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.     

Application of Trap Filter of 50 Hz in Brainwave Data Acquisition System

It's always difficult in technology to eliminate power interference of 50 Hz in Brainwave Data Acquisition System .Though traditional ways to eliminate it can also gain some effects, they have drawbacks such as high cost and low currency at all time. The use of trap filter of 50 Hz may solve the question radically. Through the authors' repetitious experimentation, it is proved that trap filter of VCVS not only eliminate power interference of 50 Hz farthest but also have merits of simple circuit structure, convenient coupling and upper reliability. The authors offer collected brainwave in strong power interference environment. It may be seen that it is very clear and clean. Because power interference of (50 Hz) exists in almost all Data Acquisition System, this type of trap filter possesses better currency, it is expected to win extensive application in medical apparatus of measurement of other biological electricity signals and industrial observation and control system.     

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.     

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?     

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.     

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.     

Angular Acceleration Measurement System and Its USB Data Acquisition

The angular acceleration of a rotary shaft is one of the most important parameters for revolution which is widely employed in practical applications. The principles and approaches for measuring angular mechanism, acceleration were studied to find a feasible way to obtain the accurate and successive value of angular acceleration. A new type of data acquisition device with USB module was developed based on microcontroller AT09S8515 and USB interface controlling IC PDIUSBD12. It was convenient to test the width of rotary speed signal by using the unique function of the microcon-troller for automatically capturing the rising or falling edge of a square wave.     

Design of the PC/104 Bus Mode Multi-channel Analyzer

This paper expatiates on the bus structure and develop the bus mode Multi-Channel Analyzer (MCA). The nucleus of this MCA is the PC/104 embedded computer, and it introduces the bus communication to realize system and data communication. It may realize data collecting and showing in the field, because the bus mode is rapid. At first, on the hardware we introduce CMOS components, this reduces power, volume and weight. These make it adapts to use in the field; besides, on the software we adopt C and assembly language to program in order to improve conversion speed. At the same time, single-task DOS operating system is infroduced, which makes the software run more steadily, operate more simply. By means of testing on the spot it can normally work, so it suitable to work in the field.     

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.     

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.     

农业气象自动观测系统数据与人工观测数据对比分析

内蒙古兴安盟突泉县、扎赉特旗于2016年各安装一套农业气象自动观测系统开展春玉米、水稻发育期、植株密度、植株冠层高度、生长状况、叶面积指数和干物质重量农业气象要素自动与人工观测对比试验。通过2016至2018年的对比试验数据分析,结果表明：作物生长状况、发育期自动观测数据与人工观测数据基本一致,完全可以代替人工观测。植株密度、冠层高度、叶面积指数、干物质重量自动观测误差相对较大,不能代替人工观测。农业气象观测要素作物生长状况、发育期的自动化、数字化观测,增强了观测资料的客观性、时效性和连续性,为提高农业气象服务准确性提供了数据支撑。