Bridge dynamic deflection distributed measuring device and measuring method

The invention discloses a distributed measuring device and method for dynamic deflection of a bridge. The measuring device comprises a sensing link, an annular clamping component and a mounted bearing. The annular clamping component is fixed on the outer circumference of the sensing link through mechanical connection, the sensing link is tightly connected with the mounted bearings on the two sides through the annular clamping component, and the mounted bearings are fixed at the bottom of a bridge or in a box girder through adhesion or mechanical connection. The sensing link comprises a spring steel rod and strain sensors, and the strain sensors are fixed to the upper outer surface and the lower outer surface of the spring steel rod at certain intervals. After the bridge deforms, the measuring device deforms cooperatively, and the strain sensor captures the surface strain change of the sensing link and inputs the measured value into the dynamic deflection measuring method. According to the device, distributed