Ultrasonic detection method for defect automatic identification auxiliary electric melting joint smart phased array

Abstract

The invention relates to the technology of plastic pipe electric melting joint detection and aims at providing an ultrasonic detection method for a defect automatic identification auxiliary electric melting joint smart phased array. The ultrasonic detection method comprises the steps of carrying out joint defect detection preparation, carrying out joint defect detection imaging and carrying out joint defect detection identification. Welding defect identification is realized through utilization of a defect automatic identification module based on a neural network algorithm. The welding defect identification comprises the content of preprocessing welding defect detection image data, carrying out classification identification on feature areas based on the neural network algorithm and carryingout safety assessment on typical defects. According to the method, typical defect automatic identification, real-time display and alarm prompt in a detection process are realized, dependence of a traditional phased array ultrasonic detection method on a qualification of a detector is overcome, and defect missing detection can be effectively avoided. According to a defect automatic identificationtechnology based on the neural network algorithm, operation speed is fast, complex defect identification accuracy is high, computing load of an ultrasonic detecting instrument can be reduced, and defect detection and identification are guaranteed to be displayed synchronously in real time.

Description

technical field [0001] The invention relates to a detection technology for plastic pipe electrofusion joints, in particular to a phased array ultrasonic detection method assisted by automatic defect recognition technology. Background technique [0002] Compared with metal pipes, plastic pipes have the advantages of corrosion resistance, good flexibility, light weight and long service life. They are widely used in building water supply and drainage, gas transmission and other fields. In recent years, they have been used in peripheral water pipelines of nuclear power plants. Very broad application prospects. For the consideration of transportation efficiency, the length of the pipeline is limited, and it is connected by welding process after being transported to the construction site. According to different welding processes, pipe connection joints can be divided into hot-melt butt joints and electro-fusion joints. At present, electro-fusion joints are the most used in engine...

AI Technical Summary

Problems solved by technology

However, this technology is for offline identification of data stored in ultrasonic testing, and the identification and detection are divided into two links, and the identification link depends on the detection link

In addition, this technology is implemented based on pattern recognition algorithm, which uses engineering experience as the reference basis for recognition, and the running speed is slow, and the recognition rate for complex actual defects is not high enough

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