高温超导全张量磁梯度仪数据通信与坐标变换技术

发布时间：2018-06-17 06:43

本文选题：磁梯度张量 + 通信协议　；参考：《吉林大学》2015年硕士论文

【摘要】：通过提取并解释叠加在地磁场上的由磁性体造成的异常磁场，磁力勘探被广泛应用于地质普查、金属矿勘探以及军事应用等领域。由于地磁场的梯度很小，，因此相比于传统的磁力勘探方法，磁梯度张量探测具有强化异常磁场，弱化背景磁场的优点。但是在磁梯度张量探测过程中探头的姿态变化会导致所测的磁场梯度产生较大的波动，引入虚假异常，使解释结果不准确。针对这一问题，本文设计了软硬结合的数据同步保存方法，推导了载体坐标系与地理坐标系的变换公式，来实现探头的姿态校正，并通过实验验证了方案的有效性。本文的具体研究内容有： (1)简要说明了磁法勘探的原理，着重介绍了磁梯度张量测量原理，然后叙述了课题研究目的与意义，接下来对磁梯度张量测量的国内外发展现状及趋势进行了说明。对整个硬件系统的设计思路进行了分析，以硬件原理框图的形式给出了整个系统各个部件的构成及其相互连接关系。 (2)分析了高温超导磁力仪SQUID串口通信和IAPS20惯性导航系统网口通信的工作原理，针对高温超导磁力仪串口通信开发了串口通信软件，并以软件运行流程图的形式进行了描述，以TCP/IP协议为基础，阐述了GNSS/惯性导航组合系统与PC104工控机之间的网口通信方式，设计了基于Sockets套接字的网口通信软件，并对网口通信软件的关键性代码进行了注释说明，对网口通信软件的运行思路以流程图的形式给出。 (3)针对在磁梯度张量测量中，梯度传感器的姿态发生变化会导致所测的磁场梯度产生较大的波动，影响对异常数据的解释与反演的问题，设计了利用惯导系统测得的姿态信息对超导传感器测量的张量数据进行校正并对惯导数据与张量数据的同步采集与保存设计了解决方案。 (4)磁梯度仪采集的磁梯度张量数据是基于本身的载体坐标系，该数据随着坐标体系的变换而随机变化，惯性导航设备记录的姿态信息是基于地理坐标系，为固定坐标系。通过分析两个坐标系之间的对应关系，推导姿态变换方程，将基于不断变化的载体坐标系中的数据变换到基于地理坐标系（基准坐标系）下的磁梯度张量数据，为磁梯度张量测量姿态校正做好理论准备。 (5)针对系统设计了测试试验，通过Matlab软件将实验数据进行处理，给出了波形图，并对结果进行了分析，验证了数据处理方法的准确性。 (6)对本论文进行了最后总结，分析了本系统仍然存在的不足，并提出需要继续进行的研究和试验，以便系统性能能够进一步的提高。本论文是863计划主题项目《航空地球物理勘查技术与装备》子课题《航空超导全张量磁梯度测量系统样机研制》的部分研究内容。
[Abstract]:By extracting and interpreting the anomalous magnetic field caused by magnetic body superimposed on the geomagnetic field, magnetic exploration is widely used in geological survey, metal ore exploration and military application. Because the gradient of geomagnetic field is very small, compared with the traditional method of magnetic exploration, magnetic gradient Zhang Liang detection has the advantages of strengthening anomalous magnetic field and weakening background magnetic field. However, in the process of magnetic gradient Zhang Liang detection, the change of probe attitude will lead to a large fluctuation of the measured magnetic field gradient, which leads to the introduction of false anomalies, which makes the interpretation results inaccurate. In order to solve this problem, this paper designs a method of data synchronization, deduces the transformation formula between carrier coordinate system and geographical coordinate system to realize the attitude correction of the probe, and verifies the validity of the scheme through experiments. The main contents of this paper are as follows: 1) the principle of magnetic exploration is briefly explained, the principle of magnetic gradient Zhang Liang measurement is emphatically introduced, and the purpose and significance of the research are described. Then the current situation and trend of magnetic gradient Zhang Liang measurement at home and abroad are explained. The design idea of the whole hardware system is analyzed. In the form of hardware principle block diagram, the composition of each component of the whole system and its connection relationship are given. The working principle of squid serial port communication and IAPS20 inertial navigation system network interface communication are analyzed. The serial communication software is developed for the serial communication of HTS magnetometer, and described in the form of software flow chart. Based on TCP / IP protocol, the communication mode between GNSS / inertial navigation integrated system and PC104 industrial control computer is described. The socket based communication software is designed, and the key code of the socket communication software is annotated. The train of thought of the communication software of the network port is given in the form of flow chart. (3) in the magnetic gradient Zhang Liang measurement, the change of the gradient sensor's attitude will lead to the great fluctuation of the measured magnetic field gradient. Problems affecting interpretation and inversion of anomalous data, In this paper, the attitude information measured by inertial navigation system (ins) is used to correct the Zhang Liang data measured by superconducting sensors, and a solution for synchronous acquisition and preservation of inertial navigation data and Zhang Liang data is designed. The magnetic gradient Zhang Liang data of the set are based on its own carrier coordinate system. The data changes randomly with the transformation of coordinate system. The attitude information recorded by inertial navigation equipment is based on geographical coordinate system and is a fixed coordinate system. By analyzing the corresponding relationship between the two coordinate systems, the attitude transformation equation is derived, and the magnetic gradient Zhang Liang data based on the changing carrier coordinate system is transformed to the magnetic gradient Zhang Liang data based on the geographical coordinate system (datum coordinate system). The test experiment is designed for the system, the experimental data are processed by Matlab software, the waveform diagram is given, and the results are analyzed. The accuracy of the data processing method is verified. Finally, this paper is summarized, the shortcomings of the system are analyzed, and the further research and experiments are put forward so that the system performance can be further improved. This paper is part of the research content of 863 project "Aeronautical Geophysical Prospecting Technology and equipment" sub-project "Research on the prototype of Aeronautical Superconducting Zhang Liang Magnetic gradient Measurement system".
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.1

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