Device for measuring dynamic deflection of bridge

The utility model relates to the technical field of bridge detection, in particular to a device for measuring dynamic deflection of a bridge, which comprises a hollow shell, a controller and a sensor are mounted in the shell, a pendant is arranged on the upper portion of the sensor, a via hole is arranged at the top of the shell, and the pendant penetrates through the via hole to be connected with a bridge body of the bridge. The controller is used for transmitting data measured by the sensor to the upper computer; the bottom of the pendant is a plane; and a leveling mechanism is arranged at the bottom of the shell. The shell is connected with a bridge body of a bridge through the connecting piece, after the shell is leveled through the leveling mechanism, the sensor measures the distance between the sensor and the bottom of the pendant, if the deflection of the bridge changes, the distance between the pendant and the sensor can be reduced, and a deflection curve can be obtained according to data measured by