Remote sensing surveying and mapping target device for surveying and mapping territorial resources

Abstract

The invention relates to the technical field of remote sensing surveying and mapping marks, in particular to a remote sensing surveying and mapping target device for land resource surveying and mapping. Comprising a base and an arc-shaped plate hinged to the edge of the lower surface of the base through a hinge block. The end part of the arc-shaped plate is vertically connected with a fan-shaped end cover; a cylindrical storage cavity is defined by the four arc-shaped plates, the four end covers and the lower surface of the base; the inner sides of every two adjacent arc-shaped plates are connected through a sub-target piece. The four sub-target sheets are combined into a whole target sheet after the four arc-shaped plates are unfolded; a fan-shaped groove is eccentrically formed in the base in a penetrating manner; a fan-shaped shielding groove communicated with the fan-shaped groove is formed in the base; according to the target device, the whole target sheet is adhered with the powdery pigment, and the color of the powdery pigment is the color which has the largest contrast with the surrounding environment, so that the whole target sheet in the target device is more prominent at the marked position, subsequent surveying and mapping are facilitated, the subsequent surveying and mapping precision is improved, and the situation of missing measurement is avoided.

Description

Technical Field

[0001] This invention relates to the field of remote sensing mapping marker technology, specifically a remote sensing mapping target device for land and resources surveying. Background Technology

[0002] Surveying and mapping encompasses two key aspects: measurement and mapping. It is based on computer technology, optoelectronic technology, network communication technology, space science, and information science, while relying on Global Navigation Satellite System (GNSS), Remote Sensing (RS), and Geographic Information System (GIS) as core technologies. By utilizing these advanced technologies, surveying and mapping can accurately select existing feature points and boundaries on the ground, and then, with the aid of professional measurement methods, obtain graphics, locations, and various related detailed information reflecting the current state of the ground. This information is of extremely high value, providing precise data support for engineering construction, ensuring the smooth progress of projects; providing comprehensive basic data for planning and design, making planning more scientific and rational; and providing important decision-making basis for administrative management, contributing to the orderly development of cities.

[0003] Aircraft-based aerial surveying, as an emerging low-altitude remote sensing image acquisition technology, is a powerful supplement to traditional satellite remote sensing and aerial photography. With its unique advantages, it can quickly and efficiently acquire high-resolution orthophotos of small areas and regions where aerial photography is difficult. In many fields of national economic development, such as urban planning, land resource management, and disaster monitoring and assessment, aircraft-based aerial surveying plays a crucial role and provides important technical support for promoting economic and social development.

[0004] In the entire process of aerial surveying, the deployment of image control points is a crucial step. The appropriateness of the target selection and the accuracy of the indicator points directly affect the accuracy of the measurement results. As the main carrier of image control points, the target is placed directly in the survey area and can be recovered on-site after the aerial surveying aircraft has completed its operation. It has the advantages of being low-carbon and environmentally friendly, and therefore has been widely used. The existing targets are of a single color, while land and resources surveying involves diverse environments. After the targets are placed, the colors of the surrounding environment are also diverse. For points with environmental colors similar to the target color, it will undoubtedly make identification difficult during the surveying process, and may even cause missed measurements, thus affecting the final remote sensing surveying results. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a remote sensing mapping target device for land and resources surveying. Because the entire target sheet is covered with powdered pigment, and the color of the powdered pigment is the color with the greatest contrast to the surrounding environment, the entire target sheet in the target device stands out more prominently at the marked position. This facilitates subsequent surveying and mapping, improves the accuracy of subsequent surveying and mapping, and avoids missed measurements.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A remote sensing mapping target device for land and resources surveying, comprising a base and an arc-shaped plate hinged to the lower surface edge of the base by a hinge block 21; a fan-shaped end cap is vertically connected to the end of the arc-shaped plate; four arc-shaped plates, four end caps, and the lower surface of the base enclose a cylindrical storage cavity; the inner sides of two adjacent arc-shaped plates are connected by target pieces; the four target pieces are combined into a whole target piece after the four arc-shaped plates are unfolded; and a fan-shaped groove is eccentrically provided through the base. The base has a fan-shaped shielding groove inside, which communicates with the fan-shaped slot; a fan-shaped shielding plate is movably connected inside the shielding groove; the shielding plate is fixed to the inner wall of the shielding groove by an arc-shaped first spring; a pusher groove is provided through the shielding groove to the outside; a pusher block fixed to the shielding plate is movably connected inside the pusher groove; a loading cylinder is rotatably and sealingly connected to the center of the upper surface of the base; fan-shaped loading cavities are evenly arranged around the center on the lower surface of the loading cylinder; multiple loading cavities are sequentially connected to the fan-shaped slot after the loading cylinder rotates; different colored powder pigments are filled into the multiple loading cavities.

