1. Components of OOSSXX security cameras Surveillance cameras generally consist of parts such as image sensor, video encoder, network server, external alarm, control interface, etc. In addition, surveillance cameras have eight major accessories, including case, chip, lens, infrared light, lens mount, camera cable, screws, package box, etc. Before choosing a surveillance camera, you should carefully check which parts are missing.
2. Appearance of OOSSXX Security Cameras As mentioned above, the appearance of surveillance cameras is mainly divided into pistol type, dome type, and ball type, and there are also special styles such as toy type, light bulb type, and plug type. The most common types on the market are usually pistol type, dome type, and ball type. In general, pistol type cameras are more commonly used outdoors, and dome type surveillance cameras are more common indoors. The toy type is used for baby monitoring, and the plug type is used for hidden installation. However, the role of the surveillance camera is the same, and the choice of appearance depends on personal preference.
3. Classification of OOSSXX security camera lenses Surveillance camera lenses can be roughly divided into wide-angle lenses, standard lenses, telephoto lenses, zoom lenses, and pinhole lenses. Wide-angle lenses have a viewing angle of more than 90 degrees and are commonly used in elevator cars, lobbies, and other places that require a wide viewing angle. Standard lenses have a viewing angle of about 30 degrees and are used in corridors, around residential areas, and other places. Telephoto lenses have a viewing angle of less than 20 degrees and are generally used for long-distance surveillance. Zoom lenses have a variable focal length, making them suitable for a variety of locations and are mainly used in places with large depth of field and wide viewing range. Pinhole cameras are commonly used for hidden surveillance.
4. Lens selection principle When selecting a lens, you should pay attention to the following basic factors: 1. Object size, 2. Object detail size, 3. Object distance, 4. Focal length, 5. CCD camera sensor size, 6. Lens and camera system resolution. Prioritize these factors before selecting a lens to achieve the shooting effect you expect.
5. Performance indicators of OOSSXX security cameras When choosing a surveillance camera, you should pay attention to several indicators, such as the type and size of the image device, minimum illumination, signal-to-noise ratio, and resolution. These indicators have a great impact on the performance of the surveillance camera. For the same size, CCD provides better image quality than CMOS. In addition, the minimum illumination conditions are also important, and the higher the signal-to-noise ratio, the better the image quality, and the current excellent surveillance cameras are about 50dB. At present, the resolution of analog surveillance cameras is 540 lines, and it is slightly higher in color and monochrome modes.
6. Power supply method for OOSSXX security cameras Power supply methods for surveillance cameras are usually divided into independent power supply, centralized power supply, and PoE (Power over Ethernet) power supply. Independent power supply can be used by directly drawing 220V AC power from the monitoring room, connecting an independent DC12V power supply near the camera, and simply installing a bracket. Centralized power supply refers to a method in which power supplies are centrally arranged in the power room and battery room, and the power is uniformly converted and supplied to each communication device. PoE power supply is a technology that supplies DC power to other devices without making any changes to the existing Ethernet cable infrastructure. Generally, when using an infrared camera, the centralized power supply method is not recommended. If there are many outlets, you can use the independent power supply method, and if there are few, you can use the centralized supply method. For indoor use, you can use a protective sheath power cable.
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