A remote sensing surveying and mapping device for 3D modeling of mountain photovoltaic power stations

Abstract

The present application relates to remote sensing surveying and mapping technical field, specifically a kind of remote sensing surveying and mapping equipment for mountain photovoltaic power station 3D modeling;Including whole target piece;The whole target piece is spliced by four sub-target pieces with two colors;The sub-target piece is cloth material and the shape is isosceles triangle;The sub-target piece middle fixedly connected with framework;Four the framework one end is connected with center block by frame block;Four the framework is evenly distributed into "cross shape" around center block;The framework is provided with insertion slot away from center block one end;The present application is matched with the structure of sub-target piece with color-changing and whole target piece with free splicing combination, can flexibly adjust target size and identification color according to mountain photovoltaic power station different surveying and mapping distance, terrain space, illumination intensity, identification accuracy demand, to completely solve the technical problem that traditional fixed size target adaptability is poor, coordinate anchoring precision is low.

Description

Technical Field

[0001] This invention relates to the field of remote sensing mapping and marking technology, specifically a remote sensing mapping device for 3D modeling of mountain photovoltaic power stations. Background Technology

[0002] With the global energy structure transformation and the advancement of dual-carbon goals, mountain photovoltaic power stations have been widely adopted due to their advantages such as large land area, excellent solar resources, and no occupation of arable land. However, large-scale mountain photovoltaic power stations urgently need to build high-precision 3D models through digital twin technology to achieve intelligent operation and maintenance and precise control, due to problems such as large terrain undulations, scattered equipment distribution, and difficulty in operation and maintenance positioning. The 3D modeling of mountain photovoltaic power stations relies heavily on remote sensing mapping to obtain real terrain and equipment spatial data. During the remote sensing mapping process, targets need to be set up to provide coordinate references for UAV images. By anchoring spatial positions with targets and correcting image distortion and aerial survey drift, the geometric accuracy of the 3D model can be guaranteed, avoiding problems such as model offset, misalignment, and deformation. This ensures the accurate positioning of equipment such as photovoltaic modules, inverters, and transformer substations, supporting the implementation of subsequent navigation, operation and maintenance, and fault diagnosis functions.

[0003] Existing remote sensing mapping targets are mostly fixed-size integrated structures, which cannot flexibly adjust their size according to the complexity of mountainous terrain, surveying distance, lighting conditions, and equipment deployment space. In mountainous photovoltaic power station scenarios, areas such as steep slopes, dense forests, and narrow platforms cannot accommodate the deployment of large-size targets, which can easily lead to problems such as target occlusion, unstable placement, and difficulty in identification. In open areas and long-distance surveying, small-size targets have the disadvantages of insufficient image recognition accuracy and large coordinate anchoring errors. Fixed-size targets have poor versatility, are inconvenient to carry, and are only suitable for a limited range of scenarios, making it difficult to meet the multi-environment, multi-scale, and high-precision remote sensing mapping needs of mountainous photovoltaic power stations. The inability to adjust the target size will directly lead to poor image coordinate correction, exacerbate the risk of model drift, and reduce the accuracy of 3D modeling and the reliability of intelligent operation and maintenance systems. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a remote sensing mapping device for 3D modeling of mountain photovoltaic power stations. This invention combines a flip-up, color-adjustable target sheet with a freely combinable whole target sheet structure. The target size and identification color can be flexibly adjusted according to different mapping distances, terrain spaces, light intensity, and recognition accuracy requirements of mountain photovoltaic power stations. This completely solves the technical problems of poor adaptability and low coordinate anchoring accuracy of traditional fixed-size targets, thereby significantly improving the coordinate correction effect of remote sensing mapping, reducing the risk of 3D model drift, misalignment, and deformation, and ensuring the geometric accuracy of 3D modeling of mountain photovoltaic power stations.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A remote sensing mapping device for 3D modeling of mountain photovoltaic power stations, comprising a whole target sheet; the whole target sheet is composed of four sub-target sheets with two colors on each side; the sub-target sheets are made of fabric and are isosceles triangular in shape; a frame is fixedly connected to the middle of each sub-target sheet; one end of each of the four frames is connected to a central block via a frame block; the four frames are evenly distributed around the central block in a "cross shape"; an insertion slot is provided at the end of the frame away from the central block; an insertion block is movably connected within the insertion slot; the insertion... The inner and outer walls of the connecting groove are provided with through grooves; a through rod connected to the plug block is movably connected in the through groove; the frame block is provided with a rotating groove facing the outer wall of the skeleton; a rotating block fixedly connected to the skeleton is rotatably connected in the rotating groove; both the rotating groove and the rotating block have T-shaped cross sections; a square groove is provided at the bottom of the rotating groove; an L-shaped groove is provided on the side of the rotating block facing the square groove and communicating with the arc-shaped outer wall of the skeleton; an L-shaped block is slidably connected in the L-shaped groove; the side of the L-shaped block away from the center block is connected to the inner wall of the L-shaped groove by a first spring; one end of the L-shaped block can be inserted into the square groove, and the other end protrudes from the opening of the L-shaped groove.

