JP2005300363A - Ultrasonic flaw detecting system and ultrasonic flaw detecting test method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detecting system capable of freely determining the absolute position of a probe to a flaw detecting surface, especially obtaining a good flaw detection result with respect to the flaw detecting surface having a crack therein in a complicated shape, and an ultrasonic flaw detecting test method using the system. <P>SOLUTION: The ultrasonic flaw detecting system is used at the time of ultrasonic flaw detection and includes a scanner 2 for locating the probe by three-dimensional operation with respect to the flaw detecting surface 1; a distance sensor 4 for measuring the distance between the a probe 3 and the flaw detecting surface; a CAD device 14 for displaying the position of the probe and the incident direction and locus of ultrasonic waves on the basis of the data related to the shape or the like of the flaw detection surface and a flaw detector 6 for outputting a flaw detection result. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultrasonic flaw detection test system and an ultrasonic flaw detection method that are performed for sizing defects in various welded structures such as pipes.

  Conventionally, when sizing a defect such as a weld defect, it has been carried out by analyzing and evaluating only an ultrasonic flaw detection test result by an inspector.

  However, in the ultrasonic flaw detection test on welded structures, the probe and flaw detection must be performed when performing a flaw detection test on a flaw detection surface having a complicated shape such as a large unevenness. It is difficult to face the surface, and the reproducibility is poor, which greatly affects the accuracy of the ultrasonic flaw detection test.

Therefore, conventionally, when the subject surface has a phase shape, a three-axis drive mechanism having an X, Y, and Z axis scanner is provided in order to obtain a good flaw detection image except for the harm of reflection of ultrasonic waves on the surface. An ultrasonic flaw detector has been proposed (see Patent Document 1).
JP-A-7-128311

  In the conventional technology described above, the ultrasonic flaw detection test on a welded structure can be applied to a flaw detection surface that has a complicated shape such as large irregularities, but the crack existing on the flaw detection surface has a complicated shape inside. When performing an ultrasonic flaw detection test on a flaw detection surface, it may be very difficult to align the probe and the flaw detection surface, and the reproducibility is poor. It had a big influence.

  The present invention has been made in view of such circumstances, and the absolute position of the probe with respect to the flaw detection surface can be freely determined. In particular, the crack present on the flaw detection surface has a complicated shape inside. An object of the present invention is to provide an ultrasonic flaw detection system capable of obtaining a good flaw detection result on a flaw detection surface and an ultrasonic flaw detection test method using the same.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided an ultrasonic flaw detection system for use in performing ultrasonic flaw detection, comprising: a scanner for positioning a probe by a three-dimensional operation with respect to a flaw detection surface; , A distance sensor that measures the distance between the probe and the flaw detection surface, and a CAD device that displays the position of the probe, the incident direction and the trajectory of the ultrasonic wave based on information on the shape of the flaw detection surface, etc. And an ultrasonic flaw detection system comprising a flaw detector for outputting flaw detection results.

  The invention according to claim 2 provides an ultrasonic flaw detection system in which the scanner can freely position the probe in a direct direction or a rotational direction.

  In the invention according to claim 3, the distance sensor provides an ultrasonic flaw detection system capable of measuring a distance between a probe and a flaw detection surface that are separated from each other.

  According to a fourth aspect of the present invention, the CAD device includes information on a flaw detection surface shape and an incident direction of ultrasonic waves based on a result obtained by the probe, design dimension information of a flaw detection unit, and the probe. It is possible to input the position of the flaw detection part with respect to the flaw detection part, and it is possible to monitor the flaw shape, depth and ultrasonic trajectory of the flaw detection part during the flaw detection. I will provide a.

  In the invention according to claim 5, as means for finding the optimum flaw detection condition, the probe is rotated in the direction of the rotation axis, and the maximum value of the echo obtained from the end of the crack and the maximum depth of the crack are searched. An ultrasonic flaw detection system having means is provided.

  In the invention according to claim 6, the ultrasonic flaw detection system according to any one of claims 1 to 5 is used, and the ultrasonic flaw detection system according to any one of claims 1 to 5 is used. Positioning the probe with respect to the flaw detection surface, measuring the distance between the probe and the flaw detection surface, information on the shape of the flaw detection surface, the position of the probe, and the incident direction of the ultrasonic wave And an ultrasonic flaw detection method characterized by displaying a trajectory and outputting a flaw detection result.

