A multi-modal fusion steel structure non-destructive testing device

Abstract

The application relates to the technical field of steel structure detection, and discloses a multi-modal fusion steel structure nondestructive detection device, which comprises a supporting mechanism, a detection mechanism and a connecting mechanism, the detection mechanism is connected to the supporting mechanism through the connecting mechanism, and the detection mechanism can move relative to the supporting mechanism; the detection mechanism comprises a connecting frame, a mounting seat and detection probes; the connecting frame is connected to the connecting mechanism, and the mounting seat is rotationally connected to the connecting frame; the detection probes are distributed on the mounting seat in a ring direction along a rotating shaft line of the mounting seat, and the three detection probes are respectively an electromagnetic eddy current probe, an ultrasonic wave probe and an infrared thermal imaging probe. The application can improve the comprehensiveness of steel structure detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel structure detection, and in particular to a multi-modal fusion steel structure non-destructive detection device. BACKGROUND

[0002] With the rapid development of modern buildings, bridges and other fields, steel structures have been widely used in engineering structures due to their high strength, light weight, easy processing and other advantages.

[0003] Currently, non-destructive detection of steel structures is usually performed by an operator holding a detection instrument to scan the steel structure detection points such as welds, but using a single instrument often cannot comprehensively and accurately evaluate the state of the steel structure, and may result in false detection and missed detection of defects in the steel structure. SUMMARY

[0004] In order to improve the comprehensiveness of steel structure detection, the present application provides a multi-modal fusion steel structure non-destructive detection device.

[0005] The present application provides a multi-modal fusion steel structure non-destructive detection device, which adopts the following technical scheme:

[0006] A multi-modal fusion steel structure non-destructive detection device, comprising a support mechanism, a detection mechanism and a connecting mechanism, the detection mechanism being connected to the support mechanism through the connecting mechanism, and the detection mechanism being movable relative to the support mechanism;

[0007] The detection mechanism includes a connecting frame, a mounting seat and a detection probe; the connecting frame is connected to the connecting mechanism, and the mounting seat is rotationally connected to the connecting frame; the detection probe has three detection probes distributed on the mounting seat along the circumferential direction around the mounting seat rotation axis, and the three detection probes are respectively an electromagnetic eddy current probe, an ultrasonic probe and an infrared thermal imaging probe.

[0008] By adopting the above technical scheme, the electromagnetic eddy current probe, the ultrasonic probe and the infrared thermal imaging probe of three different types of detection probes are integrated on one detection mechanism to realize multi-modal fusion detection. Different detection principles can be comprehensively utilized to overcome the limitation that a single instrument cannot comprehensively and accurately evaluate the state of the steel structure, and the steel structure can be detected from multiple dimensions to improve the comprehensiveness and accuracy of the detection results.

[0009] Optionally, the detection mechanism further comprises an abutting piece mounted on the mounting seat for abutting against the steel structure to be detected to maintain a distance between the infrared thermal imaging detection probe and the surface to be detected.

[0010] By adopting the technical scheme, the abutting member is installed on the mounting seat and abuts against the surface of the steel structure to be detected, so that a proper distance is kept between the infrared thermal imaging detection probe and the surface to be detected, and the accuracy and stability of the infrared thermal imaging detection are improved.

[0011] Optionally, the detection mechanism further comprises a gas delivery pipe and a gas jet head; three gas jet heads are arranged along the circumferential direction at intervals around the rotation axis of the mounting seat, so that the gas jet heads and the detection probes are alternately distributed around the rotation axis of the mounting seat, and the gas outlets of the gas jet heads face away from the mounting seat; the three gas jet heads are connected to the gas delivery pipe, and the gas delivery pipe is installed on the mounting seat to deliver gas to the gas jet heads.

[0012] By adopting the technical scheme, the gas jet head and the gas delivery pipe are arranged to clean the surface of the steel structure to be detected before detection, so that dust and impurities on the surface to be detected are removed, the interference of these factors on the detection result is reduced, and the accuracy of detection is improved.

[0013] Optionally, a heating element is arranged in the inner cavity of the gas jet head adjacent to the infrared thermal imaging probe.