[0006] Preferably, the outer edge of the central block is uniformly provided with stacking grooves; the stacking grooves are rotatably connected to the stacking holes on the inner wall and the stacking rods fixedly connected to the end of the frame block; the edge of the target piece is fixedly connected with a strap; the two ends of the strap are respectively fixedly connected to a rough surface and a hook surface that can be glued to each other.

[0007] Preferably, the outer wall of the frame block is provided with a frame groove; the center of the central block is provided with a central groove communicating with the stacking groove; a central disk is rotatably connected in the central groove; a central hole is provided through the central groove facing upward; a torsion bar with a torsion block is rotatably connected to the central hole; the torsion bar is torsionally connected to the inner wall of the central hole by a first torsion spring; the torsion bar is fixedly connected to the central disk; a first notch is uniformly provided on the circular edge of the central disk; the edge of the central disk without the first notch can be inserted into multiple frame grooves of the frame block.

[0008] Preferably, the target piece has a second notch at the end near the center block that adapts to the outer edge of the center block; a first support bar is fixedly connected to the arc-shaped outer wall of the skeleton near the frame block; the first support bar is fixedly connected to the target piece; a second support bar is fixedly connected to the arc-shaped outer wall of the skeleton away from the frame block; the second support bar is fixedly connected to the target piece; a spreading rod is rotatably connected to the end of the second support bar away from the skeleton; the spreading rod extends to the corner of the target piece.

[0009] Preferably, the unfolding rod has a hook at the end away from the second support bar; a half dumbbell block is fixedly connected to the corner of the target plate away from the skeleton; the half dumbbell blocks on two adjacent target plates are combined to form a whole dumbbell block; the inner side of the whole dumbbell block can be hooked by the hook of the unfolding rod.

[0010] Preferably, the second support bar is rotatably connected to one end of the unfolding rod via a second torsion spring; the two unfolding rods on the same sub-target are located on different sides.

[0011] Preferably, the end of the through rod is provided with an anti-slip feature; the plug block includes a socket, a plug, a second spring, and a pull rope; the socket has a seat groove on the side opposite to the center block; two plugs are slidably connected in the seat groove; the two plugs are connected by the second spring; the middle part of the through rod passes through the seat groove, and the outer wall of the through rod is connected to the plug by the pull rope; the end of the plug away from the socket is provided with a hook; the inner wall of the plug groove is symmetrically provided with locking grooves; the hook of the plug can be engaged in the locking groove.

[0012] Preferably, the upper and lower inner walls of the seat groove are provided with auxiliary grooves, and an auxiliary block that is fixedly connected to the insert is slidably connected in the auxiliary groove.

[0013] Preferably, the locking groove has a transition groove at the end near the bottom of the insertion groove; the plug has an inclined guide angle at the end away from the socket.

[0014] The beneficial effects of this invention are as follows: 1. This invention combines a flip-up, color-adjustable target sheet with a freely combinable whole target sheet structure. This allows for flexible adjustment of the target size and identification color according to different surveying distances, terrain spaces, light intensity, and recognition accuracy requirements of mountain photovoltaic power stations. This completely solves the technical problems of poor adaptability and low coordinate anchoring accuracy of traditional fixed-size targets, thereby significantly improving the coordinate correction effect of remote sensing mapping, reducing the risk of 3D model drift, misalignment, and deformation, and ensuring the geometric accuracy of 3D modeling of mountain photovoltaic power stations.

[0015] 2. This invention utilizes a self-locking unfolding and folding structure composed of a torsion block, a torsion bar, a first torsion spring, a central disc, a frame groove, and a folding groove. Combined with a quick-binding structure using a hook-and-loop strap, this allows for one-click unlocking and unfolding of the entire target sheet, automatic locking and fixing, and rapid folding and binding. This significantly improves the unfolding stability and folding portability of the target in mountainous photovoltaic power station surveying scenarios, thereby effectively increasing field operation efficiency and reducing the difficulty of carrying equipment.

