A folding laser ranging target device for unmanned aerial vehicle bridge detection

Abstract

The utility model discloses a kind of unmanned vehicle bridge detection folding laser ranging target device, it is related to detection device technical field, including the mounting plate of " " shape, it has mutually perpendicular and integrally formed vertical portion and horizontal portion, the horizontal portion constitutes the reference plane of device placement;Laser range finder, it is perpendicular to horizontal portion and hinged in vertical portion, when working, rotate to horizontal limit along hinged point and lean on vertical portion.The utility model realizes the quick operation of full-process folding by hinged folding structure, under unfolded state, the composite support plane parallel to ground formed by two support frames, increase the contact area and support point of device and ground, improve the reliability of measurement result, when closed, the closed protective buffer space formed by two support frames and horizontal portion together enclose, reduce the risk of laser range finder and other components collision, prolong the service life of laser range finder, reduce detection cost.

Description

Technical Field

[0001] The present utility model relates to the technical field of detection devices, in particular to a foldable laser ranging target device for UAV bridge detection. Background Art

[0002] In the field of bridge detection, laser ranging technology is widely used due to its characteristics such as high measurement accuracy and fast response speed. Its core lies in the accurate acquisition of key parameters of bridge structures through a laser ranging device.

[0003] As a precision optical instrument, the core components of a laser rangefinder are extremely sensitive to external force disturbances such as collision and vibration. In the non-working state of existing devices, there is a lack of special closed protection structures, and laser rangefinders are mostly exposed or only stored in simple cloth bags or boxes. During transportation, especially when carried by an unmanned aerial vehicle, the device is prone to lens wear and internal component loosening of the laser rangefinder due to bumping and collision, which not only affects the measurement accuracy, but also requires frequent maintenance or replacement, significantly increasing the equipment maintenance cost for bridge detection. Content of the Utility Model

[0004] Aiming at the shortcomings existing in the prior art, the present utility model provides a foldable laser ranging target device for UAV bridge detection.

[0005] In order to achieve the above objective, the technical solution of the present utility model is as follows:

[0006] A foldable laser ranging target device for UAV bridge detection, comprising:

[0007] An inverted "T"-shaped mounting plate, which has a vertical portion and a lateral portion that are perpendicular to each other and integrally formed, and the lateral portion constitutes a reference plane for placing the device;

[0008] A laser rangefinder, which is perpendicular to the lateral portion and hinged to the vertical portion. In operation, the laser rangefinder rotates along the hinge point to a lateral position where it abuts against the vertical portion, so that the measurement axis of the laser rangefinder extends perpendicular to the reference plane of the lateral portion;

[0009] Two support frames symmetrically hinged to both side edges of the lateral portion, and configured as:

[0010] In an unfolded state, when the two support frames rotate away from each other along the hinge point until the bottom surfaces of the two support frames are coplanar, a composite support plane parallel to the ground is formed;

[0011] In a closed state, when the two support frames rotate relatively along the hinge point to be folded and cover the outer side of the laser rangefinder, the two support frames and the lateral portion together enclose a closed protective buffer space for the laser rangefinder.

[0012] Preferably, the inner wall of the support frame is provided with a rubber beam that protrudes and extends along its length. When the support frame is retracted to form a protective buffer chamber, the rubber beam contacts the outer surface of the laser rangefinder.

[0013] Preferably, when the support frame is closed, a buffer gap is left between its inner wall surface and the outer surface of the laser rangefinder, and the buffer gap is adapted to the length of the rubber beam.

[0014] Preferably, the cross-section of the support frame is arched, and when the support frame is in a closed state, they together form an elliptical closed protective buffer space.

[0015] Preferably, the adjacent edges of the support frame are provided with interlocking snap-fit ​​structures to form a mechanical self-locking mechanism when the two support frames are in the closed position.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model achieves rapid operation of the entire process of unfolding, measuring, and retracting through a hinged folding structure. In the unfolded state, the composite support plane formed by the two support frames parallel to the ground increases the contact area and support points between the device and the ground, improving the reliability of the measurement results. In the closed state, the enclosed protective buffer space formed by the two support frames and the transverse part reduces the risk of collision between the laser rangefinder and other components, extends the service life of the laser rangefinder, and reduces the detection cost.

[0018] 2. This utility model, through the adaptive design of the rubber beam and the buffer gap, not only avoids scratches caused by hard contact between the support frame and the surface of the rangefinder when the frame is retracted, but also reserves space for thermal expansion and contraction of components caused by temperature changes, further improving the protective effect of the laser rangefinder. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the unfolded structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the closed-state structure of this utility model.

