How to eliminate the three major interference of security monitor
Today, security monitoring has become one of the most important components of our security work. From the high-definition front-end camera, to the more convenient network transmission monitoring, and to the more powerful storage and high-definition video display on the back-end, the increase in this investment alone has explained to us the importance of video surveillance in the entire security work. ***. However, high investment may not necessarily achieve ideal returns. For many users, although the front-end monitoring equipment is sufficiently advanced, there are more users who use their back-end display to make their equipment "fall In the last step "before.
In fact, the monitoring monitor's interference elimination is not a problem. There are many times when a small, simple process can make our monitor “full of blood”. Today, the author will teach you how to remove the most common interferences. Ways to make the monitor no longer suffer from interference.
The most common interference: wood grain interference
In our application, wood grain interference is probably one of our most common disturbances. Not only monitors, but also TV lines transmitted on some old-fashioned non-wired video signals have been harassed by these lines. In light conditions, it may affect our visual fatigue, but it may even affect our normal viewing. Therefore, this is often regarded as our number one interference situation.
In fact, there are many reasons for this week's disturbances, and the most common one is caused by flaws in video transmission cables. In the construction of the monitoring system, the cables are often the most easily overlooked part of the network, so it is also easy to cause uneven quality of the cables. When the quality of the copper wire inside the cable is not high, or the outer screen is too sparse, it will have a very significant impact on the video display of the terminal. This is mainly due to the different cable quality leads to the resistance of the entire line is too large, and ultimately affect the quality of the signal transmission. For the solution of this line interference, the use of cable replacement is probably the only way.
Maximum area interference: moire interference
However, due to similar causes of interference for many reasons, the determination of the failure is undoubtedly the most important task, and it is recommended that it be done by an experienced person to avoid unnecessary error overhead.
In fact, in addition to the line problem, wood grain interference is sometimes caused by strong current harassment near the transmission line. This is mainly due to the presence of superimposed interference of normal power supply during the transmission of the line, or caused by the thyristor equipment in its own power grid, and these will also have a great impact on the transmission of the line. Of course, the handling of this interference is obviously much easier than the above method, as long as we can use the clean power supply or online power supply in the entire system, we can pass this small line pattern out.
In addition, the pasغير مجاز مي باشدe of strong currents around the perimeter will also affect our circuits. For this problem, we will use enhanced shielding for the front-end equipment, or ground the video cable.
In addition to our most common wood-grained disturbances, there is another type of disturbance that occasionally affects our viewing vision, which is web-based interference. In our common interference phenomenon, the area of influence of this interference can be regarded as one of the largest. However, although its coverage is relatively large, it does not seem to be "dominant" when it is solved.
For the emergence of such failures, it is generally due to the short circuit or the open circuit of the transmission cable core of the video cable and the surrounding protection network. Therefore, such problems often occur mostly in BNC connectors or other types of connector parts. When we solve a similar problem, we can easily troubleshoot this type of interference by checking the corresponding connectors one by one and replacing the problem devices.
The most neat disturbance: vertical bar interference
Although this type of interference may not be very common, its characteristics are quite obvious. The main reason for the formation of such interference is that the quality of the cable is not in line with the standard, which ultimately results in abnormal data properties in the transmission process.
Therefore, in solving this kind of interference situation, most of us will use "start series resistor" or "terminal parallel resistor" approach to solve. Of course, the best way to prevent this interference is when we purchase the line, we must carry out the necessary product testing, early detection of the problem, so as to avoid facing a rework mess after the project is over.
The above three types of interference basically cover one of the most common interference phenomena in video surveillance. From the above analysis, it is not difficult to find that the reason for the existence of an equivalent part is due to the equipment or construction defects. Therefore, this also reminds us that in reality, interference is not a big problem. It is only when we construct or purchase accessories that we need to conduct more and more rigorous testing on the equipment. We must grasp the quality of the product at the source so that we can't use it in the final application. Leave troubles that can be avoided.
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