Ultrasonic flaw detection data processing program, and ultrasonic flaw detection data processing method

Abstract

To improve accuracy of determination related to the condition of a subject based on a result of ultrasonic flaw detection, regardless of a level of the skill of an examiner.SOLUTION: In an ultrasonic flaw detection data processing program, flaw detection data includes: first flaw detection data acquired at a first position at a first distance in one of directions crossing the extending direction of a weld part stored in an external device; and second flaw detection data acquired at a second position at a second distance different from the first distance in one direction. At a display command generation step, a command for having a display device display to one display screen a first flaw detection image showing signal strength of the first flaw detection data read from the external device at a first reading step and a second flaw detection image showing signal strength of the second flaw detection data read from the external device at a second reading step.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an ultrasonic inspection data processing program, an ultrasonic inspection data processing method, and an ultrasonic inspection device. [Background technology]

[0002] It is common to perform ultrasonic flaw detection on a test object to inspect the inside of the test object. In ultrasonic flaw detection, for example, a flaw detection image is generated based on the reflected wave of ultrasonic waves transmitted to the test object, and the presence or absence of flaws inside the test object and the position of the flaws can be determined from the generated flaw detection image (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-141124 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, when inspecting a welded portion that extends in a certain direction, such as a butt welded portion, ultrasonic flaw detectors capable of transmitting and receiving ultrasonic waves may be placed on one side and the other side of the welded portion, and ultrasonic flaw detection may be performed using each ultrasonic flaw detector. However, when ultrasonic flaw detection is performed in a narrow portion, ultrasonic flaw detectors may only be placed on one side or the other side of the welded portion. In this case, the range that can be detected is narrower than when ultrasonic flaw detection is performed by placing ultrasonic flaw detectors capable of transmitting and receiving ultrasonic waves on one side and the other side of the welded portion. In such cases, the range that can be detected can be changed by changing the distance between the weld and the ultrasonic flaw detector, so the desired range can be detected by performing ultrasonic testing multiple times with different distances between the weld and the ultrasonic flaw detector.

[0005] However, it is relatively difficult to determine the presence or absence of flaws in a test object and their locations based on the results of ultrasonic flaw detection performed multiple times. Therefore, there is a need to be able to accurately determine the presence or absence of flaws in a test object and their locations, regardless of the skill level of the inspector.

[0006] In view of the above circumstances, at least one embodiment of the present disclosure aims to contribute to improving the accuracy of judgments about the state of a test object based on the results of ultrasonic flaw detection, regardless of the skill level of an inspector. [Means for solving the problem]

[0007] (1) An ultrasonic inspection data processing program according to at least one embodiment of the present disclosure, An ultrasonic inspection data processing program for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a weld of a test object, A flaw detection data reading step of reading flaw detection data stored in an external device; a display command generating step of generating a command for displaying, on a display device, a flaw detection image showing a signal intensity at each position inside the subject based on the flaw detection data read in the flaw detection data reading step; and causing a computing device to execute the following: The inspection data includes first inspection data acquired at a first position a first distance away in one direction intersecting with an extension direction of the welded portion, and second inspection data acquired at a second position a second distance away in the one direction that is different from the first distance, The flaw detection data reading step includes: A first reading step of reading the first flaw detection data; A second reading step of reading the second flaw detection data; Including, In the display command generation step, a command is generated to display on a single display screen of the display device a first flaw detection image indicating the signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image indicating the signal intensity of the second flaw detection data read in the second reading step.

[0008] (2) An ultrasonic inspection data processing method according to at least one embodiment of the present disclosure, 1. An ultrasonic inspection data processing method for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a weld of a test object, comprising: A flaw detection data reading step of reading flaw detection data stored in an external device; a display command generating step of generating a command for displaying, on a display device, a flaw detection image showing a signal intensity at each position inside the subject based on the flaw detection data read in the flaw detection data reading step; Equipped with The inspection data includes first inspection data acquired at a first position a first distance away in one direction intersecting with an extension direction of the welded portion, and second inspection data acquired at a second position a second distance away in the one direction that is different from the first distance, The flaw detection data reading step includes: A first reading step of reading the first flaw detection data; A second reading step of reading the second flaw detection data; Including, In the display command generation step, a command is generated to display on a single display screen of the display device a first flaw detection image indicating the signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image indicating the signal intensity of the second flaw detection data read in the second reading step.

[0009] (3) An ultrasonic flaw detection apparatus according to at least one embodiment of the present disclosure, An ultrasonic inspection apparatus for ultrasonically inspecting an object having a butt weld that connects two members, comprising: a first flaw detector positionable on a surface of one of the two members at a first distance from the butt weld; a second flaw detector that can be positioned on a surface of one of the two members at a second distance from the butt weld, the second distance being different from the first distance; a holding unit that holds the first flaw detector and the second flaw detector while maintaining a relative positional relationship between them; a moving device configured to be able to move the first flaw detector and the second flaw detector held by the holding portion in an extension direction of the butt weld portion; an acquisition device for acquiring information regarding a moving distance in the extension direction; Equipped with. Effect of the Invention

[0010] At least one embodiment of the present disclosure contributes to improving the accuracy of judgment on the state of a test object based on the results of ultrasonic flaw detection, regardless of the skill level of an inspector. [Brief description of the drawings]

[0011] [Figure 1] 1 is an overall configuration diagram of an ultrasonic inspection data processing device according to an embodiment; [Diagram 2] 1 is a flowchart showing an outline of a procedure for evaluating a specimen according to one embodiment. [Diagram 3] FIG. 2 is a diagram showing a schematic diagram of an ultrasonic inspection performed in a flaw detection step. [Figure 4] 10 is a flowchart showing a flow of processing performed in a setting step. [Diagram 5] 13 is a judgment condition setting screen for setting a first judgment condition. [Figure 6] 13 is a judgment condition setting screen for setting a second judgment condition. [Figure 7] FIG. 13 is a diagram showing a groove shape setting screen. [Figure 8] FIG. 13 is a diagram showing an evaluation target range input screen. [Figure 9] 13 is a flowchart showing a flow of processing performed in a display step. [Figure 10] FIG. 13 is a diagram showing a judgment result display screen. [Figure 11] FIG. 13 is a diagram showing a judgment result display screen. [Figure 12] 13 is a flowchart showing a process in a determination condition switching step. [Figure 13] 4 is a display image of a three-dimensional inspection image displayed on a display device. [Figure 14] 13 is a diagram showing a schematic diagram of an ultrasonic inspection performed in a flaw detection step to acquire flaw detection data of a flaw detection data group according to another embodiment. FIG. [Figure 15] FIG. 13 is a diagram showing a determination result display screen according to another embodiment. [Figure 16] 13 is a schematic diagram of a portion of an ultrasonic flaw detection device according to another embodiment that is attached to a pipe being inspected, as viewed from the radial outside of the pipe. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such a configuration, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0013] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such a configuration, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise," "include," "have," "includes," or "have" of one element are not exclusive expressions excluding the presence of other elements.

[0014] 1 is a diagram showing the overall configuration of an ultrasonic inspection data processing device according to an embodiment. The ultrasonic inspection data processing device 1 is an ultrasonic inspection data processing device for processing inspection data obtained by performing ultrasonic inspection on a test object. In other words, the ultrasonic inspection data processing device 1 is an ultrasonic inspection data processing device for acquiring and processing inspection data previously obtained by performing ultrasonic inspection, and is configured, for example, by a computer or the like. The ultrasonic inspection data processing device 1 includes a CPU 2, which is a calculation device, and a storage device 3 that reads and stores inspection data from an external device. The above-mentioned external device is any of various devices other than the ultrasonic inspection data processing device 1 according to one embodiment, such as a portable device such as an ultrasonic inspection device 10 shown in Fig. 3 described later, a storage device installed in a business establishment such as a factory, a storage device on a network, etc.

[0015] The CPU 2 virtually includes at least the functional blocks of an evaluation target range setting unit 21 and a display command generating unit 22 . The evaluation target range setting unit 21 sets an evaluation target range inside the subject, as described later. Moreover, the display command generating unit 22 extracts evaluation target data corresponding to a region inside the evaluation target range from the flaw detection data, as described later, and generates a command for displaying a flaw detection image indicating the signal intensity (echo height) of the evaluation target data at each position inside the subject on the display device 5. The display command generated by the display command generating unit 22 is output to the external display device 5. The display device 5 displays an image based on the display command generated by the display command generating unit 22.

[0016] As a result, the ultrasonic inspection data processing device 1 of the embodiment can determine the position of a flaw in the test object based on the flaw inspection image corresponding to the area within the evaluation target range. Therefore, by appropriately setting the evaluation target range according to the shape of the test object, it is possible to suppress the appearance of shape echoes in the flaw inspection image. This can improve the accuracy of distinguishing flaw echoes from shape echoes regardless of the skill level of the inspector.

[0017] 2 is a flowchart showing an outline of a procedure of an evaluation method for a specimen according to an embodiment of the present invention. The evaluation method for a specimen according to an embodiment of the present invention includes a flaw detection step S1, a setting step S3, a display step S5, and an evaluation step S7.

[0018] The flaw detection step S1 is a step of performing ultrasonic flaw detection on a test object using an ultrasonic flaw detection device to obtain flaw detection data. 3 is a diagram showing a schematic view of an ultrasonic inspection performed in the inspection step S1. In the inspection method according to one embodiment, the inspection object is, for example, a pipe 7 used in a boiler or the like. In the following description, the presence or absence of a flaw occurring in the vicinity of a welded portion 8 in the circumferential direction of the inspection object pipe is inspected. The ultrasonic inspection device 10 used in the ultrasonic inspection performed in the inspection step S1 is an apparatus that performs ultrasonic inspection by, for example, a phased array method or a TOFD method. In the following description, an example of ultrasonic inspection by the phased array method will be described, but ultrasonic inspection by the TOFD method may also be performed.

[0019] In the ultrasonic inspection performed in the flaw detection step S1, for example, the flaw detectors 11 are arranged at two positions spaced apart in the axial direction of the pipe 7 across the welded portion 8. Then, ultrasonic flaw detection is performed while moving the two flaw detectors 11 in the circumferential direction of the pipe 7. For ease of explanation, the left side in FIG. 3 with respect to the axial direction of the pipe 7 is referred to as the boiler front side, and the right side in the figure is referred to as the boiler rear side. In one embodiment, in FIG. 3, the ultrasonic flaw detector 10 scans with ultrasonic waves so that the scanning plane of electronic scanning called sector scanning is along a plane extending along the axial direction of the pipe 7 and the wall thickness direction of the pipe.

[0020] 3, the one flaw detector 11 and the other flaw detector 11 arranged at a distance in the axial direction of the pipe 7 across the welded portion 8 are preferably connected to each other so that the relative positions of the one flaw detector 11 and the other flaw detector 11 do not change. The one flaw detector 11 and the other flaw detector 11 are preferably configured to be movable in the circumferential direction around the outer periphery of the pipe 7 so that their circumferential positions on the pipe 7 are the same. Specifically, one flaw detector 11 and the other flaw detector 11 are attached to a moving device 56 for the flaw detector 11. The moving device 56 is configured to be able to move the flaw detector 11 in the circumferential direction of the pipe 7 manually or by a driving force such as a motor. The moving device 56 shown in FIG. 3 is configured to be able to move the flaw detector 11 so that the relative positions of the two flaw detectors 11 in the circumferential direction do not shift and the separation distance in the direction of the axis AXc of the pipe 7 does not change. For example, as shown in FIG. 3, the moving device 56 may be integrated by connecting a member that holds one flaw detector 11 and a member that holds the other flaw detector 11. The moving device 56 shown in Figure 3 is configured so that once the flaw detector 11 is attached to the pipe 7, the flaw detector 11 can be moved in the circumferential direction of the pipe 7, but the flaw detector 11 cannot be moved in the direction of the axis AXc. The moving distances of the one flaw detector 11 and the other flaw detector 11 in the circumferential direction can be measured by the encoder 13.

[0021] The inspection data obtained by the ultrasonic inspection is stored in a storage device (not shown) of the ultrasonic inspection device 10 together with information on the moving distance in the circumferential direction from a reference position in the circumferential direction measured by the encoder 13 . 3, four pieces of flaw detection data are obtained for each circumferential weld 8 of the piping 7: flaw detection data by the direct method using the flaw detector 11 at the front of the boiler, flaw detection data by the single reflection method using the flaw detector 11 at the front of the boiler, flaw detection data by the direct method using the flaw detector 11 at the rear of the boiler, and flaw detection data by the single reflection method using the flaw detector 11 at the rear of the boiler. In the following description, a set of these four pieces of flaw detection data may be referred to as a flaw detection data group. The flaw detection data by the direct method refers to data of the echo of ultrasonic waves emitted directly from the flaw detector 11. The flaw detection data by the single reflection method refers to data of the echo of ultrasonic waves emitted from the flaw detector 11 and reflected once inside the test object. In the ultrasonic inspection device 10 of one embodiment, the four sets of inspection data are obtained as many times as the number of inspection points.

