Method for detecting external thermal insulation defect of external wall based on ground penetrating radar

The invention relates to a method for detecting external thermal insulation defects of an external wall based on a ground penetrating radar, and the method comprises the steps: building a test database, and pre-storing detection images of defects under different external thermal insulation materials in a test process; setting parameters of the ground penetrating radar, and enabling the ground penetrating radar to move along a certain direction to detect defects; and comparing a detection image of the ground penetrating radar with a pre-stored image, and judging whether a defect exists or not. According to the method for detecting the exterior wall external thermal insulation defects based on the ground penetrating radar, a detection method different from an existing exterior wall external thermal insulation detection method is provided, the ground penetrating radar is used for establishing test defect images for different detection reactions of different media, and the test defect images are compared with act