JP7260457B2 - Ultrasonic flaw detection system - Google Patents

Description

The present invention relates to ultrasonic flaw detection systems.

Patent document 1 has means for acquiring an information source related to a measurement object, determines acceptance/failure criteria corresponding to the measurement object identified from the acquired information source, and performs ultrasonic flaw detection for defects existing inside the measurement object. configuration is described.

JP 2007-271375 A

In order to obtain accurate measurement results in ultrasonic flaw detection, it is necessary to adjust the conditions for transmitting and receiving ultrasonic waves according to the specifications (material and thickness) of the object to be measured. For example, if the thickness or material of the object to be measured is not uniform depending on the measurement location, it is necessary to change the measurement conditions according to the measurement location.

The technique described in Patent Document 1 does not take into account changes in the measurement conditions according to changes in the specifications of the object to be measured. However, there is a problem in that it is necessary to change the setting of the flaw detector while referring to the measurement condition information.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an ultrasonic flaw detection system capable of coping with changes in specifications of an object to be measured.

The ultrasonic flaw detection system according to the invention of claim 1 includes a probe that measures the state of the object to be measured by ultrasonic flaw detection in a state facing the object to be measured, and information indicating the existence of the probe provided in the probe. A first marker recorded in an optically readable state is provided in an area where the specification indicating material and thickness of the measurement object is continuously the same, and indicates the range of the provided area and the provided area. a second marker recording information on specifications of the obtained area in an optically readable state; an imaging unit that captures an image of the measurement target; and the first markers detected from the image data acquired by the imaging unit. a control unit that sets conditions for ultrasonic flaw detection by the probe based on information on specifications of the area indicated by one of the second markers selected based on the positional relationship with the second markers.

According to the first aspect of the invention, the conditions for ultrasonic flaw detection are set based on specifications indicating the material and thickness of the object to be measured, which are extracted from the second marker appearing in the image data obtained by imaging the object to be measured.

ADVANTAGE OF THE INVENTION This invention has the effect that it can obtain the ultrasonic flaw-detection system which can respond to the change of the specification of a measuring object.

1 is a block diagram showing the configuration of an ultrasonic flaw detection system according to a first embodiment of the present invention; FIG. 1 is an explanatory diagram showing one mode of ultrasonic flaw detection by the ultrasonic flaw detection system according to the first embodiment of the present invention; FIG. 4 is a flow chart showing an example of processing in the arithmetic unit of the ultrasonic flaw detection system according to the first embodiment of the present invention; FIG. 4 is an explanatory diagram showing a method of selecting a marker for measurement; 8A is an explanatory diagram showing a case where an extension line of an end of a measurement target marker is used as an area boundary, and FIG. 8B is an explanatory diagram showing a case where area range information is recorded in the measurement target marker. FIG. 8 is a flow chart showing an example of processing in the arithmetic device of the ultrasonic flaw detection system according to the second embodiment of the present invention; It is the flowchart which showed an example of the process in the arithmetic unit of the ultrasonic test system which concerns on 3rd Embodiment of this invention. It is the flowchart which showed an example of the process in the arithmetic unit of the ultrasonic test system which concerns on 4th Embodiment of this invention.

An example of an embodiment of the present invention will be described in detail below with reference to the drawings.

[First embodiment]
FIG. 1 shows an ultrasonic flaw detection system 10 according to the first embodiment. The ultrasonic flaw detection system 10 according to the present embodiment includes a storage device 18 that stores data necessary for calculation of the calculation device 14 and calculation results by the calculation device 14, a camera 20 that photographs the measurement target, and a surface of the measurement target. An ultrasonic probe 24 that performs ultrasonic flaw detection on a measurement target in a mounted state, an input device 12 for inputting image data acquired by the camera 20 and measurement data by the ultrasonic probe 24, and input from the input device 12 Arithmetic device 14 composed of a computer or the like for estimating the state of the measurement object including the defect of the measurement object by arithmetic processing based on the input data and the data stored in the storage device 18, and the measurement estimated by the arithmetic device 14 and a display device 16 configured by a CRT, LCD, or the like for displaying the status of the object. The input device 12 includes a device such as a mouse, a keyboard, or a touch panel, and in addition to image data acquired by the camera 20 and measurement data by the ultrasonic probe 24, information is input to the arithmetic device 14 by the operator's operation of the device. It is configured to be able to Although one camera 20 may be used, a plurality of cameras 20 may be used when the object to be measured is wide.

