Government Security Monitoring System Solutions
First, System overview
1, an overview
In recent years, with the development of electronic technology, the wave of information technology is impacting and changing people's way of thinking, working and social fields.
For vigorously advance this items engineering of modern, and intelligent of, and scientific, with hi-tech means further strengthening and guarantee this items engineering of the work, we according to tender file of requirements, in high standard, and quality, improve products of performance price than; in design Shang full reflected builders of intent, and consider to future using who of maintenance, and using, and maintenance of convenient sex, combined XX Government building monitoring site survey results, to company years systems engineering experience, design has security prevention system of general programme.
2, the construction of purpose
A government building security video monitoring engineering including in junction, and corridor, and door, and important places, at installation monitoring camera, composition digital network monitoring system, put different source, and different format, and different control way of simulation video or digital video integrated in a unified of platform Shang, used distributed concentrated management of control mode for management and control, achieved all video monitoring system of network, and digital, and and gradually development intelligent of, formed unified coordination of dynamic video command system.
3, basic ideas
Use multimedia technologies, audio and video technology, modern communications technology, automatic control technology, form a multifunctional and integrated intelligent monitoring and control system.
Designed to let the Government building monitoring and security system of advance, at the time of implementation in line with economic, practical, reasonable, reliable principle to configure system hardware and software, and the configuration of hardware and software should be modular, open architecture for future expansion.
Second, the system description
1, design basis
GA/T75-94 of the security engineering process and requirements
GA/T74-94 of the security system common graphical symbols
GB50198-94 the code for civil closed circuit monitoring TV system engineering technology
JGJ/T16-92 the code for electrical design of civil buildings
The building weak current engineering design manual
2, design principles
In the design of the entire system, we are guided by advanced technology, systems, structure reasonable, mainstream product, low cost, low maintenance as the starting point.
A, technology advancement: selection and configuration of hardware and software equipment of the entire system are in line with the trend of high-tech, key digital video, compression, decompression, stream, transmit using engineering technologies and products are widely used in the construction. In the premise of meeting the functional and system design is advanced, and maintain advanced for some time in the future.
B, structure reasonable: using advanced technology to structure each subsystem is stable and reliable system so that it can run safely and smoothly, effectively eliminate possible bottlenecks of each subsystem, use suitable equipment to ensure that the subsystem has good scalability. Stability and security is what we are most concerned about the issue, only system to ensure that all equipment is functioning only good data sharing, real-time failover, to form a complete management system such as real-time backups.
C, mainstream products: equipment selection, based on the actual situation of the city combined with the current high market share in China of all kinds of products with the best price-performance ratio and expansion capabilities of the product.
D, low cost, low maintenance: the design system and product should be simple, practical, easy to operate, easy to maintain. Easy operation and ease of maintenance of the system is to ensure that non-computer professionals use this system conditions.
E, centralized management: front end equipment, focused on the center of each subsystem controls, implemented on all remote control devices, settings, to ensure that the system is efficient, orderly and reliable discharge its administrative functions.
Third, the system design
CCTV's main function is to monitor the actual scene. It managers can observe all important stations in the control room, will monitor the area to transfer images in real time to the Management Center, officer on duty by the master monitor can be kept informed of these important places.
Structure of closed-circuit television monitoring systems can be divided into: camera, transmission, control and display a record four points. Relationships between the parts shown in the following figure.
Camera parts: is installed on a site, including cameras, lenses, shield, bracket and electric yuntai. Its task is to the subject to camera, and receive optical signals into electrical signals.
Transmission: transmit electrical signals from cameras to control room scene, it includes cable, line drives, and so on.
Displaying and recording part: image on the monitor converts the electrical signals coming from the site displayed on the device, and image can be saved with a DVR, so it includes the monitor, hard disk recorders and other equipment.
Control section: responsible for the control of all equipment and image processing. Between the input and output with videos
Switching devices (video matrix): responsible for switching video signals.
(1) front end equipment are: fastball, camera, lens and hood, decoder, etc.
(2) transport equipment: cable for video transmission, control, transmission lines, junction boxes, etc.
(3) recording equipment: master monitor, printer, and so on.
(4) control devices are: hard disk recorders, control software, and so on.
1, point distribution
A government building security video surveillance project at junctions, the corridor, the door, at an important place to install surveillance cameras. Key monitoring sites, the need for dynamic monitoring. For general monitoring, using a high-resolution color camera.
According to the regional environment, the programme designed monitoring points with a total of 19, located in key sectors, exports and other monitoring center located on the eight floor monitoring center, in order to ensure the quality of video transmission, will front the acquisition of video signals through the optical transmitter and receiver to the monitoring center, use MPEG4 DVR and record and control matrix.
2, description of the connection
Access trunk optical cable monitoring point, consider multiplexing of video channels, as well as the need to control the transmission of data to configuration of optical transceiver.
3, front-end monitoring configuration
For dynamic outdoor surveillance, selection of high speed dome camera, with 128 preset scenes, the built-in alarm input/output, ultra precision positioning precision of sampling, control, quiet operation, 485 connectivity, and built-in support for integrated high definition color camera lens preset position menu and camera control dual function. Outdoor pool wall mode can be used in order to monitor regional mobile monitor, for reaching the large scale monitoring purposes, or lifting the ball on to the pole. Static camera uses CNB-B2310P IR waterproof camera, image output quality is high, with more than 550 lines of horizontal resolution and high signal to noise ratio greater than 48dB. DC 12V power supply, has good power protection, greatly facilitates your selection and use.