A deflection testing device for building steel structure

Abstract

The present invention relates to the technical field of steel structure deflection testing, and in particular to a building steel structure deflection testing device. It includes an unmanned aerial vehicle body, a mounting plate, a controller, a lifting block, a moving block, a first distance sensor, a first electromagnet, a second distance sensor, etc. The mounting plate is arranged above the unmanned aerial vehicle body, the controller is installed on the top of the mounting plate, the lifting block is placed on the top of the mounting plate, the moving block is symmetrically slidably connected to both sides of the mounting plate, the first distance sensor is respectively installed on the lifting block and the top of the moving block, the first electromagnet is installed on the side of the moving block, and the second distance sensor is installed on the moving block. The present invention can automatically complete the positioning and height measurement of the measuring point through the test device carried by the unmanned aerial vehicle, without the need to manually use the total station to align the reflector for height measurement multiple times, which can improve work efficiency, and can avoid errors caused by human operation, ensuring the accuracy of the measurement data.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure deflection testing, and in particular to a building steel structure deflection testing device. Background Art

[0002] Building steel structures are widely used in modern construction projects due to their high strength, light weight, and quick construction. However, in order to ensure the safety and stability of steel structures, their deformation under various loads must be accurately measured. Deflection testing is one of the important means of evaluating the performance of steel structures. It can help engineers understand the deformation of steel structures under actual use conditions, thereby ensuring the safety and functionality of steel structures.

[0003] At present, the deflection test of building steel structure usually adopts the following method: first, before the installation of building steel structure, technicians will select at least three measuring points on the steel structure, and paste reflective sheets at each measuring point, and record the spacing values ​​between adjacent measuring points; when the building steel structure is installed, use the camera of the total station to aim at the position of the reflective sheet in turn, and measure the initial height of each measuring point; then apply load to the building steel structure according to the predetermined loading scheme; use the total station again to measure the height of each measuring point and record the height data after loading; then calculate the settlement displacement value of each measuring point by comparing the height difference of each measuring point before and after loading, and finally calculate the deflection of the building steel structure using a specific formula. Although the above method can meet the needs of building steel structure deflection test to a certain extent, it is necessary to use the total station to align the reflective sheet for height measurement many times during the entire test process, which has cumbersome operation steps, takes a long time, and has low work efficiency; and the whole process relies on manual operation, which is easy to introduce measurement errors, resulting in the final measurement result being not accurate enough. Summary of the invention

[0004] In view of this, the present invention provides a building steel structure deflection testing device, which can overcome the shortcomings of the existing building steel structure deflection testing method that requires multiple use of a total station to align the reflective sheet for height measurement, the operation steps are cumbersome, time-consuming, and the work efficiency is low. In addition, the entire process relies on manual operation, which is easy to introduce measurement errors.

[0005] Technical solution: A building steel structure deflection testing device, including a drone body, a mounting plate, a controller, a spring block, a lifting block, a moving block, a first distance sensor, a first electromagnet, a second distance sensor, a lifting assembly, a moving assembly and a protective assembly. The mounting plate is arranged above the drone body, the controller is installed on the top of the mounting plate, the spring block is symmetrically installed inside the mounting plate, the lifting block is placed on the top of the mounting plate, the moving block is symmetrically slidably connected to both sides of the mounting plate, and the spring block clamps the moving block, the first distance sensor is respectively installed on the lifting block and the top of the moving block, the first electromagnet is installed on the side of the moving block, the second distance sensor is installed on the moving block, the lifting assembly is used to drive the lifting block to lift, the moving assembly is used to drive the mounting plate and the moving block to move, and the protective assembly is used to protect the drone body.

[0006] Furthermore, the lifting assembly includes a first electric push rod and a photoelectric sensor. The first electric push rod is installed at the bottom of the mounting plate, and the telescopic rod of the first electric push rod slides through the top of the mounting plate and is connected to the bottom of the lifting block. The photoelectric sensor consists of a receiver and a transmitter, and the receiver and the transmitter are respectively installed on the lifting block and the moving block.

[0007] Furthermore, the moving assembly includes a fixed block, a second electric push rod, a lifting frame, a second electromagnet, a driving motor and a friction wheel. The two fixed blocks are symmetrically connected to the top of the mounting plate, the second electric push rod is installed on the moving block, the lifting frame is slidably connected to the moving block, and the telescopic rod of the second electric push rod is connected to the lifting frame, the second electromagnet is symmetrically installed on the fixed block and the lifting frame, respectively, the driving motor is also symmetrically installed on the fixed block and the lifting frame, and the friction wheel is connected to the output shaft of the driving motor.