[0022] The setting step S3 is a step for making preparations for carrying out the display step S5 described later, such as setting an evaluation target range inside the subject. The flaw detection data acquired in the flaw detection step S1 includes data on reflected waves (flaw echoes) caused by flaws in the test object, as well as data on reflected waves (shape echoes) caused by the shape of the test object. Therefore, in the flaw detection image obtained based on the flaw detection data, shape echoes appear in addition to flaw echoes. In order to determine the presence or absence of flaws in the test object and the position of the flaws by ultrasonic flaw detection, it is necessary to distinguish between flaw echoes and shape echoes. However, since it can be difficult to distinguish between flaw echoes and shape echoes, there is a risk that the discrimination results will differ depending on the skill level of the inspector. Therefore, in the evaluation method for a test object according to one embodiment, an evaluation target range, which will be described later, inside the test object is set in a setting step S3, thereby suppressing the appearance of shape echoes outside the evaluation target range in the flaw detection image displayed on the display device 5 in a display step S5, which will be described later. Details of the process in the setting step S3 will be described later.

[0023] The display step S5 is a step of extracting evaluation target data corresponding to the region within the evaluation target range set in the setting step S3 from the flaw detection data, and displaying a flaw detection image showing the signal intensity of the evaluation target data at each position inside the subject on the display device 5. The details of the process in the display step S5 will be described later.

[0024] The evaluation step S7 is a step of evaluating the presence or absence of flaws in the evaluation target range based on the flaw detection image displayed on the display device 5. In the evaluation step S7, the inspector checks the presence or absence of flaws in the evaluation target range based on the flaw detection image displayed on the display device 5. The details of the evaluation step S7 will be described later.

[0025] (Regarding setting step S3) The setting step S3 will now be described in detail. FIG. 4 is a flow chart showing the flow of the process performed in the setting step S3. In the setting step S3, a flaw detection data reading step S31, a judgment condition setting step S33, a groove shape setting step S35, an evaluation target range input step S37, and an evaluation target range setting step S39, which will be described below, are performed.

[0026] The program executed by the CPU 2 in the setting step S3 is an ultrasonic inspection data processing program for processing inspection data obtained by performing ultrasonic inspection on the test object. For convenience of explanation, the following description will be given assuming that the steps from the flaw detection data reading step S31 to the evaluation target range setting step S39 are executed in sequence. However, the execution order of the steps from the flaw detection data reading step S31 to the groove shape setting step S35 is not limited to the order described below, and they may be executed from any step. Note that the evaluation target range input step S37 is executed after the steps from the flaw detection data reading step S31 to the groove shape setting step S35 are executed. Also, the evaluation target range setting step S39 is executed after the evaluation target range input step S37 is executed.

[0027] (Flaw detection data reading step S31) The flaw detection data reading step S31 is a step of reading the flaw detection data obtained by ultrasonic flaw detection. When the CPU 2 is instructed to read the flaw detection data obtained by ultrasonic flaw detection, the CPU 2 reads the flaw detection data and stores it in the storage device 3. In the flaw detection data reading step S31, for example, the flaw detection data may be read by connecting the ultrasonic flaw detection data processing device 1 and the above-mentioned external device such as the ultrasonic flaw detection device 10 by wire or wirelessly, the flaw detection data may be read via a recording medium such as a memory card, or the flaw detection data may be read via a communication network or the like.

[0028] (Determination condition setting step S33) The judgment condition setting step S33 is a step for setting judgment conditions and the like when making a pass / fail judgment on the result of the flaw detection inspection in the flaw detection data read in the flaw detection data reading step S31. When an instruction to set judgment conditions is given, the CPU 2 causes the display device 5 to display, for example, a judgment condition setting screen 100 as shown in Figs. 5 and 6. The judgment condition setting screen 100 is a setting screen for setting a display color according to the echo height when displaying the flaw detection image and a threshold value for pass / fail judgment of the result of the flaw detection inspection. Details of the flaw detection image according to one embodiment will be described later.

[0029] In one embodiment, two judgment conditions, a first condition and a second condition, can be set for the threshold for pass / fail judgment of the result of the flaw detection inspection. Fig. 5 shows a judgment condition setting screen 100 for setting the first judgment condition, and Fig. 6 shows a judgment condition setting screen 100 for setting the second judgment condition.

[0030] In one embodiment, for example, the second judgment condition is set to a stricter condition than the first judgment condition so that even a flaw that is less severe than the first judgment condition is judged to be unacceptable.

[0031] The first judgment condition switching button 101 is a functional button for switching from the judgment condition setting screen 100 for setting the second judgment condition shown in FIG. 6 to the judgment condition setting screen 100 for setting the first judgment condition shown in FIG. 5. The second judgment condition switching button 102 is a functional button for switching from the judgment condition setting screen 100 for setting the first judgment condition shown in FIG. 5 to the judgment condition setting screen 100 for setting the second judgment condition shown in FIG. 6.

[0032] The echo height setting area 110 is a display area for setting the relationship between the display color and the echo height in the flaw detection image, and includes color setting sections 111a to 111e and echo height setting sections 112a to 112d. In the color setting units 111a to 111e, the display color in the flaw detection image can be set according to the echo height set in the echo height setting units 112a to 112d. When one of the color setting units 111a to 111e is selected, a color selection dialogue (not shown) is displayed, and an arbitrary color can be selected from the dialogue. When a color is specified from the dialogue, the specified color is set as the setting color of the selected color setting unit 111a to 111e. In the echo height setting sections 112a to 112d, the relationship between the color set in the color setting sections 111a to 111e and the echo height can be set. When any one of the echo height setting sections 112a to 112d is selected, the echo height can be input. The echo height that can be input in the echo height setting sections 112a to 112d ranges from 0% to 100%.

[0033] In a flaw detection image, which will be described later, a region having an echo height less than the echo height set by the echo height setting unit 112a is displayed in the color set by the color setting unit 111a. Similarly, in the flaw detection image, areas that are equal to or greater than the echo height set in the echo height setting unit 112a and less than the echo height set in the echo height setting unit 112b are displayed in the color set in the color setting unit 111b. In the flaw detection image described later, areas that are equal to or greater than the echo height set in the echo height setting unit 112b and less than the echo height set in the echo height setting unit 112c are displayed in the color set in the color setting unit 111c. In the flaw detection image described later, areas that are equal to or greater than the echo height set in echo height setting unit 112c and less than the echo height set in echo height setting unit 112d are displayed in the color set in color setting unit 111d. In a flaw detection image, which will be described later, a region having an echo height equal to or greater than the echo height set in the echo height setting section 112d is displayed in the color set in the color setting section 111e. In addition, the display color in the flaw detection image may be changed discretely according to the echo height as described above, or the display color may be interpolated according to the echo height, and the display color in the flaw detection image may be changed continuously according to the echo height.

[0034] The detection level setting buttons 113a to 113d are radio buttons for setting one of the echo heights set in the echo height setting units 112a to 112d as the flaw detection level. The flaw detection level is one of the judgment conditions (thresholds) for judging a flaw as unacceptable, as described later. For example, when the detection level setting button 113a is selected, the echo height set in the echo height setting section 112a is set as the flaw detection level. Similarly, when the detection level setting button 113b is selected, the echo height set in the echo height setting section 112b is set as the flaw detection level. Similarly, when the detection level setting button 113c is selected, the echo height set in the echo height setting section 112c is set as the flaw detection level. Similarly, when the detection level setting button 113d is selected, the echo height set in the echo height setting section 112d is set as the flaw detection level.

[0035] The judgment level setting buttons 114a to 114d are radio buttons for setting one of the echo heights set in the echo height setting sections 112a to 112d as the judgment level for a flaw. For example, when the judgment level setting button 114a is selected, the echo height set in the echo height setting section 112a is set as the flaw judgment level. Similarly, when the judgment level setting button 114b is selected, the echo height set in the echo height setting section 112b is set as the flaw judgment level. Similarly, when the judgment level setting button 114c is selected, the echo height set in the echo height setting section 112c is set as the flaw judgment level. Similarly, when the judgment level setting button 114d is selected, the echo height set in the echo height setting section 112d is set as the flaw judgment level.

[0036] The judgment length setting unit 115 is a setting unit for setting the length of the region having an echo height exceeding the flaw detection level set as described above before the result of the flaw inspection is judged to be a failure. That is, the judgment length setting unit 115 is a setting unit for setting the judgment length Lt, which is one of the judgment conditions (thresholds) for judging a flaw to be a failure.

[0037] In one embodiment, as described below, if a region having an echo height exceeding the flaw detection level exists continuously for a determination length Lt or more, the result of the flaw detection inspection is determined to be a failure. In one embodiment, as described later, when a region having an echo height exceeding the flaw judgment level exists, the result of the flaw detection inspection is judged to be a failure, regardless of whether the region exists continuously for a judgment length Lt or more. In other words, the flaw judgment level is a threshold value for judging a flaw to be a failure.

[0038] The flaw interval setting unit 116 is a setting unit that sets conditions for regarding a flaw as a continuous flaw even if there is an area with an echo height below the flaw detection level in between, when determining whether or not an area with an echo height exceeding the flaw detection level exists continuously for a judgment length Lt or more. In one embodiment, when determining whether or not a region with an echo height exceeding the flaw detection level exists continuously for a judgment length Lt or more, even if there is a region with an echo height below the flaw detection level in the middle, if the length of the region is less than the set length set by the flaw interval setting unit 116, the CPU 2 determines that it is a continuous flaw.

[0039] When the close button 118 is selected, the CPU 2 stores the setting contents on the judgment condition setting screen 100 in the storage device 3 as judgment condition data, and ends the process in the judgment condition setting step S33.

[0040] (Bevel shape setting step S35) The groove shape setting step S35 is a step for setting the groove shape of the welded portion of the test object. When the CPU 2 is instructed to set the groove shape, the CPU 2 causes the display device 5 to display, for example, a groove shape setting screen 200 as shown in FIG. The groove type selection section 201 is a screen display for selecting the type of groove, and when the groove type selection section 201 is selected, options for selecting the type of groove are displayed. For example, in one embodiment, when the groove type selection section 201 is selected, an option for selecting that the groove shape is V-shaped or X-shaped, and an option for selecting that the groove shape is J-shaped or U-shaped are displayed. The inspector can select any of the above options. This makes it easy to set the groove shape.

[0041] The dimension input section 202 is a screen display for inputting the dimensions of each part of the type of groove selected in the groove type selection section 201. The parts that can be input in the dimension input section 202 are changed depending on the type of groove selected in the groove type selection section 201. The groove shape reference image 203 is a screen display for illustrating each part of the groove that can be input in the dimension input unit 202. The image showing the shape of the groove in the groove shape reference image 203 is changed according to the type of groove selected in the groove type selection unit 201. The dimensions and the like indicated by alphabetical characters in the groove shape reference image 203 correspond to the alphabetical characters added to the input fields for the dimensions and the like in the dimension input unit 202. For example, the dimension indicated by the character a in the groove shape reference image 203 is the wall thickness of the specimen. Also, the input field for the dimension with the alphabet a added in the dimension input unit 202 is the input field for the wall thickness of the specimen.

[0042] In one embodiment, for example, when the type of groove selected in the groove type selection unit 201 is V-shaped or X-shaped, the dimensions of the next portion and the like can be input. 1. The plate thickness of the test object, that is, the wall thickness of the portion indicated by the symbol a in the groove shape reference image 203. 2. Groove depth and bevel angle, that is, the height and angle of the portion indicated by symbol b in the groove shape reference image 203. 3. Root radius, that is, the radius of the portion indicated by the symbol c in the groove shape reference image 203. 4. The length of the end portion that defines the root spacing protruding toward the opposing component of the weld, i.e., the length of the portion indicated by the symbol d in the groove shape reference image 203. 5. The length of the root face, that is, the height of the portion indicated by the symbol e in the groove shape reference image 203. 6. The height and angle of the inclined surface on the lower side of the root face in the groove shape reference image 203, that is, the height and angle of the portion indicated by the symbol f in the groove shape reference image 203. 7. Root spacing, that is, the gap length at the portion indicated by symbol g in the groove shape reference image 203. In this way, in one embodiment, the dimensions of each part of the groove can be input, thereby improving the setting accuracy of the groove shape.

[0043] The same applies to the case where the type of groove selected by the groove type selection unit 201 is a J-shape or a U-shape, for example.

[0044] The groove shape display image 204 is a screen display that displays an image of a groove reflecting the type of groove selected in the groove type selection section 201 and the input values ​​entered in the dimension input section 202.

