JP2005351718A - Omnidirectional flaw detection probe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an omnidirectional flaw detection probe capable of executing flaw detection inspection of a defect in a wide area of a specimen, in a short time, by the single probe. <P>SOLUTION: This omnidirectional flaw detection probe related to the present invention is provided with a plurality of oscillators arranged on a three-dimensional curved face to form a phased array. The omnidirectional flaw detection probe related to the present invention allows thereby at once the execution of the flaw detection inspection in the area of 360° along a circumferential direction of a normal, and of 0-90° as an angle formed with respect to the normal, as to the normal on an opposed face of the specimen. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flaw detection probe that performs flaw detection on a subject using a phased array type transducer arranged on a curved surface, and a flaw detection apparatus using the flaw detection probe.

  Non-destructive inspection is widely performed as inspection for detecting defects in metal containers and metal welds. Non-destructive inspection is extremely important for ensuring product reliability and safety during product operation.

  In particular, in a gas turbine combustor that is loaded with a high pressure in a high temperature environment, it is indispensable to periodically check safety by nondestructive inspection.

  For nondestructive inspection, an ultrasonic flaw detector using an ultrasonic flaw detection sensor (Ultrasonic Testing Sensor: UT sensor) is used. The ultrasonic flaw detection apparatus includes a UT sensor having a probe, a control unit that controls the operation of the UT sensor, a calculation unit that processes data acquired by the UT sensor, and a display that displays a processing result processed by the calculation unit. Department. Further, the probe includes a plurality of transducers that transmit and receive ultrasonic waves and a member having a flat surface or a curved surface on which the plurality of transducers are arranged.

  The basic operation principle of the UT sensor is that an ultrasonic wave is transmitted from a vibrator provided in the probe of the UT sensor toward the subject. When a defective portion exists in the subject, the transmitted ultrasonic wave is reflected by the defective portion, and the reflected wave is received by the transducer of the probe. The transducer of the probe serves as both an ultrasonic transmitter and a receiver, and the ultrasonic wave reflected by the transducer is received to identify a defective portion in the subject.

  UT sensor probes include those having a single transducer and those having a plurality of transducers.

  The probe including a single transducer is installed such that the ultrasonic transmission surface of the transducer is at an arbitrary angle with respect to the subject. That is, the probe is installed so that ultrasonic waves are transmitted to a predetermined examination site of a non-specimen. For this reason, when it is desired to inspect a plurality of locations on the subject, it is necessary to perform the inspection by installing a probe for each angle.

  On the other hand, there is a method called “phased array” as a typical probe having a plurality of vibrators, and a structure in which a plurality of vibrators are arranged one-dimensionally or two-dimensionally. Yes. Ultrasound is transmitted and received by two or more of the plurality of transducers arranged one-dimensionally or two-dimensionally. In this phased array type probe, the phase of the ultrasonic beam transmitted from the two or more transducers performing ultrasonic transmission / reception is electrically controlled by the control unit, thereby the direction of the ultrasonic beam. It is possible to scan the inside of the subject by electrically changing. As a result, if a phased array UT sensor having a phased array type probe is used, it is possible to electrically oscillate an ultrasonic beam without changing the installation angle on the subject. A defect in the object can be scanned and identified.

  FIG. 1 (1) shows a configuration of a normal UT sensor 2 including a probe having a single vibrator 1. FIG. 1B shows a configuration of a phased array UT sensor 3 including a probe having a plurality of phased array type transducers 1a, 1b, and 1c. The plurality of transducers 1a, 1b, 1c provided in the phased array UT sensor 3 shown in FIG. 1 (2) are arranged on a one-dimensional straight line, and the sensor is electrically one-dimensional. A scanning of the directional ultrasonic beam is performed.

