Nondestructive Testing Apparatus

Abstract

The present invention relates to a non-destructive inspection device comprising: a housing having slide holes formed on opposing surfaces; a slide rod that slides through the slide holes and slides within the housing, a striking member including a sensor part at the end of the slide rod and a striking head on the outside of the sensor part; a driving key including a diaphragm mounted on the slide rod and a roller formed on one side of the diaphragm; a cam that rotates in conjunction with a motor and has a key projection formed thereon so that the slide rod, which is integrally linked with the driving key by the linkage of the key projection and the roller, slides within the housing; a pair of springs configured on both sides of the diaphragm in the housing; and a control module including a control part that receives a sensing value from the striking member and a data part that receives and stores the sensing value from the control part; wherein a second slide hole is formed inside the housing with a gap between each slide hole and through which the slide rod passes, and a support end with a spring mounted thereon is formed on the inside of each slide hole.

Description

Technology Field

[0001] The present invention relates to a non-destructive inspection device for structures. Background Technology

[0003] Various technologies are being proposed to assess the safety or current condition of structures and take follow-up measures if abnormalities are found. Among these, non-destructive testing methods that can inspect existing structures while maintaining their original form without dismantling or damaging them are becoming increasingly popular.

[0004] As a convenient method for non-destructive testing of structures, a method that determines structural abnormalities by analyzing the reverberation generated after striking the object under test with a striking rod is widely used.

[0005] As an example of such prior art, Korean Patent Registration No. 10-2214561 presents a non-destructive testing device applying an impact echo technique comprising a surface sensor, an impact device, and a signal analyzer, wherein the surface sensor acquires a stress wave caused by an impact and transmits it to the signal analyzer, and the impact device is coupled with an impact signal detection device that detects vibration when the impact device strikes an object to be inspected, and the signal analyzer analyzes and processes the stress wave acquired through the surface sensor and the signal acquired by the impact signal detection device together.

[0006] However, in the case of the above technology, since it is manual, it is not easy to ensure verticality during impact, so there is a problem in that the accuracy of the inspection cannot be guaranteed. Prior art literature

[0008] Republic of Korea Patent Registration No. 10-2214561 The problem to be solved

[0009] The present invention has been devised to solve the above-mentioned problems and aims to provide a non-destructive inspection device capable of ensuring reliability by securing accurate data through a simple configuration. means of solving the problem

[0011] As a means to solve the aforementioned problems, the non-destructive inspection device of the present invention (hereinafter referred to as "the device of the present invention") comprises: a housing having slide holes formed on opposing surfaces; a slide rod that slides through the slide holes and slides within the housing, a striking member including a sensor part at the end of the slide rod and a striking head on the outside of the sensor part; a driving key including a diaphragm mounted on the slide rod and a roller formed on one side of the diaphragm; a cam that rotates in conjunction with a motor and has a key projection formed thereon so that the slide rod, which is integrally linked with the driving key by the linkage of the key projection and the roller, slides within the housing; a pair of springs configured on both sides of the diaphragm in the housing; and a control module including a control unit that receives a sensing value from the striking member and a data unit that receives and stores the sensing value from the control unit; wherein a second slide hole is formed inside the housing, through which the slide rod passes while forming a gap between each slide hole, and a support end with a spring mounted thereon is formed on the inside of each slide hole.

[0012] delete

[0013] As an example, the housing is configured with a slide hole, and the driving key is further characterized by having a guide member configured such that the guide member protrudes from one side of the diaphragm and has a guide projection at its end that is inserted into the slide hole and slides within the slide hole.

[0014] As an example, a guide is further configured at the end of the housing to induce a vertical strike on the surface of the structure of the striking ball, wherein the guide is composed of a guide bar protruding in four axes from the housing and a contact sensor at the end of the guide bar, and the control unit controls the motor to drive the cam when a contact signal with the surface of the structure is output from the contact sensor in four axes.

