采集

According to the requirement of vibrating signal detection, this paper designs a multi-channel data acquisition system, which has a programmable signal amplifier, variable sample rate and sample time.

论文针对振动信号检测中数据采集和频谱分析的需要，设计了一种基于USB2.0的数据采集和谱分析系统。

This text introduced a kind of AC data sampling terminal unit based on 80C196KC, including its calculating method of AC data.

摘 要：介绍一种采用16位单片机80C196KC设计的交流数据采集终端，给出了各种交流采样参数的计算方法、硬件电路结构框图以及数据采集软件的设计原理。

In the software design, the image sampling flow are first discussed, and then a sensor compensation algorithm is proposed to equalize the sensitive error of each sampling unit in CIS, and at last, the image analysis scheme is discussed.

在软件设计中，首先讨论了图像采集流程，然后提出了传感器补偿算法，用于补偿CIS各采集单元的成像误差，最后讨论了图像分析流程。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此，我们基于以上的硬件环境设计了一个自适应同步控制器：首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态)，信号通过前置放大器、功率放大器等送到激震器动圈，并通过电磁感应产生振动，振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡，工控计算机根据采集卡的反馈信息，获取当前激震器动圈的振动状态y〓，并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识，再将两者输出误差e〓＝y〓-y〓对系统的有关控制参数进行调整，直至y〓→y〓，最后在经过某一固定的相位后，开始信号的正常扫描过程，与此同时，由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号，进而完成扫描相位同步控制过程。

The former is the core of hardware, it is based on industrial control computer that expended with analog signal input board and digital signals input and output board.

其中工控机是自动化测试系统的硬件核心，在工控机内扩展了数据采集卡和数字量I/O卡，完成对电源输入、输出信号的采集和对系统的控制。

According to these theories, a special mechanical test platform is established, the design and debugging of the temperature signal processing board are finished and the data acquisition and analysis system about the High speed motorized spindle is established based on the PC and data acquisition card.

在上述理论研究的基础上，搭建了高速电主轴专用的机械平台，完成了温度信号调理板的设计与调试，并构建了基于PC+数据采集卡的高速电主轴数据采集及分析系统。

The system lays NI PXI box,signal conditioning and data acquisition module in different places of the compressor with LabVIEW as the software platform to realize monitoring functions such as multichannel data acquisition,signal analysis,data store,data recall and so on.

通过在压缩机不同位置分布NI PXI机箱和信号调理、采集模块，LabVIEW为软件开发平台，实现了多通道数据采集、信号分析，以及数据存储、历史数据复现等监测功能。

In this paper an order tracking technique and double threshold trigger technique are developed to ensure the synchronous data acquisition and to eliminate the disturbance and noise in rocket speed signal.

由此可保证各倍频分量幅值的精度，减少频率泄漏，同时保证了各帧数据具有相同的相位基准。同步、同相基整周期采集需由转速信号触发采集来实现。一般情况下，涡轮泵转子上的测速盘为多齿盘。

Aim\ The sine wave curve fit method is introduced which is a simple and useful evaluation method to evaluate the sampling rate of data acquisition systems.

目的 介绍数据采集系统采集速率的一种简单实用的精确评价方法，即正弦波拟合评价法。

A new approach for measuring metal linear expansion coefficient is presented where CCD data collecting system is used and the single slit diffraction principle referred to in measuring the elongation extent to which the metal body expanses as the temperature increases.

根据单缝衍射原理，利用CCD数据采集系统来测量金属体随温度升高的伸长量，给出测量金属线膨胀系数的一种新方法。此方法采用CCD图象处理技术与计算机技术相结合，实现了数据采集、计算处理自动化。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。