Outdoor wireless monitoring system scheme
Wireless network technology has been widely used in recent one or two years, and both home users and enterprise users can see the shadow of wireless technology. Among them, using wireless router to build wireless LAN may be our most common wireless technology application, but today we are not talking about wireless LAN technology, but another wireless technology, wireless network monitoring technology.
As we all know, the use of wireless network technology has brought us great convenience. Using wireless network technology can save the trouble of wiring, let the signal cover the place where wired network can not be extended, and save maintenance cost.
Wireless monitoring technology also has these advantages, especially in the harsh environment such as coal mine and iron and steel smelting. Using wired network monitoring not only makes wiring more troublesome when building monitoring system, but also brings huge workload to users when dismantling it. The establishment of wireless monitoring system is relatively simple. Only relevant equipment needs to be installed at the monitoring site without wiring, and wireless monitoring products can be taken away directly when dismantled. Therefore, compared with wired monitoring system, wireless monitoring system has great advantages.
Understand wireless monitoring
I believe you are familiar with the wired monitoring system. The wired monitoring system is mainly composed of network cameras, pan/tilt, video servers, monitoring terminals and other devices. The equipment required for wireless monitoring system is relatively simple. It only needs wireless network camera, wireless AP, monitoring terminal and other equipment. If long-distance wireless monitoring is needed, outdoor wireless bridges and other equipment should be added.
At present, some network vendors have provided some so-called wireless monitoring schemes, and their network topology diagram is as follows:
The above picture shows the wireless monitoring system provided by some network vendors at present. As we can see from the figure, this system is mainly divided into two parts, one is the monitoring center and the other is the foreground monitoring. The foreground monitoring is mainly composed of network cameras and video encoders, and some of them are equipped with pan-tilt and other equipment, which is the core of the whole monitoring system. We know that the most important equipment in a monitoring system is the network camera, and whether the network camera is wired or wireless will determine whether the whole monitoring system is wired or wireless. In this scheme, we can clearly see that it uses a wired network camera, which is connected to the wireless AP through a video encoder, and then transmits the captured image signal to the monitoring center through the wireless AP. This scheme is called wireless monitoring scheme because wireless data transmission is adopted between the monitoring center and the foreground monitoring, but it is not wireless monitoring in the real sense, because the system still needs wiring, which will also bring trouble to the users who set up this system. The real wireless monitoring system we are talking about is a system composed of wireless network cameras, and any link in the front desk of the monitoring system does not need wiring.
As can be seen from the above figure, the distribution of wireless monitoring system is relatively simple, and the choice of products is relatively small. Basically, only wireless network cameras, wireless AP, control terminals and some commonly used switches are needed to realize wireless monitoring. I believe everyone knows the structure of wired network monitoring system, so why doesn't wireless network monitoring system use video server and other equipment? In fact, these functions are integrated into the wireless network monitoring camera, so the wireless network monitoring camera plays an irreplaceable role in the wireless monitoring system.
The establishment of WLAN depends on the specific environment, and the wireless monitoring system is a monitoring system based on WLAN. Therefore, the establishment of wireless monitoring system should also be determined according to the specific environment, but generally speaking, wireless monitoring system can have three modes, one is outdoor wireless monitoring system, the other is indoor wireless monitoring system, and the other is outdoor and indoor mixed monitoring system. Outdoor wireless monitoring system is used in some factories, and they need to monitor the safety of various places. Indoor wireless monitoring system is used in mining, iron and steel smelting, hotels and other industries. We will not describe the outdoor and indoor mixed monitoring system. As long as the outdoor and indoor monitoring systems can be successfully established, this mixed mode is very simple. Outdoor wireless monitoring system
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