能源计量器具识采系统的设计与实现

数显式计量器具识采系统利用自主开发的图形识别数据提取技术,结合现场设备,主动识别计量器具上显示的数字,传送到能耗数据采集终端,是能耗数据实时采集的良好补充。     

LabVIEW在虚拟仪器远程数据采集系统中的应用

针对复杂的测试系统的数据采集方法的局限性，提出了一种基于虚拟仪器的远程数据采集系统的软件设计方法，介绍了网络化虚拟仪器及其软件开发平台LabVIEW。运用LabVIEW开发了用于远程数据采集的虚拟仪器，并阐明了其网络协议、硬件、软件设计原理。利用服务监听机制和datasocket技术，通过局域网开发该虚拟仪器可实现网络测试数据的实时发布与读取。     

虚拟仪器在供热系统数据采集及处理中的应用

以供热生产环节为重点,基于虚拟仪器技术,研究设计了供热先进过程控制中的数据采集与信号处理系统,该系统可以完成信号采集、数据处理、存储以及图形显示等功能,具有实时性好、数据处理能力强和易于功能扩展等特点.     

USB2.0接口数据采集分析系统的设计及应用

针对三维动态目标跟踪测量的技术要求，设计了一个具有USB2．0接口的高速数据采集装置。该系统完成信号采集、传输和电机控制任务，作为下位机与PC机协作可以进行动态目标跟踪测量。     

基于普通PC机和智能仪表的远程数据采集系统

介绍了以普通PC机和智能仪表为基础研制开发的一种低成本计量数据采集系统，详细阐述了数据采集的过程、系统的构成、功能和特点。     

基于虚拟仪器技术的网络性能测评系统的设计

介绍了虚拟仪器的概念及虚拟仪器的形成，提出了一种新的网络性能测评系统的设计方法——基于虚拟仪器技术的网络性能测评系统的设计，介绍了该系统的数据采集、网络性能分析、数据显示、数据库管理和主控模块等功能模块的设计和软件设计，并给出了该系统的应用实例。     

心电图机检定仪ECG组合测试波形的检测识别

提出心电图机检定仪输出的ECG组合测试波形的检测识别方法,基于虚拟仪器技术,使用数据采集卡对ECG组合测试波形进行采集,通过LabVIEW编程实现心电图机检定仪ECG组合测试波形的各波段的幅值和时间间隔参数的检测和识别。     

含氟杀虫农药及其在茶树上应用前景

20世纪70年代末含氟农药开始开发,在世界上农药商品中,含氟农药约占15%,在近10年开发的新农药品种中,含氟化合物约42%。-CF3、-OCF3、-CHF2、-OCHF2、OCHF2等基团连在芳(杂)环上农药是目前研究开发的热门,含氟农药中的杀虫性农药开发较多,在茶树上应用逐渐增多。     

Virtual instrument for instantaneous power measurements

A computer-based data acquisition system coupled by means of a general-purpose instrumentation bus (IEEE488/GPIB) with a digital oscilloscope is used to create a virtual instrument with instantaneous and average power measurement capability. The software signal-processing capability of the data acquisition system was used to compensate instrument measurement deficiencies and to enhance signal capture. The virtual instrument is shown to provide instantaneous, AC, and fitted-power averages and time-based plots of power variations for both linear and nonlinear system responses to external excitation. Data taken on a resistor, capacitors, an AC-to-DC power converter, and a bipolar junction transistor inverter establish a ±3% sensitivity with a 10-μW-100-W range over a 1-Hz-10-MHz frequency span     

汞离子频标数据采集系统的小型化设计

为实现汞离子微波频标电子伺服系统的小型化,设计了一种基于FPGA的汞离子频标数据采集系统。采用宽带、高速、低功耗的微芯片电路模块对离子跃迁谱线的微弱荧光信号进行放大、整形、降噪处理;利用FPGA高速光子计数法对信号进行采集。取代了传统的计算机软件LABVIEW与商用仪器结合的数据采集系统,实现了对离子微波频标物理系统中微弱荧光信号的有效采集。     

A Review of Data Acquisition System based on LabVIEW

With the continuous development and expansion of automotive industry,car safety problems are widely concerned by most of us. In order to make it easier to adjust car' s real-time body posture,it is necessary to design a real-time data acquisition system,thus reducing the number of casualties in normal driving. A brief account of the development status of data acquisition system at home and abroad,and the concept,principle,function of virtual instrument platform are given. The advantages and disadvantages of the data acquisition system,based on LabVIEW in different methods of data acquisition,are analyzed and compared,and put forward some improvements and optimization,so the real-time data acquisition system can meet the requirement of adjusting the state of the vehicle,improving real-time of data acquisition and processing. Finally,it indicates the development direction and prospect of data acquisition system based on LabVIEW.     

