Vehicle command and dispatch system

Vehicle command and dispatch system

1.                      summary

There are various types of vehicle dispatch systems, with the main function being a new type of vehicle management platform based on the Internet. It is suitable for large transportation enterprises and uses information technology to locate, track, monitor, two-way voice intercom, command, and control vehicles. It also provides complete vehicle statistical reports and powerful data analysis functions. Simplify the management of enterprise vehicles, improve processes such as internal vehicle allocation and maintenance, and significantly enhance the management level and economic benefits of the enterprise.

Build a large-scale comprehensive management and scheduling system that combines GPS and Beidou satellite dual systems for positioning, monitoring, scheduling, and management, and integrates vehicle business management systems. This project includes the construction of vehicle mounted terminal equipment and the entire central system management platform, with each vehicle supporting video image transmission function..

Adopting a dual system of Global Positioning System (GPS) and Beidou positioning system to locate, monitor and command vehicles, transmitting positioning and tracking information through GPRS data channel and facilitating communication between both parties, it can supervise various types of vehicles in the local area.

According to the functions of data collection, data communication, and business processing, the system is mainly divided into the following three parts:

1) Vehicle terminal part: including GPS and Beidou receivers and corresponding antennas, GSM/GPRS modules, control units, alarm buttons, etc. Responsible for receiving and reporting GPS positioning information, alarms, requests for assistance, etc;

2) Wireless communication link: responsible for data transmission between the vehicle terminal and the monitoring center, including the transmission of vehicle positioning/automatic alarm information and control instructions from the monitoring center. This section mainly covers GSM/GPRS, and wherever GSM/GPRS can cover, the system can operate stably;

3) Monitoring and dispatching center system: The monitoring center tracks the entire system's "nerve center" throughout the process.

2.                      System functional requirements and demands

1) Establish a vehicle management and scheduling system with centralized management, distributed monitoring, and scheduling;

2) The vehicle intelligent monitoring and management system project adopts a hierarchical management architecture, where users manage corresponding onboard terminals according to different hierarchical permissions;

3) The system platform should have automatic connection function, and all devices connected to this monitoring system should be able to automatically connect to the monitoring system and work normally. The system must have reliable security mechanisms, and important servers should have dual machine hot backup mechanisms and automatic load balancing mechanisms; The monitoring client software should have a good operating interface and multiple auxiliary interfaces such as information windows;

4) Support Google Maps and self-developed map functions;

5) Support dual system positioning function of GPS global positioning system and Beidou positioning system;

6) The system supports remote monitoring of the internal sound of vehicles and can achieve two-way voice intercom to send voice instructions to the vehicle at any time;

7) The database adopts large databases such as SQL Server or Oracle, and the system platform relies on components to implement various functions of the vehicle intelligent monitoring and management system project monitoring and management platform;

8) The design of system platform software must be built according to basic network management requirements such as practicality, compatibility, flexibility, and reliability;

9) The system platform should have strong scalability, able to expand the hardware and modules of the platform as the number of onboard terminal devices increases, and have the technical foundation to implement server clusters;

10) Vehicle terminal devices should have compatibility and be able to display, control, query, and remotely manage positioning information using multiple positioning methods;

11) The system platform supports data and image collection, statistics, storage, and distribution;

12) Multiple users can simultaneously monitor any information from the same onboard terminal, with higher-level users having priority control;

13) There is a powerful multi-user concurrent processing mechanism to meet the concurrent use and shared access to resources of various functional departments.

3.                      Main functions and structure

u       System composition structure

This vehicle intelligent monitoring and management system project adopts a hierarchical management architecture, where users manage corresponding onboard terminals according to different hierarchical permissions.

1) Characteristics of using B/S structure system

Google Maps is selected as the map, and its map needs to be bound with Google ID using the domain name. All positioning information is presented in Google Maps, which is mainly used for Internet remote management. The system can be used at any time and anywhere on the Internet, without downloading and installing any software. Support cross regional, multi branch, and multi branch business management.

