What are the basic requirements for the content of each project of CCTV monitoring system project?

CCTV monitoring system is a cross-industry comprehensive security system, the system uses the world's most advanced sensing technology, surveillance camera technology, communication technology and computer technology, forming a multi-functional all-round monitoring of the highly intelligent processing system. CCTV monitoring system because it can give people the most direct visual and auditory experience, as well as the visibility, real-time and objective recording of the monitored object.

Compose. A complete CCTV monitoring system is mainly composed of front-end audio data acquisition equipment, transmission medium, terminal monitoring equipment and control equipment. Real-time monitoring of the monitored area is carried out by installing fixed cameras or omnidirectional cameras in the monitoring area.

The signal collected by the camera is transmitted to the image distributor or amplifier through the transmission line, and then to the monitor, so as to achieve comprehensive monitoring of the monitoring area.

Front-end equipment: refers to the device that collects audio information at the front-end of the system. The operator obtains the necessary sounds, images, alarms and other information to be monitored through the front-end device. The front-end equipment of the system mainly includes cameras, lenses, PTZ, decoding controllers, and alarm detectors.

Transmission medium: It is a transmission channel that transmits the information collected by the front-end equipment to the control equipment and the terminal equipment. Mainly including the first line, power line and signal line, generally speaking, the first signal is transmitted by coaxial cable, and can also be transmitted by optical fiber, microwave, twisted pair and other media.

Control equipment: It is the most important part of the whole system, and it plays the role of coordinating the operation of the whole system. It is by controlling the device that people get the monitoring functions they need.

Terminal equipment: It is a device that is displayed in various ways after the system synthesizes the obtained sound, image, alarm and other information. The system provides people with the most direct visual and auditory experience, as well as the visibility, real-time and objective records provided by the monitored object through the display of terminal equipment.

The system terminal equipment mainly includes monitors, video recorders, etc.

CCTV monitoring system is the application of optical fiber, coaxial cable, microwave in its closed loop to transmit TV signals, and from the camera to the image display to form an independent and complete TV system. It can reflect the monitored object in real time, vividly and truly, not only greatly prolongs the observation distance of the human eye, but also expands the function of the human eye, it can replace manual monitoring for a long time in a harsh environment, so that people can see everything that actually happens at the monitored scene, and record it through video.

1.Composition of CCTV surveillance system.

1) Center-level equipment. The center-level equipment can meet the requirements of the control center driving management personnel (driving dispatcher, environmental adjustment and maintenance adjustment), and the main equipment is the best decoding equipment, digital hard disk video recorder, central network management terminal, central control panel and monitor, which can ensure that each user has a set of independent equipment and does not interfere with each other.

2) Station-level equipment. Station-level equipment can meet the value requirements of station staff and train drivers, and its main equipment is more pressing, station control panel tax monitor, digital transmission equipment for viewing mode moment reduction, regulation and insertion of person splitter, video period average street amplifier, digital hard disk recorder and other equipment.

1.Composition of CCTV surveillance system.

1) Center-level equipment. The main equipment is the first decoding equipment, digital hard disk video recorder, central network management terminal, central control panel and monitor, which can ensure that each user has a set of independent equipment and does not interfere with each other.

2) Station-level equipment. Station-level equipment can meet the requirements of station staff and train drivers, and its main equipment is more pressing, station control panel tax monitor, digital transmission equipment for viewing mode moment reduction, regulation inserter trouser mold device, video period average street amplifier, digital hard disk recorder and other equipment.

Answer]: B, D

Basis: Article 1 and Article of the Code for Electrical Design of Civil Buildings (JGJ16 2008), and Article 1 of the Code for Engineering Design of Circular Fiber Combined with the Code for the Engineering Design of the Monitoring System for Security and Rent Prevention System (GB50395 2007).

1.Camera: In the system, the camera is at the forefront of the system, it converts the light image of the object into an electrical signal - ** signal, providing a signal source for the system, so it is one of the most important devices in the system.

2.Camera lens: the function of the camera optical lens is to focus the light image of the observed target on the CCD sensor device, the image produced on the sensor device will be the inverted image of the object, although the above purpose can be achieved with a simple convex lens, but the image quality at this time is not high, can not obtain a clear image in the center and the edge, for this reason a number of lens elements are often attached, form a composite lens, can get a satisfactory image.

3.Gimbal: It can be used with the camera to achieve the purpose of turning up, down, left and right.

Expanding the monitoring range of a camera, and at the same time being able to track the target and take pictures within a certain range, improves the practical value of the camera. Due to the different use environments, there are many types of gimbals.

4.Protective cover (dust cover) and bracket, decoder: The purpose of the dust cover is to protect the camera and lens from environmental conditions such as harmful gases, large dust, and intentional vandalism.

The decoder is used to complete the bus control of the camera lens and the pan tilt in all aspects.

The bracket is used as a support when the camera is installed and attaches the camera to the auxiliary device at the mounting site.

5.Monitor: A monitor is a terminal display device for a TV monitoring system. The state of the entire system is ultimately reflected on the monitored screen. The quality of the monitor directly affects the final effect of the whole system.

6.Signal transmission: When the monitoring site is close to the control center, the first image is used, and the control signal is directly transmitted, and when the distance is far, radio frequency, microwave, or optical fiber transmission is adopted.

Commonly used equipment are: coaxial cable, twisted pair, optical fiber. The transmission distance increases from near to far.

7.Control center control equipment and monitoring equipment: (1) Signal distribution amplifier; (2) Matrix (**Signal Switcher); 3) Terminal controller (operation keyboard); 4) Alarm Extension Printer.

5) Character generator, elevator floor superimposed display; 6) terminal decoder; (7) terminal controller; (8) Multiviewer;

Composition of the CCTV system:

In a nutshell, it consists of a front-end, a transmission, and a terminal.

1) Front-end: used to obtain images of the monitored area.

It is generally composed of a camera and lens, a gimbal, an encoder, a dust cover, etc.

It generally includes monitors, various control equipment, and recording equipment.