High Speed Multi-channel Data Acquisition System and Storage System Based on PCI Bus

The paper first introduces principium and the developing actuality of data acquisition system about ICT.The authors then discuss PCI protocol and structure,function and work principle of the PCI bus controller S5933.Base on these,with the circuit design tools such as MAX+PLUSII,PROTEL 99SE and VHDL,etc.,the two types of high speed multi-channel data acquisition system based on PCI bus have been designed by using PASS-THRU channel and FIFO channel of S5933.     

Multichannel Acquisition System for Physiological Signals Based on PC/104

The acquisition of physiological signals is the first step of its analysis and processing. The development mode for PC/104 module is introduced and the design of multichannel acquisition system for physiological signals based on PC/104 is also put forward. The system hardware mainly includes PC/104 embedded computer,DIAMOND-MM-16-AT acquisition card and four-channel amplifiers. Windows 2000 is used as operating system for PC/104 embedded computer. The multithread program to sample data is made by means of programming language Visual C++ 6.0. The experimental results show that the system can be applied to sample, analyse, and process the physiological signals. The system also has lots of advantages, such as small volume, low power, firm structure and steady performance.     

Development of Data Acquisition and Processing System Based on DSP and USB 2.0

The data acquisition and processing system are proceeding towards faster, more powerful, easier to use and more cost effectiveness. This paper discuss the design of the high speed and convenient data acquisition and processing system based on DSP and USB 2.0, and expatiates the principle and method of the virtual instruments system in detail. The system employs an ADS8346 to sample the six channel signals simultaneously with a resolution of 16-bit.It utilizes EZ-USB FX2 as the USB2.0 interface, which can achieve the high speed communication between the host and the system. It uses TMS320VC33 (dsp) as the core chip, which can accomplish the function of the main control and real-time digital signal processing. The system enhances the virtual instruments' advantage more by the combination between software and hardware.     

Design of Testing System for ABS Test-bed

This paper discusses the structure, design and key techniques of testing system, and expounds the design and development of hardware and software based on virtual instrument technology. The design of hardware includes signal conditioning module and data acquisition module. The design of software includes interface program and upper layer program. Combining the hardware and software effectively, a testing system for ABS test-bed is set up, which has multifunctions of developing, debugging, inspecting and performance valuing to ABS. Having crucial meaning in engineering, the development of this testing system will make ABS tested in the lab mainly, thus improve the security and make the test more economical.     

Auto gain control design in vibration acquire system

Aiming at the problem that the gain amplitude is hard to identify in advance and the gain value can not be set properly, an auto gain control (AGC) strategy using Kalman filter is presented to deal with the uncertainty in vibration acquire system. The design principles, algorithms and circuit implementation are described. The experimental results show that this method can not only control auto gain in dynamic data acquiring system, but also get wide gain amplitude range without setting the initial value. It has important practical application value in high dynamic range data acquisition.     

Development of Measurement and Control System of Engine Test-bed Experiment for Motorcycle

Engine test-bed experiments are the main means of engine performance test, whose necessary developing trend is to apply measurement and monitoring system based on the computer. This paper introduces alteration for engine test-bed experiment system. By adopting data acquisition system, using web and ftp technique, computer-controlling and remote monitoring in real-time are realized. And the details of singlechip are mainly discussed based on data acquisition system, testing-software, web and ftp technique. The improved system realizes automation of engine test-bed experiment and data processing. It can save time and manpower, increase the productivity and improve the working condition. Especially the interface of system software developed by Delphi under Windows is simple, clear and easily dealt. The practical application proves that the new system has good value for engineering.     

Great Capacity of Data Logger Based on Virtual Instrument Technology

The Data Logger is an important secondary-instrument,which can be applied to automatic monitor and control system,and high speed local data acquisition for later analysis.The Virtual Great Capacity of Data Logger based on virtual instrument technology is a new instrument which has more advantages than the traditional Data Logger.The design method has been introduced from three ways,which includes system principle, hardware configuration and programming design, and an application example is given.This Data Logger is low cost,easy to take,also easy to operate.It can be widely used in many of actual applications.     

Real-time Infrared Image Acquisitionand Processing System Based on PCI Bus

In the system of infrared imaging acquisition, it is necessary to improve data transfer to satisfy the characteristics of high speed and real time. So,this paper introduces PCI bus and PCI inerface to imaging acquisition. The protocol of data transfer of PCI local bus and the structure of PCI9050 are studied in detail, and the IRFPA data acquisition system are described based on the protocol of data transfer of PCI local bus. The system adopts frame buffer to make slow transmission between peripheral circuit and PCI bus.CPLD is also used as a master of logic time control?     

