I Wuxi remote monitoring working principle
First of all, it will come from video camera The RV-2000 video acquisition terminal inputs the video signal into the RV-2000 video acquisition terminal, and then converts the video signal into a digital image of 25 frames per second through MPEG-4 image compression algorithm, and forwards the compressed audio and video data stream to the video monitoring center through the optical fiber network; Finally, the monitoring computer in the video monitoring center decompresses the image and sound data received from the front end and monitors them in real time through the computer display screen and sound card.
When an alarm occurs, the alarm decoder will link the alarm output device, and input the alarm signal to the RV-2000 video terminal through the alarm decoder, and transmit it to the monitoring center, the video of the monitoring center The server After receiving the alarm signal, sound signal will be sent immediately, alarm events will be recorded, hard disk recording and other alarm operations will be performed.
The camera control, deployment and other control signals are transmitted in the downlink. The monitoring host in the monitoring center sends out various control signals. After receiving the control signal, the RV-2000 video acquisition terminal passes through the pan tilt lens controller Or directly control the camera, or complete the deployment operation.
The system adopts the hardware compression software decompression technology, and the remote video monitoring function can be realized by adding the corresponding software on the computer terminal of the relevant department or through the Web function of the IE browser provided by Windows, which can be set as a video monitoring workstation.
TCP/IP and Multicast technologies are used for network communication to maximize the transmission performance and network bandwidth of the network and avoid network congestion.
4.3 System structure RV-2000 remote video monitoring system consists of system sub station and dispatching center master station. The system sub station is set up in subordinate coal mines, power plants, substations and other places that need monitoring. It is mainly composed of video acquisition terminals, computer network connection equipment, cameras, alarm probes, alarm decoders, etc., and is responsible for the collection and digitization of audio and video signals and alarm signals, The existing computer network is used to realize video/alarm information transmission and remote monitoring between stations and the dispatching center. The main station of the monitoring and dispatching center is mainly composed of video management server, browser, computer network connection equipment, remote monitoring and video server software. The monitoring center can manage multiple acquisition stations through the network, and can switch and control to any monitoring point site to implement overall monitoring, so as to realize video monitoring of the entire region. Through the network, it can not only browse the live video of each monitoring point in real time, but also remotely access the video files of the collection station, download the video files, and record in the monitoring center. RV-2000 remote video monitoring system can adapt to different communication networks, and can be Ethernet, E1, WLAN or other transmission channels.
2、 System advantages
With the help of remote monitoring, the information network (Intranet) inside the enterprise can be effectively connected with the control network, so that the production and operation conditions can be grasped at any time, and the production and operation conditions can be closely combined with the enterprise's business management strategy, so as to realize the comprehensive automation of the enterprise, and the monitoring data and online knowledge resource database within the network can be established. Through remote monitoring, real-time collection and rapid concentration of on-site operation data can be realized, and on-site monitoring data can be obtained, which provides a material basis for remote fault diagnosis technology; Through remote monitoring, technicians can monitor and control the operation status and various parameters of the production system and field equipment without visiting the site or harsh environment in person, so as to enable the trained personnel. Virtual. In many monitoring locations, it is convenient to use the rich local software and hardware resources to carry out advanced process control on remote objects to maintain the normal operation of equipment, thus reducing the number of on duty staff, and ultimately achieving unattended or few on duty at the remote end, so as to achieve the goal of reducing staff and increasing efficiency.
More and more enterprise groups are developing across regions. Using network technology to realize remote monitoring is of great significance for enterprises to reduce production costs, improve labor productivity, improve the scientific and technological content of their products, and enhance their comprehensive competitive strength.
