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In recent years, with the rapid development of my country’s economy and the rapid development of public transport and passenger transportation, people can reach their destinations quickly and comfortably, bringing great convenience to people’s lives and work. At the same time, safety and management issues in the process of bus operation have gradually emerged. Disputes between passengers and operators due to service attitudes, fare evasion, etc. continue to occur throughout the country, and illegal cases such as theft, robbery, and bus explosion on bus passenger vehicles Occurrences have seriously threatened the safety of passengers’ bodies and property. Once a major vicious incident occurs, it will have a great impact on society. For example, in 2008, there was a serious bus explosion in Kunming and the burning incident of a bus in Chengdu not long ago. , Which caused many deaths and injuries, caused a certain amount of psychological panic to the masses, and also affected the normal operation of highway passenger transportation. Therefore, security monitoring in the bus passenger transportation line is urgent. By installing the bus wireless monitoring system, these problems that have been plagued by the management of bus companies and related departments can be solved.
System Overview
The bus wireless monitoring system can realize multi-angle real-time monitoring and recording of audio and video information during bus operation, and transmit the information to the monitoring and dispatching center in real time through wireless transmission, where the bus company or public security personnel in the center can understand in real time In the event of an accident, effective measures can be taken immediately to protect the life and property of passengers, and the video data can provide strong evidence for tracing and dividing responsibilities after disputes and criminal cases occur.
system structure
The bus wireless monitoring system is composed of multiple parts such as bus internal monitoring, wireless transmission, central monitoring and emergency linkage.
In-bus monitoring
A total of 4 cameras are installed in the front, center, and rear of each bus, which are located on the upper left side of the driver, above the back door, and behind the vehicle, and one is aimed at the front windshield. Through these 4 cameras, in the process of driving, every move of passengers on the bus can be clearly seen on the on-board monitor. After the bus enters the station and opens the door, the passengers getting on and off the bus can be seen on the monitor. To avoid potential hazards as much as possible.
At the same time, an alarm is installed in the bus, one near the driver, and other alarms are distributed in the bus. In emergencies, passengers and drivers can press the alarm button, and the car will immediately sound an alarm to remind passengers to evacuate.
Video, audio, alarm and other monitoring information in the bus can be connected to the wireless monitoring front-end, and transmitted back to the bus dispatching monitoring center in real time through wireless means for decision-making and commanding.
3G wireless transmission
The monitoring information in the bus is uploaded to the monitoring center using 3G wireless transmission technology. Because of its mobility and high bandwidth, 3G wireless transmission technology makes the traditional security monitoring methods have a more in-depth integration application, which is very suitable for bus passenger monitoring.
In the past in-vehicle mobile surveillance, wireless transmission technology could not better meet the system requirements, such as the application of GPRS network transmission, the bandwidth is too narrow, and the video takes up a lot, so how to transmit the image data in motion to the corresponding monitoring center is realistic problem. The 3G high-bandwidth wireless access supports uploading images and receiving remote images at any place, so that technical problems that could not be achieved in the past can be solved with the improvement of 3G wireless transmission technology.
The different 3G technologies of the three major operators (China Mobile TD-SCDMA, China Telecom CDMAEVDO, China Unicom WCDMA) are gradually achieving network coverage in large and medium-sized cities. Therefore, once the mobile phone signal is covered in the public transportation line, coupled with the 3G transmission rate, even if the vehicle is in high-speed operation, the upload of monitoring information in the vehicle will become simple, thereby improving the ability to deal with emergencies. The operational safety of transportation will also be greatly enhanced. At present, the initial 3G network upload bandwidth can reach 384kbps, which is enough to transmit 1 CIF real-time image, and the upgraded version of 3G HSDPA will support a maximum transmission rate of 2.8Mbps. High-definition, multi-channel video transmission will make car monitoring easier.
