摘要
设计并实现了基于混合信号处理器（Mixed signal processor 430,MSP 430）和现场可编程门阵列（Field programmable gate array,FPGA）双控制器的拉莫尔频率范围内（1~3kHz）的电磁噪声测试系统。该系统采用并联低噪声运放减小等效输入噪声,通过程控窄带滤波控制通带带宽和128级增益可调,实现了对复杂空间环境下电磁噪声信息的获取;FPGA内建NIOSⅡ软核搭建数据采集系统,基于SPI总线实现数据在SD卡中的高效、快速存储。通过对室内、外实测数据的分析,验证了该系统设计的有效性。
An electromagnetic noise test system based on MSP430 and Field Programmable Gate Array（FPGA）dual controller in the larmor frequency range 1kHz ~ 3kHz is designed.The system reduces equivalent input noise by the parallel low noise operational amplifiers.The system realizes the controllable passband and adjustable 128 gain level to get more information about the current environment of electromagnetic noise.NIOS II soft core built in FPGA is used to set up data acquisition system,and the data are archived in the SD card by the SPI bus so as to realize effective data acquisition and storage. Analysis of the indoor and outdoor measured data verifies the effectiveness of the system.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第6期2034-2042,共9页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(41204079)
关键词
地面磁共振技术
电磁噪声
混合信号处理器
现场可编程门阵列
数据采集
surface MRS
electromagnetic noise
mixed signal processor（MSP）
field programmable gate array（FPGA）
data acquisition
