JPH0954067A - Flaw detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flaw detecting device which, when used as a supplementary means in places where an automatic flaw detecting device is not usable, can enhance the accuracy and reliability of inspection as compared with a simple manually-operated flaw detecting device and can enhance reproducibility. SOLUTION: A guide plate 4 provided with a scale 3 is bonded to the surface 2 to be inspected of a subject 1 for inspection, a scanner main body 5 which performs scans using the scale on the guide plate 4 is provided, and the results of inspection are displayed on an ultrasonic flaw detector 11 in accordance with an inspection signal 10 from the ultrasonic probe 6 of the scanner main body 5. In a counting device 12, the X-axis position of the ultrasonic probe 6 is calculated on the basis of an X-axis step-up signal 14 from the X-axis step-up switch 7 of the scanner main body 5, and the Y-axis position of the ultrasonic probe 6 is calculated on the basis of a Y-axis zero reset signal 16 from a Y-axis zero reset switch 8 and a pulse signal 17 from an encoder 9, the X- and Y-axis positions being subsequently recorded in a data sampling recording device 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flaw detector.

[0002]

2. Description of the Related Art Generally, when a periodic inspection is carried out in a reactor pressure vessel, an ultrasonic flaw detection inspection is performed on a welded portion such as a body of the reactor pressure vessel, and the welded portion is damaged. I try to inspect whether or not there is.

Conventionally, as a flaw detector for performing this kind of inspection, a so-called automatic type in which a traveling carriage equipped with an ultrasonic probe is self-propelled is often used, but an automatic flaw detector is used. In case of, installation of the device at the inspection point,
It is not easy to remove and takes time and effort,
Since it was necessary to mount a traveling device and various drive mechanisms, it was inevitable that the device would become large in size, and its use in narrow spaces was restricted.

For this reason, in the inspection of narrow spaces and the like, a so-called manual flaw detector has been used in which an operator who carries out the inspection holds an ultrasonic probe in his hand and moves it along the welded portion.

[0005]

However, in the manual flaw detector as described above, the position data when the ultrasonic probe is moved along the welded portion cannot be recorded in the device itself. It is not always sufficient in terms of inspection accuracy and reliability that the inspection worker must check the display of the flaw detection device on the spot to make a check, and mistakes may occur. On the other hand, if it becomes necessary to perform a flaw detection test again at the same location, the location where the ultrasonic probe is scanned will be left to the operator's judgment because there is no position data recorded in the device itself. However, it had a drawback of poor reproducibility.

In view of the above situation, the present invention provides an auxiliary use in a place where an automatic flaw detector cannot be used,
An object of the present invention is to provide a flaw detector which can improve the accuracy and reliability of inspection and can improve reproducibility as compared with a mere manual flaw detector.

[0007]

According to the present invention, a sensor for nondestructive inspection is caused to scan a surface to be inspected of an object to be inspected in a predetermined direction, and then the sensor is moved by a required pitch in a direction perpendicular to the scanning direction. A flaw detection device that repeats scanning in a predetermined direction, a guide plate that is attached to a required portion of an inspection target surface and is graduated at a required pitch in the longitudinal direction, a sensor for nondestructive inspection, and a guide plate. An X-axis step-up switch that is pressed each time the sensor moves from the X-axis reference point in the longitudinal direction in the longitudinal direction of the guide plate by one graduation,
A Y-axis zero reset switch that is pushed when the sensor is located at a Y-axis reference point in a direction perpendicular to the longitudinal direction of the guide plate, and a Y-axis reference point in a direction perpendicular to the longitudinal direction of the guide plate. A scanner body having an encoder for detecting the amount of movement of the sensor, a flaw detector for displaying the inspection result based on an inspection signal from the sensor of the scanner body, and a sensor at the X-axis reference point in the longitudinal direction of the guide plate. It has an X-axis zero reset switch that is pushed when it is positioned, and the sensor X from the X-axis reference point in the longitudinal direction of the guide plate based on the X-axis step-up signal from the X-axis step-up switch of the scanner body. The axis position is calculated and the length of the guide plate is determined based on the Y-axis zero reset signal from the Y-axis zero reset switch and the pulse signal from the encoder. A counting device for calculating the Y-axis position of the sensor from the Y-axis reference point in the direction perpendicular to the direction, and data collection for recording the X-axis position signal and the Y-axis position signal from the counting device and the inspection signal from the flaw detector. The present invention relates to a flaw detection device including a recording device.

