Abstract: Ultrasonic flaw detection uses a phased-array ultrasonic-flaw-detection probe. The flaw detection probe is placed such that the center of curvature of the flaw detection probe coincides with a reference center of curvature of a subject. The flaw detection probe is translated along a scan direction. The flaw detection probe emits an ultrasonic beam such that the position upon which the ultrasonic beam converges coincides with the center of curvature of the curve of the outline of the cross section of the subject at the scan position, receives the resulting reflected beam, and estimates the length of a flaw in the circumferential direction of the subject. In addition, the estimated length of the flaw is corrected using a correction coefficient corresponding to the distance between the center of curvature of the reference scan position and the center of curvature of the scan position in the thickness direction of the subject.

Abstract: An ultrasonic flaw detection device comprises a flaw detection unit for transmitting and receiving ultrasound, a swinging mechanism for supporting the flaw detection unit to swing around a swinging axis, and a locking mechanism for switching between a swinging state and a locked state. The ultrasonic flaw detection device controls the locking mechanism and swinging mechanism such that when the flaw detection unit is moved along a direction tangential to a surface to be inspected from a position removed from a first end part of the surface to be inspected to a lock release position, the flaw detection unit is put in the locked state such that a direction tangential to a contact surface and the direction tangential to the surface to be inspected coincide, and the flaw detection unit is switched from the locked state to the swinging state after the flaw detection unit reaches the lock release position.

Abstract: Ultrasonic flaw detection uses a phased-array ultrasonic-flaw-detection probe. The flaw detection probe is placed such that the center of curvature of the flaw detection probe coincides with a reference center of curvature of a subject. The flaw detection probe is translated along a scan direction. The flaw detection probe emits an ultrasonic beam such that the position upon which the ultrasonic beam converges coincides with the center of curvature of the curve of the outline of the cross section of the subject at the scan position, receives the resulting reflected beam, and estimates the length of a flaw in the circumferential direction of the subject. In addition, the estimated length of the flaw is corrected using a correction coefficient corresponding to the distance between the center of curvature of the reference scan position and the center of curvature of the scan position in the thickness direction of the subject.

Abstract: A method of evaluating equivalence of detection performances of an object to be photographed using a film image and a digital image. The method includes acquiring digital images of the object with varying values of an influence parameter; acquiring digital detection limit values of the respective digital images; specifying a digital detection limit value with highest detection performance from the digital detection limit values; determining that there is equivalence when the specified digital detection limit value is equal to or more than a film detection limit value of the film image, because the detection performance of the object using the digital image assures the detection performance of the object using the film image; and determining that there is no equivalence when the specified digital detection limit value is smaller than the film detection limit value.

Abstract: An impact sensing laminate 2 has a first surface 211 on which an impact force acts; a second surface 222 brought in contact with a protection object OBJ; an impact absorption layer 21 and a first pressure-sensitive layer 22. When a direction heading for the second surface from the first surface is defined as a first direction, the first pressure-sensitive layer is in the first direction from the impact absorption layer. The first pressure-sensitive layer is a layer of sensing a first impact force as the impact force to have been attenuated by the impact absorption layer.

Abstract: A supersonic inspection jig has an insertion section 22 inserted into a hole 10 of an inspection target 1, and a flange section 23 connected with the insertion section 22 and contacting the inspection target 1. The flange section 23 has a flange section first surface 231 which is a surface on the side contacting the inspection target 1 and a flange section second surface 232 which is a surface on the side contacting the probe 41. A position limiting section 26 is provided on the flange section second surface 232 to limit the position of the probe 41 so that the probe 41 is maintained in a position separate from a central axis C of the hole 10. Thus, the inspection around the hole becomes easily executable.

Abstract: In an artificial defect material 10 of an FRP structure, a heat-resistant high-linear-expansion material 20 arranged between the layers thermally expands in case of high-temperature shaping of the FRP structure, so that a predetermined shape is shaped between a plurality of layers of the fiber reinforcing base material 14 and the material 20 thermally shrinks at the room temperature after the shaping, so that a space is formed due to the shrinkage difference from the fiber reinforcing base materials 14. The material 20 has a linear expansion coefficient larger than that of the FRP structure by a predetermined value or more, and has the shape keeping property and the heat resistance to endure the shaping temperature.

