[ Huaqiang Security Network News
] The protective cover is an important component in the monitoring system. It is a protective device that makes the camera work normally in the presence of dust, rain, high and low temperatures.
Protective covers are generally divided into two categories.
One type is an indoor protective cover, which is simple in structure and inexpensive. Its main function is to prevent the camera from falling ash and have certain security protection effects, such as anti-theft and anti-destruction.
The other type is an outdoor protective cover, which is generally an all-weather protective cover, that is, the camera installed in the protective cover can work normally regardless of wind, rain, snow, high temperature, low temperature and the like. Therefore, the protective cover has the functions of cooling, warming, rainproof, snowproof and the like. At the same time, in order to make the camera normally capture images in rainy and snowy weather, a controllable wiper is usually installed in front of the glass window of the all-weather protective cover. Currently, a better all-weather protective cover is a protective cover that uses a semiconductor device to warm and cool down. The shield is equipped with a semiconductor body that can be automatically heated or automatically cooled, and consumes less power.
In addition, there is a hemispherical, spherical protective cover with a universally adjustable bracket that is aesthetically pleasing.
The outdoor shield must have a good sealing performance to ensure that rainwater does not enter the shield and erode the camera. Some outdoor shields also have exhaust fans, heating plates, and wipers to better protect equipment. When the weather is too hot, the exhaust fan works automatically; when it is too cold, the heating plate works automatically; when there is rain on the cover glass, the wiper can be activated by the control system. The choice of the camera protective cover is first to accommodate the camera plus the lens used, and to leave the appropriate margin, and secondly to choose the appropriate type of protective cover according to the use environment, based on which the protective cover will be included. And the weight of the entire camera front end including the pan/tilt, and the bracket with the corresponding load-bearing value is selected. Also depends on the overall structure, the fewer the mounting holes, the better the waterproof, and then the internal wiring is easy to connect, and finally consider the appearance, weight, mount and so on.
In the protective cover, in addition to the spherical protective cover for the integrated camera system, there are different shapes such as a cylindrical shape and a rectangular shape, and the application has two types of indoor type and outdoor type. The indoor camera cover is mainly designed for decorative, concealed and dustproof, while the outdoor type is suitable for all-weather applications due to its all-weather application. The material of the protective cover is mainly aluminum, alloy, extrusion, stainless steel and so on.
Aluminium foil (or Aluminum Foil), often referred to with the misnomer tin foil, is aluminium prepared in thinmetal leaves with a thickness less than 0.2 mm (7.9 mils); thinner gauges down to 6 micrometres (0.24 mils) are also commonly used.
Aluminium foil is produced by rolling sheet ingots cast from molten billet aluminium, then re-rolling on sheet and foil rolling mills to the desired thickness, or by continuously casting and cold rolling. To maintain a constant thickness in aluminium foil production, beta radiation is passed through the foil to a sensor on the other side. If the intensity becomes too high, then the rollers adjust, increasing the thickness. If the intensities become too low and the foil has become too thick, the rollers apply more pressure, causing the foil to be made thinner.
Aluminium is used for packaging as it is highly malleable and can be easily converted to thin sheets and can be easily folded, rolled and packed.it is also used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.
Aluminum Foil 8011,Aluminum Jumbo Roll Foil,Aluminum Household Foil,Laminates Aluminum Foil
Henan Everwin Trade Co., Ltd. , https://www.ewaluminium.com