[0008] Furthermore, the moving assembly also includes auxiliary wheels, which are symmetrically rotatably connected to the fixed block and the lifting frame.

[0009] Furthermore, a gap is left between the two fixed blocks, a straight hole is opened on the lifting frame, and the straight hole is horizontally aligned with the gap, and the first distance sensors on the lifting block and the moving block are respectively located directly below the straight hole and the gap.

[0010] Furthermore, the protective component includes a fixed frame, a conical block and a pull rope. The fixed frame is connected to the top of the drone body, the conical block is connected to the bottom of the mounting plate, and the conical block is located inside the fixed frame. Grooves are symmetrically opened on the side of the conical block. The pull rope is arranged in the groove, and the two ends of the pull rope are respectively connected to the fixed frame and the conical block.

[0011] Furthermore, the protection component also includes a connecting column and a buffer spring. The connecting column is symmetrically connected to the inner wall of the fixed frame, and the two ends of the buffer spring are respectively connected to the conical block and the connecting column.

[0012] Furthermore, it also includes a fixing plate, a pressure sensor and a protection pad, the fixing plate is symmetrically connected to the top of the mounting plate, the pressure sensor is installed on the side of the fixing plate, and the protection pad is connected to the side of the pressure sensor.

[0013] The present invention has the following advantages: 1. The present invention can automatically complete the positioning and height measurement of the measuring point through the test device carried by the drone, without the need to manually use the total station to align the reflective sheet for height measurement multiple times, which can improve work efficiency and avoid errors caused by human operation, thereby ensuring the accuracy of the measurement data.

[0014] 2. The present invention can ensure that the fixed block and the lifting frame on the drone body are parallel to the crossbeam through the action of the pressure sensor, and prevent the mounting plate and the moving block from being separated from the crossbeam during the subsequent horizontal movement. Subsequently, through the cooperation of the second electromagnet, the driving motor and the friction wheel, the mounting plate and the moving block can be driven to move along the bottom of the crossbeam respectively, so as to facilitate the control of the first distance sensor to align with each test point.

[0015] 3. The present invention can provide a certain space for the drone body to take off through the function of the protective component, prevent the drone body from colliding with the crossbeam, and correct the swing angle of the drone body when taking off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure on the mounting plate of the present invention.

[0018] Figure 3 It is a schematic diagram of the installation of the spring block of the present invention.

[0019] Figure 4 It is a schematic diagram of the installation of the mobile assembly of the present invention.

[0020] Figure 5 It is a schematic diagram of the specific structure of the fixing block and the lifting frame of the present invention.

[0021] Figure 6 It is a schematic diagram of the installation of the protective component of the present invention.

[0022] Figure 7 It is a schematic diagram of the separation structure of the mounting plate, the fixing frame and the conical block of the present invention.

[0023] Figure 8 It is a schematic diagram of the installation of the fixing plate of the present invention.

[0024] Fig. 9 The figure is a schematic diagram of the specific structure of the fixing plate, the pressure sensor and the protection pad of the present invention.

[0025] The meaning of the reference numerals in the figure: 001-column, 002-crossbeam, 1-UAV body, 2-mounting plate, 201-controller, 202-spring block, 3-lifting block, 4-moving block, 5-first distance sensor, 6-first electromagnet, 7-second distance sensor, 8-first electric push rod, 9-receiver, 10-transmitter, 11-fixed block, 1101-gap, 12-second electric push rod, 13-lifting frame, 1301-slotted hole, 14-second electromagnet, 15-drive motor, 16-friction wheel, 17-auxiliary wheel, 18-fixed frame, 19-conical block, 1901-groove, 20-pull rope, 21-connecting column, 22-buffer spring, 23-fixed plate, 24-pressure sensor, 25-protection pad. DETAILED DESCRIPTION

