Electromagnetic non-contact measurement method for rotation speed and movements

The paper deal with a new measurement method for rotation speed and movements of shafts using non-contact eddy current sensors. The main advantages and shortcomings of this method are considered. The prospects of use of this method for various practical applications are analyzed. Special attention in the work is paid to errors of measurements that arise during the using of this technique and resistance of this method to impact of noise. Possible paths for improvement of characteristics of this method are presented. Now proposed method assumes determination of rotation speed with inaccuracy about 0.1 RPM and the space provision of a shaft with inaccuracy of 0.1 mm when using only one sensor.