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26054 Online digital offset voltage compensation method for AMR sensors
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Zambrano Constantini, A.C. and Kerkhoff, H.G. (2015) Online digital offset voltage compensation method for AMR sensors. In: IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2015, 11-14 May 2015, Pisa, Italy. pp. 1512-1515. IEEE Instrumentation & Measurement Society. ISBN 978-1-4799-6113-9

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The offset voltage is an undesirable voltage included at the output of an anisotropic magnetoresistance angle sensor, which affects the accuracy of the angle measurement. This voltage changes with sensor aging and hence should be compensated not just at the moment of manufacturing but also during the sensor lifetime. This can be accomplished by an online offset voltage compensation method. However, the vast majority of the methods proposed so far cannot be used online. This research proposes an online digital compensation method based on an equations system. It was verified using as input, voltages calculated with a mathematical model of the sensor and also with voltages measured in commercial angle sensors. For all cases, the offset voltages and the angle errors were lower after compensation. These results show the feasibility of the proposed method to improve the accuracy of the sensor.

Item Type:Conference or Workshop Paper (Full Paper, Talk)
Research Group:EWI-CAES: Computer Architecture for Embedded Systems
Research Program:CTIT-General
Research Project:ELESIS: European Library Based Flow Of Embedded Silicon Test Instruments
Uncontrolled Keywords:offset voltage; compensation; online; AMR sensor
ID Code:26054
Deposited On:28 August 2015
More Information:statisticsmetis

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