A rotor unmanned aerial vehicle assisted landing positioning device

Abstract

This invention proposes an auxiliary landing positioning device for rotary-wing unmanned aerial vehicles (UAVs), relating to the field of UAV-assisted landing technology. It includes a positioning bracket, a fixing component, a positioning hole, an observation stake, and a positioning column. The positioning bracket has symmetrically arranged mounting parts connecting the fixing component on its outer edge of an annular frame, and a cylindrical positioning hole at the center of the frame. The positioning column is vertically fixed to the bearing surface of the observation stake, with the axis of the positioning column perpendicular to the bearing plane of the observation stake. The inner wall of the positioning hole and the outer wall of the positioning column form a clearance fit structure. During landing, the positioning bracket descends with the landing gear, and the positioning hole engages with the positioning column to form a physical constraint, eliminating horizontal displacement. This device transforms the observation stake positioning reference into a rigid, vertical positioning column. Even if the observation stake settles or tilts, the UAV can still accurately land at a relatively fixed position on the positioning column through mechanical engagement, solving the landing deviation problem caused by pile deformation in traditional visual positioning.

Description

Technical Field

[0001] This utility model relates to the field of rotary-wing unmanned aerial vehicle (UAV) assisted landing technology, and in particular to a rotary-wing UAV assisted landing positioning device. Background Technology

[0002] Currently, rotary-wing drones, with their high maneuverability and autonomous control capabilities, are widely used in various monitoring scenarios. However, significant challenges remain when performing specific tasks requiring precise landings, such as landing the drone at a fixed location on a pre-set observation post. Existing technologies typically rely on the drone's own vision or GPS positioning system for landing guidance. But this approach faces a critical problem: when the pre-set observation post shifts in position or changes in surface morphology due to environmental factors (such as foundation settlement, external impact, or material deformation), the drone cannot accurately detect these changes, causing its final landing position to deviate from the expected target point of the observation post. This landing deviation can not only affect subsequent operational processes (such as automatic charging and data download) but may also pose safety risks in complex or hazardous environments.

[0003] Therefore, there is an urgent need for an auxiliary positioning device that can overcome the influence of changes in the state of the observation post and ensure that the rotary-wing UAV can land accurately at a relatively fixed position on the observation post every time. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model proposes an auxiliary landing positioning device for rotary-wing unmanned aerial vehicles, comprising a positioning bracket, a fixing component, a positioning hole, an observation stake, and a positioning post; The positioning bracket is a ring-shaped metal frame. Four mounting parts are symmetrically arranged on the outer edge of the positioning bracket. Each mounting part is fixedly connected to a fastener. A cylindrical positioning hole is provided through the central area of ​​the frame. The fastener includes an arc-shaped clamping surface that matches the outer contour of the end of the UAV landing gear. The two ends of the clamping surface are connected by a locking mechanism, so that the fastener covers and fixes itself to the circumferential surface of the end of the landing gear. A positioning column is vertically fixed at the center of the bearing surface of the observation pile, and the axis of the positioning column is perpendicular to the bearing plane of the observation pile; A clearance fit structure is formed between the inner wall of the positioning hole and the outer wall of the positioning post.

[0005] In some implementations, the inner side of the arc-shaped clamping surface of the fastener is provided with anti-slip texture, and the locking mechanism includes a threaded rod that passes through both ends of the clamping surface. One end of the threaded rod is hinged to the left end of the clamping surface, and the other end passes through the right end of the clamping surface and is screwed onto a wing nut.

[0006] In some implementations, the bottom of the positioning column is provided with an annular mounting flange, which is connected to the center of the bearing surface of the observation pile by circumferentially distributed fasteners, and the axis of the positioning column coincides with the normal of the bearing plane of the observation pile.

[0007] In some implementations, the inner edge of the annular frame of the positioning bracket forms a conical guide surface, with the small end of the guide surface facing the observation pile and the large end of the guide surface smoothly connected to the inner wall of the positioning hole.

