Ultrasonic guided wave multipath probability imaging method and system

The invention discloses an ultrasonic guided wave multipath probability imaging method and system. The method comprises the following steps: firstly, analyzing the propagation characteristics of ultrasonic guided waves in a carbon fiber structure, obtaining a finite number of propagation velocities through finite element simulation, obtaining a circumferential guided wave propagation velocity in combination with a binomial fitting method, and creating an angle-velocity dictionary; calculating the flight time of a grid point sensing path in advance; using a Hilbert envelope peak method to extract the arrival time of the damage scattering signal; then, estimating the damage probability of each sensing path by comparing the difference between the absolute values of the scattering signal time of flight (ToF) of the damage part and the scattering signal time of flight (ToF) of the grid point and defining a scale control function; and finally, fusing the damage probabilities of all the paths to obtain the total dam