KR101176290B1

KR101176290B1 - Apparatus for non-destructive testing

Info

Publication number: KR101176290B1
Application number: KR1020100090106A
Authority: KR
Inventors: 윤병식; 이희종; 김용식
Original assignee: 한국수력원자력 주식회사
Priority date: 2010-09-14
Filing date: 2010-09-14
Publication date: 2012-08-22
Also published as: KR20120028099A

Abstract

A nondestructive testing device is provided. The non-destructive inspection device is a device for performing a non-destructive inspection on the inspection object, a central axis including an angular encoder, a rotating part connected to the central axis to rotate about the central axis, the arm connected to the rotating part, the arm And a transducer support connected to the arm and moving in the longitudinal direction of the arm, the transducer being connected to the transducer support. The angle encoder may measure the rotation angle of the transducer, and the distance encoder may measure the radius of rotation of the transducer.

Description

Non-destructive testing device {APPARATUS FOR NON-DESTRUCTIVE TESTING}

The present invention relates to a non-destructive inspection device, and more particularly, to provide a non-destructive inspection device capable of performing a non-destructive inspection on the inspection object of various shapes.

In general, nondestructive inspections are conducted to check the integrity or soundness of industrial facilities. 1A and 1B are diagrams for explaining a nondestructive testing method using a conventional nondestructive testing device.

1A and 1B, the non-destructive inspection device 10 includes a drive unit 11, an arm 12, and a transducer 13. The drive unit 11 is equipped with a wheel so that the non-destructive inspection device 10 can move in the X-axis direction (left and right directions). In addition, the transducer 13 is connected to the arm 12 and can move in the Y-axis direction (front and rear direction). In this way, the transducer 13 moves in a zigzag form (see arrows in FIG. 1A) by the X-axis movement of the drive unit 11 and the Y-axis movement of the transducer 13 with respect to the surface of the inspection object 20. The test will be performed. The test result is output as the output signal 25, and the output signal 25 is displayed in the rectangular coordinate system which is represented by the X-axis and Y-axis movement of the transducer 13. In addition, the defect 21 on the surface of the inspection object 20 is indicated by the defect signal 26 in the rectangular coordinate system.

However, the conventional non-destructive testing device 10 is a spherical or circular surface of the test object, such as the spherical pressure vessel 300 shown in Figure 2a and the cylindrical pressure vessel 400 shown in Figure 2b (310) 410 cannot be properly performed. On the other hand, by installing a track on the spherical surface, the transducer 13 can be forcibly moved on the spherical surface. However, since the inspection result is displayed in the Cartesian coordinate system of the plane, even if the defect on the spherical surface is detected, the position and size of the defect can be accurately evaluated. Can't.

In order to solve the above problems, the present invention provides a non-destructive inspection device that can perform a non-destructive inspection on the inspection object of various shapes, including a spherical or cylindrical pressure vessel.

Non-destructive inspection device according to an embodiment of the present invention, a non-destructive inspection for the inspection object, a central axis including an angle encoder, a rotating portion connected to the central axis to rotate about the central axis, the rotating portion And a transducer connected to the arm, connected to the arm and moving in the longitudinal direction of the arm, the transducer support including a distance encoder, and a transducer connected to the transducer support. The angle encoder may measure the rotation angle of the transducer, and the distance encoder may measure the radius of rotation of the transducer.

The cancer may be bent according to the appearance of the test object. In addition, the arm can move in the vertical direction to the rotating portion axis.

The non-destructive inspection device may further include a central axis supporter that supports the central axis and is disposed to contact the inspection object. The central shaft support portion may include a magnet on a contact surface in contact with the test object, or may include a means for generating a negative air pressure at the contact portion during the contact.

The non-destructive inspection device may further include a motor connected to the rotating part and the probe supporter to drive the rotating part and the probe supporter, respectively.

The non-destructive inspection device may further include a signal processor electrically connected to the probe, the angle encoder, and the distance encoder, and a signal display part electrically connected to the signal processor.

The signal processor may combine the signals received from the transducer, the angle encoder, and the distance encoder and convert the signals into digital signals, and the signal display unit may output the digital signals as output signals. The output signal may be displayed in a three-dimensional circumferential coordinate system in the same manner as the shape of the inspection object.

By the non-destructive testing device according to an embodiment of the present invention, the non-destructive testing of various inspection objects can be performed accurately, including spherical or cylindrical pressure vessels, which are difficult to test with a conventional non-destructive testing device. The non-destructive testing can be performed semi-automatically or automatically. In addition, the inspection result is displayed in the three-dimensional circumferential coordinate system in the same manner as the actual shape, so that the evaluation of the inspection result can be performed accurately and easily.

