Multi-modal fusion steel structure nondestructive testing device

Abstract

The invention relates to the technical field of steel structure detection, and discloses a multi-modal fusion steel structure nondestructive testing 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 a detection probe; the connecting frame is connected to the connecting mechanism, and the mounting seat is rotationally connected to the connecting frame; the number of the detection probes is three, and the three detection probes are distributed on the mounting base around the rotating axis of the mounting base in the annular direction at intervals, and the three detection probes are an electromagnetic eddy current probe, an ultrasonic probe and an infrared thermal imaging probe respectively. According to the invention, the comprehensiveness of steel structure detection can be improved.

Description

Technical Field

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

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

[0003] Currently, non-destructive testing of steel structures is usually performed by operators using handheld testing instruments to scan the points on the steel structure that need to be tested, such as welds. However, using a single instrument often makes it difficult to comprehensively and accurately assess the condition of the steel structure, and is prone to false detection and missed detection of steel structure defects. Summary of the Invention

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

[0005] This application provides a multi-modal fusion non-destructive testing device for steel structures, which adopts the following technical solutions: A multi-modal fusion non-destructive testing device for steel structures, comprising: a supporting mechanism, a testing mechanism, and a connecting mechanism, wherein the testing mechanism is connected to the supporting mechanism via the connecting mechanism, and the testing mechanism is movable relative to the supporting mechanism; 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 rotatably connected to the connecting frame; the detection probes are three and are distributed on the mounting seat at intervals along the circumferential direction around the rotation axis of the mounting seat, and the three detection probes are an electromagnetic eddy current probe, an ultrasonic probe and an infrared thermal imaging probe.

[0006] By adopting this technical solution, multimodal fusion testing is achieved by integrating three different types of detection probes—an electromagnetic eddy current probe, an ultrasonic probe, and an infrared thermal imaging probe—into a single detection mechanism. This comprehensive approach leverages different detection principles, overcoming the limitations of a single instrument in comprehensively and accurately assessing the condition of steel structures. This allows for multi-dimensional testing of steel structures, improving the comprehensiveness and accuracy of test results.

[0007] Optionally, the detection mechanism further includes an abutment member, which is mounted on the mounting seat and is used to abut against the surface of the steel structure to be detected, so as to maintain a distance between the infrared thermal imaging detection probe and the surface to be detected.

[0008] By adopting the above technical solution, the abutment is installed on the mounting seat and contacts the surface of the steel structure to be inspected, so that an appropriate distance is maintained between the infrared thermal imaging detection probe and the surface to be inspected, thereby improving the accuracy and stability of infrared thermal imaging detection.

[0009] Optionally, the detection mechanism also includes an air supply pipe and a nozzle; three nozzles are arranged at circumferential intervals around the rotation axis of the mounting base, so that the nozzles and the detection probes are alternately distributed around the rotation axis of the mounting base, and the air outlets of the nozzles are away from the mounting base; the three nozzles are all connected to the air supply pipe, and the air supply pipe is installed on the mounting base for supplying air to the nozzles.

[0010] By adopting the above technical solution and setting up the air pipe and the nozzle, the surface of the steel structure to be inspected can be blown clean before inspection to remove dust, impurities, etc. on the surface to be inspected, thereby reducing the interference of these factors on the inspection results and improving the accuracy of the inspection.

[0011] Optionally, a heating element is provided in the inner cavity of the air jet head adjacent to the infrared thermal imaging probe.

[0012] By adopting this technical solution, a heating element is installed in the inner cavity of the air jet head adjacent to the infrared thermal imaging probe to heat the ejected gas. The heated gas is blown across the surface to be inspected, changing the temperature distribution of the surface. This helps the infrared thermal imaging probe more clearly detect temperature changes on the surface, thereby improving the effectiveness of infrared thermal imaging inspections.

