【作者】 张冲；

【导师】 封维忠；

【作者基本信息】 南京林业大学 ， 森林经理学， 2006， 硕士

【摘要】 SPR光谱仪是一种重要的光学仪器,广泛用于科学技术的各个领域。高精度的CCD数据采集系统是光谱仪的一个重要组成部分,传统的光谱信号采集系统通常是以板卡的形式安装在PC机内,已不能满足光谱仪的微型化要求。本课题研究SPR光纤光谱仪的USB接口和应用软件,以期研发出一个基于USB技术的微型光谱仪的数据采集系统,为光谱仪的微型化和实用化提供一定的技术基础。本文在查阅大量文献并分析了SPR光谱仪的发展趋势以及光谱信号采集系统的研究现状的基础上,提出了CCD驱动电路、数据采集电路和数据传输方式的设计方案。本文从CCD工作原理入手,对CCD电子电路部分进行了深入研究,设计了CCD的硬件电路。基于CPLD技术设计的CCD驱动电路,具有功耗低、速度快、抗干扰性强的特点,可减小电路的体积和提高工作频率。在数据传输部分设计中,采用了具有较高传输速度、支持即插即用和热插拔,以及主机供电等优点的通用串行总线(USB)。并合理选择USB控制器及其开发系统。设计确立USB接口系统框架,设计出实际系统电路。进行WDM驱动程序和单片机固件程序以及应用程序的设计。本文的研究最终实现了CCD信号的稳定输出和数据采集系统的工作并给出了调试数据,总结了系统的各方面性能和存在的问题,为进一步的研究积累了经验。更多还原

【Abstract】 SPR spectrometer is an important optical instrumet.It is widely used in various areas of science and technology.The CCD data acquisition system with high precision plays a role of great significance . The traditional data acquisition system is usually installed inside computer ,there are some problems such as influencing system precision because of disturbing in PC.It can’t satisfy the requirement of the micro-type of spectrometer. We study and develop USB interface and appliced software of micro fiber spectrometer of Surface Plasmon Resonance (SPR), a data acquisition system of micro-spectrometer based on USB,while will set some technique foundation for micromation and application.The paper is base on numerous research works and analyzing for data acquisition system of SPR spectrometer,We put forward a design project about CCD driver circuit,data acquisition circuit and data transmission.In this paper, the operating principle of CCD is described firstly, then the electronic circuit of CCD is studied deeply and designed. The CCD driver circuit is based CPLD ,it possess small volume、low power waster、fast traansmission、high anti-jamming etc.To make data communication effective and not expensive, the Universal Serial Bus (USB) was adopted as the system’s communication bus .USB has a preferable data transmission rate ,support PC’s plug-and-play architecture and bus-powered.Accroding to the characteristics of the data acquisition system, an appropriate controller and its development kit are selected .The framework of USB interface system is established and the circuit is produced .The firmware program of PDIUSBD12 with the collecting function,the data transmission are established,The USB device driver with the function of responding USB transmission are established.The applied program with commnication and control the function is established.In the experiment, the steady output CCD and the data acquisition system operation are achieved, the test data are given out, the system’s performance and problem are summarized which can provide some experience for further research.更多还原