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A microcontroller-based self-calibration technique for a smart capacitive angular-position sensor

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3 Author(s)
Xiujun Li ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands ; Meijer, G.C.M. ; de Jong, G.W.

A self-calibration technique for capacitive position sensors, based on the use of a microcontroller is presented. This technique offers a good trade-off between the memory size of the microcontroller and the algorithmic complexity. The application of this technique for self-calibration of the inaccuracy caused by the geometrical errors and pattern errors in a smart capacitive angular-position sensor is discussed. This self-calibration technique doesn't need any accurate reference. Experimental results show that the self-calibration is relatively effective in reducing the influences of the geometrical errors and pattern errors of the sensor. The reduction of the inaccuracy of the smart capacitive angular-position sensor amounts to more than a factor of two

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Instrumentation and Measurement, IEEE Transactions on  (Volume:46 ,  Issue: 4 )