What does monitoring consist of, and what are the components of a monitoring system?

A complete monitoring system consists of the following parts:

Civil monitoring 1 (1 hard disk video recorder, several surveillance lenses, several meters of coaxial cable, several monitoring lens brackets, several monitoring power supplies, a hard disk of appropriate capacity, and a monitor).

Civil monitoring 2 (1 hard disk video recorder, several surveillance lenses, several meters of coaxial cable, several monitoring lens brackets, several monitoring power supplies, a hard disk of appropriate capacity, a monitor, 1 PTZ controller, and a number of PTZ).

Medium and large unit monitoring (1 hard disk video recorder, several monitoring lenses, several meters of coaxial ** line, several monitoring lens brackets, several monitoring power supplies, a hard disk of appropriate capacity, a monitor, a number of PTZ controllers, a number of PTZ, 1 monitoring console, 1 matrix machine, 1 server).

The monitoring system is different depending on the use of the occasion and the need for it, mainly as follows:

2. Camera, optical transceiver, optical cable, optical transceiver, hard disk video recorder, display (for fixed monitoring above 200 meters).

For activity monitoring within 200 meters).

4. Camera, PTZ, PTZ controller (decoder), optical transceiver, optical cable, optical transceiver, hard disk video recorder, display.

for activity monitoring above 200 meters).

5. Camera: PTZ, PTZ controller (decoder), wireless transmitter, wireless receiver, DVR display.

for wireless surveillance).

If you want to monitor the network, connect the server from the DVR with a network cable to the computer host monitor.

A typical closed-circuit surveillance system is mainly composed of four parts: the camera part, the transmission part, the control and recording part, and the display part.

First, the camera part is the leading part of the TV monitoring system, and it is the "eye" of the whole system.

When the area of the monitored place is large, a zoom lens is installed on the camera to make the distance that the camera can observe farther and clearer; The camera can also be installed on the motorized gimbal, which can make the gimbal drive the camera to rotate horizontally and vertically, so that the camera can cover a larger angle.

In some cases, especially in the case of outdoor applications, in order to prevent dust, rain, high and low temperatures, corrosion, etc., special protective covers should be installed for the camera and its lens, and even corresponding protective measures should be taken for the PTZ.

Second, the transmission part is the image signal path of the system.

Generally speaking, the transmission part refers only to the transmission of images and sound signals. At the same time, because the control center needs to control the camera, lens, PTZ, etc. through the console, the transmission system also contains the transmission of control signals.

In terms of transmission mode, the short distance is generally transmitted by ** line, the distance of no more than one or two kilometers is generally transmitted by twisted pair, and the longer distance can be transmitted by optical fiber. For long-distance transmission, it is also necessary to be equipped with first-class signal amplification, image signal correction and compensation equipment.

Third, the control and recording part is responsible for the control of the camera and its auxiliary components (such as lenses, PTZ), and the recording of images and sound signals.

At present, the technology of DVR has developed more perfectly, it can not only record images and sounds, but also includes functions such as screen splitting and switching, PTZ lens control, etc., which basically replaces the screen switcher, screen splitter, PTZ controller, lens controller and other products used in the past. If the customer requires very convenient control of the gimbal, lens (especially the high-speed dome), the control keyboard can be added.

Fourth, the display part is generally composed of several or more monitors.

In the case that the number of cameras is not very large and the requirements are not very high, the monitor can be directly connected to the DVR. If there are a large number of cameras and multiple monitors are required to switch and display the picture in a complex way, it must be equipped with a "matrix" to achieve this.

Dedicated monitors** are more expensive and can be replaced with regular TVs to save money. Compose.

1. Front-end part: the front-end completes the shooting of analog **, the generation of detector alarm signals, the control of PTZ and protective cover, and the output of collapse alarm. It mainly includes cameras, motorized zoom lenses, outdoor infrared radiation detectors, dual monitoring detectors, temperature and humidity sensors, PTZ, protective covers, decoders, police lights, sirens and other equipment.

2. Transmission part: mainly composed of coaxial cable. The transmission part requires real-time transmission of the image recorded by the front-end camera, and at the same time requires the transmission to have low loss, reliable transmission quality, and the image can be clearly restored and displayed in the video control center.

3 .Control part: This part is the core of the security monitoring system, which completes the digital acquisition of analog monitoring signals, monitoring data recording and retrieval, hard disk recording and other functions. The control part is the key part to realize the linkage between the alarm and the video recording.

4. Video wall display part: This part completes the real-time monitoring signal display and video content playback and retrieval on the system display or monitor screen. The system supports multi-screen playback, simultaneous recording of all channels, system alarm screen, sound prompt and other functions.

The TV monitoring system is composed of five parts: front-end monitoring equipment, transmission equipment, back-end storage, control and display equipment.

The back-end equipment can be further divided into central control equipment and sub-control equipment. There are many ways to construct front-end and back-end equipment, and the connection between them can be achieved through cable, optical fiber, microwave and other ways.

Front-end surveillance equipment camera with advanced charge-coupled device CCD image sensing technology. With auto-iris interface, auto white balance, electronic shutter, illuminance requirements, backlight compensation, standard definition or high resolution, the camera is suitable for a variety of occasions for users to choose.

The sequential audio switcher of terminal monitoring equipment can switch the camera images and the corresponding audio signals from 2 to 12 channels in order, and the timing switching image signals are automatically displayed in order on the monitor, and the switching time can be adjusted. It is also possible to manually switch between selection or bypass to isolate the image display of a specified camera.

Camera: The surveillance camera can convert the image collected by the camera into a transmittable signal and transmit it to the display device;

Gimbal: A stabilizer for the camera, which plays a role in balance and stability;

PTZ controller (decoder): PTZ decoder is a device that converts digital signals that control camera lenses and PTZ functions into electrical signals that can be controlled;

Optical transceiver: Optical transceiver is the terminal equipment for optical signal transmission. Optical transceiver is an optical fiber communication equipment that extends data transmission, which mainly uses signal modulation, photoelectric conversion and other technologies to achieve the purpose of remote transmission by using optical transmission characteristics.

Optical cable: Optical cable is a communication line in which a certain number of optical fibers are composed of a cable core in a certain way, and are sheathed to realize optical signal transmission;

Monitors: Monitors are also commonly referred to as monitors. A monitor is an IO device that belongs to a computer, i.e., an input and output device. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects it to the human eye.