Arch bridge deflection measuring equipment

Abstract

The invention discloses arch bridge deflection measuring equipment, and relates to the technical field of bridge deflection measurement. Displacement releasing parts are arranged on the two sides of the laser position measuring part, and the displacement releasing parts are movably connected with the double-station hanging connection structure in a matched mode; the displacement releasing part is in a vertical long groove shape, a first trapezoidal block is arranged at the top end of the displacement releasing part, a second trapezoidal block is arranged at the bottom end of the displacement releasing part, a double-inclined-plane block sliding in the groove is arranged in the middle of the displacement releasing part, inclined planes of the first trapezoidal block and the second trapezoidal block are located on the upper portion, inclined planes are arranged on the upper portion and the lower portion of the double-inclined-plane block, and an embedding groove is formed in the lower portion of the first trapezoidal block; the straight face of the extrusion block abuts against the lower face of the first trapezoidal block in a clamped mode, the upper inclined face of the double-inclined-face block can be embedded into the embedding groove in shape to form an embedding body, and the extrusion block can slide through the embedding body to be separated from the displacement disengaging part. The laser position measuring part can be flexibly and rapidly placed through the unmanned aerial vehicle, three-dimensional construction of all point positions of the bridge body is carried out, and the deflection of the arch bridge is rapidly and efficiently measured.

Description

Technical Field

[0001] The invention relates to the technical field of bridge deflection measurement, and in particular to an arch bridge deflection measurement device. Background Art

[0002] The measurement of bridge deflection value is an important measurement item in the process of bridge structure safety inspection. Deflection is an important indicator for evaluating bridge safety, which directly reflects whether the deformation of the bridge structure exceeds the dangerous range. Therefore, the size of the deflection value directly reflects the vertical overall stiffness of the bridge structure. After measuring the deflection values ​​of each key section of the bridge, the vertical deformation curve of the bridge can be further obtained to determine whether the deflection of each key section of the bridge is within the safe range, thereby determining the overall safety of the bridge. Most large-span railway bridges cross large rivers and canyons. Traditional railway bridge deflection measurements mostly use the method of spring wire pulling. When there is water under the bridge or there is no fixed point, rulers, theodolites or total stations are often used for measurement. These methods require personnel to carry the equipment and perform measurement operations manually. When performing measurement operations on large-span arch bridges, personnel need to frequently carry the equipment, which is very labor-intensive and inefficient. Summary of the invention

[0003] Technical problem to be solved by the invention

[0004] In view of the technical problems that the existing bridge deflection measurement requires frequent transportation of equipment, which is very labor-intensive and inefficient, the present invention provides an arch bridge deflection measurement device, which can flexibly and quickly place a laser positioning part through a drone, perform three-dimensional construction of various points on the bridge body, and quickly and efficiently measure the deflection of the arch bridge.

[0005] Technical Solution

[0006] To solve the above problems, the technical solution provided by the present invention is:

[0007] An arch bridge deflection measuring device comprises an unmanned aerial vehicle (UAV) main body, which is provided with a double-station hanging structure and can be movably connected to a laser positioning part, wherein the double-station hanging structure comprises a bridge and a guide cover, wherein the guide cover is connected to the two ends of the bridge, wherein a retractable and movable extrusion block is elastically connected in the guide cover, wherein the extrusion block is trapezoidal and the inclined surface is located at the bottom; a laser positioning part, wherein both sides of the laser positioning part are provided with a displacement release part, wherein the displacement release part is movably connected with the double-station hanging structure; and the displacement release part is vertically arranged. It is in the shape of a long groove, with a first trapezoidal block at the top, a second trapezoidal block at the bottom, and a double-bevel block sliding in the groove in the middle. The bevels of the first trapezoidal block and the second trapezoidal block are both located at the top, and the double-bevel block is provided with bevels at the top and bottom. The bottom of the first trapezoidal block is provided with a fitting groove, and the straight surface of the extrusion block is engaged with the bottom of the first trapezoidal block. The upper bevel of the double-bevel block can be fitted with the shape of the fitting groove to form a fitting body, and the extrusion block can slide over the fitting body to disengage from the displacement disengaging portion.