[0015] As an example, it is characterized by further comprising an elastic means between the guide bar and the contact sensor.

[0016] As one example, the roller comprises a connecting plate protruding from one side of the diaphragm, a first roller rotatably mounted on the connecting plate, and a second roller rotatably mounted on the connecting plate while forming a gap with the first roller, and is further characterized by having a guide tube placed between the first roller and the second roller while connecting each support end.

[0017] As an example, a high-pressure air supply means is further configured, and the guide tube is characterized in that one end is connected to a spray nozzle configured on one side of the housing, and a high-pressure air discharge tube connected to the high-pressure air supply means is connected to the other side of the guide tube.

[0018] As one example, the above-described spray nozzle is characterized by comprising a straight pipe portion protruding from the housing, a discharge pipe portion connected to the end of the straight pipe portion so as to be rotatable by a bearing and having a curved pipe shape from which high-pressure air is discharged, and a brush portion composed of a mounting ring at the end of the discharge pipe portion and a plurality of fibers connected to the end of the mounting ring. Effects of the invention

[0020] As explained above, the device of the present invention has the advantage of enabling accurate non-destructive inspection through eccentric control, etc.

[0021] In addition, the device of the present invention has the advantage of ensuring data accuracy by inducing a vertical impact on the surface of the structure. Brief explanation of the drawing

[0023] FIG. 1 is a schematic diagram showing an apparatus of the present invention. FIG. 2 is an operating state diagram of the device shown in FIG. 1. FIG. 3 is a drawing showing an embodiment of the present invention. FIG. 4 is an operating state diagram of a control module as one configuration of the present invention. FIG. 5 is a side cross-sectional view showing another embodiment of the present invention. FIGS. 6 and FIGS. 7 are drawings according to one embodiment of the spray nozzle shown in FIGS. 5. Specific details for implementing the invention

[0024] Hereinafter, the structure and operation of the present invention will be explained in more detail with reference to the attached drawings. In describing the present invention, terms and words used in this specification and claims must be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to describe his invention in the best way possible.

[0026] The device (1) of the present invention comprises: a housing (2) having slide holes (21) formed on opposite surfaces; a slide rod (31) that slides through the slide holes (21) and slides in the housing (2); a striking ball (3) including a sensor part (32) at the end of the slide rod (31) and a striking head (33) on the outside of the sensor part (32); a driving key (4) including a diaphragm (41) mounted on the slide rod (31) and a roller (42) formed on one side of the diaphragm (41); a cam (5) that rotates in conjunction with a motor (51) and has a key projection (53) formed thereon to enable the slide rod (31), which is integrally linked with the driving key (4) by the linkage of the key projection (53) and the roller (42), to slide in conjunction in the housing (2); and a pair of springs (6) configured on both sides of the diaphragm (41) in the housing (2). It is characterized by including a control module (7) comprising a control unit (71) that receives a sensing value from the striking ball (3) and a data unit (72) that receives and stores the sensing value from the control unit (71).

[0027] The above housing (2) has slide holes (21) formed on each side so that the slide rod (31) passes through the striking ball (3) and each end is exposed, and in particular, the sensor part (32) and the striking head (33) are exposed on one side.

[0028] The above housing (2) is shown in the drawing as a rectangular container shape, but is not limited thereto.

[0029] The above driving key (4) is characterized by including a diaphragm (41) mounted on the slide rod (31) and a roller (42) formed on one side of the diaphragm (41).

[0030] The above diaphragm (41) is fixed to the slide rod (31) and is configured to move in conjunction with the slide rod (31).

[0031] The roller (42) moves in conjunction with the rotation of the cam (5) to slide the drive key (4) to one side, and the diaphragm (41) compresses the rear spring (62) as shown in FIG. 2 during this process, and as described below, when the pressure on the roller (42) by the key projection (53) is released due to the continued rotation of the cam (5), the restoring force of the rear spring (62) is applied, causing the drive key (4) to slide to the other side and the slide rod (31) to slide toward the surface of the structure.

