In recent years, elevator security accidents have occurred frequently, and video surveillance in the car has captured a lot of thrilling pictures in elevators. The complex environment of an elevator is not as simple as that of other outlets, and many video surveillance images are affected due to the disturbance of the elevator hoistway environment. How to solve the problem when different disturbances appear on the screen?
Scenario 1: Scroll up and down in horizontal stripes This situation seems to be interference. Actually, it is not caused by external electromagnetic waves. If you put aside fringes, the image is clear. This phenomenon can be sure of the problem of ground potential, that is, the ground of front-end equipment. There is a potential difference in the ground between the central control room. The only way to solve this problem is to disconnect its loop, which is to disconnect the ground at both ends. If you fear the impact of lightning protection, both ends of the land do not want to break, you can also add a ground separator to solve.
Case 2: Net-like interference When the image quality is poor, basically no objects are visible. Sometimes there are even screen-like interferences when the image is not displayed even when the screen freezes. The phenomenon that the wire core and shielding of the cable is broken or short causes this phenomenon to occur. Most of these cases occur on joints, and individual ones have not been constructed well during wiring. Disturbance due to welding problems or poor quality of joint parts also accounts for a large part of the project.
Case 3: Interference of space electromagnetic waves This interference source is more complex, mainly in the front-end equipment, cables, there is a strong radiation source or high-power equipment near the terminal in operation, mainly as image distortion, jitter and so on. Therefore, you should understand the surrounding environment before construction and try to avoid the radiation source. In a project that has already been completed and interference is unavoidable, only anti-jamming equipment is added. This method is more economical and faster, and the image is protected.
Solving the situation in which the monitoring image of the elevator is disturbed by the environment can enable the security personnel in the monitoring room to clearly observe the situation in the car. When accidents such as power outages, failures, and security accidents occur in the elevator, the security personnel can discover and go to the rescue in time.
Scenario 1: Scroll up and down in horizontal stripes This situation seems to be interference. Actually, it is not caused by external electromagnetic waves. If you put aside fringes, the image is clear. This phenomenon can be sure of the problem of ground potential, that is, the ground of front-end equipment. There is a potential difference in the ground between the central control room. The only way to solve this problem is to disconnect its loop, which is to disconnect the ground at both ends. If you fear the impact of lightning protection, both ends of the land do not want to break, you can also add a ground separator to solve.
Case 2: Net-like interference When the image quality is poor, basically no objects are visible. Sometimes there are even screen-like interferences when the image is not displayed even when the screen freezes. The phenomenon that the wire core and shielding of the cable is broken or short causes this phenomenon to occur. Most of these cases occur on joints, and individual ones have not been constructed well during wiring. Disturbance due to welding problems or poor quality of joint parts also accounts for a large part of the project.
Case 3: Interference of space electromagnetic waves This interference source is more complex, mainly in the front-end equipment, cables, there is a strong radiation source or high-power equipment near the terminal in operation, mainly as image distortion, jitter and so on. Therefore, you should understand the surrounding environment before construction and try to avoid the radiation source. In a project that has already been completed and interference is unavoidable, only anti-jamming equipment is added. This method is more economical and faster, and the image is protected.
Solving the situation in which the monitoring image of the elevator is disturbed by the environment can enable the security personnel in the monitoring room to clearly observe the situation in the car. When accidents such as power outages, failures, and security accidents occur in the elevator, the security personnel can discover and go to the rescue in time.
material: acrylic fiber,For using with water-based paint , emulsion paint & wallpaper paint. packing using individual packed in polybag. Fit to exterior rough surface. Recommend to work with exterior paint. Could reach all types of the standard requirment, such as CE. High quality with low prices.
Paint Rollers, Foam Paint Roller, Ceiling Paint Roller, Wall Paint Roller, Smooth Paint Roller
QINGDAO SANJET NEW POWER MACHINERY CO., LTD. , https://www.sanjet.net