[0045] When the update button 205 is selected, the CPU 2 stores the setting contents on the groove shape setting screen 200 as groove shape data in the storage device 3. In one embodiment, a plurality of groove shape data having different setting contents can be set and stored in the storage device 3. When the close button 206 is selected, the CPU 2 ends the process in the groove shape setting step S35.

[0046] (Evaluation target range input step S37) Here, the evaluation target range will be described. As described above, in the flaw detection image obtained based on the flaw detection data, in addition to the flaw echo, a geometric echo appears at the same time. In order to determine the presence or absence of a flaw in the test object and the position of the flaw by ultrasonic flaw detection, it is necessary to distinguish between the flaw echo and the geometric echo. Therefore, in one embodiment, a region within the interior of the subject where the flaw echo should be evaluated, that is, a region that includes the echo to be observed, is set as the evaluation target range.

[0047] In one embodiment, by setting the evaluation range, it is possible to eliminate the influence of shape echoes from areas other than the evaluation range. Specifically, in one embodiment, in a flaw detection image described later, an image of an echo from within the evaluation range can be displayed in the flaw detection image, and an image of an echo from outside the evaluation range can be prevented from being displayed in the flaw detection image. Also, in one embodiment, as described later, it is possible to perform a pass / fail judgment on the result of the flaw detection inspection based on an echo from within the evaluation range without being influenced by an echo from outside the evaluation range.

[0048] In one embodiment, the evaluation range can be set individually for each of the four pieces of flaw detection data obtained by the two flaw detectors 11 as described above.

[0049] The evaluation target range input step S37 is a step of receiving an input of an evaluation target range in a cross section of the test object including the groove of the weld. When an instruction to input the evaluation target range is received, the evaluation target range setting unit 21 displays, for example, an evaluation target range input screen 300 as shown in FIG. 8 on the display device 5.

[0050] The first flaw detector switching button 301 is a button for selection when setting an evaluation target range for flaw detection data obtained by one of the two flaw detectors 11. In one embodiment, the first flaw detector switching button 301 is a button for selection when setting an evaluation target range for flaw detection data obtained by, for example, the flaw detector 11 on the front side of the boiler. The second flaw detector switching button 302 is a button for selection when setting an evaluation target range for the flaw detector data obtained by the other of the two flaw detectors 11. In one embodiment, the second flaw detector switching button 302 is a button for selection when setting an evaluation target range for the flaw detector data obtained by, for example, the flaw detector 11 on the rear side of the boiler. FIG. 8 shows an example of a case where the second flaw detector switching button 302 is selected, and a screen display is displayed for setting an evaluation target range for the flaw detector data obtained by the flaw detector 11 on the rear side of the boiler.

[0051] The first range input section 303 is a screen display for inputting an evaluation target range. The first range input section 303 is a screen display for setting an evaluation target range for the flaw detector 11 selected by any one of the flaw detector switching buttons 301, 302 regarding the flaw detector data by the direct method. In first range input section 303, the range to be evaluated can be set as a polygonal frame, and it includes vertex number setting section 303a for selecting the number of vertices of the polygon, and a plurality of coordinate input sections 303b for inputting the coordinates of each vertex. The number of coordinate input portions 303b that appear in first range input portion 303 increases or decreases according to the number of vertices set in vertex number setting portion 303a. In each of the coordinate input sections 303b, for example, a position y in the tube axis direction and a position d in the plate thickness direction can be input.

[0052] The second range input section 304 is a screen display for inputting an evaluation target range. The second range input section 304 is a screen display for setting an evaluation target range for the flaw detector 11 selected by any one of the flaw detector switching buttons 301, 302 regarding the flaw detector data by the single reflection method. In second range input section 304, the evaluation range can be set as a polygonal frame, and includes a vertex number setting section 304a for selecting the number of vertices of the polygon, and a plurality of coordinate input sections 304b for inputting the coordinates of each vertex. The second range input section 304 is the same as the first range input section 303 in that the number of coordinate input sections 304b appearing in the second range input section 304 increases or decreases, and in that a position y in the tube axis direction and a position d in the plate thickness direction can be input in each coordinate input section 304b.

[0053] The first C-scope display image 311 is a flaw detection image showing the echo height in the flaw detection data by the direct method for the flaw detector selected by either of the flaw detector switching buttons 301, 302. The first C-scope display image 311 is a flaw detection image showing the echo height when the circumferential angle of the pipe 7, which is the test object, is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis. The first C-scope display image 311 shows only the echo height within the evaluation target range inputted in the first range input section 303. In other words, the first C-scope display image 311 does not show echoes outside the evaluation target range.

[0054] Note that the 1C scope display image 311 lacks information on the position in the axial direction of the pipe 7, i.e., information on the position along a certain direction in the plane scanned by electronic scanning. The 1C scope display image 311 shows information on the echo with the highest intensity among echoes from positions with the same circumferential angle and depth but different positions in the axial direction. A cursor 313 that can be operated by the examiner is superimposed and displayed on the first C-scope display image 311. The cursor 313 can be moved in the horizontal axis direction of the first C-scope display image 311.

[0055] The second C-scope display image 312 is a flaw detection image showing the echo height in the flaw detection data by the single reflection method for the flaw detector selected by either of the flaw detector switching buttons 301, 302. The second C-scope display image 312 is a flaw detection image showing the echo height when the circumferential angle of the pipe 7, which is the test object, is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis. The second C-scope display image 312 shows only the echo height within the evaluation target range inputted in the second range input section 304. In other words, the second C-scope display image 312 does not show echoes outside the evaluation target range.

[0056] In addition, the 2nd C-scope display image 312 lacks information on the position in the tube axis direction of the pipe 7, i.e., information on the position along a certain direction in the plane scanned by the electronic scan. In the 2nd C-scope display image 312, information on the echo with the highest intensity appears among echoes from positions with the same circumferential angle and depth but different positions in the tube axis direction. A cursor 314 that can be operated by the examiner is superimposed and displayed on the second C-scope display image 312. The cursor 314 is movable in the horizontal direction of the second C-scope display image 312.

[0057] The first S-scope display image 330 is a flaw detection image showing the echo height in the flaw detection data by the direct method for the flaw detector selected by any of the flaw detector switching buttons 301, 302. The first S-scope display image 330 is a display image in which a flaw detection image 331 showing the echo height for a certain cross section along the pipe axis direction of the pipe 7 (i.e., a cross section at a certain angular position in the circumferential direction) and a pipe cross section 332 showing the cross section of the pipe 7 and the groove shape of the weld are displayed in a superimposed manner. In addition, a polygonal frame 333 showing the evaluation target range inputted in the first range input section 303 is also displayed in a superimposed manner on the first S-scope display image 330. The position of each vertex of the frame 333 reflects the input contents in the first range input section 303. That is, the inspector can set the evaluation target range while checking the shape of the frame 333 in the first S-scope display image 330.

[0058] The flaw detection image 331 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 313 in the first C-scope display image 311. Therefore, when the inspector changes the position of the cursor 313 in the first C-scope display image 311, the flaw detection image 331 is changed to an image at an angular position corresponding to the changed position of the cursor 313.

[0059] The second S-scope display image 340 is a flaw detection image showing the echo height in the flaw detection data by the single reflection method for the flaw detector selected by any of the flaw detector switching buttons 301, 302. The second S-scope display image 340 is a display image in which a flaw detection image 341 showing the echo height for a certain cross section (i.e., a cross section at a certain angular position in the circumferential direction) along the pipe axis direction of the pipe 7 and a pipe cross section 342 showing the cross section of the pipe 7 and the groove shape of the weld are displayed in a superimposed manner. In addition, a frame 343 showing the evaluation target range inputted in the second range input section 304 is also displayed in a superimposed manner on the second S-scope display image 340. The position of each vertex of the frame 343 reflects the input contents in the second range input section 304. That is, the inspector can set the evaluation target range while checking the shape of the frame 343 in the second S-scope display image 340.

[0060] The flaw detection image 341 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 314 in the 2nd C-scope display image 312. Therefore, when the inspector changes the position of the cursor 314 in the 2nd C-scope display image 312, the flaw detection image 341 is changed to an image at an angular position corresponding to the changed position of the cursor 314.

[0061] The first C-scope display image 311, the flaw detection image 331 in the first S-scope display image 330, the second C-scope display image 312, and the flaw detection image 341 in the second S-scope display image 340 are displayed after the data read button 307 is selected and the flaw detection data stored in the storage device 3 is read. Although a detailed description will be omitted, when the data read button 307 is selected and the flaw detection data stored in the storage device 3 is read, it is possible to select which weld 8 the flaw detection data for is to be read.

[0062] Moreover, the piping cross-sectional view 332 in the first S-scope display image 330 and the piping cross-sectional view 342 in the second S-scope display image 340 are displayed after the data read button 307 is selected and groove shape data stored in the storage device 3 is read. That is, the groove type and dimensions of each part in the piping cross-sectional views 332 and 342 reflect the settings made in the groove shape setting step S35. Although detailed explanation will be omitted, when the data read button 307 is selected to read the groove shape data stored in the memory device 3, it is possible to select which of the multiple groove shape data stored in the memory device 3 is to be read.

[0063] The enlargement button 334 is an operation section for enlarging and displaying a part of the first S-scope display image 330. The reduction button 335 is an operation section for reducing and displaying the first S-scope display image 330. The enlargement button 344 is an operation section for enlarging and displaying a part of the second S-scope display image 340. The reduction button 345 is an operation section for reducing and displaying the second S-scope display image 340.

[0064] (Evaluation target range setting step S39) The evaluation target range setting step S39 is a step of setting an evaluation target range inside the subject. 8 is selected, the evaluation target range setting unit 21 stores the setting contents in the evaluation target range input screen 300 as evaluation target range data in the storage device 3. In one embodiment, a plurality of evaluation target range data with different setting contents can be set and stored in the storage device 3. When the close button 309 is selected, the evaluation target range setting unit 21 ends the processes in the evaluation target range input step S37 and the evaluation target range setting step S39.

[0065] (Regarding display step S5) The display step S5 will be described in detail below. FIG. 9 is a flowchart showing the flow of the process performed in the display step S5. In the display step S5, a flaw determination step S41, a pass / fail determination step S43, a display command generating step S45, an information display command generating step S471, a determination display command generating step S473, and a display command output step S49 are carried out, which will be described below. The program executed by the CPU 2 in the display step S5 is an ultrasonic inspection data processing program for processing inspection data obtained by performing ultrasonic inspection on the test object.

[0066] (Flaw determination step S41) The flaw determination step S41 is a step in which evaluation target data corresponding to an area within the evaluation target range is extracted from the flaw detection data, and an area inside the specimen that satisfies the determination conditions for determining whether or not there is a flaw is determined to be a flaw based on the extracted evaluation target data. Specifically, when a determination button for instructing the start of determination is selected on a main screen (not shown) displayed on the display device 5, the CPU 2 starts the process of a flaw determination step S41.

[0067] In the flaw determination step S41, the CPU 2 causes the display device 5 to display a screen display (not shown) which allows the user to select the flaw detection data group to be determined, i.e., the flaw detection data obtained by the direct method and the single reflection method for each of the two flaw detectors 11, and the evaluation range data to be used in the determination.

[0068] When the inspector operates to select the flaw detection data group to be judged and the evaluation target range data to be used in the judgment, the CPU 2 reads the judgment condition data in addition to the data of the selected flaw detection data group and the evaluation target range data from the storage device 3. Then, the CPU 2 refers to the evaluation target range data from each flaw detection data of the read flaw detection data group, and extracts data corresponding to the area within the evaluation target range as evaluation target data.

[0069] Next, the CPU2 judges that an area inside the specimen that satisfies the judgment conditions in the judgment condition data is a flaw for the extracted evaluation target data. Specifically, the CPU2 judges whether or not an area with an echo height exceeding the flaw detection level exists continuously for the judgment length Lt or more based on the evaluation target data extracted from each flaw detection data of the flaw detection data group. If an area with an echo height exceeding the flaw detection level exists continuously for the judgment length Lt or more, the CPU2 judges the area to be a flaw and specifies the position, length, maximum echo height, etc. of the area. Furthermore, the CPU 2 judges whether or not there is a region with an echo height exceeding a flaw judgment level, based on the evaluation target data extracted from each piece of flaw inspection data in the flaw inspection data group. Furthermore, if there is an area with an echo height exceeding the flaw determination level, the CPU 2 determines that the area is a flaw, and specifies the position, length, maximum echo height, etc. of the area. Therefore, the influence of the shape echo can be suppressed and flaws can be detected with high accuracy.

[0070] (Pass / fail judgment step S43) In pass / fail determination step S43, CPU 2 determines that the test is pass if there is no area determined to be unsuccessful in flaw determination step S41, and determines that the test is fail if there is an area determined to be unsuccessful in flaw determination step S41.