[0026] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] Embodiment: This application draws on the principle of a wall-climbing robot (all-terrain detection robot) and uses magnetic adsorption to overcome gravity and friction, which can ensure that the application will not fall under the beam and can ensure that the application moves smoothly under the beam; a building steel structure deflection test device, such as Figure 1-Figure 7As shown, it includes a drone body 1, a mounting plate 2, a controller 201, a spring block 202, a lifting block 3, a moving block 4, a first distance sensor 5, a first electromagnet 6, a second distance sensor 7, a lifting component, a moving component and a protective component. A mounting plate 2 is arranged above the drone body 1, and a controller 201 is installed on the top front side of the mounting plate 2. The controller 201 is additionally equipped with a handheld control panel (not shown in the figure). Through the cooperation of the handheld control panel and the controller 201, the electrical components of the device can be driven to work. A lifting block 3 is placed in the middle of the top of the mounting plate 2, and the lifting block 3 is located at the rear side of the controller 201. A placement groove is opened on both sides of the mounting plate 2. The shape of the placement groove is a cone, that is, the width of the placement groove gradually decreases from top to bottom, and spring blocks 2 are installed on both sides of the placement groove. 02, a moving block 4 is placed in each of the two placement grooves, the lower outer wall of the moving block 4 is fitted with the inner wall of the placement groove, and circular grooves compatible with the spring block 202 are opened on the front and rear sides of the moving block 4, and the spring block 202 is stuck in the circular groove to limit the moving block 4. During the flight of the drone body 1, it can prevent the moving block 4 from being separated from the placement groove. A first distance sensor 5 is installed in the middle of the top of the lifting block 3 and the tops of the two moving blocks 4. The number of the first distance sensors 5 is three, and a first electromagnet 6 is installed on the side where the two moving blocks 4 are away from each other, and a second distance sensor 7 is installed on the side where the two moving blocks 4 are close to each other. The lifting component is used to drive the lifting block 3 to lift, the moving component is used to drive the mounting plate 2 and the moving block 4 to move, and the protective component is used to protect the drone body 1.

[0028] like Figure 2 As shown, the lifting assembly includes a first electric push rod 8 and a photoelectric sensor. The first electric push rod 8 is installed in the middle of the bottom of the mounting plate 2, and the telescopic rod of the first electric push rod 8 slides through the top of the mounting plate 2 and is connected to the bottom of the lifting block 3, so that the first electric push rod 8 can drive the lifting block 3 to lift and lower. The photoelectric sensor is composed of a receiver 9 and a transmitter 10. The receiver 9 is installed on the side where the two moving blocks 4 are close to each other. The receiver 9 is located in front of the second distance sensor 7. The transmitters 10 are installed on the left and right sides of the lower part of the lifting block 3, and the two transmitters 10 correspond to the two receivers 9 one by one.

[0029] like Figure 4 and Figure 5As shown, the moving assembly includes a fixed block 11, a second electric push rod 12, a lifting frame 13, a second electromagnet 14, a driving motor 15, a friction wheel 16 and an auxiliary wheel 17. The front and rear sides of the top of the mounting plate 2 are connected with the fixed blocks 11, and a gap 1101 is left between the sides of the upper parts of the two fixed blocks 11 that are close to each other. The first distance sensor 5 on the lifting block 3 is located directly below the gap 1101. Two second electric push rods 12 are installed on the two moving blocks 4. The upper parts of the two moving blocks 4 are slidably connected with the lifting frame 13, and the telescopic rod of the second electric push rod 12 is connected to the bottom of the lifting frame 13 for controlling the lifting of the lifting frame 13. The top of the fixed block 11 is flush with the top of the lifting frame 13. The two lifting frames 13 are A straight hole 1301 is opened in the middle of the upper part, and the straight hole 1301 is horizontally aligned with the gap 1101. The first distance sensor 5 on the moving block 4 is located directly below the straight hole 1301. The second electromagnet 14 is symmetrically installed on the upper part of the fixed block 11 and the upper part of the lifting frame 13. The upper parts of the two fixed blocks 11 are connected to a driving motor 15, and the output shaft of the driving motor 15 is connected to two friction wheels 16. The upper part of the lifting frame 13 is symmetrically installed with a driving motor 15 front and back, and the output shaft of the driving motor 15 is connected to a friction wheel 16, and the top surface of the friction wheel 16 protrudes from the top of the fixed block 11 and the top of the lifting frame 13 respectively. The top of the fixed block 11 and the top of the lifting frame 13 are also symmetrically rotatably connected with auxiliary wheels 17.

