GPS实时监控系统中英文对照外文翻译文献.docx

1、GPS实时监控系统中英文对照外文翻译文献 中英文资料对照外文翻译附录GPS Real-Time Supervisory System and Application in the Construction of Face Rockfill DamABSTRACTAccording to the quality control needs of filling construction of the face rockfill dam, by means o f the global satellite positioning technology , the wireless data com

2、munication technology, the computer technology and the data processing and analysis technology, and integrating with the roller compaction machine, the GPS real-time supervisory system is developed in this paper. It can be used to real-timely supervise the construction quality of the roller compacti

3、on for filling engineering. The composition and applied characteristics of GPS system, and the key technique problem and solution of the design are discussed. The height accuracy of GPS system is analyzed and the preliminary application is introduced.KEY WORDS ：GPS; filling construction; quality con

4、trol; integrated system; face rockfill damIntroductionAt present , in the quality management of filling construction of the face rockfill dam，the quality control method of “dual controls”is mainly adopted, of which one is manually controling the parameters of roller compaction including thickness an

5、d roughness of filling layer and rolled times and rolled speed o f compaction machines,the other is inspecting the test hole sampling manually in the area. The method play a positive role in promoting domestic development of concrete faced rockfill dam. How ever, the traditional manual management me

6、chanism cant meet the demands of mo- dern mechanized construction and schedule anymore, with increasing of scale of con- crete face rockfill dam. Concrete faced rockfill dam of Shuibuya project in Qing jiang River of Hubei Province, China,ranking first in dam height of the same type in the world, is

7、 as high as 233 m. The project has a total filling volume of 1. 6 107 m3 and more than 6105 m3 for peak filling volume of a single month, so demands much more to control the quality of filling construction of the dam. For the sake of supervise-ing the filling construction quality quickly in time, it

8、 is very important to develop a supervisory system of the construction quality of the roller compaction for fill-ing engineering, which has characteristics of real-time, continuity , automation and high precision. T he supervisory system has a great meaning for improving the const- ruction quality o

9、f Shuibuya project .As a brand-new technology of modern spatial satellites navigation and position- ing system,GPS has g radually replaced the normal optical and electrical surveying equipment in more and more fields. Since 1980s, especially after 1990s,GPS techno- logy has lead the spatial position

10、ing technology , combining with modern communi- cation technology，to a revolutionary change. The method for simultaneously determ- ineing three dimensional coordinates by GPS has changed the traditional positioning technology from land with inshore to entire ocean and outer space, from statics to ki

11、nematics, from point positioning to network difference, from afterwards processing to real-time positioning and navigation, and absolute and relative positioning prcisi- on coming to meter level, centimeter level, even submillimeter level, therefore, expands the fields of application and effect in e

12、very walk of life. The fast development and improvement of modern data communication technology, computer technology, electrical technology and the spatial positioning technology on behalf of GPS make supervision of high precision real-time continuity and automation feasible. According to the requir

13、ements o f construction quality management for roller compaction in filling engineering, by means of the global satellite positioning technology, the wireless data communication technology, the computer technology and the data processing and analysis technology,and integrating with the roller comp-

14、action machine, in 2004 Wuhan University and Qing jiang Hydroelectric Develop- ment Corp. Ltd. Jointly developed a real-time supervisory system suitable for the quality management needs of roller compact- ion in filling engineering, i. e. real-time supervisory system of filling construction quality(

15、 GPS system for short afterwards) . The system has comprehensive functions of real-time, high precision, continuity, automation etc. , so can be applied to real-time supervising construct- ion quality of filling compaction for dam, road, protection dike, airport etc. and becomes an effective assista

16、nt of ensuring the construction quality for project . Combining with engineering needs and system characteristics, the composition, key techniques and schemes of the system are discussed in this paper. The height accuracy of the system is analyzed and the preliminary application is introduced.1 Comp