[0008] The main body of the drone serves as the mobile platform of the entire system and is responsible for transporting the laser positioning unit to the designated location. The guide cover is installed at both ends of the bridge frame, and a retractable and movable extrusion block is installed inside, which is used to dock and separate with the displacement release part on the laser positioning unit. The laser positioning unit is equipped with a laser ranging sensor for accurate distance measurement and is a key component for achieving deflection measurement. Displacement release parts are provided on both sides and are used in conjunction with the double-station hoisting structure. The displacement release part is in the shape of a vertical long groove and contains multiple trapezoidal blocks and a double-bevel block. These components work together to allow the laser positioning unit to be carried by the drone to the predetermined position, and then moved in the vertical direction through the double-station hoisting structure to be manually separated from the drone and stably placed on the bridge deck for measurement.

[0009] Optionally, the lower slope of the double slope block has the same offset angle as the upper slope, but the lower slope is longer.

[0010] When the extrusion block moves upward to disengage from the displacement disengaging portion, the double-slope block engages with the first trapezoidal block. The longer lower slope of the double-slope block prevents the extrusion block from contacting and engaging with the first trapezoidal block when moving upward, making the entire process smoother.

[0011] Optionally, the slope of the extrusion block is longer than the lower slope of the double slope block.

[0012] When the extrusion block moves downward and engages with the lower slope of the double-slope block to push the double-slope block upward, the lateral thrust generated by the slope of the extrusion block and the upper slope of the double-slope block is needed to press the extrusion block into the guide cover so that the extrusion block can move to the bottom of the double-slope block. If the slope of the extrusion block is too short, it will be stuck with the tip of the double-slope block, making the extrusion block unable to move.

[0013] Optionally, the bridge is connected to a first electric telescopic rod and is connected to a mounting frame, and the mounting frame is fixed to the drone body.

[0014] The first electric telescopic rod is used to vertically move the bridge frame to realize the vertical movement of the guide cover to control the disengagement and engagement of the displacement disengaging portion.

[0015] Optionally, the displacement and disengagement part is connected to the shell of the laser positioning part, a wireless communication module is provided in the laser positioning part, the shell is connected to a leveling part, the leveling part is connected to an elevation support part, the elevation support part is connected to a rotating part, and the rotating part is connected to a laser rangefinder.

[0016] The shell is the external protection structure of the laser positioning unit, and various electronic components and sensors are installed inside. A displacement release part is connected to one side of the shell, which is used to cooperate with the double-station lifting structure of the drone to realize the installation and uninstallation of the laser positioning unit.

[0017] The wireless communication module is integrated into the housing of the laser positioning unit and is used to exchange data with the ground station or other control equipment. This allows the laser positioning unit to transmit measurement data in real time, which is convenient for remote monitoring and data analysis. The leveling unit is connected to the bottom of the housing of the laser positioning unit to ensure that the laser rangefinder is in a horizontal state after placement. This is essential to ensure the accuracy of the measurement results, especially on uneven or inclined bridge decks. The raised support unit is connected to the bottom of the leveling unit, and the height of the laser rangefinder can be adjusted as needed. This can avoid the influence of ground obstacles on the measurement, and can also adapt to the measurement needs of different heights. The rotating unit is installed at the bottom of the raised support unit, allowing the laser rangefinder to rotate within a certain range. This design allows the laser rangefinder to measure from multiple angles, increasing the flexibility and coverage of the measurement. The laser rangefinder is installed at the end of the rotating unit and is the core measurement tool of the entire system. It measures the distance to the target by emitting and receiving laser beams, thereby calculating the deflection of the arch bridge.

[0018] Optionally, a rotating shielding part is connected to the top of the shell, and the rotating shielding part includes four groups of track frames fixed to the shell, the track frame is slidably connected with a linkage block, the linkage block is fixedly connected with a shielding plate, the linkage block is fixedly connected with a protruding shaft, the shell is fixedly connected with a first motor, the output shaft of the first motor is fixedly connected with a first gear, the shell is rotatably connected with a driving frame, four groups of driving grooves are opened on the driving frame, the driving grooves are slidably connected with the protruding shaft, the driving frame is fixedly connected with a gear ring, and the gear ring is meshed with the first gear.

[0019] The shielding plate can completely cover the laser rangefinder when it is not in use, preventing dust, rain and other external factors from damaging the laser rangefinder and extending the service life of the equipment. The shielding plate can be automatically deployed and retracted through the motor and gear transmission system, which is easy to operate and does not require manual intervention. The design of the track frame and drive slot ensures the precise sliding of the linkage block, thereby ensuring the smooth and reliable movement of the shielding plate. The shielding plate is designed to adapt to different environmental conditions and can effectively protect the laser rangefinder in both dry and humid environments.

