IPC wireless monitoring 15KM ultra-long-distance wifi module transmission is unstable and common problems. With the development of wireless technology, IPC wireless transmission project has become one of the common weak points. Among them, more and more people choose wireless network bridges to build monitoring systems, because of its small delay, good stability, clear images, flexible applications, and powerful expansion advantages, which are favored by engineers. However, in the application of no IPC cable network, many engineers often encounter the problem of poor reception of the wireless network bridge. What should I do at this time?
1. Quality of positioning equipment: When the 15KM ultra-long-distance wifi module is used outdoors, the environment is relatively poor. In addition to the functions of windproof, rainproof, dustproof and anti-oxidation, it also needs to have strong anti-interference. In order to do this, ordinary civilian wireless cannot transmit stably. Therefore, for outdoor wireless transmission, it is best to choose a wireless module above the industrial level;
2. Check whether there is any obstruction in the middle: in order to ensure the stable transmission of wireless signals, try to have no obstruction between transmission and reception;
3. Adjust the direction of the device: To adjust the direction of the wireless, the horizontal and vertical angles of the antenna must be within its range;
4. There is no problem with the above two. It is necessary to check the signal strength and CCQ signal connection quality by software. If the CCQ is not normal, we can scan the nearby frequencies to see if there are devices with the same frequency in use. If there is maintenance, although the frequency avoids interference;
5. Determine if your transmission distance is within the range of the device transmission. If it exceeds too much, boost the signal by increasing the transmit power or increasing the antenna gain.
The 15KM ultra-long-distance wifi module can realize two-way data transmission, and can be used as transmitter or receiver when transmitting video signals. Another mode of wireless is repeater mode. At this point, many customers will ask, can the wireless module directly set the device to repeater mode for reception and signal transmission?
In fact, this transmission method can transmit network signals, and the bandwidth is not large. However, if you transmit video signals, it will definitely not work, because transmitting video signals requires relatively high wireless network bridges, and if you use relay mode to forward signals, the signals cannot be processed. Therefore, if you need to relay the signal, it must be relayed through a pair of wireless network bridges, and the signal must be transmitted to the middle through the switch to ensure the stability of your wireless transmission system.
Generally speaking, 15KM ultra-long-distance wifi module must start from both internal and external aspects to ensure the effect of stable transmission. Internal mainly refers to whether the quality of the wireless itself meets industrial quality standards. External refers to the transmission environment, equipment installation and debugging precautions and other factors.
What common problems will the 15KM ultra-long distance wifi module encounter during the transmission process? In the IPC remote monitoring system, the construction period of wired transmission is generally long, which brings great inconvenience to the construction project. Therefore, most enterprises will use wireless transmission to achieve long-distance transmission, and wireless network bridge installation is simple. low cost. The flexible network advantage is favored by engineers and is widely used in the wireless transmission market. What problems are often encountered when using 15KM ultra-long-distance wifi modules to achieve remote video transmission? Below is a brief discussion.
1. How far can wireless transmit?
The transmission distance of different environments is completely different, because the transmission distance of the environment is completely different. Obstacles have high bottoms. Walls have thickness. Wall material. Trees have density, etc. For outdoor antennas, try to mount the outdoor antennas at both ends to a high place, so that the antennas are open and visible to each other. In this case, the transmission distance is the transmission distance indicated on the data.
2. Is there a block between transmitting and receiving to receive the signal? How far can it be transmitted?
As for whether the shield can receive the signal. The transmission distance depends on the site environment. If transmitting in a shielded environment, the attenuation of the wireless module is very large, so the transmission distance must be affected. Therefore, in order to ensure stable transmission of the signal, we must avoid shielding in the middle to ensure that there is no shielding between receptions.
3. Why can the ultra-long-distance wifi module that can transmit several kilometers transmit less than a few hundred meters during the test?
When we do outdoor antenna tests, we all use equipment, receive transmit antennas, to avoid blocking objects. For example, some people only consider the height of the antenna when testing, and do not adjust the angle of polarization, or devices that cannot achieve the same level of power. Therefore, the set up antennas can see the test conditions from each other.
4. Why is the wireless module unstable after normal connection?
After normal connection, it is equivalent to the fixed installation angle and height of the antenna, and there will be no physical change in itself. Instability can occur at the junction of the feeder. For example, the increase in contact resistance caused by long-term oxidation, and the operation of equipment such as heating, DC power supply waveforms, etc. It is especially important to discover the effects of weather through practice. Heavy snow affects the signal. Therefore, when choosing wireless for long-distance transmission, factors such as rain attenuation should be considered as much as possible, and the power and antenna gain of the transmitter should be increased to avoid the influence of external factors.
What is the difference between the transmission rate of the 5.15KM ultra-long distance wifi module and the switch?
Compared with the transmission rate of wireless data information, switches are faster than wireless. At present, the transmission rate of switches can reach 10,000 megabits, while wireless modules can only reach 1,000 megabits. When the switch is working, the channels between many groups of ports can actually work simultaneously. Therefore, the function of the switch reflects not only the function of the wireless module, but also the collection of multiple functions. That is, the wireless module is generally divided into two ports, and the switch density is high.
The above is the relevant knowledge about the remote transmission of 15KM ultra-long distance wifi module. Xiaobian recommends building a stable long-range wireless system. Professional and technical personnel should guide the installation, do a good job in every detail of the installation and debugging process, so that the system can play a good transmission effect.
