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EP1261792A1 - Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite - Google Patents

Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite

Info

Publication number
EP1261792A1
EP1261792A1 EP01915093A EP01915093A EP1261792A1 EP 1261792 A1 EP1261792 A1 EP 1261792A1 EP 01915093 A EP01915093 A EP 01915093A EP 01915093 A EP01915093 A EP 01915093A EP 1261792 A1 EP1261792 A1 EP 1261792A1
Authority
EP
European Patent Office
Prior art keywords
transmitting
receiving device
receiving
further transmitting
transmitter
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.)
Granted
Application number
EP01915093A
Other languages
German (de)
English (en)
Other versions
EP1261792B1 (fr
Inventor
Alain Marc Bernard Brillon
Klaus Hofbeck
Wolfgang Piesch
Johannes Ilg
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.)
Continental Automotive GmbH
Continental Automotive France SAS
Original Assignee
Siemens AG
Siemens Automotive SA
Siemens Corp
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, Siemens Automotive SA, Siemens Corp filed Critical Siemens AG
Publication of EP1261792A1 publication Critical patent/EP1261792A1/fr
Application granted granted Critical
Publication of EP1261792B1 publication Critical patent/EP1261792B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00365—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit
    • G07C2009/0038—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit whereby the wake-up circuit is situated in the keyless data carrier
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

