基于SpaceWire总线即插即用图像传输系统的设计与应用研究

发布时间：2018-12-12 20:16

【摘要】：随着空间探测技术的快速发展，星载设备处理的数据量迅速增长，对星载设备的数据传输总线提出了更高的要求。SpaceWire总线是一种更好满足现代星上设备间高速数据传输需求的传输标准，目前已应用在多个航天任务。在追求网络中数据传输高速性和可靠性的同时，，快速集成、动态配置网络中的航天设备对于缩短航天器的研发周期、降低研制成本等具有重要意义。最近各个国家航天科研人员开始讨论将即插即用技术应用引入到航天领域，特别是SpaceWire网络中。目前为止，国际上没有颁布对特定设备实现即插即用功能的SpaceWire即插即用标准协议，国内对于SpaceWire总线即插即用技术的研究和开发还不多见。本文基于对SpaceWire协议栈中标准协议的研究分析，以在SpaceWire标准协议应用层扩展即插即用功能为出发点，给出了一种基于“握手识别配置”模式的SpaceWire即插即用的非标准协议与实现方案。以SpaceWire即插即用的非标准协议为基础，本文搭建了由模拟综合管理设备、模拟相机设备、模拟数据传输设备、数据监控平台和数据显示平台组成的基于SpaceWire总线即插即用图像传输系统，通过Mjpg-streamer视频服务器技术和SpaceWire即插即用实现方案设计了系统中的管控模块、SpaceWire数据输入模块和SpaceWire数据输出模块。在数据显示的图像处理模块中，本课题对暗原色先验去雾算法进行分析和改进，利用像素差值分割图像中不满足暗原色先验的天空区域，并根据图像峰值信噪比与视觉效果调节天空区域透射率，在一定程度上消除这些区域产生的色彩失真。最终系统在客户端操作界面演示了系统中SpaceWire网络设备的图像采集、传输和即插即用功能，在数据显示平台的图像处理模块增强了对采集图像去雾处理功能。
[Abstract]:With the rapid development of space exploration technology, the amount of data processed by space-borne equipment is growing rapidly. SpaceWire bus is a better standard to meet the requirement of high-speed data transmission between modern satellite devices, which has been applied in many spaceflight missions. While pursuing the high speed and reliability of data transmission in the network, it is of great significance to integrate rapidly and dynamically configure the space equipment in the network to shorten the research and development cycle of spacecraft and reduce the development cost. Recently, spaceflight researchers in various countries have begun to discuss the application of plug and play technology in aerospace, especially in SpaceWire networks. Up to now, there is no standard protocol of SpaceWire plug and play for special devices in the world. The research and development of SpaceWire plug and play technology is rare in China. Based on the research and analysis of the standard protocols in the SpaceWire protocol stack, this paper starts with extending the plug and play function in the application layer of the SpaceWire standard protocol. This paper presents a non-standard protocol and implementation scheme of SpaceWire plug and play based on handshake recognition configuration mode. Based on the non-standard protocol of SpaceWire plug and play, this paper builds the analog integrated management equipment, the analog camera equipment, the analog data transmission equipment. Data monitoring platform and data display platform based on SpaceWire bus plug and play image transmission system, through Mjpg-streamer video server technology and SpaceWire plug and play scheme to design the control module of the system. SpaceWire data input module and SpaceWire data output module. In the image processing module of data display, this paper analyzes and improves the priori de-fogging algorithm of dark primary color, and uses pixel difference to segment the sky region of the image which does not satisfy the prior dark color priori. According to the peak signal to noise ratio and visual effect, the transmittance of sky region is adjusted to eliminate the color distortion in these regions to a certain extent. Finally, the system demonstrates the functions of image acquisition, transmission, plug and play of SpaceWire network equipment in the client interface, and enhances the function of image de-fogging in the image processing module of the data display platform.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP336;TP391.41

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