1A and 1B are diagrams for explaining a nondestructive testing method using a conventional nondestructive testing device.
FIG. 2A shows a spherical pressure vessel including a weld, and FIG. 2B shows a cylindrical pressure vessel including a weld.
3A is a plan view of a non-destructive inspection device according to an embodiment of the present invention, and FIG. 3B is a side view of the non-destructive inspection device shown in FIG. 3A.
4 is a side view of a non-destructive inspection device according to another embodiment of the present invention.
5 is a view for explaining a non-destructive testing method according to an embodiment of the present invention.
Figure 6a is a view for explaining a method for performing a non-destructive test according to an embodiment of the present invention for the spherical pressure vessel, Figure 6b is a view showing the non-destructive test results of Figure 6a.
7A is a view for explaining a method for performing a non-destructive test according to an embodiment of the present invention for the cylindrical pressure vessel, Figure 7b is a view showing the non-destructive test results of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The objects, features, and advantages of the present invention will be readily understood through the following embodiments related to the accompanying drawings. The invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

3A is a plan view of a non-destructive inspection device according to an embodiment of the present invention, and FIG. 3B is a side view of the non-destructive inspection device shown in FIG. 3A.

3A and 3B, the non-destructive inspection device 100 includes a central axis 110, a central axis support part 120, a rotating part 130, an arm 140, a probe 150, and a probe support part 160. It may include.

The central axis 110 includes an angle encoder capable of measuring the rotation angle of the transducer 150 rotating about the central axis 110. The central axis supporter 120 may support the central axis 110. The rotating unit 130 may be connected to the central axis 110 and rotate about the central axis 110. In this embodiment, the rotating unit 130 has a pipe shape surrounding the central axis, but is not limited thereto and may have various shapes. The arm 140 may be connected to the rotating part 130 by a connecting means 135 such as a hinge, and may rotate around the central axis 110 according to the rotation of the rotating part 130.

The transducer 150 may be connected to the arm 140 by the transducer support 160, and may rotate around the central axis 110 according to the rotation of the arm 140. In addition, the transducer 150 may move in the longitudinal direction of the arm 140 by the transducer support 160. That is, the transducer 150 may approach the central axis 110 or move away from the central axis 110 by the movement of the transducer support unit 160 connected to the arm 140. As such, the transducer 150 may perform the non-destructive inspection while moving the surface of the inspection object by the rotational movement and the linear movement. In addition, since the arm 140 is connected to the rotating part 130 by a connecting means 135 such as a hinge, the arm 140 may move in the vertical direction about the rotating part 130. Therefore, even if the surface of the inspection object is non-uniform, the transducer 150 may move along the non-uniform surface. The transducer support 160 includes a distance encoder capable of measuring the distance between the central axis 110 and the transducer 150. All positions of the transducer 150 within the range in which the arm 140 rotates by the angle encoder and the distance encoder are the rotation angle of the transducer 150 and the distance between the central axis 110 and the transducer 150, that is, the transducer ( 150 can be represented by the radius of rotation.

The non-destructive inspection device 100 may further include a motor connected to the rotating unit 130 and the transducer support unit 160 to drive the rotating unit 130 and the transducer support unit 160. Non-destructive testing can be performed automatically by the motor.

4 is a side view of a non-destructive inspection device according to another embodiment of the present invention.

Referring to FIG. 4, the non-destructive inspection device 100 may include an arm 140 that is curved according to the shape of the spherical surface when the inspection object is a spherical surface. That is, the extension line in the longitudinal direction of the arm 140 may have the same radius as the radius of the spherical surface. The transducer 140 may move along the spherical surface by the arm 140.

5 is a view for explaining a non-destructive testing method according to an embodiment of the present invention. Figure 6a is a view for explaining a method for performing a non-destructive test according to an embodiment of the present invention for the spherical pressure vessel, Figure 6b is a view showing the non-destructive test results of Figure 6a.

5, 6A, and 6B, the signal processor 210 is electrically connected to the non-destructive inspection device 100, and the signal display unit 220 is electrically connected to the signal processor 210. In this case, the electrical connection may mean that transmission and reception of an electrical signal is possible between two components. Specifically, the signal processor 210 may be electrically connected to the transducer 150 of the non-destructive inspection device 100, the angle encoder included in the central axis 110, and the distance encoder included in the transducer support 160.

For the non-destructive inspection, the central axis support portion 120 of the non-destructive inspection device 100 is disposed in the spherical center of the spherical pressure vessel 300 to be inspected. The central shaft support part 120 may include a magnet in a contact surface contacting the test object, or may include a means for generating a negative air pressure in the contact area when the contact is made. As a result, the central shaft support part 120 may be fixed to the surface of the pressure vessel 300.

