KR20220126873A - Portable nondestructive inspection apparatus based on nonlinear solitary wave - Google Patents

Abstract

The present invention relates to a portable non-destructive inspection device based on nonlinear isolated waves, comprising: a plurality of spherical particles arranged in a line in contact with each other; sensor particles arranged in a line with the spherical particles to form a particle chain; a guide tube formed in a cylindrical shape forming a guide space including the particle chain, and having protruding holes through which a part of the particle constituting the particle chain protrudes from the front end and the rear end; and an oscillation part fixed to the guide tube, and applying an impact to the constituent particles located at a last end. Accordingly, the portable non-destructive inspection device is easy to carry and can perform non-destructive inspection in various postures.

Description

PORTABLE NONDESTRUCTIVE INSPECTION APPARATUS BASED ON NONLINEAR SOLITARY WAVE

The present invention relates to a non-linear isolated wave-based portable non-destructive testing device, and more particularly, to a non-linear isolated wave-based portable non-destructive testing device capable of stably generating a non-linear isolated wave regardless of a posture of use.

As a type of non-destructive testing device, there is an inspection device using non-linear isolated waves.

The non-linear isolated wave-based non-destructive testing device has a chain structure composed of a number of spherical particles as its main component. Through this chain structure, the nonlinear isolated wave propagates stably, and the reflected wave reflected from the test specimen is sensitively changed according to the mechanical properties of the medium, so accurate test results can be obtained.

As shown in FIG. 1, a conventional general nonlinear isolated wave-based non-destructive testing device includes a vertical guide 10 having a space extending up and down therein, and a plurality of spherical shapes disposed up and down in the guide 10. The particle 2, the excitation particle 1 that applies an impact to the uppermost spherical particle, and a sensor 3 disposed between the spherical particles 2 and the like are included.

In this conventional non-destructive testing device, the excitation particle 1 is dropped onto the uppermost spherical particle 2 to generate a nonlinear isolated wave in the chain of spherical particles 10, and the nonlinear isolated wave transmitted to the lowermost spherical particle is transmitted to the test specimen. After being transmitted to (4), the reflected wave reflected from the test specimen (4) is measured by the sensor (3), and the inspection of the test specimen (4) can be performed.

However, by the conventional non-destructive testing apparatus having the structure as described above, there is a limit to the objects that can be tested because the test has to be carried out with the guide 10 standing on the upper part of the test specimen 4, and , there is a disadvantage in that it is not easy to carry by the structure of the guide 10 to maintain the chain of the spherical particles (10).

WO 2009100064 A2

Accordingly, an object of the present invention is to provide a non-linear isolated wave-based portable non-destructive testing device that is easy to carry and capable of performing non-destructive testing in various postures as to solve such conventional problems.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The above object, according to the present invention, a plurality of spherical particles arranged in a line in contact with each other; sensor particles arranged in a line with the spherical particles to form a particle chain; a guide tube having a cylindrical shape forming a guide space including the particle chain and having a protrusion through which a portion of the constituent particles constituting the particle chain protrudes from a front end and a rear end; and an excitation unit fixed to the guide tube and applying an impact to the constituent particles located at the rearmost end.

A pre-compression member for adhering the constituent particles to each other may be provided at at least one of the front end and the rear end of the guide space.

The force of the pre-compression member to adhere the constituent particles may be adjustable.

The guide tube includes a guide tube body having a cylindrical shape forming the guide space, and a stopper coupled to at least one of a front end and a rear end of the guide tube body and having the protrusion, the pre-compression member is Interposed between the end of the guide tube body and the stopper, the stopper may be screw-coupled to the guide tube body.

A slit may be provided on the wall of the guide tube.

The sensor particles may include a sensing unit having a cylindrical shape and provided with a sensor, and contact units formed at both ends of the sensing unit and having a hemispherical shape.

Two of the sensor particles may be disposed to be spaced apart from each other.

The sensor particles may be disposed at the frontmost end of the guide space.

The vibrating unit includes a vibrating particle guide tube fixed to the rear end of the guide tube, vibrating particles disposed adjacent to the constituent particles at the last end of the guide tube in the excitation particle guide tube, and moving the excitation particle in the direction of the guide tube. It may include an oscillation unit that oscillates.