[0007] Preferably, the entire loading cylinder is made of a transparent material.

[0008] Preferably, a rotating groove is rotatably connected to the center of the lower surface of the loading cylinder; a rotating block is rotatably connected within the rotating groove; the rotating block is fixedly connected to the center of the upper surface of the base; a central groove is provided at the center of the upper surface of the base; a central rod is rotatably connected within the central groove; an arc-shaped protrusion is fixedly connected to the upper surface of the central rod; a sliding groove is provided vertically through the rotating block; a sliding plate is slidably connected to the sliding groove; the sliding plate can move upward under the pressure of the arc-shaped protrusion; the central groove communicates with the shielding groove; and the central rod is fixedly connected to the shielding plate.

[0009] Preferably, the bottom of the rotating groove is provided with a plurality of slots evenly arranged around the center; the strip-shaped slots pass through the center of the rotating groove and can be inserted into the slide plate; the center rod is embedded with a magnet, which can attract the slide plate made of magnetic material.

[0010] Preferably, the sub-target sheet is made of a flexible material; the inner surface of the sub-target sheet is smooth; and the outer surface of the sub-target sheet is rough.

[0011] Preferably, the upper iron block is fixedly connected to one end of the target sheet near the base; the upper iron block can be magnetically attracted by the magnet inside the central rod; the distance from the upper iron block on the unfolded target sheet to the two adjacent arc plates is equal.

[0012] Preferably, the lower magnetic ball is fixedly connected to the end of the target sheet away from the base; the distance from the lower magnetic ball on the unfolded target sheet to the two adjacent arc plates is equal; the four lower magnetic balls can be attracted together.

[0013] Preferably, the hinge block 21 is hinged to the base via a torsion spring; the four arc-shaped plates unfold to form a cross-shaped structure under the action of the torsion spring; one side of the end cap is provided with an L-shaped first locking groove; the other side of the end cap is provided with an L-shaped second locking groove; the first locking groove is downward through; an L-shaped locking block is slidably connected in the first locking groove; the lower end of the locking block protrudes from the lower end of the first locking groove; the locking block is connected to the inner wall of the first locking groove via a second spring; a barb is provided at the end of the locking block; a guide surface is inclinedly provided on the barb; the locking block on one of the end caps can drive the barb to engage in the second locking groove on the adjacent end cap; the lower surface of the base protrudes downward at its center.

[0014] Preferably, the edges of the four end caps, after being merged, protrude downwards and extend beyond the lower end of the locking block.

[0015] Preferably, the arc-shaped plate has a rotating hole at the end away from the hinge block 21; a rotating rod is rotatably connected in the rotating hole; and the rotating rod is fixedly connected to the end cap.

[0016] The beneficial effects of this invention are as follows: 1. In this invention, because the target sheet is covered with powdered pigment, and the color of the powdered pigment is the color with the greatest contrast to the surrounding environment, the target sheet in the target device is more prominent at the marked position, which facilitates subsequent mapping, improves the accuracy of subsequent mapping, and avoids missed measurements.

[0017] 2. In this invention, after the baffle plate blocks the fan-shaped groove, the sliding plate will press against the bottom wall of the rotating groove and lock the loading chamber through static friction. This avoids the rotation of the loading cylinder during the shaking of the target device. During the rotation of the loading cylinder, the pigments in multiple loading cylinders will sequentially connect with and mix with the fan-shaped groove, causing pigment contamination.

