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

摘要

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.