[0016] 3. The present invention, through the cooperation of the first support bar, the second support bar, the unfolding bar with the hook, the second torsion spring, and the hooking structure of the half dumbbell block and the whole dumbbell block, can make the fabric target sheet fully unfolded, the edges pressed, and the corners locked in mountainous environments, thereby solving the problems of the target sheet being easy to lift, wrinkle, and have poor stability, and thus significantly improving the target recognition accuracy and coordinate anchoring reliability in remote sensing mapping. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional view of the assembled components of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 2 Enlarged view of point B in the middle; Figure 5 yes Figure 2 Enlarged view of point C in the middle; Figure 6 This is a radial cross-sectional view of the central block of the present invention; Figure 7 This is an axial sectional view of the central block of the present invention; Figure 8 This is a cross-sectional view of the plug-in block in this invention; Figure 9 This is a diagram showing the position of the auxiliary blocks in this invention; Figure 10 This is a position diagram of the second torsion spring in this invention; Figure 11 This is a perspective view of a single sub-target piece in this invention; Figure 12 yes Figure 11 Enlarged view of point D in the middle.

[0019] In the diagram: Target plate 1, Strap 11, Textured surface 111, Hook surface 112, Second notch 12, Half dumbbell block 13, Frame 2, Locking groove 20, Transition groove 201, Insertion groove 21, Through groove 22, L-shaped groove 23, L-shaped block 24, First spring 25, First support bar 26, Second support bar 27, Unfolding rod 28, Second torsion spring 29, Frame block 3, Rotating groove 31, Rotating block 32, Square groove 33, Folding rod 34, Frame groove 35, Center block 4, Folding groove 41, Folding hole 42, Center groove 43, Center disc 44, Center hole 45, Torsion bar 46, Torsion block 47, First torsion spring 48, First notch 49, Insertion block 5, Through bar 51, Socket 52, Insert bar 53, Guide angle 531, Second spring 54, Pull rope 55, Seat groove 56, Auxiliary groove 57, Auxiliary block 58. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 12 As shown, the present invention includes the following embodiments: Example 1: A remote sensing mapping device for 3D modeling of mountain photovoltaic power stations includes a whole target sheet; the whole target sheet is composed of four sub-target sheets 1 with two colors on each side; the sub-target sheets 1 are made of fabric and are isosceles triangular in shape; a frame 2 is fixedly connected to the symmetrical center position of the sub-target sheets 1; one end of the four frames 2 is connected to a central block 4 through a frame block 3; the four frames 2 are evenly distributed around the central block 4 in a "cross shape"; an insertion groove 21 is provided at the end of the frame 2 away from the central block 4; an insertion block 5 is movably connected in the insertion groove 21; a through groove 22 is provided on the inner and outer walls of the insertion groove 21; a movable through groove 22 is provided in the through groove 22. A through rod 51 is movably connected to the insertion block 5; a rotating groove 31 is provided on the outer wall of the frame 2 facing the frame 2; a rotating block 32 fixedly connected to the frame 2 is rotatably connected in the rotating groove 31; both the rotating groove 31 and the rotating block 32 have T-shaped cross sections; a square groove 33 is provided at the bottom of the rotating groove 31; an L-shaped groove 23 is provided on the side of the rotating block 32 facing the square groove 33 and communicating with the arc-shaped outer wall of the frame 2; an L-shaped block 24 is slidably connected in the L-shaped groove 23; the side of the L-shaped block 24 away from the center block 4 is connected to the inner wall of the L-shaped groove 23 by a first spring 25; one end of the L-shaped block 24 can be inserted into the square groove 33, and the other end protrudes out of the opening of the L-shaped groove 23.

[0022] Before conducting 3D modeling for a large-scale mountain photovoltaic power station, remote sensing mapping must be performed to obtain accurate terrain and equipment spatial data. During remote sensing mapping, targets need to be deployed as image control points to provide accurate coordinates for UAV images, correcting image drift and preventing 3D model offset. At this time, operators need to carry multiple target pieces from this invention to the selected mapping location within the mountain photovoltaic power station. Upon arrival, the number of target pieces required is determined based on the mapping distance, on-site lighting conditions, terrain size, and image recognition accuracy requirements. After retrieving the selected number of target pieces, color adjustment is performed on each individual target piece. The operator manually moves the L-shaped block 24 protruding from... One end of the L-shaped groove 23 is outside the groove opening, allowing the L-shaped block 24 to overcome the elastic force of the first spring 25 and slide away from the center block 4. During the sliding process of the L-shaped block 24 inside the L-shaped groove 23, the end of it inserted into the square groove 33 will gradually move completely out of the square groove 33, so that the locking state of the rotating block 32 in the rotating groove 31 is released. The T-shaped rotating block 32 can rotate stably in cooperation with the rotating groove 31. The operator then rotates the frame 2, and the frame 2 drives the rotating block 32 to rotate in a circle in the rotating groove 31 until the frame 2 and the dividing target piece 1 rotate 180° as a whole, so as to achieve the complete flipping of the isosceles triangular fabric dividing target piece 1, and switch the upward side of the dividing target piece 1 to the desired color, which is usually red and white.

