The rapid development of society, people are no longer more confined to the inside like before, many people like to go out for travel, shopping, and even live in the field for some time, so that the requirements for home security have further improved. The home security monitoring system is generated according to the demand, it can monitor the situation of their own family anytime, anywhere. The following small series for everyone to introduce security monitoring knowledge and security monitoring system has those characteristics related to knowledge.
Security camera lens selection:
1, in the elevator car, small room and other sight distance within 3 meters, the required angle of view to reach 90 degrees and other wide-angle requirements of the place, you can choose 2.8MM \ 2.5MM and other wide-angle lenses, but note that this type of angle lens edge is not available The obvious distortion will be avoided, and the brightness and sharpness of the edges will also be lower when the IR is matched.
2, for most of the rooms, offices and other places, sight distance of about 3-5 meters, the required viewing angle of about 60 degrees, you can choose 3.6MM or 4MM lens. Need for higher definition lenses with longer focal lengths.
3, if the viewing distance is about 5-10 meters, the required viewing angle is about 45 degrees, you can choose 6MM or 8MM lens. If the viewing distance reaches 20 meters, the required viewing angle is about 30 degrees, you can choose 12MM or 16MM lens.
4, if the viewing distance of 30 meters or more, the required viewing angle is about 15 degrees, you can choose 25MM or longer focal length lens.
Security monitoring camera installation:
Some notes about the installation of surveillance cameras:
1, to avoid back light installation: any strong light directly to the lens mounting position, are not suitable, the scene of the light is from west to west, then the camera should also be installed in the east, looking west.
2. If it is not really a very wide dynamic camera, it is necessary to avoid a camera at the same time to see where the light and darkness gap is too large, such as the environment with direct sunlight and the environment of indoor lighting. Of course, the world wide camera has standard wide dynamic features.
3, the installation of the camera, it should be high after the front low, which is the end of the lens, should be a few centimeters lower than the rear end of the camera signal output. At the same time, the rainproof cover of the infrared camera should not protrude beyond the edge of the lens too much, otherwise it may cause the eyes to have an aperture, a halo at night, noise, the image does not clear out, anti-white phenomenon.
What are the characteristics of security monitoring system?
1, can be imaging day and night: with night vision function, can monitor day and night;
2. One screen and multiple screens: You can view multiple camera real-time monitoring screens at the same time;
3, can be remotely monitored: go out, only where the network can be remotely monitored;
4, historical inquiries: After a period of time can also be transferred to the monitoring screen, call the screen length of time depends on the size of the hard disk;
5, smoke sense monitoring: the use of smoke sensors to monitor the situation of the smoke, prevent fire;
6, gas monitoring: the use of gas sensors to monitor gas leaks, prevent leaks to avoid fire;
7. Alarm linkage: abnormal conditions can be linked with the alarm system.
Editor's summary: The above is Xiaobian's knowledge on security monitoring and security monitoring system with those features related to the introduction, more practical knowledge, please pay attention to Qijia information.
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