[0020] Optionally, the leveling part includes a disc table fixedly connected to the shell, a center rod fixedly installed in the middle of the disc table, the center rod fixedly connected to a first sphere, the first sphere is rotatably connected to a synchronous frame, the synchronous frame is fixedly connected to a deflection frame, the deflection frame is connected to the lifting support part, the disc table is fixedly connected to multiple groups of second electric telescopic rods, the movable end of the second electric telescopic rod is fixedly connected to a second sphere, and the second sphere is abutted against the deflection frame.

[0021] Through the fine adjustment of the electric telescopic rod, high-precision leveling can be achieved to ensure that the laser rangefinder is always in a horizontal state. The leveling process is automatically completed by the built-in inclination sensor and controller, without manual intervention, which improves work efficiency. No matter how uneven the ground is, the leveling unit can automatically adjust to ensure the accuracy of the measurement results. Through the design of the sphere and the electric telescopic rod, the leveling mechanism has a compact structure, occupies little space, and is easy to integrate into the laser positioning unit.

[0022] Optionally, the lifting support part includes four groups of slides that are slidably connected to the deflection frame, the four groups of slides are commonly fixedly connected to a motor platform, the motor platform is connected to the rotating part, the motor platform is movably connected to the shielding plate, the deflection frame is fixedly connected to two groups of second motors, the output shaft of the second motor is fixedly connected to a second gear, and the second gear is meshingly connected to a rack fixedly connected to the slide.

[0023] The electric telescopic rod and gear rack transmission system can achieve precise adjustment of height and angle, ensuring the stability and accuracy of the laser distance meter in different environments. Not only can the height be adjusted in the vertical direction, but the angle and rotation can also be adjusted in the horizontal direction, increasing the flexibility and coverage of the measurement. The entire adjustment process is automatically completed by the controller without manual intervention, which improves work efficiency and measurement accuracy. The shielding plate design can protect the laser distance meter when not in use and extend the service life of the equipment.

[0024] Optionally, the rotating part includes a third motor fixedly connected to the motor platform, the output shaft of the third motor is fixedly connected to the rotating platform, the rotating platform is fixedly connected to the laser rangefinder, and the rotating platform is fixedly connected to the fixed seat.

[0025] The motor platform is fixedly connected to the slide plate of the lifting support part, and is used to install and drive the rotating part. The third motor is fixed on the motor platform, and is used to drive the rotation of the rotating platform. The rotating platform is fixedly connected to the output shaft of the third motor, and is used to install the laser rangefinder, so that it can rotate with the rotating platform. The laser rangefinder is fixed on the rotating platform and rotates with the rotating platform to achieve multi-angle measurement. The fixed seat is fixedly connected to the rotating platform, and is used to stabilize and support the rotating platform to ensure stability during rotation.

[0026] Optionally, the rotating part is connected to a fixed seat compatible with the laser rangefinder, the fixed seat is fixedly connected to a first photosensitive probe, the fixed seat is fixedly connected to multiple groups of second photosensitive probes, the multiple groups of second photosensitive probes are arranged at equal intervals along the circumferential direction with the first photosensitive probe as the center, and the fixed seat is fixedly connected to a light shield.

[0027] The fixed seat is fixedly connected to the turntable and is used to install the laser rangefinder and other related components. The first photosensitive probe is fixed on the fixed seat and is used to detect the initial position or reference position of the laser rangefinder. Multiple groups of second photosensitive probes are fixed on the fixed seat and are arranged at equal intervals along the circumference with the first photosensitive probe as the center, and are used to detect the rotation angle of the turntable. Multiple groups of second photosensitive probes are arranged at equal intervals along the circumference with the first photosensitive probe as the center, and are used to detect the rotation angle of the turntable. When the turntable rotates, each time it passes the position of a second photosensitive probe, the probe will send a signal to the controller to record the current rotation angle. Through the distribution of multiple second photosensitive probes, the rotation angle of the turntable can be accurately measured and controlled. The light shield is fixed on the fixed seat to protect the photosensitive probe, prevent interference from external light, and ensure the accuracy of detection.

