The automobile GPS positioning system consists of a central database and four major software modules: communication module, system data management module, GIS geographic information system, report statistics module, among which the communication module is the core part of the system and can support multiple communication methods. Access: GSM, GPRS, voice, paging, etc. This system has excellent scalability.
3.1 monitoring center network structure diagram;
3.1.1 Network structure description The monitoring center consists of a number of GIS graphic workstations, database servers, communication servers, system management workstations, voice gateway workstations, UPS power supplies, and network connection devices to form an organic network structure; through routers and external systems. Security interconnection; and through the large screen, projector and dual graphics card master computer can achieve excellent GIS information display and mobile target monitoring. The following describes the main components of the network architecture in detail:
(1) Central Server:
The central server can use INTEL or IBM high-end server, Windows 2000 Advance SERVER operating system, optional dual-system hot backup.
â—† Database server: mainly stores various communication, scheduling, alarm, system management, statistics, public information, and corresponding data, and runs large database software systems such as SQL SERVER, MY SQL, ORACLE, etc.; performed by a professional system administrator. maintain;
â—† Communication server: run communication program and network management program; complete the information sending and receiving and network monitoring functions;
â—† Backup server: backup database server data in real time through corresponding backup hardware or software to ensure data security and continuity of system operation;
(2) Each workstation:
The monitoring system temporarily sets several GIS workstations first, and the number of them can be expanded very conveniently. Through the grouping of vehicles and the authorization of user roles, flexible mobile target allocation can be achieved, and each operation is controlled and recorded by the system; each GIS workstations are software platforms supported by electronic maps, geographic information systems, and application management software for mobile objects. The graphics workstations are supported by hardware. They are responsible for positioning monitoring, historical track playback, and scheduling management of moving targets.
(3) The network equipment is responsible for forming the private network between the internal LAN and the mobile to ensure the network of the system, which is conducive to the expansion and internal security.
(4) Large screen projection equipment
As a display device, it is recommended to use a large screen projection of 1024*768.
(5) ups power:
The system backup power is in accordance with the above system architecture and monitors all-weather operation requirements required by the center. Uninterruptible power supply is not less than 4 hours. In the equipment list, configure backup power according to the number of system computers and other control equipment requirements.
4.1.2 Construction mode of branch centers For group users, there are many branch centers in the group. Each branch center needs real-time monitoring and scheduling of its own vehicles. It can use the ADSL Internet access method to access the INTERNET. The general center can also be used. To access the Internet in the same way, apply for a fixed global IP address in the general center. Since the central system uses the middleware (COM+) technology, the entire network communication and database system are in the center, and the subcenter can be regarded as a simple extension of the general center GIS workstation, and the expansion is very convenient; at the same time, another subcenter has its own ownership. Database, enjoy a more flexible branch center design solution for the total center communication resources.
4.2 The central database of the central database is the core of the entire monitoring and management system to ensure the processing of large-volume data. According to rich industry application experience, our company has designed a database architecture with excellent performance. The monitoring target type has broken through the past with the 'vehicle' as the main, enabling monitoring and management of any moving target; at the same time, through the index, keyword And the optimization of the relationship allows the database system to access the maximum amount of information with minimal physical space. At the same time, it and the software system provide support for multiple types of vehicle terminals.
The database system runs on two high-performance servers and stores the basic data of each vehicle, vehicle terminal, and user in the system, as well as historical data and operation records. It mainly stores the following data:
â—† Car station property information
â—† Vehicle registration information
â—† Internet access customers (including individual users and group users) information;
â—†User Information
â—† Location information history
â—† Center command record
â—† Automatic alarm information â—† Backup of the information routing table in the communication server 3.3 Software system 3.3.1 Communication module This part is mainly data communication function.
It can support the communication mode of DDN private line or GSM/GPRS module, and it can be compatible with many special line access protocols such as China Mobile, China Unicom, and telecommunications; the function of this part is reflected in:
â—† Supports large capacity (supports more than 200 transmissions per second)
â—† Support multi-level framework (suitable for ultra-large-scale application, city network, provincial network, national interconnection)
â—† Supports multiple access protocols (supports multiple SMSC protocols for mobile or Unicom, ISMG gateway protocol access, and currently supports over ten types)
â—† Support multiple communication channels for information transmission â—† Support perfect communication log record storage â—† Support interface hot start function, can disassemble the main module online â—† Support the cascade of similar communication gateways â—† Support multiple simultaneous heterogeneous access (DDN, PPP, VPN, ADSL, etc.)
4.3.2 System Data Management System management is implemented by specialized database management software. This software provides functions such as adding, deleting, changing, saving, querying, and printing to the system security, vehicle, and user data management.
Security Management User Management Vehicle Operation Authority Control Login Record Management Database Management System Initialization Data Set Dictionary Maintenance History Data Maintenance Database Backup and Restore Vehicle Information Management Vehicle File Management: Manage vehicle file information Service Management: Each vehicle can be customized Each service.
Consulting information management provides a graphical interface, displaying information in a tree structure for updating the content of business consulting.
