高速高可靠小型數(shù)字視頻存儲系統(tǒng)的設計與實現(xiàn)
發(fā)布時間：2019-03-31 18:28
【摘要】：在武器試驗中，光電測量設備不僅要獲得目標的外彈道軌跡、飛行軌跡等測試參數(shù)，同時還要獲得目標的高精度飛行姿態(tài)參數(shù)、光學特性參數(shù)以及其它的常規(guī)測量參數(shù)。這些參數(shù)的取得依賴于所選擇的大面陣、高幀頻相機從不同角度獲取目標的高速成像信息以及設備跟蹤的測量信息，這對高速圖像數(shù)據(jù)和同步測量信息的實時記錄提出了更高的要求，為此研究性能可靠、體積小、容量大，面向高速數(shù)據(jù)的存儲系統(tǒng)成為靶場測量急需解決的問題，本文主要研究對象為面向大型光電經緯儀的存儲系統(tǒng)，同樣適用于航測圖像、氣象雷達、遙感、爆炸實驗、流體實驗、碰撞檢測的存儲應用中。 本文主要針對高速數(shù)據(jù)和低速存儲設備矛盾、圖像和異源信息同幀控制、嵌入式Linux操作系統(tǒng)移植、系統(tǒng)小型化、圖像數(shù)據(jù)的編碼糾錯，存儲介質的損耗均衡等問題進行研究，實現(xiàn)了系統(tǒng)高速數(shù)據(jù)的高可靠存儲和設備的小型化。 本文采用DM8168和FPGA相結合的嵌入式系統(tǒng)硬件平臺直接存儲方案，避免了非實時操作系統(tǒng)與計算機結構的瓶頸限制，僅由兩個芯片完成了數(shù)據(jù)流的糾錯編碼、采集、存儲和網絡傳輸控制，減少芯片級聯(lián)，降低硬件平均故障率，實現(xiàn)了系統(tǒng)的小型化。采用異源信息與圖像數(shù)據(jù)同幀追加策略，保證了追加異源信息與圖像數(shù)據(jù)的嚴格同幀存儲。 結合圖像的二維特點，本文設計了含有追加信息的實時圖像二維RS編碼糾錯算法，在兩個維度上進行RS編碼糾錯，該算法提高了糾正數(shù)據(jù)突發(fā)錯誤和隨機錯誤的能力。同時還提出了采集容錯和圖像二維特性容錯方法，保證了存儲不丟幀，不誤幀，實現(xiàn)了數(shù)據(jù)糾錯、幀糾錯和行糾錯，提高了數(shù)據(jù)存儲的可靠性。 本文對嵌入式Linux系統(tǒng)進行移植，增加必要驅動，裁剪掉系統(tǒng)無關模塊，保證了系統(tǒng)的穩(wěn)定運行管理，系統(tǒng)對固態(tài)硬盤采用基于地址順序寫入的均衡管理，順次遍歷固態(tài)硬盤所有的映射地址寫入圖像數(shù)據(jù)，延長了固態(tài)硬盤的使用壽命；對機械磁盤提出了采用直接控制物理地址的循道存儲的方案，減少尋道時間，提高存儲速度。 以DM8168為核心的嵌入式系統(tǒng)，進行任務管理時，突破了硬盤文件系統(tǒng)的限制，將硬盤文件分配表等參數(shù)信息獨立記錄在存儲介質外部FRAM中，該設計減少了Linux內核對硬盤文件系統(tǒng)的操作開銷，一方面便于機械磁盤數(shù)據(jù)恢復，另一方面解決了固態(tài)硬盤文件表需要損耗均衡的問題，提高系統(tǒng)可靠性。 本文研究的存儲系統(tǒng)單元可實時穩(wěn)定存儲400MBps相機數(shù)據(jù)輸入，大大提高了存儲效率，，實現(xiàn)了設備的小型化設計，分塊二維RS編碼糾錯的應用使編碼糾錯能力提高1.97倍，誤比特率為1.01E-11，嵌入式存儲系統(tǒng)實現(xiàn)了任務管理、數(shù)據(jù)遠程網絡下載和系統(tǒng)的在線維護，根據(jù)工程實際應用需要，采用針對高幀頻相機的數(shù)據(jù)源流分配技術，對存儲系統(tǒng)單元并行級聯(lián)后，可以滿足多領域的存儲應用需要。
[Abstract]:In the weapon test, the photoelectric measuring equipment should not only obtain the testing parameters of the target's outer trajectory and flight trajectory, but also obtain the high-precision flight attitude parameters, optical characteristic parameters and other conventional measurement parameters of the target. The acquisition of these parameters depends on the large array selected, the high-speed imaging information of the target from different angles obtained by the high-frame-rate camera, and the measurement information tracked by the device. This puts forward higher requirements for real-time recording of high-speed image data and synchronous measurement information. Therefore, the research on high-speed data-oriented storage system with reliable performance, small size and large capacity has become an urgent problem to be solved in shooting range measurement. The main research object of this paper is the storage system for large-scale photoelectric theodolite, which is also suitable for the storage applications of aerial image, meteorological radar, remote sensing, explosion experiment, fluid experiment and collision detection. This paper mainly focuses on the contradictions between high-speed data and low-speed storage devices, image and heterogeneous information in the same frame control, embedded Linux operating system transplantation, system miniaturization, image data coding and error correction, loss equalization of storage media, and so on. The high reliability storage of high speed data and miniaturization of equipment are realized. In this paper, the direct storage scheme of embedded system