Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/16—Indicators for switching condition, e.g. "on" or "off"
  • H01H9/168—Indicators for switching condition, e.g. "on" or "off" making use of an electromagnetic wave communication
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H35/00—Switches operated by change of a physical condition
  • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Definitions

• the invention relates to a tamper-proof RFID switch for use in vehicles and a method for operating such a tamper-proof RFID switch according to the features of the independent claims.
• a movable Tell is arranged relative to the vehicle, it being essential for reasons of operational safety and to avoid dangerous conditions, the position of the movable part with respect to the vehicle to which the movable Part is attached to capture.
• the movable part for ensuring the operation of the vehicle or to avoid hazards to occupants of the vehicle in a certain position (target position) must be arranged relative to the vehicle.
• Hall switch, reed switch, microswitch, potentiometer and the like have already become known in the prior art for detecting this desired position. These have, such.
• As the potentiometer the disadvantage that they do not work wear.
• other devices such as Hall switch or reed switch work without contact and thus wear-free, However, it is possible to manipulate these devices, so that they carry a high risk potential.
• a tamper resistant RFID switch for use in vehicles, wherein the vehicle has at least one part movable relative to the vehicle whose position relative to the vehicle is detected by the RFID switch and the movable part comprises the RFID switch having influencing element.
• the solution is thus based on the use of modified and known RFID systems.
• an influencing element is provided on a movable part of the vehicle, which influences the electric field of the RFID switch in his presence by radio, so that this influence can be evaluated by a downstream control unit.
• the RFID switch generates a first signal in the presence of the influencing element and a second signal, which differs from the first signal, is generated when the
• This system according to the invention thus provides sufficient reaction distance, a large influenceability of the control lobes by special shaping of the antenna of the RFID switch and a programmability by appropriate algorithms and in addition a tamper resistance by checking the transmitted identifiers.
• the element influencing the RFID switch has a programmable memory. It is also conceivable that the RFID switch also has a programmable memory on the detection side. In this case, it is of particular advantage that the two programmable memories are filled with the same content, so that with the same content that can be checked when the influencing element is in the detection range of the RFID switch, it can be checked whether the to the RFID switch, which is arranged on the vehicle, associated influencing element is in the detection area or not or whether it is another influencing element z. B. from another movable part. This makes it possible, via the associated and uniquely identifiable components such as the RFID switch and its associated influencing element on an association between a vehicle and its movable part, which is part of ensuring.
• the element influencing the RFID switch is temporarily wirelessly connected from the outside to a programmer element and can be brought into at least two different switching states.
• the programmable memory of the influencing Element es an identifier einprogrammierbar or programmed for example workshop side, so that it can be ensured that the movable part of the vehicle on which or in which the influencing element is arranged actually belongs to this vehicle and this identifier is not readily from a normal User of the vehicle can be changed.
• a method for operating a tamper-proof RFID switch in which the transceiver is switched to the so-called teach-in mode by a key tag which is only available in the workshop area, the next valid tag being inserted being considered as future valid identifier is stored.
• the programmable memory of the RFID switch influencing element is programmed via a programming element (key day) from the outside or in such a state that when the clasp is inserted into the lock receptacle whose identifier (ie the identifier of the RFID switch ) is transferred into the memory of the influencing element, so as to ensure that this clasp (with the influencing element) and the Lock receptacle (with the associated RFID switch, to which a control unit is connected) belong together.
• This data transfer or learning process is also called teach-in mode (teach-in or teach-in mode). This means that the following options are available for the manipulation-proof merging of RFID switches and the associated influencing element:
• both the programmable memory of the RFID switch and the programming memory of the associated influencing element can be provided from the outside wirelessly by means of a programming element with the same identifiers.
• a query can be made by a downstream control device, whether the two identifiers belong to each other or not.
• these two identifiers to be compared with each other do not have to be identical, so that it is also conceivable that the identifier of the RFID switch is assigned a specific other identifier of the associated influencing element. If these two different but mutually identical identifiers match, this can be detected by the downstream control unit and a corresponding action triggered. In the case of the buckle, this action may be to show the driver whether the buckle is closed or not.
• an identifier to be stored in the influencing element, which is then learned by the RFID switch (and, if applicable, by the downstream control device) when the influencing element first enters the detection range of the RFID system. Switch arrives. This learning process is then in the RFID switch and / or in the control unit executed and terminated, so that afterwards also identifiers are stored both in the influencing element and in the RFID switch, which reflect their affiliation. For example, if another influencing element with a different identifier in the detection range of this RFID switch, this can be detected and by means of the control unit z. For example, it may be stated that another (wrong) movable element is in this detection area or that a corresponding warning is issued.
• the advantages of the RFID switch according to the invention and its operating method can be seen in the fact that large switching distances (up to several meters) can be realized that they are tamper-proof, that they are fahlbedienungsrank that also accessories of the vehicle is detectable and continue the expansion stage ( Equipment) of the vehicle is detectable.
• a clear association between the movable part of the vehicle and the vehicle itself can be determined tamper-proof, so that it can be avoided that inferior spare parts are used, as a rule, original spare parts for the operational safety of the vehicle are mandatory.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Lock And Its Accessories (AREA)
• Air Bags (AREA)

Applications Claiming Priority (1)

Publications (2)

Family

ID=41334489

Family Applications (1)

Country Status (2)

Cited By (1)

Family Cites Families (5)

• 2009
  • 2009-08-28 DE DE102009038996A patent/DE102009038996A1/de not_active Withdrawn
  • 2009-08-28 EP EP09011030A patent/EP2159809A3/fr not_active Withdrawn

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