A Three-Axial Search Coil Magnetometer Optimized for Small Size, Low Power, and Low Frequencies

Autor:	Eugene Paperno, Asaf Grosz, Shai Amrusi, Boris Zadov
Rok vydání:	2011
Předmět:	Materials science business.industry Continuous operation Magnetometer Electrical engineering Low frequency Aspect ratio (image) Magnetic flux law.invention Search coil Optics law Electromagnetic shielding Electrical and Electronic Engineering business Instrumentation Sensitivity (electronics)
Zdroj:	IEEE Sensors Journal. 11:1088-1094
ISSN:	1558-1748 1530-437X
Popis:	A compact and sensitive three-axial search coil magnetometer has been designed, built, and tested. The magnetometer sensitivity threshold equals 12 pT/Hz0.5 at 1 Hz, and the magnetometer dimensions are 72 mm × 69 mm × 69 mm. All the magnetometer coils, the electronics, and batteries are accommodated within a single electrostatic shield and a single housing. A close to 2 aspect ratio (30 mm diameter, 58 mm total length) of the search coils provides a very high (~70%) volume utilization factor. Such a small aspect ratio is obtained due to employing 30-mm diameter, 4-mm thick flux concentrators. The magnetometer is optimized for 20 mHz to 7 Hz frequencies and for ultra-low (252 μW) power consumption. The ultra-low-power consumption enables a seven-year continuous operation from the four 1/2AA lithium batteries. The effect of the integration of three orthogonal search coils on the magnetometer sensitivity and accuracy has been investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5fbd4a6d9a3fc4b64f39f17629bccd10 https://doi.org/10.1109/jsen.2010.2079929 Zobrazit plný text záznamu