Abstract: A method of evaluating equivalence of detection performances of an object to be photographed using a film image and a digital image. The method includes acquiring digital images of the object with varying values of an influence parameter; acquiring digital detection limit values of the respective digital images; specifying a digital detection limit value with highest detection performance from the digital detection limit values; determining that there is equivalence when the specified digital detection limit value is equal to or more than a film detection limit value of the film image, because the detection performance of the object using the digital image assures the detection performance of the object using the film image; and determining that there is no equivalence when the specified digital detection limit value is smaller than the film detection limit value.

Abstract: An impact sensing laminate 2 has a first surface 211 on which an impact force acts; a second surface 222 brought in contact with a protection object OBJ; an impact absorption layer 21 and a first pressure-sensitive layer 22. When a direction heading for the second surface from the first surface is defined as a first direction, the first pressure-sensitive layer is in the first direction from the impact absorption layer. The first pressure-sensitive layer is a layer of sensing a first impact force as the impact force to have been attenuated by the impact absorption layer.

Abstract: A probe provided with a transceiving surface longer in a length direction than in a width direction thereof, and an array of ultrasonic elements provided on the transceiving surface, the probe being for emitting ultrasonic waves to a surface to be inspected of an object to be inspected that faces the transceiving surface, while moving in the width direction, the ultrasonic elements being shaped so as to have the same length in the length direction and in the width direction, and the certain of ultrasonic elements being aligned in the length direction and in the width direction and emitting ultrasonic waves a large number of times throughout the length direction in predetermined emission units of one or more ultrasonic elements.

Abstract: A supersonic inspection jig has an insertion section 22 inserted into a hole 10 of an inspection target 1, and a flange section 23 connected with the insertion section 22 and contacting the inspection target 1. The flange section 23 has a flange section first surface 231 which is a surface on the side contacting the inspection target 1 and a flange section second surface 232 which is a surface on the side contacting the probe 41. A position limiting section 26 is provided on the flange section second surface 232 to limit the position of the probe 41 so that the probe 41 is maintained in a position separate from a central axis C of the hole 10. Thus, the inspection around the hole becomes easily executable.

Abstract: An ultrasonic flaw detection jig includes a base section with which a probe of the ultrasonic inspection apparatus is brought into contact; and a prominence section provided for the base section and inserted into an inspection object hole of an inspection object. The inspection object hole includes a countersunk section connected with a main surface of the inspection object and extending from the main surface while reducing a diameter; and a connection section connecting a bottom of the countersunk section and the rear surface of the inspection object. The prominence section has a conical shape corresponding to the shape of the countersunk section.

Abstract: In an artificial defect material 10 of an FRP structure, a heat-resistant high-linear-expansion material 20 arranged between the layers thermally expands in case of high-temperature shaping of the FRP structure, so that a predetermined shape is shaped between a plurality of layers of the fiber reinforcing base material 14 and the material 20 thermally shrinks at the room temperature after the shaping, so that a space is formed due to the shrinkage difference from the fiber reinforcing base materials 14. The material 20 has a linear expansion coefficient larger than that of the FRP structure by a predetermined value or more, and has the shape keeping property and the heat resistance to endure the shaping temperature.

Abstract: A probe provided with a transceiving surface longer in a length direction than in a width direction thereof, and an array of ultrasonic elements provided on the transceiving surface, the probe being for emitting ultrasonic waves to a surface to be inspected of an object to be inspected that faces the transceiving surface, while moving in the width direction, the ultrasonic elements being shaped so as to have the same length in the length direction and in the width direction, and the certain of ultrasonic elements being aligned in the length direction and in the width direction and emitting ultrasonic waves a large number of times throughout the length direction in predetermined emission units of one or more ultrasonic elements.

Abstract: An ultrasonic flaw detection jig includes a base section with which a probe of the ultrasonic inspection apparatus is brought into contact; and a prominence section provided for the base section and inserted into an inspection object hole of an inspection object. The inspection object hole includes a countersunk section connected with a main surface of the inspection object and extending from the main surface while reducing a diameter; and a connection section connecting a bottom of the countersunk section and the rear surface of the inspection object. The prominence section has a conical shape corresponding to the shape of the countersunk section.