At present, China's urban security work is mainly based on ordinary cameras and other equipment with a monitoring distance of 5-100 meters. However, with the increasing scale of cities, the urban environment is becoming more and more complicated, especially the emergence of super high-rise buildings. Due to the environmental barriers and the limitations of the cameras themselves, it is very difficult to fully realize the basic unobstructed comprehensive monitoring. Therefore, long-distance surveillance (1m-10km) at high altitudes becomes a practical need. High-altitude observation makes use of its sufficient height to match the performance of the camera's gimbal, which can easily achieve a wide range of accurate monitoring, which is conducive to early detection and early warning, and to minimize losses. With the development of security informatization, traditional monitoring equipment can no longer meet the application requirements of large-scale security management due to problems such as small monitoring range, low resolution, and poor night vision capabilities. In recent years, due to the application of long-distance laser night vision devices, it can realize the observation range and night vision ability of several times or dozens of times of traditional monitoring equipment, and has gradually been recognized by users.
1. Design basis and principles
The high-altitude lookout video surveillance system is designed to meet the needs of road traffic safety, environmental monitoring, urban counter-terrorism, emergency search and rescue, and surveillance of illegal gatherings of people. It includes key links such as video signal collection, transmission, identification, and integration with dispatch and command systems. It has a high degree and strong real-time performance. The system adheres to the construction principles of advancedness, practicability, reliability, economy, integration and scalability. The urban high-altitude observation monitoring system integrates a high-performance imaging system and a gimbal control system. The system's front-end acquisition equipment is installed at the highest point in the city, using optical cables or other communication lines for transmission, and display video equipment is installed in the monitoring center. The system uses long - distance high-definition laser night vision to observe, search and monitor and track targets. It can work 24 hours a day, day and night, and can efficiently find, identify and confirm targets.
2. System composition
The high-end high-definition laser camera is used as the front-end equipment of the urban high-altitude observation system, and the effective surveillance radius should be greater than 5 kilometers. At night, high-power lasers are used for fill-light illumination, and clear images can also be obtained. The matching high-precision intelligent gimbal can effectively reduce the damage caused by strong wind to the front-end equipment to obtain a stable image. The shield has the functions of automatic temperature control, anti-theft, lightning protection, rain, dust, and corrosion protection, and the protection level reaches at least IP66. The system uses standard and open technologies. The transmission of information should use the TCP / IP protocol, and the encoding and decoding of the image should be based on the H.264 general standard.
3. System topology diagram
4, system significance
The city's high-altitude observation system can realize 360 ° panoramic monitoring of the city, and it can dispatch and direct the disaster prevention and relief of the armed police, public security, fire protection, transportation, environmental protection and other departments, reasonably guide the pedestrian flow, and improve traffic congestion. At the same time, the city's high-altitude look-ahead monitoring system automatically detects illegal urban assembly, directs anti-terrorism on-site command in cities, emergency search and rescue of major accidents in the city, and clears and manages personnel in important areas of the city. The construction of an urban high-altitude observation monitoring system is an effective means to promote the modernization of early-warning work with informationization, improve the early-warning ability of cities, the ability to respond quickly to emergencies, and the ability to visualize dispatch and command.
Third, the main application areas
Civil Air Defense: Urban air defense remote warning video surveillance linkage command system. The intuitive video surveillance system of the civil air defense department effectively protects the important facilities of large and medium cities in the country's political and economic centers, as well as prevents and mitigates the damage of air strikes and disasters, and protects the safety of people's lives and property.
Urban fire protection: Long-distance early warning linkage command system for urban high-rise buildings. Through the system, the independent automatic fire alarm systems in each building are networked, and the geographic information system is comprehensively used to implement real-time monitoring of the fire alarm situation of all networked buildings and the centralized management of fire protection information system.
Safe city: 24-hour remote warning and surveillance linkage command system for urban disaster prevention and counter-terrorism. Through the management system, it can not only meet the needs of public security management, city management, densely populated management, emergency command, etc., but also take into account the needs of video surveillance in disaster early warning, production safety monitoring, urban air pollution monitoring, etc .; Degree of safety and comfort of people's lives.
Intelligent transportation: remote video surveillance linkage command system for traffic automation. The system collects, processes, publishes, exchanges, analyzes, and utilizes the collected video image information of the traffic status to provide diverse and intuitive video data guidance services for traffic participants.