The high speed data acquisition system accomplishes mostly the data acquiring and data storing as soon as possible . how to transfer data from data acqusition card to hard disk is the key technology to ensure the whole system working rapidly and precisely 高速数据采集系统主要完成实时数据采集和数据存储。其中如何解决数据传输是保证系统实时准确的采集数据、保存数据的关键。
The measurement system consist of computer , 16 - channel high speed data acquisition board , spark plug pressure sensor , crank angle signal generator , charge amplifier and oscillograph . the max acquisition frequency of this system is 1mhz 由通用微机、 16通道无相差高速数据采集卡、火花塞式压力传感器、角标信号发生器、电荷放大器、示波器组成的高速数据采集系统，最高总采样频率为1mhz 。
In this paper , we describe the research and realization of the high - speed data acquisition system applied in initial velocity radar . the sampling rate can reach 40msps , and the resolution is 12 bits . the acquisition speed that the system provides can be altered 本文介绍了基于初速雷达的高速数据采集系统的研制和实现方法，该系统提供了最高40mhz的采样速率、 12位采样精度的数据采集通道，且采样频率可调。
The traditional program control mode being cpu centre can not satisfy the requirement of the high speed data acquisition system . in this dissertation the dma mode is adopted to complete the data trasferring in which hardware replaces software partly and in the result the transferring speed improves greatly 传统的以cpu为中心的程序控制方式难以满足高速数据采集系统的需要，论文采用dma方式实现数据传输，由硬件代替软件，大大提高了数据传输速度。
High - speed data acquisition system based on pci bus , which takes full advantage of the merit of the pci bus , realizes the real - time sampling , transmission and storage of video signals , and supplies the convenience of real - time signals processing . it is necessary to develop the data acquisition devices based on pci bus 基于pci总线的高速数据采集系统充分利用了pci总线的优点,实现了对视频信号的实时采集、传输和存储,为信号的实时处理提供了方便,开发以pci总线为基础的数据采集设备是技术发展的必然要求。
The system accomplishes ultrasonic pulse transmitting and receiving , signal amplitude adaptive adjusting , data acquiring , echo searching , data processing and analyzing . different algorithms for echo searching , filtering and time difference measuring are proposed based on the thorough analysis of ultrasonic echo signal 研制的超声波液压测量系统由超声波探头、超声波收发系统、高速数据采集系统和计算机构成,实现了超声波信号的发射、接收、自动增益控制、数据采集、自动搜索回波、数据处理、分析等功能。
About us with more than 10 years of experience in providing integrated embedded solutions , and trustful business relationships with telecom industrial control simulation defense accounts , beijing fountain s current offering starts with a spectrum of embedded computing platform based on the compactpci vme standards and technologies to local market 公司在语音数据通讯无线通讯过程控制实时仿真模拟高速数据采集系统以及数字信号处理等领域的具有十多年的经验，为用户提供技术咨询方案论证及复杂系统的集成等技术服务。
With reference to internal and international correlation research achievement , and by analyzing the technique require to high - speed data sampling system used in relay test , the thesis brings the whole plan forward : the data sampling system is on core of dsp and expands apparatus based on dsp . they form a least system and are made to a high - speed data sampling card 为采集继电器分断时产生的过电压及电流信号，本文借鉴国内外相关研究成果，在充分分析继电器试验中数据采集系统性能要求的基础上，提出了整个高速数据采集系统的总体设计方案：系统采用以dsp为核心，以及dsp的外扩器件，构成了最小系统。
Analyzed the correlative theory of signal integrity such as reflection , crosstalk , simultaneous switch noise etc in detail , 2 . simulated reflection and crosstalk , gave the corresponding waveforms , and summarized the solutions to reducing reflection , crosstalk and ssn , 3 . using the method of signal integrity analysis , finished the pcb design of high speed data sampling system independently , 4 本文所完成的工作主要有以下几个方面: 1 .对引起信号完整性问题的反射、串扰、 ssn进行了较深入的理论分析; 2 .给出了在常见情况下解决信号完整性问题的一些方法,并进行了相应的仿真验证; 3 .运用信号完整性分析方法,独立完成了高速数据采集系统pcb板的设计制作; 4 .完成了系统ad部分的调试。
The vxibus c - size and i , q channels are employed in this module design , and the sampling rate in each channel reaches 500mhz . the memoty deep of the system is 2mb each channel and cpu is high - speed embedded cpu ( powerpc ) . the timing and logic function are fulfilled by fpga . after the disscusion of signal adjusted , the detailed scheme of this module design have been showed . in this design , there is much logic function design , and it is very strict with the hardware language program . so the basic flow of hardware program design and several very important methods of high speed logic function design , which is described by vhdl , are introduced . also , expatiated the inner modules structure of fpga for forepart circuit , the keystone and difficulties of the design . the design of high - speed pcb is another difficuty of realizing high - speed data acquisition system , and it is very important . the timing simulating results of several pivotal modules are depicted . high - speed signal paths are terminated to match the characteristic impedance . the design undergoes integrity analysis and software simulation 在本模块的设计中,有着大量的逻辑设计,对硬件语言程序的编写要求比较高,因此,文中介绍了硬件程序设计的基本流程,以及几种基于vhdl硬件语言设计在高速逻辑设计中非常重要的方法。同时阐述了本模块设计的前端fpga的内部模块结构,设计的重点、难点,并给出了重要模块的时序仿真结果。高速pcb的设计也是目前实现高速数据采集系统的难点和重点,文中详细的阐明了高速pcb设计中的注意点,以及作者在设计本模块时的经验和心得。
