Underground well chamber defect detection method and corresponding device thereof

The embodiment of the invention discloses an underground well chamber defect detection method and a corresponding device thereof, and the method comprises the steps: placing a camera and a laser ranging module in the center of a well chamber, projecting a straight line on the well chamber through the laser ranging module, and then obtaining the image of the well wall, the image of the well top and the image of the well bottom through the camera; performing image distortion correction processing on the acquired image, performing seamless splicing on the well wall image based on a horizontal line in the image, calibrating the spliced well chamber image according to the perimeter of the well wall, and drawing a defect range in the calibrated well wall image; and finally, establishing a three-dimensional model of the well chamber according to the well wall image, the well bottom image and the well top image with the drawn defect range and the radius. According to the scheme, defect detection and establishment of