[0032] Additionally, the housing (2) is configured with a slide hole (22), and the driving key (4) is further configured with a guide member (43) that protrudes from one side of the diaphragm (41) and has a guide projection (431) inserted into the slide hole (22) at its end and slides within the slide hole (22).

[0033] This configuration controls the eccentricity applied to the slide rod (31) that is integrally linked with the drive key (41).

[0034] In order to control friction, the slide ball (21) and the second slide ball (81) described below must be configured to be larger than the diameter of the slide rod (31). During the interlocking process of the cam (5) and the roller (42), the slide rod (31) may be compressed and restored with eccentricity applied in the slide ball (21) and the second slide ball (81). Since impact caused by such eccentricity hinders the derivation of accurate data and may cause equipment failure, the present invention controls such eccentricity through the interlocking of the slide hole (22) and the guide ball (43).

[0035] The above spring (6) is configured on both sides of the diaphragm (41), and the compressive and restoring force of the spring (6) causes the slide rod (31) to slide in conjunction and strike the surface of the structure.

[0036] To this end, a second slide hole (81) through which the slide rod (31) passes is formed in the interior of the housing (2) with a gap formed in each slide hole (21), and a support end (8) with a spring (6) mounted on the inside is formed.

[0037] The slide rod (31) is slid while its position is fixed inside the housing (2) by the support member (8), and the spring (6) is compressed and restored by the support of the support member (8).

[0038] The above-mentioned striking device (3) includes a slide rod (31) that slides in the housing (2), a sensor part (32) at the end of the slide rod (31), and a striking head (33) on the outside of the sensor part (32). As shown in FIG. 2, the diaphragm (41) strikes the surface of the structure (S) by means of compression and restoring force of the rear spring (62) by means of the aforementioned operating mechanism.

[0039] The above-mentioned striking ball (3) slides in the housing (2) by the aforementioned operating mechanism, causing the striking head (33) to strike the surface of the structure (S), and the rebound distance and other values ​​for such striking are obtained by the sensor unit (32). The data sensed by the sensor unit (32) is stored in the data unit (72) via the control unit (71). Although the data stored in the data unit (72) is not shown in the drawing, it is used as data for analyzing the non-destructive strength of the structure, etc., on a central server, etc.

[0040] Since various known analysis methods can be applied to calculate the non-destructive strength of the structure based on this data, a detailed explanation is omitted.

[0041] The above cam (5) rotates in conjunction with the motor (51) and has a key projection (53) protruding to one side formed thereon, and as shown in FIG. 2, the driving key (4) slides in conjunction with the slide rod (31) through the linkage between the key projection (53) and the roller (42). As previously mentioned, the driving key (4) slides in conjunction with the striking head (33) to strike the striking ball (3), and the rebound distance of the strike is sensed by the sensor unit (32).

[0042] In addition, after impact, it is returned to its original position by the restoring force of the spring (6), and this operating mechanism is repeated by the rotation of the cam (5) to periodically strike the surface of the structure.

[0043] In addition, the present invention presents an embodiment in FIG. 3 that ensures the accuracy of data regarding rebound distance, etc., by ensuring that when the surface of the structure (S) is struck by the striking ball (3), the surface of the structure (S) and the striking ball (3) are struck perpendicularly or nearly perpendicularly. When the striking ball (3) strikes the surface of the structure (S) in a tilted direction, the measurement of the rebound distance is performed in a tilted direction, and as a result, errors may occur in data analysis. The following embodiment aims to solve this problem.

[0044] In this embodiment, as shown in FIG. 3, a guide member (9) is further configured on one side of the housing (2) to induce a vertical strike on the surface of the structure (S) of the striking member (3), and the guide member (9) is characterized by being composed of a guide bar (91) protruding in four axes from the housing (2) and a contact sensor (92) at the end of the guide bar (91).