[0018] 3. In this invention, the inner surface of the target plate is in contact with the ground and is blocked by the outer surface, so that the inner surface of the target plate does not play a marking role. Therefore, during the process of the pigment in the storage cavity and the target plate in the storage cavity shaking and mixing, the inner surface of the target plate is set as a smooth surface, so it is difficult for the pigment to adhere and avoids the waste of pigment. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a perspective view of the invention in its folded state; Figure 2 This is a perspective view of the invention in its unfolded state; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 yes Figure 2 Enlarged view at point B in the middle; Figure 5 This is a diagram showing the connection position between the inner side of the arc-shaped plate and the target sheet in this invention; Figure 6 yes Figure 5 Enlarged view of point C in the middle; Figure 7 yes Figure 1 A sectional view; Figure 8 yes Figure 7 Enlarged view of point D in the middle; Figure 9 This is a schematic diagram of the distribution of multiple sub-target pieces in this invention; Figure 10 This is a perspective view of the loading cylinder in this invention; Figure 11 This is a perspective view of the transfer block in this invention; Figure 12 This is a perspective view of the base in this invention; Figure 13 This is a cross-sectional view of the shielding groove in this invention; Figure 14 This is a perspective view of the shielding plate in this invention; Figure 15 This is a perspective view of the arc-shaped plate in this invention; Figure 16 This is a schematic diagram of the locking of the locking block and the second locking groove in this invention.

[0021] In the diagram: Base 1, Fan-shaped groove 11, Blocking groove 12, Blocking plate 13, First spring 14, Dial groove 15, Dial block 16, Center groove 17, Arc plate 2, Hinge block 21, Whole target piece 22, Divided target piece 221, Upper iron block 23, Lower magnetic ball 24, Torsion spring 25, Rotating hole 26, Rotating rod 27, End cap 3, First locking groove 31, Second locking groove 32, Locking block 33, Second spring 34, Barb 35, Guide surface 351, Loading cylinder 4, Loading cavity 41, Rotating groove 42, Rotating block 43, Sliding groove 44, Slide plate 45, Slot 46, Center rod 5, Arc-shaped protrusion 51, Magnet 52. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 16 As shown, the present invention includes the following embodiments: Example 1: A remote sensing mapping target device for land and resources surveying includes a base 1 and an arc-shaped plate 2 hinged to the lower edge of the base 1 via a hinge block 21; the ends of the arc-shaped plate 2 are vertically connected to fan-shaped end caps 3; four arc-shaped plates 2, four end caps 3, and the lower surface of the base 1 enclose a cylindrical storage cavity; the inner sides of two adjacent arc-shaped plates 2 are connected by target segments 221; the four target segments 221 are combined into a whole target segment 22 after the four arc-shaped plates 2 are unfolded; the base 1 is eccentrically provided with a fan-shaped groove 11; the base 1 has a cavity communicating with the fan-shaped groove 11. A fan-shaped shielding groove 12; a fan-shaped shielding plate 13 is movably connected inside the shielding groove 12; the shielding plate 13 is fixedly connected to the inner wall of the shielding groove 12 by an arc-shaped first spring 14; a through groove 15 is provided through the shielding groove 12; a lever block 16 fixedly connected to the shielding plate 13 is movably connected inside the through groove 15; a loading cylinder 4 is rotatably and sealingly connected to the center of the upper surface of the base 1; a fan-shaped loading cavity 41 is evenly arranged around the center on the lower surface of the loading cylinder 4; multiple loading cavities 41 are sequentially connected to the fan-shaped groove 11 after the loading cylinder 4 rotates; different colored powder pigments are filled into the multiple loading cavities 41.

[0024] In this embodiment, the entire loading cylinder 4 is made of transparent material.

