针对传统紫外光谱仪体积大、价格昂贵、测量时间长的缺点，研制了基于STM32和CPLD的小型化近紫外光谱仪。该仪器以STM32为主控制器，用CPLD驱动具有3648像素的紫外增强型线阵CCD来采集光信号，采用SD卡存储数据并通过液晶屏来显示测量结果。该系统主要由分光模块、信号采集与处理模块、A／D转换模块和STM32控制处理模块构成。利用多块线阵CCD，实现了从近紫外到可见光波段的测量。采用低压汞灯作为标定光源，利用三次多项式拟合的算法，实现对光谱仪的波长定标。所设计的仪器体积小、质量轻、成本低、稳定性好、操作简单，具有一定的实际推广价值。%According to the problem that traditional ultraviolet spectrometers are bigger, more expensive, and longer time spending,a near ultraviolet spectrometer was studied.Based on the design principle of smaller-size spectrometer,UV enhanced liner CCD with 3 648 Pixels was chosen and this spectrometer was controlled by STM32,signal was collected by the CCD which was driven by a CPLD,then the data was stored in SD card,and the results were displayed at a LCD screen .The whole working system includes spectral module,data acquisition and processing module,A/D conversion module and processing control module based on STM32T.hree pieces of liner CCD were used to realize the measurement from near ultraviolet to visible wavelengths .In order to cor-rect,low pressure mercury lamp was used as light source ,and the standards for wavelengths with the three polynomial fitting algo-rithm were givenT.he instrument has the advantages of small volume ,light weight,low cost,good stability,simple operation,thus can be widely used in industry in future.
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