The oscillation unit includes a spring for pushing the excitation particle in the direction of the guide tube, a connecting rod having a front end connected to the excitation particle and a rear end having a first magnet, and a second magnet and moving with respect to the first magnet It may include a trigger part that is possible.

The trigger unit, a handle fixed to the outer surface of the guide tube, is fixed to the handle so as to be movable in a direction parallel to the guide tube, a tree having a trigger provided at the front end and the second magnet at the rear end It may include a giant, and a trigger spring for pressing the trigger in the direction of the tip of the trigger bar.

The first magnet and the second magnet may be disposed to be spaced apart from the constituent particles by a distance where the magnetic force does not reach the constituent particles.

The second magnet may be composed of an electromagnet or a plurality of permanent magnets so that magnetic force can be adjusted.

Among the constituent particles, the one located at the most tip may have a flat tip.

It may further include a diagnostic unit connected to the sensor particle.

The diagnosis unit may include a data unit storing data obtained from the sensor particles for each state of a test subject, a learning unit learning the data stored in the data unit, a diagnosis model storage unit storing a diagnosis model derived from the learning unit, and the diagnosis It may include an analysis unit that analyzes the data obtained from the sensor particles based on the model.

The non-linear isolated wave-based portable non-destructive testing device according to the present invention can carry out non-destructive testing in various industrial sites other than laboratories while carrying it, and can perform non-destructive testing regardless of the location or angle of the test target.

When the non-linear isolated wave-based portable non-destructive inspection device according to the present invention further includes a pre-compression member or the sensor particle has a sensing unit and a contact unit, the possibility of malfunction of the non-destructive inspection device according to the present invention is reduced to improve the accuracy of non-destructive inspection. can elevate

The structural feature of the oscillation unit that oscillates the excited particles facilitates the use of the non-destructive testing device according to the present invention.

1 is an explanatory diagram of a conventional non-linear isolated wave-based non-destructive inspection device;
2 is a perspective view of a non-linear isolated wave-based portable non-destructive testing device according to the present invention;
3 is a cross-sectional view of a non-linear isolated wave-based portable non-destructive testing device according to the present invention;
4 is an explanatory view of a pre-compression member constituting a non-linear isolated wave-based portable non-destructive inspection device according to the present invention;
5 and 6 are explanatory views of sensor particles constituting a non-linear isolated wave-based portable non-destructive inspection device according to the present invention;
7 is an explanatory view of an excitation unit constituting a non-linear isolated wave-based portable non-destructive inspection device according to the present invention;
8 is an explanatory view of a case in which the tip of the one located at the foremost among the constituent particles constituting the non-linear isolated wave-based portable non-destructive inspection device according to the present invention is formed flat;
9 is an explanatory diagram of a diagnostic unit constituting a non-linear isolated wave-based portable non-destructive testing apparatus according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

2 is a perspective view of a non-linear isolated wave-based portable non-destructive testing device 1 according to the present invention, and FIG. 3 is a cross-sectional view of a non-linear isolated wave-based portable non-destructive testing device 1 according to the present invention.

The non-linear isolated wave-based portable non-destructive inspection device 1 according to the present invention is made including a plurality of spherical particles 10, a sensor particle 20, a guide tube 30 and an excitation part 40, and the overall shape is It is made in the shape of a gun.

A plurality of spherical particles 10 are arranged in a line in contact with each other. Each spherical particle 10 may be made of, for example, a metal material such as stainless steel.

The sensor particles 20 are arranged in line with the spherical particles 10 to form a particle chain (C). One or two sensor particles 20 may be formed, and may be disposed between the spherical particles 10 or at the ends of the particle chains C.

The spherical particle 10 and the sensor particle 20 constituting the particle chain C may be positioned in contact with each other to propagate a nonlinear isolated wave. As the nonlinear isolated wave passes through the sensor particle 20 , the sensor particle 20 has the same mass, shape and material as the spherical particle 10 as much as possible so that the wave characteristics do not change. It is preferable to form

The spherical particles 10 and the sensor particles 20 constituting the particle chain C will be referred to as 'constituting particles (P)'.

