A method for automatically identifying the defect type of a polyethylene electrofusion joint by means of ultrasonic phased array inspection. The method comprises: capturing a two-dimensional real-time scanning image of an ultrasonic phased array inspection map of a polyethylene electrofusion joint obtained by using an ultrasonic inspection system and performing digital processing; extracting and simplifying graphic features after matrix optimization and partitioning, and then classifying defect features; establishing an automatic defect identification criterion to determine the defect type, and determining quantitative information according to a specified defect characterization rule.
METHOD FOR AUTOMATICALLY IDENTIFYING DEFECT TYPE OF POLYETHYLENE ELECTROFUSION JOINT BY MEANS OF ULTRASONIC PHASED ARRAY INSPECTION