Ultrasonic inspection system and ultrasonic inspection method

An ultrasonic inspection method, in an ultrasonic inspection system that includes an ultrasonic inspector and a controller controlling the ultrasonic inspector and causes an ultrasound beam to enter an object through a gas for inspection of the object,

• the ultrasonic inspector including:
• a transmission probe emitting the ultrasound beam;
• a reception probe mounted on an opposite side of the object from the transmission probe;
• and
• a distance adjuster that adjusts an eccentric distance between a transmission sound axis of the transmission probe and a reception sound axis of the reception probe to a distance greater than zero, wherein
• the transmission probe and the reception probe perform scanning while keeping the eccentric distance in an x-axis direction or a y-axis direction on condition that an x-y plane is approximately parallel to a bottom of the object, and
• the transmission probe is mounted such that the transmission sound axis is perpendicular to the x-y plane,
• the controller executing:
• an ultrasound beam emission step of emitting an ultrasound beam from the transmission probe;
• a scattered wave reception step of in the reception probe, receiving a scattered wave which is scattered due to a defect of the object;
• and
• a waveform analysis step of generating signal strength data based on a signal of the received scattered wave.

An ultrasonic inspection system that causes an ultrasound beam to enter an object through a gas for inspection of the object, the device comprising:

• a transmission probe emitting the ultrasound beam;
• a reception probe mounted on an opposite side of the object from the transmission probe;
• and
• a distance adjuster that adjusts an eccentric distance between a transmission sound axis of the transmission probe and a reception sound axis of the reception probe to a distance greater than zero,
• wherein the reception probe has a focal range greater than the transmission probe.

An ultrasonic inspection system that causes an ultrasound beam to enter an object through a gas for inspection of the object, the device comprising:

• a transmission probe emitting the ultrasound beam;
• a reception probe mounted on an opposite side of the object from the transmission probe;
• and
• a distance adjuster that adjusts an eccentric distance between a transmission sound axis of the transmission probe and a reception sound axis of the reception probe to a distance greater than zero,
• wherein the reception probe has a beam incident area greater than the transmission probe.

An ultrasonic inspection system that causes an ultrasound beam to enter an object through a gas for inspection of the object, the device comprising:

• a transmission probe emitting the ultrasound beam;
• a reception probe mounted on an opposite side of the object from the transmission probe;
• and
• a distance adjuster that adjusts an eccentric distance between a transmission sound axis of the transmission probe and a reception sound axis of the reception probe to a distance greater than zero,
• wherein the reception probe includes a plurality of the reception probes, and
• further comprising a defect information determiner that receives outputs from the plurality of reception probes through a signal processor and determines which reception probe among the plurality of reception probes has detected a scattered wave from a defect.

An ultrasonic inspection system that causes an ultrasound beam to enter an object through a gas for inspection of the object, the device comprising:

• a transmission probe emitting the ultrasound beam;
• a reception probe mounted on an opposite side of the object from the transmission probe;
• and
• a distance adjuster that adjusts an eccentric distance between a transmission sound axis of the transmission probe and a reception sound axis of the reception probe to a distance greater than zero,
• wherein the reception probe includes a plurality of the reception probes, and
• wherein the plurality of reception probes are radially arranged around the transmission sound axis of the transmission probe.