Detector for vehicle seat, has evaluating unit to detect object or person occupying seat of vehicle, and belt sensor connected to evaluating unit to detect if safety belt has been fastened

• Main Authors: ROSEL BIRGIT, HOFBECK KLAUS, PFAU KLAUS
• Format: Patent
• Language: English; French
• Published: 01.04.2005
• Edition: 7
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PERFORMING OPERATIONS; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEATS SPECIALLY ADAPTED FOR VEHICLES; TESTING; TRANSPORTING; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

The detector has an evaluating unit to detect an object or a person (7) occupying a seat (10) of a vehicle from the signal propagation delay between the transmission and reception of high-frequency signals, information contained in the high-frequency signals, and a received signal strength. A belt sensor is connected to the evaluating unit to detect if a safety belt (20) has been fastened. The safety belt is disposed to secure the object or person on the seat. The evaluating unit is connected to a high-frequency transmitter and to a high-frequency receiver which can be arranged individually or as a common transceiver (1) inside a vehicle. Several reflectors (6) are disposed in or on the seat for reflecting high-frequency signals and to cause the high-frequency signals to traverse the object or person on the seat at least partially attenuated. An independent claim is also included for detecting an object or a person on a seat of a vehicle. Le dispositif comprend un récepteur-émetteur (1) qui émet des signaux HF qui sont réfléchis par des réflecteurs (6) placés dans les sièges (10). Des sièges occupés sont reconnus à l'aide de temps de propagation des signaux et/ou des caractéristiques du réflecteur et/ou des intensités de réception. En plus, il est déterminé au moyen d'un capteur de ceinture (25, 26) si la ceinture de sécurité (20) est attachée.