2) Characteristics of using C/S structure system

The C/S structure is mainly used for secure vehicle management within the local area network. The map adopts MAPINFO offline map, which can be freely edited and defined for a certain area to meet the needs of users. The C/S structure system is mainly used for viewing and controlling vehicles through client login within the local area network.

u       Monitoring and Dispatch Center Software System

This monitoring management and scheduling system consists of a central database and five major software modules, namely: communication module, recording and monitoring module, management module, vehicle monitoring and scheduling system, and GIS geographic information system. This system has excellent scalability.

u       Central database

The central database is the core of the entire monitoring and management system, implemented using a large database to ensure the processing of high traffic data.

The database system needs to be equipped with a high-performance server, which mainly stores the basic information of each vehicle, onboard terminal, and user in the system, as well as historical data, operation records, etc. It mainly stores the following data:

Vehicle mounted station attribute information

User Information

Vehicle registration information

Information of registered customers (including individual and group users);

Location information history record

Central command record

Automatic alarm information

Backup of information routing table in communication server

4.                      software system

u       communication module

This part is mainly for data communication and network management functions. It can support the communication mode of DDN dedicated line/IP Internet or GSM/GPRS module, and can be compatible with multiple dedicated line access protocols such as China Mobile, China Unicom, and Telecom; The functions of this section are reflected in:

Supports ultra large information capacity (GPRS);

Support multi-level architecture (suitable for large-scale applications)

Support multiple access protocols (supporting multiple SMSC protocols of China Mobile or China Unicom, ISMG gateway protocol access);

Support multiple communication channels for information exchange;

Support comprehensive communication log recording and preservation;

Support interface hot start function, allowing for online disassembly of main modules;

Support cascading of similar communication gateways;

Support multiple heterogeneous sub centers with diverse access options (DDN, PPP, VPN, ADSL, etc.) simultaneously.

u       Management module

System management is implemented by specialized database management software, which manages system security, vehicle, user and other data, providing functions such as adding, deleting, changing, saving, querying, printing, etc.

u       Vehicle management

Implement unified registration, modification, editing, and management of vehicles. Vehicle information includes basic information, service information, status information, location information, etc., and is considered together with the vehicle GPS/Beidou monitoring and positioning system to provide management service interfaces.

u       Video management

Provide information management, viewing, and retrieval functions for vehicle wireless videos based on permissions.

u       Vehicle monitoring and scheduling system

The system combines GIS, GPS, MIS and other platforms to present a visual tracking interface to users, and provides users with various means of querying geographic information, allowing users to obtain real-time, easy to understand and accurate GIS information

u       Positioning and data transmission

The monitoring center can track the current location, speed, and direction of the vehicle at any time. When locating the vehicle, it can be monitored in various ways such as positioning, timing, distance, speed, route, range, and location. It has functions such as single point positioning, continuous monitoring, and key tracking and monitoring. And display the monitoring status of the vehicle on the system interface.

The vehicle positioning adopts dual positioning of Beidou and GPS, and also supports GPS and BD independent positioning to ensure the accuracy of positioning information, with a deviation of no more than 5 meters. The speed accuracy is 0.01 kilometers per hour, the cold start capture time is less than 40 seconds, and the re capture time is 2 seconds. The vehicle terminal uses 3G/GSM network to transmit data information to the central platform, supporting manual and automatic feedback of the vehicle's current location information. The minimum time interval for automatic feedback is 2 seconds. The functional requirements are as follows:

Collect time, longitude, latitude, speed, altitude, direction, and vehicle related status information, and upload them to the monitoring center through wireless communication;

