外文翻譯基于GPSGPRSGIS和互聯(lián)網(wǎng)的車輛定位系統(tǒng)

1、 英文文獻(xiàn)原文Based on the GPS, GPRS, GIS and Internet vehicle positioning systemAbstractThis paper introduces an integrated geographic information system (GIS), combined with the application of global positioning system ( GPS ), general packet radio service (GPRS) and Internet vehicle positioning system.

2、For a need to study and management of vehicle positioning of the enterprise, choose a suitable vehicle positioning system is very important. The main feature of the system is the use of open geographic information system platform to access to resources, using the Internet based user interface, reali

3、zation of vehicle positioning information update. The system consists of GPS based positioning device of the vehicle, communication server, web server, database server and desktop map composition. Positioning device installed in the vehicle interior, through the GPS position to collect real-time inf

4、ormation, the information is transmitted to a central database through GPRS. The user can through the Internet in real-time show the location of each vehicle, and then for all vehicles management. Vehicle position and other related information will be displayed in the desktop map generated by an ele

5、ctronic map. This system is the use of information and communication technology combined with each other and form. The sharp rise in fuel prices, this system was successfully used on a company's resources for effective management of great help.Key words: the global positioning system(GPS), gener

6、al packet radio service(GPRS), vehicle positioning, desktop map, Internet, information communication technology.1、Introduction：This vehicle positioning system the integrated use of modern information technology and communication technology, applied to have more vehicles enterprises, enterprises can

7、use this system for vehicle tracking and management.This system consists of vehicle tracking device, the central server system and Internet. Through this system, users can use their computer control desktop map, and then understand the geographic location of the vehicle and other relevant informatio

8、n.This paper focuses on the design and development of vehicle positioning system in the. However, this system has a lot of other units, including the management of system resources (drivers, vehicles ), and efficient use of (vehicle allocation problem ) and report generation and audit activities suc

9、h as part of.The system is designed to serve a large fleet of vehicles or complex requirements of the use of enterprise. Workers may need frequent use of short trips, as well as some long-distance travel. Some may visit a short period of time can be determined, and some travel may need to match the

10、corresponding daily schedule. Employees may sometimes require extended trips or a parking lot, but the vehicle repair often meet temporary needs. These issues require a more effective vehicle positioning system to solve, in order to meet the above requirements, need a diversification strategy. In or

11、der to improve the company overall productivity, must on all vehicle centralized management.This paper uses a variety of techniques to achieve this goal. The following example shows: we can take a variety of science and technology are combined to solve a real problem.2 GPS and GPRS definition2.1 GPS

12、GPS English called Global Position System, through a simple translation we will be:" the global positioning satellite system" this results. In the nineteen fifties years, Americans for 30 years, spent $about 30000000000, the construction of such a brilliant and huge system, can be said to

13、be a brilliant history of space flight.Figure1 GPS navigation satelliteBuilt at the beginning of the global positioning system GPS inspiration was born in meridian instrument satellite navigation system, and radial navigation system cannot display the fixed-point elevation, position accuracy and the

14、 positioning time unsatisfactory shortcomings led to the birth of GPS.This system consists of24 satellites, in 11 hours, 58divided into periodic uninterrupted around the earth, as we provide pictures, data. Although some 12000km altitude, can be insight into every corner of the earth. Therefore, at

15、first, this set of equipment is only used in military and civil fields related to important national interests, given its great value to later really used as a civilian, and completely free. Now, GPS is the product of more emerge in an endless stream, GPS mobile phone, car GPS, GPS module. Then, the

16、 latitude and longitude of the concept is also more and more be filed, so we shuttle in the earth will be more easily.2.2 GPRSGPRS Gerneral Packer Radio Service English, Chinese translation for the communication packet radio service. At present the domestic GPRS carrier is China mobile communication

17、, we often send MMS when I need it, say simply, it is a kind of infinite data transmission tool.Specifically, GPRS in the existing GSM system developed out of a new packet data bearer service. GPRS and GSM system the most fundamental difference is, GSM is a circuit switching system, and GPRS is a pa

18、cket switch system. GPRS is especially suitable for intermittent, abrupt or frequent, small amounts of data transmission, but also suitable for occasional large volume data transmission. We can understand the GSM GPRS to a higher level.Figure2 GPRS a simple caseGPRS charging methods and the traditio

19、nal GSM also has very big different, it is only by data flow charging, namely according to the user the amount of transmitted data to billing, for example, we downloaded information, not by the time online charging that is to say, as long as the transmission of the data, even if a straight" onl

