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Traditional ultrasonic testing system has fixed focus, which is burdensome for layer inspection of welds because different layer needs different steering angle and focus ultrasonic beam to inspect. Ultrasonic phased array testing instrument can electronically steer and focus the transmission ultrasonic beams. This ability makes it very advantageous in automatic nondestructive testing in industrial...
An automatic ultrasonic phased array inspection system used for nondestructive testing (NDT) of pipeline girth weld is developed. The linear phased array transducer is optimized by numerical analysis based on a mathematical model. Then hardware and software designs of the system are presented, realizing dynamically focusing in the detection area. A series of technological difficulties are solved....
Based on electronic deflection and focusing characteristics, ultrasonic phased array technology is used in flaw detection of girth welds for big diameter long distance pipelines, which overcomes the shortcomings in traditional ultrasonic nondestructive testing. Aimed at the detection requirements, a numerical analysis and modelling of a linear phased array transducer are carried out in this article...
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