Welding seam flaw detection system for tank body

The utility model provides a weld joint flaw detection system for a tank body. The weld joint flaw detection system comprises an emitter, a receiver, two mechanical arms, a mechanical arm controller and a processing circuit. Execution ends of the two mechanical arms are connected with the emitter and the receiver respectively, and the mechanical arm controller is electrically connected with the mechanical arms. The mechanical arm controller controls the motion trail of the mechanical arm, so that flaw detection rays emitted by the emitter penetrate through the weld joint of the tank body, andthe receiver receives the flaw detection rays penetrating out of the weld joint to be detected; and the processing circuit is electrically connected with the receiver, and the processing circuit generates a corresponding digitized image of the weld joint to be detected according to a receiving result of the receiver. According to the embodiment of the utility model, the digital imaging technologyand the programmable mecha