[0025] In the initial state, the four arc-shaped plates 2 and the four end caps 3 are joined together to form a sealed storage cavity. Sealing elements (not shown in the figure) are provided at the contact points between the arc-shaped plates 2 and between the arc-shaped plates 2 and the base 1. Sealing elements (not shown in the figure) are also provided at the contact points of the four end caps 3. This ensures the sealing effect of the storage cavity after the arc-shaped plates 2 and end caps 3 are joined. If it is necessary to use a target device to mark the points, the surrounding environment of the point will be observed first. After selecting the most contrasting and conspicuous color in the filling cylinder 4, the target device will be inverted so that the opening of the filling cavity 41 faces upwards, allowing the powdered pigment remaining in the shielding groove 12 to return to the corresponding filling cavity 41. Then, the target device will be rotated... The feeding cylinder 4 is made entirely of transparent material, allowing the operator to observe the color of the powdered pigment inside the feeding chamber 41. The operator aligns the feeding chamber 41 containing the required powdered pigment with the sector groove 11, then moves the lever 16 along the lever 15. During this movement, the lever 16 causes the baffle plate 13 to move within the baffle groove 12, compressing the first spring 14. After being moved, the baffle plate 13 moves away from the sector groove 11, opening it. This connects the storage chamber to the corresponding feeding chamber 41 via the sector groove 11. Finally, the target device is placed upright, opening the feeding chamber 41. With the nozzle facing down, shake the target device. The powdered pigment of the corresponding color in the loading chamber 41 will pass through the opened fan-shaped groove 11 and enter the storage chamber under the influence of gravity and shaking. Then, release the lever, and the first spring 14 will push the baffle 13 to move within the baffle groove 12, which will block the fan-shaped groove 11. Next, shake the target device back and forth. The powdered pigment inside the storage chamber of the target device will come into contact with the four target pieces 221. After the target pieces 221 adhere to the powdered pigment, they will show the same color as the powdered pigment. Then, invert the target device again, move the lever 16 to open the fan-shaped groove 11, and tap the target device with your hand to allow the excess powdered pigment in the storage chamber to flow into the loading chamber along the fan-shaped groove 11. 41. Finally, close the fan-shaped slot 11, place the target device upright, and pry open the four arc-shaped plates 2. The four end caps 3 will separate as the four arc-shaped plates 2 are pried open, opening the storage cavity and exposing the four sub-target pieces 221 inside the storage cavity. After the four arc-shaped plates 2 unfold into a cross shape, the four sub-target pieces 221 unfold to form a complete whole target piece 22. Finally, place the target device at the point to be marked. Since the whole target piece 22 is covered with powdered pigment, and the color of the powdered pigment is the color with the greatest contrast to the surrounding environment, the whole target piece 22 in the target device stands out more at the marked position, which facilitates subsequent mapping and improves the accuracy of subsequent mapping, avoiding missed measurements.After the survey is completed, the loading cylinder 4 is lifted, and then the powdered pigment on the target plate 221 is knocked off. Finally, the four arc-shaped plates 2 are flipped inward, and the four end caps 3 move along with the corresponding arc-shaped plates 2. After the four end caps 3 contact each other, the target plate 221 is loosely folded into the storage cavity, which protects the folded target plate 221. As the powdered pigment in the loading cavity 41 is consumed, the operator replenishes the powdered pigment (hereinafter referred to as pigment) in the loading cavity 41 through the loading cylinder 4. Specifically, the loading cylinder 4 is aligned with the fan-shaped groove 11, the fan-shaped groove 11 is opened, the arc-shaped plate 2 is opened, and the pigment is poured into the loading cavity 41.

[0026] Example 2: A rotating groove 42 is rotatably connected to the center of the lower surface of the loading cylinder 4; a rotating block 43 is rotatably connected inside the rotating groove 42; the rotating block 43 is fixedly connected to the center of the upper surface of the base 1; a central groove 17 is provided at the center of the upper surface of the base 1; a central rod 5 is rotatably connected inside the central groove 17; an arc-shaped protrusion 51 is fixedly connected to the upper surface of the central rod 5; a sliding groove 44 is provided vertically through the rotating block 43; a sliding plate 45 is slidably connected to the sliding groove 44; the sliding plate 45 can move upward under the pressure of the arc-shaped protrusion 51; the central groove 17 is connected to the shielding groove 12; the central rod 5 is fixedly connected to the shielding plate 13.

[0027] In this embodiment, the bottom of the rotating groove 42 is evenly provided with a plurality of slots 46 around the center; the strip-shaped slots 46 pass through the center of the rotating groove 42 and can be inserted into the slide plate 45; the center rod 5 is embedded with a magnet 52, which can attract the slide plate 45 made of magnetic material.