The ultrasonic probe 24 has a generally flat rectangular shape, and when it is in contact with the surface of the object to be measured, an ultrasonic pulse signal with a frequency of about 0.1 MHz to 25 MHz (hereinafter referred to as "ultrasonic pulse ) is propagated on and inside the object to be measured, and the reflected signal, reflected intensity and propagation time of the ultrasonic pulse are detected. If there is some defect inside the object to be measured, the defect has acoustic discontinuity. and propagation time differences. In this embodiment, the arithmetic device 14 estimates the internal state of the object to be measured, including defects, based on the reflected signal, the reflected intensity, and the propagation time detected by the ultrasonic probe 24 . The ultrasonic probe 24 may be moved by an operator on the surface of the measurement object, or may be moved by actuators.

FIG. 2 is an explanatory diagram showing one mode of ultrasonic flaw detection by the ultrasonic flaw detection system 10 according to the present embodiment. As shown in FIG. 2, the measurement target 50 has a first area 52, a second area 54, a third area 56 and a fourth area 58. As shown in FIG. The first area 52 is of thickness d ₁ and is made of material A, the second area 54 is of thickness d ₂ and is of material A, the third area 56 is of thickness d ₃ and is made of material B, and the third area 56 is of thickness d 2 and is made of material A. The 4 area 58 is made of material B with a thickness of _d4 . Henceforth, in this embodiment, the area|region in which the specifications, such as a material and thickness, are continuously the same in the measurement object 50 is defined as an "area."

An ultrasonic probe 24 is placed on the surface of the first area 52 . In the example shown in FIG. 2, the ultrasonic probe 24 is moved from the first area 52 to the second area 54, the third area 56 and the fourth area 58, and the first area 52, the second area 54 and the third area 56 and the fourth area 58 are ultrasonically inspected. A probe marker 24M is provided on the upper surface of the ultrasonic probe 24 to indicate that the ultrasonic probe 24 exists. The probe marker 24M records information indicating the presence of the ultrasonic probe 24 in an optically readable format such as a one-dimensional code such as a bar code or a two-dimensional code such as a QR code (registered trademark). However, information regarding the specifications of the ultrasonic probe 24 may also be recorded.

The first area 52 has a measurement target marker 52M, the second area 54 has a measurement target marker 54M, the third area 56 has a measurement target marker 56M, and the fourth area 58 has a marker 56M. Measurement target markers 58M are respectively installed on the surface. As described above, the measurement target marker 52M exists in the first area 52, and the first area 52 is made of the material A with the thickness _d1 , and the measurement target marker 54M exists in the second area 54, and the second area 54 is made of material A with thickness d ₂ , measurement target marker 56M is present in third area 56 and third area 56 is made of material B with thickness d ₃ , and measurement target marker 58M is made of material B with thickness d 3 . Information is recorded that exists in each area and indicates that the fourth area 58 is composed of material B with a thickness of _d4 . One or more measurement target markers 52M, 54M, 56M, and 58M are installed for each area.

Each of the measurement target markers 52M, 54M, 56M, 58M and the aforementioned probe marker 24M is optically readable as a one-dimensional code such as a barcode or a two-dimensional code such as a QR code (registered trademark). Information is recorded in a format. Each of the measurement target markers 52M, 54M, 56M, 58M and the probe marker 24M is photographed by the camera 20 provided above the measurement target 50 in FIG. Then, the arithmetic unit 14 of the ultrasonic flaw detection system 10 acquires information recorded in each of the measurement target markers 52M, 54M, 56M, 58M and the probe marker 24M from the image data acquired by the camera 20. FIG. Alternatively, the camera 20 may be provided on the ultrasonic probe 24, and the information recorded on the measurement target markers 52M, 54M, 56M, and 58M may be acquired by the camera 20 provided on the ultrasonic probe 24. FIG.

FIG. 3 is a flowchart showing an example of processing in the arithmetic unit 14 of the ultrasonic flaw detection system 10 according to this embodiment. In step 300, the probe marker 24M and the measurement target markers 52M, 54M, 56M and 58M present on the surface of the measurement target 50 are photographed. The measurement target markers 52M, 54M, 56M, and 58M photographed in step 300 must include the measurement target markers 52M, 54M, 56M, and 58M selected in step 302, which will be described later. If the lens of the camera 20 has a wide angle of view and the camera 20 can acquire high-quality image data, even if all the measurement target markers 52M, 54M, 56M, and 58M existing on the measurement target 50 are photographed, good. Alternatively, all of the measurement target markers 52M, 54M, 56M, and 58M may be photographed by changing the angle of the camera 20 and acquiring a plurality of image data.

