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http://dx.doi.org/10.5762/KAIS.2020.21.4.26

Modeling and Calibration of Wrist Magnetic Sensor for Measuring Wrist Gesture  

Yeo, Hee-Joo (Department of Electronic Eng., Daejin University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.4, 2020 , pp. 26-32 More about this Journal
Abstract
Recently, as various wearable devices and IoT technologies have emerged and been applied to real applications, various sensors have been developed to satisfy their purposes and applied. In even In medical applications, IoT technologies have been applied gradually, and particularly, magnets and magnetic sensors have already been playing an important role in the medical industry. In wrist rehabilitation, this kind of sensor technology has enabled us to easily and conveniently measure wrist movement and gestures because there are no tangled lines required between the magnet and sensor. However, one of the drawbacks is that nonlinear output is generated because of the characteristics of a magnetic field. Also, the movement of the wrist joint involves small bones, and so it is not easy to simply model the movement. In order to resolve these issues and accurately measure sensor data, a calibration procedure is inevitable in the measurement. Thus, this paper proposes a practical model and simple calibration methods for measuring the distance between a magnet and a magnetic sensor.
Keywords
Wearable; Magnet; Wrist; Sensor; Calibration;
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