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Explosion-proof monitoring equipment is a kind of special industrial video monitoring equipment. At present, the development status of the entire industry is that some small and medium-sized enterprises do not have product development capabilities. They will produce explosion-proof cameras, explosion-proof infrared cameras, explosion-proof heads, and explosion-proof shields. Such products falsely propagate, deceive and mislead consumers. Moreover, many companies blindly produce substandard products and disrupt the market without investigating the market. Explosion-proof surveillance camera products need to be produced strictly in accordance with the national explosion-proof standards in order to enter the market circulation.
The effect of explosion-proof monitoring will be somewhat interfered with, showing a variety of disturbed forms, such as moire, snowflake interference, twill interference, horizontal stripes interference, up and down scroll bar interference, distortion distortion interference and up and down jitter interference, etc. Why? What happens to such an interference situation? How can we solve the problem of explosion-proof monitoring and interference to improve the monitoring results?
The first step: use the monitor on the front end to connect with the camera, to see if there is interference in the image, if there is interference from the explosion-proof monitoring itself (such as the replacement of the camera), if no interference, then go to the next inspection.
Step 2: Disconnect the coaxial cable transmission line from the video distributor or hard disk recorder in the surveillance room. Connect the monitor to the monitor to see if there is any interference. If there is interference, use an anti-jamming device. This kind of interference is called "environmental electromagnetic interference". This kind of interference is more common. If there is no interference, it means that the coaxial cable transmission line has not been disturbed. However, when the connection to the hard disk recorder is disturbed, it indicates that the ground potential difference between the system devices causes interference, and the addition of an optical isolator between the video cable and the hard disk recorder can solve the problem.
The third step is to determine whether or not to receive interference from the external environment. The most common and effective method is to monitor the effect of video in another place under the experiment.