| 摘要 |
According to the invention a driver assistance system for assisting a driver of a vehicle 1 is proposed, having at least one sensor group 5, 60, 70, which comprises at least one first ultrasonic sensor 10, 10' of a first type and at least one second ultrasonic sensor 20, 20' of a second type. The ultrasonic sensors are disposed in such a way that they have at least partially overlapping sensing ranges 12, 22. According to the invention the ultrasonic sensors of the first type are configured to sense a short range and the ultrasonic sensors of the second type are configured to sense a long range. A control unit 50 drivers the sensors and evaluates the echo signals, which are combined to produce a continuous and gap-free sensing range. The groups of sensors can be placed at both the front and rear of the vehicle. The short range sensors can have a lower sensitivity than the long range sensors, and can be operated at a different frequency. Alternatively the signals can be emitted separately from one another in respect of time. |
