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1.
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.  相似文献   

2.
《保鲜与加工》2000,(2):20-22
The bi-directional Hybrid Fiber/Coaxial (HFC), which has almost 1GHz frequency bandwidth to transmit information, is the best access mode except Fiber to the Home (FTTH). Initial experiences indicate that real-world HFC networks are susceptible to a variety of radio-frequency impairments that significantly reduce the benefits of using high-speed cable modems. In this paper, the performance of data services in the TCP sub-layer of a HFC network is discussed and an agent server is used to enhance the performance of remote data transmission.[WT5HZ]  相似文献   

3.
WinSock is a group of API,which is used to transmit data and exchange information on Internet,the Socket Application programme impoldered by users may communicate with other Socket Application programes by Internet. Delphi provides Socket components,which sustains the TCP/IP protocol and makes the Internet programming acquiring much more flexibility.This paper probes that how to realize transmission of files in any format under nonblocking mode between clients and servers by means of Socket components of Delphi.  相似文献   

4.
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.  相似文献   

5.
The damage of bridge cable directly hazards the normal use of bridge and the safety of people. The paper discussed the signal acquisition and detection system which takes embedded DSP processor as core technology, combined with CCD, video decode chip, SDRAM, FLASH ROM, and established the fast measuring algorithm of the surface corrosion and damage, which includes deteminating the processing region, improving medium filter, sobel edge detection and dynamic threshold segment, close operation of morphology, computing defect area and saving. The experimental resuits show that this method implemented the real-time, non-contact and intelligence detecting of cable surface defect and gives the specifications of the system.  相似文献   

6.
Automatic mechanical transmission (AMT) bed testing is one of the important jobs for AMT researching and development. Through bed testing we can finish many works such as testing performance of AMT, AMT-engine matching, optimizing control rules and so on. AMT testing bed is built up base on the sample AMT developed by ourselves. Data are transmitted between PC and SCM though RS232 COM. By this way electronic throttle, clutch and shifting are controlled. Hardware port can be read in Windows 2000 by calling the unpublicized functions. Testing-controlling Program is also developed and AMT bed testing can be carried out with advanced test and control technology.  相似文献   

7.
A video Monitor &Control system of tunnel based on DSP/BIOS is proposed,which is different from traditional video Monitor & Control system.It uses DSP to process image,and uses enhanced video input processor to qcquire image.This system satisfies all requirements of video supervision,and is a low cost system.It has a good application foreground.The system has been confirmed as a good veracity and practicability system through testing in the Zhongliang Mountain tunnel of Chongqing.  相似文献   

8.
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.  相似文献   

9.
渔业生产大数据是在养殖、捕捞、加工、流通、管理等活动中产生的原始性数据,对提升渔业科技创新能力、推动渔业转型升级、促进渔业绿色高质量发展具有重要的引导作用和使用价值。本研究以中国渔业高质量发展为根本出发点,分析渔业生产大数据中心的特点与应用需求,提出涵盖数据采集、传输、存储、应用全链条的渔业生产大数据中心体系架构,围绕渔业生产大数据采集监测网、资源调度分中心和数据主中心制定渔业生产大数据中心建设的总体方案,并基于大数据应用视角,明确渔业生产大数据中心建设的总体目标、标准体系、规划布局与实施路径。研究表明,建设由水产养殖监测网、海洋捕捞监测网、加工流通监测网、水产养殖分中心、海洋捕捞分中心、加工流通分中心、市场监测分中心、管理服务分中心及渔业生产大数据主中心构成的分布式工程体系,形成渔业生产过程动态监测与态势感知能力,对提升我国渔业生产与管理水平、加快数据融合应用、实现渔业创新高质量发展具有重要意义,可为进一步具体开展渔业生产大数据中心建设提供设计蓝图。  相似文献   

10.
Digitalization of TV program becomes the trend. It is possible to provide broadband data service through DVB. The specifications about data broadcast of DVB are outlined in this paper. A detailed theoretical analysis is made on data carousels applied to data push-casting, and the software flow chart of the composition of MPEG-2 transport stream is also given. Data push-casting can provide better service than Internet for the local subscribers, and it is a good method to resolve the problems such as high cost, low speed of accessing Internet, and great investment of reforming HFC networks.  相似文献   

11.
万君  粱益同 《中国农学通报》2014,30(29):294-300
为准确获取水稻种植面积,提高遥感监测精度,利用环境卫星数据,在农作物掩膜的基础上,结合野外实测地物光谱确定端元组分,采用线性光谱混合模型提取湖北省监利县中稻种植面积,将其结果分别与统计数据和实地调查数据相比较。结果表明:采用确定端元选取的方法是可行的,其混合像元分解方法提取作物面积总量精度为93.68%;样本精度为83.67%。因此,利用HJ卫星影像数据开展平原地区水稻遥感监测可为政府决策部门提供信息服务。  相似文献   

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