In this system, the in-vehicle wireless monitoring terminal compresses the in-vehicle video through a video compression encoding module, transmits it to the nearby operator base station through the 3G wireless communication module, and then transmits it back to the bus monitoring center through the VPN network to realize the interaction of video data, Send/receive, encryption and decryption, encoding and decoding. Integrating the advantages of 3G wireless network and Internet network, it ensures the normal communication of data and video during vehicle movement.
monitoring Center
After the bus monitoring information is transmitted back to the monitoring center, it is managed by the monitoring management platform. The monitoring management platform is mainly composed of a central system management server, a streaming media server, a WEB server, a database server, an alarm server, a command and dispatch server, a GIS server, a video server and a network storage device, etc., to achieve the control and management of all system resources, each The monitoring personnel realize the monitoring of the front-end bus through the monitoring management platform.
The bus dispatching and monitoring center uses a decoding matrix to display the video on the video wall of the car’s monitoring video, and monitor the running status of the vehicle in real time; at the same time, the monitoring staff can also monitor on the client through on-demand according to the actual situation. When personnel click the mouse on any car, the position, speed, and driver’s feedback information of the car can be displayed immediately. By understanding these conditions, voice intercom is used to send instructions to the driver of the car to realize intelligent dispatch. For example, when the monitoring center sees the flow of traffic and people at the first time during peak hours, it can immediately determine the increase or decrease of vehicles and solve the problem of bus dispatching.
At the same time, through monitoring information, once a suspicious situation is discovered, immediate measures can be taken to avoid major dangerous incidents.
The system is equipped with network storage equipment to realize real-time storage of surveillance video. The storage methods can be timing, manual, alarm storage, etc., to provide a basis for subsequent analysis.
The monitoring center can also set up multiple sub-control centers in accordance with the actual needs of bus transportation. The monitoring center and each sub-control center can be connected through LAN, WAN, or through the Internet network. In the sub-control center, you can view the progress of each vehicle on the road, and you can also perform some tasks assigned by the monitoring center, such as the scheduling of vehicles under the jurisdiction of the fleet.
Emergency linkage
The monitoring system is connected to the public security private network through the gatekeeper equipment to realize emergency linkage with public security, traffic management and other government functional departments. If there is an emergency, the public security and other government functional departments can immediately obtain on-site information, and timely understand the development of the situation on the spot. Accurately analyze and judge, respond quickly to incidents, and reduce economic losses and casualties.
System Features
Perfect monitoring and management platform
The bus wireless monitoring system takes the monitoring management platform as the core to realize the control and management of all monitoring resources. The entire system adopts a distributed architecture. The video surveillance management platform provides hierarchical and decentralized sharing of video resources, which improves the overall efficiency, reliability and cost-effectiveness of the system, and can realize multiple application functions for users;
Advanced access method
The system adopts the transmission mode of 3G wireless plus VPN network, which effectively solves the access of public transportation mobile video to the monitoring center, realizes a large-scale coverage, and conducts real-time monitoring without being restricted by area or distance;
Efficient image compression
Using the H.264 video compression algorithm with a very high compression ratio, the network resource is low, and high-quality and smooth images can be transmitted under low-bandwidth conditions;
Professional and reliable storage
The system supports a highly reliable network storage storage mode. Through the platform video server, the storage resources in the system storage devices can be efficiently managed, the storage resources can be virtualized, and the storage distributed deployment can also be realized;
Strict information security
Make full use of network tunnel, 128-bit encryption algorithm, firewall/VPN, encryption lock, authority management, security authentication, real-time clock and other technologies to ensure that the monitoring system and video data are not used or destroyed by unauthorized use;
Convenient operation management
The system uses a graphical interface to provide users with flexible monitoring screen selection, use of electronic maps, and realize image capture, video and video playback, alarm and alarm linkage functions;
Rapid emergency linkage
Through the sharing of monitoring information with public security and other government functional departments, the emergency linkage can be realized, and the rapid response capability, command capability and emergency response capability can be enhanced.
Concluding remarks
The bus wireless monitoring system can effectively prevent and control the occurrence of emergencies in the bus line, and protect the safety of people’s lives and property. After the establishment of the system, passenger transportation companies and management departments can understand the operation of vehicles and rationally allocate capacity; The abnormal situation of the country can be discovered through the camera in time and dealt with urgently. It is of extremely important significance for combating crime and terrorism, maintaining social harmony and stability, and protecting citizens’ lives and property.
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