Definitions

  • the invention relates to a method for transmitting and receiving signals between at least a first transmitting and receiving device and at least one further transmitting and receiving device, in particular for unlocking and / or locking a vehicle, as well as transmitting and receiving devices and an arrangement thereof therefor.
  • Such methods and transmitting and receiving devices are used, for example, in vehicle technology in order to enable the unlocking of the vehicle or the vehicle doors and / or the deactivation of the anti-theft device in a manner which is as comfortable as possible for an operator.
  • the present invention is therefore based on the object of a method for transmitting and receiving signals between at least one first transmitting and receiving device and to create at least one further transmitting and receiving device, as well as a transmitting and receiving device and an arrangement therefor, which guarantee a high level of security against unauthorized interventions while at the same time minimizing energy consumption.
  • the method according to the invention it is now possible to set up a second communication link which is higher in energy consumption, but which offers a high level of protection against unauthorized access by directly or indirectly imitating an access code.
  • the high energy consumption advantageously occurs only during a predetermined, short time window lying in the ⁇ s range, so that the total energy consumption increases only imperceptibly due to this very short-term higher energy consumption, which arises only with a valid request signal.
  • the second communication link can be designed to be both bi- and unidirectional, and because of the short time interval, this link is also accessible to very energy-intensive transmission methods, such as, for example, very high frequencies, high amplitudes on the transmitter side, or very sensitive, energy-intensive receivers, for example constructed using measuring amplifier units is.
  • the construction of the second communication link as an LF system is particularly advantageous, in which the signal transmission takes place essentially by means of a magnetic inductive coupling. Since a base station located in a vehicle usually a certain range, for example, within 1 to 3 meters covered, to be, in which an ID transmitter is detectable, such systems are very energ 'IE consuming.
  • corresponding antennas for example loop antennas, can be used in the base station and possibly operated with high powers via power amplifiers.
  • the. Receivers are made more sensitive by means of a measuring amplifier unit, so that, in conjunction with normal LF transmitters (without power amplification), a range increase occurs and, in particular, a higher range can be achieved by means of the power-enhanced LF transmitters described above.
  • a magnetic inductive coupling is advantageously not influenced and disturbed by organic matter and reflections. Due to the predetermined time interval in a very small time window, faults outside this time window are also disregarded, so that these measures significantly increase the immunity to interference of the overall system. Due to the lack of shielding and reflection of the predominant magnetic field component, an exact range can also be set independently of locations and objects or people in this area, so that overreaches are advantageous and accordingly undesirable triggering effects are avoided.
  • the LF communication link is made possible in a corresponding range by using a measuring amplifier unit on the receiver side
  • transmission can also be carried out with less power on the transmitter side and energy consumption can be reduced on the transmitter side, so that the.
  • Energy source in the vehicle for example the battery, is less loaded.
  • a lower transmitter power also results in lower radiation exposure and thus less interference to other components as well as avoiding any health risks.
  • the received power is measured in the further transmitting and receiving device, that is to say, for example, an ID transmitter by means of a measuring device.
  • the further transmitting and receiving device that is to say, for example, an ID transmitter by means of a measuring device.
  • Various designs are conceivable for this, for example in the form of one or more threshold values, by reaching actions such as displaying this threshold value, storing the threshold value, evaluating a plurality of received threshold values or also transmitting such measurement results or even evaluations to the at least one first transmitting and receiving device , for example the base station in a vehicle, are possible.
  • the beginning of the predetermined time interval does not have to be the time of a correctly received one.
  • Request signal coincide, but can also be staggered by a predetermined time interval. It is also conceivable that a future point in time of the start of the Integrate time intervals as information in the request signal.
  • the duration of the predetermined time interval can be predetermined or adjustable via corresponding electronic devices, for example an RF link or corresponding digital counter in the ID transmitter, or can also be contained as information in the request signal.
  • the method according to the invention is particularly advantageous if it is carried out several times with different parameters and corresponding measurement results are determined.
  • the transmission power and / or receiver sensitivity can be changed and / or can be varied by means of locally different transmission ranges, for example by means of a plurality of antennas or combination antennas arranged differently with different radiation angles.
  • the corresponding measurement results can then be transmitted individually to the other transmitting and receiving device or collected in advance and transmitted in a block.
  • a further evaluation of these measurement results does not only take place in the at least first transmitting and receiving device, but also takes place in the further transmitting and receiving device before a transmission as the final or intermediate result.
  • field distortions and calibration values of the transmitting and receiving device can also be used for the most exact possible evaluation of the received field strength values by means of a table which is stored, for example, as a date in an evaluation unit.
  • the first communication link is advantageously a very low-energy communication link. route trained. This is the case, for example, with conventional RF systems in the MHz range, for example 433 MHz or 867 MHz, which are advantageously very space-saving and, because of their widespread use, can be implemented very inexpensively.