The arm 140 rotates according to the rotation of the rotation unit 130, whereby the transducer 150 rotates about the central axis 110. In addition, as the transducer support unit 160 moves, the transducer linearly moves in the longitudinal direction of the arm 140. In detail, the probe 150 performs the inspection while linearly moving toward the central axis 110, and then performs the inspection while rotating and rotating about the central axis 110. Subsequently, the probe 150 performs the inspection while linearly moving in the direction opposite to the direction toward the central axis 110, and then performs the inspection while rotating around the central axis 110. That is, the transducer 150 performs a non-destructive inspection on the spherical surface of the pressure vessel 300 in a zigzag form (see the arrow of Figure 6a) while repeating the linear movement and the rotational movement. In this embodiment, the transducer 150 moves in a zigzag form, but is not limited thereto and may select various paths. For example, the transducer 150 may move along a path repeating 360 degrees (one rotation) rotational movement and linear movement.

The transducer 150 transmits the transducer signal obtained by scanning the surface of the spherical surface of the pressure vessel 300 to the signal processor 210. The angular encoder transmits the angular encoder signal obtained according to the rotational movement of the transducer 150 to the signal processor 210. The distance encoder transmits the distance encoder signal obtained according to the linear movement of the transducer 150 to the signal processor 210.

The signal processor 210 combines the probe signal, the angle encoder signal, and the distance encoder signal received from the non-destructive inspection device 100, converts the signal into a digital signal, and transmits the converted signal to the signal display unit 220. The signal display unit 220 may be, for example, a computer monitor, and outputs a digital signal received from the signal processor 210 as an output signal 350.

The output signal 350 may be displayed in a three-dimensional circumferential coordinate system represented by the rotation angle θ of the transducer 150 and the rotation radius r of the transducer. The defect 320 formed on the spherical surface of the pressure vessel 300 appears as a defect signal 360 in the output signal 350.

7A is a view for explaining a method for performing a non-destructive test according to an embodiment of the present invention for the cylindrical pressure vessel, Figure 7b is a view showing the non-destructive test results of FIG.

7A and 7B, the central axis support part 120 of the non-destructive inspection device 100 is disposed at the center of the upper circular surface of the cylindrical pressure vessel 400. In the same manner as in the above-described embodiment, the transducer 150 performs a non-destructive inspection on the surface of the circular surface of the pressure vessel 400 while repeating the rotational movement and the linear movement.

The nondestructive test result is output to the output signal 450. The output signal 450 may be represented by a three-dimensional circumferential coordinate system represented by the rotation angle θ of the transducer 150 and the rotation radius r of the transducer. The defect 420 formed on the circular surface of the pressure vessel 400 is represented by the defect signal 460 in the output signal 450.

As described above, by using the non-destructive inspection device according to the embodiments of the present invention, the non-destructive inspection can be performed semi-automatically or automatically on the inspection object having a shape that is difficult to test by the conventional non-destructive inspection device.

Hereinafter, specific embodiments of the present invention have been described. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: non-destructive inspection device 110: central axis
120: central axis support portion 130: rotation part
135 connection means 140 arm
150: probe 160: probe support
210: signal processor 220: signal display unit
300: spherical pressure vessel 400: cylindrical pressure vessel

Claims

A device for performing nondestructive testing on an inspection object,
A central axis including an angular encoder;
A rotating part connected to the central axis and rotating about the central axis;
An arm connected to the rotating part;
A transducer support connected to the arm and moving in the longitudinal direction of the arm, the transducer support including a distance encoder; And
It includes a transducer connected to the transducer support,
And the angle encoder measures a rotation angle of the transducer, and the distance encoder measures a radius of rotation of the transducer.

The method of claim 1,
Non-destructive testing device, characterized in that the arm is bent in accordance with the appearance of the inspection object.

The method of claim 1,
The arm is a non-destructive inspection device, characterized in that for moving the rotary part in the vertical direction in the axis.

The method of claim 1,
Supporting the central axis, further comprising a central axis support portion disposed to contact the inspection object,
The central axis support unit is a non-destructive inspection device comprising a means for including a magnet on the contact surface in contact with the inspection object, or generating a negative air pressure in the contact with the inspection object.

The method of claim 1,
Non-destructive inspection device further comprises a motor connected to each of the rotating unit and the transducer support to drive the rotating unit and the transducer support.

The method of claim 1,
A signal processor electrically connected to the probe, the angle encoder, and the distance encoder, and a signal display part electrically connected to the signal processor;
The signal processor combines the signals received from the transducer, the angle encoder and the distance encoder and converts them into digital signals,
And the signal display unit outputs the digital signal as an output signal.

The method according to claim 6,
And the output signal is displayed in a three-dimensional circumferential coordinate system in the same way as the shape of the inspection object.