【作者】 邵岩；

【导师】 马怀俭；

【作者基本信息】 哈尔滨理工大学 ， 测试计量技术及仪器， 2003， 硕士

【摘要】 本文对VXIbus C尺寸64通道数据采集模块的研制进行了研究。数据采集模块是组建各种VXI系统所必需的一种通用模块，它的研究对推动我国VXI技术的发展与应用具有重要意义。 VXIbus C尺寸64通道数据采集模块是具有VXIbus接口的基于寄存器基模块化仪器。本模块可根据预先设置的扫描地址序列、通道量程和触发方式进行数据采集，采样时钟和采样长度可以改变，测得数据经过板上CPU的实时处理后在64K的存储器中缓存。 论文主要研究内容包括： 1．根据VXI规范，在参阅了大量技术参考文献的基础上，进行了总体方案论证与分析。利用CPLD技术自行设计了VXI总线寄存器基集成化接口电路和数据采集控制电路，从而简化了电路的设计，提高了可靠性。 2．采用高精度采样A／D转换器CS5101A作为采集模块的核心芯片来完成模数转换，合理配置了A／D转换器外围电路及控制电路；利用高精度、低功耗氧化物半导体模拟开关MAX308／MAX309构建了64路模拟信号输入电路，可实现64路信号单端输入／32路差动输入，通道可自由切换，通道量程可程控转换。 3．采用功能强大的数字信号处理芯片TMS320F206作为本地CPU。利用DSP强大的数据处理能力，可以对采集到的数据进行实时处理和自动校准，减轻了主机的负担，减少了硬件的使用，提高了系统的稳定性；F206具有片内的32K字闪存存储器，减少了片外存储器的使用，降低了开发成本，而且将来可以进行在线升级。 4．采用CPLD控制逻辑外加通用静态高速存储器来实现采集后数据的高速缓存。 5．详细介绍了该数据采集模块的仪器驱动程序的技术要求及编写过程。更多还原

【Abstract】 The paper studied the development of VXIbus C-Size 64-channel Data Acquisition Module. Data Acquisition Module is a general module that is necessary to construct all kinds of VXI system. Its research is of great significance for promoting the development and application of domestic VXIbus technology.VXIbus C-Size 64-channel Data Acquisition Module is a register-based instrument with VXIbus interface. According to the reserved scanning address sequence, channel range and trigger mode, it can sample data. The module can change sample time and sample length. The sample data can be disposed by the CPU on board and then be stored in 64K Ram.The main contents are stated as followed:1. Based on many technological reference books, the paper makes the discussion and analysis of the whole scheme. The integrated register based VXIbus interface is designed by using the advanced CPLD technology. This method simplifies the interface circuit design and improves its reliability.2. High-resolution A/D converter-CS5101A is used as the core of the analog-to-digital conversion. Peripheral circuit is carefully configured. 64-channel analog signal input circuit is built with High-speed, high-resolution CMOS multiplexer-MAX308/MAX309, realizing 64-channel single-way signal input and 32-channel two-way input, flexible scanning and channel auto ranging.3. The powerful digital signal processor-TMS320F206 is selected as the local CPU. DSP can deal with the sample data at real time and auto calibration, take off the load of master CPU, reducing the quantity of hardware and improving the system reliability. There is 32K Word Flash Ram which can be used as program memory in F206, which is favorite to update the system in the future.4. The high-speed data buffer is designed by adopting CPLD and general high-speed static memory.5. It is introduced in detail that the technological requirements and programming of the instrument driver of the VXIbus data acquisition module.更多还原