Electronic Scheme for Computing Inverse-Cosine and its Application to a GMR Based Angle Sensor
| Autor: | Chandrika Sreekantan Anoop, Boby George |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Linearization
inverse-cosine Physical quantities Linearly proportional Sine wave Current sources Control theory Sinusoidal wave Electronic engineering Galvanomagnetic effects Trigonometric functions Inverse trigonometric functions Sensitivity (control systems) Sine Electrical and Electronic Engineering Instrumentation Linear output Physical quantity Physics Angle sensors Sensors Sine functions Electronic component visual_art Worst case error visual_art.visual_art_medium Magnetic recording |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 61:1991-1999 |
| ISSN: | 1557-9662 0018-9456 |
| DOI: | 10.1109/tim.2011.2182260 |
| Popis: | This paper presents a new, simple but effective, electronic method to obtain inverse-cosine of an electrical variable. The proposed method is very useful for linearization of sensors whose output is a cosine or sine function of the physical quantity being sensed. The inverse-cosine of the variable is obtained by comparing it with a reference sinusoidal wave. The proposed method is easy to implement using electronic components. Using the new technique, a giant magneto-resistance-based angle sensor that provides an output linearly proportional to the angle being sensed has been developed, and the details are reported in this paper. A prototype of the angle sensor has been built, and the practicality of the new method has been tested successfully. The developed sensor provides a linear output for a range of 0� to 180�. The worst case error was found to be less than 0.35� for a range of 10�-170�. � 2012 IEEE. |
| Databáze: | OpenAIRE |
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