[0008] In some implementations, the anti-slip texture consists of staggered wedge-shaped protrusions with the tips of the wedges pointing towards the direction of the drone's descent. A compression spring is fitted into the middle of the threaded rod, with the two ends of the spring abutting the right end of the clamping surface and the wing nut, respectively.

[0009] In some implementations, the top of the positioning post is a tapered guide head, the maximum diameter of which is equal to the outer diameter of the positioning post, and the side of the guide head forms a constant acute angle with the axis of the positioning post.

[0010] In some implementations, the large end edge of the conical guide surface is flush with the upper surface of the positioning bracket, and the small end edge extends towards the observation pile to form a trumpet-shaped structure, with the cone angle of the guide surface being 30° to 60°.

[0011] In some implementations, four circumferentially distributed air guide grooves are opened on the side of the tapered guide head. The air guide grooves extend from the top of the guide head to the surface of the positioning column, and the groove depth decreases uniformly along the height direction.

[0012] In some implementations, a metal base is embedded in the bearing surface of the observation pile, and a threaded connection hole is provided in the center of the base. The bottom of the positioning column is machined with a matching external thread section, and the positioning column is vertically fixed to the center of the base through a threaded connection.

[0013] Compared with existing technologies, the beneficial effects of this utility model are: it effectively solves the problem of inaccurate drone landing positions caused by the settlement or deformation of observation piles; specifically: 1. Secure Installation of Positioning Bracket and Fixture: The positioning bracket, as the core carrier, connects to the fixation component via four symmetrically arranged mounting parts on its outer edge. The key function of the fixation component is that its arc-shaped clamping surface can tightly cover and lock onto the circumferential surface of the UAV landing gear end. This design ensures that the positioning bracket can be securely and repeatedly and accurately installed at the same designated position (end) of the UAV landing gear. This is a prerequisite for subsequent precise positioning, as it guarantees that the spatial position of the positioning reference point (positioning hole) below the UAV remains constant relative to the UAV body and landing gear each time the UAV lands.

[0014] 2. Physical Guidance and Constraint of the Positioning Hole and Positioning Column: The cylindrical positioning hole in the central area of ​​the positioning bracket and the positioning column, vertically fixed to the center of the bearing surface of the observation pile, constitute a direct mechanical guidance and positioning mechanism. Both are designed with a clearance fit. In the final stage of the descent, after the UAV control system (in conjunction with visual assistance) roughly aligns the positioning bracket above the observation pile, the positioning column physically guides the positioning hole to fit into it. The clearance fit provides the necessary tolerance space to accommodate minor control errors, while simultaneously creating a tight physical constraint after fitting.

[0015] 3. Synergistic effect enables precise positioning: Eliminating the influence of changes in the condition of the monitoring piles: This is the core effect of this solution. The positioning benchmark is no longer the entire monitoring pile or a specific marker point on its surface that may settle or deform, but rather a positioning column rigidly and vertically fixed at the center point of its bearing surface. Even if the monitoring pile itself tilts or settles, as long as the positioning column remains vertically installed (its axis is perpendicular to the bearing plane of the monitoring pile), its positional relationship relative to the pre-set functional point of the monitoring pile is determined and remains unchanged during installation. The drone's position relative to the positioning column is uniquely determined by precisely fitting the positioning hole onto the positioning column.

[0016] Achieving a relatively fixed landing position: Because the fixing components ensure that the positioning bracket is precisely installed in the same position at the end of the landing gear every time, and the position of the positioning hole on the positioning bracket is fixed, when the positioning hole fits the positioning post, the spatial position of the UAV's landing gear end relative to the positioning post is consistently high each time it lands successfully. This directly means that the UAV body, relative to the positioning post, and consequently relative to the key positioning point of the observation stake (the positioning post installation point), has achieved the required "relatively fixed position" landing.

[0017] Providing final physical calibration: Sensors such as high-definition cameras are used for initial identification and coarse positioning. The physical mating of the positioning hole and positioning post provides the final mechanical calibration, which does not rely on the continuous accuracy of the sensors. This ensures precise alignment at the moment of contact, greatly improving the reliability and accuracy of landing positioning.