跌落试验数据采集及分析系统研究

针对跌落试验机使用中很少使用数据采集与分析的问题,提出并研究了一种解决方案,利用较少投入提升跌落试验机的应用范围和研究价值;完成了一种基于LabVIEW的包装试验虚拟仪器应用研究;总结了在数据采集、分析和存取以及人机交互方面所做的工作和取得的进展。     

聚合物动态流变测试系统虚拟仪器研究与设计

为了满足高分子成型加工理论对高性能和多功能测试仪器的需求,采用先进的模块化结构形式,设计了聚合物动态流变仪测试系统的虚拟仪器。该虚拟仪器采用多线程的设计方法解决了数据通信以及数据采集、存储与处理等任务的实时性;采用OPC通信技术实现了工业控制计算机与可编程计算机控制器之间的信息交换;模块化的结构设计保证了虚拟仪器系统接口功能的可扩展性。虚拟仪器系统可以在线测量与表征高分子材料的流变行为和加工特性,实际运行表明,虚拟仪器测量精度高,重复性好,系统运行稳定可靠,取得了很好的应用效果。     

基于GPRS的冷库温度无线远程测量解决方案

本文介绍了一种新型的通过无线网络实现的计算机远程温度测量系统。该系统突破了冷库测量中传统的信息采集和传输等方面的弱点，结合移动无线传输和Internet技术，使用GPRS数据终端实现对冷库温度数据监测自动化，无线化。采用BLAND C＋＋编程建立数据库，并对数据信息进行处理，最终达到技术监督检测部门以及用户本身均可以在互联网上进行冷库数据的实时监测。     

Comprehensive three-dimensional gas chromatography with parallel factor analysis

Development of a comprehensive, three-dimensional gas chromatograph (GC3) instrument is described. The instrument utilizes two six-port diaphragm valves as the interfaces between three, in-series capillary columns housed in a standard Agilent 6890 gas chromatograph fitted with a high data acquisition rate flame ionization detector. The modulation periods for sampling column one by column two and column two by column three are set so that a minimum of three slices (more commonly four or five) are acquired by the subsequent dimension resulting in both comprehensive and quantitative data. A 26-component test mixture and quantitative standards are analyzed using the GC3 instrument. A useful methodology for three-dimensional (3D) data analysis is evaluated, based on the chemometric technique parallel factor analysis (PARAFAC). Since the GC3 instrument produces trilinear data, we are able to use this powerful chemometric technique, which is better known for the analysis of two-dimensional (2D) separations with multichannel detection (e.g., GC x GC-TOFMS) or multiple samples (or replicates) of 2D data. Using PARAFAC, we mathematically separate (deconvolute) the 3D data "volume" for overlapped analytes (i.e., ellipsoids), provided there is sufficient chromatographic resolution in each of the three separation dimensions. Additionally, PARAFAC is applied to quantify analyte standards. For the quantitative analysis, it is demonstrated that PARAFAC may provide a 10-fold improvement in the signal-to-noise ratio relative to a traditional integration method applied to the raw, baseline-corrected data. The GC3 instrument obtains a 3D peak capacity of 3500 at a chromatographic resolution of one in each separation dimension. Furthermore, PARAFAC deconvolution provides a considerable enhancement in the effective 3D peak capacity.     

High-throughput axial MALDI-TOF MS using a 2-kHz repetition rate laser

A high-throughput axial MALDI-TOF mass spectrometer utilizing a laser with a 2-kHz pulse repetition-rate was constructed and tested. This fast mass spectrometer provided a data acquisition rate 10 times faster than a commercially available (200 Hz) axial mass spectrometer, while maintaining comparable limits of detection (200 amol of Glu fib peptide). Mass resolution, only slightly less than the commercial instrument (10 000 vs 14 000), was sufficient for baseline resolution of isotopic clusters of peptides with m/z <2700. A new method of mass calibration, which combined a limited number of internal and external standards, provided the same 15 ppm mass accuracy over the entire sample plate on either instrument. Implementing the 2-kHz laser required a faster data acquisition system and high-voltage pulse electronics, together with a novel strategy for rapid sample plate movements during acquisition, to achieve a sample analysis rate of up to 2 spots/s (with 800 shots/spot). The overall performance of the fast MALDI-TOF MS instrument was demonstrated by the acquisition, in 12 min, of an LC-MS data set from a plate of 625 fractions collected during LC separation of an 16O/18O differentially labeled proteomic sample of a tryptic digest of an E. coli lysate.     

环境试验设备温湿度校准系统的研制

介绍基于MSC1200的温湿度自动校准系统。以JJF 1101-2003《环境试验设备温度、湿度校准规范》为设计依据,硬件以美国TI公司的MSC1200作为测量、信号处理以及通信核心部件,组成一套多通道高精度温湿度采集仪。按照校准规范的要求设计专用的校准软件,通过RS232接口与温湿度采集仪通信,将测量数据进行显示、绘图、存储,计算并自动生成满足要求的原始记录及校准报告,从而实现校准过程程序化、规范化、自动化,满足计量部门对环境试验设备温湿度校准的需要。     

红外静态参数测试系统中的信息采集与处理

根据红外静态参数测试系统的测试项目,提出了基于虚拟仪器的信息采集与处理系统的设计,并对软件结构笔编程进行了较为详细的说明。     

Microprocessor in Biomedical Instrumentation

Present and future trends of microprocessor applications in biomedical instrumentation are discussed, with emphasis on data acquisition. Their expanding role in laboratory and hospital instrumentation is described with a few application examples. A few microprocessor-based instrument architectures for data acquisition are discussed. The advantages and tradeoffs involved in their use in biomedical instrumentation are discussed.     

LabVIEW和PCI-4472的虚拟测试仪器的研制

文章介绍了基于PCI-4472数据采集卡和LabVIEW图形化编程语言组成虚拟仪器测试系统的硬件和软件以及仪器的功能特点，实现了数据采集、测试的控制与实时显示、数据存储与分析等功能，提高了测试的精度。