探空火箭图像采集与传输系统软件设计与实现

Design and Implementation of Software of Image Acquisition and Transmission System for Sounding Rocket

针对探空火箭对实时采集图像数据的需求,设计了一种基于嵌入式系统的图像采集与传输系统软件,实现了图像采集,图像压缩,数据打包组帧,信道编码,数据发送等功能,同时使用DDK开发了接口卡驱动程序;软件采用模块化设计,为了满足功能和性能的需求,采用多线程技术实现任务间的调度;软件实现之后,设置数据发送速率为2Mbps,图像采集间隔为3.5s,长时间的测试表明,本系统性能稳定,达到了预期的设计目标。

This paper designs a new type of software of image acquisition and transmission system based on embedded system in order to meet the requirement of real--time image data acquisition of the sounding rocket. The software implements the image acquisition, image compression, data packing, data frames generation, channel coding and data sending. This paper also uses DDK to develop interface card driver. On the design of software, modular design and Multi--Threading technology is adopted. After the implementation of the software, this paper sets data transmission speed to 2Mbps and sets the interval of image acquisition to 3.5 seconds, long--term tests show that the system has stable performance and achieves the expected goal.