[0013] Optionally, the three detection probes and the three air jet heads are evenly and alternately distributed around the rotation axis of the mounting base, the detection probes correspond to the air jet heads one by one, and the detection probes and the air jet heads are distributed along the same straight line direction; The air outlet end of the nozzle has air guide plates connected to the mounting seat on both opposite sides, and the connecting frame has an enclosure component enclosing the mounting seat on one side close to the connecting mechanism. When the detection probe performs detection work, the air guide plates on both sides of the nozzle corresponding to the detection probe form air guide channels between the enclosure component, and the air guide channels face the detection probe adjacent to the nozzle.

[0014] By adopting the above technical solution, the surface to be inspected is blown through the air guide channel, so as to further clean the surface to be inspected and cool the adjacent detection probes.

[0015] Optionally, when the detection probe is directed toward the surface to be detected, the blowing points where the two air jets adjacent to the detection probe extend to the surface to be detected are located between the blowing points where the two air guide channels extend to the surface to be detected.

[0016] By adopting the above technical solution, the airflow in the air guide channel is less likely to interfere with the airflow of the nozzle.

[0017] Optionally, the enclosure assembly includes a cover, a moving member, and an elastic member; the cover is provided on a side of the mounting seat close to the connecting mechanism; the moving member moves in the cover in a direction perpendicular to the rotation axis of the mounting seat; the elastic member is connected between the cover and the moving member and is used to impart elastic force to the moving member to move toward the mounting seat; There are notches on both sides of the air outlet end of the nozzle. When the nozzle is opposite to the movable part, the movable part is driven by the elastic part to abut against the air outlet end of the nozzle. The air guide channel is formed between the movable part and the air guide plate, and the notch is connected to the air guide channel.

[0018] Optionally, the detection probe is detachably connected to the mounting base.

[0019] By adopting the above technical solution, the detection probe can be detachably connected to the mounting base, making it convenient to maintain, replace and upgrade the detection probe.

[0020] Optionally, a pressure sensor is provided between the connecting mechanism and the mounting seat.

[0021] By adopting the above technical solution, a pressure sensor is installed between the connecting mechanism and the mounting base, which can monitor the pressure applied by the detection mechanism to the surface of the steel structure to be inspected in real time. By properly controlling the pressure, damage to the detection probe caused by excessive pressure can be avoided, while also ensuring good contact between the detection probe and the surface to be inspected, thereby improving the accuracy and reliability of the detection.

[0022] In summary, this application has at least one of the following beneficial effects: 1. By integrating three different detection probes, namely electromagnetic eddy current probe, ultrasonic probe and infrared thermal imaging probe, into the same detection mechanism, multi-modal fusion detection is achieved. This allows for detection of steel structures from multiple angles, improving the accuracy and reliability of the detection results. 2. Set up the air pipe and air nozzle to blow air to clean the surface to be tested before testing, remove dust, impurities and other interference factors, and create a good testing environment for the detection probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of an embodiment of the present application; Figure 2 is a side view of the detection mechanism in the embodiment of the present application; Figure 3 is a front view of the mounting base in an embodiment of the present application; Figure 4 This is a schematic diagram of the explosion structure between the mounting base, the gas pipe, and the nozzle in the embodiment of the present application; Figure 5is a perspective view of a detection mechanism in an embodiment of the present application; Figure 6 It is a schematic diagram of the structure of the cooperation between the moving part and the nozzle in the embodiment of the present application.

[0024] Explanation of the accompanying drawings: 1. Support mechanism; 101. Chassis; 102. Travel wheel; 2. Connecting mechanism; 3. Connecting frame; 31. Connecting plate; 32. Mounting plate; 4. Mounting seat; 41. Center portion; 42. Protrusion; 5. Detection probe; 51. Electromagnetic eddy current probe; 52. Ultrasonic probe; 53. Infrared thermal imaging probe; 6. Abutment; 61. Connecting rod; 62. Rotating wheel; 7. Gas pipe; 8. Nozzle; 9. Heating element; 10. Air guide plate; 11. Air guide channel; 12. Cover; 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

[0025] The following is combined with Figure 1-6 This application is described in further detail.

[0026] The embodiment of the present application discloses a multi-modal fusion non-destructive testing device for steel structures. Figure 1 The multimodal fusion nondestructive testing device for steel structures includes a support mechanism 1, a testing 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 to drive the testing mechanism to move relative to the support mechanism 1, so that the testing mechanism moves to perform nondestructive testing on the surface to be tested of the steel structure.

