Foreword
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With the acceleration of the global integration process and the increasing frequency of international economic activities and the rise of supply chain management ideas, the status of modern ports, especially large hub ports, is becoming more and more prominent. How to strengthen the management of large-scale port dispatching, security and other aspects Become a serious problem for construction and management.
Tiandi Weiye Large Port Video Surveillance System is a security technology prevention and management system that uses traditional video technology combined with modern communication technology to perform sensing imaging, signal transmission, centralized monitoring, image recording and linkage control for remote scenes. Due to its intuitive effect, it has increasingly become an important part of modern large-scale port management.
According to the overall planning and design requirements of the port digital video surveillance system, it is necessary to establish and improve various operation areas in the port area, such as anchorage, navigation, berth, yard, gate guard, public security traffic, environmental monitoring and other digital video surveillance systems. On the basis of establishing a video surveillance system in each operation area of ​​the terminal, it provides monitoring points and corresponding control means for customs, port public security bureau, maritime bureau, border defense and other cooperative units, and establishes a unified and shared video surveillance network with the above units. Gradually complete the construction of the port's digital video surveillance system.
Port video surveillance system demand analysis
Monitoring range
Monitoring of cargo terminals and container terminals such as container terminals and bonded warehouses; key places for customs supervision; helping customs border inspection departments to grasp the dynamics of jurisdictions, carrying out anti-smuggling work; ship-port interface at the forefront of terminals; dangerous goods operations; major hazards; pilotage; Implementation of the facility security plan; entry and exit vehicles, personnel, ships, and cargo.
Port video surveillance frequently asked questions
1. The construction period is long and the equipment is partially aging. Taking the first phase of a large port as an example, the terminal has been building a monitoring system since 1998. It has undergone several system renovations and repairs in 10 years, but the basic lines, some equipment connections and carrying systems are still old, and the contact is poor. Faults have occurred, and three faults have occurred in the last four years due to aging of the cable and interruption of external forces. It is not uncommon for other terminals to see such a situation.
2. The construction of monitoring systems for each terminal is separate and the construction standards are not uniform. There is no uniform standard for the construction of monitoring systems in Hong Kong. Each terminal company has its own set of independent system structures. In the customs control room, you can see the video surveillance system provided by four or five terminal companies. Each system is different. Each system resource cannot be shared, used, maintained and repaired, which is very troublesome.
3. The equipment between the joint inspection private networks is repeatedly invested, and the information cannot be shared. At present, the joint inspection units at all ports have the need for video surveillance through the network. However, because the border defense public security network, the customs special network, the maritime private network, and the terminal area networks cannot be interconnected, almost every unit that needs to be monitored is alone. A monitoring system has been implemented, and repeated investment and waste of resources are quite serious, and video resources between systems cannot be shared. If the image signals collected by the front-end camera are shared separately, it is of little significance and will be more confusing in terms of control permissions.
Port video surveillance demand characteristics
1. The scope of monitoring is large. For the selection of port monitoring points, the camera should be installed at the commanding height of the lighthouse in the port area. This way, the visual field is wide and accessible, and monitoring points can be set as little as possible, so that the monitoring area covered by each monitoring point is the largest.
2. 24/7 monitoring. The port monitoring point should be working around the clock. This requires the use of infrared-sensitive color-to-black-and-white cameras and day and night-type lenses, and the movement of people can be seen within 3 km. The outdoor integrated heavy-duty gimbal with screw drive is selected. In order to reduce the jitter of long-distance images, the installation of the camera must also be firm and stable.
3. The problem of electromagnetic interference is outstanding. Ports are generally built after decades of continuous construction, equipment, strong electricity, weak electricity, multiple systems cross-operation, electromagnetic interference problems are everywhere, so in order to obtain good monitoring results, we must consider the system anti-interference problem.
4. Lightning protection grounding must be safe and reliable. The soft rib of the monitoring system is the lightning protection and grounding of the front end. The lightning protection and grounding of the front-end equipment directly affect the safety and reliability of the whole project. Neglecting lightning protection and grounding may bring huge losses to the user. The principle of lightning protection is that all equipment must be installed within the protection range of the lightning rod. The grounding resistance is not more than 10Ω. The characteristics of lightning protection and grounding are the environmental effects and affect the actual effect of lightning protection and grounding.
5. System resource sharing. The port monitoring system not only needs to meet the needs of production and management, but also meets the regulatory needs of border inspection, customs, and maritime departments. Therefore, it is necessary to solve the problem of image resource sharing and control authority allocation.
Port video surveillance system architecture analysis
System architecture features
1. The newly constructed port visualization system is characterized by digitalization and networking, and can be remotely viewed and controlled, providing an open interface specification for easy external monitoring;
2. Using the combination of analog and digital, the front-end to the dispatching room monitoring center adopts analog transmission and control mode to ensure image quality and real-time operation, and digitize in the dispatching room monitoring center;
3. Using optical fiber as the main transmission means, combined with other flexible transmission means;
4. Using digital networking to provide high-definition images and safe and reliable video systems for each monitoring center;
5. Establish a unified management platform, unified authority management, unified planning and construction to achieve multi-level management requirements;
6. The whole system is scalable, stable and adaptable to the port environment;
7. Meet the requirements of the port business system, customs, port public security bureau, maritime bureau, border defense and other monitoring centers for the rational allocation and control of monitoring points;
8. Realize online browsing and control;
9. Realize the whole process of ship and cargo entry and exit, and comprehensive system tracking management.
System overall topology
According to the geographical location and the realization of functional requirements, the overall structure of Tiandi Weiye Port video surveillance system is divided into three levels: front-end monitoring points, dispatch centers, and general control centers. The implemented process includes: acquisition of front-end signals, transmission of signals, encoding processing of back-end signals, and user access. The root node is the total monitoring center of the port, the first-level parent node is each dispatching center, and the child nodes are the monitoring front-ends distributed in each port. The dotted line part of the system is transmitted by optical fiber, and the video signal and control signal of the front end are transmitted to the dispatching center through the optical transceiver, and centralized management is performed by the matrix system of the dispatching center. In order to realize digital network monitoring, a video encoding device is placed in the dispatching center to convert the analog signal into a digital signal for transmission in the network. Each dispatching center is assembled to the total monitoring center, and centralized management of all systems is realized in the total monitoring center.