The guide tube 30 has a long cylindrical shape as a whole, and includes a guide space S extending along the longitudinal direction therein. The particle chain (C) is located. The diameter of the guide space (S) may be formed slightly larger than the diameter of the constituent particles (P).

A protrusion 31 having a diameter smaller than the diameter of the guide space S may be provided at the front and rear ends of the guide tube 30 . Through these protrusions 31, the particles P of the leading end and the rear end of the particle chain C may be partially protruded to the outside while being located in the guide space S. Accordingly, the constituent particles (P) of the leading end may be in contact with the inspection object (2), and the constituent particles (P) of the rear end may receive an impact from the outside of the guide tube (30).

The excitation part 40 is fixed to the outer surface of the guide tube 30, and serves to apply an impact to the constituent particles P located at the rearmost end. That is, a nonlinear isolated wave may be generated in the particle chain C by the impact applied by the excitation unit 40 .

The non-linear isolated wave-based portable non-destructive inspection device (1) of the present invention is the configuration of the last end in a state in which the constituent particles (P) partly protruding through the tip of the guide tube (30) are in contact with the surface of the inspection object (2) Non-destructive testing can be performed by applying an impact to the particle P with the excitation part 40 and transmitting the nonlinear isolated wave to the inspection target 2 through the particle chain C. More specifically, the state of the inspection object 2 is determined by measuring and comparing the isolated wave incident to the inspection object 2 from the sensor particle 20 constituting the particle chain C and the isolated isolated wave reflected from the inspection object 2 . can figure out

The non-linear isolated wave-based portable non-destructive testing device 1 of the present invention maintains the state in which the particle chain C is arranged in a line in the guide tube 30, while the leading and rearmost portions are outside the guide tube 30 It is possible to protrude into the guide tube 30, it is possible to apply the impact applied from the vibrating portion 40 located outside the guide tube 30 to the inspection target (2) located outside the guide tube (30). And the arrangement state of the particle chain (C) can be maintained regardless of which posture the guide tube 30 is placed.

Accordingly, it is possible to carry out the non-linear isolated wave-based portable non-destructive testing device (1) according to the present invention while carrying out the non-destructive testing in various industrial sites, not in the laboratory, and the position or angle of the inspection target (2) is related to Non-destructive testing can be performed without

The non-linear isolated wave-based portable non-destructive inspection device 1 according to the present invention may further include a pre-compression member 50 . 4 is an explanatory view of the pre-compression member 50 is shown.

The pre-compression member 50 is disposed at at least one of the front end and the rear end of the guide space (S) in the guide tube (30) and serves to bring the constituent particles (P) into close contact with each other.

Depending on the posture of the guide tube 30, the adhesion between the constituent particles P of the particle chain C may be weakened, and the pre-compression member 50 opposes the constituent particles P located at any one end. By pressing toward the directional end, the constituent particles P can always remain in close contact, and as a result, the nonlinear isolated wave can be smoothly transmitted through the particle chain C.

Accordingly, the non-destructive inspection apparatus 1 according to the present invention can obtain accurate inspection results regardless of the inspection posture.

The pre-compression member 50 may be made of, for example, a soft material such as rubber or silicone and interposed between the innermost inner wall of the guide space S and the constituent particles P. The pre-compression member 50 prevents the constituent particles P located at the shortest part by the pre-compression member 50 from coming into contact with the excitation part 40 or the inspection object 2, It may be formed in the form of a ring through which a part can pass.

The force of the pre-compression member 50 to adhere the constituent particles P may be adjustable.

If the adhesion between the constituent particles (P) is too large or too small, it may affect the propagation of the nonlinear isolated wave. It is possible to ensure that the isolated wave is smoothly transmitted through the particle chain (C).

The pre-compression member 50, for example, forms the guide tube 30 with the guide tube body 310 and the stopper 320, and the pre-compression member 50 between the guide tube body 310 and the stopper 320. It is formed so as to control the adhesion between the constituent particles (P) through a method interposed therebetween.

More specifically, the guide tube body 310 is formed in a cylindrical shape to form the guide space (S), and the stopper 320 is coupled to at least one of the front end and the rear end of the guide tube body 310, and the protrusion 31 ) is provided. In FIG. 4 by way of example, the case in which the stopper 320 is formed at both the front end and the rear end of the guide tube body 310 is illustrated.