  FIG. 2A shows a schematic diagram of ultrasonic transmission and reception in a normal UT sensor 2. The normal UT sensor 2 includes a flaw detector 9 and a multi-probe 11. The multi-probe 11 has a plurality of independent vibrators 12. Then, one corresponding transducer in one operation transmits and receives ultrasonic waves. For example, when the leftmost transducer in FIG. 2A operates, the leftmost pulsar / receiver 10 provided in the flaw detector 9 is first set as the pulsar, and the ultrasonic output instruction signal is output from the pulsar. The ultrasonic wave 13 is transmitted from the leftmost vibrator toward the subject. Next, the pulser / receiver 10 is switched to the receiver, and a reception instruction signal is transmitted from the receiver toward the same transducer that has transmitted the ultrasonic wave. When the ultrasonic wave is reflected by a defect in the subject, the reflected ultrasonic wave is received by the same vibrator that has transmitted the ultrasonic wave, and there is a defect in the subject. Is recognized. When this series of operations is completed, the same operation is sequentially performed on adjacent transducers.

  FIG. 2B shows a schematic diagram of transmission and reception of ultrasonic waves in the phased array UT sensor 3. The phased array UT sensor 3 includes a flaw detector 4 and a multi-probe 6. The multi-probe 6 has a plurality of transducers 7 that form a phased array.

Then, in one operation, the ultrasonic composite wave 8 is transmitted and received by two or more of the plurality of transducers 7. For example, when the leftmost three transducers in FIG. 2B operate, the leftmost three pulsars / receivers 5 provided in the flaw detector 4 are first set as pulsars, from which ultrasonic waves are output. An instruction signal is transmitted to each of the three transducers, and an ultrasonic synthesized wave 8 transmitted by the three leftmost transducers is transmitted toward the subject. At this time, the phase of the ultrasonic waves output from the three vibrators is electrically controlled by a control unit (not shown), and the ultrasonic waves transmitted by the leftmost three vibrators are controlled by this control. The direction of the synthesized wave 8 is electrically scanned within a specific range. As a result, the phased array UT sensor 3 can detect a wider range of subject parts in a single operation than the normal UT sensor 2. Next, the three leftmost pulsers / receivers 5 are switched to receivers, and reception instruction signals are sent to the same three transducers that transmit ultrasonic waves from the three leftmost pulsers / receivers 5. Is sent. Then, when the synthetic wave 8 is reflected by a defect in the subject, the reflected synthetic wave 8 is received by the same vibrator that has transmitted the ultrasonic wave, and the subject has a defect. It is recognized that it exists. When this series of operations is completed, the same operation is sequentially executed in a plurality of transducers of different combinations.

  FIG. 3A shows a test configuration in which the defect 15 provided on the test piece 14 is detected using the phased array UT sensor 3. The phased array UT sensor 3 is installed on the upper surface of the test piece 14, and a synthesized wave of ultrasonic waves is transmitted from the transducer provided in the probe 6 of the phased array UT sensor 3 toward the test piece 14. At this time, the region where the synthesized wave of the ultrasonic wave transmitted from the transducer provided in the probe 6 of the phased array UT sensor 3 can be scanned is indicated by a fan-shaped broken line in the test piece 14 in FIG. 3A.

  FIG. 3B shows flaw detection test results obtained using the test configuration of FIG. 3A. In FIG. 3B, the presence of a defect 15 in the specimen 14 is identified. However, if the defect 15 exists outside the scanning region of the phased array UT sensor 3, the presence of the defect 15 cannot be identified by the current test configuration, and the relative relationship between the phased array UT sensor 3 and the test piece 14 is not possible. It is necessary to shift the correct position and perform the flaw detection again.

  Several proposals related to the above technology have been made.

  For example, in “ultrasonic probe and ultrasonic oblique angle flaw detection method using the same” disclosed in JP-A-11-160294, a plate-like shoe having a planar shape formed in a fan shape, and an arc surface of the shoe In an ultrasonic probe comprising a group of transducers arranged one-dimensionally, an ultrasonic probe in which the beam exit surface of the shoe is inclined with respect to the fan-shaped surface of the shoe has been proposed.