Location status information such as time, longitude, latitude, speed, altitude, and direction can be stored inside the device; Capable of storing 10000 point data, with a recording time accuracy of within 24 hours and a cumulative time error of within ± 5 seconds;
After receiving positioning requests from the main or secondary monitoring center, it can upload positioning information and suspend real-time reporting from the corresponding center as required by the monitoring center; The time from receiving real-time positioning requests from the monitoring center to receiving responses from the terminal is less than 10 seconds;

When the vehicle is parked for a long time, the positioning information is uploaded at certain time intervals, and the time interval is set by the monitoring center;

The terminal uploads positioning information at certain time intervals, and the time is set by the monitoring center; In driving mode, the minimum timed reporting interval is 5 seconds, the maximum timed interval is no more than 60 seconds, and the default factory time is 30 seconds;

Trigger the upload of positioning information based on distance, and the distance interval can be set by the monitoring center; The default distance from the factory is 200m;

When a manual alarm is triggered, immediately upload location information.

u       Track replay

The monitoring center intuitively displays the position and driving trajectory of the vehicle on the electronic map. The database can be accessed at any time, and the specified vehicle's travel route trajectory can be replayed at the set time. The trajectory replay data can also be exported, and the vehicle terminal comes with historical trajectory storage. The vehicle can store 30000 trajectory points in network blind spots.

u       Voice scheduling

The system supports remote monitoring of the internal sound of the vehicle and can achieve two-way voice intercom to send voice instructions to the vehicle at any time.

Alarm monitoring: The car terminal is equipped with a call controller, earplugs, and microphone, which can directly sound an alarm or conduct voice monitoring in emergency situations.

Remote monitoring: Automatically turn on the microphone and turn off the speaker for monitoring when an alarm is triggered. During the alarm handling process, the monitoring can be turned on or off according to the actual situation.

Digital recording: Digital recording is stored while monitoring, and can be analyzed and replayed as needed.

Voice scheduling: broadcasting public information and conducting voice scheduling.

u       Vehicle control

The system supports remote control of vehicles and can remotely cut off/restore the vehicle's fuel circuit. The monitoring center can remotely restart the vehicle's system.

Terminal photography function: capable of capturing, timed shooting, and triggering photography with robbery alarm button

Oil level detection function: can be connected to an oil level sensor to detect fuel consumption

Temperature monitoring function: can be connected to a sensor for measuring temperature

u       Vehicle alarm

u       The system supports multiple alarm messages simultaneously:

Robbery alarm triggered: When encountering a dangerous situation, pressing the robbery alarm button will alert the monitoring center

Main power failure alarm: When the backup battery is turned on and the power is disconnected, an alarm will be sent to the monitoring center

Overspeed alarm: The monitoring center sets the speed limit value, and when the vehicle exceeds the speed limit, an alarm will be sent to the monitoring center

Fatigue driving alarm: When the driver continues to drive for more than the set time, an alarm will be sent to the monitoring center

Parking timeout alarm: When the driver stops continuously for more than the preset time, an alarm will be sent to the monitoring center

Alarm for entering and exiting the designated area: When a vehicle enters/exits the designated area, it will sound an alarm to the monitoring center

Proactive alarm: When a vehicle is illegally hijacked or an accident occurs, the user can proactively report to the monitoring center;

u       GIS functionality

u       Image display

Vector maps can be linked to other image maps, such as satellite photos, aerial photographs, etc.

u       Stepless zoom of the map

The map can be infinitely scaled, and the operation methods can include clicking on the map to zoom in/out by one, selecting a certain area on the map to zoom in/out to display the entire area, zooming in/out to a specific scale, and other methods. The entire scaling process is smooth and flicker free.

u       layer control

Through the layer manager, you can control whether a certain layer on the map is displayed and whether it can be queried.

u       Information annotation

Allow annotation of information points on GIS electronic maps, which support input, editing, and modification based on permissions.

u       Third party business system interface

It should be able to provide real-time dynamic positioning and status information data interfaces for third-party positioning application systems, and provide unified GPS/Beidou information services for other business systems.