The stopper 320 is formed in a short cylindrical shape that can wrap the end of the guide tube body 310, and a thread is formed on the outer peripheral surface of the end of the guide tube body 310 and the inner peripheral surface of the stopper 320, the guide tube body 310. And the stopper 320 may be screwed to each other.

And the pre-compression member 50 is interposed between the end of the guide tube body 310 and the stopper 320, depending on the length at which the stopper 320 is coupled to the guide tube body 310, the pre-compression member 50 is As the force for pressing the constituent particles (P) is changed, the adhesion between the constituent particles (P) is adjusted.

The guide tube body 310 and the stopper 320 screwed to each other can easily adjust the coupling length by rotating the stopper 320, and consequently, the adhesion between the constituent particles P can be easily adjusted.

At the rear end of the guide tube 30, the excitation portion 40 for applying an impact to the particles P at the rear end is located, so the stopper 320 screwed to the guide tube body 310 is the guide tube body ( 310) is preferably located in the direction of the tip.

When the stopper 320 is provided at both the front end and the rear end of the guide tube body 310 , the stopper 320 at the rear end is made of a soft material and can serve as the pre-compression member 50 .

The sensor particle 20 may include a sensing unit 210 and a contact unit 220 . 5 is an explanatory diagram of the sensor particle 20 is shown.

The sensing unit 210 has a short cylindrical shape and a sensor is provided therein. The sensor may be, for example, a piezoelectric sensor, and the piezoelectric material 211 of the piezoelectric sensor may be disposed in the middle portion of the sensing unit 210 in the longitudinal direction so as to be perpendicular to the longitudinal direction of the sensing unit 210 .

The contact part 220 is joined to both ends of the sensing part 210 and has a shape similar to a hemispherical shape in which only one surface is curved. The sensing unit 210 has insertion grooves at both ends, so that the contact unit 220 may be inserted and fixed in the insertion groove.

In the existing non-destructive testing device using non-linear isolated waves, the sensor particles were formed in a spherical shape and could be easily rolled. As a result, the angle between the piezoelectric material in the sensor particles and the propagation direction of the non-linear isolated wave changes depending on the posture of the sensor particles, resulting in sensing results. There was a problem with the inaccuracy.

However, in the present invention, the sensor particle 20 does not roll in the guide tube 30 by the sensing unit 210 formed in a short cylindrical shape, and thus the piezoelectric material 211 of the sensor particle 20 is propagated by the nonlinear isolated wave. Since it is always perpendicular to the direction, it is possible to obtain accurate sensing results. And this is particularly effective in the non-destructive testing apparatus 1 of the present invention, which is portable and can be used in various positions and angles.

The sensor particle 20 preferably has the same vibration characteristics as the spherical particle 10 so that the nonlinear isolated wave propagating through the particle chain C is not dispersed or reflected in the part of the sensor particle 20 . To this end, the sensor particle 20 is formed to have the same mass and contact stiffness as the spherical particle 10 . The contact portion 220 in contact with the spherical particle 10 may be formed to have the same curvature and physical properties as the spherical particle 10 , and thus may have the same contact rigidity as the spherical particle 10 .

The piezoelectric material 211 is preferably formed with a diameter smaller than the diameter of the sensing unit 210 body to be protected by the sensing unit 210 .

The piezoelectric material 211 of the sensor particle 20 is connected to the external voltmeter 3 through the signal line W, so that the voltage generated from the piezoelectric material 211 can be measured.

A slit (not shown) may be formed on the wall of the guide tube 30 to connect the sensor particle 20 and the external voltmeter 3 with the signal line W. The slit may be formed to be elongated in the longitudinal direction of the guide tube 30 , for example.

The slit of the guide tube 30 may be closed by the cover 70 . Accordingly, it is possible to minimize the influx of foreign substances into the guide tube 30 through the slit, thereby affecting the test result. The cover 70 may be fitted and fixed to the outer surface of the guide tube 30 because the cross-section is formed in an arc shape of more than 180 degrees. The cover 70 may be made of a transparent material so that the inside of the guide tube 30 can be checked.

