GPS In The Logistics And Distribution Centers Of Operation

In recent years, along with the rapid development of the world's and China's economy, economic reform and opening to the outside world, China's logistics industry develops in a rapid speed, and there are more people involved in the work than before. With the growing line of logistics industry, logistics have become increasingly demanding. The traditional manual management tools will lead to a logistics distribution center of the lower operating efficiency. In view of this, this paper introduces the use of GPS (Global Positioning System) system to manage the logistics business ideas and learn from GPS systems, logistics center design and management of the business system.The main work of this article is to give the logistics and distribution management system as a whole as well as the design of hardware selection, design and realization of the GPS system to monitor vehicles and precision timing module. As for large quantities and large scope of the logistics, the article introduces the use of pseudo-range differential algorithm, smoothing and improve the accuracy of GPS positioning; in the GIS (geographic information system) used in the development of MapBasic, MapX, OLE Automation technology, such as comparative analysis based on OLE Automation technology to as solutions and detailed analysis of the OLE technology as well as the key point of implementation. GPS for precise positioning, in order to eliminate all aspects of the impact of the use of differential GPS positioning technology, and gives the differential GPS algorithms and implementation of the process.Vehicle Location Algorithm: This article surveillance vehicles in the GIS as a technology-based geospatial data management, so as to the Road Traffic Network coordinates for the location of road traffic data and geo-spatial characteristics of the point, line, combine to form a complete multi-level spatial database and the establishment of relevant knowledge base model. GIS technology can be used for vehicle navigation and positioning vehicle monitoring and management of scheduling, at the same time it can be used for road transport management, as well as stations, terminals and other public sector undertakings. As a traffic information tool, it's essential to improve vehicle safety and traffic efficiency. The use of GIS databases and tools for electronic map system completes a variety of functions, which include data collection and editing functions, geographic database functions, mapping functions, spatial query and spatial analysis functions, such as terrain analysis functions. In the vehicle navigation and positioning control scheduling and management, GIS is a set of urban GIS and the subject-object-oriented information in one vehicle navigation, tracking information systems, which can show all kinds of e-scale map that can quickly and reliably for vehicle drivers to provide information on a variety of inquiries, flexible, easy to choose the path of vehicles on-line traffic between any two nodes of the best line lane, and monitoring central station monitoring of vehicles in real-time tracking and scheduling management. GIS to complete the main features include: (1) electronic map display: full-screen display, zoom, rotating, dynamic markings, such as tiered display. (2) mark the current parking spaces: real-time on-board GPS positioning to receive mobile data conversion for the geographical coordinates of the screen coordinates, the error correction software, or through a variety of sensors and parking map data, real-time location of vehicles on the amendment, included in the calculation of parking spaces under the As shown in Fig. Using two parking spaces, said: absolute movement, that is, moving vehicles, fixed map; relative motion, moving map, parking spaces on the screen has a fixed location. (3) features of classification index point mark, as well as functional features. Users can choose to enter their property, use of the operating layer, classified information prompted, in response to information, in order to set the destination through the indexing function of UN demands inquiry into the facilities Index (into the park, museums, government agencies, etc.), address index, as well as telephone numbers, such as indexing functions. (4) the best path to choose, according to their own customers demand in the electronic map can be set on the road trip of Surveying and Mapping, at the same time be able to set the number of traffic routes, to determine the best path into the auxiliary decision-making routes, the shortest distance, the shortest path, to support the one-way line, cut left, and other functions. (5) provide a good interface. Tag to show different road conditions automatically display information such as the one-way street, according to the map to adjust the ratio of dynamic maps showing in detail the crossroads marked reminded, and can track the vehicle features a return visit.GPS precision timing: that is the use of GPS satellite navigation and ranging, when measured in order to constitute a global positioning system. GPS positioning is based on the basic principles of high-speed movement of the satellite known as the location of the moment date data from the use of space resection method to determine the location of test points.Hardware selection: including the main on-board unit to monitor the central part of the terminal display and selection of GPS, GPS in the selection, location selection of Trimble Navigation GPS receiver SST-type receiver, when the delegate selection GPS receiver Trimble a time-SST Receiver.System Design: the design of integrated vehicle control and precision GPS timing of the logistics management system. By the monitoring center, on-board terminals and GSM wireless network is composed of three parts. Monitoring is the core of the system as a whole, by the communications gateway, GIS monitoring system and a time server, it has completed the major kinds of information transmitted and the GPS receiver time to deal with. It includes Car Terminal, the GPS receiver unit, GSM module, on-board control unit, display, GPS antenna and the corresponding components such as sensors. GSM is the on-board network of terminals and control center for information exchange of data link. Its functions are: GPS positioning information to accurately monitor the return center; control center will monitor data to the on-board equipment.System: The main function of the software module, including the communications interface module and the graphics display module. In the results mainly on the development of management software and application in practice, made through the application of certain effects.In this paper, the results of this study will guide the management of logistics distribution center in practice to improve the efficiency of logistics and distribution management, with a certain degree of theoretical and applied value.Due to limitations of time and research, there are still some shortcomings in this paper, such as: GPS positioning, as all aspects of the impact of error, making positioning accuracy greatly reduced, though not so advanced differential GPS technology, but the ionosphere and Troposphere effect on the accuracy of GPS impact is still insufficient, this is an international issue, we need to further resolve; Another example of this system is the object of the logistics distribution center, as opposed to large-scale vehicle monitoring system, a very small geographical area, And a simple map, and also features a relatively small. If you want to develop into a universal monitoring system of large-scale, the map of the deal, in areas such as communication links are still a lot of work to do.