Dispatching room monitoring center system architecture
In the dispatch center, the optical output video signal of the optical transceiver first enters the video distributor, and provides video input to the matrix system and the video encoding device system respectively. The video control matrix is ​​output to a large screen device in which the video encoding device digitizes the analog signal and intervenes in the network system. The video forwarding server (or video proxy server) uniformly manages and forwards video data to mainly solve the performance difference of the video encoding device and alleviate the bandwidth pressure of the network trunk. The user logs in to the video platform server and obtains the application process of monitoring the video data stream from the video forwarding server.
Among them, the video monitoring head (including the protocol decoder and the cloud platform) and the video line, control line, optical fiber, and power supply connected to the monitoring center belong to the device link layer, which is the basic device of the entire visualization system, and provides image acquisition and transmission functions. . The video matrix is ​​responsible for the access of the front monitoring points in the control room, and is responsible for switching input and display between the various view frequencies. The video encoding device and the matrix connection are responsible for converting the video signal control signals into IP protocol data and accessing the network. Partial input intermediate coupling layer, in addition, the connection between the video encoding device and the video matrix needs to correspond to the matrix control protocol, baud rate, protocol number, and the like. The management platform server and the video forwarding server correspond to the core layer of the system, which is the management core of the entire system. The server supports the operation of the management platform, provides an interface for video calls of each system, and the storage device provides functions such as video storage and streaming media services for other systems. Calls to video clips and scene captures. The dispatching indoor staff can switch the video screen and browse the video recording in the computer system, and the network user can use the computer in the existing network to use the visualization system on the application system. All digital video signals are transmitted in MPEG4-based HD format (D1720×576) with a bandwidth of approximately 2 Mbit/s.
Software architecture and functionality
Mainly based on Universal Streaming Service Architecture (USSA), graphical GIS information service, privilege grading management, video common interface, background management service, streaming media management service, association trigger service, video conference management, automatic The scheduling console and other services are composed of basic functions such as application services, streaming media transmission services, database services, Web services, JSP pages, ActiveX controls, and various drivers to provide real-time monitoring, multi-screen switching, and cloud mirroring. Control and round robin, video and playback, alarm and linkage, powerful user rights management and security authentication, etc., can easily realize remote monitoring, distributed monitoring (cross-region multi-level, multi-center monitoring), distributed recording, combined alarm Strategy, etc. In conjunction with the multicast function of the network device, network traffic can be effectively reduced to ensure smooth network.
With the improvement of management level, the visualization system, as an advanced carrier of modern management, can be combined with the production management system to gradually put the main contents of the production management system such as safety, ship dynamics, parking, vehicles, warehouses, The operation information such as the silo is visually revealed through the visualization system, so that the production management system is closer to the actual use needs.
Port video surveillance system application trend
High resolution digital surveillance
The application of high-resolution IP video surveillance can effectively reduce the number of cameras in the video surveillance system, reduce the labor intensity of the monitoring personnel, improve the image quality, improve the monitoring level, and provide clear in the event of security or other events. Monitor video to analyze the cause of the incident or investigate the incident responsibility. Therefore, the application of high-resolution IP video surveillance can be used as one of the development directions of port video surveillance systems.
Intelligent video analysis
Intelligent video surveillance is a combination of intelligent tracking and recognition technology for moving targets. It uses the principles and methods of background subtraction and pattern recognition to detect and identify moving objects in video, and then track and record the running trajectory and motion information of each object. Then analyze in real time whether these sports and the preset alarm events match, and if they match, an alarm is issued for intervention or disposal.
The composition of the intelligent video surveillance system is basically the same as that of the usual digital and networked video surveillance system, including digital cameras for video data acquisition, encoders and video servers for application processing, routers for transmission control, stored DVRs, and video viewing. The difference between the monitor and the management system software is that the intelligent video surveillance system is equipped with an intelligent image processing system in the digital camera or management system software.
Port video surveillance uses intelligent analysis technology, which is intended to determine in real time whether the motion characteristics of moving objects may threaten port security. If the motion characteristics of moving objects may threaten port security, measures to prevent the occurrence of security incidents are taken in real time to avoid or reduce the occurrence of security incidents. Most of the motion characteristics of moving objects in port facilities that may pose a security threat, such as the direction of the vehicle on the road, the entry and exit of vehicles or restricted areas of personnel, the long-term gathering of a certain number of people, the long stay of vehicles or personnel in specific areas, The specific vehicle or personnel's whereabouts, etc., can be identified by the behavior recognition method in the intelligent video surveillance system, thereby automatically issuing an alarm. The monitoring of some security areas in the port security video surveillance system can utilize intelligent video surveillance technology to reduce the labor intensity of the monitoring personnel or the number of monitoring personnel while effectively ensuring the quality of real-time video surveillance, increase the security of the first line, and improve the security of the port. Level.
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