The signal line W may be connected to the external voltmeter 3 through a gap between the guide tube 30 and the cover 70 .

As shown in (a) of FIG. 6, the sensor particles 20 may be disposed to be spaced apart from each other. In this case, it is possible to increase the accuracy of the inspection by checking whether there is an abnormality in the non-destructive inspection apparatus 1 according to the present invention.

That is, the attenuation of the nonlinear isolated wave varies greatly depending on the state of the particle chain C. By comparing the amplitude of the nonlinear isolated wave through the sensor particles 20 spaced apart from each other, the attenuation of the nonlinear isolated wave is confirmed. The state of (C) can be known, and the presence or absence of an abnormality in the non-destructive inspection device 1 can be checked according to the state of the particle chain (C).

And by comparing the signals of the two sensor particles 20 and confirming the direction of the nonlinear isolated wave, unnecessary interference signals caused by foreign substances in the particle chain C can be excluded from the data for the determination of the inspection object 2 .

In addition, it is also possible to detect an abnormality of the sensor particle 20 itself by comparing the signals of the two sensor particles 20 .

The sensor particles 20 may be disposed at the leading end of the guide space (S), as shown in (b) of FIG. Since these sensor particles 20 are in contact with the inspection object 2, the contact force between the sensor particles 20 and the inspection object 2 can be measured, and the measured contact force-related signal is used to analyze the state of the inspection object 2 It can be used as additional data for

7 is a cross-sectional view of the excitation part 40 is shown.

The excitation unit 40 includes an excitation particle guide tube 410 , an excitation particle 420 and an oscillation unit 430 .

The excitation particle guide tube 410 is fixed while surrounding the guide tube 30 at the rear end of the guide tube 30 . The excitation particle guide tube 410 extends along the extension direction of the guide tube 30 .

Excitation particles 420 are disposed adjacent to the constituent particles (P) of the last end of the guide tube (30) in the particle guide tube (410). A portion of the particles (P) at the rear end of the guide tube 30 protrudes to the outside of the guide tube 30 through the protrusion 31 , so it can come into contact with the particles 420 . The weight of the exciting particles 420 may be less than or equal to the weight of the constituent particles P. The diameter of the particle 420 with the particle 420 is formed to match the inner diameter of the particle guide tube 410, so that the particle guide tube 410 with the particle 420 can move in a straight line.

The oscillation unit 430 serves to oscillate the excitation particles 420 in the guide tube 30 direction. The excitation particle 420 oscillated by the oscillation unit 430 applies an impact to the constituent particles P of the last end of the guide tube 30 , and the nonlinear isolated wave propagates along the particle chain C in the guide tube 30 . make it possible

More specifically, the oscillation unit 430 includes a spring 431 , a connecting rod 432 , and a trigger unit 433 .

The spring 431 is a compression spring and serves to push the particles 420 in the guide tube 30 direction, which is disposed behind the particles 420 with the particles in the guide tube 410 . The spring 431 can push the excited particle 420, but it cannot pull the excited particle 420 because it is not bonded to the excited particle 420 .

The connecting rod 432 is a rod-shaped member disposed inside the particle guide tube 410 with a front end, and is connected to the particle 420 with the front end and protrudes outside the rear end of the particle guide tube 410 with the rear end. A first magnet 432a is provided at the rear end of the connecting rod 432 .

The connecting rod 432 may be disposed through the spring 431 , and a spring support 434 supporting the spring 431 is located at the rear end of the excitation particle guide tube 410 . The rear end of the spring 431 is connected to the spring support 434 . The connecting rod 432 may protrude to the outside of the particle 420 guide tube 410 with the rear end through the spring support 434 .

The trigger part 433 is provided with a second magnet M that generates an attractive force between the first magnet 432a and is formed to be movable with respect to the first magnet 432a.

The oscillator 430 may operate as follows.

Normally, the oscillation unit 430 is a first magnet 432a with the rear end of the connecting rod 432 and the trigger unit 433 in a state where the spring 431 is fully relaxed, as shown in FIG. 6( a ). and the second magnet (M) in contact with each other. At this time, the excitation particle 420 is positioned in a state that is in contact with the constituent particles (P) of the last end of the guide tube (30) but does not press the constituent particles (P).

