A phased array imaging detection device and method for a steel skeleton polyethylene composite pipe

Abstract

A phased array imaging detection device and method for a steel skeleton polyethylene composite pipe, an ultrasonic phased array detector and a phased array linear array probe; the ultrasonic phased array detector includes a computer, a signal acquisition module and a display module, and a phased array detector The linear array probe is connected with the ultrasonic phased array detector; the computer is connected with the phased array linear array probe, the phased array linear array probe is connected with the signal acquisition module, the signal acquisition module is connected with the computer, and the computer is connected with the display module; by setting two A line-scan channel is quickly switched to form two B-scan images during the detection process, and then a new fusion B-scan image is formed after computer processing, and the relevant A-scan signals are retained. According to the detection and imaging results, fast and efficient online real-time imaging detection of steel skeleton polyethylene composite pipes is realized, and the problem of detection blind spots is greatly improved from the detection technology. At the same time, it can also perform positioning analysis and data storage for the internal defects of the steel skeleton polyethylene composite pipe wall.

Description

technical field [0001] The invention relates to a phased array imaging detection device and method for a steel skeleton polyethylene composite pipe, which can perform ultrasonic phased array imaging detection for such complex-structured pipe body, and belongs to the technical field of ultrasonic nondestructive testing. Background technique [0002] The steel skeleton polyethylene plastic composite pipe is made of low carbon steel wire as the reinforcement phase and high density polyethylene (HDPE) as the matrix. The steel wire is spot welded into a mesh and the plastic extrusion filling is carried out simultaneously, and it is continuously extruded on the production line. Double-sided anti-corrosion pressure pipes. The polyethylene is connected together through metal mesh, and the pipe structure is similar to reinforced concrete. At home and abroad, there are many researches on ultrasonic testing and phased array ultrasonic testing technology of PE pipe welded joints withou...

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Problems solved by technology

[0004] Compared with ordinary polyethylene pipes, the molding process of steel skeleton polyethylene composite pipes is complicated, and the spot welding of steel wires and plastic extrusion filling are carried out simultaneously, so the probability of quality defects in the pipe body increases, so it is very necessary to On the other hand, the structure of steel skeleton polyethylene composite pipe is complex, if conventional ultrasonic phased array technology is used for nondestructive testing, the axial and circumferential steel wire skeleton existing in the pipe body will cause strong reflection of ultrasonic waves , thus forming a large detection blind zone, such as image 3 and Figure 4 As shown, it is impossible to achieve non-destructive testing by conventional technical means

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