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.     

Study and Design on S5933 Special Chip Data Acquisition System Based on PCI Bus

The paper explains the data transfer mechanism based on the PASS-THRU channel of S5933, and gives a method to develop data acquisition system based on PCI bus, the problem of designing the PCI interface controller is avoided, saving time and cost of development production. The use of CPLD makes the stucture of the system more integrated. The 32-bit data acquisition system,the speed of data transmission is faster,the CPU resource and PCI bus resource are spared.     

PCI Bus Card and Its Applications in the Virtual Instrument

This paper analyses the PCI bus features, and introduces several developing tolls and the techniques, including PCI controller IC, driver development software and the key points of designing PCI cards with the main focus on IC S5933 and driver development software WinDriver. An example in the virtual instrument-a random signal generator, consisting of PCI card and software, is also given. DDS is realized by software, through the high transfer speed of PCI bus. The signal generator can produce sin, noise, frequency sweep and others complex waves. It can be used to adjust the wave, frequency, amplitude, phase and precision conveniently and accurately.     

Data Acquisition System of PCI Bus Interface

After having studied the PCI bus and compared the capability, it is analyzed and compared in capability and cost and complexity of some kinds of application for data acquisition system, a high speed system which composed of chip S5933 and CPLD is designed.     

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.     

Design of PCI Bus Controller Based on I/O Transmit

With the microcomputer improving and multimedia and wideband network developing. the I/O bandwidth requires more and more. The last standard bus, for example, ISA, EISA and MC can not be satisfied with the demand of the modern technology. In this case, the PCI bus appears, and become the master standard bus. Now there are two methods to realize the PCI Controller circuit, which are the special chip and the programming logic chip. The PCI system structure is introduced,and a PCI Bus Controller is Fealized based on the I/O transmit through using a Lattice1032E chip. Which has proved successful by application.     

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.     

Application for Hybrid Electric Vehicle Based on CAN Bus

The paper introduces the application of CAN bus in the Hybrid Electric Vehicle, studies the CAN bus technique and the design based on the node of CAN bus, and provides a network topology mode. The theories foundation and basis for new generation automotive are provided, which are combined to introduce the hardware constitutes and software method for the node of CAN bus.     

Virtual FFT Spectrum Analyzer Based on DSP Technology

Virtual Instrument has become an important direction of instrument development, now it has been widely used in many fields. FFT analysis is a widely used method in mechanical engineering, fault detection and many other fields. However, the traditional FFT analyzer is expensive and is not easy to upgraded. The birth of virtual FFT Spectrum Analyzer gets rid of the limit of traditional FFT analyzer, and paves the way for the application of FFT analyzer. The uses of DSP technology make the future broadened of Virtual Instrument. This article ,based on the deep study of DSP system, designs a virtual FFT Spectrum analyzer based on DSP technology. The design is new and of great practicality, which indicates the important role of Virtual Instrument in the development of instruments.     

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.     

Study and Design on Teaching Experiment Instrument of CT Data Acquisition System Based on CPLD

The purpose of developing Teaching Experiment Instrument of CT is to demonstrate the whole process of CT scanning more intuitively, thereinto the design of data acquisition system is one of the emphases in the developing of the CT system. This paper mainly introduces the design and implement of the data acquisition system of CD - 50BG, using CPLD apparatus which have the characteristic of high integration, in the design of data acquisition system to achieve the target of minishing system bulk and improving system reliability. Aiming at the data loss of CD - 50BG during acquiring data, the data acquisition system is reformatively redesigned, the data loss in the high speed data acquisition process is reduced so that the stability of transmission has been improved by using FIFO.     

基于MATLAB图像处理的大豆颗粒检测方法研究

为解决大豆单株考种过程中人力计数准确率低和数粒仪等光电方法耗时长等问题,采用计算机视觉系统及MATLAB软件开发平台代替人工大豆单株考种进行自动检测的方法。该算法采用对大豆颗粒图像进行空间滤波去除噪声及“Otsu”方法对图像进行最佳全局阈值分割处理,在对图像处理的基础上完成对大豆颗粒个数、颗粒大小两项指标的测定。以六个大豆品种周黑豆、周青豆、周豆11、周豆18、周豆22和周豆23的籽粒为试验对象,探究大豆颗粒计数、大豆颗粒大小分级两项指标的确定。实验结果表明：该算法及程序准确有效,能准确计算大豆单株颗粒个数;该算法及程序判断出的各品种大豆颗粒平均面积大小与百粒重成正相关,且决定系数为0.9141,即可得该算法及程序可准确有效的判断大豆颗粒大小。总之,基于MTALAB图像处理大豆单株颗粒检测方法的研究可相对减轻人力劳动强度及人类视觉的不足,在提高工作效率和准确度等方面有重要意义。     