[0023] The diagram shows the following labels: 1. Mounting plate; 11. Vertical section; 12. Horizontal section; 2. Laser rangefinder; 3. Support frame; 31. Rubber beam. Detailed Implementation

[0024] It is easy to understand that, based on the technical solution of the present utility model, those skilled in the art can propose various interchangeable structural modes and implementation modes without changing the essential spirit of the present utility model. Therefore, the following specific embodiments and accompanying drawings are merely exemplary illustrations of the technical solution of the present utility model, and should not be regarded as the entirety of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0025] Example

[0026] As Figures 1-3 shown, a foldable laser ranging target device for unmanned aerial vehicle bridge detection comprises:

[0027] An inverted T-shaped mounting plate 1, which has a vertically perpendicular and integrally formed vertical portion 11 and a transverse portion 12, wherein the transverse portion 12 forms a reference plane for placing the device;

[0028] A laser rangefinder 2, which is perpendicular to the transverse portion 12 and hinged to the vertical portion 11, rotates around the hinge point to the transverse position and abuts against the vertical portion 11 during operation, so that the measurement axis of the laser rangefinder 2 extends perpendicular to the reference plane of the transverse portion 12;

[0029] Two support frames 3 symmetrically hinged to two side edges of the transverse portion 12, and configured as:

[0030] In an unfolded state, when the two support frames 3 rotate away from each other around the hinge points until the bottom surfaces of the two support frames 3 are coplanar, a composite support plane parallel to the ground is formed;

[0031] In a closed state, when the support frames 3 rotate relatively around the hinge points to be folded and cover the outside of the laser rangefinder 2, the two support frames 3 and the transverse portion 12 together enclose a closed protective buffer space for the laser rangefinder 2.

[0032] When the device is required for bridge detection, the device is firstly removed from the unmanned aerial vehicle and placed at a suitable position. The two support frames 3 are rotated away from each other along the hinge points from the closed state to the unfolded state, so that the bottom surfaces of the two support frames 3 are coplanar to form a composite support plane parallel to the ground, and the device is stably placed. Then the laser rangefinder 2 is rotated along the hinge point to the transverse position and abuts against the vertical portion 11, so that the measurement axis of the laser rangefinder 2 extends perpendicular to the reference plane of the transverse portion 12 and is aligned with the part to be measured of the bridge. The laser rangefinder 2 emits a laser beam, the laser beam irradiates the target position of the bridge and then reflects back, the laser rangefinder 2 receives the reflected light, and calculates the distance between the device and the target position of the bridge based on the time difference between the emitted light and the received light in combination with the speed of light, thereby completing the ranging work.

[0033] The measuring axis of the laser rangefinder 2 can extend accurately perpendicularly to the reference plane and be aligned with the target, ensuring that the laser beam accurately illuminates the target, reducing measurement inaccuracies caused by angular deviations, greatly improving measurement accuracy, and meeting the requirements of bridge inspection for high-precision measurement.

[0034] like Figure 2 As shown, in the unfolded state, the composite support plane formed by the two support frames 3 parallel to the ground increases the contact area and support points between the device and the ground, enabling the device to remain stable under various ground conditions. This effectively prevents the device from tipping over or shifting during the measurement process, ensuring that the laser rangefinder 2 can continuously and stably perform measurement work and improving the reliability of the measurement results.

[0035] like Figure 3 As shown, in the closed state, the enclosed protective buffer space formed by the two support frames 3 and the transverse part 12 acts like a protective suit for the laser rangefinder 2. During device transportation or in complex testing environments, when the device may be impacted by external objects, this protective buffer space can absorb and disperse the impact force, effectively protecting the laser rangefinder 2 from damage. Even during drone flight, if unexpected turbulence causes the device to shake, the protective buffer space can reduce the risk of the laser rangefinder 2 colliding with other components, extending the service life of the laser rangefinder 2 and reducing testing costs.

[0036] When not in use, the support frame 3 can be folded up to cover the outside of the laser rangefinder 2, reducing the overall size of the device and making it easy to carry on a drone for transport. Meanwhile, the components are connected by hinges, simplifying operation. Whether unfolding the device for measurement or folding it up for storage, the process can be completed quickly, improving the efficiency of the inspection work and enabling inspectors to operate more conveniently at different bridge inspection points.

[0037] The inner wall of the support frame 3 is provided with a rubber beam 31 that protrudes and extends along its length. When the support frame 3 is retracted to form a protective buffer chamber, the rubber beam 31 contacts the outer surface of the laser rangefinder 2.

