偏振光栅导航传感器电子系统设计  

Design of electronic system of polarization grating navigation sensor

作　　者：马强[1] 赵开春[1] 尤政[1] 

机构地区：[1]清华大学精密仪器系,北京100084

出　　处：《传感器与微系统》2014年第1期97-100,104,共5页Transducer and Microsystem Technologies

基　　金：中国博士后科学基金特别资助项目(201104127)

摘　　要：偏振光栅导航传感器的电子系统采用了适应图像处理的软硬件体系结构,使其能够实时处理全天域偏振信息,具有更高的分辨率和精度。为了验证这种新体系结构的可行性,并且提供研究图像提取航向信息算法的平台,在阐述偏振光栅导航传感器工作原理的基础上提出其电子系统的设计方案。此电子系统是在现场可编程门阵列(FPGA)上构建的可编程片上系统(SOPC),通过Cameralink协议获取前级偏振检测图像数据,经过硬件化的算法模块和Nios II处理器计算出航向方位,并将结果通过串行通信协议发送上位机。测试显示:此电子系统能够实现偏振图像采集和处理,输出数据更新率高达20 Hz,计算结果精度优于±0.01°,便于图像提取航向信息算法的硬件化验证。The electronic system of polarization grating navigation sensor utilizes a new architecture of hardware- software which adapts to real-time image processing of all-sky polarization information, which has higher resolution and precision. In order to verify feasibility of this new architecture, and provide platform, for research on algorithm for navigation information extraction from image, a design scheme for electronic system of sensor is proposed, on the basis of interpretating its principle for polarized light navigation. The electronic system is a system on a programmable chip （SOPC）based on FPGA, which acquires preceeding stage polarized detecting image datas through Cameralink protocol, through hardware algorithm modules and Nios II CPU to calculate course bearing and send to upper computer through serial communication. The test indicates that the electronic system is able to achieve the task of polarized image acquisition and processing, and update rate and calculating precision of output datas is up to 20 Hz and prior to ±0.01°respectively,and it is convenient for algorithm verifying navigation in- formation extraction from image in hardware circuit.

关 键 词：导航传感器 偏振光栅 图像采集 CAMERALINK 现场可编程门阵列 可编程片上系统 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TP391.4[自动化与计算机技术—控制科学与工程]