矩形回线激发的电磁场与磁场的对称关系研究-中南大学学报.PDF

41 2 () Vol.41 No.2 2010 4 Journal of Central South University (Science and Technology) Apr. 2010 1 2 1 1 1 1 (1. 410083 2. 221116) x y x x y y y x 1/4 1 P631 A 1672−7207(2010)02−0638−05 Relationship between electromagnetic field and magnetic field’s symmetric excited by rectangular loop 1 2 1 1 1 1 LI Jian-hui , LIU Shu-cai , ZHU Zi-qiang , LU Guang-yin , ZHAO Xiao-bo , ZHAO Shuang-qiu (1. School of Info-physics and Geomatics Engineering, Central South University, Changsha 410083, China; 2. School of Resource Geoscience, China University of Mining Technology, Xuzhou 221116, China) Abstract: From the electric field excited by vertical magnetic dipole, the total electric field excited by a rectangular loop was deduced using loop area integral for magnetic moment. Based on Faraday law of electromagnetic induction, impulse responses of magnetic induction were deduced from electric field strength step responses. Based on the fact that horizontal component of magnetic field which is emitted by vertical magnetic dipole has radial component only in cylindrical coordinate system, some symmetrical relationships of magnetic induction were concluded. Conversion relationship between component x and component y was obtained from sine and cosine function relatio