AOTF成像光谱仪多通道驱动系统设计  

Design of multi⁃channel drive system of AOTF imaging spectrometer

作　　者：常凌颖 靳梦竹 田轩 张强 CHANG Lingying;JIN Mengzhu;TIAN Xuan;ZHANG Qiang(School of Electronic Engineering,Xi’an University of Posts and Telecommunication,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《现代电子技术》2020年第20期18-22,共5页Modern Electronics Technique

基　　金：国家自然科学基金(51475190)。

摘　　要：根据1 500~2 500 nm的近红外声光可调滤波器(AOTF)成像光谱仪的工作要求,设计AOTF成像光谱仪多通道驱动系统。该系统采用STM32微控制器控制直接数字频率合成(DDS)芯片AD9959生成四路频率信号,同时STM32微控制器控制通道切换电路实现多个频率快速切换,提高数据采集效率。最后将切换输出的频率信号进行功率放大,达到AOTF成像光谱仪的工作要求。经实验测试结果表明,该文系统可生成频率30~80 MHz、功率达33 dBm的信号,满足1 500~2 500 nm近红外AOTF成像光谱仪的工作要求。A multi⁃channel drive system of acousto⁃optic tunable filter(AOTF)imaging spectrometer is designed according to the operation requirements of the near⁃infrared AOTF imaging spectrometer at 1500~2500 nm.In this system,the STM32 microcontroller is used to control the direct digital synthesis(DDS)chip AD9959 to generate four⁃channel frequency signals,and control the channel switching circuit to realize the fast switching of multiple frequencies and improve the efficiency of data acquisition.The switched output frequency signal is amplified to meet the operation requirements of AOTF imaging spectrometer.The testing experimental results show that the system can generate 33 dBm signals at 30~80 MHz,and meet the operation requirements of near⁃infrared AOTF imaging spectrometer at 1500~2500 nm.

关 键 词：AOTF成像光谱仪 多通道驱动系统 系统设计 频率切换 数据采集 系统测试 

分 类 号：TN741-34[电子电信—电路与系统]