KR102489421B1 - Portable nondestructive inspection apparatus based on nonlinear solitary wave - Google Patents

Abstract

The present invention relates to a portable non-destructive testing device based on nonlinear isolated waves, comprising: a plurality of spherical particles disposed 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 pipe formed in a cylindrical shape forming a guide space including the particle chain and having protruding holes through which a part of the constituent particles constituting the particle chain protrudes at front and rear ends; and a vibrating unit that is fixed to the guide tube and applies an impact to the constituting particles located at the last end.
Accordingly, it is easy to carry and it is possible to perform non-destructive testing in various postures.

Description

Portable non-destructive testing device based on nonlinear isolated wave {PORTABLE NONDESTRUCTIVE INSPECTION APPARATUS BASED ON NONLINEAR SOLITARY WAVE}

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

As one type of non-destructive inspection device, there is an inspection device using a nonlinear isolated wave.

A non-linear isolated wave-based non-destructive inspection device has a chain structure composed of a large number of spherical particles as a main component. Through this chain structure, nonlinear isolated waves are stably propagated, and accurate test results can be obtained because the reflected waves that are reflected from the test specimen are sensitively changed according to the mechanical properties of the medium.

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 vertically inside the guide 10, and a plurality of spheres arranged vertically in the guide 10. Particles 2, excitation particles 1 that apply impact to the uppermost spherical particles, and sensors 3 disposed between the spherical particles 2, and the like.

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

However, since the conventional non-destructive testing device having the same structure as described above has no choice but to proceed with the test with the guide 10 standing on top of the test specimen 4, there is a limit to what can be inspected. , There is a disadvantage that is not easy to carry due to the structure of the guide 10 for maintaining the chain of spherical particles (10).

WO 2009100064 A2

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

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

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 pipe formed in a cylindrical shape forming a guide space including the particle chain and having protruding holes through which a part of the constituent particles constituting the particle chain protrudes at front and rear ends; and an excitation unit fixed to the guide tube and applying an impact to the component particles located at the last end.

At least one of the front and rear ends of the guide space may be provided with a pre-compression member for bringing the constituent particles into close contact with each other.

A force that the pre-compression member brings the constituent particles into close contact with may be formed to be adjustable.

The guide tube includes a guide tube body formed in 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, and the pre-compression member It is interposed between an end of the guide tube body and the stopper, and the stopper may be screwed to the guide tube body.

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

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

The sensor particles, two may be disposed spaced apart from each other.

The sensor particle may be disposed at the front end of the guide space.

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

The oscillating unit is provided with a spring for pushing the excitable particle in the direction of the guide tube, a linking table having a front end connected to the excitation particle and having a first magnet at a rear end, and a second magnet and moving relative to the first magnet. It may include a trigger part formed to be possible.

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

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

The second magnet may be composed of an electromagnet or a plurality of permanent magnets, and the magnetic force may be adjusted.

The front end of the particle positioned at the front end of the constituent particles may be formed flat.

A diagnostic unit connected to the sensor particle may be further included.

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

The non-linear isolated wave-based portable non-destructive testing device according to the present invention can be carried around and carry out non-destructive testing at various industrial sites other than laboratories, and can perform non-destructive testing regardless of the position or angle of the test subject.

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

The structural characteristics of the oscillation unit for oscillating excited particles facilitate 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 testing 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 portable non-destructive testing device based on nonlinear isolated waves according to the present invention;
4 is an explanatory diagram of a pre-compression member constituting a non-linear isolated wave-based portable non-destructive testing device according to the present invention;
5 and 6 are explanatory diagrams of sensor particles constituting the portable non-destructive testing device based on nonlinear isolated waves according to the present invention;
7 is an explanatory diagram of an excitation unit constituting a non-linear isolated wave-based portable non-destructive testing device according to the present invention;
8 is an explanatory diagram of a case in which the tip of a particle located at the foremost end of the constituent particles constituting a portable non-destructive testing device based on nonlinear isolated waves according to the present invention is formed flat;
9 is an explanatory diagram of a diagnosis unit constituting a non-linear isolated wave-based portable non-destructive testing device 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 portable non-destructive testing device 1 based on nonlinear isolated waves according to the present invention, and FIG. 3 is a cross-sectional view of a portable non-destructive testing device 1 based on nonlinear isolated waves according to the present invention.

