高分解能環境認識のためのフェーズドアレイ送信機とMUSIC法を組み合わせた空中超音波センサシステム

抄録

The goal of this research is to develop a system that recognizes the surrounding environment by the ultrasonic sensor in high resolution. In previous research, we proposed the ultrasonic sensor system consists of an ultrasonic phased array transmitter and a microphone array with MUSIC method. In this paper, the experiments are conducted under the conditions that the five objects are at the same distance and at different distances. Experimental results show that it is possible to estimate the object positions with an angular resolution of at least 20 deg. Furthermore, we confirmed that it is effective to vary the threshold exponentially for determining the number of estimated objects according to the distance of each object.