[0030] like Figure 6 and Figure 7 As shown, the protective component includes a fixed frame 18, a conical block 19, a pull rope 20, a connecting column 21 and a buffer spring 22. The top of the drone body 1 is connected to the fixed frame 18, the bottom of the mounting plate 2 is connected to the conical block 19, and the outer wall of the conical block 19 is fitted with the inner wall of the fixed frame 18. Grooves 1901 are opened on the front, back, left and right sides of the conical block 19. Pull ropes 20 are arranged in the four grooves 1901, and the two ends of the pull rope 20 are respectively connected to the fixed frame 18 and the conical block 19. Two connecting columns 21 are connected to the front, back, left and right sides of the inner wall of the fixed frame 18, and buffer springs 22 are connected between the connecting columns 21 and the conical block 19.

[0031] like Figure 8 and Fig. 9 As shown, it also includes a fixing plate 23, a pressure sensor 24 and a protection pad 25. The fixing plate 23 is symmetrically connected to the front side of the top of the mounting plate 2, the pressure sensor 24 is installed on the rear side of the fixing plate 23, and the protection pad 25 is connected to the rear side of the pressure sensor 24.

[0032] First, before installing the crossbeam 002, three test points are selected (two of which are at the left and right ends of the crossbeam 002), and then the crossbeam 002 is installed on the column 001. After the crossbeam 002 is installed, the drone body 1 is controlled to move to the front and lower part of the crossbeam 002, and then the drone body 1 is controlled to move backward and gradually approach the crossbeam 002. The drone body 1 can drive the fixing plate 23 to move backward, and the fixing plate 23 can drive the pressure sensor 24 and the protection pad 25 to move backward. When the protection pad 25 contacts the crossbeam 002, the corresponding pressure The sensor 24 will detect the pressure, and the pressure sensor 24 will send a signal. After receiving the signal, the controller 201 will display on the handheld control panel that the corresponding protection pad 25 has been in contact with the beam 002. The angle of the drone body 1 can be adjusted manually by viewing the displayed information on the handheld control panel. When both protection pads 25 are in contact with the beam 002, it means that the fixed block 11 and the lifting frame 13 on the drone body 1 are in a parallel state with the beam 002. The protection pad 25 is used to protect the pressure sensor 24 from damage; then the drone body 1 is controlled to rise, and the drone body 1 can drive the mounting plate 2 to move upward, and the mounting plate 2 can drive the fixed block 11 and the lifting frame 13 to move upward until the friction wheel 16 and the auxiliary wheel 17 on the fixed block 11 and the lifting frame 13 are in contact with the bottom of the beam 002. Then the second electromagnet 14 can be controlled by the controller 201 to start working. The second electromagnet 14 can absorb the beam 002 through magnetic force to fix the mounting plate 2 under the beam 002. At this time, the drone body 1 can be controlled to stop running, and the drone body 1 will be The self-gravity falls down for a distance, so as to drive the fixing frame 18 to move downward and separate from the conical block 19. The fixing frame 18 can pull the lower end of the pull rope 20 to move downward to be straightened. Under the action of the pull rope 20, the drone body 1 can be suspended, so that the drone body 1 is in a suspended state to prevent the drone body 1 from falling to the ground. At the same time, the buffer spring 22 will be gradually stretched by the tension, and the buffer spring 22 plays a buffering role, so as to prevent the conical block 19 from being subjected to excessive downward pulling force and causing the mounting plate 2 to fall when the pull rope 20 is straightened.Then, the driving motor 15 on the lifting frame 13 can be controlled by the controller 201 to start working. The driving motor 15 can drive the friction wheel 16 to rotate. Through the friction between the friction wheel 16 and the beam 002, the lifting frames 13 and the moving blocks 4 on the left and right sides can be driven to move to the left and right sides respectively, so that the moving blocks 4 are separated from the spring blocks 202 on the mounting plate 2. The spring blocks 202 can release the limit on the moving blocks 4, and the auxiliary wheels 17 can also roll at the bottom of the beam 002 to assist the movement of the moving blocks 4 until the two moving blocks 4 move to the left and right ends of the beam 002 respectively. At this time, the first electromagnet 6 on the moving block 4 will The columns 001 on both sides are in contact, and then the controller 201 controls the driving motor 15 on the lifting frame 13 to stop working, the friction wheel 16 stops rotating, and at the same time the controller 201 controls the first electromagnet 6 to start working, the first electromagnet 6 can be adsorbed on the side of the column 001 through magnetic force, and the controller 201 controls the second electromagnet 14 on the lifting frame 13 to stop working, so that the magnetic force of the second electromagnet 14 on the lifting frame 13 disappears, and then the controller 201 controls the second distance sensor 7 to start