中国光学, 2013, 6 (4): 577, 网络出版: 2013-08-28   

声光可调谐滤波器成像光谱仪实时预处理系统

Real-time pre-processing system of AOTF imaging spectrometer
作者单位
北京航空航天大学 精密光机电一体化技术教育部重点实验室, 北京 100191
摘要
为了快速实时地预处理声光可调谐滤波器(AOTF)成像光谱仪的数据, 分析了AOTF成像光谱仪数据特点及预处理算法, 采用数字信号处理器(DSP)作为核心器件代替传统的PC机处理平台, 提出了一种基于两片ADSP-TS201的外部总线共享与链路口混合耦合的双DSP并行处理系统方案。结合实际需求, 设计了流水线处理方式并合理分配预处理任务。用实验方法对系统的功能进行了验证, 结果表明: 双DSP并行处理系统完成一帧AOTF成像光谱仪数据的预处理仅需235 ms, 比原有PC机处理速度提高了13倍左右, 满足了实时性要求, 促进了AOTF成像光谱仪系统化、模块化、小型化并兼具实时处理能力的发展。
Abstract
In order to realize the rapid and real-time data pre-processing of an imaging spectrometer based on Acousto-optic Tunable Filter(AOTF), the data characteristics and a pre-processing algorithm of the imaging spectrometer based on AOTF were analyzed. Then, a scheme of dual Digital Signal Processor(DSP) parallel processing system based on two chips of ADSP-TS201 coupled the external bus sharing and the link ports was proposed by using DSP instead of the traditional computer processing platform as the key device. Proceeding from practical requests, a pipeline processing was designed, pre-processing tasks were allocated rationally, and the functional verification was implemented. The practical application shows that it takes 235 ms to accomplish the pre-processing task for one frame data of imaging spectrometer based on AOTF, which increases 13 times than that of PC and meets the real-time requirement. The system proposed in this paper promotes the development of systematism, modularization, miniaturization and the capability of real-time processing of the imaging spectrometer based on the AOTF.

赵慧洁, 宋汪洋, 张颖, 赵峰, 程宣. 声光可调谐滤波器成像光谱仪实时预处理系统[J]. 中国光学, 2013, 6(4): 577. ZHAO Hui-jie, SONG Wang-yang, ZHANG Ying, ZHAO Feng, CHENG Xuan. Real-time pre-processing system of AOTF imaging spectrometer[J]. Chinese Optics, 2013, 6(4): 577.

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