[0023] After flipping, the operator releases the L-shaped block 24. The first spring 25, under its own elasticity, drives the L-shaped block 24 to slide back along the L-shaped groove 23, resetting it. One end of the L-shaped block 24 is reinserted into the square groove 33, locking the rotating block 32 back into the rotating groove 31, thus maintaining a fixed posture between the frame 2 and the target piece 1, preventing further rotation. After color adjustment of all the target pieces to be used, the target pieces are placed stably on the mountain ground and unfolded flat, ensuring that adjacent target pieces are close together and their edges are aligned. The positions are adjusted so that the ends of the frame 2 on adjacent target pieces are precisely aligned, ensuring that the insertion grooves 21 at the ends of the two frame 2 are complete. The entire axis is aligned coaxially. Then, the operator pushes the penetrating rod 51 by hand, so that the penetrating rod 51 moves along the penetrating groove 22 away from the corresponding center block 4. During the movement of the penetrating rod 51, the insertion block 5 moves together, so that the insertion block 5 extends outward from the insertion groove 21 of the current skeleton 2 and is stably inserted into the insertion groove 21 of the adjacent skeleton 2, so as to realize the rigid insertion connection between the two adjacent skeletons 2. By connecting them in the above manner, multiple whole target pieces can be spliced ​​together to form a complete square or rectangular combined target piece. They can be spliced ​​into different sizes such as 1 piece, 4 pieces, and 9 pieces according to the surveying and mapping requirements to meet the target size requirements of different surveying and mapping scenarios.

[0024] After assembly, the combined target sheet remains flat and stretched under the support and pressure of the frame 2, preventing wrinkles or swaying due to mountainous terrain undulations or wind disturbances, thus improving image recognition stability. After the combined target sheet is deployed and fixed, the UAV can be activated to conduct remote sensing mapping operations, acquiring aerial images with precise coordinate references for subsequent 3D modeling of mountain photovoltaic power stations. Once the mapping operation is completed, the target is disassembled and retrieved. The operator reverses the through rod 51, causing it to move along the through groove 22 towards the corresponding center block 4. The through rod 51 drives the insertion block 5 to move synchronously, completely disengaging the insertion block 5 from the insertion groove 21 of the adjacent frame 2, thus terminating the insertion connection between the two adjacent frames 2. All the combined target sheets are then disassembled sequentially, restoring them to the state of individual target sheets. Individual target sheets are small in size and light in weight, and can be folded for easy carrying, transportation, and storage in complex mountainous environments, completing the entire process of using the remote sensing mapping target.

[0025] This invention combines a flip-up, color-adjustable target sheet 1 with a freely combinable whole target sheet structure. This allows for flexible adjustment of the target size and identification color based on different surveying distances, terrain, light intensity, and recognition accuracy requirements of mountain photovoltaic power stations. This completely solves the technical problems of poor adaptability and low coordinate anchoring accuracy of traditional fixed-size targets, thereby significantly improving the coordinate correction effect of remote sensing mapping, reducing the risk of 3D model drift, misalignment, and deformation, and ensuring the geometric accuracy of 3D modeling for mountain photovoltaic power stations.

[0026] This invention utilizes the locking and rotating structure of L-shaped block 24, square groove 33, rotating block 32, and rotating groove 31 to quickly achieve the flipping, positioning, and locking of the target piece 1. The operation steps are simple and require no tools, thereby greatly improving the efficiency of field target deployment and meeting the needs of large-scale, multi-point, and fast-paced surveying operations for mountain photovoltaic power stations.

[0027] The present invention uses a quick-connect structure consisting of a frame 2 end insertion slot 21, an insertion block 5, and a through rod 51 to achieve seamless splicing and quick disassembly of multiple whole target pieces. After splicing, a large-size stable target is formed, and after disassembly, it is restored to a small-volume single structure. This balances the stability of surveying and mapping with the portability of mountain transportation, effectively reducing the difficulty of target handling and deployment in complex mountainous terrain.

[0028] Example 2: The outer edge of the central block 4 is uniformly provided with a stacking groove 41; the stacking groove 41 is rotatably connected to the stacking hole 42 on the inner wall and the stacking rod 34 fixedly connected to the end of the frame block 3; the edge of the target piece 1 is fixedly connected with a strap 11; the two ends of the strap 11 are respectively fixedly connected with a rough surface 111 and a hook surface 112 that can be glued to each other.

