1、附录 1 英文文献原文 Based on the GPS, GPRS, GIS and Internet vehicle positioning system Abstract This 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 s
2、ystem. 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
3、, realization 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-t
4、ime information, 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
5、 an electronic 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 companys resources for effective management of great help. Key words: the global positioning system(GPS), ge
6、neral 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, enterprise
7、s can 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 inf
8、ormation. 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 activi
9、ties such 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 m
10、atch the 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 strate
11、gy. In order 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 defini
12、tion 2.1 GPS 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 satellite Built 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
14、the 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,
15、 at 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,
16、 the 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 GPRS GPRS Gerneral Packer Radio Service English, Chinese translation for the communication packet radio service. At present the domestic GPRS carrier is China mobile communi
17、cation, 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
18、is a packet 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 case GPRS charging methods and the
19、 traditional 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
20、online, 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 overview 3.1 The target The syst
21、ems 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 transport 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.
