The entire video surveillance system is divided into a front-end video capture device, a mid-end transmission processing device, and a back-end display viewing device. The analog camera we refer to is a front-end video capture device. The analog camera can convert the analog video signal generated by the video capture device into a digital signal and store it in the computer. The video signal captured by the analog camera must be converted to a digital mode by a specific video capture card and compressed before being converted to a computer for use.
This article refers to the address: http://
Analog camera classification
In the video surveillance system, the camera produced by the analog camera manufacturer is the most front-end, most basic, and the largest investment product, and the most critical device. It is responsible for imaging the surveillance area and converting it into an electrical signal for further transmission. Its quality directly affects the overall application of the video surveillance system, but also relates to the project cost. The camera can be classified in three ways.
Classified by color: divided into color and black and white cameras. Generally, black and white cameras are more sensitive than color. They are more suitable for use in places with insufficient light. If the purpose of use is to monitor the position and movement of the scene, black and white cameras can be used. The details of the object being photographed, such as the color of the clothes and the scene, are better in color.
According to the classification of photosensitive devices: divided into CMOS, CCD, and 3CCD. A CMOS image sensor, like a CCD, is a semiconductor that records light changes in a camera. Among the two image sensors, CCD is used earlier, and its technical maturity is also high. At present, analog camera manufacturers use CCD chips in most cases. 3CCD is a camera that uses three CCDs. The price of the 3CCD camera is much more expensive, and the lens size is also large. Currently, it is only applicable to the video surveillance field where imaging resolution is very high. In China's video surveillance camera market, the CCD market is mainly occupied by internationally renowned photosensitive device suppliers such as SONY and Sharp.
Classified according to the movement of the gimbal: it is divided into a gun camera, a dome camera, a dome camera, and the like. The dome camera features wide monitoring range and fast speed. It is mainly used for high-speed tracking of suspicious personnel and can be tracked in time. The dome camera is mainly used for elevators and indoor applications where the ceiling light does not change much. It belongs to the traditional camera and can be applied to any occasion indoors and outdoors, but it is not suitable for monitoring or installation.
Integrated pan/tilt and function, the camera is roughly divided into: gun, spherical camera, integrated camera, infrared day and night camera and so on.
Analog camera features produced by analog camera manufacturers
1, ease of use
Analog camera: closed circuit, can only be monitored inside, can not be monitored remotely,
2, practicality
Analog camera: Video data can only be stored locally or remotely, and is easily destroyed by illegal elements.
3. Integration
Analog camera: Analog camera and DVR (DigitalVideoRecorder means digital video recorder, if it is only literally understood, it does not indicate whether the recording medium is a tape or a hard disk.) Connected, the number of DVR channels is limited, after the DVR is full In addition to increasing the cost of the camera, it also increases the cost of hardware.
4, installation
Analog camera manufacturer's analog camera: Connect the coaxial cable to each camera and connect it to the control platform, video equipment, and display device.
Every additional route must be re-routed and no off-the-shelf network is available.
5, remote
Analog cameras produced by analog camera manufacturers: can only be viewed locally for management.
6, scalability
Analog cameras: It is very difficult to expand the work. Each analog camera requires a dedicated cable, which affects the image quality when using long cables.
7, cost
Analog cameras produced by analog camera manufacturers: Coaxial cables are very expensive, and the standard coaxial cables of the commonly used RG59750hms are 30% to 40% more expensive than high-quality network cables. Each analog camera requires a cable, and if there are many cameras, you must purchase a lot of morning cables and pay for the installation and deployment of these cables. Manpower and maintenance costs are high, and system construction costs will also include the cost of analog cameras, video recorders and videotapes.
72V 60Ah Power Battery,Portable Energy Battery,Electric Mobility Battery,Energy Storage System
Sichuan Liwang New Energy Technology Co. , https://www.myliwang.com