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

被引：13

作者：

Dupre, Nicolas ^{[1
]}

Bidaux, Yves ^{[1
]}

Dubrulle, Olivier ^{[2
]}

Close, Gael F. ^{[1
]}

机构：

[1] Melexis, CH-2022 Bevaix, Switzerland

[2] Melexis, B-8900 Ypres, Belgium

来源：

IEEE SENSORS JOURNAL | 2020年 / 20卷 / 19期

关键词：

Magnetic sensors; Magnetic field measurement; Magnetic domains; Mechanical sensors; Magnetostriction; Magnetic fields; Automotive electronics; Hall effect; magnetic sensors;

D O I：

10.1109/JSEN.2020.2998289

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a new Hall sensor design for the accurate and robust measurement of linear displacement. Implemented inCMOS, the sensoris basedon 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 degrees 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.

引用

页码：11405 / 11411

页数：7

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