[0014] By adopting the technical scheme, the heating element arranged in the inner cavity of the gas jet head adjacent to the infrared thermal imaging probe can heat the gas jetted out. The heated gas blows on the surface to be detected, which can change the temperature distribution of the surface to be detected, and help the infrared thermal imaging probe to detect the temperature change of the surface to be detected more clearly, thereby improving the effect of infrared thermal imaging detection.

[0015] Optionally, the three detection probes and the three gas jet heads are uniformly and alternately distributed around the rotation axis of the mounting seat, the detection probes correspond to the gas jet heads one by one, and the detection probes and the gas jet heads are distributed along the same straight line direction.

[0016] The gas outlet end of the gas jet head has a gas guide plate connected to the mounting seat on each side, and the connecting frame has an enclosing assembly enclosing the side of the mounting seat close to the connecting mechanism; when the detection probe is working, the gas guide plates on the two sides of the gas jet head corresponding to the detection probe form a gas guide channel between the gas guide plates and the enclosing assembly, and the gas guide channel faces the detection probe adjacent to the gas jet head.

[0017] By adopting the technical scheme, the surface to be detected is further cleaned by blowing through the gas guide channel, and the adjacent detection probe can be cooled.

[0018] Optionally, when the detection probe detects the surface to be detected, the blowing points of the two gas jet heads adjacent to the detection probe on the surface to be detected are located between the blowing points of the two gas guide channels on the surface to be detected.

[0019] By adopting the technical scheme, the airflow of the air guide channel is not prone to interfering with the airflow of the air jet head.

[0020] Optionally, the enclosing assembly comprises an enclosure, a moving piece, and an elastic piece; the enclosure is arranged on the side of the mounting seat close to the connecting mechanism; the moving piece moves in the enclosure along the direction perpendicular to the rotation axis of the mounting seat; and the elastic piece is connected between the enclosure and the moving piece, and gives the moving piece an elastic force to move towards the mounting seat.

[0021] The air jet head has notches on the opposite sides of the air outlet end; when the air jet head is opposite to the moving piece, the moving piece is abutted against the air outlet end of the air jet head under the driving of the elastic piece; the air guide channel is formed between the moving piece and the air guide plate, and the notches are communicated with the air guide channel.

[0022] Optionally, the detection probe is detachably connected to the mounting seat.

[0023] By adopting the technical scheme, the detection probe is detachably connected to the mounting seat, so that the detection probe can be conveniently maintained, replaced, and upgraded.

[0024] Optionally, a pressure sensor is arranged between the connecting mechanism and the mounting seat.

[0025] By adopting the technical scheme, the pressure sensor is arranged between the connecting mechanism and the mounting seat, so that the pressure of the detection mechanism on the surface to be detected of the steel structure can be monitored in real time. By reasonably controlling the pressure, damage to the detection probe caused by excessive pressure can be avoided, and at the same time, good contact between the detection probe and the surface to be detected can be achieved, so that the accuracy and reliability of detection are improved.

[0026] In summary, the present application has at least one of the following beneficial effects:

[0027] 1. By integrating the electromagnetic eddy current probe, the ultrasonic probe, and the infrared thermal imaging probe into the same detection mechanism, multi-modal fusion detection is realized. The steel structure can be detected from multiple angles, and the accuracy and reliability of the detection result are improved.

[0028] 2. The air conveying pipe and the air jet head are arranged, so that the surface to be detected can be cleaned by blowing air before detection, and interference factors such as dust and impurities are removed, so that a good detection environment is created for the detection probe. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0030] Figure 2 is a side view of the detection mechanism in the embodiment of the present application.

[0031] Figure 3 is the front view of the mounting seat in the embodiment of the application;

[0032] Figure 4 is the schematic diagram of the explosion structure between the mounting seat, the gas delivery pipe and the jet head in the embodiment of the application;

[0033] Figure 5 is the perspective view of the detection mechanism in the embodiment of the application;

[0034] Figure 6 is the structural schematic diagram of the cooperation between the moving part and the jet head in the embodiment of the application.

