A method and apparatus for detecting a valid ultrasound signal in an ultrasound system of a vehicle

摘要

Method for detecting a valid ultrasonic signal (2) in an ultrasound system of a vehicle comprising the steps of: detecting (200) an ultrasound signal (2) by means of an ultrasound sensor, filtering (210) the ultrasound signal (2) by means of a first filter (3) and at least one second filter (4), wherein the first filter (3) generates a first filter signal (7) and the second filter (4) generates a second filter signal (8), characterized in that in the method step of the filtering (210) the ultrasonic signal ( 2) is simultaneously filtered by the first filter (3) and the second filter (4), wherein the first filter (3) is a filter matched to the ultrasonic sensor, the second filter (4) being a filter mismatched with the ultrasonic sensor, the first filter signal (7) represents a threshold value and the method comprises the further steps of: comparing (220) the second filter signal (8) with the threshold value and recognizing the valid Ultra sound signal (2) and outputting (230) of the valid ultrasonic signal (2) as an output signal (12) when the second filter signal is less than the threshold value.