[0045] As seen in the drawing, guide bars (91) are each protruded in four axes toward the surface of the structure (S) in the drawing from the periphery of the slide hole (21) in the direction in which the sensor part (32) and the striking head (33) are exposed as one side of the housing (2).

[0046] In addition, a contact sensor (92) is configured at the end of each guide bar (91), so that when each contact sensor (92) comes into contact with the surface of the structure (S), a condition is formed in which the striking ball (3) can strike while maintaining a verticality. To this end, when the contact signal with the surface of the structure (S) is output from the four axes of contact sensors (92), the control unit (71) controls the motor (51) to drive the cam (5), thereby causing the striking by the aforementioned striking ball (3) to occur.

[0047] That is, the control unit (71) ensures that a strike is made to the surface of the structure (S) of the striking ball (3) only when a contact signal with the surface of the structure (S) is output from all four axes of the contact sensors (92).

[0048] The above contact sensor (92) outputs a signal only when in contact with the surface of the structure (S) so that the output signal is transmitted to the control unit (71), and the control unit (71) causes the striking ball (3) to strike only when the output signals of all contact sensors (92) are transmitted.

[0049] Since there are various known sensors for the above contact sensor (92), a detailed description thereof is omitted.

[0050] Meanwhile, there are cases where the surface of the structure (S) is not a perfectly smooth surface, in which case even if adjusted manually, all four axes of the contact sensors (92) may not come into contact with the surface of the structure (S). Accordingly, the present invention provides an example in which an extension means (93) is further configured between the guide bar (91) and the contact sensors (92).

[0051] If the surface of the structure (S) is not smooth due to the expansion means (93), the position is adjusted manually to first align it, and then advanced slightly secondarily. The expansion means (93) corrects the grooves and protrusions on the surface of the structure (S) so that all four contact sensors (92) come into contact with the surface of the structure (S), and the control unit (71) can operate the striking ball (3).

[0052] In addition, this expansion means (93) is designed to mitigate the impact applied to the contact sensor (92) during the contact process with the structure (S), thereby enabling a function that improves durability.

[0053] The above-mentioned expansion means (93) may be applied to various known structures, and for example, FIG. 3 shows an example in which the end of the guide bar (91) and the contact sensor (92) are connected by a spring, and the spring is embedded in an outer shell of elastic material.

[0054] Meanwhile, in the present invention, Figure 5 shows an example in which, in the upper part of the driving key (4), eccentricity is controlled by a guide member (43) that interacts with the slide hole (22) of the housing (2) in the drawing, and additionally, eccentricity is controlled in the lower part as well.

[0055] In this embodiment, the roller (42) is first configured to consist of a connecting plate (421) protruding from one side of the diaphragm (41), a first roller (422) rotatably mounted on the connecting plate (421), and a second roller (423) rotatably mounted on the connecting plate (421) while forming a gap from the first roller (422).

[0056] In the drawing, a connecting plate (421) protrudes downward from the diaphragm (41), and the first roller (422) and the second roller (423) are each mounted so as to be rotatable while forming a gap in the upper and lower directions on the connecting plate (421).

[0057] In addition, a guide tube (12) is further configured to be placed between the first roller (422) and the second roller (423) while connecting each support member (8).

[0058] The guide tube (12) is configured to connect the support members (8) and is configured to be parallel to the slide hole (22) and the slide rod (31). With the guide tube (12) configured in this way, the driving key (4) is configured so that the guide tube (12) is positioned between the first roller (422) and the second roller (423) in the downward direction of the drawing, thereby enabling slide interlocking.

[0059] The linkage between the aforementioned drive key (4) and cam (5) is made to be achieved by the second roller (423).

[0060] In this way, the driving key (4) and the slide rod (31) that slides together with it are guided by a guide member (43) that slides together with the slide hole (22) of the housing (2) in the upper direction of the drawing, and are guided by a guide tube (12), a first roller (422), and a second roller (423) in the lower direction, thereby further reducing the eccentricity of the slide rod (31) during the sliding process, so that a more accurate sensing value can be obtained and device failure due to wear, etc. can be reduced.