In step 302, the measurement target markers 52M, 54M, 56M, and 58M whose information is to be read are selected. The measurement target markers 52M, 54M, 56M, and 58M for reading information are, for example, the measurement target marker 52M, which exists closest to the ultrasonic probe 24 in the traveling direction of the ultrasonic probe 24, as shown in FIG. Choose from 54M, 56M, or 58M. In FIG. 4, when the ultrasonic probe 24 moves from the first area 52 to the second area 54, the measurement target marker 54M existing in the traveling direction of the ultrasonic probe 24 is selected as the measurement target marker for reading information. . The traveling direction of the ultrasonic probe 24 is estimated from changes in the positional relationship between the reference marker 50R and the probe marker 24M on the image obtained by imaging the measurement target 50. FIG. As an example, the reference marker 50R is a measurement target marker from which the ultrasonic probe 24 obtained information last time. Alternatively, one of the measurement target markers 52M, 54M, 56M, and 58M existing in the same area as the probe marker 24M may be selected.

In step 302, when selecting the measurement target markers 52M, 54M, 56M, and 58M from which information is to be read, it is necessary to detect the boundary positions of the areas. FIG. 5 is an explanatory diagram showing a method of detecting the boundary position of areas. In FIG. 5A, the extension lines of the ends of the measurement target markers 52M, 54M, 56M, and 58M are used as the boundary of the area, and FIG. Each shows a case in which area range information is recorded.

As shown in FIG. 5A, the first area 52 is provided with measurement target markers 52M1 and 52M2, and the second area 54 is provided with measurement target markers 54M1 and 54M2. The computing device 14 detects, for example, the extension lines of the ends of the measurement target markers 52M1 and 52M2 as the boundaries 60, 62, 64 and 66 of the first area 52. FIG.

As shown in FIG. 5B, the first area 52 is provided with a measurement target marker 52M1, and the second area 54 is provided with a measurement target marker 54M1. For example, in the measurement target marker 52M1 provided in the first area 52, a line segment parallel to the predetermined end existing at a position 50 mm away from the predetermined end of the measurement target marker 52M1 is drawn in the first area. Information for a boundary 62 between 52 and the second area 54 is stored. The computing device 14 detects the boundary 62 based on the information recorded in the measurement target marker 52M1.

At step 304, the corresponding area information is read from one of the measurement target markers 52M, 54M, 56M, and 58M selected at step 302. FIG. In this embodiment, the measurement target marker 52M is in the first area 52, the measurement target marker 54M is in the second area 54, the measurement target marker 56M is in the third area 56, and the measurement target marker 58M is in the fourth area. 58 is recorded in the form of a one-dimensional code such as a bar code as described above, or a two-dimensional code such as a QR code (registered trademark). , a one-dimensional code or a two-dimensional code, etc., is read from the image.

In step 306, it is determined whether or not the ultrasonic probe 24 exists within the area where the measurement target markers 52M, 54M, 56M, and 58M selected in step 302 exist. If the ultrasonic probe 24 is present in the area where the measurement target markers 52M, 54M, 56M, and 58M whose information has been read in step 306 exists, the procedure proceeds to step 308; 300.

In step 308, specification information indicating the thickness, material, etc. of the measurement object 50 is acquired from the measurement object markers 52M, 54M, 56M, and 58M. Since the specification information of the measurement target 50 is recorded in the form of a one-dimensional code such as a bar code as described above, or a two-dimensional code such as a QR code (registered trademark), the arithmetic unit 14 can Information recorded in the form of a code or two-dimensional code is read from the image.

At step 310, the specification information obtained at step 308 is displayed on the display device 16 such as a monitor. At the same time, the measurement conditions of the ultrasonic probe 24 are set according to the acquired specification information, and ultrasonic flaw detection is performed within the area.

In step 312, it is determined whether or not an instruction to end measurement has been issued from the input device 12, and if such an instruction has been issued, the process is terminated. If the end of measurement is not instructed in step 312 , the ultrasonic probe 24 is moved to another area, etc., and the procedure proceeds to step 300 . The end of measurement may be determined based on an input from the operator.