  According to the present invention, the probe is mounted on a scanner capable of adjusting the orientation and angle of the probe with respect to the flaw detection surface, the distance between the probe and the flaw detection surface is measured, and the result is used for controlling the scanner. It is possible to provide feedback. Also, when performing an ultrasonic flaw detection test, even if the flaw detection surface has irregularities, cracks, etc., it is possible to control the probe to the optimum flaw detection position with respect to the flaw detection surface by controlling the scanner. It is. Then, the information can be taken into the CAD device and comprehensively analyzed to determine the optimum probe position, and the probe can be moved to the optimum position by the scanner. Therefore, good ultrasonic flaw detection test results can be obtained even for flaw detection surfaces with complicated shapes that have been difficult in ultrasonic flaw detection tests on welded structures, or flaw detection surfaces with complicated shapes inside. Can be obtained.

  Hereinafter, embodiments of an ultrasonic flaw detection system and an ultrasonic flaw detection test method according to the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram showing an outline of the ultrasonic flaw detection system according to the present embodiment.

  As shown in FIG. 1, the ultrasonic flaw detection system includes a scanner 2 corresponding to the flaw detection surface 1, and a probe 3 and a distance sensor 4 are provided on the scanner 2.

  The scanner 2 has a mechanism capable of holding the distance sensor 2 and the probe 3. This distance sensor 2 measures the distance between the flaw detection surface 1 and the probe 3, and based on the result, moves the scanner 2 to optimize the positional relationship between the probe 3 and the flaw detection surface 1. Is possible.

  In the present embodiment, a scanner control panel 5 for controlling the operation of the scanner 2, a flaw detector 6 for displaying flaw detection results, and a distance sensor amplifier 7 for knowing the measurement results of the distance sensor 2 are provided.

  2A and 2B show an example of the rotation axis direction in the scanner 2 described above. These drawings show the probe 3 and the distance sensor 4 attached to the scanner 2 as a side view of the scanner 2.

  As shown in FIG. 2 (A), in the system of the present embodiment, for example, three orthogonal shafts 8, 9, 10 and three rotating shafts 11, 12, which rotate around these axes 8, 9, 10 are used. The mechanism has a total of 13 six axes.

  Depending on the flaw detection conditions such as the flaw detection surface shape on the flaw detection surface 1, the properties of the expected crack, the material of the flaw detection object, the contact medium, etc., the flaw detection surface 1 and the probe may be detected by a scanner having a different number of axes other than six. The distance to the child 3 can be corrected to an optimum positional relationship in the ultrasonic flaw detection test.

  FIG. 3 shows an arrangement example of the distance sensor 4 described above. FIG. 3 shows a state in which the distance sensor 4 attached to the scanner 2 shown in FIG. 2 is viewed from the flaw detection surface 1 side (lower side) together with the probe 3.

  As shown in FIG. 3, three distance sensors 4 are provided and are arranged along outer surface portions on both sides of the probe 3. That is, two distance sensors 4 are disposed on the outer surface of one side of the probe 3 and one is disposed on the outer surface of the other side.

  The number of the distance sensors 4 to be attached can be appropriately changed depending on the flaw detection surface shape, the expected crack property, the material of the flaw detection object, the flaw detection conditions such as the contact medium, and the like.

  As the distance sensor 4, it is desirable to apply an ultrasonic distance sensor or a laser distance sensor.

  FIG. 4 is a diagram showing a detailed system configuration in the present embodiment.

  As shown in FIG. 4, in this embodiment, a CAD (Computer Aided Design) device 14 is incorporated together with a scanner control panel 5, a flaw detector 6, and a distance sensor (amplifier) 7. .

  That is, the result of distance measurement between the probe and the flaw detection surface measured by the distance sensor 4 and the flaw detection result from the flaw detector 6, that is, the A scope and the B scope are input to the CAD device 14 to which design information of the flaw detection surface has been input in advance. The ultrasonic incident direction, the ultrasonic trajectory, and the surface shape of the flaw detection surface are clarified, and this information is taken into the CAD device 14 and comprehensively analyzed to determine the optimal probe position. A system for moving the probe to an optimum position by the scanner 2 is configured.

  Note that it is considered that the probe 3 is a phased array probe, so that it is easier to understand the incident direction of ultrasonic waves, the trajectory of ultrasonic waves, and the surface shape of the flaw detection surface.

