A wireless bridge is a wireless bridge bridging device that can connect two or more wireless networks for data transmission. Because of this characteristic, it is widely used in wireless monitoring.
Wireless monitoring, literally, is a wireless network monitoring system. All video data is transmitted over the wireless network instead of the network cable. The wireless bridge is equivalent to a segment of the network cable here. For some places that are not convenient for wiring, the wireless bridge can solve the problem.
According to the operating frequency, the wireless bridge is divided into 2.4G and 5.8G. If divided by the place of use, the wireless bridge can be divided into an outdoor wireless bridge and an elevator wireless bridge. Let's summarize some of the differences between the outdoor wireless bridge and the elevator wireless bridge.
The most obvious difference is that the outdoor wireless bridge is used outdoors, and the elevator wireless bridge is used indoors, that is, in an elevator or elevator shaft. Due to the different environments used, they each have different requirements for some functions.
In the outdoor environment, climate change is more complicated, and it is inevitable that wind and rain will hit the ground, but also thunderstorms, high temperatures, icing, etc., so the waterproof bridge, lightning protection, sun protection and other characteristics of the wireless bridge are very high. Even the most common outdoor wireless bridges must meet these characteristics, otherwise they will not be used outdoors.
In addition, due to various obstacles and occlusions in the outdoor, the signal will cause certain attenuation and loss, and the outdoor wireless bridge has higher requirements on the transmission power and the antenna gain. Generally speaking, the larger the transmit power and antenna gain, the better the wireless bridge transmission effect and the farther the distance.
In the elevator environment, although there is no climate and weather influence, there are various kinds of radiation and interference in the elevator and elevator shaft. In order to transmit the elevator monitoring data well, two conditions must be met: anti-interference and less interference. . That is to say, the wireless bridge used in the elevator must not only resist certain interference, but also cannot generate other interferences.
Because of the special nature of the elevator environment, elevator monitoring generally uses elevator-specific wireless bridges instead of outdoor ordinary wireless bridges. Compared with outdoor bridges, elevator bridges are optimized in some aspects, which is more conducive to elevator monitoring and transmission. Moreover, since the requirement itself cannot generate a large amount of interference, the transmission power of the elevator wireless bridge and the antenna gain cannot be too large.
To sum up, the outdoor wireless bridge is used outdoors, and has high requirements for waterproof, lightning protection, sun protection, low temperature resistance, transmission power, and antenna gain. The elevator wireless bridge is applied to the elevator shaft, and the anti-interference requirement is high.
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