[0028] Beneficial Effects

[0029] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0030] When the technical solution provided by the present invention is in use, the main body of the drone moves the positions of the two groups of laser positioning parts by driving the double-station hanging structure to move. As the double-station hanging structure is separated from the displacement release part, the shell falls on the bridge deck, thereby completing the placement operation of the two groups of laser positioning parts, and then the rotating shielding part performs an automatic unfolding operation, the leveling part performs an automatic leveling operation, the lifting support part adjusts the height of the rotating part, and the rotating part adjusts the position of the laser rangefinder and the fixed seat, so that the ranging laser emitted by the laser rangefinder of one group of laser positioning parts directly hits the first photosensitive probe of the other group of laser positioning parts, the second wireless communication module transmits the height value of the lifting support part and the distance measured by the laser rangefinder to the first wireless communication module, and then the first wireless communication module transmits the data to the remote control center to perform three-dimensional construction of each point of the bridge body, thereby performing bridge deflection measurement operations. The present invention uses the drone body to move the double-station lifting structure to place two groups of laser positioning parts, and then uses the two groups of laser positioning parts to position each other to perform surveying and mapping operations on various points of the arch bridge, thereby completing the arch bridge deflection measurement operation, avoiding personnel from reciprocating equipment handling operations and manual measurement operations, and measuring the arch bridge deflection quickly and efficiently, saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of an arch bridge deflection measuring device from an oblique top view proposed by an embodiment of the present invention;

[0032] Figure 2 A schematic structural diagram of a side view of an arch bridge deflection measuring device proposed in an embodiment of the present invention;

[0033] Figure 3 One of the perspectives of the cross-sectional structural schematic diagram of the laser positioning portion of an arch bridge deflection measurement device proposed in an embodiment of the present invention;

[0034] Figure 4 A second perspective diagram of the cross-sectional structure of a laser positioning unit of an arch bridge deflection measurement device proposed in an embodiment of the present invention;

[0035] Figure 5 One of the perspectives of the structural schematic diagram of the leveling part of the arch bridge deflection measuring device proposed in the embodiment of the present invention;

[0036] Figure 6 A second perspective diagram of the structure of a leveling part of an arch bridge deflection measuring device proposed in an embodiment of the present invention;

[0037] Figure 7 A schematic structural diagram of a rotating shielding portion of an arch bridge deflection measuring device proposed in an embodiment of the present invention;

[0038] Figure 8A schematic structural diagram of a displacement and release portion of an arch bridge deflection measuring device proposed in an embodiment of the present invention;

[0039] 1. UAV body; 2. First wireless communication module; 3. Heading camera; 4. Dual-station lifting structure; 5. Laser positioning unit; 6. Displacement release unit; 7. Shell; 8. Rotation shielding unit; 9. Second wireless communication module; 10. Leveling unit; 11. Lifting support unit; 12. Rotation unit; 13. Laser rangefinder; 14. Fixing seat; 15. First photosensitive probe; 16. Second photosensitive probe; 17. Light shield; 18. Mounting frame; 19. Support leg; 20. First electric telescopic rod; 21. Bridge; 22. Guide cover; 23. Extrusion block; 24. Connecting shell; 25. First trapezoidal block; 26. The second trapezoidal block; 27, guide strip; 28, double-bevel block; 29, track frame; 30, linkage block; 31, shielding plate; 32, protruding shaft; 33, first motor; 34, first gear; 35, drive frame; 36, drive groove; 37, gear ring; 38, disc table; 39, center rod; 40, first sphere; 41, synchronous frame; 42, deflection frame; 43, second electric telescopic rod; 44, second sphere; 45, slide plate; 46, motor table; 47, second motor; 48, second gear; 49, rack; 50, third motor; 51, rotating table; 52, electronic level; 53, fitting groove. DETAILED DESCRIPTION

[0040] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0041] Example

[0042] Combined with Figure 1 , 2 A device for measuring the deflection of an arch bridge includes a drone body 1 and a laser positioning unit 5. The drone body 1 is fixedly connected to a first wireless communication module 2, and a heading camera 3 is fixedly installed on the top of the drone body 1.

[0043] Combined with Figure 2The drone body 1 is provided with a double-station hanging structure 4 and is movably connected to the laser positioning part 5. The double-station hanging structure 4 includes a bridge 21 and a guide cover 22. The guide cover 22 is connected to both ends of the bridge 21. A retractable and movable extrusion block 23 is elastically connected in the guide cover 22. The extrusion block 23 is trapezoidal and the inclined surface is located at the bottom. The bridge 21 is connected to the first electric telescopic rod 20 and connected to the mounting frame 18. The mounting frame 18 is fixedly connected to the drone body 1. The double-station hanging structure 4 includes a mounting frame 18 fixedly connected to the drone body 1. The mounting frame 18 is fixedly connected to two groups of legs 19. The mounting frame 18 is fixedly connected to four groups of first electric telescopic rods 20. The moving ends of each two groups of first electric telescopic rods 20 are fixedly connected to a group of bridges 21. The bridge 21 is fixedly connected to two groups of guide covers 22. The guide covers 22 are fixedly connected to springs. The springs are fixedly connected to extrusion blocks 23 slidably connected to the guide covers 22. The extrusion blocks 23 are movably connected to the displacement release part 6. The drone body 1 moves the first electric telescopic rod 20 by driving the mounting frame 18 . The first electric telescopic rod 20 is used to drive the bridge frame 21 to move. The bridge frame 21 adjusts the position of the extrusion block 23 by driving the guide cover 22 .

