کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
749222 894815 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A closed core microfluxgate sensor with cascaded planar FeNi rings
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
A closed core microfluxgate sensor with cascaded planar FeNi rings
چکیده انگلیسی

In this paper, we present a new microfabricated fluxgate sensor structure using cascaded planar rings as the ferromagnetic core. The planar ring structures provide closed magnetic excitation loops enabling uniform core saturation with relatively small excitation magnetic field. The magnetic excitation is provided with a rod passing through the ring cores. Planar coils placed under the edges of the core are used as sensing elements. By using this structure, fluxgate sensors having a closed core configuration are realized with a developed microfabrication process in a very small area (<0.1 mm2) with reduced number of via connections. The ferromagnetic rings are realized with a standard FeNi (iron–nickel) electroplating process. The main advantage of this structure is the possibility to arrange the linear operation range of the sensor by only changing the number of ring cores, without affecting the excitation mechanism. This is demonstrated by simulations and microfabricated prototypes having 18 and 12 ring cores with ±300 μT and ±550 μT linear operation ranges, respectively. A maximum linear operation range of ±2 mT is achieved with a larger size, 4-ring core. This is the widest linear operation range achieved with the microfabricated fluxgate type sensors, without using a feedback loop, to the best of our knowledge.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 162, Issue 2, August 2010, Pages 241–247
نویسندگان
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