GB2372534A - Transponder key with rechargeable internal battery - Google Patents

Transponder key with rechargeable internal battery Download PDF

Info

Publication number
GB2372534A
GB2372534A GB0203893A GB0203893A GB2372534A GB 2372534 A GB2372534 A GB 2372534A GB 0203893 A GB0203893 A GB 0203893A GB 0203893 A GB0203893 A GB 0203893A GB 2372534 A GB2372534 A GB 2372534A
Authority
GB
United Kingdom
Prior art keywords
key
internal battery
transponder
charging voltage
storage station
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
GB0203893A
Other versions
GB0203893D0 (en
GB2372534B (en
Inventor
Christopher Richard Bottomley
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.)
Jaguar Land Rover Ltd
Original Assignee
Land Rover Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Land Rover Group Ltd filed Critical Land Rover Group Ltd
Publication of GB0203893D0 publication Critical patent/GB0203893D0/en
Publication of GB2372534A publication Critical patent/GB2372534A/en
Application granted granted Critical
Publication of GB2372534B publication Critical patent/GB2372534B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • B60R25/246—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user characterised by the challenge triggering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/40—Features of the power supply for the anti-theft system, e.g. anti-theft batteries, back-up power supply or means to save battery power
    • B60R25/406—Power supply in the remote key
    • 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
    • G07C2009/00373—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 lock
    • 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
    • G07C2009/00579—Power supply for the keyless data carrier
    • G07C2009/00587—Power supply for the keyless data carrier by battery
    • 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
    • G07C2009/00579—Power supply for the keyless data carrier
    • G07C2009/00603—Power supply for the keyless data carrier by power transmission from lock
    • G07C2009/00611—Power supply for the keyless data carrier by power transmission from lock by using inductive transmission

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

Abstract

A transponder key 16 for a security system, e.g. vehicle door lock and ignition system, comprises a rechargeable internal battery 16d and means 16a, 16b for inhibiting the transmission of signals from the key in response to detection of a charging voltage for recharging the internal battery of the transponder. A storage station 20 comprising a battery charger 22 suitable for recharging the internal battery 16d of the transponder key 16 is also disclosed. Preferably the charging voltage is applied to the key 16 by means of electrical contacts, or is induced electromagnetically in a coil provided within the key. The key 16 may include means for rectifying the induced voltage to generate the charging voltage for the internal battery. Preferably the storage station includes a radio shield surrounding the key to prevent it from receiving or transmitting signals whilst in storage.