[0044] Combined with Figure 3 , displacement and release parts 6 are arranged on both sides of the laser positioning part 5, and the displacement and release parts 6 are movably connected with the double-station hanging structure 4. Two groups of laser positioning parts 5 are connected to the double-station hanging structure 4, and the displacement and release parts 6 are movably connected with the double-station hanging structure 4. The displacement and release parts 6 are connected to the shell 7 of the laser positioning part 5, and a wireless communication module is arranged in the laser positioning part 5. The shell 7 is connected to a leveling part 10, and the leveling part 10 is connected to a lifting support part 11, and the lifting support part 11 is connected to a rotating part 12, and the rotating part 12 is connected to a laser rangefinder 13. The top of the shell 7 is connected to a rotating shielding part 8, which includes four groups of track frames 29 fixed to the shell 7. The track frame 29 is slidably connected to a linkage block 30, which is fixedly connected to a shielding plate 31, and the linkage block 30 is fixedly connected to a protruding shaft 32. The shell 7 is fixedly connected to a first motor 33, and the output shaft of the first motor 33 is fixedly connected to a first gear 34. The shell 7 is rotatably connected to a driving frame 35, and four groups of driving grooves 36 are provided on the driving frame 35. The driving grooves 36 are slidably connected to the protruding shaft 32. The driving frame 35 is fixedly connected to a gear ring 37, and the gear ring 37 is meshed with the first gear 34.

[0045] The leveling portion 10 includes a disc table 38 fixedly connected to the shell 7, a center rod 39 is fixedly installed in the middle of the disc table 38, the center rod 39 is fixedly connected to the first sphere 40, the first sphere 40 is rotatably connected to a synchronous frame 41, the synchronous frame 41 is fixedly connected to a deflection frame 42, the deflection frame 42 is connected to the lifting support portion 11, the disc table 38 is fixedly connected to multiple groups of second electric telescopic rods 43, the movable end of the second electric telescopic rod 43 is fixedly connected to the second sphere 44, and the second sphere 44 is abutted against the deflection frame 42.

[0046] Combined with Figure 4 , the lifting support part 11 is slidably connected to the four sets of slide plates 45 with the deflection frame 42, the four sets of slide plates 45 are fixedly connected to a motor platform 46, the motor platform 46 is connected to the rotating part 12, the motor platform 46 is movably connected to the shielding plate 31, the deflection frame 42 is fixedly connected to two sets of second motors 47, the output shaft of the second motor 47 is fixedly connected to the second gear 48, the second gear 48 is meshedly connected to the rack 49 fixedly connected to the slide plate 45, and there are two sets of racks 49. The second motor 47 drives the second gear 48 to rotate, the second gear 48 drives the rack 49 to move, and the rack 49 drives the motor platform 46 to move through the slide plate 45, thereby adjusting the height of the rotating part 12.

[0047] The rotating part 12 includes a third motor 50 fixedly connected to the motor platform 46 . The output shaft of the third motor 50 is fixedly connected to a rotating platform 51 . The rotating platform 51 is fixedly connected to the laser rangefinder 13 . The rotating platform 51 is fixedly connected to the fixing seat 14 .

[0048] The rotating part 12 is connected to a fixed seat 14 adapted to the laser rangefinder 13, the fixed seat 14 is fixedly connected to a first photosensitive probe 15, the fixed seat 14 is fixedly connected to multiple groups of second photosensitive probes 16, the multiple groups of second photosensitive probes 16 are arranged at equal intervals along the circumferential direction with the first photosensitive probe 15 as the center, and the fixed seat 14 is fixedly connected to a light shield 17.

