Print Email Facebook Twitter Suppression Efficiency of the Correlated Noise and Drift of Self-oscillating Pseudo-differential Eddy Current Displacement Sensor Title Suppression Efficiency of the Correlated Noise and Drift of Self-oscillating Pseudo-differential Eddy Current Displacement Sensor Author Chaturvedi, V. (TU Delft Electronic Instrumentation) Vogel, J.G. (TU Delft Electronic Instrumentation) Nihtianova, S. (TU Delft Electronic Instrumentation) Date 2016-09-01 Abstract The suppression efficiency of the correlated noise and drift of self-oscillating front-end circuit in a pseudo-differential 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 (xso) of 55 μm. The nonlinearity of the interface is modelled in MATLAB. It is found that, in order to tolerate 1% drift in the oscillator amplitude, a maximum 2nd harmonic distortion (HD2) of the interface has to be less than −72 dB when the sensor HD2 is −51.5 dB for 5 μm displacement range around xso = 55 μm. Subject displacementsensoreddy-currentdemodulatoroscillatordriftnonlinearityfinite elelement To reference this document use: http://resolver.tudelft.nl/uuid:20eb746b-2982-41c9-868f-28ea27c83663 DOI https://doi.org/10.1016/j.proeng.2016.11.312 ISSN 1877-7058 Source Procedia Engineering, 168, 946-949 Event Eurosensors 2016, 2016-09-04 → 2016-09-07, Budapest, Hungary Part of collection Institutional Repository Document type journal article Rights © 2016 V. Chaturvedi, J.G. Vogel, S. Nihtianova Files PDF 1_s2.0_S1877705816336256_main.pdf 395.79 KB Close viewer /islandora/object/uuid:20eb746b-2982-41c9-868f-28ea27c83663/datastream/OBJ/view