The nonlinear isolated wave-based portable non-destructive testing device 1 according to the present invention includes a plurality of spherical particles 10, sensor particles 20, a guide tube 30, and a vibrating unit 40, and has an overall shape 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 a metal material such as, for example, stainless steel.

The sensor particles 20 are arranged in a 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 end of the particle chain C.

The spherical particles 10 and the sensor particles 20 constituting the particle chain C may be placed 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 of the contact portion with respect to the spherical particle 10 as much as possible with the spherical particle 10 so that the characteristics of the wave do not change. It is desirable to form

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

The guide tube 30 is made of a long cylindrical shape, and includes a guide space S extending along the longitudinal direction therein, including the spherical particles 10 and the sensor particles 20 in the guide space S. A particle chain (C) is positioned. The diameter of the guide space (S) may be formed slightly larger than the diameter of the constituent particles (P).

Protrusions 31 having a smaller diameter 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 at the foremost and last ends of the particle chain C may protrude partially to the outside while being positioned within the guide space S. Accordingly, the foremost constituting particle P may come into contact with the inspection target 2, and the last constituting particle P may receive an impact from the outside of the guide tube 30.

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

In the non-linear isolated wave-based portable non-destructive testing device 1 of the present invention, while the state in which the particle chains C are arranged in a row within the guide tube 30 is maintained, the foremost and last parts are outside the guide tube 30 It can protrude into, it is possible to apply the impact applied from the excitation unit 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 position the guide tube (30) is placed.

Accordingly, it is possible to conduct non-destructive testing in various industrial sites other than a laboratory while carrying the non-linear isolated wave-based portable non-destructive testing device 1 according to the present invention, and it is related to the position or angle of the inspection target 2 Non-destructive testing can be performed without

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

The pre-compression member 50 is disposed at at least one of the front and rear ends of the guide space S in the guide tube 30 to serve 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 one end. By pressing with the direction end, the component particles (P) can always maintain a close contact state, 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 silicon and may be interposed between the innermost inner wall of the guide space S and the constituent particles P. The pre-compression member 50 is composed of the constituent particles P so that the constituent particles P located at the most end are not prevented from contacting the excitation part 40 or the inspection target 2 by the pre-compression member 50. It may be made of a ring shape through which a part can pass.

The force that the pre-compression member 50 brings into close contact with the constituent particles P may be formed to 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. The isolated wave can be 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 be able to adjust the adhesion between the constituent particles (P) through a method intervening.

More specifically, the guide tube body 310 is made of a cylindrical shape forming a guide space (S), the stopper 320 is coupled to at least one of the front and rear ends of the guide tube body 310, and the protrusion 31 ) is provided. In FIG. 4 , a 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 capable of covering the end of the guide tube body 310, and a screw thread is formed on the outer circumferential surface of the end of the guide tube body 310 and the inner circumferential surface of the stopper 320, so that the guide tube body 310 And the stopper 320 may be screwed together.

In addition, the pre-compression member 50 is interposed between the end of the guide tube body 310 and the stopper 320, and the pre-compression member 50 is disposed along the length of the stopper 320 coupled with the guide tube body 310. 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 together can easily adjust the coupling length by rotating the stopper 320, and as a result, the adhesion between the constituent particles P can be easily adjusted.

Since the excitation part 40 for applying an impact to the final constituent particles P is located at the rear end of the guide tube 30, the stopper 320 screwed to the guide tube body 310 is the guide tube body ( 310) is preferably located in the direction of the front end.

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

The sensor particle 20 may include a sensing unit 210 and a contact unit 220 . 5 shows an explanatory view of such a sensor particle 20.

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

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

In the existing non-destructive testing device using nonlinear 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 particle and the propagation direction of the nonlinear isolated wave changed according to the position of the sensor particle, resulting in sensing results. There was a problem with inaccuracies.

