Suppression Efficiency of the Correlated-noise and Drift of Self-oscillating Pseudo-differential Eddy Current Displacement Sensor

Vikram Chaturvedi, Johan Vogel, Stoyan Nihtianov
2016 Procedia Engineering  
The suppression efficiency of the correlated noise and drift of self-oscillating front-end circuit in a pseudodifferential eddy-current displacement sensor (ECDS) is investigated using COMSOL and MATLAB. The transfer characteristic of the sensor coil, excited at 200 MHz, is obtained through a FE model in COMSOL. The characteristic is linearized to a second-order fit around a standoff distance to the target (x so nonlinearity of the interface is modelled in MATLAB. It is found that, in order to
more » ... that, in order to tolerate 1 % drift in the oscillator amplitude, a maximum 2nd range around x so
doi:10.1016/j.proeng.2016.11.312 fatcat:etxhk5wbg5hjfns75dlalvs47y