[0071] (Display command generation step S45) The display command generating step S45 is a step of generating a command for causing the display device 5 to display a flaw detection image indicating an echo height, which is the signal intensity of the evaluation target data at each position inside the subject. In the display command generating step S45, the display command generating unit 22 generates image data of a flaw detection image indicating an echo height based on the evaluation target data extracted in the flaw judgment step S41. When generating the image data of the flaw detection image, the display command generating unit 22 reflects the setting contents of the display color included in the judgment condition data, i.e., the setting contents of the display color on the judgment condition setting screen 100.

[0072] (Information display command generation step S471) The information display command generating step S471 is a step of generating a command for causing the display device 5 to display at least information on the position on the subject of the region determined as not being capable of flaw determination step S41. In the information display command generation step S471, the display command generation unit 22 generates display data for displaying information such as the position, length, and maximum echo height of the area determined to be a flaw in the flaw determination step S41.

[0073] (Judgment display command generation step S473) The judgment display command generating step S473 is a step of generating a command for causing the display device 5 to display the judgment result in the pass / fail judgment step S43. In the judgment display command generating step S473, the display command generating unit 22 generates display data for judgment displays 471, 472 (see FIGS. 10 and 11) showing whether the judgment result in the pass / fail judgment step S43 is pass or fail on the judgment result display screen 400 described later. This makes it easy to recognize whether the result of ultrasonic flaw detection of the test object is pass or fail.

[0074] (Display command output step S49) In the display command output step S49, the display command generating unit 22 outputs the image data and display data generated in each of the steps of the display command generating step S45, the information display command generating step S471, and the judgment display command generating step S473 to the display device 5 as a display command.

[0075] 10 and 11 are diagrams showing a determination result display screen 400 which displays, on one screen, image data and display images based on display data generated in each step described above. FIG. 10 shows a judgment result display screen 400 for the image data and the display image based on the display data generated in each step based on the first judgment condition. FIG. 11 shows a judgment result display screen 400 for the image data and the display image based on the display data generated in each step based on the second judgment condition.

[0076] The judgment result display screen 400 displays a first D scope display image 410, a first S scope display image 411, and a first beam image 412. The judgment result display screen 400 also displays a second D scope display image 420, a second S scope display image 421, and a second beam image 422. On the judgment result display screen 400, a third D scope display image 430, a third S scope display image 431, and a third beam image 432 are displayed. On the judgment result display screen 400, a fourth D scope display image 440, a fourth S scope display image 441, and a fourth beam image 442 are displayed.

[0077] Furthermore, on the judgment result display screen 400, a cross-section display image 450 and a flaw information display field 460 are displayed.

[0078] The first-D scope display image 410 is a flaw detection image showing the echo height in flaw detection data by the direct method for the flaw detector 11 at the front of the boiler, for example. The first-D scope display image 410 is a flaw detection image when the circumferential angle of the pipe 7, which is the object of inspection, is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis, and shows only the echo height within the evaluation target range. In other words, the first-D scope display image 410 does not show echoes outside the evaluation target range that would appear if the evaluation target range was not set. This point is the same for the second-D scope display image 420 to the fourth-D scope display image 440 described later.

[0079] When the full range display check box 477 shown in FIGS. 10 and 11 is selected, echoes outside the range to be evaluated are also displayed in the first to fourth D scope display images 410 to 440.

[0080] In the first D scope display image 410, information on the position in the tube axis direction of the pipe 7, i.e., information on the position along a certain direction in the plane scanned by electronic scanning, is missing. In the first D scope display image 410, information on the echo with the highest intensity among echoes from positions with the same circumferential angle and depth but different positions in the tube axis direction appears. This point is the same for the second D scope display image 420 to the fourth D scope display image 440 described later. A cursor 413 that can be operated by the examiner is superimposed on the 1D scope display image 410. The cursor 413 is movable in the horizontal axis direction of the 1D scope display image 410.

[0081] The second D scope display image 420 is, for example, a flaw detection image showing the echo height in flaw detection data obtained by the reflection method for the single flaw detector 11 on the front side of the boiler. A cursor 423 that can be operated by the examiner is superimposed on the 2D scope display image 420. The cursor 423 is movable in the horizontal axis direction of the 2D scope display image 420.

[0082] The 3D scope display image 430 is, for example, a flaw detection image showing the echo height in flaw detection data obtained by the direct method for the flaw detector 11 on the rear side of the boiler. A cursor 433 that can be operated by the examiner is superimposed on the 3D scope display image 430. The cursor 433 can be moved in the horizontal axis direction of the 3D scope display image 430.

[0083] The fourth D scope display image 440 is, for example, a flaw detection image showing the echo height in flaw detection data obtained by the single reflection method for the flaw detector 11 on the rear side of the boiler. A cursor 443 that can be operated by the examiner is superimposed on the fourth-dimensional scope display image 440. The cursor 443 is movable in the horizontal direction of the fourth-dimensional scope display image 440.

[0084] The first S-scope display image 411 is, for example, a flaw detection image showing the echo height in flaw detection data by the direct method for the flaw detector 11 on the front side of the boiler. The first S-scope display image 411 is a display image in which a flaw detection image 411a showing the echo height for a certain cross section along the axial direction of the pipe 7, a pipe cross section 411b showing the cross section of the pipe 7 and the groove shape of the welded part, and a frame 411c showing the evaluation target range are superimposed. In the flaw detection image in the first S-scope display image 411, not only the echo height within the evaluation target range but also the echo height outside the evaluation target range are displayed, but only the echo height within the evaluation target range may be displayed. In other words, the first S-scope display image 411 may be configured not to display echoes outside the evaluation target range that would appear if the evaluation target range was not set. This point is the same for the second S-scope display image 421 to the fourth S-scope display image 441 described later. The flaw detection image in the first S-scope display image 411 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 413 in the first D-scope display image 410. Therefore, when the inspector changes the position of the cursor 413, the flaw detection image in the first S-scope display image 411 is changed to an image at an angular position corresponding to the changed position of the cursor 413.

[0085] The second S-scope display image 421 is, for example, a flaw detection image showing the echo height in flaw detection data by a single reflection method for the flaw detector 11 at the front side of the boiler. The second S-scope display image 421 is a display image in which, like the first S-scope display image 411, a flaw detection image showing the echo height for a certain cross section along the axial direction of the pipe 7, a pipe cross-sectional view showing the cross section of the pipe 7 and the groove shape of the weld, and a frame showing the evaluation target range are superimposed. The flaw detection image in the second S-scope display image 421 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 423 in the second D-scope display image 420. Therefore, when the inspector changes the position of the cursor 423, the flaw detection image in the second S-scope display image 421 is changed to an image at an angular position corresponding to the changed position of the cursor 423.

[0086] The third S-scope display image 431 is, for example, a flaw detection image showing the echo height in flaw detection data by the direct method for the flaw detector 11 on the rear side of the boiler. The third S-scope display image 431 is a display image in which, like the first S-scope display image 411, a flaw detection image showing the echo height for a cross section along the axial direction of the pipe 7, a pipe cross-sectional view showing the cross section of the pipe 7 and the groove shape of the weld, and a frame showing the evaluation target range are superimposed. The flaw detection image in the third S-scope display image 431 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 433 in the 3D-scope display image 430. Therefore, when the inspector changes the position of the cursor 433, the flaw detection image in the third S-scope display image 431 is changed to an image at an angular position corresponding to the changed position of the cursor 433.

[0087] The fourth S-scope display image 441 is, for example, a flaw detection image showing the echo height in the flaw detection data by the single reflection method for the flaw detector 11 on the rear side of the boiler. The fourth S-scope display image 441 is a display image in which, like the first S-scope display image 411, a flaw detection image showing the echo height for a certain cross section along the axial direction of the pipe 7, a pipe cross-sectional view showing the cross section of the pipe 7 and the groove shape of the weld, and a frame showing the evaluation target range are superimposed. The flaw detection image in the fourth S-scope display image 441 is a flaw detection image at an angular position in the circumferential direction of the pipe 7 corresponding to the position of the cursor 443 in the fourth D-scope display image 440. Therefore, when the inspector changes the position of the cursor 443, the flaw detection image in the fourth S-scope display image 441 is changed to an image at an angular position corresponding to the changed position of the cursor 443.

[0088] The first beam image 412 is, for example, a diagram showing a beam image of a focal law obtained by the direct method for the flaw detector 11 on the front side of the boiler. The second beam image 422 is, for example, a diagram showing a beam image of a focal law obtained by the single reflection method for the flaw detector 11 on the front side of the boiler. The third beam image 432 is, for example, a diagram showing a beam image of a focal law obtained by the direct method for the flaw detector 11 on the rear side of the boiler. The fourth beam image 442 is, for example, a diagram showing a beam image of a focal law obtained by the single reflection method for the flaw detector 11 on the rear side of the boiler.

[0089] Each of the S-scope display images 411-441 and each of the beam image images 412-442 is enlarged when the plus button displayed at the top of each image display is selected, and is reduced when the minus button is selected. In addition, the type of groove and the dimensions of each part in each of the S-scope display images 411-441 and each of the beam image images 412-442 reflect the settings made in the groove shape setting step S35.

[0090] The cross-section display image 450 is a flaw detection image showing the echo height when viewed along the axial direction of the pipe 7, and shows only the echo height within the evaluation range. In other words, the cross-section display image 450 does not show echoes outside the evaluation range that would appear if the evaluation range was not set. The cross-section display image 450 can select which of two directions along the axial direction of the pipe 7 an image viewed from is to be displayed. For example, in the cross-section display image 450 shown in Figs. 10 and 11, it is possible to select whether to display an image viewed from the front side of the boiler or an image viewed from the rear side of the boiler.

[0091] The flaw information display field 460 displays information such as the position, length, and maximum echo height of the area determined to be a flaw in the flaw determination step S41. If there is no area determined to be a flaw in the flaw determination step S41, the flaw information display field 460 does not display information about the flaw. For example, the display content of the flaw information display field 460 in FIG. 10 is an example of a case where there is no area satisfying the first determination condition within the evaluation target range. Also, for example, the display content of the flaw information display field 460 in FIG. 11 is an example of a case where there is an area satisfying the second determination condition within the evaluation target range.

[0092] If the test result is judged as passed in pass / fail judgment step S43, a pass judgment display 471 is displayed on the judgment result display screen 400 as shown in FIG. 10. If the test result is judged as failed in pass / fail judgment step S43, a fail judgment display 472 is displayed on the judgment result display screen 400 as shown in FIG. 11.

[0093] When the confirmation button 475 is selected while the determination result display screen 400 based on the first determination condition is displayed on the display device 5, the determination result display screen 400 based on the second determination condition is displayed on the display device 5. Similarly, when the confirmation button 475 is selected while the determination result display screen 400 based on the second determination condition is displayed on the display device 5, the determination result display screen 400 based on the first determination condition is displayed on the display device 5.

[0094] That is, when the confirmation button 475 is selected, the CPU 2 executes a judgment condition switching step S510, as shown in FIG. 12, and switches the judgment result display screen 400 displayed on the display device 5 between a judgment result display screen 400 based on the first judgment condition and a judgment result display screen 400 based on the second judgment condition. 12 is a flowchart showing the process in the judgment condition switching step S510. The process in the judgment condition switching step S510 is started when the display command output step S49 is executed and the judgment result display screen 400 is displayed. Alternatively, the process in the judgment condition switching step S510 is started again after the judgment condition switching step S510 is executed and the judgment result display screen 400 is switched. In step S511, CPU 2 waits until confirmation button 475 on judgment result display screen 400 is selected, and when confirmation button 475 is selected, the process proceeds to step S513 to execute a display command switching process. In the display command switching process of step S513, CPU 2 outputs image data or display data relating to either the first judgment condition or the second judgment condition as a display command to display device 5, instead of image data or display data relating to the other judgment condition, instead of image data or display data relating to either the first judgment condition or the second judgment condition currently being output to display device 5.

[0095] 10 and 11, the specimens involved in the judgment are the same, and the difference between pass / fail and whether information about flaws is displayed in the flaw information display field 460 is due to the difference between the first judgment condition and the second judgment condition. That is, even for the same specimen, the result of the pass / fail judgment in the pass / fail judgment step S43 may differ.

[0096] In the ultrasonic inspection data processing device 1 of one embodiment, the display command generating unit 22 can generate image data of a three-dimensional inspection image that three-dimensionally displays the distribution state of echo heights within the evaluation target range, based on the evaluation target data. 13 shows a display image 600 of the 3D inspection image displayed on the display device 5 based on the image data of the 3D inspection image generated by the display command generating unit 22. The display image 600 includes a 3D inspection display image 610 showing the distribution state of the echo height within the evaluation target range, and a cross-sectional display image 620 showing the echo height when viewed along the axial direction of the pipe 7. In the three-dimensional flaw detection display image 610 and the cross-sectional display image 620, only the echo height within the evaluation target range is displayed.