  Further, in the “ultrasonic flaw detection method” disclosed in Japanese Patent Laid-Open No. 2001-343370, flaw detection is performed on a test piece made of the same material as the actual flaw detection target material by changing the incident angle of the ultrasonic wave transmitted from the probe. Thus, the incidence dependence data of the defect signal and the noise signal is obtained, the data weighting function is obtained from the incidence dependence data, and the incident angle of the ultrasonic wave transmitted from the probe to the actual flaw detection target material is determined. There has been proposed an ultrasonic flaw detection method for detecting a defect by improving the S / N ratio of flaw detection data by changing the flaw detection and weighting the actual flaw detection data with a data weighting function.

JP-A-11-160294 JP 2001-343370 A

  An object of the present invention is to provide a flaw detection probe capable of flaw detection in a wide three-dimensional range of a subject with a single probe.

  In the following, means for solving the problem will be described using reference numerals with parentheses used in [Best Mode for Carrying Out the Invention]. These symbols are added in order to clarify the correspondence between the description of [Claims] and the description of the best mode for carrying out the invention. ] Should not be used for interpretation of the technical scope of the invention described in the above.

  In the ultrasonic flaw detection probe of the present invention, a plurality of ultrasonic transducers (100A, 100B, 400A, 400B) forming a phased array and a plurality of ultrasonic transducers (100A, 100B, 400A, 400B) are arranged. And a member having a curved surface (200, 900, 1000).

  In the ultrasonic flaw detection probe of the present invention, the ultrasonic transducers (100A, 100B) have a vibration surface, and any of the three ultrasonic transducers among the plurality of ultrasonic transducers (100A, 100B). The normal of the vibration surface is not on the same plane.

  Moreover, the curved surface (900) with which the ultrasonic inspection probe of this invention is provided is a concave curved surface.

  Further, the curved surface (200) provided in the ultrasonic flaw detection probe of the present invention is a convex curved surface.

  Of the plurality of ultrasonic transducers (100A, 100B) of the ultrasonic flaw detection probe according to the present invention, the transducer that transmits ultrasonic waves is different from the transducer that transmits ultrasonic waves.

  In addition, the curved surface (1000) provided in the ultrasonic flaw detection probe of the present invention is a kamaboko-shaped curved surface, and the plurality of ultrasonic transducers (400A) are of a linear array system.

  The linear array type ultrasonic transducers (400B) included in the ultrasonic flaw detection probe of the present invention are arranged in a matrix.

  The ultrasonic flaw detection probe of the present invention includes a plurality of ultrasonic transducers (100C) and a member having a curved surface (900) on which the plurality of ultrasonic transducers (100C) are arranged.

  The ultrasonic flaw detection apparatus of the present invention includes an ultrasonic flaw detection probe (300A, 300B, 500, 600, 1100), a control unit (111) that controls the ultrasonic flaw detection probe and acquires data, and a control unit ( 111) and a display unit (110) for displaying the processing result processed by the calculation unit (112).

  Moreover, the ultrasonic flaw detection method of the present invention is an arbitrary combination of a plurality of ultrasonic transducers (100A, 100B, 400A, 400B) arranged on a curved surface (200, 900, 1000) to form a phased array. A step of transmitting an ultrasonic beam from the ultrasonic transducer and a reflected wave that is reflected by a defect in the subject and returned to the ultrasonic wave of a plurality of ultrasonic transducers or any combination Receiving with a vibrator.

  The ultrasonic flaw detection method of the present invention includes a step of transmitting an ultrasonic beam from the ultrasonic transducer (100C) arranged on the curved surface (900), and the transmitted ultrasonic beam is reflected by a defect in the subject. Receiving the reflected wave returned by the ultrasonic transducer (100C).

  According to the present invention, it is possible to provide a flaw detection probe capable of flaw detection with respect to a three-dimensional omnidirectional and focus position of a subject with a single probe.

  In addition, the present invention can perform flaw detection inspection in a very short time.

  The best mode for carrying out an omnidirectional flaw detection probe according to the present invention will be described below with reference to the accompanying drawings.

