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利用现场可编程门阵列(FPGA)的内部资源,在FPGA中实现了高精度时间间隔测量系统的设计。 相似文献
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介绍了ARM(advanced RISC machines,英国电子公司)和FPGA(可编程逻辑阵列)在水声浮标(文中简称新型浮标)数据采集存储中的应用。利用FPGA丰富的硬件资源实现新型浮标系统多通道同步采样,并在ARM模块中移植Windows FAT32文件系统,嵌入USB底层驱动,实现采集数据的高速存储。描述了系统设计与实现,并对该数据采集存储系统进行了通道隔离度、动态范围、系统自噪声和功耗等指标测试。实验结果表明,该系统通道隔离度90d B(参考1V);动态范围≥110d B(参考1V);系统自噪声≤40d B(参考1 n V);系统总功耗为4.2 W。 相似文献
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针对FIR数字滤波器的基本原理和结构特点,利用DSP Builder技术,将MatLab/Simulink设计工具和QuartusⅡ有效的结合起来,根据电网谐波分析的要求设计了64阶低通FIR滤波器,对该滤波器的性能进行了仿真,并将设计下载到FPGA中进行了硬件测试,测试结果表明:采用该方法设计FIR滤波器简单易行,可缩短设计进程,设计出的滤波器的性能稳定可靠,达到了预期目标。 相似文献
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针对中国科学院上海技术物理研究所研制的1500元红外线列焦平面探测器的输出特性,提出了以低噪声运放为核心的信息获取电路和以FPGA(Field Programmable Gate Array)为核心的数据预处理的设计方案,实现了驱动电路和探测器的良好匹配,较好地发挥了探测器高灵敏度的特性.测试结果表明,该方案不仅对系统获得优于50 mK噪声等效温差的高灵敏度成像起到了重要作用,足够宽的量化设计还保证了系统的动态范围和图像的丰富层次.该设计方案已成功应用在一些其他类型的红外焦平面探测器中. 相似文献
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I. G. Georgoudas G. Ch. Sirakoulis E. M. Scordilis I. Th. Andreadis 《Natural Hazards》2009,50(3):519-537
A two-dimensional (2-D) Cellular Automata (CA) dynamic system constituted of cells-charges has been proposed for the simulation
of the earthquake process. The CA model has been calibrated with the use of real data. The calibration incorporates major
seismic characteristics of the area under test. The simulation results are found in good quantitative and qualitative agreement
with the recorded Gutenberg–Richter (GR) scaling relations. The model is enriched with a powerful multi-parameter interface
that enables the user to load real data from different regions. This paper examines the on-chip realisation of the model and
its instrumentation. The CA model hardware implementation is based on Field Programmable Gate Array (FPGA) logic. It utilises
an array of 32 × 32 cells. Parameters that construct the local CA rule constitute the input data. The initial seed, which
to some extent corresponds to the seismic features of the area under test, is loaded in a semi-parallel way and the process
is completed in a certain number of time steps. The automatic response of the processor provides the corresponding GR scaling
law of the area under study. The hardware implementation of the CA-based earthquake simulation model is advantageous in terms
of low-cost, high-speed, compactness and portability features. It can operate as a preliminary data-acquisition filter that
accelerates the evaluation of recorded data as far as its origin time, spatial and magnitude completeness and quality are
concerned. Software that performs reliable automatic phase picking, as well as data elaboration, can be assembled next to
the earthquake recording instruments (the whole network) output to assure a quick and reliable iteration of the focal parameters
of a recorded earthquake (epicentre coordinates, focal depth and magnitude). The dedicated processor can be accommodated right
after this stage (before any manual elaboration) focusing on the near real-time development of a reliable qualitative dynamical
seismic record and a mapping of the seismic characteristics of the area. 相似文献