Security monitoring knowledge, what are the characteristics of the security monitoring system?
Security monitoring knowledge, what are the characteristics of the security monitoring system? With the rapid development of society, people are no longer confined to it as before. Many people like to travel, shop, and even live in other places for a period of time, so the requirements for family security have been further improved. And the home security monitoring system is produced in response to demand, it can monitor the situation of one's own family anytime and anywhere. Below, Chengdu Security will introduce you the knowledge of security monitoring and the relevant knowledge of the characteristics of the security monitoring system. The choice of camera lens for security monitoring: 1. In the elevator car, small room, etc., within the visual distance of 3 meters, where the viewing angle needs to reach 90 degrees and other wide-angle requirements, you can choose a wide-angle lens such as 2.8MM2.5MM, but pay attention to this type The edge of the angled lens will inevitably have obvious distortion, and when combined with infrared, the brightness and clarity of the edge will also be lower. 2. For most rooms, offices and other places, the viewing distance is about 3-5 meters, and the required viewing angle is about 60 degrees. You can choose a 3.6MM or 4MM lens. Need a higher-resolution lens with a longer focal length. 3. If the viewing distance is about 5-10 meters and the required viewing angle is about 45 degrees, you can choose a 6MM or 8MM lens. If the viewing distance reaches 20 meters, and the required viewing angle is about 30 degrees, you can choose a 12MM or 16MM lens. 4. If the viewing distance is more than 30 meters and the required viewing angle is about 15 degrees, you can choose a lens with a focal length of 25MM or longer. The installation of security surveillance cameras: several points to note about the installation of surveillance cameras: 1. Avoid backlight installation: any installation location where strong light directly hits the lens is not suitable. The light on site is from the east For the west, the camera should also be installed in the east, looking to the west. 2. If it is not a really ultra-wide dynamic camera, it is necessary to avoid a camera looking at a place where the difference between light and dark is too large at the same time, such as an environment with direct sunlight and indoor lighting at the same time. Of course, Tiandi Weiye cameras have standard wide dynamic functions. 3. The installation of the camera should be high in the back and low in the front, that is, the end of the lens should be several centimeters lower than the back end of the camera signal output. At the same time, the rainproof cover of the infrared camera should not protrude too far beyond the edge of the lens, otherwise it may cause the phenomenon of aperture, halo, hazy, unclear image analysis, and white reflection at night. What are the characteristics of the security monitoring system? 1. Day and night imaging: with night vision function, it can be monitored regardless of day or night; 2. One screen with multiple images: you can view the real-time monitoring images of multiple cameras at the same time; 3. Remote monitoring: away from home, only where there is a network You can remotely monitor; 4. Historical query: After a period of time, you can also call up the monitoring screen, and the length of time to call up the screen depends on the size of the hard disk; 5. Smoke monitoring: Use a smoke sensor to monitor smoke and prevent fires; 6. Gas monitoring: Use gas sensors to monitor gas leaks to prevent gas leaks and avoid fires; 7. Alarm linkage: In case of abnormal conditions, Chengdu Security can be linked with the alarm system.