Elevator wiring tips to reduce interference with video surveillance

Now the elevator is installed in the monitoring camera system, but because the elevator environment complex causes many video surveillance images in the elevator well road environment by different degrees of interference, monitoring effect is not very good. In response to this problem, and the associated electronics professionals pointed out that if the installation of elevators in some wiring skills, it can be to a large extent to alleviate such interference. Specific as follows:

　　1, horizontal stripe up and down scrolling:

This phenomenon shows that the stripes are constantly rolling up or down, and the stripes are relatively wide. Seems to be interference, in fact, is not the external electromagnetic waves, if the stripe, the image is clear. This phenomenon basically accounted for the image interference of more than 80%, this phenomenon can be said to be a ground potential problem, refers to the front-end equipment and the central control room between the ground potential difference, this problem is the multimeter can not be tested, if the measured number is zero, it does not mean that there is no potential difference. The only way to do this is to disconnect it from the loop, which means that the two ends are disconnected (preferably the front end). If both ends of the ground do not want to break, afraid of the impact of lightning. That add a ground isolator to solve, this equipment is passive equipment, as long as the series in the coaxial cable at any end, easy to install, good effect, can eliminate this stripe phenomenon. For the superior signal isolator.

　2, Network interference:

This phenomenon image quality is very poor, basically do not see any object, the image is sometimes not, and the screen freezes. This phenomenon is due to the wire core of the cable and the shielding broken, short reason. Most of this occurs on the connector, and the individual also has no construction in the wiring. Due to the problem of welding or the quality of the joint parts caused by interference in the project also accounted for more.

　　3. Disturbance of space electromagnetic wave:

This interference source is more complex, mainly front-end equipment, cables, near the terminal has a strong radiation source or high-power equipment in operation. The main performance is image distortion, jitter and so on. Therefore, before the construction should be aware of the surrounding environment, as far as possible to avoid radiation sources. In the already completed projects, and interference has unavoidable circumstances, only add anti-jamming equipment. This method is relatively economical, fast, and the image is also guaranteed.

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Article Source: www.096mall.com

Elevator wiring tips to reduce interference with video surveillance