When communicating with customers, I often recommend that customers should not be less than 2.5m indoors and 3.5m outdoors. Although these figures are simple, they take into account the indoor height and the angle of lens pressing down, as well as the length of exposure during outdoor installation and the factors to prevent man-made damage.
When installing cameras, there are two options: wall installation and hoisting. There are many hoisting in indoor environments such as supermarkets, and wall installation is generally selected outdoors. Generally, lighter machines can use ordinary supports, but when using heavier machines, it is recommended that customers use supports with large load-bearing. We must consider the load-bearing of the camera to prevent the camera from tilting or falling over a long time.
The choice of machines should be different for different environments.
For example, indoor coffee shops, boutiques, hotels and other well decorated environments should consider hemispherical cameras for beauty, which is more beautiful.
However, although some grain and oil stores, hardware stores and hot pot stores are also indoors, guns have to be selected, which can effectively prevent dust, water vapor and oil fume from entering the machine and affecting the use of the machine.
For the outdoor environment, of course, the gun machine and ball machine can highlight their powerful defense function, and their normal function can be ensured in windy and rainy days.
In terms of the use of power supply, I personally recommend that any machine should use foot safety power supply. The price is a little high, but this kind of power supply is stable and there are few after-sales problems.
The camera should pay attention to the irradiation angle of the machine after the image is produced. Some customers look very good during the day after installation. At night, the picture will be dark, half white and generally black, bright in the middle and black around. These are related to the angle. We should avoid raising the lens too high during installation. For wall mounted machines, more than 1 / 4 of the white wall should not appear in the picture, and the lens should be selected appropriately (for example, 3.6mm and 4mm irradiate 6-8m, 6mm is suitable for 12-14m, and 8mm is suitable for 20-30m). If you really can't remember how to choose a lens, here's a simple way to teach you how to choose a lens by multiplying the number of millimeters of the lens by 2, and then make a specific analysis according to the specific problems of the environment. Generally, the effect of the front end is not bad.
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