  If the flaw detection surface 1 is not smooth or has a complicated shape such as a crack present on the flaw detection surface rotating inside, the probe is rotated in the direction of the rotation axis of the scanner 2. However, it is considered that a system that performs flaw detection while searching for a probe position where a crack end echo can be detected from the deepest point is effective by performing flaw detection. At this time, the number of rotation axes to be rotated can be variously set according to the flaw detection conditions such as the shape of the flaw detection surface, the expected crack properties, the material of the flaw detection target, and the contact medium.

  According to the above embodiment, the probe 3 is mounted on the scanner 2 capable of adjusting the direction and angle with respect to the flaw detection surface 1, the distance between the probe 3 and the flaw detection surface 1 is measured, and the result is obtained by the scanner. It is possible to feed back to the second control. Further, when performing an ultrasonic flaw detection test, even when the flaw detection surface has irregularities, cracks, or the like, the probe 3 is controlled to the optimal position for flaw detection with respect to the flaw detection surface 1 by controlling the scanner 2. It is possible.

  Then, these pieces of information are taken into the CAD device 14 and comprehensively analyzed to determine the optimum probe position, and the probe 2 can be moved to the optimum position by the scanner 2. Therefore, good ultrasonic flaw detection test results can be obtained even for flaw detection surfaces with complicated shapes that have been difficult in ultrasonic flaw detection tests on welded structures, or flaw detection surfaces with complicated shapes inside. Can be obtained.

  In addition, by carrying out an ultrasonic flaw detection test using all or a part of the flaw detection systems described above, in particular, it is possible to carry out an ultrasonic flaw detection test on a flaw detection surface having a complicated shape. Is possible. In this case, the number of orthogonal axes and rotation axes of the scanner 2, the number and installation positions of the distance sensors, and whether or not the CAD system is incorporated, the shape of the flaw detection surface, the expected crack properties, the material of the flaw detection object, the contact medium Various settings can be made depending on the flaw detection conditions.

1 is a schematic diagram showing an ultrasonic flaw detection system according to an embodiment of the present invention. (A), (B) is a figure which shows an example of the rotating shaft direction in a scanner. The figure which shows the example of arrangement | positioning of the distance sensor in embodiment of this invention. 1 is a detailed configuration diagram showing an ultrasonic flaw detection system according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flaw detection surface 2 Scanner 3 Probe 4 Distance sensor 5 Scanner control board 6 Flaw detector 7 Distance sensor amplifier 8 Scanner rotation direction 9 Scanner rotation direction 10 Scanner rotation direction 11 Scanner linear motion direction 12 Scanner linear motion direction 13 Scanner linear motion direction 14 CAD equipment

Claims (6)

An ultrasonic flaw detection system used for performing ultrasonic flaw detection, a scanner for positioning a probe by a three-dimensional operation with respect to a flaw detection surface, and a distance for measuring a distance between the probe and the flaw detection surface A sensor, a CAD device that displays the position of the probe, the incident direction of ultrasonic waves, and a locus based on information on the shape of the flaw detection surface, and a flaw detector that outputs flaw detection results. Ultrasonic flaw detection system. The ultrasonic flaw detection system according to claim 1, wherein the scanner can freely position the probe in a perpendicular direction or a rotational direction. The ultrasonic flaw detection system according to claim 1, wherein the distance sensor is capable of measuring a distance between a probe and a flaw detection surface that are separated from each other. The CAD device inputs information on the shape of the flaw detection surface and the incident direction of ultrasonic waves based on the result obtained by the probe, design dimension information of the flaw detection portion, and a position of the probe with respect to the flaw detection portion. The ultrasonic flaw detection system according to claim 1, wherein the flaw shape, depth, and ultrasonic trajectory of the flaw detection portion can be monitored during ultrasonic flaw detection during ultrasonic flaw detection. The means for finding an optimum flaw detection condition includes means for searching the maximum value of the echo and the maximum depth of the crack obtained by rotating the probe in the direction of the rotation axis. Ultrasonic flaw detection system. Using the ultrasonic flaw detection system according to any one of claims 1 to 5, a probe is positioned with respect to a flaw detection surface, a distance between the probe and the flaw detection surface is measured, An ultrasonic flaw detection method characterized by displaying information on the shape of a flaw detection surface, the position of the probe, the incident direction and trajectory of ultrasonic waves, and outputting a flaw detection result.

Images