[0061] In addition, the present invention provides an example in FIG. 5, etc., that allows for the removal of foreign substances from the surface of the structure (S) to be struck by the striking ball (3), thereby enabling the derivation of more accurate sensing values.

[0062] In this embodiment, as shown in FIG. 5, the housing (2) is further configured with a high-pressure air supply means (10), and the guide tube (12) is connected at one end to a spray nozzle (13) configured on one side of the housing (2), and the high-pressure air discharge tube (11) connected to the high-pressure air supply means (10) is connected to the other side of the guide tube (12).

[0063] The above guide tube (12) is used as a means of the aforementioned guide, and at the same time, is made to function as a means of transporting high-pressure air supplied by the high-pressure air supply means (10).

[0064] The above high-pressure air supply means (10) is a means for generating and supplying high-pressure air, and various known technologies can be applied. Although the drawing shows an example in which the high-pressure air supply means (10) is configured inside the housing (2), it is not limited thereto and can also be configured outside the housing (2).

[0065] In this embodiment, as shown in the drawing, the guide tube (12) is connected at one end to a spray nozzle (13) configured in the housing (2) by passing through the support end (8), and at the other end to a high-pressure air discharge tube (11) at the support end (8) on the other side.

[0066] In the drawing, an example is presented in which the spray nozzle (13) is configured in an upward curved tube shape so that high-pressure air discharged by the spray nozzle (13) is discharged to the surface of a structure (S) facing the location where it is struck by the striking member (3), thereby removing foreign matter (m) at that location.

[0067] In addition, FIG. 7 presents an embodiment that further increases the removal efficiency of foreign substances over a wider area.

[0068] In this embodiment, the structure is the same as that shown in FIG. 5, but the structure of the spray nozzle (13) is different, so only the spray nozzle (13) will be described below.

[0069] The spray nozzle (13) of the present embodiment is characterized by comprising a straight pipe section (131) protruding from the housing (2), a discharge pipe section (133) which is rotatably connected by a bearing (132) at the end of the straight pipe section (131) and discharges high-pressure air at the end in a curved pipe shape while forming an inclined gradient, and a brush section (134) composed of a mounting ring (134-1) at the end of the discharge pipe section (133) and a plurality of fibers (134-2) at the end of the mounting ring (134-1).

[0070] The above-mentioned straight section (131) is configured to be connected to the guide tube (12) as shown in the drawing.

[0071] The discharge pipe section (133) is connected to the end of the straight pipe section (131) by a bearing (132), and is particularly configured in a curved pipe shape so that, during the process in which high-pressure air introduced through the straight pipe section (131) is discharged through the discharge pipe section (133), the discharge pipe section (133) rotates in conjunction with the straight pipe section (131) as an axis according to the discharge direction of the high-pressure air.

[0072] Preferably, as seen in the drawing, the discharge pipe section (133) is configured in a curved pipe shape and has a shape in which the diameter decreases toward the end, and at the same time, the opening at the end forms an inclined gradient so that high-pressure air is discharged while forming an inclined gradient, thereby making it easy to rotate the discharge pipe section (133).

[0073] In this way, high-pressure air is discharged over a wider area by rotating the discharge pipe (133), making it possible to clean a wider area of ​​the surface of the structure (S).

[0074] In addition, the discharge pipe section (133) is configured with a brush section (134), and when the discharge pipe section (133) rotates due to the discharge of high-pressure air, centrifugal force is applied to the plurality of fibers (134-2) formed in the brush section (134), so that the plurality of fibers (134-2) sweep the surface of the structure (S), and in addition to the high-pressure air, it is possible to remove foreign substances by the fibers (134-2).

