Bridge amount of deflection detects fast from anping device

The utility model discloses a bridge amount of deflection detects fast from anping device, including the casing, the casing internalization is provided with the simple pendulum axle, simple pendulum axle end -to -end connection laser generator, the epaxial winding of simple pendulum has induction coil, still is provided with excitation coil in the casing and organizes and add the motor structure, constructs to be used for organizing for excitation coil with the motor and applys the electric current. The utility model discloses utilizing to construct to organize for excitation coil with the motor and switching on, the excitation coil group after the circular telegram produces magnetic field, and the simple pendulum axle produces the motion of induced magnetic field, induced magnetic field hindrance simple pendulum axle at wobbling in -process, the interior production induced -current of induction coil, induced -current to make the single -pendulum swing of simple pendulum axle tend to with the fastest speed an