| CPC G01N 29/069 (2013.01) [G01N 29/0609 (2013.01); G01N 29/0672 (2013.01); G01N 29/11 (2013.01); G01N 29/12 (2013.01); G01N 29/265 (2013.01); G01N 29/4409 (2013.01); G01N 29/48 (2013.01); G01N 2291/015 (2013.01); G01N 2291/106 (2013.01); G01N 2291/267 (2013.01)] | 24 Claims |

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1. A weld inspection method, comprising:
transmitting an ultrasonic wave to a weld portion at a transmission angle;
detecting an intensity of a reflected wave from the weld portion at a plurality of points in a transmitting direction of the ultrasonic wave; and
setting the transmission angle based on a tilt angle, the tilt angle indicating a tilt of the weld portion and being calculated using a gradient of the intensity for each of the plurality of points.
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