[0029] In this embodiment, the outer wall of the frame block 3 is provided with a frame groove 35; the center of the central block 4 is provided with a central groove 43 that communicates with the stacking groove 41; a central disk 44 is rotatably connected inside the central groove 43; a central hole 45 is provided through the central groove 43 facing upward; a torsion bar 46 with a torsion block 47 is rotatably connected to the central hole 45; the torsion bar 46 is twisted to the inner wall of the central hole 45 by a first torsion spring 48; the torsion bar 46 is fixedly connected to the central disk 44; a first notch 49 is uniformly provided on the circular edge of the central disk 44; the edge of the central disk 44 without the first notch 49 can be inserted into multiple frame grooves 35 of the frame block 3.

[0030] Before using this remote sensing and mapping equipment, the target sheet needs to be unfolded from its folded state to its usable state. The operator first rotates the torsion block 47 above the center hole 45 by hand. After the torsion block 47 is subjected to force, it drives the torsion bar 46 to rotate. During the rotation, the torsion bar 46 will overcome the torque of the first torsion spring 48 and rotate stably inside the center hole 45. At the same time as the torsion bar 46 rotates, it will drive the center disk 44 inside the center groove 43 to rotate together. After the center disk 44 rotates to a specific angle in the center groove 43, the four first notches 49 on its circular edge will be aligned with the grooves 35 on the outer walls of the four support blocks 3. When the first notches 49 are aligned with the grooves 35, the edge of the center disk 44 that was originally stuck in the groove 35 without the first notches 49 will completely exit from the groove 35. The locked state of the support block 3 in the folding groove 41 is completely released. At this time, the support block 3 is in an unlocked state that can be freely rotated.

[0031] After unlocking, the operator pulls open the binding strap 11 on the edge of the target piece 1, and tears the rough side 111 at one end of the binding strap 11 and the hook side 112 at the other end apart, so that the binding strap 11 no longer binds the target piece 1, and the target piece 1 and the frame 2 return to a free state; then the operator rotates the four frames 2 outward at the same time. When the frames 2 rotate, they will drive the bottom frame block 3 to move synchronously. The frame block 3 rotates freely in the folding hole 42 on the inner wall of the folding groove 41 with its folding rod 34 at its end as the axis; the four frames 2 gradually unfold outward until they are evenly distributed in a cross shape. The four isosceles triangular target pieces 1 are fully unfolded synchronously with the frames 2, splicing together to form a complete target piece; when the complete target piece is fully unfolded into place, the frame groove 35 on the outer wall of the frame block 3 will be aligned with the center groove 43 again.

[0032] At this point, the operator releases the torsion block 47. Under the action of its own restoring torque, the first torsion spring 48 drives the torsion bar 46 to rotate. The torsion bar 46 drives the center disc 44 to rotate in the opposite direction. The complete edge of the center disc 44 without the first notch 49 will re-engage into the slot 35 of the frame block 3, firmly locking the frame block 3 in the stacking slot 41. This prevents the frame block 3 from rotating around the stacking bar 34, thus keeping the frame 2 and the target piece 1 in a stable unfolded state, preventing them from shaking, deflecting, or collapsing during the surveying process. After the surveying work is completed, the entire target piece needs to be stacked for carrying. The operator rotates the torsion block 47 again, causing the torsion bar 46 to overcome the first torsion spring 48 and drive the center disc 44 to rotate. This allows the first notch 49 of the center disc 44 to realign with the slot 35, and the edge of the center disc 44 to exit from the slot 35. The frame block 3 is then unlocked again.

[0033] After unlocking, the operator rotates the four frames 2 inward. The frames 2 drive the frame blocks 3 and the folding rods 34 to rotate in opposite directions within the folding grooves 41. The four frames 2 gradually move closer to the center block 4 and close together. The fabric target pieces 1 fold and close together synchronously with the frames 2. After closing, the straps 11 are wrapped around the outside of the folded target pieces 1 and the frames 2 to bond the rough side 111 and the hook side 112 of the straps 11 together, keeping the entire target piece in a closed shape. Finally, the torsion block 47 is released, and the first torsion spring 48 drives the torsion rods 46 and the center plate 44 to reset. The edge of the center plate 44 without the first notch 49 is inserted into the corresponding frame groove 35 again, locking the frame blocks 3 in the folding grooves 41. This keeps the entire target piece stable in the closed state and prevents it from falling apart, making it easy to carry, transport, and store in complex mountainous environments.

[0034] This invention utilizes a self-locking unfolding and folding structure composed of a twist block 47, a twist bar 46, a first torsion spring 48, a central disc 44, a frame groove 35, and a folding groove 41. This structure, combined with a quick-binding structure using straps 11 (rough surface 111, hook surface 112), enables the entire target sheet to be unlocked and unfolded with a single click, automatically locked and fixed, and quickly folded and bound. This significantly improves the unfolding stability and folding portability of the target in mountainous photovoltaic power station surveying scenarios, thereby effectively improving field operation efficiency and reducing the difficulty of carrying equipment.

