Method for a Start and Access System for a Motor Vehicle
AssigneeContinental Automotive GmbH
InventorStefan Hermann
Life of this patent
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Abstract
A method for start and access verification of a motor vehicle by means of a mobile identification transmitter (3) with an evaluation unit arranged in the identification transmitter (3). At least two antennas (1, 2) arranged in different places on the vehicle in any order: each emit time independently an electromagnetic signal which is measured by a measuring device in the identification transmitter (3), and each simultaneously emit an electromagnetic signal which is measured by the measuring device in the identification transmitter (3). Thus, the security of start and access systems of motor vehicles is increased.
Claims13
A method for start and access verification of a motor vehicle by means of a mobile identification transmitter with an evaluation unit arranged in the identification transmitter, the method comprising the following steps executed in any order:
- at least two antennas arranged in different places on the vehicle each emit a first electromagnetic signal time independently from each other, which is measured by a measuring device in the identification transmitter;
- and
- the at least two vehicle-side antennas simultaneously emit a second electromagnetic signal which is measured by the measuring device in the identification transmitter.
A method for start and access verification of a motor vehicle by means of a mobile identification transmitter with an evaluation unit arranged in the identification transmitter, the method comprising the steps of:
- at least two antennas arranged in different places on the vehicle each emit a first electromagnetic signal time independently from each other, which is measured by a measuring device in the identification transmitter;
- and
- the at least two vehicle-side antennas simultaneously emit a second electromagnetic signal which is measured by the measuring device in the identification transmitter;
- the measuring device measures the field strengths of the emitted electromagnetic signals of the first antenna and of the second antenna as components in each case, with the components being arranged at right angles to each other;
- the measured field strengths of the first antenna and of the second antenna are transferred by the identification transmitter to a vehicle-side evaluation unit;
- and
- the measured components of the first antenna are written as a first vector, the measured components of the second antenna as a second vector and the measured components the two antennas as a sum vector.
A method according to claim 7, wherein the steps of emitting the first and second electromagnetic signals are executed in any order.
A method for start and access verification of a motor vehicle by means of a mobile identification transmitter with an evaluation unit arranged in the identification transmitter, the method comprising steps:
- emitting first electromagnetic signals by each of at least two antennas arranged in different places on the vehicle in a time independent fashion,
- measuring the first electromagnetic signals by a measuring device in the identification transmitter;
- and
- emitting simultaneously second electromagnetic signals by the at least two vehicle-side antennas, and
- measuring the second electromagnetic signals by the measuring device in the identification transmitter.
Dependencies are inferred from the claim text.