How to choose security surveillance camera

Introduction: In the development of high technology on the Internet and the improvement of people’s living standards, video surveillance applications have also become widespread. From the early single engineering to the diversification, especially the civil security, which is getting more and more attention, will become Video Surveillance Security is the new area with the greatest potential for development. So how to choose a high-tech security surveillance camera?

The security monitoring camera is the core equipment of the entire monitoring system. When selecting the model, it should be carefully selected according to the site environment and the user's needs.

1. Select according to the requirements for image clarity. If the resolution of the image quality is higher, a surveillance camera with a higher TV line indicator should be used. In general, for color surveillance cameras, 420, 450 TVL (television line) are for the resolution of the surveillance camera, 470TVL above are all high-resolution surveillance cameras. The higher the sharpness, the higher the price.

2. Select according to ambient light. If the lighting conditions are not ideal, try to use a lower-illumination surveillance camera, such as a color surveillance camera, a color black and white automatic conversion dual-purpose surveillance camera, a low-illumination black and white surveillance camera, etc. to achieve better results. It should be noted that if the illumination of the light is not high and the user has a high requirement for the intelligibility of the monitoring image, a black and white camera should be selected. If there is no light, you must add infrared lights to provide lighting or use surveillance cameras with infrared night vision, such as SANNO's SN-350CWH or SN-350CW surveillance camera, which is characterized by: the surveillance camera itself has a color black and white conversion mode, since With lens and mounting bracket, unique vacuum packaging design, no need to install protective cover when used indoors, and beautiful appearance, good concealment, excellent cost performance.

3. Select according to the installation location. Due to the common type of surveillance camera, it can be installed either wall-mounted or ceiling-mounted, so indoor and outdoor are not limited, and the hemispherical surveillance camera is more flexible. It can only be installed by ceiling, so it is used indoors and the installation height is limited. However, compared with the * type camera, it does not need to be equipped with a lens, protective cover, bracket, easy installation, beautiful hidden, and the price is economical.

4. Select according to the installation method. Such as fixed installation, surveillance cameras use common * type surveillance cameras or dome surveillance cameras such as the use of PTZ installation methods, are now more integrated selection of surveillance cameras, such as SANNO's SN-220C, features: built-in motorized zoom lens, small and beautiful, Easy to install, cost-effective, you can also use the ordinary * type surveillance camera with a power zoom lens, but the price is relatively high, the installation is not easy and integrated surveillance camera.

5. Also pay attention to some performance indicators on the product description. Such as SNR, auto iris lens drive and so on. The signal-to-noise ratio of the general TV monitoring system must be greater than 48dB, which not only meets the requirements of the industry standard of not less than 38dB. More importantly, when the ambient illumination is insufficient, the higher the S/N ratio, the more the surveillance camera image becomes. Clear. The drive mode of the lens is generally dual-drive, so that you can use the DC or video-driven auto iris lens.

6. In addition, security surveillance camera installation is more cautious. Strictly follow the product instructions for proper operation, such as operating temperature, power supply voltage, etc. The majority of surveillance camera manufacturer's temperature index is -10 ~ +50 °C, such as the use of the area temperature and humidity changes should be added special protection. As the domestic surveillance camera AC voltage adaptation range is generally 200 ~ 240V, anti-power voltage change ability is weak, when used in the system need to add regulated power supply.

Indoor installation: Most of the traditional methods are to install the surveillance camera at the entrance of the building indoors. The advantage of this method is that it can choose to monitor the direction of installation (in the same building building should consider the consistency of the monitoring direction and closed, to ensure that any one into the building staff can leave the front at the entrance to the front of the image). At the same time, this method is easy to install, wiring is simple and easy to maintain. It should be noted that the influence of the outdoor light source on the surveillance camera should be taken into account in the selection and installation position of the surveillance camera. If the surveillance camera's field of view is facing the outside, you must choose a surveillance camera with automatic aperture and strong backlight compensation. For the entrance and exit of a complex lighting environment, a wide dynamic camera, a light suppression monitor camera, or even a supplemental light source should be used.

Outdoor installation: install surveillance cameras with outdoor poles or attached carriers, and use the front camera or side camera to shoot the entrance and exit images. This method has gradually been accepted and adopted, and achieved better imaging results. The advantage of this method is that the daytime outdoor natural light environment is full of face and face lighting, real facial images, distinct layers, and can capture more details of human body features. In the evening, the environment of the entrances and exits is single, and satisfactory night portraits can be obtained even when the ambient lighting is sufficient. This kind of installation method can select low-lightness surveillance camera or general illumination surveillance camera according to the ambient illumination conditions at night. The disadvantage of this installation method is that the installation location is limited by the landscape, the wiring is slightly troublesome, some projects need to involve the cutting of the road surface, and the outdoor landscape environment needs to be considered. Some construction entrances and exits can not be chosen this way due to environmental restrictions.

Through the above analysis, under the circumstance that the built environment allows, it is recommended to choose the outdoor installation mode preferentially, and at the same time, to make the outdoor lighting at night entrances and exits.