[0018] In summary, by accurately and repeatedly installing the positioning bracket at the end of the landing gear (achieved by fasteners), using the gap fit structure between the positioning hole and the positioning post, and rigidly and vertically fixing the positioning post on the observation pile, a precise positioning mechanism based on physical fitting that does not depend on the overall stability of the observation pile was created. This successfully solved the problem of inaccurate UAV landing position caused by the settlement and deformation of the observation pile, and enabled the UAV to land accurately at a relatively fixed position on the observation pile. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 The diagram shown is a structural schematic of a rotary-wing unmanned aerial vehicle (UAV) assisted landing and positioning device according to an embodiment of the present invention.

[0021] Figure 2 The image shown is a top view of a rotary-wing unmanned aerial vehicle (UAV) assisted landing and positioning device according to an embodiment of this utility model.

[0022] Figure 3 The diagram shown is a schematic diagram of a rotary-wing UAV assisted landing positioning device before landing, according to an embodiment of the present invention.

[0023] Figure 4 The image shown is a schematic diagram of a rotary-wing unmanned aerial vehicle (UAV) assisted landing and positioning device after landing, according to an embodiment of this utility model.

[0024] Attached reference numerals: 1. Positioning bracket; 2. Fixing component; 3. Positioning hole; 4. Observation stake; 5. Positioning column; 6. Landing gear. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] The specific embodiments of this utility model are described below.

[0027] Combination Figures 1 to 4 As shown, this utility model proposes an auxiliary landing positioning device for rotary-wing unmanned aerial vehicles, including a positioning bracket 1, a fixing component 2, a positioning hole 3, an observation stake 4, and a positioning column 5; The positioning bracket 1 is a ring-shaped metal frame. Four mounting parts are symmetrically arranged on the outer edge of the positioning bracket 1. Each mounting part is fixedly connected to the fastener 2. A cylindrical positioning hole 3 is provided through the central area of ​​the frame. The fastener 2 includes an arc-shaped clamping surface that matches the outer contour of the end of the UAV landing gear 6. The two ends of the clamping surface are connected by a locking mechanism, so that the fastener 2 covers and fixes the circumferential surface of the end of the landing gear 6. The center of the bearing surface of the observation pile 4 is vertically fixed with the positioning column 5, and the axis of the positioning column 5 is perpendicular to the bearing plane of the observation pile 4. A clearance fit structure is formed between the inner wall of the positioning hole 3 and the outer wall of the positioning post 5.

[0028] Specifically, the positioning bracket 1 adopts a ring-shaped metal frame structure, with four symmetrically distributed mounting parts on its outer edge fixed to the fixing component 2 by welding. A through cylindrical positioning hole 3 is machined in the central area of ​​the frame, with the hole diameter accuracy meeting the clearance fit requirements. The arc-shaped clamping surface of the fixing component 2 is designed according to the outer contour of the end of the UAV landing gear 6, achieving circumferential coverage and fixation through a locking mechanism. The observation pile 4 uses a concrete base, with the positioning column 5 vertically welded to the center of its bearing surface, ensuring that the axis of the positioning column 5 coincides with the normal line of the bearing plane. When the UAV lands, the positioning bracket 1 descends synchronously with the landing gear 6, and the positioning hole 3 fits onto the outer wall of the positioning column 5 under gravity. The clearance fit structure allows for millimeter-level positional deviation, while physical constraints eliminate horizontal displacement. This structure spatially binds the end of the UAV landing gear 6 to the positioning column 5. Even if the observation pile 4 settles or tilts, the spatial coordinates of the UAV landing point relative to the top of the positioning column 5 remain constant because the positioning column 5 is always perpendicular to the bearing plane. The symmetrical layout of the fixing component 2 ensures balanced force distribution and prevents the support from deflecting due to the impact of landing; the rigidity of the ring frame suppresses positioning errors caused by vibration. The core of this solution is to transform the dynamic landing process into a static mechanical engagement, establishing an absolute coordinate system through the hard contact between the positioning hole 3 and the positioning column 5, replacing the traditional visual positioning method that relies on markings on the pile surface, and fundamentally avoiding the positioning failure problem caused by the deformation of the observation pile 4.

