A Stray-Field-Immune Magnetic Displacement Sensor With 1% Accuracy

Autor:	Olivier Dubrulle, Nicolas Dupré, Yves Bidaux, G.F. Close
Rok vydání:	2020
Předmět:	Physics business.industry 010401 analytical chemistry Demagnetizing field Electrical engineering 01 natural sciences 0104 chemical sciences Magnetic field Transducer CMOS Operating temperature Magnet Hall effect sensor Electrical and Electronic Engineering business Instrumentation Voltage
Zdroj:	IEEE Sensors Journal. 20:11405-11411
ISSN:	2379-9153 1530-437X
DOI:	10.1109/jsen.2020.2998289
Popis:	We present a new Hall sensor design for the accurate and robust measurement of linear displacement. Implemented in CMOS, the sensor is based on a novel gradient measurement concept combining Hall elements with integrated magnetic concentrators. In typical applications with practical Ferrite magnets, the peak output voltage of the Hall transducers is only around 1.7 mV at the maximum operating temperature of 160°C, and thus requires high-performance low-offset readout electronics. Over its 15-mm linear displacement range, the sensor’s total error is 1% including manufacturing tolerances, trimming accuracy, temperature, aging effects, and practical magnet constraints. In addition, the sensor is immune to magnetic stray fields up to 5 mT, complying with the most stringent automotive norm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::986390a15fe96262947b2aac49432d96 https://doi.org/10.1109/jsen.2020.2998289 Zobrazit plný text záznamu