Internet of Things technology builds public transport safety management solutions
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With the acceleration of economic and social development and urbanization, the problem of urban traffic congestion has become increasingly serious, and major cities are promoting the development strategy of “transit priority”. How to ensure the safe operation of public transport vehicles and rationally dispatch limited public transport vehicle resources is a major problem that plagues public transport system managers.
The application of Internet of Things technology to public transportation safety management can effectively solve related issues such as vehicle supervision, station security, dispatching business, etc., realize the digital and intelligent transformation of the public transportation industry, and improve the management level and work efficiency of the industry.
The Internet of Things technology bus safety management application is mainly composed of two parts: on-board monitoring system and station monitoring system, using advanced “things-to-things technology” to extend and expand the user end to any objects in public transportation vehicles and depots. Data exchange and communication provide a comprehensive and three-dimensional solution to the regulatory problems of the public transport industry.
1. Vehicle monitoring system
The on-board monitoring system is composed of multiple sub-systems, each sub-system communicates data through the agreed Internet of Things protocol, and the collected information is summarized to the bus monitoring center for processing.
(1) Vehicle video surveillance system
The amount of video data transmission is relatively large. The vehicle-mounted video monitoring subsystem and the wireless network transmission subsystem are combined into one (that is, the vehicle-mounted hard disk video recorder with built-in 3G module). The vehicle-mounted hard disk video recorder compresses the collected vehicle video signal and passes it through the 3G wireless network. Transmission to the command center. The vehicle-mounted video surveillance system uses a large number of Internet of Things technologies, such as 3G wireless video network transmission technology, data interaction technology between vehicle-mounted hard disk video recorders and other vehicle-mounted terminals.
The on-board video surveillance system effectively solves the problems of theft, robbery, service disputes, and passenger embezzlement of fares encountered by public transportation safety supervision, and at the same time curbs the occurrence of terrorist attacks on public transportation vehicles.
(2) Bus dispatch management system
The bus dispatch management system is responsible for bus business management, and consists of the following parts: GPS positioning subsystem, dispatch management subsystem, stop announcer subsystem, traffic record subsystem, credit card reader subsystem, etc.
Related IoT technology applications: the vehicle terminal will report the collected GPS positioning information to the command center in real time; the command center will send dispatch information to the vehicle terminal and exchange data with the dispatch terminal; the station announcer subsystem can be based on the GPS positioning information Carry out voice station announcement; the driving record subsystem and the card reader subsystem regularly report business information.
(3) Information interaction between the on-board video monitoring system and the bus dispatching management system
Through the Internet of Things technology, the on-board video monitoring system and the bus dispatching management system can be organically combined to exchange work status information with each other.
Take the Ningbo bus Internet of Things management system as an example. Hikvision’s on-board video surveillance products and SEG’s dispatch management terminal successfully exchanged business data using the Internet of Things protocol: the dispatch terminal sends vehicle positioning information to the on-board hard disk video recorder. And record it in its hard disk; the on-board hard disk video recorder informs the dispatching terminal of the running status in real time. In the event of equipment failure or man-made damage, the dispatching management system can be used to arrange personnel for maintenance in time.
(4) Monitoring center
The monitoring center is responsible for the unified management of various data. The on-board terminal summarizes the video data, GPS positioning information, vehicle driving information, alarm information, equipment failure information, etc. and reports it to the monitoring center, and the monitoring center classifies and processes related data.
The business data processing subsystem collects GPS positioning information and vehicle driving information, and through real-time processing of vehicle condition information, and issuing vehicle dispatching instructions, the remote bus dispatching management function is realized.
The safety supervision subsystem collects vehicle driving information, alarm information, video data, equipment failure information, etc., and understands the vehicle operating status in real time through relevant information analysis. When different alarm situations occur, corresponding treatment plans can be implemented. If equipment fails, it will be automatically generated Send a work order to arrange personnel to maintain the faulty equipment.
2. Station monitoring system
(1) Vehicle and driver management
Vehicle and driver management adopts RFID radio frequency identification technology to save bus access time and vehicle number records to prevent off-duty vehicles from leaving the parking lot; the driver needs to swipe the identification card before starting the vehicle and send relevant information through the on-board dispatch The terminal is uploaded to the monitoring center, and the monitoring center automatically compares vehicle information and driver information to avoid problems such as staggering vehicles.
(2) Site monitoring
Bus stations are frequently visited by pickpockets. The installation of video surveillance equipment on the station can effectively deter theft; at the same time, the dispatch center can check the status of the station and other bus personnel in real time. If crowded people are found, the bus can be used to coordinate the capacity.
(3) Parking lot monitoring
In addition to installing RFID card readers to realize the identity of vehicles and drivers, some bus companies try to install high-definition cameras with license plate recognition function at the entrance of parking lots to prevent outsiders from driving buses, and take pictures while recognizing vehicle license plate information. A photo of a vehicle on the scene, requiring the photo to be able to clearly see the facial features of the driver.
3. Analysis of Internet of Things technology related to public transportation safety management system
(1) Wireless network transmission technology
Due to the particularity of the movement of public transportation vehicles, the network transmission medium generally uses the wireless network of the operator. The 3G network has been licensed for more than a year, and the network has covered most cities and urban areas in China. This is useful for the application and development of Internet of Things technology in the public transportation industry. enhancement.
Compared with the 2G network, the bandwidth of 3G network has increased exponentially, which may meet the needs of CIF format low bit stream video network transmission. Due to operator’s network tariff restrictions, most of the current bus-car video transmissions use on-demand network transmission: when there is a police situation, dispute, or a large number of passengers are stranded, the driver presses the alarm button, and the monitoring center pops up related videos. The 3G network can also realize the data exchange of various bus services, which is convenient for the dispatching and management of the monitoring center.
(2) Application of Internet of Things technology for vehicle hard disk video recorder
In the vehicle-mounted terminal, the vehicle-mounted hard disk video recorder is slowly developing to the core terminal equipment, and it is playing an increasingly important role in the public transportation safety supervision system.
In addition to the video and audio collection function, the vehicle-mounted hard disk video recorder can also support wireless network transmission, GPS positioning, driving information recording, dispatch management, multimedia broadcasting and other functions. The unified management of the system terminal can also save a lot of labor costs and improve the level of business management.
Summarize
The public transportation safety supervision system uses a variety of electronic equipment produced by different manufacturers, and the compatibility of data communication protocols between different equipment restricts the promotion of the system; with the development of the Internet of Things technology, the agreement between various terminals has become more and more perfect. In the near future, the public transportation safety management system of the Internet of Things will become an inevitable trend in the development of public transportation business.
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