[0035] Example 3: The target piece 1 has a second notch 12 at the end near the center block 4 that is adapted to the outer edge of the center block 4; the first support bar 26 is fixedly connected to the arc-shaped outer wall of the frame 2 near the frame block 3; the first support bar 26 is fixedly connected to the target piece 1; the second support bar 27 is fixedly connected to the arc-shaped outer wall of the frame 2 away from the frame block 3; the second support bar 27 is fixedly connected to the target piece 1; the second support bar 27 is rotatably connected to the end away from the frame 2 with an unfolding rod 28; the unfolding rod 28 extends to the corner of the target piece 1.

[0036] In this embodiment, the end of the unfolding rod 28 away from the second support 27 is provided with a hook; the corner of the target plate 1 away from the skeleton 2 is fixedly connected to a half dumbbell block 13; the half dumbbell blocks 13 on two adjacent target plates 1 are combined to form a whole dumbbell block; the inner side of the whole dumbbell block can be hooked by the hook of the unfolding rod 28.

[0037] In this embodiment, the second support 27 and one end of the unfolding rod 28 are rotatably connected by the second torsion spring 29; the two unfolding rods 28 on the same sub-target plate 1 are located on different sides.

[0038] When the target sheet is in a folded state and needs to be unfolded for use, the operator first tears apart the rough side 111 and hook side 112 of the edge binding strap 11 of the target sheet 1, releasing the binding strap 11 from the target sheet 1 and the frame 2; then the control block 3 is released from its locked state in the folding groove 41, allowing the four frames 2 to rotate freely outward around the folding groove 41 of the central block 4; the operator then smoothly unfolds the four frames 2 outward until the four frames 2 are evenly distributed in a standard cross shape, and the four isosceles triangular target sheets 1 are manually unfolded in sync with the frames 2. The unfolding rod 28 has a certain degree of bending elasticity, similar to the tough structure of an umbrella rib, and can adapt to deformation during unfolding and folding. The first support 26 unfolds synchronously with the frame 2, stably opening the end of the target piece 1 near the center block 4, ensuring that the inner area of ​​the target piece 1 is flat and wrinkle-free. Under the torsion of the second torsion spring 29, the second support 27 drives the unfolding rod 28 to automatically unfold outward. The unfolding rod 28 evenly presses the outer edge and corner of the target piece 1 away from the center block 4, so that the fabric target piece 1 is completely flat, without curling or lifting.

[0039] Furthermore, the corners of two adjacent target plates 1 are aligned with each other, and their respective half dumbbell blocks 13 are brought together to form a complete dumbbell block; the unfolding rods 28 on both sides of the same complete dumbbell block are located on different sides of the target plate 1, without causing motion interference; the second torsion spring 29 continuously provides unfolding torque to the unfolding rods 28, so that the hooks at the ends of the unfolding rods 28 stably hook the inner side of the complete dumbbell block; the four complete dumbbell blocks of the four target plates 1 are all firmly hooked by the corresponding hooks, so that the four target plates 1 form a shape at the corners. The interconnected overall structure significantly improves the stability of the whole target sheet in mountainous winds and undulating terrain, preventing the individual target sheets 1 from being blown away, wrinkled, or shifted by the wind. When the survey is completed and the whole target sheet needs to be folded up, the operator first overcomes the torque of the second torsion spring 29 and manually moves the unfolding rod 28 to disengage the hook at the end of the unfolding rod 28 from the inside of the whole dumbbell block. After the hook is disengaged, the whole dumbbell block can be separated into two independent half dumbbell blocks 13, and the corner positions of adjacent individual target sheets 1 are released from mutual locking.

[0040] The operator then unlocks the frame block 3 again, and folds the four frames 2 toward the center block 4. During the folding process, the operator simultaneously pinches the unfolding rod 28, causing it to fold and fold together with the target pieces 1. Finally, after all the target pieces 1 and frames 2 are completely folded together, the straps 11 are wrapped around the outermost side, and the rough surface 111 and hook surface 112 are used to bond and tie them together, thus completing the folding and fixing of the entire target piece, keeping the equipment in a compact state for easy carrying and transportation in mountainous environments.

[0041] The present invention, through the cooperation of the first support bar 26, the second support bar 27, the unfolding bar 28 with the hook, the second torsion spring 29, and the hooking structure of the half dumbbell block 13 and the whole dumbbell block, can make the fabric target piece 1 fully unfold, the edges pressed, and the corners locked in mountainous environments, thereby solving the problems of the target piece 1 being easy to lift, easy to wrinkle, and poor stability, and thus significantly improving the target recognition accuracy and coordinate anchoring reliability in remote sensing mapping.

