高精度加速度计串行数据读出系统研究  

The Research On The Serial Data Output System of The High Precise Accelerometer

作　　者：牛清红[1] 张春熹[1] 宋凝芳[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,100083

出　　处：《微计算机信息》2006年第02S期167-169,共3页Control & Automation

基　　金：第二炮兵预研项目

摘　　要：加速度计是惯性导航系统的核心部件,通常加速度计输出为模拟电流信号,为便于导航计算机的数字处理,需经过A/D、I/F或V/F转换。针对应用背景实时、高精度、宽动态范围的要求,本文采用高分辨率模数转换器和嵌入式现场可编程门阵列组成石英挠性加速度计串行数据读出系统,设计了系统的硬件和软件,测试结果表明,读出系统达到了量程±20g,测量精度万分之一,每秒输出40000个数据的目标。The accelerometer is one of the core components in the inertial navigation system. The accelerometers usually output analog signals which have to be converted by A/D, I/F or V/F in order to be processed by the navigation computer. For the sake of meeting all the requests that the application background required, such as a real time system, a high precision design and a wide dynamic range ,this paper chose the high resolution A/D converter and the field-programmable gate array to realize the high precision accelerometer serial data acquisition system. This paper introduces the design of the hardware and the software. And the test results show that the system reaches the targets, such as ±20g in the measuring range, 10-4 in measuring precision and 4000data/s in the output rate.

关 键 词：石英挠性加速度计 高分辨率模数转换 ADS1215 VISUAL C++ 

分 类 号：V241.4[航空宇航科学与技术—飞行器设计]