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/758—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/14—Calling by using pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/70—Arrangements in the main station, i.e. central controller
    • H04Q2209/75—Arrangements in the main station, i.e. central controller by polling or interrogating the sub-stations

Definitions

  • the present invention relates to a device according to the preamble of the main claim and a method according to the preamble of the independent claim.
  • the meter is powered by the voltage to be measured and thus loads the measuring point; 2.) The measuring device has an additional power supply and can thus acquire the measured value without loading the measuring point.
  • a common example of the first option is a rotary coil instrument that converts a voltage into a pointer movement.
  • a conventional example is a battery-powered handheld multimeter in which the voltage is measured and displayed extremely high impedance.
  • the measurement result can also be transmitted by wire to another location where the measurement result is displayed.
  • an active transmitter is usually required.
  • Such an active transmitter must be connected to a power supply, which according to the first possibility is rarely provided, as energy extraction from the voltage to be measured is conventionally only possible to a very limited extent and is insufficient to use such an active transmitter ,
  • a necessary power supply is generally provided either by batteries that have only a limited life, or alternatively by wired and potentially isolated power supplies.
  • Wire connections necessary for the power supply at least partly negate the advantages of wireless communication.
  • a conventional sensor that does not require its own power supply can be used to measure purely dynamically changing voltages.
  • Such devices are for example self-powered microwave backscatter transponders (EAMBT). With these conventional devices, a measurement of static voltages is not possible.
  • wirelessly interrogatable voltage measurements must have their own power supply, or in a conventional wirelessly interrogatable voltage measurement, only dynamically varying voltages, for example, using an EAMBT, can be detected.
  • the object is achieved by a device according to the main claim and a method according to the independent claim.
  • a wireless device for detecting a measured value of an electrical potential difference, the can also be referred to as a wireless voltage sensor, does not use its own transmitter for transmitting measured values, but instead modulates the reflection properties of a sensor antenna.
  • An interrogator transmits high frequency (RF) energy or signals to the sensor antenna and receives the radio frequency (RF) energy or signals reflected therefrom over a radio link.
  • RF radio frequency
  • This conventional backscatter energy self-sufficient microwave backscatter transponder EAMBT
  • EAMBT energy self-sufficient microwave backscatter transponder EAMBT
  • the output signal in turn modulates a reflection modulation means.
  • the measured value is not directly represented by the reflection properties of the sensor antenna, but by the properties of the reflection modulation.
  • a reflection modulation device is provided whose output signal determines the reflection properties of the sensor antenna.
  • the modulation generating device itself is supplied with energy by means of the electrical potential difference to be measured.
  • the present invention is characterized in that the reflection modulation device is preceded by a modulation generating device, which converts it into an alternating voltage signal, in particular at a time-unchanged electrical potential difference, that are interrogated remotely by the interrogator in accordance with the EAMBT principle without additional energy from the voltage sensor can.
  • the electrical potential difference to be detected is static, that is, it is constant over time. This means that in addition to dynamic measured values, static measured values can also be transmitted to the interrogator.
  • the modulation signal of the modulation generating means is modulated by means of frequency and / or by means of pulse width. That is, corresponding to the electrical potential difference to be detected corresponding frequencies and / or pulse widths are generated.
  • the frequency generated by the modulation generating means is typically provided in the range up to a few 10OkHz. Since the modulation generating means only produces relatively low modulation frequencies, and since of the
  • the power consumption of the voltage sensor is much smaller than in conventional solutions. In this way, the power supply of the device for detecting a measured value of an electrical potential difference and for wireless retrieval of the measured value is substantially simplified.
  • a separate power supply device can be avoided. This minimum required energy can in many cases be provided by the potential difference itself to be measured.
  • a separate energy supply device serving for supplying energy to the modulation generating device is provided, which is supplied with electrical energy by the potential difference to be detected. That is, the electrical energy provided by the potential difference to be measured supplies the separate power supply device and the device or the voltage sensor with sufficient energy.
  • the separate energy supply device is supplied with electrical energy by means of a separate energy source, in particular an electric battery, solar cell, thermal generator and / or vibration generator.
  • a separate energy source in particular an electric battery, solar cell, thermal generator and / or vibration generator.
  • the energy supply device can provide electrical energy in addition to the potential difference. This means that the electrical energy provided by the potential difference to be measured supplies, if appropriate also only temporarily, a separate energy supply device which continuously supplies the device or the voltage sensor with sufficient energy. In this way, equally low voltages can be measured advantageously, which are not sufficient to power the sensor and therefore could not be used.
  • the sensor antenna electrically connected to a Radio Frequency Identification (RFID) tag, which may also be referred to as a tag or tag.
  • RFID Radio Frequency Identification
  • a conventional surface wave identification system can be used for this purpose.
  • the RFID tag electrically connected to the sensor antenna is used to check the functionality of the radio link. That is, it can also be done in addition to monitor the functionality of the radio link, so that a sensor failure can be distinguished from a failure of the radio link.
  • these are provided in such a way that a very fast measured value transmission can be created.
  • This can be done, for example, by using a large radio frequency bandwidth of the radio frequency (RF) signals radiated by the interrogator. That is, with a suitable design of the interrogator, a very fast measurement value transmission can take place.