[0075] The above brush portion (134) is configured such that a mounting ring (134-1) is mounted at the end of the discharge pipe portion (133) to fix the brush portion (134) to the end of the discharge pipe portion (133), and a plurality of fibers (134-2) are configured throughout the entire mounting ring (134-1) so that when centrifugal force is applied as previously mentioned, the plurality of fibers (134-2) sweep the surface of the structure (S) in a tubular shape with an increasing diameter. Inside the tubular shape formed by the fibers (134-2), high-pressure air discharged from the discharge pipe portion (133) strikes the surface of the structure (S), thereby allowing foreign substances that are easily detached from the surface of the structure (S) by the impact of the high-pressure air to be swept away and removed by the fibers (134-2).

[0076] As shown in FIG. 6, after cleaning is performed, the multiple fibers (134-2) in the discharge pipe (133) are stretched downward due to their own weight, so they do not interfere with the impact of the striking ball (3).

[0077] The fiber yarn (134-2) in the above-mentioned brush (134) is not limited to any specific type, and a material that allows for easy adsorption of foreign substances by static electricity generated during the writing process may be applied.

[0079] From the above description, those skilled in the art will understand that various changes and modifications are possible within the scope of the technical concept of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the claims. Explanation of the symbols

[0081] 1: Device of the present invention 2: Housing 3 : Hitting Ball 4 : Drive Key 5 : Cam 6 : Spring 7 : Control module 8 : Support section

Claims

Claim 1 A non-destructive inspection device comprising: a housing having slide holes formed on opposing surfaces; a slide rod that slides through the slide holes and slides within the housing, a striking member including a sensor member at the end of the slide rod and a striking head on the outer side of the sensor member; a driving key including a diaphragm mounted on the slide rod and a roller formed on one side of the diaphragm; a cam that rotates in conjunction with a motor and has a key projection formed thereon to cause the slide rod, which is integrally linked with the driving key, to slide in conjunction within the housing through the linkage of the key projection and the roller; a pair of springs configured on both sides of the diaphragm in the housing; and a control module including a control unit that receives a sensing value from the striking member and a data unit that receives and stores the sensing value from the control unit; wherein a second slide hole through which the slide rod passes is formed within the housing while forming a gap between each slide hole, and a support end with a spring mounted thereon is formed on the inner side of each slide hole. Claim 2 delete Claim 3 A non-destructive inspection device according to claim 1, wherein the housing is configured with a slide hole, and the driving key further comprises a guide member having a guide projection protruding from one side of the diaphragm and inserted into the slide hole at its end to slide in the slide hole. Claim 4 A non-destructive inspection device according to claim 1, wherein a guide member is further configured at the end of the housing to induce a vertical strike on the structural surface of the striking member, the guide member is composed of a guide bar protruding in four axes from the housing and a contact sensor at the end of the guide bar, and the control unit controls the motor to drive the cam when a contact signal with the structural surface is output from the contact sensor in four axes. Claim 5 A non-destructive inspection device according to claim 4, characterized in that an elastic means is further configured between the guide bar and the contact sensor. Claim 6 A non-destructive inspection device according to claim 1, wherein the roller comprises a connecting plate protruding from one side of the diaphragm, a first roller rotatably mounted on the connecting plate, and a second roller rotatably mounted on the connecting plate while forming a gap with the first roller, and further comprises a guide tube placed between the first roller and the second roller while connecting each support end. Claim 7 A non-destructive inspection device according to claim 6, wherein a high-pressure air supply means is further configured, and one end of the guide tube is connected to a spray nozzle configured on one side of the housing, and a high-pressure air discharge tube connected to the high-pressure air supply means is connected to the other side of the guide tube. Claim 8 A non-destructive inspection device according to claim 7, wherein the injection nozzle comprises a straight pipe portion protruding from the housing, a discharge pipe portion connected to the end of the straight pipe portion so as to be rotatable by a bearing and having a curved pipe shape from which high-pressure air is discharged, and a brush portion composed of a mounting ring at the end of the discharge pipe portion and a plurality of fibers connected to the end of the mounting ring.

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