Common equipment for network monitoring
Network camera, hard disk recorder NVR (or ordinary PC plus client, suitable for ordinary users who have desktop computers at home), switches (need to be adjusted according to the number of cameras and bit rate, you can use the supplier's recommendations) hard disk, monitor , Network cable, power sheath cable, power adapter (or 12V DC switching power supply), camera bracket, network cable crystal head, etc.
Camera installation method
When the front-end camera is running normally, the captured video signal is transmitted to the hard disk recorder in the background through the network cable and the switch for preview and storage. According to the different specific connection methods of the points of the monitoring system, the specific connection diagram can be seen in the third step below.
Step 1: Determine the installation position and monitoring area of ​​the camera, and fix the camera to the building or the monitoring pole through the camera bracket.
Step 2: Determine the location of the background equipment (HDD recorder and display), install the hard disk and place the hard disk recorder, and prepare the power strip for the background equipment.
The third step: after the front and back ends are completed, wiring is required (if planning or planning is done in the early stage, this step is actually prioritized, especially in the environment where the decoration is prepared, the pipeline needs to be pre-buried), line There are two parts: first, confirm the location of the switch, you need to connect each camera to the switch through the network cable, and you need to connect the network hard disk recorder (NVR) to the switch. The cable is routed in accordance with the principle of convenient wiring and beautiful and safe. , And make a crystal head on each end of each network cable;
Secondly, for the wiring of the camera power supply line, each camera requires a 12V / 1A or 2A power adapter. Depending on the construction environment or cost requirements, you can use a switching power supply (it is recommended that a 12V / 10A switching power supply should not bring more than 10 cameras , And so on), need to be equipped with a power plug. as the picture shows:


If the camera is powered by POE, you only need to lay a network cable, and there is a POE switch to supply power to the camera. as the picture shows:


In addition, according to the different points of the monitoring system, the connection method used is also different.
Framework 1: Minor works of 1-8 points


For small projects of 1-8 points, ordinary 100M switches can be directly used to achieve the network environment. If 2 million pixel IPC is used, the stream is calculated at 6Mbps, the bandwidth occupied by 8 cameras is 8 * 6 = 48M, and the actual utilization rate of 100M switches is 50% -70%, that is, 50-70M, which can fully meet 8 IPCs. Transmission requirements.
Framework 2: 9-50 small and medium-sized projects


For small and medium-sized projects with 9-50 points, it is not enough to just use 100M switches. A higher-performance Layer 2 full Gigabit switch is required as an aggregation to ensure the smooth transmission of video information.
Framework 3: Large and medium-sized projects with more than 50 points
For medium and large-scale projects with more than 50 points, a three-layer network architecture is needed: access layer, convergence layer, and core layer.
Step 4: Commission the camera. After the installation is completed and all lines are connected, power the camera. You need to make relevant network settings on the network hard disk recorder (NVR), add and assign network cameras (the configuration methods of different manufacturers are different ), After adding all the cameras, you will see the image, you can debug the camera angle, adjustable lens, etc. to the appropriate effect.
For cases where the number of front-end cameras is small, you can directly add cameras to the hard disk recorder, and let the cameras automatically assign IP addresses.
For a large number of cameras, be sure to write the camera address first, then install and debug, and when adding cameras, it is recommended to add directly to the WEB page, not directly on the hard disk recorder.
Precautions
The related settings of the network hard disk recorder, recording, image color, etc. need to be manually set, and can be operated according to the manual of the purchased equipment. Such a network monitoring system is completed.

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