Bridge dynamic deflection detection method and device based on microwave interference

The invention discloses a bridge dynamic deflection detection method and device based on microwave interference. The method includes the steps: S1 acquiring geometrical characteristic parameters of a microwave interference detection system for a bridge to be detected in the detection process, and acquiring atmospheric dry temperature, atmospheric steam partial pressure and atmospheric dry air partial pressure in detection; S2 calculating an atmospheric refraction index in detection according to the atmospheric dry temperature, the atmospheric steam partial pressure and the atmospheric dry air partial pressure; S3 calculating dynamic deflection of the bridge in detection by a bridge dynamic deflection correction model according to the atmospheric refraction index and the geometrical characteristic parameters. According to the method, the influence of the atmospheric dry temperature, the atmospheric steam partial pressure and the atmospheric dry air partial pressure on the microwave propagation process is taken