As described above, the ultrasonic flaw detection system 10 according to the present embodiment includes measurement target markers 52M, 54M, 56M, and 58M in which specifications such as the material and thickness of each area of the measurement target 50 are recorded. , and reading the information of the measurement target markers 52M, 54M, 56M, and 58M with the camera 20 or the like, it is possible to obtain an ultrasonic flaw detection system capable of coping with changes in the specifications of the measurement target.

[Second embodiment]
Next, a second embodiment will be described. The present embodiment differs from the first embodiment in that setting condition files of flaw detectors corresponding to the specifications of each area of the measurement object 50 are stored in advance in the storage device 18 or the like. In this embodiment, the arithmetic unit 14 selects areas corresponding to the measurement target markers 52M, 54M, 56M, and 58M from the information described in the measurement target markers 52M, 54M, 56M, and 58M selected in step 302 of FIG. Acquire the identification information of the setting condition file related to the specification of Then, the computing device 14 reads the setting condition file from the storage device 18 according to the acquired identification information, and sets the specifications of each area of the measurement object 50 according to the read setting information file.

Except for the above differences, the ultrasonic flaw detection system according to the present embodiment is the same as the ultrasonic flaw detection system 10 according to the first embodiment. , and detailed description is omitted.

FIG. 6 is a flow chart showing an example of processing in the arithmetic unit 14 of the ultrasonic flaw detection system according to this embodiment. Steps 300 to 306 and step 312 of FIG. 6 are the same as those of the first embodiment described above, so detailed description thereof will be omitted.

The steps 500 to 504 shown in FIG. 6 differ from the first embodiment in this embodiment. In step 500, the identification information of the setting condition file related to the specification of the corresponding area from the measurement target markers 52M, 54M, 56M, and 58M selected in step 302 is obtained. The identification information acquired in step 500 is recorded in the form of a one-dimensional code such as a barcode, or a two-dimensional code such as a QR code (registered trademark). The arithmetic unit 14 acquires the identification information by reading information recorded in a format such as a one-dimensional code or a two-dimensional code from the image.

At step 502, a setting condition file is obtained from the storage device 18 according to the obtained identification information. Then, in step 504, the measurement conditions of the ultrasonic probe 24 are set according to the acquired setting condition file, and ultrasonic flaw detection is performed within the area.

As described above, in the ultrasonic flaw detection system according to the present embodiment, the setting condition file related to the specification information of each area of the measurement target 50 is stored in the storage device 18 instead of the measurement target markers 52M, 54M, 56M, and 58M. Stored. A one-dimensional code such as a bar code or a two-dimensional code such as a QR code (registered trademark) provided on the measurement target markers 52M, 54M, 56M, and 58M for the information amount of the setting condition file related to the specification information of each area , etc., in this embodiment, only the identification information of the setting condition file is recorded in the one-dimensional code or two-dimensional code of the measurement target markers 52M, 54M, 56M, and 58M. The arithmetic device 14 reads the specification information of the area corresponding to the measurement target markers 52M, 54M, 56M, and 58M according to the identification information read from the one-dimensional code or the two-dimensional code of the measurement target markers 52M, 54M, 56M, and 58M. By reading the setting condition file from the storage device 18, it is possible to set the measurement conditions for ultrasonic flaw detection even when the amount of information in the setting condition file is large.

[Third embodiment]
Next, a third embodiment will be described. In this embodiment, in order to prevent erroneous determination of areas (particularly near boundaries), reference waveform data is stored in measurement target markers 52M, 54M, 56M, and 58M, and actual measured waveforms are compared with the reference waveform data. , the specification information recorded in the measurement target markers 52M, 54M, 56M, and 58M is acquired when both match.

Except for the above differences, the ultrasonic flaw detection system according to the present embodiment is the same as the ultrasonic flaw detection system 10 according to the first embodiment. , and detailed description is omitted.

FIG. 7 is a flowchart showing an example of processing in the arithmetic unit 14 of the ultrasonic flaw detection system according to this embodiment. Steps 300 to 306 and steps 308 to 312 in FIG. 7 are the same as in the first embodiment, so detailed descriptions thereof will be omitted.

Procedures in this embodiment that differ from the first embodiment are steps 600 to 604 shown in FIG. At step 600, the ultrasonic probe 24 is activated to acquire a measured waveform within the area.

In step 602, reference waveforms are acquired from the measurement target markers 52M, 54M, 56M, and 58M selected in step 302, and the acquired reference waveforms and the measured waveforms acquired in step 600 are compared.

