Spherical unmanned aerial vehicle for quantitative monitoring of corrosion of concrete structure

Abstract

The invention relates to the technical field of engineering detection, and discloses a spherical unmanned aerial vehicle for concrete structure corrosion quantitative monitoring, the spherical unmanned aerial vehicle comprises a lower annular plate and an upper annular plate, the bottom end of the lower annular plate and the top end of the upper annular plate are both provided with protection assemblies, and an unmanned aerial vehicle main body is fixedly mounted on the inner wall of the lower annular plate; a plurality of lower rotating grooves are formed in the side wall of the lower annular plate; through the design of the positioning pins and the pin holes, the relative position of the lower annular plate and the upper annular plate can be rapidly determined, the preparation time of initial assembly is greatly shortened, through the design of the rapid disassembly mechanism, on one hand, the lower annular plate and the upper annular plate are firmly fixed through cooperation of the positioning pins and the pin holes, and the internal unmanned aerial vehicle body is protected; and on the other hand, operators can quickly complete maintenance without professional tools, so that the maintenance time is greatly shortened, and the continuity of a concrete structure corrosion monitoring task is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of engineering testing technology, and in particular to a spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures. Background Technology

[0002] As the core load-bearing system of infrastructure such as buildings, bridges, tunnels, and water conservancy projects, the service life and safety of concrete structures are directly related to public safety and socio-economic stability. However, during long-term service, the steel bars inside the concrete structure are susceptible to corrosion from environmental factors, leading to a reduction in the cross-section of the steel bars and a decline in mechanical properties. This, in turn, causes cracking and spalling of the concrete protective layer, ultimately resulting in a reduction in the structural load-bearing capacity and an increase in safety hazards. Therefore, accurate, efficient, and real-time quantitative monitoring of the corrosion status of concrete structures has become a core requirement in the field of infrastructure operation and maintenance.

[0003] Current technologies for monitoring corrosion of concrete structures are mainly divided into three categories: manual inspection, fixed sensor inspection, and ordinary drone-assisted inspection. Manual inspection and fixed equipment inspection are complex to disassemble and assemble, and require long downtime.

[0004] Most existing monitoring drones have open fuselages, requiring specialized tools such as screwdrivers and wrenches for maintenance, which prolongs maintenance time and reduces efficiency. Furthermore, monitoring concrete structure corrosion often requires continuous tracking; equipment downtime directly leads to data gaps, affecting the continuity of monitoring tasks. Ordinary drones lack protective structures, making them prone to collisions with exposed rebar, concrete edges, pipes, and other obstacles during flight, resulting in propeller breakage, fuselage deformation, and equipment damage. This not only increases replacement costs but also necessitates redeploying flight paths, significantly reducing monitoring efficiency. Therefore, this paper proposes an improved spherical drone for quantitative monitoring of concrete structure corrosion. Summary of the Invention

[0005] In view of the problems of low maintenance efficiency, insufficient protection and limited monitoring efficiency of existing monitoring drones, this invention is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion of concrete structures, comprising a lower annular plate and an upper annular plate, wherein protective components are provided at the bottom end of the lower annular plate and the top end of the upper annular plate, the UAV body is fixedly installed on the inner wall of the lower annular plate, a plurality of lower rotating grooves are provided on the side wall of the lower annular plate, a plurality of upper rotating grooves are provided on the side wall of the upper annular plate, a sliding groove is provided on the inner wall of the upper rotating groove, a locking groove is provided on the inner wall of the sliding groove, and the lower annular plate includes a quick-release mechanism for easy maintenance; A base is rotatably connected to the inner wall of the lower rotating groove. A threaded rod is fixedly connected to the top of the base. A fixed cylinder is threadedly connected to the surface of the threaded rod. An anti-slip sleeve is fixedly fitted onto the surface of the fixed cylinder. A connecting column is rotatably connected to the top of the fixed cylinder. The connecting column is fitted into the inner wall of the groove. A clamping plate is fixedly connected to the top of the connecting column. The clamping plate is fitted into the inner wall of the clamping groove.

[0007] As a preferred embodiment, the lower annular plate has several pin holes at its top end, and the upper annular plate has several positioning pins fixedly connected to its bottom end, with the positioning pins fitting into the inner wall of the pin holes.

[0008] As a preferred embodiment, the protective assembly includes a connecting rod and a first spring sensor.

[0009] As a preferred embodiment, several of the connecting rods are connected by a first spring sensor, and the connecting rods and the first spring sensor are combined to form a hemispherical cage structure.

[0010] As a preferred embodiment, the ends of several connecting rods furthest from the first spring sensor are respectively connected to the lower annular plate and the upper annular plate.

[0011] As a preferred embodiment, the protective assembly further includes a second spring sensor, with a plurality of the second spring sensors circumferentially distributed on the sidewall of the lower annular plate.