When moving in the direction of the rear end of the particle guide tube 410 having the trigger part 433, when the moving distance is not large, as shown in FIG. 6 (b), the first magnet 432a and the second magnet ( The particles 420 with the connecting rod 432 move together by the attractive force of M) and the spring 431 is compressed. The excitation particles 420 moved together with the connecting rod 432 are separated from the constituent particles P of the last end of the guide tube 30 .

When the trigger part 433 is moved further, as shown in (c) of FIG. 6 , the elastic force of the compressed spring 431 becomes greater than the attractive force between the first magnet 432a and the second magnet M. The first magnet 432a and the second magnet M fall apart, and the particles 420 with the elastic force of the spring 431 move rapidly in the direction of the tip of the particle guide tube 410 with the guide tube 30 ) to apply an impact to the constituent particles (P) of the last stage.

When the particle 420 with the particle 420 comes into contact with the particle P at the end of the guide tube 30, the spring 431 has a fully relaxed state, and the particle 420 with the particle 420 is not bonded to the spring 431, Only the inertial force of the excitation particle 420 can affect the nonlinear isolated wave generated when the excitation particle 420 is oscillated and collides with the constituent particle P at the rear end of the guide tube 30 , and the spring 431 Elasticity has no effect.

After the excitation particle 420 collides with the constituent particles P at the rear end of the guide tube 30 to generate a nonlinear isolated wave, the excitation particle 420 vibrates by the vibration of the spring 431 and again a minute nonlinear isolated wave. However, since the time difference between the firstly generated nonlinear isolated wave and the subsequent minute nonlinear isolated wave is significantly larger than the time difference between the firstly generated nonlinear isolated wave and its reflected wave, the minute nonlinear isolated wave and the reflected wave caused by the vibration of the spring 431 can be distinguished. Alternatively, by identifying the direction of the small nonlinear isolated wave through the two sensor particles 20 , it can be distinguished from the small nonlinear isolated wave and the reflected wave moving in the opposite direction.

When the weight of the excitation particle 420 is greater than the constituent particle P, the excitation particle 420 has an excessive inertia force that causes the excitation particle 420 to collide with the constituent particle P several times. Since a plurality of nonlinear isolated waves may be generated by applying an impact, the weight of the excitation particle 420 is preferably less than or equal to the weight of the constituent particles P.

The trigger part 433 may include, more specifically, a handle 433a, a trigger stand 433b, and a spring 433c for a trigger.

The handle 433a is fixed to the outer surface in the longitudinal middle portion of the guide tube 30 , and is formed to protrude in a direction crossing the guide tube 30 .

The trigger stand (433b) is fixed to the handle (433a) so as to be movable in a direction parallel to the guide tube (30), a trigger (T) is provided at the front end and a second magnet (M) is provided at the rear end. That is, the trigger stand (433b) passes through the handle (433a) and may be formed in the form of connecting the trigger (T) and the second magnet (M).

The trigger spring 433c is a compression spring, which is disposed between the trigger T and the handle 433a to press the trigger T in the direction of the tip of the trigger stand 433b.

The trigger part 433 is normally pressed in the direction of the tip end of the guide tube 30 by the trigger spring 433c, so that the second magnet M is in close contact with the first magnet 432a. And when the trigger (T) is pressed with a finger while holding the handle (433a), the trigger spring (433c) is compressed and the trigger part (433) moves in the direction of the rear end of the guide tube (30), and the trigger part (433) The connecting rod 432 including the first magnet 432a moves along with the second magnet M provided at the rear end.

This trigger unit 433 allows the non-destructive inspection device 1 according to the present invention to be easily operated with one hand. Accordingly, it is possible to easily proceed with the non-destructive inspection for the inspection object (2) located in a narrow place or high place.

It is preferable that the first magnet 432a and the second magnet M constituting the oscillation unit 430 are spaced apart from the constituent particles P by a distance where the magnetic force does not reach the constituent particles P. To this end, the connecting rod 432 connecting the excitation particle 420 and the first magnet 432a in contact with the constituent particles P of the last end may be formed to have a sufficiently long length.

