超音波による3次元座標測定

抄録

This paper describes a method of three dimensional coordinate measurement in which the coordinates of a moving transmitter are calculated using ultrasonic distances of some fixed receivers to the transmitter. First, to realize motion measurement, the four-point method is introduced which uses four receivers for reducing the coordinate calculation time instead of three receivers of the conventional triangulation. The measuring speed by the method is 6.5Hz. Secondly, an ultrasonic coordinate measuring machine is introduced. It is shown that profile measurements are possible without using any motion mechanisms. Lastly, a method is discussed of expanding the measuring space by uniting some small spaces measured by four receivers. As an example, a 1m×1m × 1m space is made of eight small spaces using thirteen receivers.