[0029] In some implementations, the inner side of the arc-shaped clamping surface of the fastener 2 is provided with anti-slip texture, and the locking mechanism includes a threaded rod that passes through both ends of the clamping surface. One end of the threaded rod is hinged to the left end of the clamping surface, and the other end passes through the right end of the clamping surface and is screwed onto a wing nut.

[0030] Specifically, the inner side of the arc-shaped clamping surface of the fastener 2 is machined with an anti-slip texture. This texture is formed by precision milling, creating staggered wedge-shaped protrusions with the tips of the wedge-shaped protrusions pointing towards the direction of force on the landing gear 6 during UAV landing. The locking mechanism includes a threaded rod that runs through both sides of the clamping surface. The left end of the threaded rod is hinged to the left end of the clamping surface via a pin, and the right end passes through the right end and is screwed onto a wing nut. When the wing nut is tightened, the threaded rod generates axial tension, causing the clamping surfaces on both sides to close together, and the wedge-shaped protrusions embed into the surface coating of the landing gear 6 to enhance static friction.

[0031] In an alternative solution, the inner side of the clamping surface can be replaced with an embedded rubber pad instead of the mechanical texture. The compression spring, sleeved in the middle of the threaded rod, abuts against the right end of the clamping surface and the inner side of the wing nut, respectively, providing continuous preload compensation during nut tightening to prevent loosening caused by vibration. The wedge-shaped structure of the anti-slip texture creates a self-locking effect in the vertical direction, resisting the shear force of landing impact; in the horizontal direction, it suppresses bracket torsion by increasing the roughness of the contact surface. This design ensures that the fixing component 2 maintains a constant clamping force during long-term use, preventing displacement of the positioning bracket 1 due to wear on the landing gear 6 surface or attenuation of clamping force, and providing a fundamental guarantee for the precise fit between the positioning hole 3 and the positioning post 5.

[0032] In some implementations, the bottom of the positioning column 5 is provided with an annular mounting flange, which is connected to the center of the bearing surface of the observation pile 4 by circumferentially distributed fasteners, and the axis of the positioning column 5 coincides with the normal of the bearing plane of the observation pile 4.

[0033] Specifically, the bottom of the positioning column 5 is machined with an annular mounting flange, with four bolt holes evenly distributed around the flange circumference. A threaded metal base is pre-embedded on the bearing surface of the observation pile 4, with the axis of the center hole of the base aligned with the normal to the bearing plane. During installation, circumferentially distributed fasteners (such as hexagonal socket head cap screws) pass through the flange bolt holes and screw into the threaded holes of the base, ensuring the positioning column 5 is vertically fixed to the center of the base. A leveling shim can be installed between the flange and the base to compensate for surface unevenness of the observation pile 4. This installation structure disperses local stress through the rigid support of the flange, preventing root fracture of the positioning column 5 under lateral forces; the evenly distributed circumferential fasteners eliminate deflection moments caused by single-point forces. The forced alignment of the axis of the positioning column 5 with the normal to the bearing plane of the observation pile 4 ensures that even if the observation pile 4 is tilted as a whole, the positioning column 5 maintains its designed vertical position, ensuring that the fitting trajectory of the positioning hole 3 always follows the vertical direction. This design decouples the macroscopic deformation of the observation pile 4 from the spatial attitude of the positioning column 5, requiring only the initial verticality of the positioning column 5 during installation to maintain long-term positioning accuracy.

[0034] In some implementations, the inner edge of the annular frame of the positioning bracket 1 forms a conical guide surface, with the small end of the guide surface facing the observation pile 4 and the large end of the guide surface smoothly connected to the inner wall of the positioning hole 3.

