海洋磁力测量技术设计关键技术研究

发布时间：2018-06-16 18:01

本文选题：海洋磁力测量 + 测图比例尺与图幅　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：本文针对目前我国海洋磁力测量技术设计中的相关关键技术展开探讨和研究,尝试提出测图比例尺确定与图幅划分的方法;探讨船磁影响的测定方法,给出船磁影响校正值得计算方法;并对测线布设这一技术设计关键技术展开了重点研究,提出了测线方向和测线间距的确定方法,并通过仿真和实测数据对方法的有效性和可行性进行了验证。本文的研究完善了海区技术设计的内容,可以为我国规范化获取高精度海洋磁场信息提供理论依据。本文的研究成果和创新点有:(1)系统总结了国内海洋磁力测量技术设计方面的研究进展,指出了海区技术设计方面存在的问题和解决思路;(2)测图比例尺直接关系着测量成果图的准确程度、地磁场分布的详细程度以及测量工作效率,给出了测图比例尺选择的原则,提出了解析法图幅划分,该法适用于同一比例尺对沿岸开阔海域、近海、远海测区进行分幅或在图解法划分图幅的过程中用基础比例尺标准图幅划分;(3)建立了测船磁化模型,分析了船尾磁场的变化规律,研究表明:船尾磁场随着航向角的不同而变化,并且当航向角为0°或180°时,船尾磁场强度最大,此时其对海洋磁力测量的影响也最大。进一步完善和规范了船磁八方位试验及拖缆长度和拖放深度的试验方法;(4)船磁影响校正值的计算方法中,傅立叶级数法的拟合效果要优于四航向法,建议在海洋磁力测量中使用;(5)测线方向应尽量沿测区磁异常总梯度方向或垂直于磁异常等值线方向布设,并综合考虑其它因素影响;建立了内插磁测值精度与测线间距的关系,通过磁测误差常差和磁测比例误差系数来确定测线间距,结合《要求》规定,给出我国海洋磁力测量测线间距选择方案。
[Abstract]:In this paper, we discuss and study the relevant key technologies in the design of marine magnetic measurement technology in China, try to put forward the method of determining the scale of surveying map and dividing the map, and discuss the method of measuring the influence of ship's magnetic field. The calculation method of ship magnetic impact correction is given, and the key technology of line layout is studied, and the method of determining the direction and spacing of surveying line is put forward. The validity and feasibility of the method are verified by simulation and measured data. The research in this paper has perfected the content of the technical design of the sea area and can provide the theoretical basis for the standardization of obtaining the high precision marine magnetic field information in our country. The research results and innovations of this paper include: 1) the research progress in the design of marine magnetic measurement technology in China is summarized systematically. This paper points out the problems existing in the technical design of the sea area and the solution to the problem. The scale of surveying map is directly related to the accuracy of the surveying result map, the detail degree of geomagnetic field distribution and the efficiency of surveying work. The principle of selecting the scale of surveying map is given. In this paper, an analytical method for map partition is put forward. This method is suitable for dividing the offshore, offshore and far-sea survey areas on the same scale, or using the basic scale standard map to divide the map in the process of drawing the map, and establishes the magnetization model of the survey ship. The variation law of the stern magnetic field is analyzed. The results show that the stern magnetic field varies with the heading angle, and when the heading angle is 0 掳or 180 掳, the strength of the stern magnetic field is the largest, and the influence on the measurement of ocean magnetic force is also greatest. In further perfecting and standardizing the methods for calculating the magnetic effect correction values of the ship's magnetic effects, the Fourier series method is better than the four-course method in the calculation of the magnetic influence correction values of the ship. The test methods of the eight-azimuth test and the length and depth of the towing cable are further improved and standardized. It is suggested that the direction of the line should be arranged as far as possible along the direction of the total gradient of magnetic anomaly or perpendicular to the isoline of the magnetic anomaly, and other factors should be considered synthetically, and the relationship between the precision of the interpolated magnetic value and the distance between the measured lines is established. The distance between the measured lines is determined by the constant deviation of the magnetic measurement error and the coefficient of the proportional error of the magnetic measurement. Combined with the stipulation of "requirements", the selection scheme of the distance between the measured lines of the marine magnetic force measurement in China is given.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.224

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