Electro-circuit Design About the Data Acquisition and Wireless Transmission System Based on High-speed SCM

Considering the difficult of acquiring and transmission the signal from the moving equipment, a new fault diagnosis monitoring system is presented. The system acquires the state signal from the moving equipment by data acquisition module that based in W77E58 high-speed SCM, and transmits the data fast by wireless mode. The signal data can be use for fault diagnosis and precise analysis. The system has the ability for acquiring abundance of data with a high speed, the ability for high accuracy data conversion, and has a function of programme controlling gain and programme controlling low-pass filtering. The successful application of this system on the vibration monitor about the material-transporting bogie in an iron works of a domestic steel enterprise proves the stability and credibility about the design project, also testifies its practical value and versatility.     

基于LabVIEW的潜油电泵数据采集系统

应用LabVIEW虚拟仪器现场可编程门阵列(FPGA)对潜油电泵的电压、电流参量进行实时数据采集,通过上位机对采样数据进行分析处理,得到潜油电泵的视在功率、有功功率、无功功率和功率因数,并与电能质量检测仪检测数据进行对照。系统硬件采用NI sbRIO-9606和NI9683夹层板配合使用,突破了传统的依靠DAQ助手的硬件采集,基于现场可编程门阵列(FPGA)的数据采集系统,由软件构成采集功能芯片,可控性强,准确性高,应用性好。实验表明,该系统在误差允许范围内能够对数据进行准确采集。     

An electromagnetic interference design of a high speed image acquisition system on DM642

A novel design is presented to defend against electromagnetic interference (EMI) in a high speed data acquisition system. Problems that affect signal integrity (SI) in high speed image acquisition systems, such as reflection, crosstalk and ground bounce, are deeply analyzed in a manner consistent with transmission line theory. The results can theoretically inform EMI design of important networks, including system power, ground, clocks, high speed wires and decoupling capacitors. Experiments simulating print circuit board(PCB) reflection and EMI on high speed signal wires between DM642 and SDRAM are conducted. The power and ground should be placed separately in different layers. The clock lines passing through holes should be as few as possible. The signal lines should be as close to the same length as possible. The results show that amplitude of the signal overshoot is less than 0.7 V and the EMI amplitude is within the federal communications commission(FCC) standard.     

Portable Data Acquisition Instrument Based on MSP430F149 Micro Controller

This paper introduces the portable data acquisition system based on MSP430F149 micro controller. In this system, PGA chip MCP6s28 is applied to reduce the quantity of devices and power dissipation of the system. Real-time transmission is implemented by the wireless data transceiver. Large memory capacity make it convenient for field operation. The system realizes the menu management by using the graphic LCD. It has the features of small size,low power dissipation, high conversion rate.Therefore,the system is suitable to use dry battery and work in confined space.     

Detecting System of the Dielectric Loss in Capacitive Equipment Based on Virtual Instruments

A digital detecting system of the dielectric loss in the capacitive equipment is introduced based on virtual instruments.This system can real-time collect,analyze,process and storage electrical signals with National Instruments' program LabVIEW and ADLINK,s DAQ board.Through the simulation test in lab and the real test in electric substation,it is shown that this system has high accuracy on testing the dielectric loss in the capacitive equipment,the real test data is stable and the relative error of real dielectric loss is less than 5%.It is to say that this system can meet the requirement of the real on-line monitoring.     

