Siemens Aktiengesellschaft

Michael Stippler

Klaus Hofbeck

Birgit Rösel

Thomas Klement

Arnd Stielow

Peter Gold

A single high-frequency transmitter emits radiation in a vehicle () comprising several seats (), said high-frequency radiation being reflected depending on whether a seat is occupied, transmitted to a receiver and evaluated with regard to the radiation intensity. In addition, the reliability of the identification is increased, even when the occupant is out of position, by the provision of at least one reflector () per seat in or on an allocated seat-belt ().

System and method for identifying seat occupancy in a vehicle

A remote control, particularly for wireless remote control of a closing device in a motor vehicle, has a first transmitter for outputting an optical signal, and a second transmitter for outputting a radio signal. The two transmitters are able to be activated for signal output by at least one actuation element. An input of the first transmitter and/or of the second transmitter is connected to a clock transmitter in order to output the optical signal and/or the radio signal in pulsed fashion at particular intervals of time in order to save energy. Also an associated remotely controllable device and a full remote control configuration are disclosed.

Remote control, remotely controllable device and remote control configuration

An antenna system, especially for an anti-theft system of a motor vehicle. A primary magnetic field is produced by a primary coil ( ). In the vicinity of the primary coil ( ), a coupling coil ( ) is disposed which is connected by a flexible conductor ( ) with a secondary coil ( ). By the magnetic connection of the primary field a secondary field can be produced through the secondary coil ( ), which due to the distributed installation of the secondary coils ( ) can act specifically in areas in which the primary field is not acting.

Antenna system especially for an anti-theft system of a motor vehicle

A first challenge signal whose reception power is measured in a portable code transmitter is transmitted by a vehicle-mounted transmission unit. Subsequently, a second challenge signal is transmitted under changed transmission conditions, and the reception power of the second challenge signal is also measured. Doors are unlocked, or the internal combustion engine is started only if the received power levels are also different. Otherwise, one or more challenge signals are transmitted once more under changed transmission conditions.

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Schwandorf, Germany

Michael Stippler