Description

VEHICLE SECURITY SYSTEM
The present invention relates to a transponder key that incorporates a rechargeable battery for use in a vehicle security system having passive entry and mobilisation.
Vehicle security systems are known in which the driver is merely required to carry an electronic key. When the driver operates the door handle to gain access to the vehicle, a transmitter in the vehicle sends an interrogation signal to the electronic transponder key. The key then responds with an access code and when the correct code in received and recognised by the vehicle, all the vehicle systems are enabled to allow the driver to enter the vehicle and start the engine.
The advantage of such a system is that the driver is merely required to carry the key on his person and there is no need to do anything with it such as inserting it into a slot or pocket. This makes for great ease of use and convenience.
A problem with security systems having a passive entry and mobilisation transponder key is that the key can be made to transmit its access code when it is not in the vicinity of the vehicle. A would be thief can operate the vehicle door handle while the driver is in his residence and use a radio link to pick up the vehicle interrogation signal and relay it to a transmitter unit which is placed near the front door of the residence. It is quite likely that the driver will have left the passive transponder key near the front door and if it should respond to the relayed interrogation signal, then its transmission can be picked up, stored for duplication or relayed to the vehicle to allow immediate unauthorised access.
With a view to mitigating the foregoing disadvantage, the present invention provides a transponder key for a security system, which key incorporates a rechargeable internal battery, wherein the key includes means for inhibiting the transmission of signals from the key in response to detection of a charging voltage for recharging the internal battery of the transponder.
In accordance with a second aspect of the invention, there is provided a transponder key for a security system which key incorporates a rechargeable internal battery in combination with a storage station that incorporates a battery charger, wherein the key includes means for inhibiting the transmission of signals from the key in response to detection of a charging voltage.
The internal battery may either be recharged using contacts on the key or by inducing a voltage electromagnetically in a coil that is built into the key.
The invention will now be described further, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a block diagram of a security system using a passive entry and mobilisation key, and Figure 2 shows a charging station for a contact-less key.
In the security system of Figure 1, when a handle 10 is operated it transmits a signal to a micro-processor 12. This then sends a signals which is transmitted by a transmitter circuit 14 to a passive key 16, which is itself a transponder. The key 16, when interrogated by the vehicle, sends an access code to a vehicle receiver circuit 18 which passes the received signal to the micro-processor 12. If the correct access code is received, the micro-processor 12 enables the various vehicle systems 20, which include such
items as the door locks and the ignition system to allow the vehicle to be entered and driven away.
As earlier mentioned, if by nefarious means a would be thief arranges for an interrogation signal to be transmitted to the key 16 when it is not in use, the key will be tricked into transmitting its access code, which can then the detected and stored. The invention therefore is concerned with preventing operation of the key when it is in storage.
To this end, it is proposed to store the key when it is not in used in a storage station that includes a charger for the internal battery of the key. While the key 16 detects the presence of a charging voltage its internal transmitter is disabled so that it cannot respond to any interrogation signal. If desired, the internal radio receiver of the key may be disabled instead of, or in addition to, the disablement of the internal transmitter, as the inability to detect an interrogation signal would in itself act to prevent the transmission of an access code.
Figure 2 shows a transponder key 16 arranged within a storage station 20. The storage station 20 comprises a slot into which the key can be inserted. It is preferred to make the casing of the storage station of an electrically conductive material as this will act to shield the key and thereby prevent the transmission and reception of radio signals even if the battery charger is not switched on.
The key 16 has a rechargeable battery 16d without any external contacts. Instead, the key 16 incorporates a charging circuit 16a in addition to its internal microprocessor 16b and its transceiver circuit 16c.
The storage station 20 is surrounded by a coil 22 which induces an a. c. voltage in a coil of the charging circuit 16a. This inductively coupled charging voltage is rectified
and regulated by the charging circuit 16a and used to charge the battery 16d which powers the micro-processor 16b and the transceiver circuit 16c. It is alternatively possible to provide the storage station and the key with electrical contacts in lieu of the inductive coupling, in which case the charging voltage can be d. c. and need not be rectified by the key.
In the presence of a charging field (or a charging voltage if the key and the storage station have electrical contacts) the charging circuit 16a supplies an input to the micro-processor 16b to disable transmission of an access code. This can be done by disabling the transmitter/ receiver 16c, the microprocessor 16b or both while the key is in storage and the battery 16d is being recharged.

Claims (6)

1. A transponder key for a security system, which key incorporates a rechargeable internal battery, wherein the key includes means for inhibiting the transmission of signals from the key in response to detection of a charging voltage for recharging the internal battery of the transponder.
2. In combination, a transponder key for a security system, which key incorporates a rechargeable internal battery, and a storage station that incorporates a battery charger, wherein the key includes means for inhibiting the transmission of signals from the key in response to detection of a charging voltage.
3. A combination as claimed in claim 2, wherein the charging voltage is applied to the key by means of electrical contacts.
4. A combination as claimed in claim 2, wherein a voltage is induced by the storage station electromagnetically in a coil that is built into the key, the key additionally comprising means for rectifying the induced voltage to generate a charging voltage for the internal battery.
5. A combination as claimed in any of claims 2 to 4, wherein the storage station includes a radio shield surrounding the key to prevent it from receiving or transmitting radio signals while in the storage station even when no charging voltage is present.
6. A combination as claimed in any of claims 2 to 5, wherein the means for inhibiting the transmission of signals by the key includes means for disabling any one or more of a transmitter, a receiver and a microprocessor that form part of the key.
GB0203893A 2001-02-19 2002-02-19 Vehicle security system Expired - Fee Related GB2372534B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0104020A GB0104020D0 (en) 2001-02-19 2001-02-19 Vehicle security system

Publications (3)

Publication Number Publication Date
GB0203893D0 GB0203893D0 (en) 2002-04-03
GB2372534A true GB2372534A (en) 2002-08-28
GB2372534B GB2372534B (en) 2004-06-16

Family

ID=9909019

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0104020A Ceased GB0104020D0 (en) 2001-02-19 2001-02-19 Vehicle security system
GB0203893A Expired - Fee Related GB2372534B (en) 2001-02-19 2002-02-19 Vehicle security system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0104020A Ceased GB0104020D0 (en) 2001-02-19 2001-02-19 Vehicle security system

Country Status (1)