(First embodiment)
FIG. 4 shows the configuration of the omnidirectional flaw detection probe according to Embodiment 1 of the present invention. The omnidirectional flaw detection probe according to the present embodiment includes a member having a hemispherical concave curved surface 900 and a plurality of transducers 100A forming a phased array. Each vibrator has a vibration surface. A plurality of transducers 100A are three-dimensionally arranged on a hemispherical concave curved surface 900 to form a probe 300A. The angle θ formed by the normal line to the center of the hemispherical concave curved surface 900 and the normal line of an arbitrary part on the hemispherical concave curved surface 900 is set to 0 ° ≦ θ ≦ 90 °. Thus, the angle θ formed between the normal line to the center of the hemispherical concave curved surface 900 and the normal line to the vibration surface of an arbitrary vibrator arranged on the hemispherical concave curved surface 900 is 0 ° ≦ θ ≦ 90. Set to °.

  The probe 300A is attached to the subject 140 via the wedge material 800 so that the normal to the center of the concave curved surface 900 where the plurality of transducers 100A are arranged and the normal to the surface facing the subject 140 are parallel. Be joined. Accordingly, the beam scan direction 18 of the ultrasonic beam 17 transmitted from the transducer of the probe 300A is 360 ° in the circumferential direction of the normal line with respect to the center of the hemispherical concave curved surface 900 with respect to the subject 140. An area between 0 ° and 90 ° is covered as an angle formed between and flaw detection inspection in this region is performed once. This flaw detection inspection is realized by arranging a plurality of transducers 100A forming a phased array on a hemispherical concave curved surface 900.

  The operation principle in the present embodiment is the same as the ultrasonic transmission and reception method of the phased array UT sensor 3 in the background art. That is, in the present embodiment, ultrasonic waves are synthesized by two or more transducers out of the plurality of transducers 100A in one operation, and the ultrasonic beam 17 is transmitted and received. For example, when any three transducers operate, the pulsar / receiver (not shown) provided in the probe of the present embodiment corresponding to any three transducers is first set as the pulsar. The ultrasonic output instruction signals are transmitted to the three transducers, and the ultrasonic beam 17 synthesized by any three transducers is transmitted to the subject 140. At this time, the phase of the ultrasonic wave output from the three vibrators is electrically controlled by a control unit (not shown), and by this control, the ultrasonic beam 17 synthesized by any three vibrators. The beam scanning direction 18 is electrically scanned within a specific range. As a result, in this embodiment, it is possible to detect a wider area of the subject site in one operation. Next, the pulser / receiver corresponding to any of the three transducers is switched to the receiver, and a reception instruction signal is transmitted from the pulser / receiver to the same three transducers that have transmitted ultrasonic waves. The When the ultrasonic beam 17 is reflected by a defect in the subject, the reflected ultrasonic beam 17 is received by the same vibrator that transmitted the ultrasonic wave, and the subject 140 is in the subject 140. It is recognized that there is a defect. When this series of operations is completed, the same operation is sequentially executed in a plurality of transducers of different combinations.

  However, in the present embodiment, a combination of two or more transducers that transmit and receive ultrasonic waves is freely selected three-dimensionally.

  According to the present embodiment, flaw detection inspection is performed on the object 140 in the region of 360 ° in the circumferential direction of the normal line with respect to the center of the hemispherical concave curved surface 900 of the probe 300A and an angle of 0 ° to 90 ° with respect to the normal line. Can be performed at a time. In addition, by using the three-dimensional array of phased array type probes 300A, it is possible to perform an inspection in a short time. Furthermore, since the three-dimensional curved surface on which the plurality of transducers 100A are arranged is a hemispherical concave shape, it is possible to focus the synthesized wave of ultrasonic waves on the subject 140 with a small number of transducers.

(Second Embodiment)
FIG. 5 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 2 of the present invention. The basic configuration and operating principle of the present embodiment are the same as those of the omnidirectional flaw detection probe according to the first embodiment. However, in the first embodiment, the transducer group that outputs the synthesized wave of the ultrasonic wave and the transducer group that receives the ultrasonic wave reflected by the defect 15 in the subject 140 are the phased array UT sensor 3 in the background art. As described in the description of transmission and reception of ultrasonic waves, the same group need not be the same in this embodiment. In other words, the reflected ultrasonic waves can be received by a transducer group different from the transmitting ultrasonic wave. Furthermore, you may receive the ultrasonic wave reflected by all the vibrator | oscillators arrange | positioned on the hemispherical concave curved surface 900. FIG. As a result, the probability that the defect 15 can be detected regardless of the inclination of the subject 140 is improved.