In this case, it is possible to prevent the magnetic force of the first magnet 432a and the second magnet M from affecting the motion of the particle chain C.

The second magnet M is composed of an electromagnet or a plurality of permanent magnets so that the magnetic force can be adjusted.

In this case, the degree of compression of the spring 431 at the moment when the first magnet 432a and the second magnet M are separated from each other is adjusted so that the elastic force of the spring 431 to move the particles 420 can be adjusted. Therefore, as a result, the amount of energy that the excited particles 420 excite to the constituent particles P can be adjusted.

As shown in FIG. 8 , the tip of the constituent particles P constituting the particle chain C may be formed with a flat tip. The non-destructive inspection apparatus 1 of the present invention having such constituent particles P can be used when the surface of the inspection object 2 is made of a soft material.

The non-destructive inspection apparatus 1 according to the present invention performs a non-destructive inspection by measuring the reflected wave from the inspection object 2 after the constituent particles P at the front end of the particle chain C collide with the inspection object 2 . In the process, when the inspection object 2 is made of a soft material, the inspection object 2 may be deformed due to the collision of the constituent particles P with the inspection object 2, and by this deformation, the characteristics of the reflected wave may vary.

When the tip of the leading-most constituent particle (P) is formed flat, the load applied from the constituent particle (P) is concentrated because the constituent particle (P) and the inspection object (2) make surface contact rather than point contact when they collide. It is possible to prevent the inspection object 2 from being deformed.

The non-destructive testing apparatus 1 according to the present invention may further include a diagnostic unit 60 . 9 is an explanatory diagram of the diagnostic unit 60 .

The diagnostic unit 60 is connected to the sensor particle 20 and serves to determine the state of the test subject 2 by analyzing data obtained from the sensor particle 20 .

The diagnosis unit 60 may determine the state of the examination object 2 by extracting characteristics such as, for example, an amplitude ratio between the incident wave and the reflected wave, and a time difference between the incident wave and the reflected wave.

The diagnostic unit 60 may be, for example, a computer, a smartphone, or a tablet, and may receive data of the sensor particle 20 through wireless communication from the voltmeter 3 connected to the sensor particle 20 . The voltmeter 3 may convert the analog voltage signal of the sensor particle 20 into a digital signal and transmit it to the diagnostic unit 60 .

The diagnosis unit 60 may include a data unit 610 , a learning unit 620 , a diagnosis model storage unit 630 , and an analysis unit 640 .

The data unit 610 stores data obtained from the sensor particles 20 for each state of the inspection object 2 . That is, the data unit 610 stores numerous data related to the incident wave and the reflected wave according to the structure, material, degree of damage, and the like of the inspection object 2 .

The learning unit 620 learns the data stored in the data unit 610 using an artificial intelligence algorithm. Through learning, it is possible to extract the characteristics of the incident wave and the reflected wave according to the degree of damage of the inspection object 2 .

As an algorithm for learning data, for example, an artificial neural network (ANN), a support vector machine (SVM), a recurrent neural network (RNN), or a convolutional neural network (CNN) may be used.

The diagnosis model storage unit 630 stores a diagnosis model derived through learning in the learning unit 620 . In the diagnostic model, the characteristics of the incident wave and the reflected wave are shown according to the degree of damage of the test object 2 .

The analysis unit 640 analyzes new data obtained from the sensor particles 20 based on the diaphragm model to determine the state of the test subject 2 . That is, the state of the test subject 2 can be grasped by finding which feature of the diagnostic model corresponds to which feature of the new data.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms within the scope of the appended claims. Without departing from the gist of the present invention claimed in the claims, it is considered to be within the scope of the claims of the present invention to the extent that various modifications can be made by anyone skilled in the art to which the invention pertains.

