Road and bridge crack inspection unmanned aerial vehicle

By equipping drones with air pumps, liquid tanks, and nozzle systems to clean dust from bridge cracks and marking them with fluorescent dyes, the problems of incomplete bridge crack detection and repeated shooting were solved, achieving efficient and accurate crack monitoring and marking.

CN223919607UActive Publication Date: 2026-02-17JIANGXI TOHUI SCI & TECH SHARES CO LTD
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Patent Information

Application Number
CN202520719206.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-16
Publication Date
2026-02-17
Estimated Expiration
2035-04-16

AI Technical Summary

Technical Problem

When existing road and bridge crack inspection drones are used, bridge cracks are easily contaminated by dust and other pollutants, resulting in incomplete images and affecting the accuracy of the inspection results. Furthermore, the same crack is prone to being photographed repeatedly or missed.

Method used

A road and bridge crack inspection drone was designed, equipped with an air pump, liquid tank, main air pipe, branch air pipe and nozzle. It uses a powerful airflow to clean dust and debris from the cracks and uses fluorescent dye to mark the cracks, ensuring a clear field of vision and accurate monitoring results.

Benefits of technology

It effectively removes dust and debris from cracks, provides a clear view and spraying conditions, ensures the accuracy of monitoring data and the long-term effectiveness of marking, facilitates the differentiation between unmonitored and newly generated cracks, and improves detection efficiency and accuracy.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a road and bridge crack inspection unmanned aerial vehicle, and relates to the technical field of road and bridge technical inspection. The crack cleaning device comprises the main body and the functional mechanism, the functional mechanism comprises the fixing box, the main air pipe, the branch air pipes and the air pump are arranged, air is rapidly conveyed to the first spray head through the main air pipe, strong airflow is sprayed out to clean cracks, it is ensured that dust, chippings and other sundries in the cracks can be effectively removed, and the crack cleaning effect is improved. Clear view and spraying conditions are provided for follow-up monitoring and marking work, the branch air pipe is connected with the second spray head, blown-off pollutants such as dust can be effectively prevented from polluting the monitor, the accuracy of monitoring data is ensured, fluorescent dye is conveyed to the third spray head along the pigment pipe, the dye is sprayed out to conduct spraying and dyeing on cracks, and the quality of the cracks is improved. The crack is easier to distinguish, the crack condition is convenient to monitor, the durability of the fluorescent dye also ensures the long-term effectiveness of the mark, and the subsequent long-term monitoring and maintenance work are convenient.
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Description

Technical Field

[0001] This utility model relates to the field of road and bridge technical inspection technology, specifically to a road and bridge crack inspection drone. Background Technology

[0002] Road and bridge crack inspection drones are intelligent devices that integrate high-definition cameras, sensors, image processing, and other technologies. They use drone technology to scan the surface of roads and bridges from the air, automatically detecting and recording information such as the location, length, and width of cracks. This drone inspection method has significant advantages such as efficient inspection, accurate identification, and safe operation. It can cover a large area of ​​highways and bridges in a short time, improve inspection efficiency, reduce labor costs, and ensure the safety of inspection personnel.

[0003] Currently, when existing road and bridge crack inspection drones are used to inspect bridge cracks, the cracks are easily contaminated by dust and other pollutants, resulting in incomplete images of the cracks and affecting the accuracy of the inspection results. Furthermore, during inspections, there are many similar bridge cracks, which can easily mislead and affect drone operators, leading to repeated images of the same crack or missed images of cracks. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a road and bridge crack inspection drone to solve the technical problems of incomplete crack imaging, affected accuracy of inspection results, repeated imaging of the same crack, or missed imaging of cracks.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a road and bridge crack inspection drone, comprising a main body and a functional mechanism, wherein the functional mechanism includes a fixed box, the inside of which is provided with an installation groove, an air pump and a liquid storage tank are provided in the installation groove, a main air pipe is provided on the top of the air pump, a first nozzle is fixedly connected to one end of the main air pipe, a branch air pipe is provided on one side of the main air pipe, and a second nozzle is fixedly connected to one end of the branch air pipe;

[0006] The top of the liquid storage tank is equipped with a pigment tube, and a third nozzle is fixedly connected to one end of the pigment tube.

[0007] By adopting the above technical solution, the gas is quickly delivered to the first nozzle through the main gas pipe and sprays out a powerful airflow to clean the crack, ensuring that dust, debris and other impurities in the crack can be effectively removed, providing a clear view and spraying conditions for subsequent monitoring and marking work.

[0008] Furthermore, two fixing frames are symmetrically arranged at the bottom of the main body, and the top of the fixing frames is welded to the fixing box.

[0009] By adopting the technical scheme, the top of the fixing frame is welded with the fixing box, the connecting mode ensures the firm connection between the fixing box and the main body, can bear various external forces and vibrations in the flight and operation process of the unmanned aerial vehicle, and guarantees the reliability and stability of the functional components.

[0010] Further, the main body is provided with a propeller around, and the top of the main body is fixedly connected with a mounting plate.