[0049] Combined with Figure 5 The displacement and disengaging part 6 is connected to the shell 7, the shell 7 is connected with a rotating shielding part 8, a second wireless communication module 9 which is in communication with the first wireless communication module 2 is fixedly installed in the shell 7, the shell 7 is connected with a leveling part 10, the leveling part 10 is connected with an elevated support part 11, the elevated support part 11 is connected with a rotating part 12, the rotating part 12 is connected with a laser rangefinder 13, the rotating part 12 is connected with a fixing seat 14 which is adapted to the laser rangefinder 13, the fixing seat 14 is fixedly connected with a first photosensitive probe 15, the fixing seat 14 is fixedly connected with a plurality of groups of second photosensitive probes 16, the plurality of groups of second photosensitive probes 16 are arranged at equal intervals along the circumferential direction with the first photosensitive probe 15 as the center, the second photosensitive probe 16 and the first photosensitive probe 15 are both used to detect the laser irradiation position, and the fixing seat 14 is fixedly connected with a light shield 17.

[0050] Combined with Figure 5 , 6 The leveling part 10 includes a disk table 38 fixedly connected to the housing 7, a center rod 39 fixedly installed in the middle of the disk table 38, a first sphere 40 fixedly connected to the center rod 39, a synchronous frame 41 rotatably connected to the first sphere 40, a deflection frame 42 fixedly connected to the synchronous frame 41, an electronic level 52 fixedly connected to the deflection frame 42, the deflection frame 42 is connected to the lifting support part 11, and a plurality of second electric telescopic rods 43 fixedly connected to the disk table 38, a second sphere 44 fixedly connected to the moving end of the second electric telescopic rod 43, and the second sphere 44 abuts against the deflection frame 42. The electronic level 52 is used to measure the angle between the deflection frame 42 and the horizontal plane. According to the angle between the deflection frame 42 and the horizontal plane, the second electric telescopic rod 43 drives the second sphere 44 to move, so that the second sphere 44 pushes the deflection frame 42 to rotate, and the deflection frame 42 drives the synchronous frame 41 and the first sphere 40 to rotate. The rotating part 12 includes a third motor 50 fixedly connected to the motor platform 46, the output shaft of the third motor 50 is fixedly connected to a rotating platform 51, the rotating platform 51 is fixedly connected to the laser rangefinder 13, the rotating platform 51 is fixedly connected to the fixed seat 14, the rotating platform 51 is rotatably connected to a support wheel, and the support wheel abuts against the motor platform 46. The third motor 50 adjusts the position of the laser rangefinder 13 and the fixed seat 14 by driving the rotating platform 51 to rotate.

[0051] Combined with Figure 7 The rotating shielding portion 8 includes four groups of track frames 29 fixedly connected to the shell 7, each group of track frames 29 is composed of two parallel tracks, the track frame 29 is slidably connected with a linkage block 30, the linkage block 30 is fixedly connected with a shielding plate 31, the linkage block 30 is fixedly connected with a protruding shaft 32, the shell 7 is fixedly connected with a first motor 33, the output shaft of the first motor 33 is fixedly connected with a first gear 34, the shell 7 is rotatably connected with a driving frame 35, the driving frame 35 is provided with four groups of driving grooves 36, the driving grooves 36 are slidably connected with the protruding shaft 32, the driving frame 35 is fixedly connected with a gear ring 37, and the gear ring 37 is meshed with the first gear 34. The first motor 33 drives the first gear 34 to rotate, and the rotating first gear 34 drives the ring gear 37 to rotate, and the ring gear 37 drives the driving frame 35 to rotate, so that the driving groove 36 drives the protruding shaft 32, and the protruding shaft 32 drives the shielding plate 31 to move through the linkage block 30, so as to adjust the position of the shielding plate 31, and the shielding plate 31 is used to provide shielding for the shell 7 to prevent debris from falling directly into the shell 7.

[0052] Combined with Figure 8The displacement disengaging portion 6 is in the shape of a vertically arranged long groove, with a first trapezoidal block 25 at the top, a second trapezoidal block 26 at the bottom, and a double-bevel block 28 sliding in the groove in the middle. The bevels of the first trapezoidal block 25 and the second trapezoidal block 26 are both located at the top, and the double-bevel block 28 is provided with bevels at the top and bottom. The first trapezoidal block 25 is provided with a fitting groove 53 at the bottom, and the straight surface of the extrusion block 23 is engaged with the bottom of the first trapezoidal block 25. The upper bevel of the double-bevel block 28 and the shape of the fitting groove 53 can be fitted to form a fitting body, and the extrusion block 23 can slide through the fitting body to disengage the displacement disengaging portion 6. The lower bevel of the double-bevel block 28 has the same offset angle as the upper bevel, but the lower bevel is longer. The bevel of the extrusion block 23 is longer than the lower bevel of the double-bevel block 28.