(Third embodiment)
FIG. 6 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 3 of the present invention. The omnidirectional flaw detection probe according to the present embodiment includes a member having a hemispherical convex curved surface 200 and a plurality of transducers 100B forming a phased array. Each vibrator has a vibration surface. A plurality of transducers 100B are three-dimensionally arranged on a hemispherical convex curved surface 200 to form a probe 300B. An angle θ formed by a normal line to the center of the hemispherical convex curved surface 200 and a normal line of an arbitrary portion on the hemispherical convex curved surface 200 is set to 0 ° ≦ θ ≦ 90 °. As a result, the angle θ formed between the normal line to the center of the hemispherical convex curved surface 200 and the normal line to the vibration surface of an arbitrary vibrator arranged on the hemispherical convex curved surface 200 is 0 ° ≦ θ ≦ 90 ° is set.

  The probe 300B includes the subject 140 through the wedge material 800 so that the normal to the center of the convex curved surface 200 where the plurality of transducers 100B are arranged and the normal to the opposite surface of the subject 140 are parallel. To be joined. Thereby, the beam scan direction 18 of the ultrasonic beam 17 transmitted from the transducer of the probe 300B is 360 ° in the circumferential direction of the normal line with respect to the center of the hemispherical convex curved surface 200 with respect to the subject 140. An area of 0 ° to 90 ° as an angle formed with the line is covered, and a flaw detection inspection is performed once in this area. This flaw detection inspection is realized by arranging a plurality of transducers 100B forming a phased array on a hemispherical convex curved surface 200.

  The principle of operation in the present embodiment is the same as that of the ultrasonic transmission and reception method of the phased array UT sensor 3 and the first and second embodiments in the background art, and will not be described. However, in the present embodiment, a combination of two or more transducers that transmit and receive ultrasonic waves can be freely selected three-dimensionally.

  According to the present embodiment, flaw detection is performed on the subject 140 in a region of 360 ° in the circumferential direction of the normal line with respect to the center of the hemispherical convex curved surface 200 of the probe 300B and an angle of 0 ° to 90 ° with respect to the normal line. The inspection can be performed once. In addition, by using the three-dimensional array of phased array type probes 300B, the inspection can be performed in a short time.

(Fourth embodiment)
FIG. 7 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 4 of the present invention. The basic configuration and operation principle of the present embodiment are the same as those of the omnidirectional flaw detection probe according to the third embodiment. However, in the third embodiment, the transducer group that outputs the synthesized wave of the ultrasonic wave and the transducer group that receives the ultrasonic wave reflected by the defect 15 in the subject 140 are the phased array UT sensor 3 in the background art. As described in the description of transmission and reception of ultrasonic waves, the same group need not be the same in the present embodiment, as in the second embodiment. In other words, the reflected ultrasonic waves can be received by a different transducer group. Furthermore, you may receive the ultrasonic wave reflected by all the vibrator | oscillators arrange | positioned on the hemispherical convex curved surface 200. FIG. As a result, the probability that the defect 15 can be detected regardless of the inclination of the subject 140 is improved.

(Fifth embodiment)
FIG. 8 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 5 of the present invention. The omnidirectional flaw detection probe 500 of this embodiment includes a kamaboko-shaped curved surface 1000 and a plurality of linear arrays (vibrators) 400A. Here, the kamaboko-shaped curved surface is a three-dimensional curved surface having a curved surface in one direction. Each linear array 400A includes a vibration surface. A plurality of linear arrays (vibrators) 400 </ b> A are three-dimensionally arranged on the concave portion of the kamaboko-shaped curved surface 1000 to form a probe 500. The angle θ formed by the normal to the center of the kamaboko-shaped curved surface 1000 and the normal of any part on the kamaboko-shaped curved surface 1000 is set to 0 ° ≦ θ ≦ 90 °. As a result, the angle θ formed between the normal to the center of the kamaboko-shaped curved surface 1000 and the normal of the vibration surface of the arbitrary linear array 400A arranged on the concave portion of the kamaboko-shaped curved surface 1000 is 0 ° ≦ θ ≦ 90 °. Set to

