Principle Investigation on Direct Measurement Method of Linear Speed by Applying the Principle of Optical Gyroscope

Abstract

　　　Measurement of speed has a very important role in various industrial and academic fields. In general, the speed measurement is limited to either the measurement of the relative speed with respect to the reference point or the integration of the acceleration. In the measurement method using the reference point, the reference point needs to be immovable, so it cannot be used for vibration measurement or the like. On the other hand, the method of integrating acceleration has a problem that errors accumulate. Angular velocity can be measured directly by using optical gyroscope, and it is used for attitude control of aircraft. In this study, a direct measurement method of straight travelling speed by applying the principle of optical gyroscope was proposed. As a result of the verification experiment of the measurement principle, correlation between the linear speed and the frequency change of interference light output was obtained, and the possibility of measuring the linear speed by the proposed method was shown.