[0035] Legend: 1, support mechanism; 101, case; 102, walking wheel; 2, connecting mechanism; 3, connecting frame; 31, connecting plate; 32, mounting plate; 4, mounting seat; 41, center part; 42, protruding part; 5, detection probe; 51, electromagnetic eddy current probe; 52, ultrasonic probe; 53, infrared thermal imaging probe; 6, abutting part; 61, connecting rod; 62, rotating wheel; 7, gas delivery pipe; 8, jet head; 9, heating element; 10, gas guide plate; 11, gas guide channel; 12, shroud; 13, moving part; 131, first baffle; 132, second baffle; 14, elastic part; 15, notch; 16, pressure sensor; 17, rotating motor; 18, moving cavity. DETAILED DESCRIPTION

[0036] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The application will be further described in detail.

[0037] The embodiment of the application discloses a multi-modal fusion steel structure nondestructive testing device. Referring to Figure 1 The multi-modal fusion steel structure nondestructive testing device comprises a support mechanism 1, a detection mechanism and a connecting mechanism 2. The connecting mechanism 2 is connected between the support mechanism 1 and the connecting mechanism 2, and is used for driving the detection mechanism to move relative to the support mechanism 1, so that the detection mechanism moves to perform nondestructive testing on the surface to be detected of the steel structure.

[0038] For the support mechanism 1, the support mechanism 1 comprises a case 101 and a walking wheel 102, and the walking wheel 102 is rotationally connected to the bottom of the case 101. The case 101 is used for installing an operation panel, a display (not shown in the figure) and the like.

[0039] For the connecting mechanism 2, the connecting mechanism 2 comprises a mechanical arm, the mechanical arm is installed on the case 101, and the end of the mechanical arm is connected with the detection mechanism through a flange.

[0040] Referring to Figure 1 and Figure 2For the detection mechanism, the detection mechanism includes a connecting frame 3, a mounting seat 4 and a detection probe 5. The connecting frame 3 includes a connecting plate 31 and a mounting plate 32 connected to each other, the connecting plate 31 and the mounting plate 32 are perpendicular to each other, the connecting plate 31 is installed to the end of the mechanical arm through the cooperation of the flange bolt and the nut, and a pressure sensor 16 is further installed between the connecting plate 31 and the end of the mechanical arm. A rotating motor 17 capable of forward and reverse rotation is installed on the connecting plate 31, the output end of the rotating motor 17 is fixedly connected to the mounting seat 4, so that the mounting seat 4 can rotate relative to the connecting frame 3.

[0041] Referring to Figure 2 and Figure 3 , the mounting seat 4 includes a center part 41 and a protruding part 42. The center part 41 is disc-shaped, and the output end of the rotating motor 17 is coaxially fixed to the center part 41. The protruding part 42 has three, the three protruding parts 42 are uniformly spaced and integrally formed on the outer periphery of the center part 41, each protruding part 42 is rod-shaped extending along the radial direction of the center part 41, the thickness of the protruding part 42 along the axis direction of the center part 41 is consistent with that of the center part 41, and the inside of the protruding part 42 is hollow for inserting the detection probe 5. The mounting end of the detection probe 5 is inserted into the protruding part 42 and locked to the protruding part 42 through a bolt, and the detection end of the detection probe 5 is located outside the protruding part 42 and away from the protruding part 42. The protruding part 42 is provided with a hollow hole along the circumferential direction of the protruding part 42, which communicates the inner cavity with the external environment, so as to improve the heat dissipation efficiency of the detection probe 5.

[0042] Among them, the three detection probes 5 are different, which are respectively an electromagnetic eddy current probe 51, an ultrasonic probe 52 and an infrared thermal imaging probe 53, and the three detection probes 5 are located in the case 101 through the corresponding host connected by the cable. Since the battery eddy current probe and the ultrasonic probe 52 are detected by being attached to the surface to be detected, the distance of the battery eddy current probe and the ultrasonic probe 52 protruding from the protruding part 42 is consistent, and the infrared thermal imaging probe 53 needs to be detected at a distance from the surface to be detected, therefore, the detection mechanism further includes an abutting piece 6, the abutting piece 6 is arranged on the protruding part 42 where the infrared thermal imaging probe 53 is arranged, and the abutting piece 6 is axially installed with two.