[0097] The three-dimensional flaw detection display image 610 can be changed to any display angle within the display image 600. The circle displayed at the center of the tube axis direction in the three-dimensional flaw detection display image 610 is a circle indicating the position of the groove. The positions of both ends of the tube axis direction in the three-dimensional flaw detection display image 610 correspond to, for example, the widest evaluation target range among the evaluation target ranges related to the above-mentioned four flaw detection data. The cross-section display image 620 can be selected to display an image viewed from one of two directions along the axial direction of the pipe 7. For example, in the cross-section display image 620 shown in Fig. 13, it is possible to select whether to display an image viewed from the front side of the boiler or an image viewed from the rear side of the boiler.

[0098] (Regarding evaluation step S7) In the evaluation step S7, the inspector can evaluate the presence or absence of flaws within the evaluation range based on the flaw detection image, information about flaws, and the pass / fail judgment display on the judgment result display screen 400 displayed on the display device 5. Specifically, for example, if the first judgment condition is a judgment condition that is normally set for judging the presence or absence of a flaw, the judgment result based on the first judgment condition can be used to evaluate the pass / fail of the test specimen.

[0099] For example, if the judgment result based on the first judgment condition is pass, by checking the judgment result based on the second judgment condition, the inspector can evaluate whether the judgment result based on the first judgment condition is pass with a certain degree of margin relative to the first judgment condition, or whether it is pass with little margin relative to the first judgment condition. That is, for example, if the judgment result based on the first judgment condition is pass and the judgment result based on the second judgment condition is pass, the inspector can evaluate that the judgment result based on the first judgment condition is judged to be pass with a certain degree of margin compared to the first judgment condition. Furthermore, for example, if the judgment result based on the first judgment condition is pass but the judgment result based on the second judgment condition is fail, the inspector can evaluate that the judgment result based on the first judgment condition was judged to be pass with not much margin for error compared to the first judgment condition.

[0100] In addition, if the judgment result based on the first judgment condition is pass but the judgment result based on the second judgment condition is fail, the inspector can confirm the condition of the defect detected based on the second judgment condition by checking the information of the defect detected based on the second judgment condition on the judgment result display screen 400 based on the second judgment condition. For example, by checking the state of a flaw detected based on the second judgment condition, it is possible to judge whether or not the flaw should be repaired just in case.

[0101] In this manner, according to the embodiment described above, the CPU 2 executes the evaluation target range setting step S39 and the display command generating step S45, so that the position of the flaw in the test object can be determined based on the flaw detection image corresponding to the area in the evaluation target range. Therefore, by appropriately setting the evaluation target range according to the shape of the test object, it is possible to suppress the appearance of the shape echo in the flaw detection image. This improves the accuracy of distinguishing between flaw echo and shape echo regardless of the skill level of the inspector.

[0102] Furthermore, according to the embodiment described above, in the evaluation range input step S37, the setting input of the evaluation range within the cross section of the test subject including the groove of the weld is accepted, thereby making it possible to suppress the appearance of shape echoes in the flaw detection image of the test subject including the groove of the weld.

[0103] According to the embodiment described above, in the evaluation target range input step S37, the first S-scope display image 330 and the second S-scope display image 340, which are setting screens in which the groove shape of the welded portion 8 of the test subject set in the groove shape setting step S35 is superimposed on the cross-sectional shape of the test subject, are displayed on the display device 5. This makes it possible to set the evaluation target range by referring to the groove shapes of the welded portion of the test subject displayed in the first S-scope display image 330 and the second S-scope display image 340, and therefore makes it possible to suppress the appearance of a shape echo caused by the groove shape of the welded portion in the flaw detection image.

[0104] In addition, since the above-mentioned method for evaluating an object according to the embodiment includes the flaw detection step S1, the setting step S3, the display step S5, and the evaluation step S7, the evaluation range can be appropriately set according to the shape of the object, thereby suppressing the appearance of shape echoes in the flaw detection image. This improves the accuracy of distinguishing between flaw echoes and shape echoes regardless of the skill level of the inspector, and allows the presence or absence of flaws inside the object to be evaluated with high accuracy.

[0105] The present disclosure is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications. For example, in the above-described embodiment, in the flaw determination step S41 and the pass / fail determination step S43, flaw determination and pass / fail determination are performed in advance according to the first determination condition, and flaw determination and pass / fail determination are performed in advance according to the second determination condition. However, for example, flaw determination and pass / fail determination are performed in advance according to either the first or second determination condition, and when a switch of the determination conditions is instructed by selecting the confirmation button 475 while the determination result display screen 400 is displayed, the determination conditions in the flaw determination step S41 and the pass / fail determination step S43 are switched from either the first or second determination condition to the other, and a failure determination and pass / fail determination are performed according to the switched determination condition. By doing this, it is possible to confirm how the detection state changes without changing the judgment conditions.

[0106] (Other embodiments) In the embodiment described above, the flaw detection data group was a set of four flaw detection data for one location of the circumferential weld 8 of the piping 7, including flaw detection data by the direct method using the flaw detector 11 on the front side of the boiler, flaw detection data by the single reflection method using the flaw detector 11 on the front side of the boiler, flaw detection data by the direct method using the flaw detector 11 on the rear side of the boiler, and flaw detection data by the single reflection method using the flaw detector 11 on the rear side of the boiler. In contrast, a flaw detection data group according to another embodiment described below is flaw detection data for one location of the circumferential welded portion 8 of the pipe 7, and is a set of flaw detection data acquired by a flaw detector 11 arranged on one side in the direction of the axis AXc with respect to the welded portion 8. Specifically, a flaw detection data group according to another embodiment is a set of flaw detection data including at least first flaw detection data acquired at a first position P1 located a first distance Y1 away from the welded portion 8 on one side in the direction of the axis AXc, and second flaw detection data acquired at a second position P2 located a second distance Y2 different from the first distance Y1 away from the one side. In the following description, it is assumed that this set of inspection data further includes third inspection data acquired at a third position P3 located a third distance Y3 different from the first distance Y1 and the second distance Y2 on the above-mentioned one side.

[0107] The welded portion 8 according to another embodiment is a butt welded portion that connects a pipe 7 on one side in the direction of the axis AXc to a pipe 7 on the other side across the welded portion 8. The above-mentioned first distance Y1 to third distance Y3 are distances from the center Cw along the extension direction (circumferential direction) of the butt welded portion (see FIG. 14 described below).

[0108] Hereinafter, another embodiment will be described in which inspection data is acquired by varying the distance from the weld 8 to the inspection element 11 in the direction of the axis AXc. In the following description, differences from the description in the above-mentioned embodiment will be mainly described, and details of matters that are not specifically described will be omitted as they are, in principle, the same as the description in the above-mentioned embodiment. In the following description, the same reference numerals will be used to designate the same configurations as those in the above-mentioned embodiment.

[0109] As shown in FIG. 2, a method for evaluating a specimen according to another embodiment includes a flaw detection step S1, a setting step S3, a display step S5, and an evaluation step S7.

[0110] (Flaw detection step S1) FIG. 14 is a diagram showing a schematic view of an ultrasonic inspection performed in the inspection step S1 for acquiring the inspection data of the inspection data group according to another embodiment. In the flaw detection step S1 in another embodiment, flaw detection data is obtained by a plurality of flaw detectors 11 that are arranged on one side of the welded portion 8 in the direction of the axis AXc and at different distances from the welded portion 8. In the example shown in Fig. 14, the ultrasonic flaw detector 10 has two flaw detectors 11 disposed on one side of the welded portion 8 in the direction of the axis AXc and at different distances from the welded portion 8 attached to a movement device 56 for the flaw detectors 11. In the example shown in Fig. 14, the movement device 56 is configured to be able to move the flaw detectors 11 in the circumferential direction of the pipe 7 manually or by a driving force such as a motor. The movement device 56 shown in Fig. 14 is configured to be able to move the flaw detectors 11 so that the relative positions of the two flaw detectors 11 in the circumferential direction do not shift and so that the distance apart from the welded portion 8 in the direction of the axis AXc does not change.

[0111] 14, since the difference between the distance of one flaw detector 11 from the welded portion 8 and the distance of the other flaw detector 11 from the welded portion 8 is small, one flaw detector 11 and the other flaw detector 11 are arranged offset in the circumferential direction of the pipe 7. However, if the difference between the distance of one flaw detector 11 from the welded portion 8 and the distance of the other flaw detector 11 from the welded portion 8 is relatively large and one flaw detector 11 and the other flaw detector 11 do not interfere with each other, one flaw detector 11 and the other flaw detector 11 may be arranged at the same circumferential position. Moreover, the ultrasonic flaw detector 10 according to another embodiment may include three or more flaw detectors 11 attached to the moving device 56 so that the distances from the welded portion 8 are different from each other.

[0112] In the ultrasonic flaw detector 10 according to another embodiment, at least one flaw detector 11 is configured so that its position in the direction of the axis AXc can be adjusted by the moving device 56. With this, by moving only the position of the flaw detector 11 in the direction of the axis AXc while the moving device 56 is attached to the piping 7, the distance of the flaw detector 11 from the welded portion 8 can be easily changed without detaching the moving device 56 from the piping 7. The configuration of the moving device 56 in the ultrasonic flaw detector 10 according to the other embodiment will be described later.

[0113] In the flaw detection step S1 in another embodiment, when using the ultrasonic flaw detection device 10 shown in Figure 14, one of the two flaw detectors 11 is set so that its distance from the welded portion 8 is a first distance Y1, and the other of the two flaw detectors 11 is set so that its distance from the welded portion 8 is a second distance Y2, and ultrasonic flaw detection is performed while rotating the two flaw detectors 11 once in the circumferential direction to obtain first flaw detection data and second flaw detection data. Next, the position of one of the two flaw detectors 11, for example the flaw detector 11 that has been set so that its distance from the welded portion 8 is the second distance Y2, is adjusted in the direction of the axis AXc to set its distance from the welded portion 8 to the third distance Y3, and ultrasonic flaw detection is performed while rotating the two flaw detectors 11 once in the circumferential direction to obtain third flaw detection data. At this time, it is not necessary to perform flaw detection with the flaw detector 11 that has been set so that its distance from the welded portion 8 is the first distance Y1, for example.

[0114] In the following description, the flaw detector 11 that is set so that its distance from the welded portion 8 is the first distance Y1 is also referred to as the first flaw detector 11A. Similarly, the flaw detector 11 that is set so that its distance from the welded portion 8 is the second distance Y2 is also referred to as the second flaw detector 11B, and the flaw detector 11 that is set so that its distance from the welded portion 8 is the third distance Y3 is also referred to as the third flaw detector 11C. In the example shown in FIG. 14, one of the two flaw detectors 11 is a first flaw detector 11A, and the other of the two flaw detectors 11 is a second flaw detector 11B and a third flaw detector 11C.

[0115] In addition, when the ultrasonic inspection device 10 has only one flaw detector 11, the first flaw detector data to the third flaw detector data are acquired by performing ultrasonic inspection three times by adjusting the position of the flaw detector 11 in the axis line AXc direction. In this case, the one flaw detector 11 is also the first flaw detector 11A, the second flaw detector 11B, and the third flaw detector 11C. Furthermore, when the ultrasonic flaw detector 10 is equipped with three or more flaw detectors 11, the positions of the three flaw detectors 11 in the direction of the axis AXc are set so that the distances from the welded portion 8 are a first distance Y1, a second distance Y2, and a third distance Y3, and ultrasonic flaw detection is performed once to acquire the third flaw detector data from the first flaw detector data. In this case, the flaw detector 11 whose distance from the welded portion 8 is the first distance Y1 is the first flaw detector 11A, the flaw detector 11 whose distance from the welded portion 8 is the second distance Y2 is the second flaw detector 11B, and the flaw detector 11 whose distance from the welded portion 8 is the third distance Y3 is the third flaw detector 11C.

[0116] In another embodiment, the inspection data obtained by ultrasonic inspection is stored in a storage device (not shown) of the ultrasonic inspection device 10 together with information on the circumferential movement distance from a reference position in the circumferential direction measured by the encoder 13. The reference position in the circumferential direction can be set to any position in the circumferential direction of the piping 7, but may be, for example, the circumferential position of any of the flaw detectors 11 at the start of ultrasonic flaw detection (at the time when the movement of the flaw detector 11 by the moving device 56 begins). In the example shown in FIG. 14, information on the difference in the circumferential positions of the two flaw detectors 11 is stored in a storage device (not shown) of the ultrasonic flaw detector 10 together with the flaw detection data.

