Alarm device for measuring displacement of foundation pit

The invention discloses an alarm device for measuring displacement of a foundation pit, and belongs to the technical field of foundation pit measurement. According to the technical scheme, the alarm device is characterized by comprising a top plate and an intelligent control system, the top of the top plate is fixedly connected with a shielding frame, a motor is fixedly connected to the position, located in an inner cavity of the shielding frame, on the left side of the top of the top plate through a supporting seat, an output shaft of the motor is fixedly connected with a threaded rod, the other end of the threaded rod is movably connected with the inner wall of the shielding frame through a bearing, and the surface of the threaded rod is in threaded connection with a threaded sleeve. The problems that in an existing alarm device for measuring displacement of a foundation pit, due to the fact that the structure mostly adopts bolt fixing or welding fixing, adjusting is inconvenient during use, consequently, t