[0027] The supporting mechanism 1 includes a chassis 101 and a running wheel 102. The running wheel 102 is rotatably connected to the bottom of the chassis 101. The chassis 101 is used to install an operation panel, a display (not shown in the figure), etc.

[0028] As for the connection mechanism 2 , the connection mechanism 2 includes a mechanical arm, which is installed on the chassis 101 , and the end of the mechanical arm is connected to the detection mechanism through a flange.

[0029] Reference Figure 1 and Figure 2 As for the detection mechanism, it includes a connecting frame 3, a mounting base 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 mounted to the end of the robot arm through the cooperation of flange bolts and nuts. A pressure sensor 16 is also installed between the connecting plate 31 and the end of the robot arm. A rotating motor 17 capable of forward and reverse rotation is mounted on the connecting plate 31. The output end of the rotating motor 17 is fixedly connected to the mounting base 4, allowing the mounting base 4 to rotate relative to the connecting frame 3.

[0030] Reference Figure 2 and Figure 3 The mounting base 4 includes a central portion 41 and a protrusion 42. The central portion 41 is disc-shaped, and the output end of the rotating motor 17 is coaxially fixed to the central portion 41. There are three protrusions 42, and the three protrusions 42 are evenly spaced and integrally formed on the outer periphery of the central portion 41. Each protrusion 42 is in the shape of a rod extending radially along the central portion 41. The thickness of the protrusion 42 and the central portion 41 along the axial direction of the central portion 41 are consistent, and the interior of the protrusion 42 is hollow for the insertion of the detection probe 5. The mounting end of the detection probe 5 is inserted into the protrusion 42 and locked to the protrusion 42 by a bolt. The detection end of the detection probe 5 is located outside the protrusion 42 and away from the protrusion 42. The protrusion 42 is provided with a hollow hole connecting the inner cavity with the external environment along its own circumference to improve the heat dissipation efficiency of the detection probe 5.

[0031] The three detection probes 5 are different, namely an electromagnetic eddy current probe 51, an ultrasonic probe 52, and an infrared thermal imaging probe 53. The three detection probes 5 are connected to corresponding mainframes via cables, all of which are located in the chassis 101. Since the battery eddy current probe and the ultrasonic probe 52 both perform detection by contacting the surface to be detected, the battery eddy current probe and the ultrasonic probe 52 protrude from the protrusion 42 at the same distance, while the infrared thermal imaging probe 53 needs to be at a distance from the surface to be detected for detection. Therefore, the detection mechanism also includes an abutment 6, which is provided on the protrusion 42 on which the infrared thermal imaging probe 53 is mounted, and two abutments 6 are installed axially along the center portion 41.

[0032] Specifically, in this embodiment, the abutment member 6 includes a connecting rod 61 and a rotating wheel 62. One end of the connecting rod 61 is fixed to the end of the protrusion 42 away from the central portion 41, and the end of the connecting rod 61 away from the protrusion 42 extends beyond the end of the infrared thermal imaging probe 53 that extends beyond the protrusion 42. The rotating wheel 62 is rotatably connected to the end of the connecting rod 61 away from the protrusion 42. The connecting rods 61 of the two abutment members 6 are parallel to each other, and the axes of the rotating wheels 62 of the two abutment members 6 are parallel to the axis of the central portion 41. When the detection end of the infrared thermal imaging probe 53 is facing the surface to be detected, the rotating wheels 62 of the two abutment members 6 can abut on the surface to be detected at the same time, so that the detection end of the infrared thermal imaging probe 53 maintains a distance from the surface to be detected.

