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Working principle and classification of explosion-proof cameras
When it comes to explosion-proof cameras, many people may have some misunderstandings about the understanding of explosion-proof and anti-riot. Some even use anti-riot products in high-risk areas with high flammability. This method has a high risk factor and even causes the explosion to seriously affect people's property. loss. Anti-riot is anti-violence, anti-destructive, or resistant to blows. These products have a relatively hard outer casing and do not have explosion-proof electrical performance and certification. These are two distinct products. Let's talk about the working principle and classification of our explosion-proof cameras, which are focused on R&D and production.
I. Working principle of explosion-proof camera The working principle of explosion-proof camera is to suppress the generation and occurrence of four elements of explosion. The electrical products are still working normally in high-risk environment. The four elements of the explosion are: 1. On-site flammable gas, dust and mixture And constitute a certain concentration; 2. The site has sufficient oxygen to burn reaction with combustibles; 3. There is enough temperature on the site to cause the mixture to react in oxygen; 4. The space is small enough to allow the heat after combustion to gather in a short time. A certain concentration even blasts. Any of the above four elements can be effectively prevented from exploding.
II. Classification of explosion-proof cameras 1 According to the application site, the explosion-proof cameras are mainly divided into two categories: mine explosion-proof cameras and factory explosion-proof cameras.
1. Class I—Explosion-proof cameras for mines and underground electrical equipment. In addition to obtaining the explosion-proof certificate for the corresponding products, it is necessary to obtain the safety certificate for mining products issued by the Safety Labeling Center of the National Standard for Mine Products, namely the MA mark. Companies that produce mine explosion-proof cameras must obtain the appropriate production qualifications to permit production.
2. Class II—Explosion-proof cameras used in factory electrical equipment factories are explosion-proof cameras commonly used in non-downhole factories. 2 According to the product function, 1, explosion-proof fixed camera This type of camera consists of: imaging unit, power supply unit, communication unit, plus external simple mechanical structure to achieve its fixation and steering, is a low cost, simple function, easy to install Explosion-proof camera; 2, explosion-proof multi-function camera This type of camera consists of: imaging unit, power supply unit, communication unit, auxiliary lighting unit, control unit, steering unit, and other auxiliary units, is a mainstream explosion-proof camera. There are also some non-infrared light-filled products, such as: LED cold light, halogen, helium, laser and other light-filling means can be included in this type of explosion-proof camera;
3, split-type explosion-proof camera This type of camera can have more or less functions, according to different combinations to achieve functions, you can use the explosion-proof pan-tilt to achieve camera rotation, through the installation of fill light to achieve auxiliary lighting, through the installation of different communication equipment To achieve communication requirements, control input and compatibility through the installation of decoding devices. This type of product is complicated to install and has high requirements for installation personnel, but maintenance and repair are simple;
4, explosion-proof integrated camera This type of camera is integrated with a variety of functions in one, the integration degree has a certain difference according to the manufacturer's design, but the similarity is that it has a high degree of integration, with a variety of functions, lightweight appearance, Easy to construct and install, but maintenance and maintenance is more troublesome.
5. According to the transmission medium, the composite cable explosion-proof camera is generally a coaxial video cable + power cable composite, zoom explosion-proof camera is composed of coaxial video cable + power + control cable, commonly known as analog signal explosion-proof camera. 2, explosion-proof network camera refers to the explosion-proof camera transmitted through the network cable, the network is a digital signal explosion-proof camera. 3, explosion-proof fiber optic camera refers to the explosion-proof camera transmitted through the fiber is a digital signal explosion-proof camera. 4. Explosion-proof wireless camera refers to an explosion-proof camera that transmits images by wireless signals.
6. According to the definition, the standard-defining explosion-proof camera refers to the explosion-proof camera with the horizontal scanning line number below 540 lines. There are mainly 480-line and 420-line explosion-proof cameras on the market. 2. The high-definition explosion-proof camera refers to the horizontal scanning line number higher than 540 lines. Explosion-proof cameras, the market mainly has 720P 960P 1080P explosion-proof cameras, and the market for millions of high-definition network explosion-proof cameras, HD-SDI explosion-proof network cameras are also called high-definition explosion-proof cameras.