[0043] Specifically, in this embodiment, the abutting piece 6 includes a connecting rod 61 and a rotating wheel 62. One end of the connecting rod 61 is fixed to one end of the protruding part 42 away from the center part 41, and the end of the connecting rod 61 away from the protruding part 42 protrudes beyond the end of the infrared thermal imaging probe 53 protruding from the protruding part 42. The rotating wheel 62 is rotatably connected to the end of the connecting rod 61 away from the protruding part 42. The connecting rods 61 of the two abutting pieces 6 are parallel to each other, and the axes of the rotating wheels 62 of the two abutting pieces 6 are parallel to the axis of the center part 41. When the detection end of the infrared thermal imaging probe 53 faces the surface to be detected, the rotating wheels 62 of the two abutting pieces 6 can simultaneously abut on the surface to be detected, so as to keep a distance between the detection end of the infrared thermal imaging probe 53 and the surface to be detected.

[0044] With reference to Figure 1 and Figure 3 , when the detection device detects, the mechanical arm can drive one of the detection probes 5 in the detection mechanism to move on the detection surface for detection. After the detection probe 5 detects a path, the rotating motor 17 drives the mounting seat 4 to rotate 120°, and the detection end of another detection probe 5 is switched to face the detection surface. The mechanical arm drives the detection probe 5 to repeat the last moving path, and the cycle is repeated until all three detection probes 5 detect the same path, that is, the detection structures of the three detection probes 5 are combined and analyzed to obtain a more comprehensive detection result. For example, the ultrasonic probe 52 can detect pores inside the steel structure weld, the electromagnetic eddy current probe 51 can detect surface cracks of the steel structure, and the infrared thermal imaging probe 53 can detect surface rust and cracks of the steel structure. During the movement of the mechanical arm driving the detection probe 5, the data fed back by the pressure sensor 16 keeps the detection probe 5 or the rotating wheel 62 in abutment with the detection surface.

[0045] With reference to Figure 3 and Figure 4 , further, since dust and impurities are often attached to the surface of the steel structure, the detection mechanism further includes a gas supply pipe 7 and a gas jet head 8, which can jet gas to the surface of the steel structure to remove dust and impurities on the surface of the steel structure. Specifically, one end of the gas supply pipe 7 is coaxially embedded in the center part 41, and the other end of the gas supply pipe 7 is connected to a gas pump (not shown in the figure). The gas jet head 8 has three, and the three gas jet heads 8 are uniformly spaced along the circumference of the center part 41 and are mounted on the center part 41, so that the three gas jet heads 8 and the three detection probes 5 are alternately distributed along the circumference of the center part 41, and the three gas jet heads 8 extend radially along the center part 41. The gas inlet end of the gas jet head 8 is communicated with the gas supply pipe 7, and the gas outlet end of the gas jet head 8 faces away from the center part 41. Among them, the size of the gas inlet end of each gas jet head 8 is smaller than the size of the gas outlet end, and the thickness of the gas outlet end of the gas jet head 8 along the center part 41 is consistent with the thickness of the convex part 42.

[0046] When the detection end of the detection probe 5 faces the detection surface, the gas supply pipe 7 supplies gas to the three gas jet heads 8, so that the gas jet heads 8 on both sides of the detection probe 5 are inclined to jet gas to the detection surface, so as to clean the moving path of the detection probe 5.

[0047] With reference to Figure 2 and Figure 5More further, the heating element 9 is installed in the inner cavity of the air jet head 8 adjacent to the infrared thermal imaging probe 53, and the heating element 9 is started when the infrared thermal imaging probe 53 is detected, so that the air jet head 8 sprays hot air to heat the surface to be detected. Since the surface cracks, rust and other defects of the steel structure will hinder heat transfer, the defect part will form a temperature difference with the surrounding healthy area during heating, so as to enhance the detectability of the infrared thermal imaging probe 53 to the defect. In this embodiment, the heating element 9 is an electric heating wire installed in the inner cavity of the air jet head 8, and in other embodiments, the heating element 9 can also be an electric heating tube or an electric heating rod.

[0048] With reference to Figure 4 And Figure 6 In addition, in order to improve the cleaning effect of the steel structure, the connecting frame 3 has an enclosing assembly, and the air outlet end of the air jet head 8 has a gas guide plate 10 on the opposite sides of the center part 41. When the detection probe 5 is directed to the surface to be detected for detection, the enclosing assembly and the gas guide plate 10 of the air jet head 8 not adjacent to the detection probe 5 can form a gas guide channel 11, and the gas guide channel 11 is directed to the surface to be detected to further blow and clean the surface to be detected.

