基于LabVIEW的双通道太阳射电频谱观测系统设计

Design of Dual-channel Spectrum Observation System Based on LabVIEW

太阳射电爆发是太阳耀斑和日冕物质抛射等爆发过程的重要表现形式,是卫星通信和导航系统、地面电网系统、人类生活环境的潜在影响因素之一。对太阳射电爆发的监测与研究不仅可以预报空间天气,还可以作为太阳物理的研究工具。介绍了基于LabVIEW平台设计开发的双通道高速太阳射电频谱观测系统,针对太阳射电爆发具有随机性和持续时间短、变化快的特点实现对太阳射电爆发的监测。系统采用高速信号采集卡以1.5 GS/s的速率进行信号采集,系统时间分辨率可达4 ms,频率分辨率达45.7764 kHz。采集的信号经过快速傅里叶变换(Fast Fourier Transform,FFT)功率谱分析处理后输出显示其频谱图和瀑布图,得到太阳射电爆发的频率、强度以及持续时间等信息。观测数据利用文件传输协议(File Transfer Protocol,FTP)上传至服务器,实现存储资源的优化,观测数据的共享。该系统集成度高,可以应用于分析澄江抚仙湖观测基地11 m太阳射电望远镜输出的70~700 MHz信号。

Solar eruptions are important manifestations of solar activity,including solar flares and coronal mass ejections(CMEs).They can potentially impact satellite communications and navigation systems,ground power grid systems,and the human living environment.Monitoring and studying solar radio bursts not only enable the prediction of space weather but also serve as a research tool in solar physics.This article introduces a dual-channel high-speed solar radio frequency spectrum observation system designed and developed based on the LabVIEW platform.It aims to monitor solar radio bursts,which are characterized by their randomness,short duration,and rapid changes.The system utilizes a high-speed signal acquisition card with a sampling rate of 1.5 GS/s,providing a time resolution of up to 4 ms and a frequency resolution of 45.7764 kHz.The acquired signals are processed through FFT power spectrum analysis and displayed as frequency spectra and waterfall plots.The system extracts information such as the frequency,intensity,and duration of solar radio bursts.The observed data is uploaded to a server using the FTP file transfer protocol,optimizing storage resources and facilitating data sharing.This integrated system is specifically applied to analyze signals in the frequency range from 70 MHz to 700 MHz output by the 11-meter solar radio telescope at Chengjiang Fuxian Lake Observatory.