If you want to do a wireless monitoring system or have a wireless monitoring project, how do you choose the right wireless bridge? It seems to be very simple to say that it is not so simple to really apply suitable, low-cost, and effective applications. Following the author combined with the actual construction experience, briefly talk about the bridge selection points.
1, sight distance conditions
Wireless bridges transmit signals through electromagnetic waves. There is no shelter between the transmitting end and the receiving end. Otherwise, the transmission effect and transmission distance will be affected. Therefore, before you formally purchase wireless devices, please confirm the requirements and understand the actual application environment. This will determine whether there is a need for a relay station to be set up in the overall system plan, and to prevent an irrelevant inconvenience to the temporary addition of equipment to the project.
2, the distribution of monitoring points
Determining the number of wireless monitoring points, monitoring points, and sub-control rooms in the system, as well as their geographical distribution of the environment and relative positions, will help users rationally manage the system and effectively use and deploy radio frequency resources.
3, transmission interval distance
Transmission interval distance, which is the distance between the monitoring point and the monitoring room, is the main basis for selecting wireless bridge equipment. The transmission distance is differently transmitted, corresponding to different models of equipment, corresponding to different values. This is very important in order to effectively control the purchase price of the project.
4, transfer content
The content of the information that each monitoring point needs to send to the monitoring room needs to transmit the audio signal, wireless command control (cloud mirror control), and other data information besides the requirement to transmit the image information. Different requirements, it is necessary to choose a different bridge device.
5, the task approach
In the wireless monitoring system, the image system usually adopts a one-to-one or point-to-point task approach, that is, one transmitter corresponds to one microwave receiver, ten monitoring points require 10 microwave transmitters, and 10 microwaves are required at the receiving end. Receiver.
For the control system, usually only one control host is required, such as a hard disk recorder or a matrix, and there are multiple decoders. Whether you have one monitoring point or 100 monitoring points, only one remote command transmitter is required, and the number of remote command receivers depends on the number of demand control heads and lenses.
For example, there are 10 monitoring points, 8 of which are domes and 2 are bolts. The equipment to be allocated will be: 10 sets of analog microwaves + 1 command transmission + 8 command receivers.
6, supporting equipment
In the application, it is not a wireless bridge, but also a lot of supporting equipment, such as the transmitting antenna, antenna mounting bracket, power RF cable, and taking over the antenna, anti-disturbance amplifier, microwave receiver, antenna mounting bracket, RF cable Wait.
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