基于RS码的某运载火箭图像测量系统设计与实现

Design and Implementation of a Launch Vehicle Image Measurement System Based on RS Code

为了更加直观地观察某型号运载火箭一二级级间分离、二级发动机工况、整流罩分离、星箭分离等重要动作及关键信息,更好的掌握火箭飞行过程中产品性能,提高产品可靠性,给出了一种基于RS纠错码的图像测量系统设计方案;RS码在信道传输过程中能有效纠正突发错误和随机错误,提高信号增益,改善射频信号通信质量;文中阐述了RS纠错码算法理论演算过程,根据现有遥测信道容量,设计出16字节的纠错码,除去12字节的子帧同步码和子帧计数,构造出RS码(184,168);给出实现该方案的原理架构,详细介绍了摄像机和图像压缩编码器硬件设计工作原理及嵌入式软件设计的架构及流程图;飞行试验结果表明,经过RS编码后的图像测量系统可以有效的解决图像画面马赛克、花屏、卡顿现象,全程画面清晰、流畅。

In order to more intuitively observe the important actions and key information such as one or two stages separation of a carrier rocket,two stage engine condition,the separation of the fairing,the separation of the star and the key of the rocket,we can better master the product performance and improve the product reliability during the flight of the rocket,and give a design of the image measurement system based on the RS error correcting code.RS code can effectively correct burst errors and random errors in channel transmission,improve signal gain and improve RF signal communication quality.In this paper,the algorithm of RS error correcting code algorithm is described.According to the existing telemetry channel capacity,a 16 byte error correcting code is designed,and the RS code(184,168)is constructed by removing 12 byte sub frame synchronization code and sub frame count.The principle architecture of the scheme is given.The principle of the hardware design of the camera and the image compression encoder,the architecture and flow chart of the embedded software design are introduced in detail.The flight test results show that the image measurement system coded by RS can effectively solve the mosaic,flower screen and carton phenomenon of the image,and the whole course picture is clear and fluent.