[0012] As a preferred embodiment, the springs inside both the first spring sensor and the second spring sensor are trapezoidal springs.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This invention, through the design of positioning pins and pin holes, can quickly determine the relative positions of the lower and upper annular plates, significantly shortening the preparation time for initial assembly. Through the design of the quick-release mechanism, on the one hand, it works with the positioning pins and pin holes to firmly fix the lower and upper annular plates, protecting the internal drone body; on the other hand, operators can quickly complete maintenance without professional tools, greatly shortening maintenance time and ensuring the continuity of concrete structure corrosion monitoring tasks.

[0014] 2. The present invention uses a hemispherical cage structure composed of a connecting rod and a first spring sensor to reduce the impact force transmitted to the main body of the UAV, forming all-round collision protection and improving the safety of operation in complex environments. At the same time, the lower ring plate, upper ring plate and connecting rod are all made of modified plastic with good flexibility to meet the requirements of complex structure and impact resistance. The connecting rod is laid with a flexible wire, so any two first spring sensors can form an electrical circuit when they contact the concrete surface at the same time, and the detection system can realize the reading and analysis of corrosion degree data. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the split structure of the lower annular plate and the upper annular plate in this invention; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic cross-sectional view of the lower annular plate and the upper annular plate in this invention; Figure 5 for Figure 4 A magnified structural diagram at point B in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Lower annular plate; 11. Pin hole; 12. Lower rotating groove; 2. Upper annular plate; 21. Positioning pin; 22. Upper rotating groove; 23. Sliding groove; 24. Slot; 3. UAV body; 4. Protective components; 41. Connecting rod; 42. First spring sensor; 43. Second spring sensor; 5. Quick release mechanism; 51. Base; 52. Threaded rod; 53. Fixing cylinder; 54. Anti-slip sleeve; 55. Connecting column; 56. Clamping plate. Detailed Implementation

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Reference Figures 1-5 This is the first embodiment of the present invention, which provides a spherical drone for quantitative monitoring of corrosion of concrete structures, including a lower annular plate 1 and an upper annular plate 2. The bottom end of the lower annular plate 1 and the top end of the upper annular plate 2 are provided with protective components 4. The drone body 3 is fixedly installed on the inner wall of the lower annular plate 1. The side wall of the lower annular plate 1 is provided with a plurality of lower rotating grooves 12. The side wall of the upper annular plate 2 is provided with a plurality of upper rotating grooves 22. The inner wall of the upper rotating grooves 22 is provided with sliding grooves 23. The inner wall of the sliding grooves 23 is provided with slots 24. The lower annular plate 1 includes a quick-release mechanism 5 for easy maintenance. A base 51 is rotatably connected to the inner wall of the lower rotating groove 12. A threaded rod 52 is fixedly connected to the top of the base 51. A fixed cylinder 53 is threadedly connected to the surface of the threaded rod 52. An anti-slip sleeve 54 is fixedly sleeved on the surface of the fixed cylinder 53. A connecting post 55 is rotatably connected to the top of the fixed cylinder 53. The connecting post 55 is fitted into the inner wall of the sliding groove 23. A clamping plate 56 is fixedly connected to the top of the connecting post 55. The clamping plate 56 is fitted into the inner wall of the clamping groove 24. The lower annular plate 1 has several pin holes 11 at its top end, and the upper annular plate 2 has several positioning pins 21 fixedly connected to its bottom end. The positioning pins 21 are fitted into the inner wall of the pin holes 11.

[0019] Specifically, when assembling the spherical shell of the drone, several positioning pins 21 at the bottom of the upper ring plate 2 are precisely fitted into the inner wall of several pin holes 11 at the top of the lower ring plate 1, thereby quickly determining the relative position of the lower ring plate 1 and the upper ring plate 2, avoiding subsequent misalignment during assembly, and laying the foundation for the overall fixation of the shell. Next, rotate the base 51. The base 51 drives the threaded rod 52 and the connecting column 55 to rotate synchronously, so that the connecting column 55 gradually embeds into the slide groove 23. When the connecting column 55 is fully embedded in the slide groove 23, the fixing cylinder 53 is rotated through the anti-slip sleeve 54. The anti-slip sleeve 54 can increase the friction of the hand and prevent slipping during rotation. When the fixing cylinder 53 rotates, it will move downward along the axial direction of the threaded rod 52, thereby pulling the connecting column 55 and the clamping plate 56 downward until the clamping plate 56 is fully fitted into the clamping groove 24. At this time, the clamping plate 56 and the clamping groove 24 form a snap-fit ​​structure, realizing the firm fixation of the lower annular plate 1 and the upper annular plate 2. When maintenance of the drone body 3 is required, the fixing cylinder 53 is rotated in the opposite direction by the anti-slip sleeve 54, so that the fixing cylinder 53 moves upward along the threaded rod 52. The fixing cylinder 53 drives the clamping plate 56 to disengage from the clamping groove 24. Then, the base 51 is rotated in the opposite direction to rotate the connecting column 55 out of the sliding groove 23. Finally, the upper annular plate 2 is pulled upward to pull the positioning pin 21 out of the pin hole 11, so that the lower annular plate 1 and the upper annular plate 2 can be separated, exposing the drone body 3 for maintenance operations. This design, through the positioning pin 21 and pin hole 11, can quickly determine the relative position of the lower annular plate 1 and the upper annular plate 2, greatly shortening the preparation time for initial assembly. Through the design of the quick-release mechanism 5, on the one hand, it works with the positioning pin 21 and pin hole 11 to firmly fix the lower annular plate 1 and the upper annular plate 2, protecting the internal UAV body 3. On the other hand, operators can quickly complete maintenance without professional tools, greatly shortening maintenance time and ensuring the continuity of concrete structure corrosion monitoring tasks.

