Magnetic Sensors Based on Amorphous Ferromagnetic Materials: A Review

Sensors

Carlos Morón¹  Carolina Cabrera²  Alberto Morón²  Alfonso García²  Mercedes González² 

[1] Sensors and Actuators Group, Department of Building Technology, Polytechnic University of Madrid, 28040 Madrid, Spain;

关键词: magnetic sensor;    amorphous ribbons;    amorphous wire;    ferromagnetic material;    magnetic core;    magnetometer;    magnetoimpedance;    bistability;    security system;    weapon detectors;   

DOI  :  10.3390/s151128340

来源: mdpi

【 摘 要 】

Currently there are many types of sensors that are used in lots of applications. Among these, magnetic sensors are a good alternative for the detection and measurement of different phenomena because they are a “simple” and readily available technology. For the construction of such devices there are many magnetic materials available, although amorphous ferromagnetic materials are the most suitable. The existence in the market of these materials allows the production of different kinds of sensors, without requiring expensive manufacture investments for the magnetic cores. Furthermore, these are not fragile materials that require special care, favouring the construction of solid and reliable devices. Another important feature is that these sensors can be developed without electric contact between the measuring device and the sensor, making them especially fit for use in harsh environments. In this review we will look at the main types of developed magnetic sensors. This work presents the state of the art of magnetic sensors based on amorphous ferromagnetic materials used in modern technology: security devices, weapon detection, magnetic maps, car industry, credit cards, etc.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.