1: Non-destructive testing device
10: spherical particle 20: sensor particle
30: guide tube 31: protrusion
40: excitation part 50: pre-compression member
60: diagnostic unit
210: sensing unit 220: contact unit
310: guide tube body 320: stopper
410: Excitation particle guide tube 420: Excitation particle
430: oscillation unit 431: spring
432: connecting rod 432a: first magnet
433: trigger part 433a: handle
433b: trigger stand 433c: trigger spring
610: data unit 620: learning unit
630: diagnostic model storage unit 640: analysis unit
C: particle chain M: second magnet
P : constituent particles S : guide space
T: trigger

Claims (16)

A plurality of spherical particles arranged in a line in contact with each other;
sensor particles arranged in a line with the spherical particles to form a particle chain;
a guide tube having a cylindrical shape forming a guide space including the particle chain and having a protrusion through which a portion of the constituent particles constituting the particle chain protrudes from a front end and a rear end; and
A non-linear isolated wave-based portable non-destructive testing device including a; fixed to the guide tube, and an excitation unit for applying an impact to the constituent particles located at the rearmost end.
The method of claim 1,
A non-linear isolated wave-based portable non-destructive testing device, characterized in that a pre-compression member for adhering the constituent particles to each other is provided at at least one of the front end and the rear end of the guide space.
3. The method of claim 2,
The non-linear isolated wave-based portable non-destructive testing device, characterized in that the pre-compression member is formed to be able to adjust the force for adhering the constituent particles.
4. The method of claim 3,
The guide tube is
A guide tube body formed in a cylindrical shape forming the guide space, and
and a stopper coupled to at least one of a front end and a rear end of the guide tube body and having the protrusion,
The pre-compression member is interposed between the end of the guide tube body and the stopper,
The stopper is a non-linear isolated wave-based portable non-destructive testing device, characterized in that screwed to the guide tube body.
According to claim 1,
A non-linear isolated wave-based portable non-destructive testing device, characterized in that a slit is provided on the wall of the guide tube.
According to claim 1,
The sensor particles are
A sensing unit having a cylindrical shape and provided with a sensor, and
A non-linear isolated wave-based portable non-destructive testing apparatus formed at both ends of the sensing unit and comprising a hemispherical contact unit.
According to claim 1,
The sensor particle, a non-linear isolated wave-based portable non-destructive testing device, characterized in that the two are spaced apart from each other.
According to claim 1,
The sensor particle is a non-linear isolated wave-based portable non-destructive testing device, characterized in that it is disposed at the front end of the guide space.
According to claim 1,
The excitation part,
An excitation particle guide tube fixed to the rear end of the guide tube,
Exciting particles disposed adjacent to the constituent particles at the last end of the guide tube in the excitation particle guide tube, and
Non-linear isolated wave-based portable non-destructive testing device comprising an oscillation unit for oscillating the excitation particle in the direction of the guide tube.
10. The method of claim 9,
The oscillation unit,
a spring that pushes the excited particles in the direction of the guide tube,
A connecting rod having a front end connected to the vibrating particle and having a first magnet at the rear end, and
Non-linear isolated wave-based portable non-destructive testing device comprising a second magnet and a trigger portion formed to be movable with respect to the first magnet.
11. The method of claim 10,
The trigger unit,
A handle fixed to the outer surface of the guide tube,
A trigger stand fixed to the handle so as to be movable in a direction parallel to the guide tube, the trigger being provided at the front end and the second magnet at the rear end, and
Non-linear isolated wave-based portable non-destructive testing device comprising a trigger spring for pressing the trigger in the direction of the tip of the trigger stand.
11. The method of claim 10,
The first magnet and the second magnet are non-linear isolated wave-based portable non-destructive testing apparatus, characterized in that the magnetic force is arranged to be spaced apart from the constituent particles by a distance that does not reach the constituent particles.
11. The method of claim 10,
The second magnet is composed of an electromagnet or a plurality of permanent magnets, and the magnetic force is controlled.
According to claim 1,
The non-linear isolated wave-based portable non-destructive testing device, characterized in that the one located at the most tip among the constituent particles is formed with a flat tip.
According to claim 1,
Non-linear isolated wave-based portable non-destructive testing device, characterized in that it further comprises a diagnostic unit connected to the sensor particle.
16. The method of claim 15,
The diagnostic unit,
A data unit storing data obtained from the sensor particles for each state of the inspection object;
a learning unit for learning the data stored in the data unit;
a diagnostic model storage unit storing the diagnostic model derived from the learning unit; and
and an analysis unit for analyzing the data obtained from the sensor particles based on the diagnostic model.

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