Brief Introduction: Tunnel wireless monitoring system

The monitoring system has made new breakthroughs in the wireless age, especially in China. Our country has a complex terrain and a vast territory. We want to monitor tunnels in such a complex environment, wired monitoring is always limited, so the birth of the wireless monitoring system has injected fresh blood into the monitoring system.

In the Monitoring System Application of the tunneling industry, the solution represented by the current wireless monitoring system is more practical and efficient. For the tunnel wireless monitoring solution, BITWAVE, a professional wireless transmission brand dedicated to video monitoring, has distinctive characteristics. First, BITWAVE, after a long period of time on the actual situation of tunnel construction and management, closely combined with the tunnel construction process and monitoring and operation management needs in many aspects, on the basis of ensuring to adapt to the complex environment of various tunnels, using the most mature microwave communication product-Wireless Bridge, we have launched an advanced wireless tunnel monitoring system, this solution provides a professional tunnel security system through advanced wireless network transmission systems and advanced video technology.

Although video surveillance is a mature application, due to the fact that tunnels are special road sections, there are common features such as large depth, narrow space environment, large light changes, and unclear vision, therefore, there is a greater potential accident risk than the general environment, especially on roads with many tunnels. In the case of fire and other emergencies, the transportation guidance and rescue work are very different from the normal road section, moreover, the consequences of secondary accidents are far more serious than that of primary accidents. Therefore, the security guarantee in long tunnels is the most important issue for the management department in the construction and operation of tunnels, advanced wireless monitoring systems will play an important role.

With the successful experience and rich wireless link planning experience accumulated in Wireless Video Surveillance industry applications, BITWAVE's monitoring system is very practical in tunneling monitoring applications, moreover, the system features high stability, reliability, investment protection, and cost reduction. With this wireless monitoring system, the construction and management departments of the tunnel can efficiently improve the production safety index, and ensure the safety of primary vehicle tunneling and roof laying during the construction phase of the tunnel, and later traffic monitoring, environmental monitoring, ventilation control, lighting control, television, video monitoring, fire alarm, cross-Channel door monitoring, central monitoring and other links provide great help to the management department.

In the BITWAVE solution, the length of the existing tunnel under construction is about 5 ~ About 10 km, to ensure the safety of construction engineers and the visibility of the construction process, cameras are mainly installed on Excavation vehicles and laying-top vehicles, and the video code stream is set to about 2 m, as the construction of the tunnel continues to advance, you can learn the construction of the tunnel in real time in the monitoring room of the management center outside the tunnel. As shown in, one BWB310 wireless device is installed on each construction vehicle. In a 10 km tunnel, when the distance increases, the signal decreases and the image transmission is affected, alternatively, when the tunnel inflection point encounters a non-linear occlusion, select an appropriate location to install the relay node device. In practice, without considering the occlusion, two BWB310 devices are built every 2.5 kilometers away. One of them is used to receive video data from a mobile vehicle and is uploaded back to the next-level wireless device, A BWB310 wireless device is installed at the entrance of the tunnel to receive video data and provide real-time video data for the monitoring center for management.

The system can be used with zero configuration and is not limited by the length of the tunnel. The relay point equipment can be added anytime and anywhere as the tunneling progresses to ensure smooth connection of wireless network links;

As shown in, a camera, BWB310 wireless device, and equipment box are installed on the construction vehicle. The camera collects images and transmits the analog line number to the encoder through the vgaline. The video signal is converted to a digital signal through the encoder, and the video data is transmitted through the bridge through the network cable. With the continuous tunneling of vehicles, video data is returned step by step.

In the BITWAVE monitoring system, after successfully constructing a wireless network in the tunnel, in addition to completing the main video monitoring, it can also meet the needs of users who need tunnel communication, in particular, traditional communication methods are very difficult and ineffective in the face of long tunnels. This scheme uses a relatively low cost to organically integrate vehicles and TBM machines outside the cave, in the cave, and continuously moving into a unified whole, the image information of the monitoring site is accurate, clear, and quickly transmitted to the monitoring center, and a wireless coverage network can be established in the tunnel, wi-Fi mobile phones can be used for free communication on battery vehicles, VMS, or other construction personnel in tunnels.