[0038] When the support frame 3 retracts to form a protective buffer chamber, the rubber beam 31 contacts the outer surface of the laser rangefinder 2. The rubber beam 31 has good elasticity, providing further cushioning within the protective buffer space. When an external impact force acts on the device, the rubber beam 31 can undergo elastic deformation, absorbing part of the impact force and preventing it from directly acting on the laser rangefinder 2. This better protects the outer surface of the laser rangefinder 2 from scratches or damage, ensuring that the optical components and electronic components of the laser rangefinder 2 are unaffected and maintaining its normal measurement performance.

[0039] When the support frame 3 is closed, there is a buffer gap between its inner wall and the outer surface of the laser rangefinder 2, and the buffer gap is adapted to the length of the rubber beam 31.

[0040] When the support frame 3 is closed, a buffer gap exists between its inner wall and the outer surface of the laser rangefinder 2, and this buffer gap is adapted to the length of the rubber beam 31. This buffer gap provides space for the rubber beam 31 to elastically deform when subjected to impact. When impact occurs, the rubber beam 31 can undergo a certain degree of compression and deformation within the buffer gap, further enhancing the buffering effect and improving the protection of the laser rangefinder 2. Simultaneously, the buffer gap also prevents damage to the laser rangefinder 2 that might occur during normal placement or transportation due to excessive compression between the support frame 3 and the laser rangefinder 2.

[0041] The cross-section of the support frame 3 is arched. When the support frame 3 is in a closed state, it together forms an elliptical closed protective buffer space.

[0042] The support frame 3 has an arched cross-section, forming an elliptical enclosed protective buffer space when closed. The arched structure possesses excellent mechanical properties, capable of withstanding significant external forces. When the device is subjected to an external impact, the arched support frame 3 can evenly distribute the impact force across the entire structure, reducing excessive localized stress and improving the strength and stability of the protective structure. Furthermore, the elliptical enclosed protective buffer space, compared to other shapes, better conforms to the shape of the laser rangefinder 2, providing more comprehensive and tighter protection within a limited space. This effectively reduces the swaying of the laser rangefinder 2 within the protective space, further protecting it.

[0043] The adjacent edges of the support frame 3 are provided with interlocking snap-fit ​​structures, forming a mechanical self-locking mechanism when the two support frames 3 are in the closed position.

[0044] The adjacent edges of the support frame 3 are equipped with interlocking snap-fit ​​structures, forming a mechanical self-locking mechanism when the two support frames 3 are in the closed position. When the support frame 3 is retracted to the closed position, the snap-fit ​​structure automatically locks, ensuring that the two support frames 3 are tightly connected and will not be accidentally opened during transportation or unauthorized operation. This mechanical self-locking function improves the safety of the device during storage and transportation, avoids the risk of exposure and damage to the laser rangefinder 2 that may result from the accidental opening of the support frame 3, and also reduces the additional fixing steps required by the testing personnel during operation, improving the convenience of operation.

[0045] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A foldable laser ranging target device for bridge inspection by unmanned aerial vehicles (UAVs), characterized in that, Comprising: an inverted "T"-shaped mounting plate, which has a vertical portion and a transverse portion that are perpendicular to each other and integrally formed, wherein the transverse portion constitutes a reference plane for placing the device; a laser range finder, which is perpendicular to the transverse portion and is hinged to the vertical portion, and rotates along the hinge point to a transverse limit position and abuts against the vertical portion during operation, so that a measurement axis of the laser range finder extends perpendicularly to the reference plane of the transverse portion; two support frames symmetrically hinged to both side edges of the transverse portion, and configured to: in an unfolded state, when the two support frames rotate away from each other along the hinge point until bottom surfaces of the two support frames are coplanar, a composite support plane parallel to the ground is formed; in a closed state, when the two support frames rotate toward each other along the hinge point, are folded and cover the outer side of the laser range finder, the two support frames and the transverse portion together enclose a closed protective buffer space for the laser range finder.

2. The foldable laser ranging target device for UAV bridge inspection according to claim 1, characterized in that: An inner wall surface of the support frame is provided with a rubber beam protruding and extending along a length direction thereof, and when the support frames are folded to form the protective buffer chamber, the rubber beam contacts an outer surface of the laser range finder.

3. The foldable laser ranging target device for UAV bridge inspection according to claim 2, characterized in that: When the support frames are in the closed state, a buffer gap is reserved between the inner wall surfaces of the support frames and the outer surface of the laser range finder, and the buffer gap is adapted to the length of the rubber beam.

4. The foldable laser ranging target device for UAV bridge inspection according to claim 3, characterized in that: The cross section of each support frame is arched, and when the support frames are in the closed state, the two support frames together form an elliptical closed protective buffer space.

5. A foldable laser ranging target device for UAV bridge inspection according to claim 1, characterized in that: Adjacent edges of the support frames are provided with mutually matched clamping structures, which form mechanical self-locking of the two support frames when the two support frames are in the closed position.

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