MIMU定位定向系统数据采集装置的设计

Design of MIMU Data Acquisition Instrument for Positioning and Directive System

介绍了一个用于微型惯性测量组合 ( Micro inertial measurementunit,MIMU)定位定向系统的数据采集装置。该装置由数据采集模块、数据处理模块、数据下载模块组成。数据采集模块用 1 6位高精度 AD6 76和浮点放大器采集 MIMU输出信号 ;数据处理模块采用主从式紧耦合双处理器结构 ,分别以数字信号处理器 ( DSP)作为数据处理机 ,单片微控制器作为 I/ O接口处理机 ;数据下载模块增设了通讯监听处理器 ,以提高数据下载传输的可靠性。文中还介绍了数据采集的软件设计。该系统结构简单 ,满足了定位定向系统在数据采集处理方面提出的诸多性能指标 ,为捷联定位定向系统的小型化提供了一种新的思路。

A micro-inertial measurement unit (MIMU) data acquisition instrument is introduced for positioning-and-directive system. It is made up of three parts: data acquisition, data processing and data download interface modules. Data acquisition uses a 16-bit high precision AD676 and floating-pointing amplifier to complete the MIMU data A/D conversion. Data processing module with a close-coupled master-slave dual processors employs a digital signal processor (DSP) as its data processor and a micro-controller as its I/O interface processor. Data download interface module develops a communication monitor to enhance data transmission reliability. The data acquisition software design is also introduced. This instrument has some characteristics of simple structure, and meets the requirements for SINS on data acquirement and processing capability, so it uses a new access to decrease the dimension of strap-down positioning-and-directive system.