[0033] Reference Figure 1 and Figure 3When the detection device is performing an inspection, the robotic arm can drive one of the detection probes 5 in the detection mechanism to move across the inspection surface for inspection. After the detection probe 5 completes a section of the inspection path, the rotating motor 17 drives the mounting base 4 to rotate 120 degrees, switching the detection end of another detection probe 5 toward the surface to be inspected. The robotic arm then drives the detection probe 5 to repeat the previous movement path, and this cycle continues until all three detection probes 5 have completed the inspection of the same path. That is, the detection structures of the three detection probes 5 can be combined for fusion analysis to obtain a more comprehensive inspection result. For example, the ultrasonic probe 52 can detect pores inside the weld of a steel structure, the electromagnetic eddy current probe 51 can detect cracks on the surface of a steel structure, and the infrared thermal imaging probe 53 can detect rust and cracks on the surface of a steel structure. In addition, during the process of the robotic arm driving the detection probe 5 to move, the data fed back by the pressure sensor 16 ensures that the detection probe 5 or the rotating wheel 62 maintains contact with the surface to be inspected.

[0034] Reference Figure 3 and Figure 4 Furthermore, since dust and impurities often adhere to the surface of the steel structure, the inspection mechanism also includes an air supply pipe 7 and an air nozzle 8. The air nozzle 8 can be used to spray air onto the surface of the steel structure to remove dust and impurities on the surface of the steel structure. Specifically, one end of the air supply pipe 7 is coaxially embedded in the center portion 41, and the other end of the air supply pipe 7 is connected to an air pump (not shown in the figure). There are three air nozzles 8, which are evenly spaced and installed on the center portion 41 along the circumference of the center portion 41. The three air nozzles 8 and the three detection probes 5 are evenly spaced and alternately distributed along the circumference of the center portion 41. The three air nozzles 8 all extend radially along the center portion 41. The air inlet ends of the air nozzles 8 are all connected to the air supply pipe 7, and the air outlet ends of the spray heads are away from the center portion 41. The size of the air inlet end of each air nozzle 8 is smaller than that of the air outlet end, and the thickness of the air outlet end of the air nozzle 8 along the axial direction of the center portion 41 is consistent with the thickness of the protrusion 42.

[0035] When the detection end of the detection probe 5 faces the surface to be detected, the air supply pipe 7 supplies air to the three air nozzles 8, so that the air nozzles 8 on both sides of the detection probe 5 tilt to spray air toward the surface to be detected, so as to clean the moving path of the detection probe 5.

[0036] Reference Figure 2 and Figure 5Furthermore, a heating element 9 is installed within the inner cavity of the air jet 8 adjacent to the infrared thermal imaging probe 53. When the infrared thermal imaging probe 53 is inspecting, the heating element 9 is activated, causing the air jet 8 to eject hot air to heat the surface to be inspected. Because defects such as cracks and rust on the steel structure's surface can hinder heat transfer, heating creates a temperature difference between the defective area and the surrounding healthy area, enhancing the infrared thermal imaging probe 53's ability to detect defects. In this embodiment, the heating element 9 is an electric heating wire installed within the inner cavity of the air jet 8. In other embodiments, the heating element 9 can also be an electric heating tube or electric heating rod.

[0037] Reference Figure 4 and Figure 6 In addition, in order to improve the cleaning effect of the steel structure, the connecting frame 3 is provided with an enclosure component, and the air outlet end of the nozzle head 8 is provided with air guide plates 10 on both sides opposite to each other along the circumference of the central part 41. When the detection probe 5 is directed toward the surface to be detected for detection, the enclosure component and the air guide plates 10 of the nozzle head 8 that are not adjacent to the detection probe 5 can be enclosed to form an air guide channel 11, and the air guide channel 11 is directed toward the surface to be detected to further blow air to clean the surface to be detected.

[0038] Reference Figure 3 and Figure 4 Specifically, the outlet end of each air nozzle 8 is symmetrically beveled on opposite sides to form notches 15, so that the width of the outlet end of the air nozzle 8 gradually decreases radially away from the center portion 41. Air guide plates 10 on opposite sides of the air nozzle 8 are respectively connected to the beveled surfaces on both sides of the air nozzle 8, and the ends of the air guide plates 10 away from the air nozzle 8 are connected to the adjacent protrusions 42.