Therefore, a guide plate is attached to a required portion of the surface to be inspected of the object to be inspected, and the scanner main body is aligned with the X-axis reference point on the scale of the guide plate and with the Y-axis reference point. After pressing the X-axis zero reset switch and the Y-axis zero reset switch of the scanner body to perform zero reset, scan the scanner body in the direction perpendicular to the longitudinal direction of the guide plate and inspect based on the inspection signal from the sensor. The result is displayed on the flaw detector, and the inspection signal from the flaw detector is recorded on the data sampling and recording device, and based on the pulse signal from the encoder, the Y-axis reference point in the direction perpendicular to the longitudinal direction of the guide plate is measured. The Y-axis position of the sensor is calculated by the counting device and output as a Y-axis position signal, and the data acquisition is performed together with the X-axis position signal representing the X-axis reference point. It is recorded in the recording apparatus.

When the scanner body is scanned over a required range in the direction perpendicular to the longitudinal direction of the guide plate, the scanner body is aligned with the scale next to the X-axis reference point on the scale of the guide plate, and at the Y-axis reference point. In the combined state, press the X-axis step-up switch and Y-axis zero reset switch on the scanner body.

When the X-axis step-up switch of the scanner body is pressed, the X-axis step-up signal is input to the counting device, the X-axis position of the sensor is calculated by the counting device, and output as the X-axis position signal.

After pressing the X-axis step-up switch and the Y-axis zero reset switch of the scanner main body, the scanner main body is scanned in the direction perpendicular to the longitudinal direction of the guide plate. The inspection result is displayed on the flaw detector based on the above, the inspection signal from the flaw detector is recorded on the data sampling and recording device, and the Y axis in the direction perpendicular to the longitudinal direction of the guide plate based on the pulse signal from the encoder. The Y-axis position of the sensor from the reference point is calculated by the counting device, output as a Y-axis position signal, and recorded in the data sampling and recording device together with the X-axis position signal.

Thereafter, the same operation as described above is repeated over the entire inspection range.

As a result, the inspection result scanned by the sensor is recorded together with the position data scanned by the sensor, and there is almost no error, and the accuracy and reliability of the inspection are improved. Even when it is necessary to perform the flaw detection inspection, since the position data is recorded, the position where the sensor is scanned becomes clear and the reproducibility is improved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show an example of an embodiment for carrying out the present invention, in which a scale 3 is provided at a required pitch in the longitudinal direction at a required portion of a surface 2 to be inspected of an inspection object 1 such as a reactor pressure vessel. A guide plate 4 such as a magnet sheet is attached and a scanner main body 5 for scanning using the scale 3 of the guide plate 4 is provided.

As shown in FIGS. 1 to 4, the scanner body 5 includes an ultrasonic probe 6 as a sensor for nondestructive inspection,
An X-axis step-up switch 7 that is pushed each time the ultrasonic probe 6 moves in the longitudinal direction of the guide plate 4 by one scale from the X-axis reference point in the longitudinal direction of the guide plate 4.
And a Y-axis zero reset switch 8 that is pushed when the ultrasonic probe 6 is positioned at a Y-axis reference point that is perpendicular to the longitudinal direction of the guide plate 4, and the longitudinal direction of the guide plate 4. Ultrasonic probe 6 from the Y-axis reference point in the orthogonal direction
And an encoder 9 for detecting the movement amount of the.

An ultrasonic flaw detector 11 is connected to the ultrasonic probe 6 of the scanner body 5 as a flaw detector for displaying an inspection result based on an inspection signal 10 from the ultrasonic probe 6. A counting device 12 is connected to the X-axis step-up switch 7, the Y-axis zero reset switch 8 and the encoder 9 of the scanner body 5.

The counting device 12 is, as shown in FIG.
It has an X-axis zero reset switch 13 which is pushed when the ultrasonic probe 6 is located at the X-axis reference point in the longitudinal direction of the guide plate 4, and is provided from the X-axis step-up switch 7 of the scanner body 5. The X-axis position 15 of the ultrasonic probe 6 from the X-axis reference point in the longitudinal direction of the guide plate 4 is calculated based on the X-axis step-up signal 14, and the Y-axis zero reset signal from the Y-axis zero reset switch 8 is calculated. 1
6 and the pulse signal 17 from the encoder 9, the Y-axis position 18 of the ultrasonic probe 6 from the Y-axis reference point in the direction perpendicular to the longitudinal direction of the guide plate 4 is calculated. The X-axis position 15 of the acoustic wave probe 6 includes a counter 19 and an adder 21 in which the X-axis step width 20 is preset.
After being calculated by and, BCD (Binary Co
ded Decimal) converter 2
X-axis position signal 2 converted to binary coded decimal via 2
3 and the Y-axis position 18 of the ultrasonic probe 6 is calculated by the pulse counter 24 and then B
Converted to a binary coded decimal number via the CD converter 25, Y
The axis position signal 26 is output.