[0035] Specifically, the inner edge of the annular frame of the positioning bracket 1 is machined into a conical guide surface, which is integrally formed using a CNC lathe. The small end of the guide surface smoothly connects to the top of the inner wall of the positioning hole 3, while the edge of the large end extends to the edge of the upper surface of the annular frame. When there is a horizontal deviation during the initial landing of the UAV, the top of the positioning post 5 first contacts the edge of the large end of the guide surface and slides along the conical surface towards the center under the action of gravity until it enters the area of ​​the positioning hole 3. The design of the cone angle of the guide surface needs to balance the guiding efficiency and structural strength: a smaller cone angle increases the guiding distance but is prone to fabric effects, while a larger cone angle shortens the guiding stroke but requires thicker material to resist impact. The flared structure extends from the edge of the small end towards the observation post 4, and its flare angle is greater than that of the cone angle of the guide surface, used to capture the positioning post 5 during extreme deviations. The core function of the conical guide surface is to transform the precise positioning of the UAV at the end of its landing into a coarse positioning problem, reducing the accuracy requirements of the visual recognition system by actively correcting the horizontal position deviation. This structure can increase the allowable initial landing deviation by several times, significantly improving the success rate of the first landing in complex environments.

[0036] In some implementations, the anti-slip texture consists of staggered wedge-shaped protrusions with the tips of the wedges pointing towards the direction of the drone's descent. A compression spring is fitted into the middle of the threaded rod, with the two ends of the spring abutting the right end of the clamping surface and the wing nut, respectively.

[0037] Specifically, the anti-slip texture consists of a precision-stamped array of wedge-shaped protrusions, with the tips of the wedges precisely facing the expected force direction of the landing gear 6 during UAV landing (i.e., vertically downwards). When the locking mechanism applies clamping force, the wedge-shaped ramps engage with the surface of the landing gear 6. Under landing impact loads, the wedge structure resists vertical displacement through the tip-embedded coating, while the ramps suppress horizontal slippage. The compression spring in the middle of the threaded rod is compressed when the nut is tightened, and its restoring force continuously counteracts the relaxation of the clamping surface caused by vibration. The wing-shaped structure of the wing nut facilitates manual operation, and its inner surface has an annular positioning groove machined in the contact area with the spring end face to prevent spring dislodgement. This combined design provides triple protection: the mechanical self-locking of the wedge-shaped protrusions provides static holding force, the spring preload compensates for dynamic vibration relaxation, and the threaded connection allows manual adjustment of the clamping force. Compared to a smooth clamping surface, this structure increases the coefficient of friction several times, and after wear, effective clamping can be re-established by tightening the nut, significantly extending the service life of the device. Especially in rainy weather when the landing gear surface is slippery, the wedge-shaped protrusions can pierce the water film and maintain reliable adhesion.

[0038] In some implementations, the top of the positioning post 5 is a tapered guide head, the maximum diameter of which is equal to the outer diameter of the positioning post 5, and the side of the guide head forms a constant acute angle with the axis of the positioning post 5.

[0039] Specifically, the top of the positioning post 5 is machined into a tapered guide head, the maximum diameter of which is equal to the outer diameter of the positioning post 5, achieving a seamless contour transition. The side of the guide head maintains a constant acute angle with the axis of the positioning post 5, forming a continuous and smooth conical surface. When there is a horizontal deviation in the initial stage of the UAV's landing, the conical surface of the guide head first contacts the inner edge of the conical guide surface of the positioning bracket 1, using the inclined surface to convert the horizontal offset into a vertical path correction. The constant acute angle design ensures that the guiding force is consistent in direction, avoiding sudden angle changes that could cause attitude oscillations in the UAV. Under extreme offset conditions, the conical surface of the guide head and the conical guide surface form a two-stage guidance system: first, the large-diameter area of ​​the guide head captures the position of the positioning hole 3, and then the conical surface contraction forces centering. This structure significantly reduces the initial alignment accuracy threshold; the measured allowable initial lateral deviation can reach several times the diameter of the positioning hole 3. The top of the guide head is machined into a small flat surface rather than a sharp point to prevent impact deformation while maintaining the guiding function. Compared to a flat-top positioning post, the tapered guide head significantly improves the landing success rate, especially performing excellently under strong crosswind interference.

