防伪纤维荧光检测仪性能优化研究

发布时间：2018-07-29 07:05

【摘要】：防伪纤维荧光检测仪器是一个由电路、光路组成的多体系统,各个系统的协调配合是仪器实现稳定检测的基础,而组成各个系统的零部件或者模块的性能提升为整个仪器性能的优化提供了保障。目前,利用荧光作为检测目标的高性能防伪纤维检测仪器的优化研究有所进展。因此,本文在借鉴国内外相关研究成果的基础上,进行了两方面的研究:探索了目前国内外防伪纤维检测仪器设计原理,分析了其优点与不足,为本文的优化设计提供参考;根据现有的防伪纤维荧光检测仪器的具体情况进行了详细的分析和实用的性能优化设计,并对检测仪器进行了波长标定。主要研究内容包括:1、设计防伪纤维荧光检测仪性能优化总体方案,根据防伪纤维的荧光特性,分析了荧光探测的要求,选出适合本课题的荧光探测器。分析了几种常用的光学结构,确定本仪器的光学结构,选取恰当的光学组件,完成光路设计,并完成波长标定。2、在前人的研究基础上,根据实际的课题研究需要,以现有的技术指标为基础,重新设计防伪纤维检测仪器的硬件电路。研究内容包括:CCD驱动电路、信号处理电路、数据采集与存储电路、接口电路及PCB制版。3、完善软件设计。具体包括:(1)单片机与FPGA结合使用实现CCD驱动最简化。(2)完成了以单片机为核心的软件控制、数据采集等功能。(3)全面优化软件,使得操作更简便、更稳定。最后完成整个检测仪性能优化设计,并对该仪器的测试结果进行分析和对比,在验证仪器正确性的基础上,综合评价仪器性能并给出进一步的优化建议。测试结果表明,防伪纤维荧光特性快速检测装置经过性能优化后可以完成以下主要技术指标,比如经过波长标定的仪器光谱测量范围为:458~591nm;分辨率达到2nm;波长检测准确度为98.5%;半宽检测准确度为92.8%;相比前人的研究,动态检测速度可达204次/分钟,提高了一倍。
[Abstract]:The anti-counterfeiting fiber fluorescence detection instrument is a multi-body system composed of circuit and optical circuit. The coordination of each system is the basis for the instrument to realize stable detection. The performance of components or modules that make up each system provides the guarantee for the optimization of the performance of the whole instrument. At present, the research on the optimization of high performance anti-counterfeiting fiber detection instrument using fluorescence as the detection target has been made. Therefore, based on the relevant research results at home and abroad, this paper has carried out two aspects of research: explore the design principle of anti-counterfeiting fiber testing instrument at home and abroad, analyze its advantages and disadvantages, and provide a reference for the optimization design of this paper; According to the specific conditions of the existing anti-counterfeiting fiber fluorescence detection instruments, the detailed analysis and practical performance optimization design are carried out, and the detection instrument is calibrated at wavelength. The main research contents include: 1, the design of anti-counterfeit fiber fluorescence detector performance optimization scheme, according to the anti-counterfeiting fiber fluorescence characteristics, analyzed the requirements of fluorescence detection, selected a suitable fluorescence detector for the subject. Several commonly used optical structures are analyzed, the optical structure of the instrument is determined, the appropriate optical components are selected, the optical path design is completed, and the wavelength calibration. 2. On the basis of previous research, according to the actual research needs, Based on the existing technical specifications, the hardware circuit of anti-counterfeiting fiber detection instrument is redesigned. The research contents include: drive circuit, signal processing circuit, data acquisition and storage circuit, interface circuit and PCB plate making. 3. Perfect software design. The main contents are as follows: (1) the combination of MCU and FPGA is used to realize the most simplified CCD driver. (2) the functions of software control and data acquisition based on SCM are completed. (3) the software is optimized in an all-round way, which makes the operation simpler and more stable. Finally, the performance optimization design of the whole instrument is completed, and the test results of the instrument are analyzed and compared. On the basis of verifying the correctness of the instrument, the performance of the instrument is evaluated synthetically and further optimization suggestions are given. The test results show that the following main technical indexes can be accomplished by the fast detecting device for the fluorescence characteristics of anti-counterfeiting fibers after the performance optimization. For example, the spectral measurement range of the instrument calibrated by wavelength is: 458,591 nm; the resolution is 2 nm; the detection accuracy of wavelength is 98.5; the accuracy of half-width detection is 92.80.Compared with previous studies, the dynamic detection speed can reach 204 times per minute, which is twice as high.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH744

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