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设计了一套高速数据采集系统,系统基于Xilinx Zynq-7000系列全可编程平台,在Zynq内部实现了数据采集时序控制、高速脉冲计数、异步先进先出存储器(Frist in First out,FIFO)控制等功能。该系统中计数器为32位,采样频率400MHz,误差≤0.035‰。设计了信号调理电路,该电路实现了从离子脉冲信号到Zynq可直接接收的LVTTL电平转换功能。将该系统接入三重四极杆质谱仪进行聚丙二醇(Polypropylene glycol,PPG)质量分析实验,可得到高质量的谱图。该系统具有集成度高、大量程、高精度等特点。 相似文献
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《真空科学与技术学报》2020,(2)
设计了一套高速数据采集系统,系统基于Xilinx Zynq-7000系列全可编程平台,在Zynq内部实现了数据采集时序控制、高速脉冲计数、异步先进先出存储器(Frist in First out,FIFO)控制等功能。该系统中计数器为32位,采样频率400MHz,误差≤0.035‰。设计了信号调理电路,该电路实现了从离子脉冲信号到Zynq可直接接收的LVTTL电平转换功能。将该系统接入三重四极杆质谱仪进行聚丙二醇(Polypropylene glycol,PPG)质量分析实验,可得到高质量的谱图。该系统具有集成度高、大量程、高精度等特点。 相似文献
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利用自行研制的高速采集系统,通过测量和数据处理软件来实现角速度波动信号的采集和处理,利用定时测角原理实现瞬时角速度的测量,并通过实验验证了该方法的可行性. 相似文献
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通道间信号传输延迟时间是多通道高速数字采集系统的一项重要评价指标.本文应用Hilbert Huang变换对采集到的单频正弦信号进行数字信号滤波处理,对滤波后的数据进行Hilbert变换得到信号的瞬时相位,可以精确识别信号源的频率,并能够方便地得到通道问信号传输延迟时间.为高速数字采集系统通道间信号传输延迟时间分析提供了... 相似文献
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介绍了一种用于lamb波投影成像系统的数据采集电路的设计,真整个采集系统以FPGA芯片为核心,实现了对接收超声波信号的前期预处理、高速A/D转换、高速数据缓存和高速数据通信等一系列功能。 相似文献
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高分辨同步数据采集处理系统设计 总被引:3,自引:1,他引:3
设计了一种Delta-Sigma技术的24位高分辨率同步数据采集系统.该系统具有2个差分模拟输入通道,并具备扩展到8个差分模拟输入通道的能力,具有高速、高分辨率、低功耗三种工作模式.板载DSP完成数据的缓冲,并通过RS232/USB2.0接口与上位机通信,接收上位机的控制命令,向上位机发送采样转换数据.VB6.0开发的Windows数据采集处理程序具备了诸如采样参数设定、波形和数据显示、滤波、信号参数测量和频谱分析等功能,构成了一个功能完备的24位分辨率的同步数据采集处理系统. 相似文献
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New digital communication receivers often oversample an intermediate frequency (IF) or baseband signal at a very high rate (16 to 32 times the IF frequency or bit rate) as a means to demodulate the encoded data and synchronize the recovered clock. Unfortunately, an asynchronous data source can result in metastable errors and its effect on communications system performance has not been analyzed before now. Fortunately, our results demonstrate the vitality of 1-bit quantized IF high-speed digital signal processing. We review a practical measurement technique using a digital sampling oscilloscope that can be easily applied to today's digital signal processing systems. This method is used to collect data on a high-speed digital gate array technology used for a digital communication receiver, and the statistics of packet error rate are calculated. The analysis shows the substantial robustness of fast gate array logic and the importance of selecting the right technology. The technique and analysis presented can be applied to other digital systems 相似文献
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设计并实现了一种基于PCI总线的高速数据采集系统,主要包括模拟输入、信号调理、模数转换、数据传输存储以及计算机接口等部分.此系统可用于对某型号电子舱信号群进行实时高速采集,其性能和指标均满足要求. 相似文献
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《IEEE transactions on instrumentation and measurement》1977,26(4):351-355
A new and simple method is presented for fault detection of logic circuits. This method describes hexadecimal dynamic mapping, an alternative "signature," of a digital system on the screen of an existing ordinary oscilloscope. This "signature" consists of a matrix of dots and ones, each dot and/or one representing the logic state of four channels, simultaneously. The number of channels may be increased to more than four at the expense of the simplicity of the hardware of the system that implements the system. The method, furthermore, lends itself to the generation of Karnaugh maps displayed on the screen of an oscilloscope for two or more variables. The true states of a Boolean function are displayed by ones while the false states by dots on this visual Karnaugh map. The generated map may be used in the minimization of combinatorial logic circuits, in the absence of other more advanced simulating techniques, or in the educational field for better comprehension of redundant circuits. The method presented herein, is based on the Lissajous patterns of digital signals, and it may also be used in matching digital signals and detecting phase difference and squareness of pulses, qualitatively. 相似文献
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A method for measuring frequency switching time in fast switching frequency synthesizers is described. The fast frequency switching waveform is digitized by an oscilloscope, and the switching transient is recovered by digital demodulation. The method can be used to measure the switching time for any fairly wide frequency steps within the acquisition bandwidth of the digitizing system, and it is insensitive to signal amplitude variations. Some results of measurements on a frequency agile signal simulator are presented 相似文献
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《IEEE transactions on instrumentation and measurement》1969,18(4):299-306
The Computer Augmented Oscilloscope System (CAOS) is a laboratory-computer terminal intended for experiments involving waveforms and their interpretation. The terminal is portable and can be used wherever telephone access to a suitably programmed computer is available. The CAOS laboratory equipment includes a sampling oscilloscope with a storage CRT, the terminal proper, and a telephone line connection. The terminal includes alphameric and function keyboards, A/D and D/A converters, a read-only store character generator, sequencing and control logic, and circuits for interfacing to the oscilloscope and the telephone line. CAOS is an interface between the experimenter, the experiment, and the computer. It provides digital acquisition of waveform data, system calibration, data analysis, experiment control, and graphic and alphameric display. CAOS can emulate a number of laboratory instruments and can operate additional X-Y storage oscilloscopes. 相似文献
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该系统为分布式测试系统,由二台前端数据采集与予处理机和一台中心数据处理机构成。具有低速、高速两种数据采集能力。每台前端机具有三十二路模拟信号来集、予处理、远程显示和数据通信功能,数据处理机主要完成前端机的初始化、数据通信、测试数据的实时处理和事后处理等任务。高速采集由高速A/D转换器实现,本系统可实现40kW/s的高速采集与测试数据的连续存盘。 相似文献