The Tunnel Wind Speed and Direction Detector is specifically designed and manufactured for online monitoring of wind speed and direction within tunnels. It employs the principle of ultrasonic time difference to determine the wind speed and direction inside the tunnel. The detection probe is mounted on the tunnel wall, providing the tunnel control room with the wind speed and direction values for ventilation and operational purposes. The detector allows for real-time observation of the instrument's operational status and detection data. Additionally, the analog and switch signals from the data output interface can be connected to the local PLC in the nearby control room, and then transmitted to the central control room via data optical transceivers and optical fibers.