音響の周波数を利用した変位センサの開発 : 段差パイプおよびテーパ段差パイプを用いた場合

抄録

Simplified, low cost and precise sensors are required in industrial factories. This paper deals with the development of a simple, low cost and precise sensor used to detect the displacement and position of a physical solid. Sound generated when compressed air is blown onto the open-ended face of the pipe. The sound frequency varies with the displacement of a substance which is placed close to another open-ended face of pipe. This principle is adopted in this sensor. In order to improve the features of this sensor small, pipes with sharp drop and taper differences in the inner diameter are used in the experiment. Also, the sounding mechanism of the pipe used as a sensor is analyzed.