[0011] By adopting the technical scheme, the propeller ensures the stability and controllability of flight, makes the unmanned aerial vehicle keep balance in the air, improves the flight efficiency and wind resistance of the unmanned aerial vehicle, and makes the unmanned aerial vehicle keep stable flight attitude under strong wind conditions.

[0012] Further, the top of the mounting plate is provided with a base, and the base is provided with a fixing plate for fixing a main air pipe, a branch air pipe and a pigment pipe on both sides.

[0013] By adopting the technical scheme, the fixing plate makes the pipeline arranged and fixed in order, avoids loosening or damage due to vibration or external force in the flight process of the unmanned aerial vehicle, and guarantees the stability and reliability of the unmanned aerial vehicle operation.

[0014] Further, the outer surface of the base is fixedly connected with a fixing ring, and the inside of the fixing ring is provided with a monitoring instrument.

[0015] By adopting the technical scheme, the firm structure of the fixing ring can effectively protect the monitoring instrument from the impact and vibration of the outside in the flight and operation process of the unmanned aerial vehicle, and guarantees the reliability and stability of the monitoring instrument.

[0016] Further, the second spray head is provided with four, and the four second spray heads are uniformly arranged along the inner wall of the fixing ring.

[0017] By adopting the technical scheme, the four second spray heads are uniformly arranged along the inner wall of the fixing ring, which ensures that the gas can uniformly cover the surrounding space of the monitoring instrument when sprayed, effectively prevents the pollution of the monitoring instrument caused by the dust, debris and other pollutants blown off during crack cleaning, and guarantees the cleanliness of the monitoring instrument and the accuracy of the monitoring data.

[0018] In summary, the utility model mainly has the following beneficial effects:

[0019] 1、The utility model discloses a main gas pipe, branch gas pipe and air pump are set up, and gas is transported to first spray head through main gas pipe rapidly, and the powerful gas stream is sprayed to clean the crack, ensures that the dust, chippings and other sundries in the crack can be effectively removed, provides clear vision and spraying condition for subsequent monitoring and marking work, branch gas pipe is connected with second spray head, when first spray head cleans the crack, the gas that second spray head sprays can effectively prevent the pollution of blown-off dust and other pollutants to monitor appearance, guarantees the cleanliness of monitor appearance, ensures the accuracy of monitoring data.

[0020] 2、The utility model discloses set up liquid storage tank and pigment pipe, pigment pipe is connected with third spray head, when liquid pump starts, fluorescent dye is transported to third spray head along pigment pipe, and dye is sprayed to crack and is sprayed, and the mark of fluorescent dye makes the crack more easily distinguish, and it is convenient for subsequent distinguishing the crack that has not monitored, the crack that generates newly and the change of crack etc., and the durability of fluorescent dye also ensures the long -term effectiveness of marking, and it is convenient for subsequent long -term monitoring and maintenance work. DRAWINGS

[0021] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;

[0022] Figure 2 It is the structure schematic diagram of main gas pipe of the utility model;

[0023] Figure 3 It is the structure schematic diagram of pigment pipe of the utility model;

[0024] Figure 4 It is the overhead structure schematic diagram of the utility model.

[0025] In the drawing: 1, main body;2, mounting plate;3, base;4, monitor appearance;5, propeller;6, fixed frame;7, function mechanism;701, fixed box;702, installation slot;703, main gas pipe;704, first spray head;705, branch gas pipe;706, liquid storage tank;707, second spray head;708, pigment pipe;709, third spray head;710, air pump;8, fixed plate;9, fixed ring. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0027] A road and bridge crack inspection unmanned plane, like Figures 1-4As shown, it includes a main body 1 and a functional mechanism 7. The functional mechanism 7 includes a fixed box 701. The fixed box 701 has an installation groove 702 inside. An air pump 710 and a liquid storage tank 706 are installed in the installation groove 702. A main air pipe 703 is installed on the top of the air pump 710. A first nozzle 704 is fixedly connected to one end of the main air pipe 703. A branch air pipe 705 is installed on one side of the main air pipe 703. A second nozzle 707 is fixedly connected to one end of the branch air pipe 705.

[0028] A pigment tube 708 is installed on the top of the liquid storage tank 706. One end of the pigment tube 708 is fixedly connected to a third nozzle 709. Gas is quickly delivered to the first nozzle 704 through the main gas pipe 703 and a powerful airflow is sprayed to clean the cracks, ensuring that dust, debris and other impurities in the cracks can be effectively removed, providing a clear view and spraying conditions for subsequent monitoring and marking work. The pigment tube 708 is connected to the third nozzle 709. When the liquid pump is started, fluorescent dye is delivered to the third nozzle 709 along the pigment tube 708 and sprayed to color the cracks. The marking of the fluorescent dye makes the cracks easier to distinguish.

[0029] See Figure 1 , Figure 2 Two fixed frames 6 are symmetrically arranged at the bottom of the main body 1. The top of the fixed frame 6 is welded to the fixed box 701. This connection method ensures a firm connection between the fixed box 701 and the main body 1, which can withstand various external forces and vibrations during the flight and operation of the UAV, and ensures the reliability and stability of the functional components. The symmetrical arrangement of the fixed frame 6 and the fixed box 701 helps to optimize the center of gravity distribution of the UAV, making the UAV more stable and easier to control during flight, and improving the safety and accuracy of flight.