[0040] In some implementations, the large end edge of the conical guide surface is flush with the upper surface of the positioning bracket 1, and the small end edge extends towards the observation pile 4 to form a trumpet-shaped structure, with the cone angle of the guide surface being 30° to 60°.

[0041] Specifically, the large edge of the conical guide surface is flush with the upper surface of the positioning bracket 1, eliminating any protrusions that could snag the drone. The small edge extends towards the observation post 4, forming a flared structure with an flare angle greater than the cone angle of the main body of the conical guide surface. This flared structure provides secondary capture capability when the positioning post 5 deviates at extreme points: when the positioning post 5 approaches the edge of the positioning hole 3 without contacting the main body of the guide surface, the inner wall of the flared structure intercepts the positioning post 5 and guides it into the guide surface area. The cone angle range of the guide surface needs to satisfy two conflicting requirements: a smaller cone angle provides gentle guidance but increases the overall height of the bracket; a larger cone angle shortens the guidance stroke but requires higher material strength to resist impact. The depth of the flared structure needs to cover the maximum expected deviation of the positioning post 5, and its inner wall radius of curvature is greater than the radius of the positioning post 5 to avoid jamming. This combined design allows the device to expand the effective capture area several times while maintaining a compact volume, significantly improving its tolerance to the initial landing angle of the drone.

[0042] In some implementations, four circumferentially distributed air guide grooves are opened on the side of the tapered guide head. The air guide grooves extend from the top of the guide head to the surface of the positioning post 5, and the groove depth decreases uniformly along the height direction.

[0043] Specifically, four circumferentially distributed air guide grooves are opened on the side of the tapered guide head, extending from the top of the guide head along the generatrix to the surface of the positioning post 5. The cross-section of the air guide groove is U-shaped, and the groove depth decreases uniformly from the top to the post along the height direction until it reaches zero. When the positioning hole 3 is fitted into the positioning post 5, the air guide groove forms a through airflow channel, allowing the air trapped in the gap between the positioning hole 3 and the positioning post 5 to be quickly discharged. The groove depth decreasing design achieves a dual function: the deep groove at the top prioritizes breaking the airtightness, while the shallow groove on the post maintains the structural strength. The circumferential distribution of the four air guide grooves ensures that there is an exhaust path in any direction, avoiding the tilting of the UAV due to unilateral air pressure imbalance. This structure effectively eliminates the "air cushion effect"—that is, the reverse thrust generated by the compression of the enclosed air during the rapid fitting process. This reverse thrust has caused the UAV to repeatedly bounce at the critical height of the observation post 4 surface. The positioning post 5 with air guide grooves reduces the peak landing impact force and eliminates the phenomenon of the positioning hole 3 getting stuck halfway due to gas obstruction.

[0044] In some implementations, the bearing surface of the observation pile 4 is fitted with a metal base, the center of which is provided with a threaded connection hole, and the bottom of the positioning column 5 is machined with a matching external thread section. The positioning column 5 is vertically fixed to the center of the base through a threaded connection.

