Steel pipe detection method and system based on phased array technology

The invention relates to a steel pipe detection method and system based on a phased array technology, and the method comprises the steps: setting scanning parameters of a phased array element set and a delay rule matched with the scanning parameters of the phased array element set through the parameters of the phased array element set, so that a steel pipe can be scanned through the phased array element set without moving a probe or moving the probe as little as possible; the delay rule acts on the phased array element set, the acoustic beam angle, the focal column position and the size and position of the focus generated by the phased array element set are continuously and dynamically adjustable within a certain range, and the acoustic beam can be quickly translated, so that different wall thickness layers of the steel pipe wall can reflect acoustic waves, and before the steel pipe is detected, the detection accuracy is improved. And performing sensitivity calibration on the phased array element set by using