Method and device for determining the speed of a vehicle

摘要

Device (10) for determining the speed of a motor vehicle or bicycle comprises a first ultrasound receiver (R1), a second ultrasound receiver (R2), a unit (12) for measuring the running times of the ultrasound signals and an electronic evaluation unit (14) for determining the speed via the running times. An independent claim is also included for a method for determining the speed of a motor vehicle or bicycle. Preferred Features: The ultrasound signals are ultrasound impulses. Short ultrasound impulses with a determined impulse duration are used. The ultrasound receivers are positioned at different positions.