  The probe 500 is provided with a wedge member 800 so that the normal to the center of the kamaboko-shaped curved surface 1000 where a plurality of linear arrays (vibrators) 400A are arranged and the normal to the opposite surface of the subject 140 are parallel to each other. And joined to the subject 140. As a result, a flaw detection inspection is performed on the subject 140 in a range of 0 ° to 90 ° as an angle formed with the normal to the center of the kamaboko curved surface 1000 within the range of the longitudinal width of the kamaboko curved surface 1000. It is done once. This flaw detection inspection is realized by three-dimensionally arranging the linear array 400A on the concave portion of the kamaboko curved surface 1000.

  The principle of operation in the present embodiment is the same as in the ultrasonic transmission and reception method of the phased array UT sensor 3 and the first to fourth embodiments in the background art, and is therefore omitted.

  According to the present embodiment, the angle formed by the normal line with respect to the center of the fish-curve-shaped curved surface 1000 within the range of the longitudinal direction of the fish-curved curved surface 1000 of the probe 500 with respect to the subject 140 is 0 ° to 90 °. In this region, the flaw detection inspection can be performed by one scan. In addition, by using the three-dimensional array of phased array type probes 500, the inspection can be performed in a short time. Furthermore, since the three-dimensional curved surface where the plurality of linear arrays (vibrators) 400A are arranged is on the concave portion of the kamaboko-shaped curved surface 1000, the synthesized wave of ultrasonic waves to the subject 140 with a small number of linear arrays (vibrators). Focusing can be performed.

(Sixth embodiment)
FIG. 9 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 6 of the present invention. The basic configuration and operation principle of the present embodiment are the same as those of the omnidirectional flaw detection probe according to the fifth embodiment. However, instead of the linear array (vibrator) 400A provided in the fifth embodiment, a linear array (vibrator) 400B arranged in a matrix is provided. By providing the linear array (vibrator) 400B arranged in a matrix, it becomes possible to scan the synthesized wave beam from each transducer group in the longitudinal direction of the kamaboko curved surface 1000 as well. . As a result, a flaw detection inspection can be performed at a time in a region of 360 ° in the circumferential direction of the normal line with respect to the center of the kamaboko-shaped curved surface 1000 of the probe 600 and an angle of 0 ° to 90 ° with respect to the normal line. Therefore, in the present embodiment, compared with the fifth embodiment, the flaw detection area to be scanned in one inspection is wide, and a reflected wave from a wider range can be detected. As a result, the detection efficiency of the defect 15 for the non-analyte 140 is improved.

(Seventh embodiment)
FIG. 10 shows the configuration of an omnidirectional flaw detection probe according to Embodiment 7 of the present invention. The omnidirectional flaw detection probe 1100 of this embodiment includes a member having a hemispherical concave curved surface 900 and a plurality of transducers 100C that do not form a phased array. The plurality of transducers 100C are discretely arranged on a hemispherical three-dimensional concave curved surface 900 to form a probe 1100. In addition, the angle θ between the normal line to the center of the hemispherical concave curved surface 900 and the normal line to the surface of any transducer discretely arranged on the hemispherical concave curved surface 900 is 0 °, 45 °. 60 °, for example, the angle is set in a predetermined angle direction within a range of 0 ° ≦ θ ≦ 90 °.

  The probe 1100 is attached to the subject 140 via the wedge material 800 so that the normal to the center of the concave curved surface 900 where the plurality of transducers 100C are arranged and the normal to the opposite surface of the subject 140 are parallel. Be joined. Accordingly, 0 to the subject 140, such as 360 ° in the circumferential direction of the normal to the center of the hemispherical concave curved surface 900, 0 °, 45 °, 60 ° as the angle θ formed with the normal. A flaw detection inspection in a predetermined angular direction region within a range of ° ≦ θ ≦ 90 ° is performed for each transducer of the plurality of transducers 100C. This flaw detection inspection is realized by arranging a normal UT sensor 2 on a three-dimensional concave curved surface 900.