hardware platform combined with DM8168 and FPGA is adopted to avoid the bottleneck limitation of non-real-time operating system and computer structure, and only two chips are used to complete the error-correcting coding and collecting of data stream. Storage and network transmission control can reduce chip concatenation, reduce the average failure rate of hardware, and realize the miniaturization of the system. The strategy of adding different source information and image data in the same frame is adopted to ensure the strict same frame storage of the additional source information and image data. Combined with the two-dimensional characteristics of the image, this paper designs a two-dimensional RS coding error correction algorithm for real-time images with additional information, and carries out RS coding error correction on two dimensions. The algorithm improves the ability of correcting data burst errors and random errors. At the same time, the methods of collecting fault tolerance and image two-dimensional characteristic fault tolerance are also proposed, which ensure that the storage can not lose frame and frame, realize data error correction, frame error correction and row error correction, and improve the reliability of data storage. In this paper, the embedded Linux system is transplanted, the necessary driver is added, and the system independent module is cut out, which ensures the stable operation and management of the system. The system adopts the balanced management based on address sequence writing to the solid state hard disk. After traversing all the mapping addresses of the solid state disk, the image data is written, which prolongs the service life of the solid state hard drive. This paper presents a scheme to control the physical address of the mechanical disk, which can reduce the searching time and improve the storage speed. In the embedded system with DM8168 as the core, the task management breaks through the limitation of the hard disk file system, and the parameter information, such as the hard disk file allocation table, is recorded independently in the external FRAM of the storage medium. The design reduces the operating overhead of the Linux kernel to the hard disk file system, on the one hand, it is convenient to recover the mechanical disk data, on the other hand, it solves the problem that the file table of the solid state disk needs to be balanced and improves the reliability of the system. The storage system unit studied in this paper can store the data input of 400MBps camera in real time and stably, which greatly improves the storage efficiency and realizes the miniaturization design of the equipment. The application of block two-dimensional RS coding and error correction improves the coding and error correction capability by 1.97 times. The bit error rate is 1.01Ex11. The embedded storage system realizes task management, data remote network download and on-line maintenance of the system. According to the requirements of engineering application, the data source and stream allocation technology for high frame-frequency camera is adopted. After parallel concatenation of storage system cells, it can meet the needs of multi-domain storage applications.