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 therefore the piezoelectric material 211 of the sensor particle 20 propagates a nonlinear isolated wave. Since it is always perpendicular to the direction, it is possible to obtain accurate sensing results. And this is particularly effective for the non-destructive testing device 1 of the present invention, which is portable and can be used at 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 sensor particle 20 portion. To this end, the sensor particles 20 are formed to have the same mass and contact stiffness as those of the spherical particles 10 . The contact portion 220 contacting the spherical particle 10 may be formed to have the same curvature and physical properties as the spherical particle 10 and may have the same contact stiffness as the spherical particle 10 .

The piezoelectric material 211 is preferably formed with a smaller diameter than the diameter of the main body of the sensing unit 210 so as 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 in the piezoelectric material 211 can be measured.

A slit (not shown) may be formed in the wall of the guide tube 30 so that the sensor particle 20 and the external voltmeter 3 can be connected through the signal line W. The slit may be formed long along the longitudinal direction of the guide pipe 30, for example.

The slit of the guide tube 30 may be closed by the cover 70. Accordingly, it is possible to minimize the influence on the result of the inspection by introducing foreign matter into the guide tube 30 through the slit. The cover 70 may be formed in an arc shape with a cross section of more than 180 degrees and be fitted and fixed to the outer surface of the guide tube 30 . The cover 70 may be made of a transparent material so that the inner state 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 particle 20 may be disposed with two 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 abnormalities in the non-destructive testing device 1 can be confirmed according to the state of the particle chain (C).

In addition, 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 determining the object 2 to be inspected.

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 .

As shown in (b) of FIG. 6, the sensor particle 20 may be disposed at the front end of the guide space (S). Since these sensor particles 20 are in contact with the test target 2, the contact force between the sensor particle 20 and the test target 2 can be measured, and the measured contact force-related signal analyzes the state of the test target 2. can be used as additional data.

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

The excitable particle 420 is disposed adjacent to the constituting particle P at the last end of the guide tube 30 within the excitation particle guide tube 410 . A part of the particle P at the end of the guide tube 30 protrudes out of the guide tube 30 through the protruding hole 31, so that it can come into contact with the particle 420. The weight of the excitation particle 420 may be less than or equal to the weight of the component particle P. The diameter of the excitable particle 420 is formed according to the inner diameter of the exciter particle guide tube 410, so that the exciter particle 420 can move in a straight line along the particle guide tube 410.

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

More specifically, the oscillating unit 430 includes a spring 431 , a connection table 432 and a trigger unit 433 .

The spring 431 is a compression spring, and serves to push the particle 420 toward the guide tube 30 by being disposed behind the particle 420 in the guide tube 410 of the particle guide. The spring 431 can push the excitation particle 420, but cannot pull the excitation particle 420 because it is not bonded to the excitation particle 420.

The connecting rod 432 is a rod-shaped member disposed inside the particle guide tube 410, and the front end is connected to the particle 420 and the rear end protrudes outward from the rear end of the particle guide tube 410. 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 particle guide pipe 410. The rear end of the spring 431 is connected to the spring support 434. The connector 432 may protrude outward from the particle 420 guide tube 410 having a rear end through the spring support 434 .

The trigger unit 433 includes a second magnet M generating an attractive force with the first magnet 432a, and is formed to be movable relative to the first magnet 432a.

The oscillator 430 may operate as follows.

Normally, as shown in (a) of FIG. 6, the oscillating unit 430, in a state in which the spring 431 is completely relaxed, the rear end of the connecting rod 432 and the trigger unit 433 are connected to the first magnet 432a. And is located in a state of contact by the second magnet (M). At this time, the excitation particle 420 contacts the last constituent particle P of the guide tube 30, but is positioned in a state in which the constituent particle P is not pressed.

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

When the trigger unit 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. So the first magnet 432a and the second magnet M are separated, and the particles 420 with the elastic force of the spring 431 move quickly toward the front end of the guide tube 410 with the guide tube 30 ) impact is applied to the final constituent particle (P).

When the particle with excitation 420 contacts the particle P at the end of the guide tube 30, the spring 431 is in a completely relaxed state and the particle with excitation 420 is not bonded to the spring 431, Only the inertial force of the excitation particle 420 can have an effect on the nonlinear isolated wave generated when the excited particle 420 is oscillated and collides with the particle P at the end of the guide tube 30, and the spring 431 Elasticity has no effect.

