Ultrasonic range finder for support of human gestures recognition

The paper presents two methods of echo bearing determination. They exploit simple approaches to echo detection. To compute an echo bearing the first method uses measurements obtained by applying signal threshold detection. The second one is based on a phase shift. The methods are a starting point for a construction of an ultrasonic range finder. A project of this sensor is motivated by its usage for support of a gesture recognition and an effective and fast obstacle detection for a mobile robot navigation.