Four transmission modes of building monitoring system

monitoring systemIn the building is essential, in the monitoring system engineering installation practice, according to the different environment and customer requirements, the development of monitoring system design, only improve the reasonable network monitoring scheme, in order to ensure the stability of the building monitoring system, economy and efficiency. The following isFour Common Transmission Methods of Network Monitoring System. Next, let us understand it.

1. traditional way
The traditional way is usually composed of network cable of network camera power supply. When integrated wiring, the power cord and network cable should be arranged at the same time. The power supply can also take 220V AC power nearby (to save the power cord) to provide power for each network camera. There is also a network cable to transmit network data to the network hard disk video recorder NVR.

2. POE power supply mode
POE power supply mode is composed of network camera POE switch, which can save a power line than before. A network camera only needs a network cable as the medium for transmitting signals, without using wires. The network cable can adopt unshielded over five twisted pairs, and the transmission distance is 100 meters without problems.

The main advantages of POE power supply:
① Save wire, save wiring time, save wiring manpower, improve construction efficiency.
② do not use power, do not involve strong electricity, will not produce the risk of electric shock, reduce the probability of failure, reduce maintenance costs.
③ Reduce the difficulty of construction, simple and easy to operate, and the engineering wiring is more beautiful.

3. long-distance optical fiber transmission mode
In the case of long distance, the network camera fiber optic transceiver can transmit farther! The network cable is usually transmitted within 100 meters. If it exceeds 100 meters, optical fiber transmission is usually considered. Optical fiber not only has a long transmission distance (20 kilometers can be transmitted), but also has stable performance. When optical fiber transmits data, the data signal is first converted into Optical signal transmission, and then the optical signal is converted into a data signal. In this process, an optical fiber transceiver is required to complete the signal conversion.

4. wireless transmission mode
In the implementation environment of the specific monitoring system, if the wiring is difficult or not suitable for laying cables, such as communities, elevators, factories, remote open areas, on-site and other environments, we can use wireless transmission to establish a transmission network through wireless bridges to achieve data Wireless transmission.
Wireless bridges can convert network signals into point-to-point transmission of radio waves, generally used in pairs, point-to-point directional transmission, which can achieve long-range wireless transmission from hundreds of meters to tens of kilometers. When using a wireless bridge, pay attention that there can be no obstacles or obstacles between the transmitting and receiving ends to make the signal transmission stable.
In the installation practice of monitoring system engineering, the monitoring design scheme needs to be formulated according to different use environments and customer requirements. Only by completing the appropriate monitoring scheme can the stability, economy and efficiency of the monitoring system be guaranteed.