Submarine pipeline wall thickness detection device and detection method thereof

The invention relates to the technical field of pipeline detection, in particular to a submarine pipeline wall thickness detection device and a detection method thereof.The submarine pipeline wall thickness detection device comprises a hollow cylinder, a telescopic driven wheel, a telescopic driving wheel, a telescopic ultrasonic side thickness system and a cable; a driven wheel matching groove, a driving wheel matching groove and a probe matching hole are formed in the outer wall of the cylinder body, a fixing column is arranged in the cylinder body, and the two ends of the fixing column are fixed to the left side wall and the right side wall of an inner cavity of the cylinder body respectively; the telescopic driven wheel and the telescopic driving wheel are both installed on the barrel and matched with a driven wheel matching groove and a driving wheel matching groove in the barrel respectively, and the telescopic driven wheel, the telescopic driving wheel and the telescopic ultrasonic thickness measuring