数据采集

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

The system applies the high-precise eddy current displacement sensor, virtual instrument technology, special mechanical structure, and high-precise data acquisition system, as well as data processing and analyzing. The results show that the present system has high performance in precision and efficiency.

采用高精度电涡流位移传感器和虚拟仪器技术、合理设计测量机械机构和数据采集与处理系统，使计算机可以精确测量微小位移量，为准确分析数据结果提供了有利的先决条件，使测量系统精度大大提高。

The application of linear array CCD-TCD132D equipment is used in this system, and the PCI data acquisition card is used to transmit data. The accurate measurement system is developed by visual C++. We bring forward a system calculagraph which can realize microsecond level. The system can ensure effectively that it is real-time, high-precision and high-speed.

本系统采用线阵CCD-TCD132D器件，使用PCI数据采集卡进行数据传输，利用VC++开发精确测量系统，并提出能够达到微秒级的系统计时器，有效地保证了系统的实时性、高精度、高速度。

In this paper,based on the development of automatic packaging production line of cathodal copper control system,for accurate measurement of copper weight in online in the project,studied the real-time communication between the industrial control computer and METTLER TOLEDO electronic balance,and through VB Control designed communication procedures to achieve data communications and data collection.

通过阴极铜自动包装生产线控制系统的研制，针对该项目中在线精确计量铜垛重量，研究了工业控制计算机与梅特勒-托利多电子秤之间的实时通信，并通过VB控件利用两种方法设计了通信程序，实现了数据通信和数据采集。

In the article, it briefly analyzes the necessity of monitoring the hydric parameters and the development status of monitoring system about the electronic power, then a real-time monitoring system for generator hydric parameters is presented, which applies the configuration software MCGS, radio-communication SMS, Modbus protocol and RS-485 bus .in the design of the system, MCGS is used to configurate the interface of superordinate computer and the device component of the wireless communication is authorized by Visual Basic; the transmitting and receiving flow through GSM(Global System for Mobile communication)in the way of SMS. The design of the smart communication module, which based on the RS-485 bus and Modbus protocol and the wireless communication interface module, which is connected with the wireless terminal based on Siemens TC35, are also expounded.

该方案利用MCGS组态软件进行上位机监控界面的组态；利用Visual Basic语言进行上位机无线通信设备构件的编制；并利用SMS通过全球移动通信系统GSM(Global System for Mobile Communication)网络实现报警等数据的无线传输；以Flash型超低功耗16位单片机MSP430F149作为通用通信模块控制器核心，开发出了基于RS-485总线模式和Modbus通信协议的远程数据采集模块，以及基于Siemens TC35的无线终端相连的无线通信接口模块。

With the increasing of transmiting current and reducing of the minimal discriminable voltage, the influence of geological interference becomes more evident, so it is very necessary to introduce feasible mathematical methods to direct and inverse calculation of TEM, such as ANN, GA. Via an experiment on a known-profile in a copper mine, it is validated that the flexibility of the system and feasibility of the interpretation software.

数据采集软件、后期处理解释软件的编制及解释精度问题由于发送电流的加大和最小可测电压的提高，在加大了勘探深度的同时，地质噪声和各种效应的影响将更加明显，从而对解释软件也提出了更高的要求，传统的数据处理解释软件不能满足要求了，因此有必要引入成熟的数学方法：如神经网络等，增加一维、二维的解释精度与速度，并对于特殊三维体作正演计算。

In the part of the displayer hardware design, the I/V convert circuit and the flame intensity signal processing circuit are introduced.

在介绍数据采集和频率测量原理后，给出软件设计和数据处理子程，频率信号处理子程，键盘子程等。

This system consists of three main modules: data collection and display module, data transmission module and software on the epigynous computer.

本系统分为三大模块，分别为数据采集显示模块，数据传输模块和上位机软件。

In the hardware design of acquisition system,PCI excusive chip,CPLD and buffer memory are adapted to achieve DMA transfer between computer and peripheral with steady-going transmission speed of 50MB/S.

在数据采集卡硬件电路设计中，采用了&PCI专用接口芯片+CPLD+缓存&模式，实现了计算机与外设间的DMA方式传输，数据传输率可稳定在50MB/S。

The experiment results show that they both have some advantages of phase consistency to sampling data,channel-chosen flexibleness and system-control easiness.

实验结果表明，两种数据采集系统都具有良好的数据相位一致性，并且通道选择灵活，系统控制简单。

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。