[0028] First, the target device is inverted, meaning the opening of the loading chamber 41 faces upwards. Then, as the lever 16 is moved, it drives the baffle 13 to move along the baffle groove 12. After moving, the baffle 13 moves away from the fan-shaped groove 11, opening the fan-shaped groove 11. During the movement of the baffle 13, the center rod 5 rotates. During the rotation of the center rod 5, the arc-shaped protrusion 51 and the sliding plate 45 are misaligned. The sliding plate 45 moves away from the arc-shaped protrusion. The sliding plate 45 is on the center rod 5. Under the attraction of the internal magnet 52, the slide 45 slides along the groove 44 until the slide plate 45 is pressed against the end face of the center rod 5. After the slide plate 45 moves away from the bottom of the rotating groove 42, the loading cylinder 4 is unlocked, allowing the loading cylinder 4 to rotate freely. After the loading cylinder 4 drives the corresponding loading cavity 41 to align with the fan-shaped groove 11, the target device is placed upright, that is, the opening of the loading cavity 41 faces downward. The pigment in the loading cavity 41 enters the storage cavity. Release the lever 16, and the first spring 14 will push the baffle 13 along the baffle. When the baffle 12 moves, the baffle 13 drives the central rod 5 to rotate. During the rotation of the central rod 5, the arc-shaped protrusion 51 rotates synchronously. The ends of the arc-shaped protrusion 51 all have guiding arc-shaped structures. Thus, during the rotation of the arc-shaped protrusion 51, it will squeeze the sliding plate 45 to slide along the slide groove 44. The sliding plate 45 will overcome the magnetic force and move away from the central rod 5. After the baffle 13 blocks the fan-shaped groove 11, the sliding plate 45 will abut against the bottom wall of the rotating groove 42, and lock the loading cavity 41 through static friction. This design prevents the loading cylinder 4 from rotating during the shaking of the target device. Rotation of the loading cylinder 4 would cause the pigments in multiple loading cylinders 4 to connect and mix with the fan-shaped groove 11 in sequence, resulting in pigment contamination. Furthermore, the bottom of the rotating groove 42 is provided with multiple slots 46. After the sliding plate 45 is inserted into the slots 46 at the bottom of the rotating groove 42, the loading cylinder 4 can be further locked, improving the locking effect. After the sliding plate 45 is removed from the slots 46, the loading cylinder 4 is unlocked.

[0029] Example 3: The target sheet 221 is made of flexible material; the inner surface of the target sheet 221 is smooth; the outer surface of the target sheet 221 is rough.

[0030] The inner surface of the target plate 221 is in contact with the ground and is blocked by the outer surface, so the inner surface of the target plate 221 does not serve a marking function. Therefore, during the shaking and mixing process between the pigment in the storage cavity and the target plate 221 in the storage cavity, the inner surface of the target plate 221 is set to a smooth surface, so it is difficult for the pigment to adhere, thus avoiding the waste of pigment adhesion. The outer surface of the target plate 221 is rough, which can adhere the pigment. The target plate 221 after the pigment adheres will display the corresponding color. After the mapping is completed, the arc plate 2 is kept open, and the powdery pigment can be discharged from the target plate 221 and fall to the ground by tapping. If the pigment on the rough surface of the target plate 221 is relatively clean, the arc plate 2 is retracted, the fan-shaped groove 11 is opened, and the pigment is vigorously shaken to allow the pigment to pass through the opened fan-shaped groove 11 and be collected into the corresponding loading cavity 41.

[0031] Example 4: The upper iron block 23 is fixedly connected to one end of the target plate 221 near the base 1; the upper iron block 23 can be magnetically attracted by the magnet 52 in the central rod 5; the distance from the upper iron block 23 on the unfolded target plate 221 to the two adjacent arc plates 2 is equal.

[0032] In this embodiment, the lower magnetic ball 24 is fixedly connected to the end of the target plate 221 away from the base 1; the distance from the lower magnetic ball 24 on the unfolded target plate 221 to the two adjacent arc plates 2 is equal; the four lower magnetic balls 24 can be attracted together.

[0033] The central rod 5 is located at the center of the base 1. Therefore, after the target sheet 221 is stored in the storage cavity, the upper iron block 23 on the end of the target sheet 221 near the base 1 is attracted by the magnetic force of the central rod 5 and moves closer to the center of the lower surface of the base 1. This causes the inner surface of the target sheet 221 to shrink and the outer surface to be exposed. This allows the pigment to quickly and fully contact the outer surface of the target sheet 221 after flowing out from the fan-shaped groove 11. Furthermore, the lower magnetic balls 24 on the four target sheets 221 are attracted together under the action of magnetic force. This further shrinks the inner surface of the target sheet 221 and further exposes the outer surface of the target sheet 221. This allows the rough surface on the target sheet 221 to have more full contact with the pigment, improving the clarity of the marking and the efficiency of the marking.

