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http://dx.doi.org/10.3795/KSME-A.2015.39.10.995

Ring-Shaped Inductive Sensor Design and Application to Pressure Sensing  

Noh, Myounggyu (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.)
Kim, Sunyoung (Samsung Electro-Mechanics)
Baek, Seongki (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.)
Park, Young-Woo (Dept. of Mechatronics Engineering, Chungnam Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.39, no.10, 2015 , pp. 995-999 More about this Journal
Abstract
Inductive sensors are versatile and economical devices that are widely used to measure a wide variety of physical variables, such as displacement, force, and pressure. In this paper, we propose a simple inductive sensor consisting of a thin partial ring and a coil set. The self-inductance of the sensor was estimated using magnetic circuit analysis and validated through finite element analysis (FEA). The natural frequency of the ring was estimated using Castigliano's theorem and the method of equivalent mass. The estimation was validated through experiments and FEA. A prototype sensor with a signal processing circuit is built and applied to noninvasively sense the pressure inside a flexible tube. The obtained sensor outputs show quadratic behavior with respect to the pressure. When fitted to a quadratic equation, the least-square measurement error was less than 2%. The results confirm the feasibility of pressure sensing using the proposed inductive sensor.
Keywords
Inductive Sensing; Non-Invasive Sensing; Pressure Sensing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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