[0117] In another embodiment, the first flaw detection data, the second flaw detection data, and the third flaw detection data are each either flaw detection data by a direct method or flaw detection data by a single reflection method. In the following description, for example, the first flaw detection data is flaw detection data by a direct method, and the second flaw detection data and the third flaw detection data are flaw detection data by a single reflection method, but the present disclosure is not limited to this combination of flaw detection data. For example, the first flaw detection data may be flaw detection data by a single reflection method, and at least one of the second flaw detection data and the third flaw detection data may be flaw detection data by a direct method.

[0118] In another embodiment, the inspection data obtained by ultrasonic inspection includes first inspection data and second inspection data obtained while simultaneously moving a first inspection element 11A for obtaining the first inspection data and a second inspection element 11B for obtaining the second inspection data in the extension direction of the welded portion 8 on the surface of the piping 7 on one side of the axis AXc direction relative to the welded portion 8.

[0119] In addition, in the flaw detection step S1 of another embodiment, a set of three flaw detection data, namely, first flaw detection data, second flaw detection data, and third flaw detection data, is obtained for each circumferential weld 8 of the pipe 7 by the ultrasonic flaw detection device 10 shown in FIG. That is, in the ultrasonic inspection device 10 of the other embodiment, the three sets of inspection data are obtained as many times as the number of inspection points.

[0120] The specimen is not limited to the pipe 7 described above, but may be a component other than a circular pipe having a butt weld connecting two components, such as two flat plates connected by a butt weld.

[0121] The flaw detection data in other embodiments is flaw detection data acquired at a position away from the welded portion 8 in one of the directions (axis AXc direction) perpendicular to the extension direction (circumferential direction) of the welded portion 8, but may be flaw detection data acquired at a position away from the welded portion 8 in a direction slightly shifted from the direction perpendicular to the extension direction of the welded portion 8. That is, the flaw detection data in other embodiments may be flaw detection data acquired at a position away from the welded portion 8 in one of the directions intersecting the extension direction of the welded portion 8.

[0122] (Setting step S3) In the setting step S3 according to another embodiment, as shown in FIG. 4, a flaw detection data reading step S31, a judgment condition setting step S33, a groove shape setting step S35, an evaluation target range input step S37, and an evaluation target range setting step S39 are performed.

[0123] (Flaw detection data reading step S31) In another embodiment, in a flaw detection data reading step S31, the CPU 2 reads in the flaw detection data group including the first flaw detection data to the third flaw detection data as described above, together with data measured by the encoder 13 and information regarding the difference in the circumferential positions of the two flaw detection probes 11, and stores it in the memory device 3. That is, the flaw detection data reading step S31 according to the other embodiment includes a first reading step of reading first flaw detection data, a second reading step of reading second flaw detection data, and a third reading step of reading third flaw detection data.

[0124] (Determination condition setting step S33) In the judgment condition setting step S33 according to another embodiment, when making a pass / fail judgment on the results of the flaw detection inspection, different judgment conditions can be set for each of the first flaw detection data, the second flaw detection data, and the third flaw detection data.

[0125] (Bevel shape setting step S35) In the groove shape setting step S35 according to another embodiment, the same processing content as the processing content in the groove shape setting step S35 according to the above-described embodiment is executed.

[0126] (Evaluation target range input step S37) In the evaluation target range input step S37 according to another embodiment, the evaluation target range can be inputted in such a manner that a different evaluation target range is inputted for each of the first flaw detection data, the second flaw detection data, and the third flaw detection data.

[0127] (Evaluation target range setting step S39) In the evaluation target range setting step S39 according to another embodiment, the evaluation target range can be set to a different evaluation target range for each of the first flaw detection data, the second flaw detection data, and the third flaw detection data. In the evaluation range setting step S39 in another embodiment, a first evaluation range can be set for the first flaw detection data, a second evaluation range can be set for the second flaw detection data, and a third evaluation range can be set for the third flaw detection data. That is, in the evaluation target range setting step S39 according to another embodiment, when the update button 308 of the evaluation target range input screen 300 shown in FIG. 8 is selected, the input contents in the evaluation target range input step S37 are stored in the memory device 3 as evaluation target range data.

[0128] (Display step S5) In the display step S5 according to another embodiment, as shown in FIG. 9, a flaw determination step S41, a pass / fail determination step S43, a display command generation step S45, an information display command generation step S471, a determination display command generation step S473, and a display command output step S49 are performed.

[0129] (Flaw determination step S41) In the flaw determination step S41 according to another embodiment, flaw determination is performed in each of the first flaw detection data, the second flaw detection data, and the third flaw detection data in the same manner as in the flaw determination step S41 according to the one embodiment.

[0130] (Pass / fail judgment step S43) In the pass / fail determination step S43 according to another embodiment, if the presence of a flaw not passing the flaw determination step S41 is found in any of the first flaw detection data, the second flaw detection data, and the third flaw detection data, it is determined to be a fail. Conversely, in the pass / fail determination step S43 in another embodiment, if no defects that could not be determined in the flaw determination step S41 are found in any of the first flaw detection data, the second flaw detection data, and the third flaw detection data, the test is determined to be pass.

[0131] (Display command generation step S45) In the display command generating step S45 according to another embodiment, the display command generating unit 22 generates image data of a flaw detection image indicating an echo height based on the evaluation target data extracted in the flaw determination step S41. Note that the image data of the flaw detection image generated by the display command generating unit 22 is, for example, image data of a display image as shown in FIG. 15 described later.

[0132] (Information display command generation step S471) In the information display command generating step S471 according to the other embodiment, the same processing content as the processing content in the information display command generating step S471 according to the above-described embodiment is executed.

[0133] (Judgment display command generation step S473) In the determination display command generating step S473 according to another embodiment, the same processing content as the processing content in the determination display command generating step S473 according to the above-described embodiment is executed based on the determination result in the pass / fail determination step S43.

[0134] (Display command output step S49) In a display command output step S49 in another embodiment, the display command generation unit 22 outputs the image data and display data generated in each of the steps of the display command generation step S45, the information display command generation step S471, and the judgment display command generation step S473 to the display device 5 as a display command.

[0135] FIG. 15 is a diagram showing a determination result display screen 400 according to another embodiment. In the judgment result display screen 400 according to another embodiment, instead of the first D scope display image 410, the first S scope display image 411, the first beam image image 412, the second D scope display image 420, the second S scope display image 421, the second beam image image 422, the 3D scope display image 430, the third S scope display image 431, the third beam image image 432, the fourth D scope display image 440, the fourth S scope display image 441, and the fourth beam image image 442 as shown in FIG. 10 and FIG. 11, the first D scope display image 1410, the first S scope display image 1411, the first beam image image 1412, the second D scope display image 1420, the second S scope display image 1421, the second beam image image 1422, the 3D scope display image 1430, the third S scope display image 1431, and the third beam image image 1432 as shown in FIG. 15 are displayed.

[0136] On the determination result display screen 400 according to another embodiment, a cross-section display image 1450 according to another embodiment as shown in FIG. 15 is displayed instead of the cross-section display image 450 according to the one embodiment. Moreover, on the judgment result display screen 400 according to the other embodiment, a flaw information display field 460 and the like are also displayed, similarly to the judgment result display screen 400 according to the one embodiment.

[0137] (1st D scope display image 1410) The 1D scope display image 1410 is a flaw detection image showing the echo height in the first flaw detection data. The 1D scope display image 1410 is a flaw detection image when the circumferential position of the pipe 7, which is the test object, is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis, and shows only the echo height within the evaluation target range. In other words, the 1D scope display image 1410 does not show echoes outside the evaluation target range that would appear if the evaluation target range was not set. This point is the same for the 2D scope display image 1420 and the 3D scope display image 1430 described later.

[0138] That is, in the display command generation step S45 according to another embodiment, evaluation target data corresponding to an area within the evaluation target range is extracted from the flaw detection data read in the flaw detection data reading step S31, and a command is generated to cause the display device to display a flaw detection image that shows the signal intensity of the evaluation target data at each position inside the subject and does not show signal intensity outside the evaluation target range.

[0139] In addition, in the evaluation target range setting step S39 of another embodiment, the first evaluation target range, the second evaluation target range, and the third evaluation target range can be set as described above, and therefore in the display command generation step S45 of another embodiment, a command is generated to extract first evaluation target data corresponding to the area within the first evaluation target range from the first flaw detection data read in the flaw detection data reading step S31, and to display on the display device 5 as the first flaw detection image a flaw detection image that shows the signal intensity of the first evaluation target data at each position inside the subject and does not show signal intensity outside the first evaluation target range. Similarly, in a display command generation step S45 in another embodiment, second evaluation target data corresponding to an area within the second evaluation target range is extracted from the second inspection data read in the inspection data reading step S31, and a command is generated to cause the display device 5 to display as a second inspection image a inspection image that shows the signal intensity of the second evaluation target data at each position inside the subject and does not show signal intensity outside the second evaluation target range. In another embodiment, in a display command generation step S45, third evaluation target data corresponding to an area within the third evaluation target range is extracted from the third inspection data read in the inspection data reading step S31, and a command is generated to display on the display device 5 as a third inspection image a inspection image that shows the signal intensity of the third evaluation target data at each position inside the subject and does not show signal intensity outside the third evaluation target range. This makes it possible to appropriately suppress the appearance of geometric echoes in flaw detection images, thereby further improving the accuracy of distinguishing between flaw echoes and geometric echoes regardless of the level of skill of the inspector.

[0140] When the full range display check box 477 is selected, echoes outside the range to be evaluated are also displayed in the 1D scope display image 1410, the 2D scope display image 1420, and the 3D scope display image 1430.

[0141] (2D scope display image 1420) The second D scope display image 1420 is a flaw detection image showing the echo height in the second flaw detection data, and is a flaw detection image in which the circumferential position of the test pipe 7 is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis.

[0142] (3D scope display image 1430) The 3D scope display image 1430 is a flaw detection image showing the echo height in the third flaw detection data, and is a flaw detection image in which the circumferential position of the test pipe 7 is taken on the horizontal axis and the wall thickness (depth) of the pipe 7 is taken on the vertical axis.

[0143] In the determination result display screen 400 according to the other embodiment, the circumferential positions of the piping 7, which is the subject, are aligned with one another in the 1D scope display image 1410, the 2D scope display image 1420, and the 3D scope display image 1430. That is, in the determination result display screen 400 according to the other embodiment, if the left and right positions on the determination result display screen 400 are the same, the circumferential positions of the piping 7 in each of the display images 1410, 1420, and 1430 will be the same. The reference position on the horizontal axis in each of the display images 1410, 1420, and 1430 is a position corresponding to a reference circumferential position measured by the encoder 13 when detecting flaws in the pipe 7, for example, and set as the reference circumferential position. 15, the reference position on the horizontal axis is the left end position of each of the display images 1410, 1420, and 1430. The left end position of each of the display images 1410, 1420, and 1430 corresponds to the circumferential position of any one of the flaw detectors 11 at the start of ultrasonic flaw detection (at the start of movement of the flaw detector 11 by the movement device 56).

[0144] In FIG. 15, the horizontal axis in each display image 1410, 1420, 1430 represents the circumferential position of the pipe 7, i.e., the measured distance measured by the encoder 13, but it may also be represented as the circumferential angular position of the pipe 7, as in the embodiment described above.

[0145] (1st S-scope image 1411) The first S-scope display image 1411 is a flaw detection image showing the echo height in the first flaw detection data. The surface area first S-scope display image 1411 is a display image in which a flaw detection image 411a showing the echo height for a certain cross section along the pipe axis direction (axis line AXc direction) of the pipe 7, a pipe cross section 411b showing the cross section of the pipe 7 and the groove shape of the welded part 8, and a frame 411c showing the evaluation target range are superimposed.

[0146] (Second S-scope image 1421) The second S-scope display image 1421 is a flaw detection image showing the echo height in the second flaw detection data, and is a display image in which a flaw detection image showing the echo height for a cross section along the pipe axis direction (axis AXc direction) of the piping 7, a pipe cross-sectional view showing the cross section of the piping 7 and the groove shape of the welded portion 8, and a frame showing the range to be evaluated are superimposed.

[0147] (3rd S-scope image 1431) The third S-scope display image 1431 is a flaw detection image showing the echo height in the third flaw detection data, and is a display image in which a flaw detection image showing the echo height for a cross section along the pipe axis direction (axis AXc direction) of the piping 7, a pipe cross-sectional view showing the cross section of the piping 7 and the groove shape of the welded portion 8, and a frame showing the range to be evaluated are superimposed.

[0148] (1st to 3rd beam images 1412 to 1432) The first beam image 1412 is a diagram showing a beam image of a focal law for the first flaw detection data. The second beam image 1422 is a diagram showing a beam image of a focal law for the second flaw detection data. The third beam image 1432 is a diagram showing a beam image of a focal law for the third flaw detection data.

