TY - JOUR
T1 - An efficient method for processing scalar magnetic gradiometer signals
AU - Ginzburg, Boris
AU - Frumkis, Lev
AU - Kaplan, Ben Zion
N1 - Funding Information:
The support of the Paul Ivanier Center for Robotics Research and Production Management is gratefully acknowledged. Boris Ginzburg was born in 1951 in St.-Petersburg, Russia. He earned his MSc in radio-physics & electronics from the Technical University of St.-Petersburg (Russia) in 1974. He obtained his PhD in physics & mathematics from Phys.-Techn. Ioffe Institute, St.-Petersburg (Russia) in 1986. In the years 1974–1996 he was a research scientist with Geophysical Research Institute in St.-Petersburg. During this period he was engaged in R & D of optical pumping magnetometers for precise measurements of the Earth’s magnetic field. His experimental investigation of optical pumping phenomena in alkalis and helium resulted in design of new Rb–He and K–He magnetometers with very high metrological features. He headed a research group concerned with elaboration of technological processes for precise magnetic sensors production. Now Dr. Ginzburg is the Head of research group in Nuclear Research Center SOREQ. His main scientific interests are in the field of precise measurements of the Earth’s magnetic field and various magnetic search & detection applications. Lev Frumkis was born in Barnaul, Russia in 1938. He obtained the M Sc Degree in Radio Physics and Electronics in 1961, the D Phil Degree in Radio Physics in 1967, and the D Sc Degree in Radio Physics in 1989, all of them from Tomsk State University, Russia. He served as a scientist in the Siberian Physics and Technology Institute, Tomsk, where he worked on various electromagnetic problems from 1961 to 1990. He immigrated to Israel in 1991. He served as an Engineer in Israel Aircraft Industry from 1991 to 1993. He is with the department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel since 1994, where he is a Research Fellow financed by a Ministry of Absorption Grant. His present research activity is mainly in the field of magnetic shielding and magnetometry. Ben - Zion Kaplan , senior member of IEEE, member of the Israeli Committee of URSI and member of its Metrology Subcommittee, was born in Tel-Aviv, Israel in 1936. He received the BSc degree cum laude in 1958 and the MSc degree in 1964, both from the Technion-Israel Institute of Technology, Haifa, Israel, and the D Phil degree in electrical engineering from the University of Sussex, Falmer, Brighton, England in 1971. From 1961 to 1968 he worked as a Research Engineer at the Electronics Department (presently the Department of Physics of Complex Systems) in the Weizmann Institute of Science, Rehovot, Israel. From 1968 to 1971 he was with the Inter University Institute of Engineering Control, University of Sussex, School of Applied Sciences. Since 1972 he has been with the Department of Electrical and Computer Engineering of the Ben-Gurion University of the Negev, Beer-Sheva, Israel, where he is professor since 1985, and where he established the laboratory for magnetic and electronic systems. He has been the incumbent of the Konrad and Chinita Abrahams, Curiel Chair in Electronic Instrumentation since 1988. In 1992 he was on sabbatical leave in the Department of Physics, University of Otago, Dunedin, New Zealand. He obtained in 1993 a prize in the field of applied electronics donated by the Polish-Jewish Ex-Servicemen’s Association, London. The prize was due to Kaplan’s achievements in nonlinear electronics and in magnetics. Professor B.Z. Kaplan published hundred and thirty articles in refereed scientific journals. His main current interests are magnetic and electronic instrumentation, electromechanical devices including magnetic levitators and synchronous machines, nonlinear phenomena in electronic networks and magnetic devices, nonlinear and chaotic oscillations, coupled oscillator systems, multiphase oscillators, magnetometry and its relationship to ELF phenomena, magnetic and electric field sensors for DC and ULF.
PY - 2004/8/20
Y1 - 2004/8/20
N2 - The work is devoted to the detection and analysis of scalar magnetic gradiometer survey signals caused by the presence of magnetostatic dipole in the vicinity of the survey line. A set of five orthonormal functions obtained with the aid of Gram-Schmidt procedure was found sufficient for an accurate signal description in a wide range of distances between the gradiometer and the dipole. Processing of the acquired signal can be carried out by correlating it with the mentioned five orthonormal functions. In the special case of short-base gradiometer the dipole signal can be expressed by four orthonormal functions. The present work main contribution is in showing that these four orthonormal functions are sufficient and effective for a survey signal processing even when the gradiometer base is not small. The effectiveness of the magnetic anomaly detection procedure is demonstrated for extracting signals in the presence of an additive noise. The practical contribution of such approach is the development of more robust and less time-consuming detection procedures that are vital for successful real-time data processing.
AB - The work is devoted to the detection and analysis of scalar magnetic gradiometer survey signals caused by the presence of magnetostatic dipole in the vicinity of the survey line. A set of five orthonormal functions obtained with the aid of Gram-Schmidt procedure was found sufficient for an accurate signal description in a wide range of distances between the gradiometer and the dipole. Processing of the acquired signal can be carried out by correlating it with the mentioned five orthonormal functions. In the special case of short-base gradiometer the dipole signal can be expressed by four orthonormal functions. The present work main contribution is in showing that these four orthonormal functions are sufficient and effective for a survey signal processing even when the gradiometer base is not small. The effectiveness of the magnetic anomaly detection procedure is demonstrated for extracting signals in the presence of an additive noise. The practical contribution of such approach is the development of more robust and less time-consuming detection procedures that are vital for successful real-time data processing.
KW - Magnetic anomaly detection
KW - Magnetic gradiometer
KW - Orthonormal functions
UR - http://www.scopus.com/inward/record.url?scp=3042730309&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2004.03.008
DO - 10.1016/j.sna.2004.03.008
M3 - Article
AN - SCOPUS:3042730309
SN - 0924-4247
VL - 114
SP - 73
EP - 79
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
IS - 1
ER -