惯导系统中加速度计的信号采集

Data Acquisition of Accelerometer in Inertia Navigation System

介绍了一种以压频转换为原理实现加速度计系统中数据采集的方法。以TI公司的数字信号处理器TMS320F240为核心,利用可编程定时/计数器8253对高性能同步压频转换器AD652的输出脉冲进行计数实现数据采集。分析了系统硬件电路设计方案和软件流程。结果表明,高性能同步压频转换器分辨率高、抗干扰能力强,能够满足惯导系统中加速度计数据采集的要求。

This paper introduces a design of data acquisition ways based on voltage to frequency conversion in accelerometer system. TMS320F240 is the core of data acquisition system, 8253 is a programable timer/counter, which takes count of the output pulse of AD652 to achieve data acquisition. The hardware and software are plan of the system is analyzed. The higher distinguish quotiety and better anti - interfere of VFC as well as its flexible application,and reliability for the quest of data acquisition in inertia navigation system.