利用籼稻资源中的“隐蔽有利基因”提高粳稻苗期耐冷性

苗期低温是制约东北水稻生产的一个重要逆境因子,培育苗期耐低温的水稻品种是解决这一问题最有效的途径之一。以粳型恢复系C418为轮回亲本与7个来自不同地域的供体杂交和回交培育BC₂F₂群体，利用沈阳春季田间自然低温进行耐冷筛选，并对入选的177个苗期耐冷导入系后代在自然和人工气候室两种不同强度的低温胁迫条件下的苗期表现进行评价。结果表明，虽然供体亲本均为苗期耐冷性弱的品种，但在全部回交后代中均出现耐冷的超亲分离，表明这些供体亲本均携带对耐冷性有利的“隐蔽基因”, 不过组合间的耐冷性选择效率存在较大差异。以人工气候室低温胁迫后的存活率为耐冷性鉴定指标，导入系之间出现广泛分离，田间筛选入选比例高的BG300和中413导入系群体中出现存活率高的导入系后代比例较其它群体高，说明在同一轮回亲本遗传背景下回交后代的耐冷水平取决于供体。在室内严格低温条件下表现为强耐冷性的导入系在相对温和的自然低温胁迫下表现为苗高、苗干重较非胁迫条件生长抑制不明显，且能够促进根系生长。结果表明，大量的耐冷有利基因以“隐蔽”的形式存于水稻种质资源中。通过利用来源广泛的种质资源作为供体进行回交育种，对回交后代进行严格耐冷筛选，可有效选育高产耐冷水稻品种和有价值的育种材料。     

基于ZigBee技术的物流仓库温湿度监控系统设计

针对电商快速发展导致物流交易量增加,从而给仓库存储带来较高成本的问题,提出了一种基于ZigBee技术的物流仓库温湿度监控系统设计。本文结合快速发展的无线传感器网络技术,对物流仓库的温度和湿度状态进行监测,并通过ZigBee技术将传感器数据传输至汇聚节点和嵌入式网关设备,并由嵌入式网关设备将数据转发至监控中心,同时监控中心可以根据仓库状态自动开启相关控温和控湿设备。经实际运行验证,本系统可以实现数据自动化采集、传输和显示温湿度,所设计的系统可以有效提升物流企业的仓库状态监控效率,达到智能化管理要求。     

Design of Data Acquisition System for Vehicle Based on CAN Bus

To the question that a meter is correspond with a set of lead and a sensor,this paper presents a design of data acquisition system for vehicle based on CAN bus.In this way,the combinatorial instrument is only connected by a bus unit.Author introduces the data acquisition structure chart and the CAN interface,analyzes the software by program flow chart,and shows it's application for vehicle virtual instrument.A method of calculating vehicle speed,engine rotate speed and the course of development mileage are also given.     

A NEW COMPUTER DATA ACQUISITION AND COMMUNICATION SYSTEM FOR ENVIRONMENT PROTECTION FIELD

A new computer data acquisition and communication system is proposed in this paper. The system has the following charatcrjstics: the master station has the double functions of monitoring and controllng the slave stations. The system has low bit erro rrate of data communication, high catch rate of data acquisition and the strong operational reliability. The two years practical operation has proved that the system proposed is effective for the environment-protection field.     

棉花不同生育期棉蚜危害损失及防治指标的研究

1980—1986年,通过田间试验,研究了棉蚜对棉花的危害损失,平均单株蚜量(x)与籽棉产量损失率(y)的关系:出苗至3片真叶期为y=-38,574+11.645Inx;4—6片真叶期为y=-49.633+11.232lnx;成株期(伏蚜)为y=-28.802+5.465lnx.在经济允许损失为1%左右时,三个生育期的棉蚜防治指标分别为平均每株30—50头,每株80头左右,和每株(3片叶)200头左右.经生产示范,执行本指标可减少药剂防治2—3次,有明显的经济效益和生态效益.     

Study on Single-chip Computer Control Systems in Miniature Water Works

In order to enhance automation and to design low price and performance reliable control systems for the miniature water works, the single-chip computer control system was adopted to control the work. The single chip computer control system in the miniature water works, the principle of the hardware and a part of software block diagram were discussed in this paper. Finally, the data acquisition and control network were introduced.     

不同保鲜剂对哈密瓜采后病原菌抑制性研究

保鲜剂BG1,BG2,Azoxystrobin,Amistar均为瓜类抑菌性保鲜剂,通过这四种不同保鲜剂对哈密瓜采后病原菌抑制效果研究,探索出能控制哈密瓜采后病害的适应性好及效果明显的保鲜剂,以便在哈密瓜生产和经营中推广应用,减少哈密瓜采后运输、贮藏保鲜过程中的损失,提高哈密瓜生产和经营的社会效益及经济效益。经过两年的试验研究结果表明：BG1对青霉属（Penicillium sp.）、交链孢属（Alternaria sp.）、根霉属（Rhizopus sp.）都有较强抑制作用;BG2对交链孢属（Alternaria sp.）抑制作用强;Azoxystrobin对青霉属（Penicillium sp.）抑制作用强;Amistar对根霉属（Rhizopus sp.）抑制作用强。