The ultrasonic flaw detector 11 and the counting device 12
Is the X-axis position signal 23 and Y from the counting device 12.
Axis position signal 26 and inspection signal 1 from ultrasonic flaw detector 11
A data sampling recording device 27 for recording 0'and 0 is connected.

The data sampling / recording device 27, as shown in FIG. 6, receives the X-axis position signal 23, the Y-axis position signal 26 and the A /
Inspection signal 1 digitally converted via D converter 28
0 "is temporarily stored in the internal memory 29, and the data temporarily stored in the internal memory 29 is processed in the central processing unit 31 by an input operation by the input device 30 such as a keyboard and a mouse, and is required. Not only is displayed on the display device 32 as data obtained by processing and organizing for easy identification and the like, and
Recording is performed on a recording medium 33 such as an optical disk.

Next, the operation of the illustrated example will be described.

First, the surface 2 to be inspected of the object 1 to be inspected is prepared, a marking line is put in a required portion of the surface 2 to be inspected, and glycerin paste or the like is applied to the surface 2 to be inspected as an ultrasonic couplant. Then, the guide plate 4 is attached to the surface 2 to be inspected.

Subsequently, the scanner body 5 connected as shown in FIG. 1 is attached to the scale 3 of the guide plate 4 as shown in FIGS.
The X-axis zero reset switch 13 of the counting device 12 and the Y-axis zero reset switch 8 of the scanner body 5 are aligned with the X-axis reference point in FIG.
After performing zero reset by pressing, the scanner main body 5 is scanned in the direction (Y-axis direction) perpendicular to the longitudinal direction of the guide plate 4, and the inspection result is obtained based on the inspection signal 10 from the ultrasonic probe 6. Is displayed on the ultrasonic flaw detector 11, and the inspection signal 10 ′ from the ultrasonic flaw detector 11 is displayed on the A / D converter 2
A test signal 10 ″ digitally converted via 8 is temporarily stored in the internal memory 29 of the data sampling / recording device 27, and in the direction perpendicular to the longitudinal direction of the guide plate 4 based on the pulse signal 17 from the encoder 9. The Y-axis position 18 of the ultrasonic probe 6 from the Y-axis reference point is calculated by the pulse counter 24 of the counting device 12, converted into a binary coded decimal number via the BCD converter 25, and the Y-axis position signal is obtained. 26 and is temporarily stored in the internal memory 29 of the data sampling and recording device 27 together with the X-axis position signal 23 representing the X-axis reference point.

The inspection signal 10 "temporarily stored in the internal memory 29 of the data sampling recording device 27, the X-axis position signal 23 and the Y-axis position signal 26 are stored in the central processing unit 31.
The data that has been processed in step (1), has been taken out, and has been processed and organized for facilitating identification and the like, is displayed on the display device 32 and is also recorded on the recording medium 33 such as an optical disk. .

When the scanner body 5 is scanned over the required range in the direction (Y-axis direction) perpendicular to the longitudinal direction of the guide plate 4, the scanner body 5 is moved along the X-axis of the scale 3 of the guide plate 4.
The X-axis step-up switch 7 and the Y-axis zero reset switch 8 of the scanner body 5 are pressed while the scale 3 next to the axis reference point is set and the Y-axis reference point is set.

When the X-axis step-up switch 7 of the scanner body 5 is pressed, the X-axis step-up signal 14 is input to the counter 19 of the counting device 12, and the ultrasonic probe 6
X-axis position 15 of the counter 19 and X-axis step width 20
Is calculated by the preset adder 21 and
Converted to binary coded decimal through the BCD converter 22,
The X-axis position signal 23 is output.

After pressing the X-axis step-up switch 7 and the Y-axis zero reset switch 8 of the scanner body 5,
When the scanner body 5 is scanned in a direction (Y-axis direction) perpendicular to the longitudinal direction of the guide plate 4, the inspection result is ultrasonic flaw detector based on the inspection signal 10 from the ultrasonic probe 6 as described above. 11, the inspection signal 10 ′ from the ultrasonic flaw detector 11 is temporarily stored in the internal memory 29 of the data sampling recording device 27, and the guide signal of the guide plate 4 is generated based on the pulse signal 17 from the encoder 9. The Y-axis position 18 of the ultrasonic probe 6 from the Y-axis reference point in the direction orthogonal to the longitudinal direction is calculated by the pulse counter 24 of the counting device 12 and converted into a binary coded decimal number via the BCD converter 25. Is output as a Y-axis position signal 26 and is temporarily stored in the internal memory 29 of the data sampling and recording device 27 together with the X axis position signal 23. The inspection signal 10 ″ temporarily stored in the memory 29, the X-axis position signal 23, and the Y-axis position signal 26.
Means that the data is processed by the central processing unit 31, only necessary portions are taken out, and processed and arranged to facilitate identification and the like, and is displayed on the display device 32 and is also displayed on the optical disc or the like. It is recorded on the recording medium 33.

