Application of Wireless Internet Technology in Bus Security

The increase in Shenzhen's bus capacity is just a microcosm of the development of the entire Chinese public transport. With thousands of buses, how do they manage it? The increasing number of security cases such as thefts and brawls on buses as well as flight evasion, surveillance of flight attendants and drivers, etc. have also brought a significant management bottleneck to the management of public transport companies. Based on the above requirements, bus safety systems have gradually been put into practical use in bus management applications in recent years, and this demand is gradually expanding.

Jinjing Zhang Video Technology (Shenzhen) Co., Ltd. Zhang Jingwu, director of mobile products, said: "With the vigorous development of public transport passenger transport, operators in the operating process of security, management, more and more attention, install a set in the bus Mobile monitoring system is very necessary.The buses that installed vehicle DVRs in previous years are basically based on government macro regulation or installation under special conditions (city transport, Asian Games), and buses are mainly concentrated in China’s economy. Developed regions, such as the Pearl River Delta and the Yangtze River Delta; Recently, because of public safety and industry management requirements and other factors, the demand for bus-mounted on-vehicle monitoring products in second- and third-tier cities in China is also increasing day by day, coupled with the entire vehicle-mounted monitoring equipment technology. More and more sophisticated and cost-effective, making it possible to install on-board monitoring products in buses in most cities."

The monitoring needs to be clear. The construction of the bus security system started relatively late. It has only improved a bit in recent years and has continued to develop along with the progress of the security industry. Vehicle monitoring is self-contained and it is a small mobile monitoring site. Different application requirements have different installation solutions. Generally, the following points are included.

· Public security monitoring: buses are used as public travel tools. Colored people will stay here. Therefore, some lawbreakers have focused their attention on public transport, making buses a frequent source of thefts and other public security cases, and the public security department will pass the bus companies. Several in-vehicle condition monitoring cameras are installed in the vehicle compartment, generally one for the front door and one for the back door, which are used to monitor the conditions of getting on and off the passengers. A camera is also installed at the front of the cabin and at the rear of the cabin to monitor the conditions inside the cabin.

·Monitoring of Drivers and Ticket Sellers: Bus companies pay more attention to the problems of their own personnel and understand the working conditions in the vehicles through monitoring equipment. For example, cameras at the front of the carriages are aimed at drivers, and they can check whether the drivers are operating in accordance with regulations and indecent behaviors. Drivers drive autonomously; ticket sellers must also install cameras, check ticket sales, and supervise ticket sales;

· Pre-vehicle monitoring: The bus may encounter some unexpected traffic events during driving, such as lane change, rear-end collision, etc. When a traffic accident occurs, the responsibility can be determined through video recording; at the same time, the front camera captures After the video is transmitted to the background, it can also serve as a background to understand the information sources of the vehicle's driving status (vehicle position, vehicle speed, and road congestion), facilitating the command and dispatch of the background.

· Car rear monitoring: It can be used in the reverse, after being rear-end, etc. The camera is placed behind the car, when the driver performs a reverse action, the car display will automatically switch to the rear monitoring channel;

• There is also vehicle-side monitoring, which is used to monitor the conditions of getting on and off the passengers and running on both sides of the vehicle.

China's public transport security monitoring is mainly focused on security monitoring and monitoring of drivers and ticket sellers. Additional applications are required for other applications. “The current common bus-borne surveillance is still implemented as analog cameras plus vehicle-mounted DVRs or analog cameras plus vehicle-mounted DVSs. Vehicle-mounted DVRs/vehicle DVSs generally use 3-way video access, and some cities use 5-channel video access, 5 channels. The video access is more video-capturing than the three-channel video access system." Zhang Bing, the sales and support manager of Shenzhen Langchi Xinchuang Technology Co., Ltd., introduced it.

For the construction of on-board monitoring systems, various manufacturers have different R&D goals. For example, resolution and other specifications will be different. According to Jin Sanli Zhang Jingwu, most of the cameras used in bus monitoring systems are infrared night vision hemispheres. CCD, resolution of 420 lines / 480 / 540 lines of three grades, night vision distance up to 15 meters, built-in pickups, so that audio and video synchronization video, connector for professional aviation head. Zhuang Weiyong, sales director of security product line of Shenzhen Tongzhou Electronics Co., Ltd., believes that low illumination is more suitable for public security monitoring. “Infrared is a night vision system that can provide infrared light that is invisible to the naked eye and illuminate the subject. A tool to improve brightness assistance, and the vehicle does not have a completely dark interior during night driving. It is somewhat shimmering. Low light (0.01 Lux(F1.2)) is under weak (or star) night vision. It is possible to capture clear images by color-to-black, eliminating the need for infrared fill light, so cameras with infrared capabilities can be eliminated.” So, they use the SONY 1/3 Super HAD CCD High Sensitivity Sensor Low Illuminance Camera to distinguish The rate is 530 lines, and requires equipment with automatic gain control, automatic white balance, backlight compensation, etc. Of course, in order to better see the face, you can also use higher resolution products.To facilitate the installation and debugging, the camera lens must be Three-axis adjustable, and use short-focus wide-angle lens (up to a maximum viewing angle of 90 °), making the monitor a wider range of images. The resolution of D1, face, action, etc. can see, the car can meet the monitoring requirements; and monitoring at night, which should be determined using the low-light technology to capture the actual situation and cost estimates.

In addition, the construction must also pay attention to: buses are generally more dirty, chaotic, so the camera must have a certain degree of waterproof, dustproof performance, if it is installed in the car, but also have a good explosion-proof performance. In actual operation, the camera must be installed firmly. To withstand the frequent shaking test of the car, the camera is always in consistent swing with the body, so that the captured image will not be shaken.

The storage should be stable. As the bus plays the role of a mobile island, it cannot directly access the wired network. After the camera collects the image information, it uploads it to the onboard hard drive for temporary storage. Due to the special conditions of the bus, there will be vibrations at any time, which puts high demands on the onboard storage technology.

The increase in Shenzhen's bus capacity is just a microcosm of the development of the entire Chinese public transport. With thousands of buses, how do they manage it? The increasing number of security cases such as thefts and brawls on buses as well as flight evasion, surveillance of flight attendants and drivers, etc. have also brought a significant management bottleneck to the management of public transport companies. Based on the above requirements, bus safety systems have gradually been put into practical use in bus management applications in recent years, and this demand is gradually expanding.

Jinjing Zhang Video Technology (Shenzhen) Co., Ltd. Zhang Jingwu, director of mobile products, said: "With the vigorous development of public transport passenger transport, operators in the operating process of security, management, more and more attention, install a set in the bus Mobile monitoring system is very necessary.The buses that installed vehicle DVRs in previous years are basically based on government macro regulation or installation under special conditions (city transport, Asian Games), and buses are mainly concentrated in China’s economy. Developed regions, such as the Pearl River Delta and the Yangtze River Delta; Recently, because of public safety and industry management requirements and other factors, the demand for bus-mounted on-vehicle monitoring products in second- and third-tier cities in China is also increasing day by day, coupled with the entire vehicle-mounted monitoring equipment technology. More and more sophisticated and cost-effective, making it possible to install on-board monitoring products in buses in most cities."