  • RF radio frequency
  • further physical quantities are detected, which can be converted into the electrical potential difference with little or no additional energy supply.
  • the device according to the invention or the voltage sensor can also be used for measuring other physical variables, if these variables can be converted into an electrical voltage without additional power supply or, in the case of a battery supply, the conversion correspondingly absorbs little power, as it is given in the voltage sensor itself.
  • these other physical quantities are illuminance and / or
  • Rotation speed These quantities can be converted into an electrical potential difference or into an electrical voltage, for example rotational speed according to the dynamo principle or illuminance by the photoelectric effect, without additional energy supply.
  • physical variables such as rotation angle can be converted, for example by means of potentiometer resistor or variable capacitor. These physical quantities require a small power supply that can be created, for example, by means of an electrical battery.
  • 1 shows a first embodiment of a device according to the invention for detecting a measured value of an electrical potential difference and for wireless query of the measured value.
  • 2 shows a second embodiment of a device according to the invention for detecting a measured value of an electrical potential difference and for wireless query of the measured value.
  • FIG. 1 shows an exemplary embodiment of a voltage sensor S or a device S for detecting a measured value of an electrical potential difference 1 and for wirelessly interrogating the measured value.
  • the device S has a modulation generating device 2, a reflection modulation device 3 and a sensor antenna 4. These devices must be provided at least for a functional voltage sensor S. Additional elements are a separate power supply 8 and a RFID (Radio Frequency Identification) - Tag 7. An interrogator 5 is created in addition. Between sensor antenna 4 and the interrogator 5, a radio link 6 is provided.
  • the voltage sensor S according to the exemplary embodiment thus has five separate devices.
  • Reference numeral 1 denotes the electric potential difference whose measured value is to be detected.
  • the potential difference 1 is an electrical voltage. This voltage is to be detected by the device S or by the voltage sensor S and transmitted to the interrogator 5. In this case, the power consumption of the voltage sensor S is low and the measured value of the electrical potential difference 1 can be interrogated wirelessly. This is done as follows:
  • the electrical potential difference 1 or the electrical voltage 1 is fed to the modulation generating device 2.
  • the electrical potential difference 1 is applied to a power supply device 8.
  • the power supply device 8 is generated separately.
  • the energy supply of the modulation generating device 2 can also be created directly by tapping the electrical potential difference 1 through the modulation generating device 2. According to the
  • Embodiment supplies the power supply device 8, the modulation generating device 2 with electrical energy or electrical power.
  • the modulation generation device 2 generates a modulation signal that is output to the reflection modulation device 3.
  • the measured value of the electrical potential difference 1 in the form of a frequency and / or pulse width is included.
  • the reflection modulation device 3 receives this modulation signal and modulates the reflection properties of the sensor antenna 4 on the basis thereof.
  • the sensor antenna 4 is thereby modulated in such a way that the reflection properties of the sensor antenna 4 change in accordance with the value of the electrical potential difference 1.
  • the measured value of the potential difference 1 is interrogated by means of the high-frequency energy radiating and again receiving interrogator 5 from the sensor antenna 4 along the radio link 6.
  • the voltage sensor S according to the present invention is particularly advantageously suitable for detecting static electrical potential differences 1.
  • the modulation generation device 2 converts the static potential difference value 1 into a dynamic, that is, a time-varying, signal.
  • a static electrical potential difference value 1 can be converted into a frequency signal and interrogated with the interrogator 5 used here, in particular according to the EAMBT principle.
  • a Radio Frequency Identification (RFID) tag 7 is electrically connected to the reflection device 3 and to the sensor antenna 4.
  • the RFID tag 7 influences the reflection properties of the sensor antenna (4), but not as a function of a voltage, but rather, for example, on an identification number specified during the production of the RFID tag.
  • the RFID tag 7 By means of the RFID tag 7, the measuring point or the voltage sensor S or the device can be identified. For this purpose, the corresponding information is stored in the day 7 and retrievable by the interrogator 5. Furthermore, by means of the RFID tag 7, the functionality of the radio link 6 can be checked by means of queries by the interrogator 5.
  • the power supply device 8 serving to supply power to the modulation generating device is supplied with electrical energy by the potential difference 1 to be detected.
  • the energy supply device 8 is provided by means of battery, solar cell and / or vibration generator and / or other conventional energy sources.
  • the electrical potential difference 1 can also be regarded as a voltage source 1.
  • this voltage source 1 is part of the device S according to the invention or of the voltage sensor S according to the invention means, the voltage source 1 is included in the voltage sensor S. According to the exemplary embodiment according to FIG. 1, the voltage source 1 is arranged outside the voltage sensor S. Electrical connections or lines are provided from the voltage source 1 to the modulation generating device 2 and to the power supply device 8.
  • FIG. 2 shows a second exemplary embodiment of a voltage sensor S or a device S for detecting a measured value of an electrical potential difference 1 and for wirelessly interrogating the measured value.
  • the device S has a modulation generating device 2, a reflection modulation device 3 and a sensor antenna 4. These devices must be provided at least for a functional voltage sensor S. Additional elements such as a separate power supply 8 and a RFID (Radio Frequency Identification) tag 7 are missing.
  • An interrogator 5 is created. Between sensor antenna 4 and the interrogator 5, the radio link 6 is hen hen.
  • the voltage sensor S according to this embodiment thus has three separate devices.
  • Reference numeral 1 denotes the electric potential difference whose measured value is to be detected. In FIG. 2, the same reference numerals to FIG. 1 designate the same means or devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