At step 604, it is determined whether or not the match rate between the measured waveform and the reference waveform is equal to or greater than a predetermined specified value. The predetermined specified value is 70% as an example. If it is determined in step 604 that the matching rate is equal to or greater than the prescribed value, the procedure proceeds to step 308 . If it is determined in step 604 that the matching rate is less than the predetermined specified value, the procedure proceeds to step 302 .

As described above, the ultrasonic flaw detection system according to the present embodiment stores reference waveform data in the measurement target markers 52M, 54M, 56M, and 58M, compares the actual measurement waveform with the reference waveform data, If both match, the specification information recorded in the measurement target markers 52M, 54M, 56M, and 58M is acquired. As a result, erroneous determination of the area of the measurement object 50 can be avoided, and the measurement conditions for ultrasonic flaw detection can be appropriately set.

[Fourth embodiment]
Next, a fourth embodiment will be described. This embodiment is different from the first embodiment in that the next measurement is started after the setting change is completed to prevent erroneous measurement.

Except for the above differences, the ultrasonic flaw detection system according to the present embodiment is the same as the ultrasonic flaw detection system 10 according to the first embodiment. , and detailed description is omitted.

FIG. 8 is a flow chart showing an example of processing in the arithmetic unit 14 of the ultrasonic flaw detection system according to this embodiment. Steps 300 to 306 and step 312 in FIG. 8 are the same as those in the first embodiment described above, so a detailed description will be omitted. Also, since steps 500 to 504 are the same as in the second embodiment, detailed description thereof will be omitted.

Procedures in this embodiment that differ from those in the first and second embodiments are steps 700 to 702 shown in FIG. At step 700, it is determined whether or not the change of the measurement conditions of the ultrasonic probe 24 has been completed based on the setting condition file read from the storage device 18. FIG. Whether or not the modification of the measurement conditions has ended is determined, for example, by whether or not the access to the storage device 18 started by the arithmetic device 14 has ended. When the access initiated by the arithmetic unit 14 is completed, it is determined that the setting change is completed, and the procedure proceeds to step 312 . If the access initiated by computing device 14 is ongoing, the procedure proceeds to step 702 . Then, in step 702, after waiting for a predetermined time Δt, the procedure moves to step 700. FIG. Since the predetermined time Δt varies depending on the specifications of the ultrasonic flaw detection system including the arithmetic device 14 and the storage device 18, a specific value is determined not only through design theoretical values but also through experiments using actual equipment.

As described above, in order to prevent erroneous measurement, the ultrasonic flaw detection system according to the present embodiment starts the next measurement after surely completing the setting change, thereby avoiding erroneous measurement of the area of the measurement target 50 and ultrasonic flaw detection. can be done properly.

10 Ultrasonic flaw detection system 12 Input device 14 Arithmetic device 16 Display device 18 Storage device 20 Camera 24 Ultrasonic probe 24M Probe marker 50 Measurement target 50R Reference marker 52 First area 52M, 52M1, 52M2 Measurement target marker 54 Second area 54M, 54M1, 54M2 Measurement target marker 56 Third area 56M Measurement target marker 58 Fourth area 58M Measurement target marker 60, 62, 64, 66 Boundary d1 _{, d2} , _d3 , _d4 Thickness

Claims (5)

A probe that measures the state of the measurement target by ultrasonic flaw detection while facing the measurement target;
a first marker provided on the probe and recording information indicating the presence of the probe in an optically readable state;
A state in which each area is provided in each area where the specifications indicating the material and thickness are continuously the same in the measurement object, the range of the provided area is indicated, and the information of the specification of the provided area can be optically read. the second marker recorded by
an imaging unit that captures an image of the measurement target;
Ultrasound by the probe based on information of specifications of a region indicated by one of the second markers selected based on the positional relationship between the first marker and the second marker detected from the image data acquired by the imaging unit. a control unit that sets conditions for ultrasonic flaw detection;
Ultrasonic flaw detection system including. 2. The ultrasonic flaw detection system according to claim 1, wherein one or more imaging units are provided. 3. The ultrasonic flaw detection system according to claim 1, wherein the first marker further records information about specifications of the probe. 4. The ultrasonic flaw detection system according to any one of claims 1 to 3, wherein the imaging unit is provided in the probe. 5. The probe according to any one of claims 1 to 4, further comprising a third marker as a reference marker, and estimating the advancing direction of the probe from a change in the positional relationship between the third marker and the first marker. 2. The ultrasonic flaw detection system according to item 1.

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