Small bridge structure dynamic deformation non-contact measurement method

The invention relates to the technical field of structure dynamic deformation measurement, and in particular relates to a small bridge structure dynamic deformation non-contact measurement method. Themethod comprises the steps of S1 transmitting frequency modulation continuous waves to a target to be measured, and receiving radar echo signals reflected by the target; S2 processing the echo signalreceived by the RX channel to obtain an IF signal, and performing data discretization sampling on the IF signal to obtain two paths of signals; S3 performing recombination operation on the two pathsof signals to obtain complex representation of discrete signals; S4 performing data processing on the complex representation of the discrete signal to obtain target information; and S5 performing phase demodulation on the data according to the target information to obtain structure dynamic deformation information. The method is high in measurement precision, is less affected by environmental factors, can achieve the all-tim