[0049] With reference to Figure 3 And Figure 4 Specifically, the air outlet end of each air jet head 8 is symmetrically chamfered on the opposite sides to form a notch 15, so that the width of the air outlet end of the air jet head 8 gradually decreases along the center part 41 in the direction away from the center part 41. The gas guide plates 10 on the opposite sides of the air jet head 8 are respectively connected to the chamfered surfaces on the two sides of the air jet head 8, and the ends of the gas guide plates 10 away from the air jet head 8 are connected to the adjacent convex parts 42.

[0050] With reference to Figure 1 And Figure 5 The enclosing assembly includes a cover 12, a moving part 13 and an elastic part 14. The cover 12 is fixed to the lower surface of the connecting plate 31, and the cover 12 has a square structure and a moving cavity 18 which is square and opens away from the connecting plate 31. The side of the cover 12 away from the connecting plate 31 extends to the side of the mounting seat 4 close to the connecting plate 31, and the mounting seat 4 can drive the convex part 42, the detection probe 5 and the air jet head 8 into the moving cavity 18 when rotating.

[0051] With reference to Figure 5 And Figure 6The moving part 13 comprises a first baffle 131 and a second baffle 132. The first baffle 131 is a square plate with a cross section identical to that of the moving cavity 18, and the first baffle 131 moves in the moving cavity 18 along a direction close to or away from the connecting plate 31. The second baffle 132 has two ends, and the two second baffles 132 are fixed on a side of the first baffle 131 away from the connecting plate 31, and the ends of the two second baffles 132 away from the first baffle 131 abut against the inner walls of the opposite ends of the housing 12 at the moving cavity 18, so that the surfaces of the second baffles 132 are inclined to the surface of the first baffle 131, and the two second baffles 132 are mirror-symmetrical along the center line of the first baffle 131, and the distance between the two second baffles 132 gradually decreases towards the connecting plate 31. The elastic part 14 is a spring, and the elastic part 14 is connected between a side of the first baffle 131 close to the connecting plate 31 and the inner wall of the housing 12, and the elastic force of the elastic part 14 gives the moving part 13 an elastic force moving away from the connecting plate 31.

[0052] The thicknesses of the first baffle 131, the second baffles 132, the air guide plate 10 and the air outlet end of the air jet head 8 along the central part 41 in the axial direction are consistent, and are consistent with the distance between the opposite inner walls of the housing 12 at the moving cavity 18 along the central part 41 in the axial direction.

[0053] The detection probe 5 corresponds to the air jet head 8 adjacent to itself one by one, and the detection probe 5 and the corresponding air jet head 8 are located on the same straight line extension. When the detection end of the detection probe 5 faces the detection surface, the air outlet end of the air jet head 8 opposite to the detection probe 5 abuts against the first baffle 131, and the two second baffles 132 correspond to the air guide plates 10 on the two sides of the air jet head 8 one by one, and the corresponding air guide plates 10 are parallel to the second baffles 132, at this time, the corresponding air guide plates 10, the second baffles 132 and the inner wall of the housing 12 together form the air guide channel 11, the air jet head 8 has air guide channels 11 on the two opposite sides, the notches 15 on the two sides of the air jet head 8 are communicated with the air guide channels 11 on the two sides, and the air outlet end of the air guide channel 11 is inclined to the detection surface.

[0054] In addition, the extensions of the two air guide channels 11 towards the detection surface pass through the detection probe 5 adjacent to itself, so that the air flow from the air guide channel 11 can blow and cool the adjacent detection probe 5 when blowing towards the detection surface.

[0055] When the detection end of the detection probe 5 is directed towards the surface to be detected for detection, the two air jet heads 8 adjacent to the detection probe 5 extend to the blowing points of the surface to be detected, which are located between the blowing points of the two air guide channels 11 extending to the surface to be detected. Therefore, when the infrared thermal imaging probe is detecting, the surface to be detected is first cooled by the cold air blown out of the air guide channels 11, and then heated by the hot air blown out of the air jet heads 8, so as to enable the cracks of the steel structure to have a larger thermal gradient with the healthy area, thereby further improving the detection rate of defects.

[0056] It should be noted that when the air jet head 8 abuts against the first baffle 131, the elastic force of the elastic member 14 enables the air jet head 8 to abut against the first baffle 131 during blowing, and when the detection probe 5 passes through the moving cavity 18, the detection probe 5 can push the moving member 13 to move by resisting the elastic force of the elastic member 14, so that the moving member 13 can adapt to the passing of the detection probe 5.