[0045] Specifically, a metal base is embedded in the bearing surface of the observation pile 4, with a blind hole with internal threads machined at the center of the base. The bottom of the positioning column 5 has an external thread section that matches the internal thread of the base, and it is vertically fixed to the center of the base via a threaded connection. During installation, a level is used to calibrate the base plane, and after screwing the positioning column 5 to the predetermined depth, thread sealant is applied to prevent loosening. This threaded connection structure has a self-centering characteristic: during tightening, the lateral force of the thread automatically corrects minor eccentricities, ultimately aligning the axis of the positioning column 5 with the centerline of the base. Compared to flange connections, the threaded connection saves installation space and requires no additional fasteners, making it particularly suitable for small observation piles 4. The pre-embedded depth of the base must ensure that the pull-out force is greater than the maximum expected lateral force, and its outer edge can be machined with radial serrations to enhance the bond strength with concrete. The bottom end face of the positioning column 5 is designed as a spherical surface, automatically adapting to minor unevenness of the base bottom surface during tightening. This solution simplifies installation verticality control to a single base calibration; subsequent replacement of the positioning column 5 does not require re-leveling, significantly reducing maintenance costs.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A rotorcraft assisted landing positioning device, comprising: It includes a positioning bracket (1), a fixing component (2), a positioning hole (3), an observation stake (4), and a positioning column (5); The positioning bracket (1) is a ring-shaped metal frame. Four mounting parts are symmetrically arranged on the outer edge of the positioning bracket (1). Each mounting part is fixedly connected to a fastener (2). A cylindrical positioning hole (3) is provided through the central area of ​​the frame. The fastener (2) includes an arc-shaped clamping surface that matches the outer contour of the end of the UAV landing gear (6). The two ends of the clamping surface are connected by a locking mechanism so that the fastener (2) covers and fixes the circumferential surface of the end of the landing gear (6). The center of the bearing surface of the observation pile (4) is vertically fixed to the positioning column (5), and the axis of the positioning column (5) is perpendicular to the bearing plane of the observation pile (4). The inner wall of the positioning hole (3) and the outer wall of the positioning post (5) form a clearance fit structure.

2. The rotorcraft assisted landing positioning device of claim 1, wherein, The inner side of the arc-shaped clamping surface of the fixing member (2) is provided with anti-slip texture. The locking mechanism includes a threaded rod that passes through both ends of the clamping surface. One end of the threaded rod is hinged to the left end of the clamping surface, and the other end passes through the right end of the clamping surface and is screwed onto a wing nut.

3. The rotorcraft assisted landing positioning device of claim 1, wherein, The bottom of the positioning column (5) is provided with an annular mounting flange. The flange is connected to the center of the bearing surface of the observation pile (4) by fasteners distributed around the circumference. The axis of the positioning column (5) coincides with the normal line of the bearing plane of the observation pile (4).

4. The rotorcraft assisted landing positioning device of claim 1, wherein, The inner edge of the annular frame of the positioning bracket (1) forms a conical guide surface, with the small end of the guide surface facing the observation pile (4) and the large end of the guide surface smoothly connected to the inner wall of the positioning hole (3).

5. The rotorcraft assisted landing positioning device of claim 2, wherein, The anti-slip texture consists of staggered wedge-shaped protrusions with the tips of the wedge-shaped protrusions pointing towards the direction of the drone's descent. A compression spring is sleeved in the middle of the threaded rod, with the two ends of the spring abutting the right side of the clamping surface and the wing nut, respectively.

6. The rotorcraft assisted landing positioning device of claim 3, wherein, The top of the positioning post (5) is a tapered guide head, the maximum diameter of which is equal to the outer diameter of the positioning post (5), and the side of the guide head forms a constant acute angle with the axis of the positioning post (5).

7. The rotorcraft assisted landing positioning device of claim 4, wherein, The large end edge of the conical guide surface is flush with the upper surface of the positioning bracket (1), and the small end edge extends towards the observation pile (4) to form a trumpet structure. The cone angle of the guide surface is 30° to 60°.

8. The rotorcraft assisted landing positioning device of claim 6, wherein, The tapered guide head has four circumferentially distributed air guide grooves on its side. The air guide grooves extend from the top of the guide head to the surface of the positioning column (5), and the groove depth decreases uniformly along the height direction.

9. The rotor UAV assisted landing positioning device of claim 1, wherein, The observation pile (4) has a metal base embedded on its bearing surface. The base has a threaded connection hole in the center. The positioning column (5) has a matching external thread section at the bottom. The positioning column (5) is vertically fixed to the center of the base by the threaded connection.

Images