[0053] Working principle: The extrusion block 23 can slide elastically in the guide cover 22 laterally. In the disengaged state, the extrusion block 23 is moved downward. Due to the effect of the inclined surface, the extrusion block 23 slides elastically in the guide cover 22 laterally, so that the guide cover 22 and the bridge 21 can move downward. After passing the top point, due to the effect of the spring, the extrusion block 23 is elastically reset in the guide cover 22 laterally. Figure 8 The laser positioning unit 5 is locked in position, and the drone body 1 can lift the laser positioning unit 5. When the laser positioning unit 5 is in position, it is necessary to put down the laser positioning unit 5. At this time, it is only necessary to move the extrusion block 23 downward to the bottom of the double-bevel block 28, and then move the extrusion block 23 upward. The double-bevel block 28 is pushed to the engaging groove 53 for engagement, and the extrusion block 23 slides horizontally into the guide cover 22 through the inclined surface of the lower inclined surface of the double-bevel block 28, and disengages after passing the vertex.

[0054] The displacement and disengaging part 6 includes a connecting shell 24 fixedly connected to the shell body 7, the connecting shell 24 is fixedly connected to the first trapezoidal block 25, the first trapezoidal block 25 is movably connected to the extrusion block 23, the connecting shell 24 is fixedly connected to the second trapezoidal block 26, the second trapezoidal block 26 is placed below the first trapezoidal block 25, the first trapezoidal block 25 and the second trapezoidal block 26 are jointly fixedly connected to a guide bar 27, the guide bar 27 is slidably connected to a double-bevel block 28, and the first trapezoidal block 25 is provided with an interlocking groove 53 on one side facing the double-bevel block 28. As the first electric telescopic rod 20 drives the bridge frame 21 to move toward the first trapezoidal block 25, the extrusion block 23 and the first trapezoidal block 25 are squeezed against each other. Under the push of the spring, the extrusion block 23 moves to the bottom of the first trapezoidal block 25 and abuts against the first trapezoidal block 25. At this time, as the drone body 1 rises, the double-station hanging structure 4 rises with the drone body 1. At this time, the extrusion block 23 pushes the first trapezoidal block 25, and the first trapezoidal block 25 drives the shell 7 through the connecting shell 24, thereby moving the laser positioning part 5. When the displacement release part 6 needs to be disengaged from the double-station hanging structure 4, the shell 7 is placed on the bridge deck, and the first electric telescopic rod 20 drives the bridge frame 21 to move downward. As the guide cover 22 moves downward, the extrusion block 23 moves to the second trapezoidal block 25. The extrusion block 23 and the double-slope block 28 are squeezed against each other, and then as the first electric telescopic rod 20 contracts, the extrusion block 23 pushes the double-slope block 28 to move upward, and as the upper half of the double-slope block 28 is engaged with the engaging groove 53 of the first trapezoidal block 25, the double-slope block 28 and the first trapezoidal block 25 abut against each other, and the extrusion block 23 is pressed into the guide cover 22 by the double-slope block 28 and slides over the end of the first trapezoidal block 25 of the double-slope block 28. At this time, as the first electric telescopic rod 20 contracts and the drone body 1 rises, the extrusion block 23 moves away from the first trapezoidal block 25, and the double-slope block 28 that loses support is reset under the action of gravity, thereby completing the mutual separation of the displacement release portion 6 and the double-station hanging structure 4.

[0055] Directions:

[0056] When in use, the drone body 1 moves the positions of the two groups of laser positioning parts 5 by driving the double-station hanging structure 4 to move. As the double-station hanging structure 4 separates from the displacement and unblocking part 6, the shell 7 falls on the bridge deck, thereby completing the placement of the two groups of laser positioning parts 5. Then the shielding part 8 is rotated to automatically unfold, the leveling part 10 is automatically leveled, the support part 11 is raised to adjust the height of the rotating part 12, and the rotating part 12 adjusts the position of the laser rangefinder 13 and the fixing seat 14, so that the ranging laser emitted by the laser rangefinder 13 of one group of laser positioning parts 5 is directly projected on the first photosensitive probe 15 of the other group of laser positioning parts 5. The second wireless communication module 9 transmits the height value of the raised support part 11 and the distance measured by the laser rangefinder 13 to the first wireless communication module 2, and then the first wireless communication module 2 transmits the data to the remote control center to perform three-dimensional construction of each point of the bridge body, thereby performing bridge deflection measurement operations. The present invention uses the drone body 1 to move the double-station lifting structure 4 to place two groups of laser positioning parts 5, and then positions the two groups of laser positioning parts 5 relative to each other to perform surveying and mapping of various points of the arch bridge, thereby completing the arch bridge deflection measurement operation.

