Effect of inductive coil shape on sensing performance of linear displacement sensor using thin inductive coil and pattern guide.

Sensors
Norhisam MisronHiroyuki Wakiwaka

Abstract

This paper discusses the effect of inductive coil shape on the sensing performance of a linear displacement sensor. The linear displacement sensor consists of a thin type inductive coil with a thin pattern guide, thus being suitable for tiny space applications. The position can be detected by measuring the inductance of the inductive coil. At each position due to the change in inductive coil area facing the pattern guide the value of inductance is different. Therefore, the objective of this research is to study various inductive coil pattern shapes and to propose the pattern that can achieve good sensing performance. Various shapes of meander, triangular type meander, square and circle shape with different turn number of inductive coils are examined in this study. The inductance is measured with the sensor sensitivity and linearity as a performance evaluation parameter of the sensor. In conclusion, each inductive coil shape has its own advantages and disadvantages. For instance, the circle shape inductive coil produces high sensitivity with a low linearity response. Meanwhile, the square shape inductive coil has a medium sensitivity with higher linearity.

References

Apr 20, 2002·Journal of Applied Physics·C A Grimes, K G Ong

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Citations

Feb 8, 2014·Sensors·Alfonso GarcíaEnrique Tremps
Feb 6, 2014·Sensors·Norhisam MisronKunihisa Tashiro
Oct 18, 2019··Yu WuTeddy Seyed
Oct 16, 2018··Xing-Dong YangTeddy Seyed

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