La présente invention concerne un dispositif (S) destiné à enregistrer une valeur de mesure, en particulier une différence de potentiel électrique (1), et permettant la lecture sans fil de cette valeur de mesure. La présente invention comprend un dispositif de modulation de réflexion (3) dont le signal de sortie détermine les propriétés de réflexion d'une antenne de capteur (4), de sorte que la valeur de mesure de la différence de potentiel (1) peut être lue par l'antenne de capteur (4), au moyen d'un dispositif d'interrogation (5) émettant et recevant des signaux haute fréquence, sur une liaison hertzienne (6). La présente invention se caractérise en ce qu'un dispositif générateur de modulation (2) est placé en amont du dispositif de modulation de réflexion (3), lequel dispositif générateur de modulation convertit une différence de potentiel électrique (1), en particulier constante dans le temps, en un signal de tension alternative pouvant être appelé à distance par le dispositif d'interrogation (5) sans énergie supplémentaire du capteur de tension (S). La présente invention est particulièrement appropriée pour enregistrer des intensités lumineuses, des vitesses de rotation ou des angles de rotation.
EP08716973A 2007-02-27 2008-02-20 Capteur à économie d'énergie et interrogeable à distance sans fil Withdrawn EP2126872A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710009545 DE102007009545A1 (de) 2007-02-27 2007-02-27 Drahtlos fernabfragbarer energiesparender Sensor
PCT/EP2008/052064 WO2008104487A2 (fr) 2007-02-27 2008-02-20 Capteur à économie d'énergie et interrogeable à distance sans fil

Publications (1)

Publication Number Publication Date
EP2126872A2 true EP2126872A2 (fr) 2009-12-02

Family

ID=39646046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08716973A Withdrawn EP2126872A2 (fr) 2007-02-27 2008-02-20 Capteur à économie d'énergie et interrogeable à distance sans fil

Country Status (3)

Country Link
EP (1) EP2126872A2 (fr)
DE (1) DE102007009545A1 (fr)
WO (1) WO2008104487A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007011232A1 (de) 2007-03-06 2008-09-11 Siemens Ag Verfahren zum Abfragen eines Messwertes
US8362961B2 (en) 2009-11-03 2013-01-29 Honeywell International Inc. Modulated antenna for wireless communications
DE102012204022A1 (de) * 2012-03-14 2013-09-19 Siemens Aktiengesellschaft Gasturbine und Verfahren zu deren Betrieb

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
YU39528B (en) * 1974-10-21 1984-12-31 M Silvin Leskovar Measuring-transmitting device high-tension lines
JP4448214B2 (ja) * 1999-11-02 2010-04-07 重雄 山本 照合装置
DE10210037A1 (de) * 2002-03-07 2003-10-02 Siemens Ag Aktiver Backscatter-Transponder, Kommunikationssystem mit einem solchen und Verfahren zum Übertragen von Daten mit einem solchen aktiven Backscatter-Transponder
DE10239303B4 (de) * 2002-08-27 2006-08-03 Siemens Ag Energieautark modulierter Backscatter-Transponder
DE102004062132A1 (de) * 2004-12-23 2006-07-13 Atmel Germany Gmbh Backscatter Transponder
DE102005037582A1 (de) * 2005-08-09 2007-02-22 Siemens Ag Lokalisierbarer und energieautarker Backscatter-Transponder zur Erfassung von Messgrößen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008104487A2 *

Also Published As

Publication number Publication date
DE102007009545A1 (de) 2008-08-28
WO2008104487A3 (fr) 2008-11-27
WO2008104487A2 (fr) 2008-09-04

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