On Wuxi remote monitoring In system engineering installation practice, we need to develop monitoring design schemes according to different environments and customer requirements. Only complete and appropriate monitoring schemes can ensure the stability, economy and efficiency of the monitoring system. Today, Wuxi Dehang Technology Co., Ltd. will talk about several transmission modes of network monitoring system installation.
When we do specific monitoring projects, we must choose the appropriate transmission mode according to the site environment and the requirements of the owner, so that the owner can spend less money and not affect the monitoring project effect. The following are four common transmission modes and installation modes of the network monitoring system.
1、 Traditional way, by network video camera +Power+network cable composition
This is a common method, which is used by many friends. When cabling, power and network cables should be laid at the same time, and the power supply can also be taken from the nearest 220V AC, so as to save power wires. Its advantages and disadvantages will not be discussed here. Provide power for each webcam. Another network cable transmits network data to the network Digital Video Recorder NVR。
2、 POE power supply mode, with webcam+POE Switch
This saves one power cable compared with the previous method. A network camera only needs one network cable as the medium for signal transmission, and no power cable is needed. Non for network cable Shielded Cat5 twisted pair It's OK. The transmission distance is 100 meters.
Why is PoE switch used as network monitoring system in the mainstream nowadays? It has the following advantages:
1. Save wire material, save wiring time, save wiring labor, and provide engineering construction efficiency.
2. Without power supply, there will be no strong current, no danger of electric shock, reduced failure probability and maintenance cost.
3. It reduces the construction difficulty, is simple, convenient and easy to use, and the project wiring is also more beautiful.
3、 In case of long distance, webcam+optical fiber+transceiver
It can transmit farther!
As we said earlier, if the network cable transmission is normal within 100 meters, then if it exceeds 100 meters, we generally consider using optical fiber transmission. Optical fiber transmission is not only far away (can transmit 20 kilometers) but also stable.
As we all know, when optical fiber transmits data, it converts data signals into optical signals for transmission, and then converts optical signals into data signals. In this way, we use optical fiber transceivers to cooperate to complete the work.
Optical fiber is cheap and has long transmission distance, so it is widely used in monitoring projects. However, the optical fiber needs to be welded, and the welding equipment is expensive, so generally the welding needs to be carried out by special personnel, which requires a certain amount of cost and time. Optical fiber transceivers are divided into 100M and Gigabit, and can be selected according to the number of cameras.
4、 Wireless transmission mode, camera+wireless bridge
In the specific implementation environment of the monitoring system, if the wiring is difficult to meet barriers or insurmountable obstacles, we can use wireless transmission, so we can use wireless bridge.
For another example, communities with hardened roads, elevators, factories that have been built, open areas that are far away, and fields are all suitable for wireless transmission.
Wireless bridge can convert network signals into radio waves for point-to-point transmission. Used in pairs. Due to point-to-point directional transmission, long-distance wireless transmission can be realized, from hundreds of meters to tens of kilometers.
Precautions for the construction of using wireless bridge: there shall be no obstruction between the transmitting and receiving ends. In this way, the signal transmission will be stable.
The above four methods are commonly used in the monitoring and installation process, which mainly need to be selected according to the environment. As a monitoring constructor, you need to have a certain grasp of each method, so that you can flexibly make normal choices according to the environment and the requirements of the owner.
