1：Experimental Design and Method Selection:

The methodology involves using guided wave ray tomography with TOF temperature compensation. The linear relationship between the TOF of guided waves and temperature is utilized to compensate for temperature variations without estimating compensation parameters. The inversion is based on optimizing the TOF misfit function between inspected and compensated baseline TOFs using the elastic net penalty approach.

2：Sample Selection and Data Sources:

Experiments are conducted on isotropic plates using piezoelectric sensors. The plates are subjected to temperature variations from 25 ?C to 70 ?C to simulate real-world conditions.

3：List of Experimental Equipment and Materials:

Piezoelectric transducers (PZTs) with a diameter of 5 mm and a central frequency of 250 kHz are used. The experimental setup includes a temperature testing box with a temperature control accuracy of 0.1 ?C.

4：1 ?C. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The baseline and reference TOFs are extracted at different temperatures. Defects are introduced into the plates, and the inspected TOFs are recorded at varying temperatures. The TOFs are compensated based on temperature measurements, and damage imaging is performed using the elastic net penalty approach.

5：Data Analysis Methods:

The TOFs are analyzed using the elastic net penalty technique to perform thickness change mapping. The effectiveness of the method is evaluated by comparing the imaging results with conventional ray tomography methods.