[0039] Reference Figure 1 and Figure 5 The enclosure assembly includes a housing 12, a movable member 13, and an elastic member 14. The housing 12 is fixed to the lower surface of the connecting plate 31. The housing 12 has a square structure and defines a square movable cavity 18 with an opening facing away from the connecting plate 31. The side of the housing 12 away from the connecting plate 31 extends to the side of the mounting base 4 near the connecting plate 31. When the mounting base 4 rotates, it can drive the protrusion 42, the detection probe 5, and the air nozzle 8 into the movable cavity 18.

[0040] Reference Figure 5 and Figure 6The movable member 13 includes a first baffle 131 and a second baffle 132. The first baffle 131 is in the shape of a square plate with a cross section consistent with the cross section of the movable cavity 18, and the first baffle 131 moves in the movable cavity 18 in the direction close to or away from the connecting plate 31. There are two second baffles 132, one end of each of the two second baffles 132 is fixed on the side of the first baffle 131 facing away from the connecting plate 31, and the ends of the two second baffles 132 away from the first baffle 131 are respectively in contact with the inner walls of the opposite ends of the enclosure 12 at the movable cavity 18, so that the plate surfaces of the second baffles 132 are inclined relative to the plate surfaces of the first baffle 131, and at the same time, 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 member 14 is a spring connected between a surface of the first baffle 131 close to the connecting plate 31 and the inner wall of the enclosure 12 . The elastic force of the elastic member 14 imparts elastic force to the movable member 13 to move away from the connecting plate 31 .

[0041] The thicknesses of the first baffle 131 , the second baffle 132 , the air guide plate 10 and the outlet end of the nozzle 8 along the axial direction of the center portion 41 are all consistent, and are consistent with the distance between the two inner walls of the cover 12 relative to the moving chamber 18 along the axial direction of the center portion 41 .

[0042] The detection probe 5 corresponds one-to-one with the air jets 8 that are not adjacent to it, and the detection probe 5 and the corresponding air jets 8 are located on the same straight extension line. When the detection end of the detection probe 5 is facing the surface to be detected, the air outlet end of the air jet 8 opposite the detection probe 5 abuts against the first baffle 131. At the same time, the two second baffles 132 correspond one-to-one with the air guide plates 10 on both sides of the air jet 8. The corresponding air guide plates 10 and the second baffles 132 are parallel to each other. At this time, the corresponding air guide plates 10, the second baffles 132, and the inner wall of the cover 12 jointly enclose an air guide channel 11. There are air guide channels 11 on both sides of the air jet 8. The notches 15 on both sides of the air jet 8 are respectively connected to the air guide channels 11 on both sides, and the air outlet ends of the air guide channels 11 are tilted toward the surface to be detected.

[0043] Furthermore, the extension lines of the two air guide channels 11 toward the surface to be inspected pass through the adjacent detection probes 5 , so that when the airflow blows from the air guide channels 11 toward the surface to be inspected, the adjacent detection probes 5 can be cooled down at the same time.

[0044] When the detection probe 5 is pointed toward the surface to be inspected, the points where the two air nozzles 8 adjacent to the detection probe 5 extend to the surface to be inspected lie between the points where the two air channels 11 extend to the surface to be inspected. Therefore, when the infrared thermal imaging probe is inspecting, the surface to be inspected is first cooled by the cool air from the air channels 11, and then heated by the hot air from the air nozzles 8. This creates a larger thermal gradient between cracks and healthy areas of the steel structure, further improving the defect detection rate.

[0045] It should be noted that when the nozzle head 8 abuts against the first baffle 131, the elastic force of the elastic member 14 enables the nozzle head 8 to maintain an abutment state with the first baffle 131 during the jetting, and when the detection probe 5 passes through the movable cavity 18, the detection probe 5 can push the movable member 13 to move by resisting the elastic force of the elastic member 14, so that the movable member 13 adapts to the passage of the detection probe 5.