[0057] The implementation principle of the steel structure non-destructive testing device of the multi-modal fusion of the embodiment of the application is that: when the steel structure is detected, the electromagnetic eddy current probe 51, the ultrasonic probe 52 and the infrared thermal imaging probe 53 are respectively arranged to detect the same point or area, so that the defects of the steel structure can be detected more comprehensively.

[0058] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A multimodal fusion nondestructive testing device for steel structures, characterized in that, include: The system includes a support mechanism (1), a detection mechanism, and a connecting mechanism (2). The detection mechanism is connected to the support mechanism (1) via the connecting mechanism (2), and the detection mechanism is movable relative to the support mechanism (1). The detection mechanism includes a connecting frame (3), a mounting base (4), and a detection probe (5); the connecting frame (3) is connected to the connecting mechanism (2), and the mounting base (4) is rotatably connected to the connecting frame (3); the detection probe (5) has three probes that are circumferentially spaced on the mounting base (4) around the axis of rotation of the mounting base (4), and the three detection probes (5) are an electromagnetic eddy current probe (51), an ultrasonic probe (52), and an infrared thermal imaging probe (53), respectively. The detection mechanism also includes an air supply pipe (7) and a jet head (8); three jet heads (8) are arranged circumferentially around the rotation axis of the mounting base (4), so that the jet heads (8) and the detection probe (5) are alternately distributed around the rotation axis of the mounting base (4), and the air outlet of the jet head (8) is away from the mounting base (4); all three jet heads (8) are connected to the air supply pipe (7), which is installed on the mounting base (4) and is used to supply air to the jet heads (8); The detection probe (5) corresponds one-to-one with the jet head (8), and the detection probe (5) and the jet head (8) are distributed along the same straight line direction; The jet head (8) has air guide plates (10) connected to the mounting base (4) on both sides of the air outlet end. The connecting frame (3) has an enclosure component surrounding the mounting base (4) on the side near the connecting mechanism (2). When the detection probe (5) performs detection work, the air guide plates (10) on both sides of the jet head (8) corresponding to the detection probe (5) form an air guide channel (11) with the enclosure component. The air guide channel (11) faces the detection probe (5) adjacent to the jet head (8). When the detection probe (5) is facing the surface to be detected, the blowing points of the two jet heads (8) adjacent to the detection probe (5) extending to the surface to be detected are located between the blowing points of the two air guide channels (11) extending to the surface to be detected.

2. The multimodal fusion nondestructive testing device for steel structures according to claim 1, characterized in that: The detection mechanism also includes an abutment (6), which is installed on the mounting base (4) and is used to abut against the steel structure surface to be detected so that the infrared thermal imaging probe (53) maintains a distance from the surface to be detected.

3. The multimodal fusion nondestructive testing device for steel structures according to claim 1, characterized in that: A heating element (9) is provided in the inner cavity of the jet head (8) adjacent to the infrared thermal imaging probe (53).

4. The multimodal fusion nondestructive testing device for steel structures according to claim 1, characterized in that: The enclosure assembly includes a cover (12), a movable member (13), and an elastic member (14); the cover (12) is disposed on the side of the mounting base (4) near the connecting mechanism (2); the movable member (13) moves in the cover (12) along a direction perpendicular to the rotation axis of the mounting base (4); the elastic member (14) is connected between the cover (12) and the movable member (13) and is used to provide the movable member (13) with a spring force to move towards the mounting base (4); The jet head (8) has notches (15) on both sides of the air outlet end. When the jet head (8) is opposite to the moving part (13), the moving part (13) abuts against the air outlet end of the jet head (8) under the drive of the elastic part (14). The air guide channel (11) is formed between the moving part (13) and the air guide plate (10), and the notch (15) is connected to the air guide channel (11).

5. The multimodal fusion nondestructive testing device for steel structures according to claim 1, characterized in that: The detection probe (5) is detachably connected to the mounting base (4).

6. The multimodal fusion nondestructive testing device for steel structures according to claim 1, characterized in that: A pressure sensor (16) is provided between the connecting mechanism (2) and the mounting base (4).

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