20、ine", also need not pay for. Then make a" call" for example, in the use of GSM+WAP mobile phone online, like the phone started charging; and the use of GPRE+WAP online is more reasonable, as the phone does not collect fees, only dialogue to calculate costs.3、System overview3.1 The tar

21、getThe system's main purpose is to solve a large enterprise in the problem of existence, as follows:(1) The lack of a perfect system, cannot master the vehicle real time condition.(2) Employees in the work can not be timely appropriate transport, leading to the lack of productivity.(3) Due to tr

22、ansport the inefficient use of or unauthorized use, cause the decline of productivity.In order to solve the above problem, we use the system made the following attempt:(1) More easy to operate the Internet interface.(2) An accepted, already existing communications facilities use.(3) A more accepted

23、by the people reflect the geographic information to the operation of the device.(4) Open information resource tool use, reducing the cost of system.3.2 Information technology overviewAt present, there are several different forms of the locating scheme. Some are by the server to the client for unifie

24、d operation, some on each car were independent of the mode of operation. If we consider the cost factor, the client server system is a better solution. If we consider the problem of timeliness factor, independent of the mode of operating system advantage. There are other methods, such as strengtheni

25、ng the geographic information application, this applies to client server environment, this software upgrades can be in client server operation. For independent mode, if the geographic information needs to be improved, it will need to link each of the software upgrade.At present, there are several di

26、fferent forms of the locating scheme. Some are by the server to the client for unified operation, some on each car were independent of the mode of operation. If we consider the cost factor, the client server system is a better solution. If we consider the problem of timeliness factor, independent of

27、 the mode of operating system advantage. There are other methods, such as strengthening the geographic information application, this applies to client server environment, this software upgrades can be in client server operation. For independent mode, if the geographic information needs to be improve

28、d, it will need to link each of the software upgrade.3.3 System architectureThe vehicle positioning system considering the constraints and restrictions, based on the Internet provides a solution. The system described here architecture is mentioned above client server system architecture, the client

29、here refers to the web browser. In this architecture, the Web server, communication server, database server and desktop map together, play a role in. In order to make the lowest cost, the system selects the open platform resources to serve the desktop map.This system uses general packet radio servic

30、e ( GPRS ) to achieve the tracking unit and client server connection. General packet radio service ( GPRS ) is a 2.5G mobile communication technology, it is omnipresent. GPRS can also be applied to a center point with its surrounding mobile data transmission between devices. Using GPRS cost depends

31、on every thousand bytes of data passed by, as the SMS information cost calculation method.Through the GPS collection of real-time location information, stored in the user has a central database. The system for each user can get information through the internet. Figure 1shows the architecture of the

32、system.Fig3 system architecture4 System designThis section describes the system hardware and software design, and the function of each component.4.1 Hardware designThe positioning system through the GPS collection positioning information, then the information system compression for a specific packet

33、 format, through the GPRS and send it to the server. If the GPRS cannot real-time application, has the time labeled packet is stored in a temporary storage unit, such as GPRS when available, are stored data packets will instantly upload. Therefore, even if a transmission failure, vehicle real-time l

34、ocation information is not lost.The positioning system by micro controller, GSM module, GPS receiver, the data storage unit and a power supply. The positioning device diagram as shown in figure 2.Fig4 Diagram of positioning deviceThe microcontroller is the main component of the positioning device. I

35、t is directly through the I/O interface with other components connected.Positioning device of vehicle GPS receiver the longitude, latitude and speed information is sent to the microcontroller. Then GSM module through a previously established GPRS server transmits the data to the microcontroller. Fir

36、st of all, the device requires the establishment of a connected with the server and general packet radio service (GPRS), then the need to build a TCP / IP protocol, the IP packet can be smoothly transfer.Positioning device adopts the design of the vehicle battery, and the battery design in the insid

37、e of the vehicle, is used as an emergency and design.In GPRS is not available, the GPS data will be stored in the temporary storage unit, once the GPRS recovery effect, these stored GPS data will immediately be sent to the server.According to some basic fault, the positioning device is equipped with

38、 several LED indicating lamp. The indicator shows the availability of GPS, GPRS availability as well as power availability.Figure 3 shows the inner structure of positioning device.Fig5 the internal structure of positioning device4.2 Software designThe system software system comprises a communication

