Used surveillance camera can be divided into three parts: the electrical part of the lens part and mechanical part. Precision monitoring equipment structure, once to improper care will cause damage, especially in the harsh environment, whether it is snow, fog, rain, humidity larger venue, or place in the sand, the larger dust or corrosive chemical odor even the ambient temperature is too high or too low, to transform larger temperature difference between shooting scenes, in extreme environments, monitoring of the network camera work performance should attract enough attention, otherwise there will be shooting the poor picture quality or the camera can not normal operation even completely damaged. In rainy weather, the electrical and mechanical parts of the network camera inside if rain or wet air erosion, it will produce the most sensitive parts of malfunction or even damage electrical parts, causing damage to the electronic components; mechanical part by moisture against mechanical action may not be in place or even stop the operation. Sand, dust of the infringement of the lens and camera inside, they will affect the effectiveness and quality of the shooting screen. Surveillance camera operating temperature range of -10 ° C to 40 ° C, and the most suitable working temperature is 0 ? ~ 30 ?, outside this range will affect the image quality and even damage to the camera. According to the survey, the climate temperature range -30 ° C to 45 ° C, the temperature extremes of the individual regions and even beyond this range, which is far beyond the scope of surveillance camera bear. Rain, snow, dust or extreme environments very large impact on the performance of the electronic components of the surveillance cameras, surveillance camera and more using CCD photosensitive element, which components are easily influenced by the external environment, leading to the surveillance camera in temperature polarized shoot distortion. So how to ensure the normal operation of the outdoor network camera in the rainy and sand this harsh environment? Most camera housings on the use of the market, its main function of sun, rain, dust, antifreeze, anti-condensation. First, the tightness of outdoor protective cover is high enough to prevent rainwater from entering the Inlet to open in the bottom of the shield to avoid the rain along the cable down into the shield; wipers should be installed in the front of the shield, in order to promptly clean up rain and dirt, so that the camera through the glass intake clear images; defroster should be installed the shroud before or on the glass, the window frost, snow to melt; followed shield should be fitted with a heater in the temperature low heating working properly in order to enhance the internal temperature of the shield, ensure that the camera / lens; interior or exterior the fan hood air circulation, reduce the temperature inside the protective cover; configuration should also be considered in locations less rain and more sand cleaner and wipers with at any time the window glass clean to ensure that the effect of image monitoring. The outdoor guard auxiliary equipment control automatic control and manual control functions, such as the heater / defroster, fans are automatically enable or disable the the shield internal temperature sensor, like wipers, washer The action is achieved through the operation of the control device by the control personnel. The outdoor network camera shroud generally use aluminum coated steel, stainless steel or plastic manufacturing that can be used in an outdoor environment. Manufacturing materials must be able to withstand ultraviolet radiation, or will soon cracks, discoloration, reduction in strength aging. Shield in need durable, with a high degree of safety, can resist the man-made destruction of the environment should be using a stainless steel shroud; appropriate treatment aluminum shield is also an excellent guard, processing methods, there are three: polyurethane paint, anodizing , anodic oxidation and painted. In the environment of corrosive gas should not choose the the aluminum shroud; made of stainless steel or special plastic guard should be used in the salt spray environment. In addition, to increase the safety performance of the shield, to prevent vandalism, many the camera protective cast also equipped with a tamper switch, the alarm signal will be issued once the protective cover is opened. Camera mounted in a highly hostile environment, not only to be the same as General outdoor protective cover has a high degree of sealing, cold-resistant, hot resistant, anti-sandstorm, anti-rain and snow, and so on, but also anti-smashing, impact resistance, corrosion protection, or even need explosive environment, so you must use a special high security guard. Outdoor network camera shield often with temperature relay automatically open fan-cooled, automatic low heating at high temperatures. Shield due to use different configurations of the location such as a sun shade, interior / exterior fan, heater / defroster, wipers, washers and other auxiliary equipment.
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