working, the second distance sensor 7 can detect the distance between it and the lifting block 3, and then according to the three test pieces selected before The controller 201 can control the driving motor 15 on the fixed block 11 to start working, so as to drive the fixed block 11 to move to the position directly below the test point on the beam 002. At this time, the distance detected by the second distance sensor 7 is consistent with the preset value, and the second distance sensor 7 will send a signal. After receiving the signal, the controller 201 will control the driving motor 15 on the fixed block 11 to stop working, and the fixed block 11 will stop moving. At this time, the three first distance sensors 5 are respectively located directly below the three test points on the beam 002; then the controller 201 controls the first distance sensor 5 to start working, and the three first distance sensors 5 are respectively located directly below the three test points on the beam 002. The distance sensor 5 can detect the distance between it and the bottom of the beam 002 through the straight hole 1301 and the gap 1101 respectively, and can upload the detected value to the handheld control panel through the controller 201 for display. The value is recorded as the initial value, and then the first distance sensor 5 is controlled to stop working by the controller 201, and then the second electric push rod 12 is controlled by the controller 201 to drive the lifting frame 13 to move downward. The lifting frame 13 can drive the friction wheel 16 and the auxiliary wheel 17 thereon to move downward and separate from the bottom of the beam 002. It should be emphasized that at this time, the position of the first distance sensor 5 on the moving block 4 does not change;Then, according to the predetermined loading scheme, a load is applied to the beam 002. At this time, the beam 002 will sink and deform. Since the mounting plate 2 and the fixing block 11 are always suspended on the beam 002, the first distance sensor 5 on the lifting block 3 may change its position in the vertical direction due to the sinking and deformation of the beam 002. At this time, the first electric push rod 8, the receiver 9 and the transmitter 10 can be controlled by the controller 201 to start working. The first electric push rod 8 can drive the lifting block 3 to gradually rise. The lifting block 3 can drive the first distance sensor 5 and the transmitter 10 thereon to move upward, and the transmitter 10 can emit a laser in the direction of the receiver 9. When the transmitter 10 is horizontally aligned with the receiver 9, the receiver 9 The laser emitted by the transmitter 10 will be received, and the photoelectric sensor will send a signal at this time. After receiving the signal, the controller 201 will control the first electric push rod 8, the receiver 9 and the transmitter 10 to stop working. At this time, the first distance sensor 5 on the lifting block 3 can return to the initial position, and then the controller 201 controls the first distance sensor 5 to start working. The first distance sensor 5 can detect the distance between it and the bottom of the beam 002, and can upload the detection value to the handheld control panel through the controller 201 for display. The value is recorded as the final value, and then by comparing the initial value with the final value, the height difference of each measuring point before and after loading can be known, so that the settlement displacement value of each measuring point can be calculated, and finally The deflection of the building steel structure is calculated using a specific formula, so there is no need to manually use the total station to align the reflective sheet multiple times for height measurement. The operation is simple, and no human measurement error is introduced, which can ensure the accuracy of the measurement data; then the controller 201 controls the second electric push rod 12 to drive the lifting frame 13 to rise, so that the friction wheel 16 and the auxiliary wheel 17 on the lifting frame 13 can contact the bottom of the beam 002 again, and then the controller 201 controls the second electromagnet 14 on the lifting frame 13 to start working to absorb the beam 002 in the air, and controls the first electromagnet 6 to stop working, and then the controller 201 controls the driving motor 15 on the lifting frame 13 to drive the friction wheel 16 to rotate, so as to drive the moving blocks 4 on the left and right sides to move forward Move and reset in the direction close to the mounting plate 2, and the spring block 202 in the placement groove can re-limit the moving block 4 (existing technology, no more details are given), and finally control the drone body 1 to work. At this time, the fixed frame 18 and the conical block 19 are in a separated state, leaving enough space for the drone body 1 to take off. Under the action of the pull rope 20, the drone body 1 will not deflect too seriously, and when the drone body 1 drives the fixed frame 18 to rise, the buffer spring 22 will gradually return to its original state, and the edge of the conical block 19 will squeeze the inner wall of the fixed frame 18, so that the fixed frame 18 rotates to align with the conical block 19, and finally the controller 201 controls all the second electromagnets 14 to stop working, so that the drone body 1 can land safely. ;