【學位授予單位】：中國科學院研究生院（長春光學精密機械與物理研究所）
【學位級別】：博士
【學位授予年份】：2012
【分類號】：TP333;TP391.41
本文編號：2451168
[Abstract]:In the weapon test, the photoelectric measuring equipment should not only obtain the testing parameters of the target's outer trajectory and flight trajectory, but also obtain the high-precision flight attitude parameters, optical characteristic parameters and other conventional measurement parameters of the target. The acquisition of these parameters depends on the large array selected, the high-speed imaging information of the target from different angles obtained by the high-frame-rate camera, and the measurement information tracked by the device. This puts forward higher requirements for real-time recording of high-speed image data and synchronous measurement information. Therefore, the research on high-speed data-oriented storage system with reliable performance, small size and large capacity has become an urgent problem to be solved in shooting range measurement. The main research object of this paper is the storage system for large-scale photoelectric theodolite, which is also suitable for the storage applications of aerial image, meteorological radar, remote sensing, explosion experiment, fluid experiment and collision detection. This paper mainly focuses on the contradictions between high-speed data and low-speed storage devices, image and heterogeneous information in the same frame control, embedded Linux operating system transplantation, system miniaturization, image data coding and error correction, loss equalization of storage media, and so on. The high reliability storage of high speed data and miniaturization of equipment are realized. In this paper, the direct storage scheme of embedded system hardware platform combined with DM8168 and FPGA is adopted to avoid the bottleneck limitation of non-real-time operating system and computer structure, and only two chips are used to complete the error-correcting coding and collecting of data stream. Storage and network transmission control can reduce chip concatenation, reduce the average failure rate of hardware, and realize the miniaturization of the system. The strategy of adding different source information and image data in the same frame is adopted to ensure the strict same frame storage of the additional source information and image data. Combined with the two-dimensional characteristics of the image, this paper designs a two-dimensional RS coding error correction algorithm for real-time images with additional information, and carries out RS coding error correction on two dimensions. The algorithm improves the ability of correcting data burst errors and random errors. At the same time, the methods of collecting fault tolerance and image two-dimensional characteristic fault tolerance are also proposed, which ensure that the storage can not lose frame and frame, realize data error correction, frame error correction and row error correction, and improve the reliability of data storage. In this paper, the embedded Linux system is transplanted, the necessary driver is added, and the system independent module is cut out, which ensures the stable operation and management of the system. The system adopts the balanced management based on address sequence writing to the solid state hard disk. After traversing all the mapping addresses of the solid state disk, the image data is written, which prolongs the service life of the solid state hard drive. This paper presents a scheme to control the physical address of the mechanical disk, which can reduce the searching time and improve the storage speed. In the embedded system with DM8168 as the core, the task management breaks through the limitation of the hard disk file system, and the parameter information, such as the hard disk file allocation table, is recorded independently in the external FRAM of the storage medium. The design reduces the operating overhead of the Linux kernel to the hard disk file system, on the one hand, it is convenient to recover the mechanical disk data, on the other hand, it solves the problem that the file table of the solid state disk needs to be balanced and improves the reliability of the system. The storage system unit studied in this paper can store the data input of 400MBps camera in real time and stably, which greatly improves the storage efficiency and realizes the miniaturization design of the equipment. The application of block two-dimensional RS coding and error correction improves the coding and error correction capability by 1.97 times. The bit error rate is 1.01Ex11. The embedded storage system realizes task management, data remote network download and on-line maintenance of the system. According to the requirements of engineering application, the data source and stream allocation technology for high frame-frequency camera is adopted. After parallel concatenation of storage system cells, it can meet the needs of multi-domain storage applications.
【學位授予單位】：中國科學院研究生院（長春光學精密機械與物理研究所）
【學位級別】：博士
【學位授予年份】：2012
【分類號】：TP333;TP391.41
【引證文獻】
相關期刊論文 前1條
1 李樂樂;肖園;湯軻;;基于MSP430的簡易阻抗測量儀設計[J];科技視界;2013年02期
本文編號：2451168
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