X射线脉冲星信号探测的地面验证技术研究
发布时间：2018-08-02 08:28
【摘要】：基于X射线脉冲星导航是一种新型的导航方式,其通过X射线脉冲到达时间的探测以获得空间位置坐标,但X射线无法穿透大气层,故需要进行地面验证探测实验。针对上述需求,本文搭建了X射线脉冲星信号探测的地面验证系统,并对系统中的关键技术进行了深入分析,该系统能够模拟X射线脉冲星的流量信号,实现微弱光子信号的探测,并根据导航需求,进行X射线脉冲星波形轮廓的还原。 X射线脉冲星信号探测的地面验证技术研究是开展深空导航的基础,对于实际应用有着重大的参考价值,本课题将从验证平台的各个组成部分入手,对验证技术进行分析,研究内容主要涉及以下几个方面： 1)脉冲星数据库的建立。脉冲星数据库是导航的基础也是进行信号模拟的关键,本文通过国外各脉冲星数据库的查询以及数据处理获取基本脉冲星参数,同时走访国内天文台,了解相关脉冲星资讯以完善数据库内容,目前数据库中已有部分脉冲星参数,并且在不断丰富中。 2)X射线脉冲星信号模拟。本文针对X射线脉冲星信号特点,采用栅控X射线管进行信号模拟,并对信号源关键参数及栅控电路进行了设计,可实现数据库与控制电路的数据通讯和波形控制。 3)X射线传感器分析及对应探测电路设计。本文分析了提高X射线探测器探测精度的关键指标,优选了Si-PIN探测器作为验证传感器,并针对信号特性设计了信号检测处理电路,并实现与上位机的通讯。 4)整体平台结构设计。结合X射线对人体的辐射危害以及X射线在空气中的衰减情况设计了屏蔽结构和真空结构,能够实现平台各个部分的良好组合,并通过实际仿真和实验证明对应结构能够起到良好的屏蔽效果,真空腔体也能够承受对应大气压力。 最后针对性地设计实验,对X射线光子时间信号进行了历元折叠,得到脉冲星累积轮廓。
[Abstract]:X-ray pulsar navigation is a new type of navigation method, which can obtain the coordinates of space position by detecting the arrival time of X-ray pulses, but X-ray can not penetrate the atmosphere, so it is necessary to conduct ground verification exploration experiments. To meet the above requirements, a ground verification system for X-ray pulsar signal detection is built, and the key technologies of the system are analyzed in depth. The system can simulate the flow signals of X-ray pulsars. To realize the detection of weak photon signals and to restore the waveform profile of X-ray pulsars according to the navigation requirements, the ground verification technology of X-ray pulsars signal detection is the foundation of deep space navigation. It is of great reference value for practical application. This subject will start with each component of the verification platform and analyze the verification technology. The main contents of the research are as follows: 1) the establishment of pulsar database. Pulsar database is the basis of navigation and the key to signal simulation. This paper obtains the basic pulsar parameters through the query and data processing of the pulsar database in foreign countries, and visits the domestic observatories at the same time. To understand the relevant pulsar information to improve the database content, there are some pulsar parameters in the database at present, and in a growing number of. 2) X-ray pulsar signal simulation. In this paper, according to the characteristics of X-ray pulsar signal, the signal is simulated by gate controlled X-ray tube, and the key parameters of signal source and gate control circuit are designed. Data communication and waveform control between database and control circuit can be realized. 3) X-ray sensor analysis and corresponding detection circuit design. In this paper, the key index to improve the detection accuracy of X-ray detector is analyzed, the Si-PIN detector is selected as the verification sensor, and the signal detection and processing circuit is designed according to the signal characteristics. And realize the communication with the host computer. 4) the overall platform structure design. The shielding structure and vacuum structure are designed in combination with the radiation damage to human body caused by X-ray and the attenuation of X-ray in the air, which can realize the good combination of each part of the platform. The simulation and experiments show that the corresponding structure has good shielding effect and the vacuum cavity can bear the corresponding atmospheric pressure. Finally, experiments are designed to fold the X-ray photon time signals and obtain the cumulative profile of pulsars.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P128.4
[Abstract]:X-ray pulsar navigation is a new type of navigation method, which can obtain the coordinates of space position by detecting the arrival time of X-ray pulses, but X-ray can not penetrate the atmosphere, so it is necessary to conduct ground verification exploration experiments. To meet the above requirements, a ground verification system for X-ray pulsar signal detection is built, and the key technologies of the system are analyzed in depth. The system can simulate the flow signals of X-ray pulsars. To realize the detection of weak photon signals and to restore the waveform profile of X-ray pulsars according to the navigation requirements, the ground verification technology of X-ray pulsars signal detection is the foundation of deep space navigation. It is of great reference value for practical application. This subject will start with each component of the verification platform and analyze the verification technology. The main contents of the research are as follows: 1) the establishment of pulsar database. Pulsar database is the basis of navigation and the key to signal simulation. This paper obtains the basic pulsar parameters through the query and data processing of the pulsar database in foreign countries, and visits the domestic observatories at the same time. To understand the relevant pulsar information to improve the database content, there are some pulsar parameters in the database at present, and in a growing number of. 2) X-ray pulsar signal simulation. In this paper, according to the characteristics of X-ray pulsar signal, the signal is simulated by gate controlled X-ray tube, and the key parameters of signal source and gate control circuit are designed. Data communication and waveform control between database and control circuit can be realized. 3) X-ray sensor analysis and corresponding detection circuit design. In this paper, the key index to improve the detection accuracy of X-ray detector is analyzed, the Si-PIN detector is selected as the verification sensor, and the signal detection and processing circuit is designed according to the signal characteristics. And realize the communication with the host computer. 4) the overall platform structure design. The shielding structure and vacuum structure are designed in combination with the radiation damage to human body caused by X-ray and the attenuation of X-ray in the air, which can realize the good combination of each part of the platform. The simulation and experiments show that the corresponding structure has good shielding effect and the vacuum cavity can bear the corresponding atmospheric pressure. Finally, experiments are designed to fold the X-ray photon time signals and obtain the cumulative profile of pulsars.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P128.4
【参考文献】
相关期刊论文 前10条
1 乔黎;刘建业;郑广楼;贺亮;熊智;;基于X射线脉冲星导航系统探测器研究[J];传感器与微系统;2008年01期
2 张华;许录平;;基于光量子探测的XPNAV半物理仿真及建模[J];光电子.激光;2011年06期
3 刘利;郑伟;汤国建;孙守明;;基于X射线脉冲星的导航半实物仿真系统[J];国防科技大学学报;2012年05期
4 史世平;;X射线脉冲星导航系统在月球摄影测量中的应用[J];测绘通报;2011年09期
5 张承模,马宇倩,王焕玉,徐玉朋,梁晓华,沈培若,邵晓红,高e，
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