Shulou(Shulou.com)06/03 Report--

The time of the network camera and network hard disk video recorder in the video surveillance system can be calibrated by the gps timing server.

Network camera problem: some network cameras do not have a network hard disk video recorder, such as a home network camera, or the device is in a closed Internet and cannot synchronize with the network, using the default time of the system to continue to go.

For the camera or NVR connected to the Internet, it can be calibrated through the NTP protocol. In the webcam or hard disk video recorder configuration interface, you can calibrate the clock by filling in the address of the network clock server and connecting to Internet. Due to the complexity of the network between the video surveillance network and the NTP time server in the Internet network, setting up the NTP time server can complete the time synchronization of the video surveillance network, with high reliability, but poor accuracy. Due to factors such as time delay, network congestion and the geographical location of the external authoritative clock source, it is also possible to miscalibrate the devices in the security video surveillance network, and at the same time, it is not safe. Video information can be stolen through the Internet.

If it is a local area network application or a dedicated network camera and network video recorder, you must first set up a NTP clock server inside the network, and then fill in the IP address of the SYN2151 timing server into the configuration interface of each network camera or network hard disk video recorder in order to ensure time synchronization. Note: in this case, it is necessary to ensure the clock accuracy of the local clock server. generally, it is expensive to use a high-precision local clock source. The SYN2151 Beidou timing device uses GPS positioning and calibration, and uniformly uses the standard protocol NTP to connect the equipment, the security platform and each equipment in compliance with the clock synchronization agreement in the standard protocol. Under the condition of low cost, it can ensure the time synchronization of the video surveillance network and reduce the problem of system clock disorder.

Compatibility of webcams: due to the use of multiple webcams in the same surveillance network, such as Huawei's cameras in the original video surveillance network, the newly added cameras in the upgrade use Dahua. Some devices in these different brands of webcam video surveillance networks are based on Linux, some are based on AIX, Solaris, and even some are based on Windows platform. There are some compatibility problems between these different brands of webcams and different platforms, or the time zone time format of these terminals is inconsistent, so there is a large time error.

Debugging recommendations:

1. First, connect the time service antenna and the clock server to conduct a temporary test to test whether the equipment and the antenna can function normally. After the antenna is connected, the antenna is placed by the window or outside, and the equipment is turned on. 2-3 minutes of power on (according to the field situation, the receiving time is also different) will show the current number of stars and working status. When the star is received, it means that the equipment and antenna can work properly.

2. Connect the erected antenna to the antenna / ANT interface of the clock server, observe the front panel, and so on, after receiving the satellite, connect the network cable to the clock server and connect directly to the computer / local area network, and log in to the management interface of the device through software or WEB to configure.

3. Change the default IP and gateway in the server to the IP and gateway that are the same as the current local area network.

4, click on the time in the lower right corner of the computer, select "Internet time"-change the setting, select "Internet time server synchronization" in the input box to modify the default "time.windows.com" to the clock server modified IP, and click "Update now".

After clicking "Update now", it indicates that the synchronization is successful, which represents the success of this school time.

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