[0030] See Figure 1 The main body 1 is equipped with propellers 5 around its perimeter, and a mounting plate 2 is fixedly connected to the top of the main body 1. The propellers 5 ensure flight stability and controllability, enabling the drone to maintain balance in the air, improving the drone's flight efficiency and wind resistance, and allowing it to maintain a stable flight attitude even in strong wind conditions. The fixed connection between the mounting plate 2 and the main body 1 ensures the robustness and stability of the entire drone structure, enabling the drone to withstand various external forces and vibrations during flight and operation.

[0031] See Figure 1 , Figure 3 , Figure 4The mounting plate 2 has a base 3 on its top. The base 3 has fixing plates 8 on both sides for fixing the main air pipe 703, branch air pipe 705 and pigment pipe 708. The fixing plates 8 allow the pipes to be arranged and fixed in an orderly manner, avoiding loosening or damage due to vibration or external force during the flight of the UAV, and ensuring the stability and reliability of the UAV operation. As the main supporting component of the upper structure of the UAV, the mounting plate 2 has a base 3 on its top that provides a stable mounting foundation for the monitoring instrument 4 and other functional components.

[0032] See Figure 1 , Figure 4 A fixing ring 9 is fixedly connected to the outer surface of the base 3. A monitoring device 4 is installed inside the fixing ring 9. The robust structure of the fixing ring 9 can effectively protect the monitoring device 4 from external impacts and vibrations during the flight and operation of the drone, ensuring the reliability and stability of the monitoring device 4.

[0033] See Figure 4 Four second nozzles 707 are provided, and the four second nozzles 707 are evenly and equidistantly arranged in a circular array along the inner wall of the fixing ring 9. This ensures that the gas can evenly cover the space around the monitor 4 when it is sprayed out, effectively preventing dust, debris and other pollutants blown off during crack cleaning from contaminating the monitor 4, ensuring the cleanliness of the monitor 4 and the accuracy of the monitoring data. The simultaneous operation of multiple second nozzles 707 increases the amount of gas sprayed and the coverage area, improving the efficiency of crack cleaning. The evenly distributed second nozzles 707 can ensure that the dust and debris around the crack are quickly blown away, providing a clear view for subsequent crack marking and monitoring.

[0034] The implementation principle of this utility model is as follows: First, after the operator controls the drone to fly to the designated position, the first nozzle 704 is aligned with the gap. Then, the air pump 710 is started to deliver gas through the main air pipe 703 to the first nozzle 704 for spraying out to clean the gap. At the same time, the gas is delivered through the branch air pipe 705 to the second nozzle 707 for spraying out to prevent dust and other pollutants blown off from contaminating the monitoring instrument 4. Then, the air pump 710 is stopped, the drone position is adjusted so that the third nozzle 709 is aligned with the gap, and the liquid pump inside the liquid tank 706 delivers fluorescent dye along the pigment pipe 708 to the third nozzle 709 for spraying out to coat and dye the gap and mark the gap. This makes it easier to distinguish information such as unmonitored gaps, newly generated gaps, and changes in subsequent gaps, and at the same time makes the inside of the gap easy to observe. Then, the monitoring instrument 4 monitors the gap.

[0035] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A road and bridge crack inspection drone, characterized in that: It includes a main body (1) and a functional mechanism (7). The functional mechanism (7) includes a fixed box (701). The fixed box (701) has an installation slot (702) inside. An air pump (710) and a liquid storage tank (706) are installed in the installation slot (702). A main air pipe (703) is installed on the top of the air pump (710). A first nozzle (704) is fixedly connected to one end of the main air pipe (703). A branch air pipe (705) is installed on one side of the main air pipe (703). A second nozzle (707) is fixedly connected to one end of the branch air pipe (705). The top of the liquid storage tank (706) is provided with a pigment tube (708), and a third nozzle (709) is fixedly connected to one end of the pigment tube (708).

2. The road and bridge crack inspection drone according to claim 1, characterized in that: Two fixing frames (6) are symmetrically arranged at the bottom of the main body (1), and the top of the fixing frame (6) is welded to the fixing box (701).

3. The road and bridge crack inspection drone according to claim 1, characterized in that: The main body (1) is provided with propellers (5) around its perimeter, and a mounting plate (2) is fixedly connected to the top of the main body (1).

4. The road and bridge crack inspection drone according to claim 3, characterized in that: The mounting plate (2) is provided with a base (3) on its top, and fixing plates (8) for fixing the main air pipe (703), branch air pipe (705) and pigment pipe (708) are provided on both sides of the base (3).

5. The road and bridge crack inspection drone according to claim 4, characterized in that: A fixing ring (9) is fixedly connected to the outer surface of the base (3), and a monitoring instrument (4) is installed inside the fixing ring (9).

6. The road and bridge crack inspection drone according to claim 1, characterized in that: There are four second nozzles (707), and the four second nozzles (707) are evenly spaced in a circular array along the inner wall of the fixing ring (9).