基于USB2.0的光谱图像数据采集系统研究设计

80年代的成像光谱仪将成像技术和光谱技术结合在一起,在探测物体空间特征的同时并对每个空间像元色散成几十到上百个波段,为地球科学开创了崭新的应用前景。到90年代,新的成像仪器在保持空间分辨率和信躁比基础上,得到几百个波段的光谱图像数据,同时要求仪器动态范围大、位数高,且一般采用12比特量化或更多,结果是导致数据量的急剧上升,对数据的传输和记录造成了极大的压力。另一方面,现在的成像光谱仪器正朝着小型、轻型、低功耗方面发展。它们迫切希望有一种新的接口技术,采集海量数据,使用方便,甚至适于电脑应用。

Research and Design for Spectral Image Capture System Based on USB2.0 Bus

In1980s,Imaging Spectrometer took imaging technology and spectrum technology together,and provided new application for geoscience.Since1990s,technology of spectral Imaging has being greatly developed.The new imaging spectrometers are developing in the direction of pushbroom and optical-mechanical scan method existing together,using satellite,airplane and ground as platform,wideview,multiple bands,multiple quantify bits and high SNR.The development is faster and faster and it resulted in pressure to data transmission and recording.Various spectral image data capture systems based on PCI bus have been widely used because of their high transfer speed,but they have some disadvantages,for example,hard to install,limited number of PC slots.On the other hand,current spectrometers are developing towards small volumn and low power consuming.So USB2.0will be a good choice.