How to realize accurate positioning of tunnel personnel positioning system?

The personnel positioning system of Woxu communication technology tunnel deploys high-power positioning base stations in the tunnel, covering a distance of 400 meters. Distribute high-power positioning tags to people entering the tunnel, and effectively obtain basic information, time information, quantity information, accurate location information, etc. Construction workers and outsiders enter the tunnel entrance with a positioning accuracy of 30cm. Managers can also issue alarm tips through the platform to improve the response speed of incident rescue.