Country Link
GB (2) GB0104020D0 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003091943A1 (en) * 2002-04-24 2003-11-06 Marconi Intellectual Property (Us) Inc Energy source recharging device and method
EP1970265A2 (en) 2007-03-15 2008-09-17 Jaguar Cars Limited Security system for a motor vehicle
US7952323B2 (en) 2006-12-22 2011-05-31 Em Microelectronic-Marin S.A. Battery charger operating “all or nothing” with a protective power supply circuit for monolithic integrated circuits using the antenna energy
WO2013030648A1 (en) * 2011-08-29 2013-03-07 Toyota Jidosha Kabushiki Kaisha Mobile terminal charging system and mobile terminal charging method
CN103238262A (en) * 2011-03-07 2013-08-07 松下电器产业株式会社 In-vehicle charger, and program therefor
US20140009261A1 (en) * 2011-08-26 2014-01-09 Panasonic Corporation In-vehicle charger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5254996A (en) * 1990-11-29 1993-10-19 Mercedes-Benz Ag Charge monitoring system for a remote control system
US5561331A (en) * 1994-04-28 1996-10-01 Honda Giken Kogyo Kabushiki Kaisha Ignition key device having chargeable storage cell supplying selectively attachable remote unit
WO1998000319A1 (en) * 1996-06-19 1998-01-08 Microchip Technology Incorporated Improved remote keyless entry device
FR2760777A1 (en) * 1997-03-11 1998-09-18 Sagem Rechargeable control key for Cars
JPH10250531A (en) * 1997-03-11 1998-09-22 Toyota Motor Corp Key device for vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5254996A (en) * 1990-11-29 1993-10-19 Mercedes-Benz Ag Charge monitoring system for a remote control system
US5561331A (en) * 1994-04-28 1996-10-01 Honda Giken Kogyo Kabushiki Kaisha Ignition key device having chargeable storage cell supplying selectively attachable remote unit
WO1998000319A1 (en) * 1996-06-19 1998-01-08 Microchip Technology Incorporated Improved remote keyless entry device
FR2760777A1 (en) * 1997-03-11 1998-09-18 Sagem Rechargeable control key for Cars
JPH10250531A (en) * 1997-03-11 1998-09-22 Toyota Motor Corp Key device for vehicle

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003091943A1 (en) * 2002-04-24 2003-11-06 Marconi Intellectual Property (Us) Inc Energy source recharging device and method
US7952323B2 (en) 2006-12-22 2011-05-31 Em Microelectronic-Marin S.A. Battery charger operating “all or nothing” with a protective power supply circuit for monolithic integrated circuits using the antenna energy
EP1970265A2 (en) 2007-03-15 2008-09-17 Jaguar Cars Limited Security system for a motor vehicle
GB2447484A (en) * 2007-03-15 2008-09-17 Ford Global Tech Llc Security system for a motor vehicle with hand gesture recognition
US7710245B2 (en) 2007-03-15 2010-05-04 Jaguar Cars Limited Security system for a motor vehicle
GB2447484B (en) * 2007-03-15 2012-01-18 Jaguar Cars Security system for a motor vehicle
EP2685588A1 (en) * 2011-03-07 2014-01-15 Panasonic Corporation In-vehicle charger, and program therefor
CN103238262A (en) * 2011-03-07 2013-08-07 松下电器产业株式会社 In-vehicle charger, and program therefor
EP2685588A4 (en) * 2011-03-07 2014-08-06 Panasonic Corp In-vehicle charger, and program therefor
US9266483B2 (en) 2011-03-07 2016-02-23 Panasonic Intellectual Property Management Co., Ltd. In-vehicle charger, and program therefor
US9440602B2 (en) 2011-03-07 2016-09-13 Panasonic Intellectual Property Management Co., Ltd. Method of operating an in-vehicle charger, and an in-vehicle charger mounted to a vehicle
CN103238262B (en) * 2011-03-07 2017-04-05 松下知识产权经营株式会社 Onboard charger and its program
US20140009261A1 (en) * 2011-08-26 2014-01-09 Panasonic Corporation In-vehicle charger
US9235940B2 (en) * 2011-08-26 2016-01-12 Panasonic Intellectual Property Management Co., Ltd. In-vehicle charger
WO2013030648A1 (en) * 2011-08-29 2013-03-07 Toyota Jidosha Kabushiki Kaisha Mobile terminal charging system and mobile terminal charging method

Also Published As

Publication number Publication date
GB0203893D0 (en) 2002-04-03
GB2372534B (en) 2004-06-16
GB0104020D0 (en) 2001-04-04

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Legal Events

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20131128 AND 20131204

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20190219