[0034] Example 5: The hinge block 21 is hinged to the base 1 via a torsion spring 25; the four arc-shaped plates 2 unfold to form a cross-shaped structure under the action of the torsion spring 25; one side of the end cap 3 is provided with an L-shaped first locking groove 31; the other side of the end cap 3 is provided with an L-shaped second locking groove 32; the first locking groove 31 extends downwards; an L-shaped locking block 33 is slidably connected in the first locking groove 31; the lower end of the locking block 33 protrudes from the lower end of the first locking groove 31; the locking block 33 is connected to the inner wall of the first locking groove 31 via a second spring 34; a barb 35 is provided at the end of the locking block 33; a guide surface 351 is inclinedly provided on the barb 35; the locking block 33 on one of the end caps 3 can drive the barb 35 to engage in the second locking groove 32 on the adjacent end cap 3; the lower surface of the base 1 protrudes downwards from the center.

[0035] In this embodiment, the edges of the four end caps 3 after being merged protrude downwards and extend beyond the lower end of the locking block 33.

[0036] After the four arc-shaped plates 2 are joined together against the torsion spring 25, the four end caps 3 will also be joined together. The first locking groove 31 and the second locking groove 32 on two adjacent end caps 3 are aligned. When the guide surface 351 on the barb 35 at the end of the locking block 33 enters the corresponding second locking groove 32, the guide surface 351 is squeezed by the opening of the second locking groove 32, which causes the barb 35 to drive the locking block 33 to slide along the first locking groove 31 and overcome the elastic force of the second spring 34. In this way, the barb 35 can be smoothly aligned with the opening of the second locking groove 32. After the barb 35 enters the second locking groove 32 with the end of the locking block 33, the second spring 34 pushes the locking block 33 to slide in the first locking groove 31. The locking block 33 will drive the barb 35 at the end to hook the second locking groove 32, realizing the locking of the two adjacent end caps 3. Furthermore, since the edges of the four end caps 3 protrude downwards and extend beyond the lower end of the locking block 33 after being merged, the locking block 33 is not easily touched under the protection of the protruding edges of the four end caps 3, making the locking of the two adjacent end caps 3 more stable. When it is necessary to unlock the end caps 3, the four locking blocks 33 need to be pressed at the same time. The locking blocks 33 will slide along the first locking groove 31 and overcome the elastic force of the second spring 34. The locking blocks 33 will drive the barb 35 at the end to move in the second locking groove 32, releasing the barb 35 from locking the second locking groove 32. Then, the torsion spring 25 drives the connecting block to flip outwards, and the hinge block 21 drives the arc plate 2 to flip outwards, so that the four arc plates 2 unfold under the action of the torsion spring 25 to form a cross-shaped structure, making the target device more stable during placement.

[0037] Example 6: The arc plate 2 is provided with a rotating hole 26 at the end away from the hinge block 21; a rotating rod 27 is rotatably connected in the rotating hole 26; the rotating rod 27 is fixedly connected to the end cap 3.

[0038] After the four arc-shaped plates 2 unfold to form a cross-shaped structure, if the ground is soft, the tips of the four end caps 3 are directly inserted into the ground. After the four end caps 3 are inserted into the ground, the four arc-shaped plates 2 become more stable, making the entire target device more stable. If the ground is hard, the four end caps 3 are controlled to rotate around the corresponding rotating rod 27. The rotating rod 27 will rotate within the rotating hole 26. After the end cap 3 rotates 180 degrees, the tip of the end cap 3 will not face the ground, so that the tip of the end cap 3 will not affect the placement of the target device. In this way, the target device can adapt to both hard and soft ground.

[0039] 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 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, 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 the description and should not be construed as indicating or implying relative importance.