[0149] That is, in the display command generation step S45 of another embodiment, a command for displaying a first flaw detection image indicating the signal strength of the first flaw detection data read in the first reading step described above, a second flaw detection image indicating the signal strength of the second flaw detection data read in the second reading step described above, and a third flaw detection image indicating the signal strength of the third flaw detection data read in the third reading step described above on one display screen (judgment result display screen 400) on the display device 5 is generated by referring to the distance information obtained from the encoder 13 and information regarding the difference in the circumferential positions of the two flaw detection probes 11. Here, the first flaw detection image is, for example, a first D scope display image 1410, the second flaw detection image is, for example, a second D scope display image 1420, and the third flaw detection image is, for example, a third D scope display image 1430.

[0150] In another embodiment of the judgment result display screen 400, if the left and right positions on the judgment result display screen 400 are the same, in order to ensure that the circumferential position of the piping 7 in each display image 1410, 1420, 1430 is the same, in the display command generation step S45, the display command generation unit 22 corrects the positional relationship of the display position with respect to the circumferential position of the piping 7 in each display image 1410, 1420, 1430 based on the data measured by the encoder 13 read in the flaw detection data reading step S31 and information regarding the difference in the circumferential positions of the two flaw detectors 11.

[0151] In other words, if each display image 1410, 1420, 1430 on the judgment result display screen 400 is simply corrected based on the data measured by the encoder 13, the display position on the judgment result display screen 400 will be shifted left and right in Figure 15 by the difference in the circumferential positions of the two flaw detectors 11 between the first D scope display image 1410 based on the first flaw detection data acquired by one of the two flaw detectors 11, and the second D scope display image 1420 and the third D scope display image 1430 based on the second flaw detection data and the third flaw detection data acquired by the other of the two flaw detectors 11. In order to eliminate this deviation, in the display command generating step S45 according to another embodiment, the positional relationship of the display positions is corrected based on information regarding the difference in the circumferential positions of the two flaw detectors 11. As a result, even if there is a difference in the positions of the two flaw detectors 11 in the extension direction of the welded portion 8, the deviation in the display positions of the first flaw detector image, the second flaw detector image, and the third flaw detector image can be appropriately corrected.

[0152] According to the ultrasonic inspection data processing method and ultrasonic inspection data processing program of the other embodiment, the first inspection image (1D scope display image 1410), the second inspection image (2D scope display image 1420), and the third inspection image (3D scope display image 1430) are displayed on the display device 5 as one display screen (judgment result display screen 400), which makes it easy to compare the first inspection image, the second inspection image, and the third inspection image, and makes it easy to check the results of inspection at different distances from the welded part 8. This makes it possible to improve the accuracy of judgment on the condition of the test object based on the results of ultrasonic inspection, regardless of the skill of the inspector.

[0153] (Cross-section image 1450) The cross-section display image 1450 is a flaw detection image showing the echo height when viewed along the pipe axis direction (axis line AXc direction) of the pipe 7, and shows only the echo height within the evaluation target range. That is, the cross-section display image 450 does not show echoes outside the evaluation target range that would appear if the evaluation target range was not set.

[0154] That is, the display command generating step S45 in another embodiment is a step of generating a command to cause the display device 5 to display the cross-sectional display image 1450, which is a single flaw detection image generated based on the signal intensity of the first flaw detection data read in the first reading step described above, the signal intensity of the second flaw detection data read in the second reading step described above, and the signal intensity of the third flaw detection data read in the third reading step described above. This allows a flaw detection image of a relatively wide detection range to be displayed as a single flaw detection image using the first flaw detection data, second flaw detection data, and third flaw detection data obtained by detecting flaws at different positions, making it easier to understand the location of flaws in the specimen compared to when the flaw detection image using the first flaw detection data, the second flaw detection data, and the third flaw detection data are separate.

[0155] In the cross-sectional display image 1450, the echo height image obtained from the first flaw detection data, the echo height image obtained from the second flaw detection data, and the echo height image obtained from the third flaw detection data are matched so that there is no deviation in their circumferential positions in the piping 7 based on the distance information obtained from the encoder 13 and information regarding the difference in the circumferential positions of the two flaw detection probes 11.

[0156] That is, in the display command generation step S45 of another embodiment, a command for displaying on the display device 5 a cross-sectional display image 1450, which is a single flaw detection image generated based on the signal intensity of the first flaw detection data read in the first reading step described above, the signal intensity of the second flaw detection data read in the second reading step described above, and the signal intensity of the second flaw detection data read in the second reading step described above, is generated by referring to the distance information obtained from the encoder 13 and information regarding the difference in the circumferential positions of the two flaw detection probes 11. Furthermore, if the cross-sectional display image 1450 is simply corrected based on the data measured by the encoder 13, the display position in the cross-sectional display image 1450 will be shifted in the circumferential direction of the cross-sectional display image 1450 by the difference in the circumferential positions of the two flaw detectors 11 between the echo height image obtained from the first flaw detector data acquired by one of the two flaw detectors 11 and the echo height image obtained from the second flaw detector data and the third flaw detector data acquired by the other of the two flaw detectors 11. In order to eliminate this deviation, in the display command generating step S45 according to another embodiment, the positional relationship of the display positions is corrected based on information regarding the difference in the circumferential positions of the two flaw detectors 11. This makes it possible to appropriately correct the misalignment of the display positions of the display content based on the first flaw detection data, the display content based on the second flaw detection data, and the display content based on the third flaw detection data, even if there is a difference in the positions of the two flaw detection probes 11 in the extension direction of the weld 8.

[0157] (Evaluation step S7) In evaluation step S7 according to another embodiment, as in evaluation step S7 according to one embodiment, the inspector can evaluate the presence or absence of flaws within the evaluation range based on the flaw detection image, information about the flaws, and the pass / fail judgment display on the judgment result display screen 400 displayed on the display device 5.

[0158] (Regarding the moving device 56) FIG. 16 is a schematic diagram of a portion of an ultrasonic flaw detector 10 according to another embodiment attached to a pipe 7 as a test object, viewed from the radial outside of the pipe 7. As shown in FIG. 14 and FIG. 16, the ultrasonic flaw detector 10 according to another embodiment includes, for example, two flaw detectors 11. One of the two flaw detectors 11 is a first flaw detector 11A that can be arranged on the surface of the pipe 7 on one side in the axial line AXc direction from the welded portion 8 at a first distance Y1 from the welded portion 8, which is a butt welded portion. The other of the two flaw detectors 11 is a second flaw detector 11B that can be arranged on the surface of the pipe 7 on the one side at a second distance Y2 different from the first distance Y1 from the welded portion 8, and a third flaw detector 11C that can be arranged on the surface of the pipe 7 on the one side at a third distance Y3 different from the first distance Y1 and the second distance Y2 from the welded portion 8.

[0159] The ultrasonic flaw detector 10 according to another embodiment includes a holder 57 that holds the first flaw detector 11A and the second flaw detector 11B (or the third flaw detector 11C) while maintaining their relative positional relationship. An ultrasonic flaw detection device 10 according to another embodiment includes a moving device 56 configured to move the first flaw detector 11A and the second flaw detector 11B (or the third flaw detector 11C) held in a holding portion 57 in the extension direction of the welded portion 8, and an encoder 13 as an acquisition device for acquiring information regarding the movement distance in the extension direction. It should be noted that the holding unit 57 is included in the moving device 56 .

[0160] According to the ultrasonic flaw detector 10 of the other embodiment, flaw detection can be performed simultaneously using the first flaw detector 11A and the second flaw detector 11B. This can reduce the number of flaw detections, thereby saving time and effort required for flaw detection.

[0161] In the ultrasonic flaw detector 10 shown in Figures 14 and 16, the holding portion 57 is configured to hold the first flaw detector 11A and the second flaw detector 11B (or the third flaw detector 11C) in a state where they are shifted in the extension direction of the welded portion 8. This makes it possible to position the two flaw detectors 11 at positions a desired distance away from the welded portion 8, even if the two flaw detectors 11 would interfere with each other if they were positioned in a direction perpendicular to the extension direction of the welded portion 8 (the direction of the axis AXc).

[0162] 14 and 16, the holder 57 has a changer 58 for changing the relative position between at least one of the two flaw detectors 11 and the holder 57 in a direction (axis AXc direction) perpendicular to the extension direction of the welded portion 8. For example, in the ultrasonic flaw detector 10 shown in FIG. The changeable portion 58 is configured to hold the flaw detector 11 so that the position of the flaw detector 11 in the direction of the axis AXc relative to the changeable portion 58 can be changed. This makes it possible to appropriately set the inspection range even if the thickness of the test object changes, for example.

[0163] The present disclosure is not limited to the above-described embodiments, and includes modifications to the above-described embodiments and appropriate combinations of these modifications.

[0164] The contents described in each of the above embodiments can be understood, for example, as follows. (1) An ultrasonic inspection data processing program according to at least one embodiment of the present disclosure is an ultrasonic inspection data processing program for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a welded portion 8 of a test object (pipe 7). The ultrasonic inspection data processing program according to at least one embodiment of the present disclosure causes a calculation device (CPU2) to execute a flaw inspection data reading step S31 for reading flaw inspection data stored in an external device, and a display command generating step S45 for generating a command for displaying an inspection image showing a signal intensity at each position inside the test object (pipe 7) on the display device 5 based on the flaw inspection data read in the flaw inspection data reading step S31. The inspection data includes first inspection data acquired at a first position P1 separated by a first distance Y1 in one direction intersecting with the extension direction of the welded portion 8, and second inspection data acquired at a second position P2 separated by a second distance Y2 different from the first distance Y1 in the one direction. The flaw detection data reading step S31 includes a first reading step of reading the first flaw detection data and a second reading step of reading the second flaw detection data. In the display command generating step S45, a command is generated for displaying, on one display screen (determination result display screen 400) on the display device 5, a first flaw detection image (first D scope display image 1410) showing the signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image (second D scope display image 1420) showing the signal intensity of the second flaw detection data read in the second reading step.

[0165] According to the program (1) above, the first inspection image (1D scope display image 1410) and the second inspection image (2D scope display image 1420) are displayed on the display device 5 as one display screen (judgment result display screen 400), making it easy to compare the first inspection image (1D scope display image 1410) and the second inspection image (2D scope display image 1420) and to easily check the results of inspection at different distances from the welded portion 8. This improves the accuracy of judgment on the condition of the test object based on the results of ultrasonic inspection, regardless of the skill of the inspector.

[0166] (2) In some embodiments, in the program of (1) above, the calculation device (CPU 2) may execute an evaluation target range setting step S39 for setting an evaluation target range inside the test object (pipe 7). In the display command generating step S45, a command may be generated to extract evaluation target data corresponding to a region inside the evaluation target range from the flaw detection data read in the flaw detection data reading step S31, and to display on the display device 5 flaw detection images (first D scope display image 1410, second D scope display image 1420) showing the signal intensity of the evaluation target data at each position inside the test object (pipe 7) and not showing the signal intensity outside the evaluation target range.

[0167] According to the program (2) above, the evaluation range is appropriately set according to the shape of the test object (pipe 7), thereby making it possible to suppress the appearance of shape echoes in the flaw detection images (first D scope display image 1410, second D scope display image 1420). This makes it possible to improve the accuracy of distinguishing flaw echoes from shape echoes, regardless of the skill level of the inspector.

[0168] (3) In some embodiments, in the program of (2) above, in the evaluation target range setting step S39, a first evaluation target range may be set for the first flaw detection data, and a second evaluation target range may be set for the second flaw detection data. In the display command generating step S45, a command may be generated to extract first evaluation target data corresponding to a region within the first evaluation target range from the first flaw detection data read in the flaw detection data reading step S31, and to display, on the display device 5, a flaw detection image showing the signal intensity of the first evaluation target data at each position inside the specimen (pipe 7) and not showing the signal intensity outside the first evaluation target range, as a first flaw detection image (first D-scope display image 1410). In the display command generation step S45, second evaluation target data corresponding to an area within the second evaluation target range is extracted from the second inspection data read in the inspection data reading step S31, and a command is generated to cause the display device 5 to display a inspection image that shows the signal intensity of the second evaluation target data at each position inside the test object (piping 7) and does not show signal intensity outside the second evaluation target range as a second inspection image (second D scope display image 1420).

[0169] According to the program of (3) above, even if the inspection ranges differ between the first inspection data acquired at the first position P1 and the second inspection data acquired at the second position P2, which are different distances from the welded portion 8, it is possible to set an evaluation target range suitable for each inspection range. This makes it possible to appropriately suppress the appearance of shape echoes in the inspection images (first D scope display image 1410, second D scope display image 1420), thereby further improving the accuracy of distinguishing between flaw echoes and shape echoes regardless of the skill level of the inspector.