39、 server, web server and GIS desktop map.The positioning device communication server is the most important part of it with the other components to be connected. Through the communication server establishes the TCP / IP protocol, thereby and remote hardware system linking. Communication server can be

40、connected through threads and a client connects, customize an application level protocol can be used to transfer data. The server will create an TCP interface, the application program interface connected with, and then the server receives transmitted data coming in.When a client (remote positioning

41、device ) to connect, the server will verify and confirm the client. Then the server will begin receiving the client information, and the storage server database.The Web application will retrieve database server according to the requirements of users within the data, and data pretreatment. The Web ap

42、plication is the system of main management tools, the user through the application log on to the system, the program according to the user of the different modules of the request, to verify a user's identity.5 Geographic spatial information application5.1 Related geographic information component

43、The system of geographic data module collects all the relevant spatial geographic information. Geographic data module by location, geography edge, route and route or distance of travel.Locations include the city, township, including user parking lot, other landmarks.The geographical edge refers to a

44、 particular location in the surrounding region, the user can define the area around the center point and radius. The GPS system is defined by the region 's center position, and the geographical edge refers to the definition of the radius of the region. In this paper a positioning system, if a ve

45、hicle is defined in the region, it can detect the location of.Route may contain multiple sites. In a certain route to add a location, it will form a new route. By this method, the main line and the secondary line can be added to the route system to.In order to facilitate a particular car faster star

46、ting from the destination, positioning system operators can be designed for the specific line. When a vehicle needs in one stroke to stay, the system operator can combine the previous route and add new stroke, so that the vehicle can be normal operation.Like a car needs from Colombo to hurry that, o

47、n the way to Lavigna to take a person. This trip is the first from the Colombo Galle trunk in Colombo - Carter Bea section sets out, via Carter Biya - philia trunk, then via Colombo Galle trunk of philia, Healy the trunk, finally reach the fountain. If a car along this route, once the tour any devia

48、tion, positioning system will immediately found and put this case in short form of information feedback to the management. The enterprise can through the use of geographic information to meet their requirements. Line selection interface as shown in figure 4.Figure6 line interfaceManagers can through

49、 geographic information module to create their own location, geography edge, route and travel data. In order to better operation and easy to observe, can use the map to determine the location, travel, route and other related data, this can be done by a by the electronic map consisting of a graphical

50、 user interface to achieve. For example, can design the electronic map cordinates, at the click of the mouse to a particular position, set a specific city will be revealed. On the system of course design is shown in figure 4.5.2 Geographic information system tools- Open Source SoftwareIn order to ma

51、ke the positioning system part of the electronic map is more perfect, the system uses a called desktop map of open source software. The geographic information system tools is a widely accepted with the standard format of the electronic map, it can be used to display on the electronic map geographic

52、information.Desktop map on the Internet showing excellent data, such as maps, image and vector data. In addition to browse the geographic information system data, the user can also through the map browser released on the Internet on the geographic location of the picture.Electronic map is saved in a

53、 SHP format, but the information in the database is saved in DBF format in the file. Database of the electronic map are at different levels in order to save the. Whenever there is a customer need to browse the data, the client application can be based on customer requirements to load the data at dif

54、ferent levels.On the positioning system of electronic positioning module, desktop map will get geographic information system data, then the data to generate electronic map. Then the server will generate JPEG format images and transmit it to the Web server, users can browse the. All of the electronic

55、 map is generated in a desktop map.In the transmission of location information at the same time, the positioning device also the speed, time and power level data is transmitted to the server, the information is also stored in the database. Positioning module according to each car. The license plate

56、number to all vehicle positioning. Each vehicle is positioned vehicle in the electronic map is displayed to a point. For every 8 seconds to refresh the browser interface, thus they can know the vehicle real-time status.The map also has a general electronic map has the functions, such as in the map a

57、 particular magnification, and reduce translation used in the module can be realized. These functions can browser through the output, then the image displayed.Figure 5shows a car positioning system within the display of information status.Fig7 vehicle positioning information display6 Conclusion and

58、ProspectThis paper introduces an integrated geographic information system (GIS), combined with the application of global positioning system (GPS), general packet radio service (GPRS) and Internet vehicle positioning system. This system is the use of information and communication technology combined

59、with each other and form. The sharp rise in fuel prices, this system was successfully used on a company's resources for effective management of great help.In the selection of support the positioning system of science and technology and the software and hardware structure, some have the same purpose platform do research. In considering the implementation and operation cost basis, the system selects application of science and tec