[0040] 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 target device for land and resources surveying, characterized in that: The system includes a base and an arc-shaped plate hinged to the lower edge of the base via a hinge block; the ends of the arc-shaped plates are vertically connected to fan-shaped end caps; four arc-shaped plates, four end caps, and the lower surface of the base enclose a cylindrical storage cavity; the inner sides of two adjacent arc-shaped plates are connected by target plates; the four target plates combine to form a whole target plate after the four arc-shaped plates are unfolded; the base has an eccentrically penetrating fan-shaped groove; the base has a fan-shaped shielding groove communicating with the fan-shaped groove; the... A fan-shaped shielding plate is movably connected within the shielding groove; the shielding plate is fixedly connected to the inner wall of the shielding groove via an arc-shaped first spring; a through groove is provided through the shielding groove; a lever block fixedly connected to the shielding plate is movably connected within the through groove; a loading cylinder is rotatably and sealingly connected to the center of the upper surface of the base; fan-shaped loading cavities are evenly arranged around the center on the lower surface of the loading cylinder; multiple loading cavities are sequentially connected to the fan-shaped grooves as the loading cylinder rotates; different colored powder pigments are filled into the multiple loading cavities.

2. The remote sensing mapping target device for land and resources surveying according to claim 1, characterized in that: The entire loading cylinder is made of transparent material.

3. The remote sensing mapping target device for land and resources surveying according to claim 1, characterized in that: A rotating groove is rotatably connected to the center of the lower surface of the loading cylinder; a rotating block is rotatably connected within the rotating groove; the rotating block is fixedly connected to the center of the upper surface of the base; a central groove is provided at the center of the upper surface of the base; a central rod is rotatably connected within the central groove; an arc-shaped protrusion is fixedly connected to the upper surface of the central rod; a sliding groove is provided vertically through the rotating block; a sliding plate is slidably connected to the sliding groove; the sliding plate can move upward under the pressure of the arc-shaped protrusion; the central groove communicates with the shielding groove; and the central rod is fixedly connected to the shielding plate.

4. A remote sensing mapping target device for land and resources surveying according to claim 3, characterized in that: The bottom of the rotating groove is evenly provided with multiple slots around the center; the strip-shaped slots pass through the center of the rotating groove and can be inserted into the slide plate; the center rod is embedded with a magnet, which can attract the slide plate made of magnetic material.

5. A remote sensing mapping target device for land and resources surveying according to claim 3, characterized in that: The target sheet is made of flexible material; the inner surface of the target sheet is smooth; and the outer surface of the target sheet is rough.

6. A remote sensing mapping target device for land and resources surveying according to claim 5, characterized in that: The upper iron block is fixed to one end of the target plate near the base; the upper iron block can be magnetically attracted by the magnet inside the central rod; the distance from the upper iron block on the unfolded target plate to the two adjacent arc plates is equal.

7. A remote sensing mapping target device for land and resources surveying according to claim 6, characterized in that: The lower magnetic ball is fixed to one end of the target plate away from the base; the distance from the lower magnetic ball on the unfolded target plate to the two adjacent arc plates is equal; the four lower magnetic balls can be attracted together.

8. A remote sensing mapping target device for land and resources surveying according to claim 1, characterized in that: The hinge block is hinged to the base via a torsion spring; the four arc-shaped plates unfold to form a cross-shaped structure under the action of the torsion spring; one side of the end cap is provided with an L-shaped first locking groove; the other side of the end cap is provided with an L-shaped second locking groove; the first locking groove is downward through; an L-shaped locking block is slidably connected in the first locking groove; the lower end of the locking block protrudes from the lower end of the first locking groove; the locking block is connected to the inner wall of the first locking groove via a second spring; a barb is provided at the end of the locking block; a guide surface is inclined on the barb; the locking block on one of the end caps can drive the barb to engage in the second locking groove on the adjacent end cap; the lower surface of the base protrudes downward from the center.

9. A remote sensing mapping target device for land and resources surveying according to claim 8, characterized in that: The edges of the four end caps, after being joined together, protrude downwards and extend beyond the lower end of the locking block.

10. A remote sensing mapping target device for land and resources surveying according to claim 1, characterized in that: The arc-shaped plate has a rotating hole at the end away from the hinge block; a rotating rod is rotatably connected in the rotating hole; the rotating rod is fixedly connected to the end cap.

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