Computer network is the combination of computer technology and communication technology, and it is also one of the fastest developing, most widely used and most influential technologies in recent years. The pace of the times has entered a glorious 2 1 century. The technology of automatic control system of construction equipment is becoming the cornerstone of social informatization and developing rapidly. It has penetrated into all aspects of social information network and brought great convenience to people's work and daily life.
The automatic control system of building equipment uses modern control components and equipment to query the environment that people can't see in real time, and transmit all the important scenes in the building to one or more monitoring rooms of the monitoring system for display, so as to observe and understand the disaster situation in time, monitor the theft and record the theft and related violent crimes under unattended conditions.
System design scheme
The whole video security monitoring and alarm system consists of special circuits with different functions-camera part (equipped with alarm detectors, pickups and other components as needed), transmission part, display, recorder and so on. Each part has related components and equipment to complete different combined functions, which we will introduce in detail below:
First, the camera part-the camera is the front end of the video security monitoring and alarm system and the "eye" of the whole system. Many cameras are arranged and installed in specific positions of the monitored places, so that their fields of vision can cover every part of the whole video security monitoring system. Sometimes, due to the large area of the monitored place, in order to save the capital investment of the whole video security monitoring system and simplify the transmission system, control system and display system, the camera with variable focal length (zoom) lens is selected and installed on the electric pan/tilt. Under the control of the controller, the pan-tilt can easily drive the camera to rotate in the horizontal and vertical directions, so that the camera can realize a large viewing angle and a large visual area.
Because the camera is the eye of the video security monitoring system, it can turn the monitored content into an image signal and transmit it to the display of the control center for people to observe.
Design category of protection point:
1. If a ceiling integrated camera is installed in the center of the hall of a building, it will install the camera, lens, pan/tilt, decoder and other components in a hemispherical protective cover, and its appearance will be elegant and decent. After installation, it can rotate 360 degrees horizontally and 90 degrees vertically. If a camera with a six-by-three variable lens can zoom in and out, people's activities in the hall can be clearly observed-at a glance.
In addition, if there is a pinhole camera in the elevator of this building, it is hidden.
Very good, it can be easily connected with the floor display, so that the actual situation of people entering and leaving the elevator can be observed and recorded correctly and clearly.
3. A ceiling-mounted integrated camera with low illumination can be installed in the conventional passage of the building, and people's faces and related activities in the passage of the building can be clearly seen under the condition of relatively dim light. Because of its hidden characteristics, it does not affect the beautiful and generous layout of the building.
4. Around the building and in the green belt of residential area, several outdoor dynamic scenic spots can be installed according to the actual situation, and the applied components are all outdoor omni-directional cameras, three variable lenses, pan/tilt, decoders, protective covers, etc. In this way, relevant personnel entering and leaving the building can observe and record it. Readers must pay attention to the parking lot, especially the key prevention areas.
Through this layout, all the areas around the building and every corner inside the building are under perfect control, and all kinds of activities can be observed (if necessary, you can also call the video materials saved by the video recorder for inquiry).
Second, the control part-the control part is the functional command center of the full video security monitoring and alarm system, and it is the brain and heart of the whole system. The control part is mainly composed of the general console and related control components. The main functions of the main console are-
1, video signal amplification and distribution
2. Switching and distribution of image signals
3. Correction and compensation of image signals
4. Recording of image signals, etc.
5. Camera, electric zoom lens, pan/tilt remote controller (comprehensively and carefully monitor and track the monitored scenic spots).
6. Deploy and remove the protection area of the entire video security monitoring and alarm system.
7. When there is illegal invasion in the monitoring area, the alarm signal is transmitted to the general console, and the display shows the alarm area, linkage alarm, video recorder, front light and flashing light.
Third, the transmission part-the transmission part is the transmission path of image signals, sound signals, control signals and other signals of the complete video security monitoring and alarm system. At present, many projects in video security monitoring and alarm system adopt video baseband transmission mode. If the camera is far away from the main console, optical fiber transmission or radio frequency transmission can be used. Because the area of conventional building equipment automatic control system is not very large, there are many ways of video baseband transmission-using 75 ohm video coaxial cable. The key requirement for the application of this video baseband transmission mode is that after the image signal reappears on the display through the transmission system of 75 ohm video coaxial cable, there is no obvious distortion between the chroma signal and the brightness signal, and there is no obvious noise at the same time, so as to ensure that the clarity and gray level of the image signal output by the camera are not obviously reduced.
