基于FPGA的惯性数据采集与存储系统设计

Design of Inertial Data Acquisition and Storage System Based on FPGA

在比较了MCU、DSP和FPGA的特性后,搭建了一个以FPGA为核心控制器的硬件平台;它采用NAND Flash作为存储介质,利用ADIS16355获取载体姿态信息,最终实现惯性数据的实时采集与存储,并通过USB模块完成与上位机的通讯;在简要介绍系统总体设计的基础上,重点讨论了系统的时序控制和数据的读写方法;该系统具有较高的角稳定度(陀螺漂移率小于0.015°/s),将其置于相机内,可较好地消除由于相机姿态变化产生的像移,保证了成像系统的稳定精度。

After the comparison of the characteristics of MCU, DSP and FPGA, a hardware platform is built with FPGA as the core controller. It used NAND FLASH as a storage medium and ADIS16355 as vehicle＇ s stance information acquisition. Finally real--time inertial data acquisition and storage is realized. The module of USB realizes the data communication between the acquisition and storage system and the computer. Firstly, the paper introduced tb.e design of the system. Then it discussed the design method of timing logic of control and the read--write of data. The system has high stability. If put it into a camera, it can avoid the image motion because of the camera attitude and assure the steady precision of the platform.