  The principle of operation in the present embodiment is the same as that of normal ultrasonic transmission and reception of the UT sensor 2 in the background art, and is therefore omitted.

  According to the present embodiment, the object 140 is 360 ° in the circumferential direction of the normal to the center of the hemispherical concave curved surface 900 of the probe 1100, and an arbitrary angle between 0 ° and 90 ° with respect to the normal. Flaw detection at an angle can be performed. Further, in the present embodiment, the transducer 100 that transmits and receives ultrasonic waves is three-dimensionally arranged only in a predetermined direction, so that it is limited to a region where the subject 140 is desired to be flawed with a small number of transducers. It is very efficient to carry out all inspections. In addition, the test cost can be reduced because the inspection can be performed without requiring the control of the electrical phase that is necessary for the small number of vibrators or the phased array method.

(Eighth embodiment)
FIG. 11 shows the configuration of an ultrasonic flaw detector according to Embodiment 8 of the present invention. The ultrasonic flaw detection apparatus 115 according to the present embodiment includes any one of the omnidirectional flaw detection probes (300A, 300B, 500, 600, 1100) described in the first to seventh embodiments (this probe is a background art). A control unit (111) that controls the omnidirectional flaw detection probe to acquire data, a calculation unit (112) that processes the data acquired by the control unit (111), and a calculation unit (112 And a display unit (110) for displaying the processing result processed by (1). The omnidirectional flaw detection probes (300A, 300B, 500, 600, 1100) are installed on the subject 140 via the wedge material 800 in the same manner as described in the first to seventh embodiments.

  When flaw detection of the subject 140 is started by the ultrasonic flaw detection apparatus 115 of the present embodiment, the control unit 111 issues an ultrasonic transmission instruction to the omnidirectional flaw detection probes (300A, 300B, 500, 600, 1100). Is issued. In response to an ultrasonic transmission instruction from the control unit 111, ultrasonic waves are transmitted from the transducer of the omnidirectional flaw detection probe to the subject 140. If there is a defect in the subject 140, the ultrasonic wave transmitted from the omnidirectional flaw detection probe is reflected by the defect, and the reflected ultrasonic wave is received by the transducer of the omnidirectional flaw detection probe. . In addition to sending and receiving ultrasonic waves to the omnidirectional flaw detection probe, the control unit 111 sequentially specifies combinations of a plurality of transducers when the omnidirectional flaw detection probe is a phased array method. By electrically controlling the phase of the transducer group, the direction of the beam of the synthesized ultrasonic wave is scanned to scan the defect in the subject 140 over a wide range. In addition, when the omnidirectional flaw detection probe is formed by a normal multi-probe, a single transducer is designated and operated from a plurality of transducers, and when the flaw detection by the designated transducer is completed, the next transducer By performing the operation instruction, the operation of the entire vibrator is controlled. Thereby, the test of the subject 140 by the multi-probe is performed.

  Since the operation principle by the omnidirectional flaw detection probe has already been described in the first to seventh embodiments, it is omitted here. In addition, the effect of the ultrasonic flaw detection apparatus according to the present embodiment is equivalent to that described in the omnidirectional flaw detection probes according to the first to seventh embodiments provided at that time.

  By using the ultrasonic flaw detection apparatus according to the present embodiment, it is possible to perform flaw detection over a wide range of the subject 140 in a short time with a single probe.

(A) It is a figure which shows the structure of the conventional UT sensor. (B) It is a figure which shows the structure of the conventional phased array UT sensor. It is a schematic diagram of transmission and reception of ultrasonic waves in a conventional UT sensor. It is a schematic diagram of transmission and reception of ultrasonic waves in a conventional phased array UT sensor. It is a figure which shows the test configuration using the conventional phased array UT sensor. It is a figure which shows the flaw detection image acquired by the test using the conventional phased array UT sensor. 1 is a diagram illustrating a configuration of an omnidirectional flaw detection probe according to Embodiment 1. FIG. It is a figure which shows the structure of the omnidirectional flaw detection probe concerning Embodiment 2. FIG. FIG. 6 is a diagram showing a configuration of an omnidirectional flaw detection probe according to Embodiment 3. It is a figure which shows the structure of the omnidirectional flaw detection probe concerning Embodiment 4. FIG. FIG. 10 is a diagram showing a configuration of an omnidirectional flaw detection probe according to a fifth embodiment. FIG. 10 is a diagram illustrating a configuration of an omnidirectional flaw detection probe according to a sixth embodiment. FIG. 10 is a diagram showing a configuration of an omnidirectional flaw detection probe according to a seventh embodiment. FIG. 10 is a diagram showing a configuration of an ultrasonic flaw detector according to Embodiment 8.