17、osition and characteristics of GPS Real-time supervisory system1. 1 Composition of the systemHardware unit of the system mainly includes 3 parts as follows:1) Receiving system of GPS satellite signals;2) Wireless network data communication system;3) Computer system.Fig. 1 Illustration of the system

18、network structure According to the requirements of compaction for filling and ram- ming engineering and construction quality management to system, the system is composed of supervisory center, network relay station, locale sub-control station,GPS reference station and mobile terminals ( including ro

19、ller compaction machines and quality supervisor work- ing vehicle) , regarding the effect of wireless communication from topographic environment. Fig . 1 is the illustration of construction quality supervisory system for filling compaction project . If the topographic environment is good and the dis

20、tance between the filling construction on-the-spot and the system supervisory center is not long, the network relay station can be removed.1. 1. 1 Supervisory center Supervisory center is the heart of the system,where the differential data of GPS reference station are emitted to the GPS mobile stati

21、ons, and at the same time, receiv- es the position information fed back by the mobile stations continuously and real- timely through wireless data communication. Combining the needs of construction,electronic display screen equipped in the supervisory center can real-timely display the accurate movi

22、ng location and status information of the roller compaction machin- es as well as the quality supervisor working vehicle for compaction planes of the dam, remotely monitor the state of compaction quality of filling engineering, and offer leaders the basis of decision. T he processing , analysis, sto

23、rage of the system data and so on are carried out in the supervisory center.1. 1. 2 Locale sub-supervisory stationLocale sub-supervisory station is the extension of the system control center, and provides convenience for locale supervisor. By accessing information of the system supervisory center, t

24、he supervisor can master the status of engineering construction and the construction quality in time just in the construction locale supervisor room.Once quality deviation appears, the supervisor can tackle with the construction side on the construction locale, reminding the constructors and asking

25、them for rectifying.1. 1. 3 GPS reference stationGPS reference station is set for increasing the supervisory precision of the system by means of DGPS technology. We set a GPS receiver on a known site as a reference station and carry out GPS observation, then emit the GPS observation data and known l

26、ocation information of the reference station real-timely to the GPS mobile stations, and process the data along with mobile stations GPS observation data by means of diferential processing of carrier phases, consequen-tly calculate the spatial location information of the mobile stations, whose posit

27、ioning precision can increase. T he method above is named DGPS technol-ogy. In general, GPS reference station should be set up in the supervisory center for the sake of convenient supporting pow- er, management and maintenance. To ensure the supervisory precision, it is stressed that the distance be

28、tween the GPS reference station and the construction area must be less than 5-6 km, and the distance controlling requirement can be satisfied in practice.1. 1. 4 Mobile terminalMobile terminal includes system-requiring equipments installed in the project supervisory car and roller compaction machine

29、s.1) Mobile terminal installed in the roller compaction machine A mobile terminal installed in a roller compaction machine is mainly composed of an integrated system unit, a GPS receiver antenna and a wireless communication antenna. The system unit integrates main equipments of industrial platform c

30、omputer, GPS receiver, wireless communication and so on. Mobile terminal is mobile super- visory equipment like GPS moving station, and carries out GPS mobile observation. Its control items mainly include the rolled track, rolled speed, and rolled times of the roller compaction machines. Mobile term

31、inals feed back the effective observation result to the supervisory center continuously and real-timely. Meanwhile, the platform computer reflects the work status of the roller compaction machine real-timely, by means of figures and tables in the system unit of drivers cab of the roller compaction m

32、achine. The operator of the roller compaction machine can check out whether his or her work meets the quality requirement on the display screen.2) Mobile terminal installed in the project supervisory carProject supervisory car is the working vehicle for construction quality super- vising that is equ

33、ipped exclusively for the project supervisors.Its main tasks are carr- ying out GPS mobile observation and supervising locale quality . Its main items of observation are the thickness variations of paving layer before and after the compact- ion, supporting data for controlling the paving thickness and roughness of filling