  • FIG. 1 shows a schematic block diagram of a base station located in a motor vehicle
  • Fig. 2 is a schematic block diagram of an ID transmitter.
  • the base station shown in FIG. 1 has a control unit 1, a transmitting unit 3, a receiving unit 5 and an LF transmitter, for example a ping generator 7.
  • the transmission unit 3 is here also connected to a schematically represented antenna 4, as is the receiver unit 5 with its antenna 6.
  • the base station has a so-called ping generator 7, which emits a very low-frequency field in the LF range, for example 100 to 300 kHz, with a predominantly magnetic field component, via its antenna 8, for example in the form of a loop antenna.
  • the ID transmitter shown in FIG. 2 has a control unit 10, a receiver unit 13, a transmitter unit 15, which are each connected to their antennas (receive antenna 14 and transmit antenna 16).
  • an LF receiver 17 is located in the ID transmitter instead of an LF transmitter, in the form of a ping receiver, which, via its receiving antenna 18 in cooperation with the ping generator 7 and the transmitting antenna 8 of the base station, is a magnetically inductive one Can generate coupling.
  • a combined transmitter and receiver unit with a transmitter and receiver antenna or separate transmitter and receiver antennas 14 and 16 can also be used instead of separate transmitter unit 15 and receiver unit 13.
  • bidirectional communication (first communication link) takes place via the transmitter units 3, 15 and receiver units 5, 13, for example in the low-energy RF range, whereby, as in conventional systems, one assumed certain proximity of an ID transmitter can be detected.
  • the base station when a ID transmitter is detected by means of the first communication link via this first communication link, the base station sends out a request signal which informs the ID transmitter that a specific a signal is transmitted within a short time window via a second communication link.
  • An LF link is selected as the communication link, which advantageously allows a magnetic inductive coupling, which is subject to the aforementioned disadvantages, such as shielding, reflection and unauthorized intervention to a lesser or no extent.
  • the base station uses its control unit 1 to switch on the ping generator 7, which emits the magnetic inductive signal via its loop antenna 8.
  • the ID transmitter has a measuring amplifier for correct reception of such a signal with low transmission power. which is not shown in FIG. 2.
  • this measuring amplifier which can be integrated in the ping receiver 17 or the control unit 10 or can be arranged as a separate unit in the path from the loop antenna 18 to the control unit 10, the sensitivity of the ping receiver 17 is correspondingly increased by a correct one To enable the construction of this magnetic inductive communication path within a desired range, for example several meters, in particular one to three meters.
  • the received power is determined using a measuring unit, not shown, for example in the form of one or different achievable threshold values.
  • a measuring unit not shown, for example in the form of one or different achievable threshold values.
  • the determined measurement result is then communicated to the base station by the ID transmitter via the first communication link, that is to say the transmitter 15, and is used by the base station when the reception is correct to unlock the doors and / or deactivate the anti-theft device.
  • a plurality of frame antennas 8 in the vehicle, so that one or more ping generators 7 connected to them from different locations in the vehicle, for example left door, right door, rear etc., transmission fields are sent and depending on the reception performance determined in the ID transmitter, which as a result is either communicated individually to the base station or collected in advance in the ID transmitter and possibly already subjected to a partial or full evaluation there, or in the base station are subjected to such an evaluation, the position of the ID transmitter, ie the direction with respect to the base station, can be detected.
  • the described exemplary embodiment describes the method according to the invention with the aid of a passive access system for a motor vehicle, this can of course also be applied to an active access system, that is to say the establishment of the first communication link due to the actuation of a button or the like in the ID transmitter.
  • the method according to the invention and an arrangement of the transmitting and receiving devices according to the invention for carrying out such a method are not limited to vehicle technology, but can be used in many areas such as building technology, monitoring technology, counting systems, etc.
  • such access controls are also for
  • the invention can also be used to reliably detect a transmitting and receiving device for monitoring moving objects, such as people where such a moving object is located, or how often it passes certain positions (counting systems) become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, entre un premier et un autre dispositif émetteur-récepteur, un signal de demande est transmis par l'intermédiaire d'une première voie de communication bidirectionnelle, une seconde voie de communication est établie pour un intervalle de temps prédéterminé, en fonction dudit signal de demande, et la puissance de réception des autres dispositifs émetteurs-récepteurs est mesurée au moyen d'un dispositif de mesure.
EP01915093A 2000-03-09 2001-03-07 Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite Expired - Lifetime EP1261792B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10011509 2000-03-09
DE10011509 2000-03-09
PCT/DE2001/000870 WO2001066886A1 (fr) 2000-03-09 2001-03-07 Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite

Publications (2)

Publication Number Publication Date
EP1261792A1 true EP1261792A1 (fr) 2002-12-04
EP1261792B1 EP1261792B1 (fr) 2012-01-11

Family

ID=7634107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01915093A Expired - Lifetime EP1261792B1 (fr) 2000-03-09 2001-03-07 Procede d'emission et de reception, en particulier pour la detection d'un indicateur d'identite

Country Status (4)

Country Link
US (1) US7023321B2 (fr)
EP (1) EP1261792B1 (fr)
JP (1) JP4727892B2 (fr)
WO (1) WO2001066886A1 (fr)

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Also Published As

Publication number Publication date
JP2003526030A (ja) 2003-09-02
US20030016140A1 (en) 2003-01-23
EP1261792B1 (fr) 2012-01-11
WO2001066886A1 (fr) 2001-09-13
JP4727892B2 (ja) 2011-07-20
US7023321B2 (en) 2006-04-04

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