Tunnel cambered surface collapse detection device

The tunnel cambered surface collapse detection device comprises frames, a detection part and a central control panel, the frames are arc-shaped metal plates with openings in the bottoms, the frames are arranged in parallel in the front-back direction of the detection device, the tail ends of the frames are welded to the outer side of a supporting plate, a support is installed at the top of a transverse plate, and the detection part is connected with the central control panel. A rotating shaft is arranged in the axis direction of the frame, the two ends of the rotating shaft are rotationally erected on the top of the support, the rotating shaft is driven by a motor fixed to the support, and at least one detection part is arranged in the middle of the side face of the rotating shaft and comprises a detection rod fixedly connected with the side face of the rotating shaft. A movable rod is arranged above the detection rod in the axis direction of the detection rod, the pressure sensing device is electrically conn