[0033] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A building steel structure deflection testing device, comprising a drone body (1), characterized in that: The device also comprises a mounting plate (2), a controller (201), a spring clamping block (202), a lifting block (3), a moving block (4), a first distance sensor (5), a first electromagnet (6), a second distance sensor (7), a lifting component, a moving component and a protective component. The mounting plate (2) is arranged above the drone body (1), the controller (201) is mounted on the top of the mounting plate (2), the spring clamping block (202) is symmetrically mounted on the mounting plate (2), the lifting block (3) is placed on the top of the mounting plate (2), and the moving block (4) is symmetrically slidably connected to the mounting plate (2). The first distance sensor (5) is mounted on both sides of the mounting plate (2), and the spring clamping block (202) clamps the moving block (4); the first distance sensor (5) is mounted on the top of the lifting block (3) and the moving block (4), respectively; the first electromagnet (6) is mounted on the side of the moving block (4); the second distance sensor (7) is mounted on the moving block (4); the lifting component is used to drive the lifting block (3) to lift; the moving component is used to drive the mounting plate (2) and the moving block (4) to move; and the protection component is used to protect the drone body (1); the lifting component includes a first electric push rod (8) and A photoelectric sensor, a first electric push rod (8) is mounted on the bottom of a mounting plate (2), and a telescopic rod of the first electric push rod (8) slides through the top of the mounting plate (2) and is connected to the bottom of a lifting block (3), the photoelectric sensor is composed of a receiver (9) and a transmitter (10), and the receiver (9) and the transmitter (10) are respectively mounted on the lifting block (3) and the moving block (4); the moving assembly includes a fixed block (11), a second electric push rod (12), a lifting frame (13), a second electromagnet (14), a drive motor (15) and a friction wheel (1 6), two fixed blocks (11) are symmetrically connected to the top of the mounting plate (2), a second electric push rod (12) is mounted on the moving block (4), a lifting frame (13) is slidably connected to the moving block (4), and a telescopic rod of the second electric push rod (12) is connected to the lifting frame (13), a second electromagnet (14) is symmetrically mounted on the fixed block (11) and the lifting frame (13), a driving motor (15) is also symmetrically mounted on the fixed block (11) and the lifting frame (13), and a friction wheel (16) is connected to an output shaft of the driving motor (15).

2. A building steel structure deflection testing device as claimed in claim 1, characterized in that: The moving assembly also includes auxiliary wheels (17), which are symmetrically rotatably connected to the fixed block (11) and the lifting frame (13).

3. A building steel structure deflection testing device as claimed in claim 2, characterized in that: A gap (1101) is left between the two fixed blocks (11), a straight hole (1301) is opened on the lifting frame (13), and the straight hole (1301) is horizontally aligned with the gap (1101), and the first distance sensor (5) on the lifting block (3) and the moving block (4) is respectively located directly below the straight hole (1301) and the gap (1101).

4. A building steel structure deflection testing device as claimed in claim 3, characterized in that: The protective component comprises a fixing frame (18), a conical block (19) and a pull rope (20), wherein the fixing frame (18) is connected to the top of the drone body (1), the conical block (19) is connected to the bottom of the mounting plate (2), and the conical block (19) is located inside the fixing frame (18), and grooves (1901) are symmetrically formed on the side of the conical block (19), the pull rope (20) is arranged in the groove (1901), and the two ends of the pull rope (20) are respectively connected to the fixing frame (18) and the conical block (19).

5. A building steel structure deflection testing device as claimed in claim 4, characterized in that: The protection component also includes a connecting column (21) and a buffer spring (22). The connecting column (21) is symmetrically connected to the inner wall of the fixed frame (18), and the two ends of the buffer spring (22) are respectively connected to the conical block (19) and the connecting column (21).

6. A building steel structure deflection testing device as claimed in claim 5, characterized in that: It also includes a fixing plate (23), a pressure sensor (24) and a protection pad (25), wherein the fixing plate (23) is symmetrically connected to the top of the mounting plate (2), the pressure sensor (24) is mounted on a side of the fixing plate (23), and the protection pad (25) is connected to a side of the pressure sensor (24).

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