高精度新方法测量计算船舶磁场分布  

NEW HIGH PRECISION METHOD TO MEASURE AND COMPUTE MAGNETIC FIELD OF SHIP

作　　者：陈芸[1] 赵培聪[1] 顾新宏 曹全林 罗法贵 王硕儒[3] 

机构地区：[1]青岛海洋大学物理系 [2]海军38618部队 [3]青岛海洋大学地质系

出　　处：《海洋与湖沼》1995年第5期480-487,共8页Oceanologia Et Limnologia Sinica

基　　金：海军资助

摘　　要：将高精度质子磁探仪和位场变换理论用于测量计算船舶磁场，以研究其在海洋中的分布。由质子磁探仪实测海面下10m处磁场的模（船的磁场与地磁场矢量的和的绝对值），用住场变换理论计算出船的磁场三个分量在水面和水下的分布；并采取一系列有效措施，提高计算速度和结果的精度。将该方法和磁球理论严格解比较，在z=0面上误差小于0．1％，在z=-20m面上误差小于1％；还给出船的磁场强度在船的纵横向的分布曲线和平面立体分布图。The single component magnetometer now used in measuring a ship's magneticfield has poor precision and reliability. High precision proton magnetometers canonly be used to measure the modul of magnetic intensity. In this paper the theoryof magnetic potential field transformation is. introduced to calculate the magneticfield of ships. |T| the absolute value of the vector sum, a ship's magnetic intensityH and terrestrial magnetic field intensity T0, is measured by using a proton mag-netometer under sea surface lom. is taken to be approximatelythe projection of H in the direction of T0. The distribution of the three componentsof the magnetic intensity of a ship under the sea surface lom was inferred and thenits distribution under the sea surface was deduced by means of the Green Ftinctionmethod. A 5 000 ton sliip was used to carry out practical measurement with awooden boat.Some effective techniques were used in data processing to shortencomputing time and improve accuracy. This method is.compatible with magneticsphere theory.The error is less than 0.1 % on z= 0 and less than 1% on z =-20m.The distribution curve of the magnetic field intensity and it's three components inthe longitudinal and transverse directions of the ship and the isodynamic line andthree-dimension chart of the magnetic intensity of the ship are given.

关 键 词：船舶 磁场分布 质子磁探仪 位场变换理论 

分 类 号：U674.01[交通运输工程—船舶及航道工程]