基于Labview的多通道数据采集系统设计

围绕多通道数据采集系统,提出了基于Labview的多通道数据采集系统设计,该采集系统主要由硬件系统和Labview软件系统组成。硬件系统主要介绍了调理电路与数据采集卡选型;软件系统重点介绍了数据采集、滤波与存储,通道波形回放,模拟信号输出三个模块的Labview程序设计。所设计的系统能够为各种现场的多通道数据采集系统提供一定的指导作用与实践参考。     

实验室环境温湿度无线监测系统设计

为了实现实验室试验环境温湿度的实时监测、多点无线测量、自动记录等功能,设计了一种实验室温湿度无线监测系统,并介绍了该系统的工作原理和硬件结构,分析了软件流程。该系统由无线单片机芯片CC1110和温湿度传感器SHT11构成数据采集端和发送模块;由CC1110、FLASH存储器、液晶显示、串行接口等电路构成数据接收模块,并与计算机连接。计算机监控程序负责处理接收模块传来的数据,并将其存储到数据库SQL Sever;通过监控画面显示实时数据和随时间变化的趋势曲线;检测员可通过计算机监控程序随时调用环境温湿度历史数据。经过实际应用证明,该系统性能良好,具有稳定、精度高、操作方便等特点。     

基于PXI和LabVIEW的双板卡远程数据采集系统设计

介绍了一种基于PXI总线及LabVIEW平台的数据采集系统设计方法,该系统可实现双板卡协同工作下的多通道数据采集,并通过TCP技术实现远程数据传送,并能够进行数据的存储和回放。该系统已成功应用于转子实验台动平衡的测试工作。     

基于Zigbee和GPRS的电梯制动器实时监测系统

电梯是人们生活中的一种便捷工具,电梯制动器是电梯的主要安全装置,对电梯制动器进行实时监测非常重要。设计了一种基于Zigbee无线传感器网络和GPRS技术的实时监测系统。该系统通过布置在电梯制动器上的多个传感器节点进行数据采集,通过Zigbee网络传送给中心节点进行存储和处理,使用GPRS无线通信模块将处理好的数据传送给监控中心,达到实时监测的目的。     

智能仪器实验教学系统开发

开发了一套智能仪器实验教学系统,该实验系统由数据采集系统和以SST89V564RD单片机为核心的数据分析处理系统组成.整个系统采用模块化设计,包括单片机模块、人机接口模块、数据采集模块、简易信号源模块等.信号源由系统自带的信号源提供,也可外接信号源.数据采集模块通过串口采集数据,经由单片机编写的数据处理程序进行分析处理,由上位机软件显示原始数据波形或处理后数据波形.实验证明,该系统运行稳定,可满足智能仪器实验的教学目的.     

云计算视域下计算机网络安全存储系统设计

以实现云计算环境下计算机网络数据存储的安全性、完整性为目标,文章提出了一种崭新的计算机网络安全存储系统设计方案.系统基于多Agent代理层次设计数据采集模块,采集用户发送的数据信息;数据经过身份认证模块验证后在安全检测模块判别其安全水平,低于信任度阈值的数据视为风险数据;在数据加密模块按照云存储安全模型对无风险数据进行加密处理.测试显示,系统检测风险数据误差为0,系统安全存储数据时的CPU占用率与时间响应均较低,展现了良好的数据存储性能.     

基于烟气分析仪的数据采集与处理系统设计

为了实现工业锅炉运行经济性的在线监测与分析,便于生产运行人员及时了解和调整锅炉的运行状况,设计了一种基于烟气分析仪的数据采集与处理系统。该系统可以实时准确地采集数据,并实现数据显示、存储、远程通信等功能,解决了人工离线录入数据的难题,为性能优化分析、指导运行优化操作提供了便利。现场调试结果验证了该系统设计的合理性和有效性。     

基于CAN总线和SD卡存储器的高速数据采集系统的设计

开发了一套基于CAN总线和SD卡的高速数据采集系统。硬件系统主要由信号调理模块、A/D转换模块、MEGA处理器模块、CAN通信模块组成。它能够实现信号的采集及前端处理,并能通过CAN总线与SD卡通信,实现对数据的存储、后端处理及显示重点阐述了系统原理及硬件、软件的设计。     

分布式井-地电位梯度无线接收系统的设计

为了满足井地电法勘探中高分辨率勘探、地形复杂地区勘探和大范围勘探的需求,研制出一种分布式井-地电位梯度无线接收系统。该系统采用31位Δ-Σ型ADC实现了高分辨率数据采集;利用GPS同步技术实现了多通道数据的同步采集;通过STM32微处理、Zig Bee无线技术和SD卡联用实现数据接收系统的工作流程控制,数据预处理和存储。试验结果表明:该系统的均方根噪声为0.5μV,动态范围为140 d B;可准确探测出异常体,能够满足井-地电位梯度数据采集的需求。     

单片机和LabVIEW的多数据无线监测系统设计

在当今的生产与生活中,数据参数对监控生产设备的运行状态有很重要的作用,其中温湿度、电压电流及PM2.5数据监测在工业生产和民用生活中尤为重要,针对传统有线监测方式功能的不足,设计一种基于单片机和LabVIEW的无线多数据监测系统。该系统采用四路温湿度、一路电压电流及一路PM2.5传感器进行数据采集,通过NRF24L01无线通信模块对数据进行传输,利用LabVIEW虚拟仪器软件作为开发平台构建多路数据监测界面。系统具有对各路数据进行采集、无线传输、显示、存储、报警等功能。结果表明,该系统能有效准确的反映多数据的变化,人机界面友好,测量精准,也便于功能扩展升级,具有一定的实用推广价值。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.