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DSP-based embedded controller onboard camera research

Author: XuMuShui
Tutor: LiuJinGuo
School: Graduate Schoo,Chinese Academy of Sciences
Course: Optical Engineering
Keywords: Camera Controller Floating-point DSP Embedded real-time systems μC/OS- Ⅱ CAN bus
CLC: V445.8
Type: Master's thesis
Year: 2010
Downloads: 49
Quote: 0
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Abstract


With the development of satellite technology, short design cycle and low cost small satellite applications are increasingly widespread, has been successfully used in scientific research, mapping, military, communications and other fields. Satellite space camera controller as a next-bit machine systems, camera systems and satellite platforms is a link between some of the important features responsible for camera control and operation management. In order to meet the requirements of small satellite systems, design a simple, real-time, high reliability, low cost, data processing ability of the camera controller for the purpose of this study. This stems from the lower spatial mapping camera systems mission requirements, introduced a DSP and FPGA camera controller design, detailed account of the camera controller hardware systems and modules (including mode control, communication control, focus control, etc. ) concrete realization; analysis of CAN bus in the small satellite communication system applications advantages, the DSP and CAN bus communication circuit design; were introduced with the imaging unit, an encoder unit, etc. The RS422 communication module communication circuit implementation , as well as for the ground camera controller USB communication circuit design debug; software designed DSP platform space camera image motion velocity calculation and pattern control software program; describes the use of FPGA implementation UART asynchronous serial port, logic control, such as the specific process interrupt is generated; analysis of embedded real-time operating system μC/OS- Ⅱ characteristics, operating principles and applications in the system μC/OS- Ⅱ task scheduling and task synchronization. The μC/OS- Ⅱ into the camera control system and controller functions of the camera module camera lower computer software is divided into multiple μC/OS- Ⅱ tasks discussed the programming task and synchronization methods. Also developed a CAN communication protocol, complete camera control computer with satellite communications software. USB firmware and prepared the ground debug applications, providing users with the camera control system human interface for easy system ground debugging. Finally, the system software design reliability and timeliness are briefly analyzed. Finally, given the camera controller system debugging with the experimental results, and the work of this thesis are summarized, analyzed the problems to be solved, for future work are discussed.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Space instrument,spacecraft devices,spacecraft guidance and control > Protection, life-saving technology and equipment > Photographic apparatus, equipment
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