Thereafter, the same operation as described above is repeated over the entire inspection range.

As a result, the inspection result scanned by the ultrasonic probe 6 is recorded together with the position data scanned by the ultrasonic probe 6, so that there is almost no error and the accuracy and reliability of the inspection are high. On the other hand, even if it is necessary to perform a flaw detection test again at the same location, the location data is recorded, so that the location where the ultrasonic probe 6 is scanned becomes clear and reproducibility is improved. Also gets better.

As described above, when the automatic flaw detector is used in a place where it cannot be used, the accuracy and reliability of the inspection can be improved and the reproducibility can be improved as compared with the mere manual flaw detector. obtain.

The flaw detection apparatus of the present invention is not limited to the above-mentioned illustrated example, but can be applied to various devices and structures other than the reactor pressure vessel, and ultrasonic waves can be used as a sensor. A coil that uses eddy current may be used instead of the probe, and an eddy current flaw detector that displays eddy current induced by the coil may be used instead of the ultrasonic flaw detector as a flaw detector. Needless to say, various changes can be made without departing from the scope of the present invention.

[0032]

As described above, according to the flaw detection apparatus of the present invention, when it is used supplementarily in a place where the automatic flaw detection apparatus cannot be used, compared to a simple manual flaw detection apparatus,
The excellent effect that the accuracy and reliability of the inspection can be improved and the reproducibility can be improved can be achieved.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram of an example of an embodiment of the present invention.

FIG. 2 is a perspective view showing a guide plate and a scanner body according to an example of an embodiment of the present invention.

FIG. 3 is a plan view showing a guide plate and a scanner body according to an example of an embodiment of the present invention.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a schematic configuration diagram of a counting device according to an example of an embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a data collection recording device in an example of an embodiment of the present invention.

[Explanation of symbols]

 1 inspection object 2 inspection surface 3 scale 4 guide plate 5 scanner body 6 ultrasonic probe (sensor) 7 X-axis step-up switch 8 Y-axis zero reset switch 9 encoder 10 inspection signal 10 'inspection signal 11 ultrasonic flaw detection Instrument (flaw detector) 12 Counting device 13 X-axis zero reset switch 14 X-axis step-up signal 15 X-axis position 16 Y-axis zero reset signal 17 Pulse signal 18 Y-axis position 23 X-axis position signal 26 Y-axis position signal 27 Data sampling Recording device

Claims (1)

[Claims] 1. A nondestructive inspection sensor is made to scan a surface to be inspected of an object to be inspected in a predetermined direction, then moved by a required pitch in a direction perpendicular to the scanning direction, and scanning in the predetermined direction is repeated. The flaw detector is a guide plate that is attached to the required area of the inspection surface and has a scale in the longitudinal direction at the required pitch, a sensor for nondestructive inspection, and an X-axis reference point in the longitudinal direction of the guide plate. An X-axis step-up switch that is pressed each time the sensor moves in the longitudinal direction of the guide plate by one graduation, and when the sensor is located at the Y-axis reference point in the direction perpendicular to the longitudinal direction of the guide plate. A scanner body having a Y-axis zero reset switch that is pressed and an encoder for detecting the amount of movement of the sensor from a Y-axis reference point in a direction perpendicular to the longitudinal direction of the guide plate, and a scanner. It has a flaw detector that displays the inspection result based on the inspection signal from the sensor of the main body, and an X-axis zero reset switch that is pressed when the sensor is located at the X-axis reference point in the longitudinal direction of the guide plate. , Calculates the X-axis position of the sensor from the X-axis reference point in the longitudinal direction of the guide plate based on the X-axis step-up signal from the X-axis step-up switch of the scanner body, and Y-axis zero from the Y-axis zero reset switch. A counting device that calculates the Y-axis position of the sensor from the Y-axis reference point in the direction perpendicular to the longitudinal direction of the guide plate based on the reset signal and the pulse signal from the encoder, and the X-axis position signal and the Y-axis position from the counting device. A flaw detector, comprising: a data sampling and recording device that records a signal and an inspection signal from the flaw detector.