[0046] The implementation principle of a multimodal fusion nondestructive testing device for steel structures in an embodiment of the present application is as follows: when inspecting the steel structure, the electromagnetic eddy current probe 51, the ultrasonic probe 52 and the infrared thermal imaging probe 53 are respectively used to inspect the same point or area through the rotation of the mounting base 4 and the drive of the robotic arm, thereby enabling a more comprehensive detection of steel structure defects.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-modal fusion non-destructive testing device for steel structures, characterized in that: include: A supporting mechanism (1), a detecting mechanism and a connecting mechanism (2), wherein the detecting mechanism is connected to the supporting mechanism (1) via the connecting mechanism (2), and the detecting mechanism is movable relative to the supporting mechanism (1); The detection mechanism comprises a connecting frame (3), a mounting seat (4) and a detection probe (5); the connecting frame (3) is connected to the connecting mechanism (2), and the mounting seat (4) is rotatably connected to the connecting frame (3); the detection probe (5) has three detection probes and is distributed on the mounting seat (4) at intervals along a circumferential direction around the rotation axis of the mounting seat (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).

2. The multi-modal fusion non-destructive testing device for steel structures according to claim 1, characterized in that: The detection mechanism further comprises an abutment member (6), which is mounted on the mounting seat (4) and is used to abut against the surface of the steel structure to be detected, so as to maintain a distance between the infrared thermal imaging detection probe (5) and the surface to be detected.

3. The multi-modal fusion non-destructive testing device for steel structures according to claim 1, characterized in that: The detection mechanism further includes an air supply pipe (7) and an air jet head (8); three air jet heads (8) are arranged at intervals along the circumferential direction around the rotation axis of the mounting seat (4), so that the air jet heads (8) and the detection probe (5) are alternately distributed around the rotation axis of the mounting seat (4), and the air outlet of the air jet head (8) faces away from the mounting seat (4); the three air jet heads (8) are all connected to the air supply pipe (7), and the air supply pipe (7) is installed on the mounting seat (4) for supplying air to the air jet heads (8).

4. The multi-modal fusion non-destructive testing device for steel structures according to claim 3, characterized in that: A heating element (9) is provided in the inner cavity of the air jet head (8) adjacent to the infrared thermal imaging probe (53).

5. The multi-modal fusion non-destructive testing device for steel structures according to claim 3, characterized in that: The three detection probes (5) and the three air jet heads (8) are evenly and alternately distributed around the rotation axis of the mounting base (4), the detection probes (5) and the air jet heads (8) correspond one to one, and the detection probes (5) and the air jet heads (8) are distributed along the same straight line direction; The air outlet end of the nozzle (8) is provided with air guide plates (10) connected to the mounting seat (4) on both opposite sides, and the connecting frame (3) is provided with an enclosure component enclosing the mounting seat (4) on one side close to the connecting mechanism (2). When the detection probe (5) performs detection work, the air guide plates (10) on both sides of the nozzle (8) corresponding to the detection probe (5) form air guide channels (11) with the enclosure component, and the air guide channels (11) face the detection probe (5) adjacent to the nozzle (8).

6. The multi-modal fusion non-destructive testing device for steel structures according to claim 5, characterized in that: When the detection probe (5) is directed toward the surface to be detected for detection, the blowing points of the two air 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.

7. The multi-modal fusion non-destructive testing device for steel structures according to claim 5, characterized in that: The enclosure assembly comprises a cover (12), a moving member (13) and an elastic member (14); the cover (12) is arranged on a side of the mounting seat (4) close to the connecting mechanism (2); the moving member (13) moves in the cover (12) along a direction perpendicular to the rotation axis of the mounting seat (4); the elastic member (14) is connected between the cover (12) and the moving member (13) and is used to give the moving member (13) an elastic force to move toward the mounting seat (4); The air outlet end of the nozzle (8) is provided with notches (15) on opposite sides. When the nozzle (8) is opposite to the movable member (13), the movable member (13) is driven by the elastic member (14) to abut against the air outlet end of the nozzle (8). The air guide channel (11) is formed between the movable member (13) and the air guide plate (10), and the notch (15) is connected to the air guide channel (11).

8. The multi-modal fusion non-destructive testing device for steel structures according to claim 1, characterized in that: The detection probe (5) is detachably connected to the mounting base (4).

9. The multi-modal fusion non-destructive 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 seat (4).

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