[0042] Example 4: The end of the through rod 51 is provided with an anti-slip feature; the plug block 5 includes a socket 52, a plug 53, a second spring 54, and a pull rope 55; the socket 52 has a seat groove 56 on the side facing away from the center block 4; two plugs 53 are slidably connected in the seat groove 56; the two plugs 53 are connected by the second spring 54; the middle part of the through rod 51 passes through the seat groove 56, and the outer wall of the through rod 51 is connected to the plug 53 by the pull rope 55; the end of the plug 53 away from the socket 52 is provided with a hook; the inner wall of the plug groove 21 is symmetrically provided with locking grooves 20; the hook of the plug 53 can be inserted into the locking groove 20.

[0043] In this embodiment, the upper and lower inner walls of the seat groove 56 are provided with auxiliary grooves 57, and an auxiliary block 58 that is fixedly connected to the insert 53 is slidably connected in the auxiliary grooves 57.

[0044] In this embodiment, a transition groove 201 is provided at one end of the locking groove 20 near the bottom of the insertion groove 21; and an inclined guide angle 531 is provided at the end of the insert 53 away from the socket 52.

[0045] When it is necessary to splice and combine two adjacent whole target pieces, the operator first pre-adjusts the through rods 51 on all the skeletons 2; the operator moves the through rods 51 along the through groove 22 towards the corresponding center block 4. The end of the through rod 51 is equipped with an anti-slip setting to ensure that the moving process is stable and does not slip; as the through rod 51 moves along the through groove 22 towards the center block 4, it will drive the socket 52 and the insert 53 towards the bottom of the insertion groove 21; since the lock groove 20 is provided with a transition groove 201 at one end near the bottom of the insertion groove 21, under the smooth guiding effect of the transition groove 201, the hook part at the end of the insert 53 can smoothly pass through the lock groove 20, so that the socket 52 and the insert 53 can be completely moved to the innermost side of the insertion groove 21, leaving sufficient space for subsequent insertion and connection, forming an effective avoidance.

[0046] After pre-adjustment, the operator aligns the ends of the skeletons 2 on two adjacent target pieces, ensuring that the insertion slots 21 of the two skeletons 2 are coaxially and precisely aligned. Then, the operator moves the through rod 51 on one of the skeletons 2, causing it to extend along the through slot 22 away from the center block 4. Simultaneously, the through rod 51 drives the socket 52 and the insert 53 to gradually extend into the insertion slot 21 of the opposite (or opposing) skeleton 2. The insert 53 has an inclined guide angle 531 at its end away from the socket 52. Under the action of the spring, the two inserts 53 are squeezed by the inner wall of the insertion groove 21 of the other and overcome the elastic force of the second spring 54 to move closer to each other and smoothly enter the insertion groove 21. When the insert 53 moves to the position where the hook part is aligned with the locking groove 20 of the inner wall of the insertion groove 21, the second spring 54 pushes the two inserts 53 away from each other under its own elastic force, so that the hook part at the end of the insert 53 is stably locked into the corresponding locking groove 20, realizing the automatic locking and fixing between the two adjacent skeletons 2, and firmly connecting the two whole target pieces into a whole.

[0047] During the insertion process, the auxiliary block 58 and the auxiliary groove 57 cooperate to limit and guide the sliding trajectory of the insert 53, ensuring that the insert 53 can only stably approach or move away from each other in the seat groove 56 without deviation, shaking or jamming. When the survey is completed and it is necessary to separate the two whole target pieces, the operator rotates one of the through rods 51. During the rotation of the through rod 51, the pull rope 55 is continuously tightened. After the pull rope 55 is under force, it pulls the two inserts 53 to overcome the elastic force of the second spring 54 and move them closer to each other, so that the hook part at the end of the insert 53 is completely removed from the locking groove 20, releasing the locking state between the skeletons 2. Finally, the operator reverses the through rod 51, causing the socket 52 and the insert 53 to completely exit from the insertion groove 21 of the other skeleton 2, realizing the rapid unlocking and separation of the two adjacent skeletons 2, and completing the separation of the whole target piece.

[0048] This invention utilizes a self-locking plug-in structure consisting of a through rod 51, a hooked insert 53, a second spring 54, a locking groove 20, a guide angle 531, and an auxiliary block 58 and an auxiliary groove 57. This structure enables rapid plugging and locking of adjacent target pieces and rotational unlocking, thereby significantly improving the robustness and assembly / disassembly efficiency of the target assembly and ensuring the overall stability and reliability of the target structure in remote sensing mapping of mountain photovoltaic power stations.

