To provide a method for detecting an obstacle by means of reflected ultrasonic waves, by means of which different obstacle types can be distinguished.SOLUTION: The method for detecting an obstacle by means of reflected ultrasonic waves, in particular as parking assistance for vehicles, comprises: transmitting an ultrasonic burst transmission signal by an ultrasonic transmitter to a detection area to be observed and receiving an ultrasonic signal reflected by an obstacle in the detection area by an ultrasonic receiver as an ultrasonic reception signal. In the ultrasonic reception signal, at least one echo is detected resulting from an obstacle. The echo section of the ultrasonic reception signal belonging to the echo is transformed from the time domain into the frequency domain. The frequency spectrum of the echo section is then examined for the presence of at least one of a plurality of predetermined spectral characteristics, wherein each spectral characteristic is representative of a predetermined obstacle type or a plurality of predetermined obstacle types. Finally, the echo section is allocated to a predetermined obstacle type.SELECTED DRAWING: Figure 5
【課題】異なる障害物タイプを区別可能な、反射超音波による障害物検出方法の提供。【解決手段】特には車両向け駐車支援としての、反射超音波による障害物検出方法は、超音波送信機によって、観察対象となる検出エリアへと超音波バースト送信信号を送信する手順と、超音波受信機によって、検出エリア内の障害物で反射された超音波信号を超音波受信信号として受信する手順と、を含む。超音波受信信号において、障害物に由来する1以上のエコーが検出される。エコーに属する超音波受信信号のエコー区間は、時間領域から周波数領域へと変換される。エコー区間の周波数スペクトルに複数の所定のスペクトル特性のうち1以上が存在するかどうか検査される。各スペクトル特性は、所定の障害物タイプ及び場合によっては複数の所定の障害物タイプのうち1以上を表す。最後に、エコー区間は、所定の障害物タイプに割り当てられる。【選択図】図5
METHOD FOR DETECTING OBSTACLE BY MEANS OF REFLECTED ULTRASONIC WAVE
反射超音波による障害物検出方法
2019-12-12
Patent
Elektronische Ressource
Japanisch
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