[0057] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An arch bridge deflection measuring device, characterized in that: include The main body of the drone is provided with a double-station hanging structure and is movably connected to the laser positioning part. The double-station hanging structure includes a bridge and a guide cover. The guide cover is connected to both ends of the bridge. A retractable and movable extrusion block is elastically connected in the guide cover. The extrusion block is trapezoidal and the inclined surface is located at the bottom. The laser positioning part has position-changing and card-releasing parts on both sides, and the position-changing and card-releasing parts are movably connected with the double-station hanging structure; The displacement disengaging portion is in the shape of a vertically arranged long groove, with a first trapezoidal block at the top, a second trapezoidal block at the bottom, and a double-bevel block sliding in the groove in the middle. The bevels of the first trapezoidal block and the second trapezoidal block are both located at the top, and the double-bevel block is provided with bevels at the top and bottom. The bottom of the first trapezoidal block is provided with an engaging groove, and the straight surface of the extrusion block is engaged and abutted with the bottom of the first trapezoidal block. The upper bevel of the double-bevel block can be engaged with the shape of the engaging groove to form a mosaic, and the extrusion block can slide over the mosaic to disengage from the displacement disengaging portion.

2. The arch bridge deflection measuring device according to claim 1, characterized in that: The lower slope of the double slope block is offset at the same angle as the upper slope, but the lower slope is longer.

3. The arch bridge deflection measuring device according to claim 2, characterized in that: The inclined surface of the extrusion block is longer than the lower inclined surface of the double-inclined surface block.

4. The arch bridge deflection measuring device according to claim 1, characterized in that: The bridge is connected to a first electric telescopic rod and is connected to a mounting frame, and the mounting frame is fixed to the drone body.

5. The arch bridge deflection measuring device according to claim 1, characterized in that: The displacement and unblocking part is connected to the shell of the laser positioning part, a wireless communication module is arranged inside the laser positioning part, the shell is connected to a leveling part, the leveling part is connected to an elevated support part, the elevated support part is connected to a rotating part, and the rotating part is connected to a laser rangefinder.

6. The arch bridge deflection measuring device according to claim 5, characterized in that: The top of the shell is connected to a rotating shielding part, and the rotating shielding part includes four groups of track frames fixed to the shell, the track frame is slidably connected to a linkage block, the linkage block is fixedly connected to a shielding plate, the linkage block is fixedly connected to a protruding shaft, the shell is fixedly connected to a first motor, the output shaft of the first motor is fixedly connected to a first gear, the shell is rotatably connected to a driving frame, four groups of driving grooves are opened on the driving frame, the driving grooves are slidably connected to the protruding shaft, the driving frame is fixedly connected to a gear ring, and the gear ring is meshed with the first gear.

7. The arch bridge deflection measuring device according to claim 5, characterized in that: The leveling part includes a disc table fixedly connected to the shell, a center rod is fixedly installed in the middle of the disc table, the center rod is fixedly connected to a first sphere, the first sphere is rotatably connected to a synchronous frame, the synchronous frame is fixedly connected to a deflection frame, the deflection frame is connected to the lifting support part, the disc table is fixedly connected to multiple groups of second electric telescopic rods, the movable end of the second electric telescopic rod is fixedly connected to a second sphere, and the second sphere is abutted against the deflection frame.

8. The arch bridge deflection measuring device according to claim 5, characterized in that: The lifting support part includes four groups of slides that are slidably connected to the deflection frame. The four groups of slides are commonly fixedly connected to a motor platform, the motor platform is connected to the rotating part, the motor platform is movably connected to the shielding plate, the deflection frame is fixedly connected to two groups of second motors, the output shaft of the second motor is fixedly connected to a second gear, and the second gear is meshingly connected to a rack fixedly connected to the slide.

9. The arch bridge deflection measuring device according to claim 5, characterized in that: The rotating part comprises a third motor fixedly connected to the motor platform, the output shaft of the third motor is fixedly connected to the rotating platform, the rotating platform is fixedly connected to the laser rangefinder, and the rotating platform is fixedly connected to the fixing seat.

10. The arch bridge deflection measuring device according to claim 5, characterized in that: The rotating part is connected to a fixing seat adapted to the laser rangefinder, the fixing seat is fixedly connected to a first photosensitive probe, the fixing seat is fixedly connected to a plurality of groups of second photosensitive probes, the plurality of groups of second photosensitive probes are arranged at equal intervals along the circumferential direction with the first photosensitive probe as the center, and the fixing seat is fixedly connected to a light shield.

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