ECG Signal Acquisition Instrument Based on USB 2.0

An electrocardiogram (ECG) is an essential way for diagnosing the heart disease, and the test theories and systems work well with the practice application, whereas, as new technologies and devices come forth one after another, it allow us to acquire the ECG data more conveniently, more accurately, more comprehensively. The authors discuss the design of ECG data acquisition system based on the USB 2.0 protocol, and expatiates the system principle in detail. The system employs two AD73360 to sample the standard 12-lead signal simultaneously, which has a resolution of 16-bit. They utilize EZ-USB FX-2 as the USB interface device, which can transfer the data conveniently and quickly, and also permit the configuration of multi-system controlled by just one host. Considering the DSP as a powerful tool in the field of digital signal processing, ADSP-2181 has been chosen.     

Intelligent Sound Broadcast System of Bus Based on CPLD

The traditional sound broadcast system of bus makes use of MPU. It's shortcoming is have lower dependability, at the same time the maintenance and upgrade is difficult. In order to solve these problems, an intelligent sound broadcast system of bus makes use of Complex Programmable Logic Device(CPLD) and sound chip ISD2560 is introduced, and the principle of design is analysed. Because of the ability of In System Programmability of CPLD's JTAG, and take full advantage of the resource in CPLD, this system have no use for MPU. So, the hard circuit of this system is simple, and the system is easy to debug, upgrade and has very high dependability and better practicability.     

Reconstruction on Real-time Data Platform for Production Command Dispatch System

Production command system plays a more and more important role in the modern large scale production. Being limited to realizing technology tool,there is a lot loss in information that is very valuable in the production process.Even it is not stored to the real key data information used for reflecting production sate, therefore it is very difficult to command and dispatch the production correctly. Reconstruction platform related to real-time database is discussed. Taking the background of iron steel industry,based on the analyzing the function characteristic of real-time data requirement of real-time data platform,the paper is explored to the real-time database selecting strategy and so on.     

玉米吐丝后果穗生长动态的研究

为研究玉米果穗生长发育的变化规律,探索玉米结实率和秃尖形成的原因,研究不同品种和栽培条件对玉米果穗生长动态的影响。借助现代图像处理技术对2 种结实性不同的玉米果穗生长进行动态研究,对玉米穗长、穗粗、秃尖长度、果穗的体积、穗轴的体积、穗粒的体积进行测定。结果表明：（1）玉米从吐丝开始到成熟全过程果穗的生长符合Logistic 方程模拟。（2）玉米的穗长、穗粗、穗体积、穗轴体积、穗粒体积都的动态变化都是：快速增加→缓慢增加。穗粗达到最大增长速率的时间越靠后,作物才能更有效地供给果穗养分,而使果穗直径增大。从体积动态变化可以看出,生长条件差的陕单902 在吐丝14天后,果穗体积和穗粒体积的增长明显减慢,而郑单958 仍然再平缓的增长。这表明陕单902 的结实性差,在吐丝14 天之后穗粒体积的增长的速度慢,导致了玉米秃尖形成。（3）从玉米穗粒质量、穗粒与果穗的干质量比值和穗粒与果穗体积比值的动态变化可以看出：在不同的生长条件下相同品种的增长变化趋势是一致的。在相同的品种下,生长条件好的处理干质量比值低于生长条件差的。不同的生长条件同一个品种比较,生长条件好的体积比例高于生长条件差的。（4）从穗产量和果穗性状特征值上看,陕单902 的秃尖长度显著高于郑单958。4 个不同处理的玉米穗粒体积与果穗体积的比值,郑单958 的比值高于陕单902,要提要玉米的产量并且防止秃尖性状的发生就要注重在吐丝7~14天的管理。     

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.     

A Real-time Expert System Based on Adaptive Predication of Process State

The combination of the measured real time state acquisition from the process with predictive process for the fature state is used to predicate the variable tendency for process state. This method is useful to avoid delay and enhance real time ability of the control information of the expert system. Also a described knowledge and structure of real time process state are proposed. This system can be applied to other kind of practice systems with slow time variable, uncertainty and delay.