After the excitation particle 420 collides with the particle P at the last end of the guide tube 30 to generate a nonlinear isolated wave, the vibration of the spring 431 causes the excitation particle 420 to vibrate, resulting in a minute nonlinear isolated wave. may occur, but since the time difference between the firstly generated nonlinear isolated wave and the subsequent minute nonlinear isolated wave is significantly greater 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 grasping the direction of the minute nonlinear isolated wave through the two sensor particles 20, it is possible to distinguish the minute nonlinear isolated wave from the reflected wave moving in the opposite direction.

When the weight of the excitable particle 420 is greater than the component particle P, the particle 420 and the component particle P collide with each other several times due to the excessive inertial force of the exciter particle 420. Since an impact may be applied to generate a plurality of nonlinear isolated waves, the weight of the excitation particle 420 is preferably smaller than or equal to the weight of the component particle P.

More specifically, the trigger unit 433 may include a handle 433a, a trigger stand 433b, and a trigger spring 433c.

The handle 433a is fixed to the outer surface of the guide tube 30 in the middle in the longitudinal direction and protrudes 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, and a trigger T is provided at the front end and a second magnet M is provided at the rear end. That is, the trigger rod 433b may pass through the handle 433a and connect the trigger T and the second magnet M.

The trigger spring 433c is a compression spring and is disposed between the trigger T and the handle 433a to press the trigger T toward the front end of the trigger rod 433b.

The trigger part 433 is normally pressed toward the front 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 you hold the handle 433a and press the trigger T with your finger, the trigger spring 433c is compressed and the trigger part 433 moves toward the rear end of the guide pipe 30, and the trigger part 433 The connecting rod 432 having the first magnet 432a moves together along the second magnet M provided at the rear end.

This trigger unit 433 allows the non-destructive testing device 1 according to the present invention to be easily operated with one hand. Accordingly, non-destructive testing can be easily performed on the inspection target 2 located in a narrow place or a high place.

It is preferable that the first magnet 432a and the second magnet M constituting the oscillating unit 430 be spaced apart from the constituent particles P by a distance at which magnetic force does not reach the constituent particles P. To this end, the connecting rod 432 connecting the first magnet 432a and the excitation particle 420 contacting the last component particle P may be formed with 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 movement of the particle chain C.

The second magnet (M) is composed of an electromagnet or a plurality of permanent magnets can be adjusted in magnetic force.

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 for moving the particles 420 can be adjusted. Therefore, as a result, the amount of energy that the excitation particle 420 excites to the component particle P can be adjusted.

As shown in FIG. 8, the front end of the particle chain (C), which is located at the front end among the constituent particles (P), may be formed flat. The non-destructive inspection device 1 of the present invention having such constituent particles P may be used when the surface of the inspection target 2 is made of a soft material.

The non-destructive testing device 1 according to the present invention performs non-destructive testing by measuring the reflected wave from the test target 2 after the particle chain P at the foremost end of the particle chain C collides with the test target 2. In progress, when the inspection target 2 is made of a soft material, the inspection target 2 may be deformed due to the collision of the constituent particles P with the inspection target 2, and the characteristic of the reflected wave is changed by this deformation. It can vary.

If the front end of the foremost 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 colliding. It is possible to prevent the inspection target 2 from being deformed.

The non-destructive testing device 1 according to the present invention may further include a diagnosis unit 60 . 9 shows an explanatory view of the diagnosis unit 60.

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

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

The diagnosis unit 60 may be, for example, a computer, a smartphone or a tablet, and may receive data of the sensor particle 20 from the voltmeter 3 connected to the sensor particle 20 through wireless communication. The voltmeter 3 may convert the analog voltage signal of the sensor particle 20 into a digital signal and transmit it to the diagnosis 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 target 2 . That is, the data unit 610 stores a lot of data related to the incident wave and the reflected wave according to the structure, material, degree of damage, etc. of the inspection target 2 .

The learning unit 620 learns data stored in the data unit 610 using an artificial intelligence algorithm. Through learning, characteristics of the incident wave and the reflected wave may be extracted for each degree of damage of the inspection target 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 derived through learning in the learning unit 620 is stored in the diagnostic model storage unit 630 . In the diagnostic model, the characteristics of the incident wave and the reflected wave are shown for each degree of damage of the inspection target 2 .

