Patent
Flaw detection method and flaw detection device for weld zone using tofd method
TLDR
In this article, the authors proposed a TOFD-based flaw detection method for a weld zone using a transmission-side probe 12 and a reception-sensor probe 11 arranged across the weld zone 60.Abstract:
PROBLEM TO BE SOLVED: To provide a flaw detection device for a nozzle and its method that can easily calculate a position of a flaw of a nozzle connected by welding in a TOFD method.SOLUTION: A flaw detection device for a weld zone using a TOFD method includes a transmission-side probe 12 and a reception-side probe 11 arranged across a weld zone 60. The transmission-side probe 12 transmits an ultrasonic beam to the weld zone 60 at 60° and the reception-side probe 11 receives a diffracted wave of the ultrasonic beam from a flaw 70 of the weld zone 60. The device further includes: elliptic track calculation means for calculating an elliptic track such that the ultrasonic wave from the transmission-side probe 12 to the reception-side probe 11 is equal in propagation path length; echo height calculation means for calculating echo heights of a plurality of diffracted waves on the calculated elliptic track by changing a plurality of reception angles of the reception probe; and flaw position calculation means for calculating a position of a flaw of the weld zone on the basis of the elliptic track calculated by the elliptic track calculation means and the echo heights calculated by the echo height calculation means.read more
Citations
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Patent
Time of flight diffraction (TOFD) detection method capable of confirming defect size and location parameters
TL;DR: In this paper, a time-of-flight diffraction (TOFD) detection method capable of confirming the defect size and the location of a welding seam is presented. But the method comprises the steps of firstly arranging a transmitting probe at one side of welding seam and two receiving probes at the other side of the welding seam; and after that, establishing an elliptical mathematical model, programming by matlab software, and solving by calculation.
Patent
Ultrasonic TOFD (Time of Flight Diffraction) detection method for T-shaped welding joint
TL;DR: In this paper, an ultrasonic TOFD (Time of Flight Diffraction) detection method for a T-shaped welding joint was proposed, which relates to the field of ultrasonic waves.
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TOFD check process for inner wall defects of nuclear power thick-wall austenite steel pipelines
TL;DR: In this article, a TOFD check process for inner wall defects of nuclear power thick-wall austenite steel pipes is described, where a relatively large probe diameter is adopted to improve the measurement precision and resolution of the defects at the inner wall.
References
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Patent
Ultrasonic flaw detector
TL;DR: In this article, a transducer group with a plurality of transducers arranged in an arc shape or the like is attached to a first wedge 17, and the ultrasonic emission surface 17a of the first wedge is a concave shape.
Patent
Ultrasonic flaw detection method and its system
TL;DR: In this paper, the ultrasonic sounds from one side of different position of the flaw detection part 2 were transmitted from the 2 transmission probes 3, 4 to the other side of the fault detector part 2 from the reception probes 5, 6.