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

V. Chaturvedi; J.G. Vogel; S. Nihtianov

doi:10.1016/j.proeng.2016.11.312

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

V. Chaturvedi, J.G. Vogel, S. Nihtianov

Electronic Instrumentation

Research output: Contribution to journal › Conference article › Scientific › peer-review

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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.

Original language	English
Pages (from-to)	946-949
Number of pages	4
Journal	Procedia Engineering
Volume	168
DOIs	https://doi.org/10.1016/j.proeng.2016.11.312
Publication status	Published - 1 Sept 2016
Event	Eurosensors 2016: The 30th anniversary Eurosensors Conference - Budapest, Hungary Duration: 4 Sept 2016 → 7 Sept 2016

Keywords

displacement
sensor
eddy-current
demodulator
oscillator
drift
nonlinearity
finite elelement

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10.1016/j.proeng.2016.11.312

1-s2.0-S1877705816336256-mainFinal published version, 308 KBLicence: CC BY-NC-ND

Cite this

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title = "Suppression Efficiency of the Correlated Noise and Drift of Self-oscillating Pseudo-differential Eddy Current Displacement Sensor",

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.",

keywords = "displacement, sensor, eddy-current, demodulator, oscillator, drift, nonlinearity, finite elelement",

author = "V. Chaturvedi and J.G. Vogel and S. Nihtianov",

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doi = "10.1016/j.proeng.2016.11.312",

language = "English",

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AU - Chaturvedi, V.

AU - Vogel, J.G.

AU - Nihtianov, S.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - 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.

AB - 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.

KW - displacement

KW - sensor

KW - eddy-current

KW - demodulator

KW - oscillator

KW - drift

KW - nonlinearity

KW - finite elelement

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DO - 10.1016/j.proeng.2016.11.312

M3 - Conference article

SN - 1877-7058

VL - 168

SP - 946

EP - 949

JO - Procedia Engineering

JF - Procedia Engineering

T2 - Eurosensors 2016

Y2 - 4 September 2016 through 7 September 2016

ER -

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

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Keywords

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