2021-2022收藏的精品资料毕业论文英文翻译GPS实时监测.doc

《2021-2022收藏的精品资料毕业论文英文翻译GPS实时监测.doc》由会员分享，可在线阅读，更多相关《2021-2022收藏的精品资料毕业论文英文翻译GPS实时监测.doc（14页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、GPS Real-Time Supervisory System and Application in the Construction of Face Rockfill DamHUANG Sheng xiang LIU Jingnan ZENG HuaienABSTRACT According to the quality control needs of filling construction of the face rockfill dam, by means o f the global satellite positioning technology , the wireless

2、data communication 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

3、compaction 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; qua

4、lity control; 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 thic

5、kness and 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 manag

6、ement mechanism 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 w

7、orld, is 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 supervising the filling construction quality quickly in ti

8、me, it is very important to develop a supervisory system of the construction quality of the roller compaction for filling engineering, which has characteristics of real-time, continuity , automation andhigh precision. T he supervisory system has a great meaning for improving the const- ruction quali

9、ty of 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 posi

10、tioning 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 t

11、o kinematics, 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

12、in every 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 req

13、uirements 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 technologyand 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 compaction in filling engineering, i. e. real-timesupervisory 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 construction quality of filling compaction for dam, road, protection dike, airport etc. and becomes an effective assistant

16、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 Composi

17、tion 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 net

18、work structureAccording to the requirements of compaction for filling and ramming enginee- ring 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 roller

19、 compaction machines and quality supervisor working 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 distance

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

21、 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 moving locat

22、ion 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, storage of

23、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, the super

24、visor 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 them for

25、 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 observationdata and known location i

26、nformation 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, consequently calculate the spatial location information of the mobile stations, whose positioning pre

27、cision can increase. T he method above is named DGPS technology. 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 between the G

28、PS 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 machines.1) Mobile

29、 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 computer, GP

30、S 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 terminals feed

31、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, bymeans of figures and tables in the system unit of drivers cab of the roller compaction machine.The o

32、perator 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 equipped exclusi

33、vely 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

34、of filling layer and calculating the compacted rate. T he supervisory car also feeds the observation results back to supervisory center. Besides, according to the system supervisory data, it conducts the locale construction from the point of riew of quality management .Mobile terminal installed in t

35、he project supervisory car and mobile terminal installed in the roller compaction machine resemble each other.1. 2 Main characteristics of the systemMain characteristics of GPS real-time supervisory system are as follows.1 ) Continuous real-time supervision. Data communication achieves bi-direct- io

36、nal transmission in a real sense. The movement tracks and velocities of the roller compaction machines can be displayed real-timely , and three dimensional location information at the sampling rate of one second can be displayed real-timely on the display screen, no matter whether it is in the super

37、visory center, on locale subsuper- visory station or in mobile terminals. The observation data of the system are cont- inuous, and the processed results at interval of one second meet enough the need of continuity of supervisory data from the system.2) High degree of automation. In the whole system,

38、 it is fully automatic that emitting the differential data of reference station to mobile terminals, feeding back the position information of terminals to supervisory center, displaying the movement track and velocities of all roller compaction machines both in the supervisory center and in the mobi

39、le terminals, storing and proceeding data and feedback analyzing , etc.3) Easy and convenient operation. The supervisory center and network relay station of the system are designed fully according to the need of full automation, and the parts operated manually mainly concentrate on mobile terminals.

40、 T he operation of the mobile terminals is very easy and convenient, which contains only several simple necessary steps such as turning on and off the unit etc. Besides, the equipment s of mobile terminal are compact , of small weight and size and its loading and unloading is also very easy.4) High

41、precision. Thank to GPS RTK technology adopted for data processing of the system and the distance between the mobile terminals of Shuibuy a project and GPS reference station does not exceed 3 km, it s horizontal precision achieves ( 1- 2) cm, which fully meets supervisory quality needs of horizontal

42、 position of the compaction construction, and can efficiently supervise the movement track, velocity and rolled times of the roller compaction machines. In regard to elevation, as long as the mobile terminals operate in a given way and rational elevation fitting model is adopted, the precision of th

43、e system also achieves ( 1-2) cm( read the analysisafterwards) , which can meet the control needs of thickness and roughness of filling layers of the compaction construction.5) All weathered 24-hours work of many mobile terminals. In the case of using 10 mobile terminals simultaneously, the system h

44、as a communication rate no less than 100 Kbps, and can support the application of point-to-point, point-to-multipoint and network relay station. The system does not suffer from the effect of weather , and meets the need of all-weathered 24-hours work of dam project .2 Key problem and solution of the

45、 system design1) Real-Time supervision of rolled parameters.Parameters of the roller compaction mainly refers to movement track, velocity, rolled times of the roller compaction machines for mobile terminals, which need real- time supervision, and can be used to control construction quality. Therefor

46、e, in order to ensure the real-time feedback of positioning data, the wireless communication data links need to achieve the function of point-to-multipoint and bi-directional high communication rate. The optimal design for solving the problem is to choose the mode of radio or GSM mobile phone. Takin

47、g account of the economy and practice- ability, the system adopts wireless frequency augmented communication technology , achieves transmitting GPS differential data of the reference station real-timely to each mobile terminal, feeding back the three dimensional spatial location information of each

48、mobile terminal real-timely to supervisory center and supporting position results at interval of one second. T his way,not only the system of each roller compaction machine can reflect its own status o f compaction.Real-timely on the display screen, but also the supervisory center and locale sub-sup

49、ervisory station can supervise the working status of each mobile terminal real-timely.2) Precision of observation data. The precision of GPS RTK is cm-level in general, considering that the distance between the mobile terminals of Shuibuya project and GPS reference station does not exceed 3 km, its horizontal positioning precision fully meets calculation precision needs of the movement track, velocity and rolled times of the roller compaction machines. In order to e