Explanation of symbols

1, 1a, 1b, 1c, 7, 12, 700 ... vibrator 2 ... normal UT sensor 3 ... phased array UT sensor 4, 9 ... flaw detector 5, 10 ... pulser / receiver 8 ... ultrasonic composite wave 11 ... multi Probe 13 ... 1 probe ultrasonic wave 14 ... test piece 15 ... defect 16 ... flaw detection image 17 ... ultrasonic beam 18 ... beam scanning direction 19 ... ultrasonic beam reflected waves 100A, 100B, 100C ... transducer 110 ... display unit 111 ... Control unit 112 ... arithmetic unit 115 ... ultrasonic flaw detector 140 ... subject 200 ... convex curved surface 400 ... linear array (vibrator)
6, 300A, 300B, 500, 600, 1100 ... probe 800 ... wedge material 900 ... concave curved surface 1000 ... kamaboko-shaped curved surface

Claims (12)

A plurality of ultrasonic transducers forming a phased array;
An ultrasonic flaw detection probe comprising: a member having a curved surface on which the plurality of ultrasonic transducers are disposed. The ultrasonic flaw detection probe according to claim 1,
The ultrasonic transducer has a vibration surface;
An ultrasonic flaw detection probe in which normal lines of the vibration surfaces of any three ultrasonic transducers among the plurality of ultrasonic transducers are not on the same plane. The ultrasonic flaw detection probe according to claim 1 or 2,
The ultrasonic flaw detection probe, wherein the curved surface is a concave curved surface. The ultrasonic flaw detection probe according to claim 1 or 2,
The ultrasonic flaw detection probe, wherein the curved surface is a convex curved surface. The ultrasonic flaw detection probe according to claim 3 or 4,
An ultrasonic flaw detection probe in which a transducer that transmits ultrasonic waves and a transducer that receives ultrasonic waves are different from each other among the plurality of ultrasonic transducers. The ultrasonic flaw detection probe according to claim 1,
An ultrasonic flaw detection probe in which the curved surface is a kamaboko-shaped curved surface, and the plurality of ultrasonic transducers are of a linear array type. The ultrasonic flaw detection probe according to claim 6,
The plurality of ultrasonic transducers are ultrasonic flaw detection probes arranged in a matrix. A plurality of ultrasonic transducers;
An ultrasonic flaw detection probe comprising: a member having a curved surface on which the plurality of ultrasonic transducers are arranged. The ultrasonic flaw detection probe according to claim 8,
The ultrasonic flaw detection probe, wherein the curved surface is a concave curved surface. The ultrasonic flaw detection probe according to any one of claims 1 to 8,
A control unit that acquires data by controlling the ultrasonic flaw detection probe; and
An arithmetic unit that processes data acquired by the control unit;
An ultrasonic flaw detector comprising: a display unit that displays a processing result processed by the arithmetic unit. A step of transmitting an ultrasonic beam from any combination of ultrasonic transducers arranged on a curved surface to form a phased array; and
Receiving the reflected wave, which is reflected by the transmitted ultrasonic beam reflected by a defect in the subject, by the plurality of ultrasonic transducers or the arbitrary combination of ultrasonic transducers. Sonic flaw detection method. Transmitting an ultrasonic beam from an ultrasonic transducer disposed on a curved surface;
An ultrasonic flaw detection method comprising: a step of receiving, by the ultrasonic transducer, a reflected wave in which the transmitted ultrasonic beam is reflected and returned by a defect in a subject.

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