[0020] Reference Figures 1-5 This is the second embodiment of the present invention, which differs from the first embodiment in that the protective component 4 includes a connecting rod 41 and a first spring sensor 42; Several connecting rods 41 are connected by a first spring sensor 42, and the connecting rods 41 and the first spring sensor 42 are combined to form a hemispherical cage structure. Several connecting rods 41 are connected at the ends away from the first spring sensor 42 to the lower annular plate 1 and the upper annular plate 2 respectively; The protective component 4 also includes a second spring sensor 43, and a plurality of second spring sensors 43 are circumferentially distributed on the side wall of the lower annular plate 1; The springs inside the first spring sensor 42 and the second spring sensor 43 are both trapezoidal springs.

[0021] Specifically, the lower annular plate 1, the upper annular plate 2, and the connecting rod 41 are all made of modified plastic with good flexibility to meet the requirements of complex structures and impact resistance. The connecting rod 41 is internally laid with flexible wires, so any two first spring sensors 41 can form an electrical circuit when they simultaneously contact the concrete surface, and the detection system can realize the reading and analysis of corrosion degree data. The springs inside the first spring sensor 42 and the second spring sensor 43 are trapezoidal springs, which can be easily installed and have better buffering performance. When the drone collides, the first part to come into contact with the hemispherical cage structure composed of the connecting rod 41 and the first spring sensor 42 is reduced, thereby reducing the impact force transmitted to the drone body 3, forming all-round collision protection and improving the safety of operation in complex environments. This design, through the hemispherical cage structure composed of the connecting rod 41 and the first spring sensor 42, can reduce the impact force transmitted to the main body 3 of the UAV, forming all-round collision protection and improving the safety of operation in complex environments. At the same time, the lower annular plate 1, the upper annular plate 2 and the connecting rod 41 are made of modified plastic with good flexibility to meet the requirements of complex structure and impact resistance. The connecting rod 41 is laid with flexible wires, so any two first spring sensors 41 can form an electrical circuit when they simultaneously contact the concrete surface, and the detection system can realize the reading and analysis of corrosion degree data.

[0022] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures, comprising a lower annular plate (1) and an upper annular plate (2), characterized in that: The bottom end of the lower annular plate (1) and the top end of the upper annular plate (2) are provided with protective components (4). The main body of the drone (3) is fixedly installed on the inner wall of the lower annular plate (1). Several lower rotating grooves (12) are opened on the side wall of the lower annular plate (1). Several upper rotating grooves (22) are opened on the side wall of the upper annular plate (2). A sliding groove (23) is opened on the inner wall of the upper rotating groove (22). A slot (24) is opened on the inner wall of the sliding groove (23). The lower annular plate (1) includes a quick-release mechanism (5) for easy maintenance. The lower rotating groove (12) is rotatably connected to a base (51), and a threaded rod (52) is fixedly connected to the top of the base (51). A fixed cylinder (53) is threadedly connected to the surface of the threaded rod (52), and an anti-slip sleeve (54) is fixedly sleeved on the surface of the fixed cylinder (53). A connecting column (55) is rotatably connected to the top of the fixed cylinder (53), and the connecting column (55) is fitted into the inner wall of the sliding groove (23). A clamping plate (56) is fixedly connected to the top of the connecting column (55), and the clamping plate (56) is fitted into the inner wall of the clamping groove (24).

2. A spherical UAV for quantitative monitoring of corrosion in concrete structures according to claim 1, characterized in that: The lower annular plate (1) has several pin holes (11) at its top end, and the upper annular plate (2) has several positioning pins (21) fixedly connected to its bottom end. The positioning pins (21) are fitted into the inner wall of the pin holes (11).

3. A spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures according to claim 1, characterized in that: The protective component (4) includes a connecting rod (41) and a first spring sensor (42).

4. A spherical UAV for quantitative monitoring of corrosion in concrete structures according to claim 3, characterized in that: Several of the connecting rods (41) are connected by a first spring sensor (42), and the connecting rods (41) and the first spring sensor (42) are combined to form a hemispherical cage structure.

5. A spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures according to claim 3, characterized in that: The ends of several connecting rods (41) away from the first spring sensor (42) are respectively connected to the lower annular plate (1) and the upper annular plate (2).

6. A spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures according to claim 1, characterized in that: The protective assembly (4) also includes a second spring sensor (43), and a plurality of the second spring sensors (43) are circumferentially distributed on the side wall of the lower annular plate (1).

7. A spherical unmanned aerial vehicle (UAV) for quantitative monitoring of corrosion in concrete structures according to claim 1, characterized in that: The springs inside the first spring sensor (42) and the second spring sensor (43) are both trapezoidal springs.

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