Mobile terminal information management includes device manufacturers, device numbers, names, models, communication methods, and other information.
â—† User Information Management Manage user data.
â—† Customer Information Management Manage the data of network customers.
4.3.3 GIS Information System
The main function of the GIS workstation is to display in real time the position and trajectory of the monitored moving target, the query of geographic information, and the update of the map. Specifically subdivided into:
â—† Tracking and positioning: The monitoring center can track the current position, moving speed, and moving direction of the vehicle at any time. When positioning the vehicle, positioning, timing, distance, constant speed, fixed line, fixed range, fixed position, etc. can be performed. A variety of ways to monitor, with a single point of positioning, always monitoring, key tracking and monitoring functions. The vehicle monitoring status is displayed on the system interface.
â—† Simple scheduling: The scheduling of various vehicles can be realized through the text information exchange and voice communication between the vehicle and the monitoring center;
â—† Active alarm: When the vehicle is illegally hijacked or has an accident, the user can take the initiative to alert the monitoring center;
â—†Intuitive display: The monitoring center visually displays the position and trajectory of the vehicle on the electronic map;
â—† Historical records: The monitoring center can record and view the historical records of the vehicle's driving route and realize the historical trajectory replay.
â—† Information sharing: The monitoring center can provide users with vehicle monitoring information;
â—†User information: The monitoring center can check the user information of the vehicle at any time;
â—† Real-time tracking: after the vehicle alarms, it can be automatically tracked (position, direction, speed, etc.) without geographical and geographical constraints;
â—† Collaborative tracking: When the vehicle is in an alarm state, the monitoring center can report to the relevant department to notify the vehicle location information and assist in tracking;
â—† Salvage function: The monitoring center can provide road guidance, fault help and other functions to the vehicle;
â—†Monitoring The trajectory of the moving target is displayed on the map after receiving the GPS positioning information from the center. Different moving targets are matched with different colors. The current position of the moving target is displayed with a prominent mark and is matched with the moving target number, which is in the state of the map interface. The column displays the number, speed, positioning information, direction angle, and GPS time of the moving target. When the moving target trajectory is marked on the map, the vehicle status flags transmitted back to the center together with the GPS positioning information may be in different colors. (Use a small dot to indicate the trajectory of the moving target and a small icon to indicate the current position of the moving target). The center can set the time interval for monitoring the return of mobile target GPS positioning information.
â—† Software alarm This function limits the moving range of the moving target, that is, the operator draws a driving range or driving trajectory on the map for the specified moving target. The monitoring software automatically alerts when the moving target crosses the area or deviates from the trajectory.
â—† Query query of moving target position: After inputting the number of the moving target, the historical position of the moving target can be displayed on the map centrally, or the current position of the vehicle can be obtained by sending a 'request report' instruction.
Mobile target information query: After entering the number of the mobile target, the information can be retrieved from the database, including the coding of the mobile target, the affiliation unit, the user's name, the vehicle model, the main characteristics of the vehicle, and the like.
Moving target environment information query: After inputting the moving target number and setting the distance parameter, the position of another target closest to the moving target or the positions of all the targets in the specified interval can be detected.
â—† The positioning information database can be monitored and at the same time GPS positioning data can be stored in the database and the monitored time period can be used as an index, and the track can be played back when needed.
â—† Map operation Zoom in: The zoom function enlarges the layout of the map to make it easier for users to view.
Zoom out: The zoom out function enables the layout of the map to be reduced to facilitate the user's viewing needs.
Refresh map: Refresh the current map layout.
Feature query: Query the geographic target information at a certain point or within a range on the map, including target location, name, and other attribute information.
Diving: When the size of the map is larger than the browsing area, roaming is used to move (roam) the image so that the rest of the map can be seen.
Layer control: With the different scales of the graphics, display the contents of maps with different levels of detail, avoid over-screening the display of the screen and make the screen's carrying capacity tend to be reasonable; and control the appearance and concealment of each layer. .
Print map: Prints the area of ​​the map area displayed in the current window.
Display scale: The current monitoring window is displayed in the lower right corner of the monitoring window.
4.3.4 Report management system Deep Security GPS report management system provides users with classified query of vehicle operation information, and generates and prints data reports;
â—† provide timely data query;
â—†Provide report preview and print of query data 4.3.5 Vehicle and driver management system This system is a simple MIS system for vehicle and driver. According to the specific requirements of logistics companies, the corresponding functions can be realized and different information can be classified and processed. And record statistics.
The basic information includes basic information such as the license plate of the vehicle, the self-number of the vehicle, type (cards, cans, trailers, cranes, passengers), tonnage, and the name of the driver.
Detailed data includes detailed data such as vehicle length, vehicle width, authorized passengers (visitors), driver records, subordinate departments, business nature (contracted, non-contracted), commissioning date, etc., providing data support for the intelligent command and dispatch system.
Vehicle maintenance information management: Record the equipment's production period and equipment maintenance.
Vehicle insurance information management: Record the type of vehicle insurance, insurance time and other information, due reminder.
Details of the details of the installation of the central platform (omitted), relevant information, please ask the business manager.
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