The analysis unit 640 analyzes new data obtained from the sensor particle 20 based on the Jindal model to determine the state of the test target 2 . That is, the state of the test target 2 can be grasped by finding which feature of the diagnostic model corresponds to the 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 of embodiments within the scope of the appended claims. Anyone with ordinary knowledge in the art to which the invention pertains without departing from the subject matter of the invention claimed in the claims is considered to be within the scope of the claims of the present invention to various extents that can be modified.

1: Non-destructive testing device
10: spherical particle 20: sensor particle
30: guide tube 31: protrusion
40: excitation part 50: pre-compression member
60: diagnosis unit
210: sensing unit 220: contact unit
310: guide tube body 320: stopper
410: excitation particle guide tube 420: excitation particle
430: oscillation part 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 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
A vibrating unit fixed to the guide tube and applying an impact to the constituent particles located at the last end; includes,
The part with the
A particle guide tube with excitation fixed to the rear end of the guide tube;
A particle with excitation disposed adjacent to the constituent particles at the end of the guide tube in the particle guide tube with excitation; and
An oscillation unit for oscillating the excited particles in the direction of the guide tube;
The oscillation part,
A spring for pushing the excitable particles in the direction of the guide tube;
A connecting rod having a front end connected to the excitation particle and having a first magnet at the rear end, and
A nonlinear 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.
According to claim 1,
Nonlinear isolated wave-based portable non-destructive testing device, characterized in that at least one of the front and rear ends of the guide space is provided with a pre-compression member for bringing the constituent particles into close contact with each other.
According to claim 2,
The nonlinear isolated wave-based portable non-destructive testing device, characterized in that the force of the pre-compression member to bring the constituent particles into close contact is formed to be adjustable.
According to claim 3,
The guide pipe,
A guide tube body formed in a cylindrical shape forming the guide space, and
A stopper coupled to at least one of the front and rear ends 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 nonlinear isolated wave-based portable non-destructive inspection device, characterized in that screwed to the guide tube body.
According to claim 1,
Nonlinear isolated wave-based portable non-destructive testing device, characterized in that the wall of the guide tube is provided with a slit.
According to claim 1,
The sensor particle,
A sensing unit having a cylindrical shape and equipped with a sensor, and
Nonlinear isolated wave-based portable non-destructive testing device, characterized in that it comprises a contact portion formed at both ends of the sensing portion and formed in a hemispherical shape.
According to claim 1,
The sensor particles are non-linear isolated wave-based portable non-destructive inspection device, characterized in that the two are disposed spaced apart from each other.
According to claim 1,
The sensor particle is a non-linear isolated wave-based portable non-destructive inspection device, characterized in that disposed at the front end of the guide space.
delete delete According to claim 1,
The trigger part,
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, having a trigger at the front end and having the second magnet at the rear end, and
Nonlinear isolated wave-based portable non-destructive inspection device, characterized in that it comprises a trigger spring for pressing the trigger in the direction of the front end of the trigger bar.
According to claim 1,
The first magnet and the second magnet are nonlinear isolated wave-based portable non-destructive testing apparatus, characterized in that disposed apart from the constituent particles by a distance at which magnetic force does not reach the constituent particles.
According to claim 1,
The second magnet is a nonlinear isolated wave-based portable non-destructive inspection device, characterized in that the magnetic force is adjusted by consisting of an electromagnet or a plurality of permanent magnets.
According to claim 1,
The nonlinear isolated wave-based portable non-destructive testing device, characterized in that the front end of the constituent particles is formed flat.
According to claim 1,
Nonlinear isolated wave-based portable non-destructive testing device further comprising a diagnosis unit connected to the sensor particle.
According to claim 15,
The diagnosis unit,
A data unit storing data obtained from the sensor particles for each state of the inspection target;
a learning unit for learning the data stored in the data unit;
A diagnostic model storage unit in which the diagnostic model derived from the learning unit is stored; and
Nonlinear isolated wave-based portable non-destructive testing device, characterized in that it comprises an analysis unit for analyzing the data obtained from the sensor particle based on the diagnostic model.

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