[0170] (4) In some embodiments, in any of the programs (1) to (3) above, in the flaw detection data reading step S31, information on the difference in position between the first flaw detection element 11A for obtaining the first flaw detection data and the second flaw detection element 11B for obtaining the second flaw detection data in the extension direction of the welded portion 8 when performing ultrasonic flaw detection may be read from an external device. In the display command generating step S45, the positional relationship between the display positions of the first flaw detection image (first D scope display image 1410) and the second flaw detection image (second D scope display image 1420) on one display screen (determination result display screen 400) may be corrected based on the information on the difference in position.

[0171] According to the program (4) above, when generating an instruction to display the first flaw detection image (first D scope display image 1410) and the second flaw detection image (second D scope display image 1420) on the display device 5 as a single display screen (judgment result display screen 400), even if there is a difference in the position in the extension direction of the weld 8 between the first flaw detection element 11A and the second flaw detection element 11B, the deviation in the display position between the first flaw detection image (first D scope display image 1410) and the second flaw detection image (second D scope display image 1420) can be appropriately corrected.

[0172] (5) In some embodiments, in any of the programs (1) to (4) above, the display command generation step S45 may generate a command to cause the display device 5 to display one flaw detection image (cross-sectional display image 1450) generated based on the signal intensity of the first flaw detection data read in the first reading step and the signal intensity of the second flaw detection data read in the second reading step.

[0173] According to the program (5) above, a flaw detection image of a relatively wide detection range can be displayed as a single flaw detection image (cross-sectional display image 1450) using the first flaw detection data and the second flaw detection data obtained by detecting flaws at different positions. This makes it easier to understand the position of the flaw in the specimen (piping 7) compared to when the flaw detection image based on the first flaw detection data and the flaw detection image based on the second flaw detection data are separate.

[0174] (6) In some embodiments, in the program of (5) above, in the flaw detection data reading step S31, information on the difference in position between the first flaw detection element 11A for obtaining the first flaw detection data and the second flaw detection element 11B for obtaining the second flaw detection data in the extension direction of the welded portion 8 when performing ultrasonic flaw detection may be read from an external device. In the display command generating step S45, a command for displaying on the display device 5 one flaw detection image (cross-sectional display image 1450) generated based on the signal intensity of the first flaw detection data read in the first reading step and the signal intensity of the second flaw detection data read in the second reading step may be generated with reference to the information on the difference in position.

[0175] According to the program (6) above, when generating a command to display one flaw detection image (cross-sectional display image 1450) based on the first flaw detection data and the second flaw detection data on the display device 5, even if there is a difference in the position of the first flaw detection probe 11A and the second flaw detection probe 11B in the extension direction of the weld 8, the deviation in the display position between the display content based on the first flaw detection data and the display content based on the second flaw detection data can be appropriately corrected.

[0176] (7) In some embodiments, in any of the programs (1) to (6) above, the welded portion 8 may be a butt welded portion connecting two members. The flaw detection data may include the first flaw detection data and the second flaw detection data acquired while simultaneously moving the first flaw detection element 11A for obtaining the first flaw detection data and the second flaw detection element 11B for obtaining the second flaw detection data on the surface of one of the two members in the extension direction of the welded portion 8.

[0177] According to the program (7) above, it is possible to improve the accuracy of judging the state of the test object (pipe 7) regarding the butt weld and its surroundings.

[0178] (8) An ultrasonic inspection data processing method according to at least one embodiment of the present disclosure is an ultrasonic inspection data processing method for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a welded portion 8 of a test object (pipe 7). The ultrasonic inspection data processing method according to at least one embodiment of the present disclosure includes a flaw inspection data reading step S31 for reading flaw inspection data stored in an external device, and a display command generating step S45 for generating a command for displaying an inspection image showing a signal intensity at each position inside the test object (pipe 7) on the display device 5 based on the flaw inspection data read in the flaw inspection data reading step S31. The inspection data includes first inspection data acquired at a first position P1 separated by a first distance Y1 in one direction intersecting with the extension direction of the welded portion 8, and second inspection data acquired at a second position P2 separated by a second distance Y2 different from the first distance Y1 in the one direction. The flaw detection data reading step S31 includes a first reading step of reading the first flaw detection data and a second reading step of reading the second flaw detection data. In the display command generating step S45, a command is generated for displaying, on one display screen (determination result display screen 400) on the display device 5, a first flaw detection image (first D scope display image 1410) showing the signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image (second D scope display image 1420) showing the signal intensity of the second flaw detection data read in the second reading step.

[0179] According to the method (8) above, the first inspection image (1D scope display image 1410) and the second inspection image (2D scope display image 1420) are displayed on the display device 5 as one display screen (judgment result display screen 400), making it easy to compare the first inspection image (1D scope display image 1410) and the second inspection image (2D scope display image 1420) and to easily check the results of inspection at different distances from the welded portion 8. This improves the accuracy of judgment on the condition of the test object based on the results of ultrasonic inspection, regardless of the skill of the inspector.

[0180] (9) The ultrasonic inspection device 10 according to at least one embodiment of the present disclosure is an ultrasonic inspection device for ultrasonically inspecting a test object (pipe 7) having a butt weld (weld 8) connecting two components. An ultrasonic flaw detection device 10 according to at least one embodiment of the present disclosure comprises a first flaw detector 11A that can be positioned on the surface of one of two components at a first distance Y1 away from the butt weld (weld 8), a second flaw detector 11B that can be positioned on the surface of one of the two components at a second distance Y2 different from the first distance Y1 from the butt weld (weld 8), a holding unit 57 that holds the first flaw detector 11A and the second flaw detector 11B while maintaining their relative positional relationship, a moving device 56 that is configured to move the first flaw detector 11A and the second flaw detector 11B held by the holding unit 57 in the extension direction of the butt weld (weld 8), and an acquisition device (encoder 13) for acquiring information regarding the movement distance in the extension direction.

[0181] According to the above configuration (9), flaw detection can be performed simultaneously on the surface of one of the two members by the first flaw detector 11A and the second flaw detector 11B, which are at different distances from the butt weld (welded portion 8). This can reduce the number of flaw detections, and can save time and effort required for flaw detection.

[0182] (10) In some embodiments, in the configuration of (9) above, the holding portion 57 may hold the first flaw detector 11A and the second flaw detector 11B in a state where they are shifted in the extending direction.

[0183] According to the above configuration (10), even if the first flaw detector 11A and the second flaw detector 11B would interfere with each other when they are arranged in a direction perpendicular to the extension direction of the butt weld (weld 8), the first flaw detector 11A and the second flaw detector 11B can be arranged at a position a desired distance away from the butt weld (weld 8).

[0184] (11) In some embodiments, in the configuration of (9) or (10) above, the holding portion 57 may have a change portion 58 for changing the relative position between at least one of the first flaw detector 11A and the second flaw detector 11B and the holding portion 57 in a direction perpendicular to the extension direction.

[0185] According to the above configuration (11), even if the thickness of the test object (pipe 7) or the like changes, the inspection range can be appropriately set. [Explanation of symbols]

[0186] 2 Computing unit (CPU) 5 Display device 7 Piping 8 Welding 10 Ultrasonic flaw detection equipment 11 Flaw detector 11A 1st flaw detector 11B 2nd flaw detector 13 Encoders 56 Mobile Device 57 Holding part 58 Changes 400 Judgment result display screen 1410 1st D scope display image 1420 2D scope display image 1450 cross-sectional image

Claims

1. An ultrasonic inspection data processing program for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a weld of a test object, A flaw detection data reading step of reading flaw detection data stored in an external device; a display command generating step of generating a command for displaying, on a display device, a flaw detection image showing a signal intensity at each position inside the subject based on the flaw detection data read in the flaw detection data reading step; and causing a computing device to execute the following: The inspection data includes first inspection data acquired at a first position a first distance away in one direction intersecting with the extension direction of the welded portion, and second inspection data acquired at a second position a second distance away in the one direction that is different from the first distance, The flaw detection data reading step includes: A first reading step of reading the first flaw detection data; A second reading step of reading the second flaw detection data; Including, In the display command generating step, a command is generated to display, on one display screen of the display device, a first flaw detection image showing a signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image showing a signal intensity of the second flaw detection data read in the second reading step. Ultrasonic inspection data processing program.

2. an evaluation target range setting step of setting an evaluation target range inside the subject; causing the arithmetic unit to execute the In the display command generation step, evaluation target data corresponding to a region within the evaluation target range is extracted from the flaw detection data read in the flaw detection data reading step, and a command is generated to display on a display device a flaw detection image showing a signal intensity of the evaluation target data at each position inside the subject and not showing a signal intensity outside the evaluation target range.

2. The ultrasonic inspection data processing program according to claim 1.

3. In the evaluation range setting step, a first evaluation range can be set for the first flaw detection data, and a second evaluation range can be set for the second flaw detection data, In the display command generating step, extracting first evaluation target data corresponding to a region within the first evaluation target range from the first inspection data read in the inspection data reading step, and generating a command to display, on the display device as the first inspection image, a flaw inspection image that indicates a signal intensity of the first evaluation target data at each position inside the subject and does not indicate a signal intensity outside the first evaluation target range; extracting second evaluation target data corresponding to a region within the second evaluation target range from the second inspection data read in the inspection data reading step, and generating a command to cause the display device to display, as the second inspection image, a flaw inspection image that indicates a signal intensity of the second evaluation target data at each position inside the subject and does not indicate a signal intensity outside the second evaluation target range.

3. The ultrasonic inspection data processing program according to claim 2.

4. In the flaw detection data reading step, information regarding a difference in position between a first flaw detector for obtaining the first flaw detection data and a second flaw detector for obtaining the second flaw detection data in the extending direction of the weld is read from the external device when performing the ultrasonic flaw detection; In the display command generating step, a positional relationship between display positions of the first inspection image and the second inspection image on the one display screen is corrected based on information regarding the position difference.

3. The ultrasonic inspection data processing program according to claim 1 or 2.

5. In the display command generating step, a command is generated to display, on the display device, one flaw detection image generated based on a signal intensity of the first flaw detection data read in the first reading step and a signal intensity of the second flaw detection data read in the second reading step.

3. The ultrasonic inspection data processing program according to claim 1 or 2.

6. In the flaw detection data reading step, information regarding a difference in position between a first flaw detector for obtaining the first flaw detection data and a second flaw detector for obtaining the second flaw detection data in the extending direction of the weld is read from the external device when performing the ultrasonic flaw detection; In the display command generating step, a command for displaying on the display device one inspection image generated based on the signal intensity of the first inspection data read in the first reading step and the signal intensity of the second inspection data read in the second reading step is generated by referring to information related to the position difference.

6. The ultrasonic inspection data processing program according to claim 5.

7. The weld is a butt weld that connects two members, The inspection data includes the first inspection data and the second inspection data acquired while simultaneously moving a first inspection probe for obtaining the first inspection data and a second inspection probe for obtaining the second inspection data on a surface of one of the two members in the extending direction of the weld, 3. The ultrasonic inspection data processing program according to claim 1 or 2.

8. 1. An ultrasonic inspection data processing method for acquiring and processing inspection data previously obtained by performing ultrasonic inspection on a weld of a test object, comprising: A flaw detection data reading step of reading flaw detection data stored in an external device; a display command generating step of generating a command for displaying, on a display device, a flaw detection image showing a signal intensity at each position inside the subject based on the flaw detection data read in the flaw detection data reading step; Equipped with The inspection data includes first inspection data acquired at a first position a first distance away in one direction intersecting with the extension direction of the welded portion, and second inspection data acquired at a second position a second distance away in the one direction that is different from the first distance, The flaw detection data reading step includes: A first reading step of reading the first flaw detection data; A second reading step of reading the second flaw detection data; Including, In the display command generating step, a command is generated to display, on one display screen of the display device, a first flaw detection image showing a signal intensity of the first flaw detection data read in the first reading step and a second flaw detection image showing a signal intensity of the second flaw detection data read in the second reading step. Ultrasonic inspection data processing method.

9. An ultrasonic inspection apparatus for ultrasonically inspecting an object having a butt weld connecting two members, comprising: a first flaw detector positionable on a surface of one of the two members at a first distance from the butt weld; a second flaw detector that can be positioned on a surface of one of the two members at a second distance from the butt weld, the second distance being different from the first distance; a holding section that holds the first flaw detector and the second flaw detector while maintaining a relative positional relationship between the first flaw detector and the second flaw detector; a moving device configured to be able to move the first flaw detector and the second flaw detector held by the holding portion in an extension direction of the butt weld portion; an acquisition device for acquiring information regarding a moving distance in the extension direction; Equipped with Ultrasonic flaw detection equipment.

10. The holding portion holds the first flaw detector and the second flaw detector in a state where they are shifted in the extension direction. The ultrasonic flaw detector according to claim 9.

11. The holding portion includes a change portion for changing a relative position between the holding portion and at least one of the first flaw detector and the second flaw detector in a direction perpendicular to the extension direction; having The ultrasonic flaw detector according to claim 9 or 10.

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