[0049] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 2The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first," "second," "third," etc. are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, a fixed connection refers to a fixed connection. In the description of the present invention, a sliding connection refers to a connection where the two parts can only slide and cannot be separated. Specifically, the groove can be set to be concave and the block can be set to be convex, and the specific design can be adjusted according to the actual situation. A sliding fit refers to a connection where the two parts can slide and separate. In the description of the present invention, a rotating connection refers to a connection where the two parts can only rotate and cannot produce axial displacement. Specifically, an annular groove can be provided on the inner wall of the hole, and a ring that is rotatably connected to the groove can be fixedly connected to the outer wall of the shaft.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A remote sensing mapping device for 3D modeling of mountain photovoltaic power stations, comprising a complete target sheet; characterized in that: The target sheet is composed of four sub-target sheets, each with two colors, joined together. Each sub-target sheet is made of fabric and is isosceles triangular in shape. A frame is fixedly connected to the center of each sub-target sheet. One end of each of the four frames is connected to a central block via a frame block. The four frames are evenly distributed around the central block in a "cross" shape. A slot is provided at the end of each frame away from the central block. A connecting block is movably connected within the slot. Through grooves are provided on the inner and outer walls of the slot. A connecting block is movably connected within the through groove. A connecting rod; the frame block has a rotating groove facing the outer wall of the skeleton; a rotating block fixedly connected to the skeleton is rotatably connected in the rotating groove; both the rotating groove and the rotating block have a T-shaped cross-section; a square groove is provided at the bottom of the rotating groove; an L-shaped groove is provided on the side of the rotating block facing the square groove and communicating with the arc-shaped outer wall of the skeleton; an L-shaped block is slidably connected in the L-shaped groove; the side of the L-shaped block away from the center block is connected to the inner wall of the L-shaped groove by a first spring; one end of the L-shaped block can be inserted into the square groove, and the other end protrudes from the opening of the L-shaped groove.

2. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 1, characterized in that: The outer edge of the central block is uniformly provided with stacking grooves; the stacking grooves are rotatably connected to the stacking holes on the inner wall and the stacking rods fixedly connected to the end of the frame block; the edge of the target piece is fixedly connected with a strap; the two ends of the strap are respectively fixedly connected to the rough surface and the hook surface that can be glued to each other.

3. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 1, characterized in that: The outer wall of the frame block is provided with a frame groove; the center block is provided with a central groove that communicates with the stacking groove; a central disk is rotatably connected inside the central groove; a central hole is provided through the central groove facing upward; a torsion bar with a torsion block is rotatably connected to the central hole; the torsion bar is torsionally connected to the inner wall of the central hole by a first torsion spring; the torsion bar is fixedly connected to the central disk; a first notch is evenly provided on the circular edge of the central disk; the edge of the central disk without the first notch can be inserted into multiple frame grooves of the frame block.

4. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 3, characterized in that: The target piece has a second notch at one end near the center block that corresponds to the outer edge of the center block; a first support bar is fixedly connected to the arc-shaped outer wall of the skeleton near the frame block; the first support bar is fixedly connected to the target piece; a second support bar is fixedly connected to the arc-shaped outer wall of the skeleton away from the frame block; the second support bar is fixedly connected to the target piece; a spreading rod is rotatably connected to the end of the second support bar away from the skeleton; the spreading rod extends to the corner of the target piece.

5. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 4, characterized in that: The unfolding rod has a hook at the end away from the second support bar; a half dumbbell block is fixedly connected to the corner of the target plate away from the skeleton; the half dumbbell blocks on two adjacent target plates are combined to form a whole dumbbell block; the inner side of the whole dumbbell block can be hooked by the hook of the unfolding rod.

6. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 5, characterized in that: The second support bar is rotatably connected to one end of the unfolding rod via a second torsion spring; the two unfolding rods on the same sub-target are located on different sides.

7. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 1, characterized in that: The end of the through rod is provided with an anti-slip feature; the plug block includes a socket, a plug, a second spring, and a pull rope; the socket has a seat groove on the side facing away from the center block; two plugs are slidably connected in the seat groove; the two plugs are connected by the second spring; the middle part of the through rod passes through the seat groove, and the outer wall of the through rod is connected to the plug by the pull rope; the end of the plug away from the socket is provided with a hook; the inner wall of the plug groove is symmetrically provided with locking grooves; the hook of the plug can be engaged in the locking groove.

8. The remote sensing mapping equipment for 3D modeling of mountain photovoltaic power stations according to claim 7, characterized in that: The upper and lower inner walls of the seat groove are provided with auxiliary grooves, and an auxiliary block that is fixedly connected to the insert is slidably connected in the auxiliary groove.

9. A remote sensing mapping device for 3D modeling of mountain photovoltaic power stations according to claim 7, characterized in that: The locking groove has a transition groove at the end near the bottom of the insertion groove; the plug has an inclined guide angle at the end away from the socket.

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