<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This paper presents a novel phase-shift arctangent (PSA) interpolation method to improve the measurement accuracy of a planar capacitive incremental displacement sensor. Signals of planar capacitive micro-sensors acquire waveform errors, including sensitivity differences and phase-shift errors, because of static errors and dynamic disturbances. In the proposed PSA scheme, such errors are removed completely by loading a particular arctangent function. Moreover, measuring efficiency of the proposed planar capacitive sensors is improved by combining coarse measurement and fine estimation. Experiments show unanimous results to model-based fitting. When electrode length is four times the gap distance, applying the PSA interpolation method decreases waveform errors from more than 4 % to 1.72 %.</p></abstract>

This paper presents a novel phase-shift arctangent (PSA) interpolation method to improve the measurement accuracy of a planar capacitive incremental displacement sensor. Signals of planar capacitive micro-sensors acquire waveform errors, including sensitivity differences and phase-shift errors, because of static errors and dynamic disturbances. In the proposed PSA scheme, such errors are removed completely by loading a particular arctangent function. Moreover, measuring efficiency of the proposed planar capacitive sensors is improved by combining coarse measurement and fine estimation. Experiments show unanimous results to model-based fitting. When electrode length is four times the gap distance, applying the PSA interpolation method decreases waveform errors from more than 4 % to 1.72 %.

A Novel Quadrature Signal Estimation Method for a Planar Capacitive Incremental Displacement Sensor

College of Mechanical Engineering, Quzhou University, Jiuhua Rd., No. 78, 324000, Quzhou, China

School of Mechanical Engineering, Hangzhou Dianzi University, Baiyang 2nd Rd., No. 1158, 310018, Hangzhou, China

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

This paper presents a novel phase-shift arctangent (PSA) interpolation method to improve the measurement accuracy of a planar capacitive incremental...

A Novel Quadrature Signal Estimation Method for a Planar Capacitive Incremental Displacement Sensor

Publié en ligne: 11 juin 2016

Pages: 127 - 133

Reçu: 03 nov. 2015

Accepté: 27 mai 2016

DOI: https://doi.org/10.1515/msr-2016-0015

Mots clés
Phase-shift arctangent method, capacitive displacement sensor, static and dynamic errors, accuracy improvement

© 2016 Jian-Ping Yu et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

A Novel Quadrature Signal Estimation Method for a Planar Capacitive Incremental Displacement Sensor

Publié en ligne: 11 juin 2016

Pages: 127 - 133

Reçu: 03 nov. 2015

Accepté: 27 mai 2016

DOI: https://doi.org/10.1515/msr-2016-0015

Mots clésPhase-shift arctangent method, capacitive displacement sensor, static and dynamic errors, accuracy improvement

© 2016 Jian-Ping Yu et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Phase-shift arctangent method, capacitive displacement sensor, static and dynamic errors, accuracy improvement