The first chapter system overview

1.1 overview

In recent years, with the continuous development of electronic technology, information technology is the wave of shock and changing people's traditional way of thinking, work methods and fields in today's society. To promote the modernization of the project engineering, intelligent, scientific, using high-tech means to further strengthen the work and ensure the project engineering, we according to the requirements of the tender documents, in line with high standard, high quality, improve product performance and low cost; On the design fully embody the builder's intentions, and considering the future user maintenance, use, maintenance convenience, the company system for many years engineering experience, design the overall scheme of security system.

1.2 construction goal

Government building security video surveillance project is included in the intersection, the place such as corridor, door, the important place to install surveillance cameras, digital network monitoring system of the different sources and different formats, different control methods of analog video or digital video integrated on a unified platform, distributed centralized management control mode is adopted to improve the management and control, to achieve full video monitoring system of network, digital, intelligent, and gradually development form the unified coordination of dynamic video control system.

1.3 the basic train of thought

By using the computer multimedia technology, audio and video technology, modern communication technology, automatic control technology, such as multi-functional, comprehensive intelligent monitoring system. In design should first ensure that the government building security monitoring system of advanced, in the concrete implementation and based on the principle of economy, practical, reasonable and reliable to configure the system hardware and software, and system configuration of hardware and software must be modular, open structure, so as to expand in the future.

The second chapter system

2.1 design principles

When designing the whole system, we in line with advanced technology, the system is practical, reasonable structure, and low product mainstream

Cost, low maintenance as a starting point.

2.1.1

The advanced nature of technology: the selection of the whole system, software and hardware equipment configuration are to comply with the new and high technology of tidal flow, the key of digital video, compression, decompression, stream, transmission adopts is widely used in engineering construction technology at home and abroad with the products. On the premise of meet the function, system design to be advanced, and maintain advanced in a period of time in the future.

2.1.2

Reasonable architecture: adopt advanced and mature technology to structure system of each subsystem is stable and reliable, can make it safe and smooth operation, effectively eliminate the bottleneck of each subsystem may produce, choose the right equipment to ensure that each subsystem has a good scalability. Stability and safety is our most concern, only stable and reliable system can ensure the normal running of the equipment; Only good data sharing and real-time fault repair, such as real-time backup to form a complete management system.

2.1.3

mainstream products: when the equipment type selection, mainly according to the actual situation of our city combined with the current market share of products to choose products with optimal price performance ratio and expansion ability.

2.1.4

low cost, low maintenance cost: the design of system and the product should be simple, practical, easy operation, easy maintenance. Easy operation and maintenance of the system is to ensure the computer professionals can make good use of this system.

2.1.5

centralized management: front field devices, each subsystem has focused on the center of unified control, implementation of all the remote device control, setting up, to ensure the efficient and orderly, reliable of system play its management function.

The third chapter system design

Closed-circuit television monitoring system's main function is to live monitoring on site. It makes the management in the control room that can be observed in all the important place, will be monitoring the situation in image real-time transmission to the management center, the personnel on duty by master display can be informed of what is the important place. Closed-circuit television monitoring system in accordance with the structure can be divided into: camera, transmission, control and display record four parts.

Camera parts: is installed at the scene, it includes cameras, lenses, shield, bracket and electric yuntai. Its task is to camera of your subject, and the optical signals into electrical signals.

Transmission parts:sends the site electrical signals from the camera to the control room, it generally includes cable, line drive equipment. Display and recording part: converts the electrical signals of the site into the image displayed on the monitoring equipment, and can keep the image with the hard disk video recorder down; So, it mainly includes a monitor, hard disk video recorder, etc.

Control part: responsible for the control of all equipment and image signal processing. Add video switching between input and output devices (video matrix), in charge of the video signal switching.

Equipment components:(1) the front-end equipment mainly include: fast ball, video cameras, lenses, shields, decoder, etc. (2) transmission equipment are: the video transmission cable, control cable, junction box, etc. (3) shows recording equipment are: main control monitors, printers, etc. (4) control equipment mainly include: hard disk video recorders, the control software packages, etc.

The control part

Transmission parts

The acquisition part

Display and record