Multiple turn transmitting loop exciting field calculationand exciting effect analysis of NMR for underground water detecting

摘要：

NMR(Nuclear Magnetic Resonance) is an effective and direct way to detect the underground water. As the ordinary loop(100m*100m or 150m*150m) is so large that it leads to many limitation to survey area and causes a reduction of the NMR resolution. Multiple turn loop can improve the resolution of the NMR method and needs little area to locate the loop. The nearly fixed parameters of the multiple turn loop also improves the accuracy of the NMR detecting. With the multiple turn loop, we can realize certain depth water exciting under the ground that cant be excited by single turn loop with smaller loop size.The multiple turn loop exciting field calculation and exciting effect analysis is shown in the paper. The exciting field calculation of the multiple turn loop is first introduced and several different multiple turn loop with the same radius and different turns are listed. The magnetic induction value and tipping angle distribution of the section plane along with the loops diameter of these kind of multiple turn loops are given out. The relationship between turns and exciting depth with fixed diameter is also discussed.Finally, Some suggestions on the multiple turn loop exploration are brought forward for further study.

关键词： multiple turn loop magnetic induction excitation pulse moment tipping angle

作者: RONG Liangliang JIANG Chuandong LIN Jun

作者单位: College of Instrumentation and Electrical Engineering, Jilin University, China

会议类型: 国际会议

会议名称: The 19th International Workshop on Electromagnetic Induction in the Earth(第十九届国际地球电磁感应学术研讨会)

会议地点: 北京

会议语种:英文

页码: 51-56

在线出版日期: 2008-10-23（万方平台首次上网日期，不代表论文的发表时间）