Fourth, the display and transmission signal recording part-this part usually consists of multi-monitors, long-delay video recorders and other equipment. In the "all-video security monitoring and alarm system", generally, one video monitoring monitor is not used to display corresponding to one framing camera, but the image signals sent by multiple cameras are synthesized and displayed on a large-screen video monitoring monitor through a frame splitter, and the screen is divided into several small pictures with equal areas, such as four pictures, nine pictures and sixteen pictures. Each thumbnail shows an image signal sent by a camera, and then several images are recorded by a long-delay video recorder for future reference.
The application of security technology in security precautions must have a deterrent effect on criminals and make them afraid to commit crimes easily; In case of invasion, theft and other criminal activities, the video security monitoring and alarm system can find and alarm in time, and the video security monitoring and alarm system can automatically record the crime scene and criminal process, so as to solve the case in time and save a lot of manpower and material resources. According to the requirements of high-quality residential quarters and high-standard and high-quality application standards, we fully embody ...
Network design requirements of intelligent building
The development, design and construction of intelligent residential quarters must make full use of modern electronic information technology, computer technology and high-tech communication technology to realize the organic combination and automation of equipment, communication, office and automatic control in buildings. The design of intelligent Zhong Da consulting network should integrate multi-disciplines and technologies to provide a safe, efficient, comfortable and convenient living and office environment for residential quarters and buildings. Therefore, we should focus on building (or community) equipment automation system-BAS (Building Automation System), communication automation system-CAS (Communication Automation System) and office automation system-OAS (Office Automation System), and make full use of modern communication technology and integrated wiring system to realize intelligent management.
First, the management system of intelligent residential buildings-the overall scheme design must be completed in a comprehensive, comprehensive, advanced and optimized way. The integrated wiring of the whole system and the cable laying of many automatic communication network engineering systems should be embedded synchronously with civil engineering.
Second, the design of intelligent management module system-fully consider the modularity, stability and security of application system and automatic control equipment. Special attention should be paid to the combination of advanced, innovative and practical functions, as well as the efficient optimization of systems and automatic control equipment. On the premise of establishing and perfecting the network structure and comprehensive wiring, according to the actual economic ability of residents and the principle of gradual implementation by stages, the main equipment, key components and terminal control facilities of the whole intelligent management system are installed, debugged and operated.
Thirdly, the application of modern communication engineering technology and computer network system can realize highly perfect automatic management, effectively control the equipment in residential buildings-air conditioning, HVAC, lighting, power supply and distribution, fire fighting, video monitoring, water supply and drainage facilities, parking lot, access control, emergency generator, UPS power supply, computer center equipment and other system facilities, and at the same time generate and provide related equipment operation, maintenance plan, fault handling parameters, as well as property management and related expense settlement.
Hou Yu
The rapid development of network monitoring system has made remarkable achievements, among which the most concerned is network communication technology, such as the development of data network, the wide application of local area network, the popularization of digital network ISDN, the practical development of ATM technology and broadband ISDN and so on. Communication network technology is a complex large-scale system. The reliability and efficiency of monitoring system put forward high quality requirements for network communication, and network management is a technology developed to meet this demand.
In the early days of network monitoring system technology, communication network management refers to monitoring and control. In recent years, due to the development of computer network technology, communication network management has been extended to all aspects of daily maintenance and normal operation of communication networks. The development of communication network management technology and the strengthening of network management work are just to adapt to the rapid development of security video surveillance system technology.
With the development of network monitoring system technology, both the operation management platform of the main control room and the sub-controller of the auxiliary control room hope to observe the general situation, equipment composition and system operation of the video monitoring system network through the monitoring display, which requires a set of software system with monitoring function to monitor, control and manage the security video monitoring system network. The main task of network management is to collect the working parameters and working status information of various devices and components (cameras, decoders, pan/tilt, sensor detectors, alarms, etc.) in the network. ), provided to the network operators in the main and auxiliary control rooms, and accepted by the network operators or microcomputer management programs to manage and deal with various control elements. Ensure that the network equipment and components of the network monitoring system work normally according to the requirements of the management system software.
The whole process of network management of network monitoring system is essentially a complete process of monitoring microcomputer processing information. It describes the parameter state of network equipment through standardized data format, and then calculates according to a certain mathematical model on the computer platform, displays the calculation results or outputs control data for correct processing, thus making the system work normally.
Computer network maintenance technology is the product of the combination of computer technology and communication technology, and it is also a new technology with the fastest development and the widest application in recent years, involving many topics. Limited by space, this paper can only introduce some conventional related knowledge to readers from one side.
For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd