Auxiliary tool for vertical aerial photogrammetry control point marking

Abstract

The utility model relates to aerial photogrammetry image control point marking technical field, concretely relates to a kind of vertical aerial photogrammetry image control point marking is used auxiliary tool, including vertical pole and marking disc, marking disc upper surface is equipped with mark drawing, vertical pole is fixedly connected with the center of the lower surface of marking disc at one end close to marking disc, the center of mark drawing is top measuring point, the center of mark drawing coincides with the center of marking disc upper surface, vertical pole is perpendicular to the lower surface of marking disc, the end of vertical pole away from marking disc is perpendicular to bottom surface, the outside of vertical pole is fixedly connected with level gauge, vertical pole outside is equipped with color column.The utility model can make marking disc higher than crowd surface by the color column of vertical pole outside and the color band of base upper surface, cooperate with the length of vertical pole, level gauge ensures that vertical pole is vertical, marking disc and line of sight angle are judged by observing color column or color band leakage, and then the coordinate of correction mark point is calculated.

Description

Technical Field

[0001] This utility model relates to the field of aerial photogrammetry control point marking technology, specifically an auxiliary tool for vertical aerial photogrammetry control point marking. Background Technology

[0002] In the field of aerial photogrammetry, control point markers are used by aerial photography equipment to capture coordinates to calibrate image data. Especially in densely populated public areas such as shopping malls and large complexes, aerial photogrammetry work needs to be carried out both indoors and outdoors to obtain integrated indoor and outdoor geographic image data. Currently, the industry mostly uses planar marker boards or simple column markers as control points. Planar marker boards are laid directly on the ground, while simple column markers are mostly a single pole with a marker block on top.

[0003] However, when using existing marking methods in densely populated areas such as shopping malls, flat marking boards are easily stepped on and moved by pedestrians, and the marking blocks of simple column-type markings are at a certain height from the bottom measurement point, making it difficult for aerial photography equipment to accurately capture the coordinates of the control points and affecting the accuracy of subsequent data processing.

[0004] Therefore, an auxiliary tool for marking control points in vertical aerial photogrammetry is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an auxiliary tool for marking control points in vertical aerial photogrammetry. Through the color bars on the outer side of the pole and the color strips on the upper surface of the base, it has eye-catching features that allow it to be clearly displayed in crowded places such as shopping malls, preventing it from being trampled by pedestrians. Marking points can be deployed in crowded areas. Furthermore, by adjusting the length of the pole, the marking disc can be raised above the surface of the crowd. A leveling device ensures the pole is vertical. By observing the protrusion of the color bars or strips, the angle between the marking disc and the line of sight can be determined, and the coordinates of the marking points can be calculated and corrected. This solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a pole and a marking disk, the upper surface of the marking disk is provided with a marking pattern, one end of the pole near the marking disk is fixedly connected to the center of the lower surface of the marking disk, the center of the marking pattern is the top measurement point, and the center of the marking pattern coincides with the center of the upper surface of the marking disk; The upright is perpendicular to the lower surface of the marking disk, and the end of the upright away from the marking disk is perpendicular to the bottom surface. A leveling device is fixedly connected to the outer side of the upright. The outer side of the upright is provided with colored columns, the position and length of which are related to the diameter of the marking disk.

[0007] Preferably, the end of the upright rod away from the marking disk is provided with a base, and the center of the upper surface of the base is provided with a groove, which is the bottom measuring point, and the end of the upright rod away from the marking disk is inserted into the groove.

[0008] Preferably, the upper surface of the base is provided with a colored band, the colored band is related to the diameter of the marking disk and the length of the upright, the diameter of the base is equal to the diameter of the marking disk, and a marking ring is provided along the edge line on the outer side of the upper surface of the marking disk, the marking ring, the colored band and the colored column are all eye-catching colors.

[0009] Preferably, a slip ring is fitted on the outer side of the upright, and multiple support rods are hinged to the outer side of the slip ring, with an adjustment component connected to the other end of each support rod.

[0010] Preferably, the adjustment assembly includes a first slider, a second slider, an adjustment screw, a latch, and a slide groove. The first slider is hinged to the support rod, and the slide groove is fixedly connected to the upper surface of the base.

[0011] Preferably, both slider one and slider two are slidably connected to the slide groove, one end of the adjusting screw is inserted into the slide groove and threadedly connected to the slide groove, and the end of the adjusting screw inserted into the slide groove is rotatably connected to slider two.

[0012] Preferably, both the upper surfaces of the first slider and the second slider are provided with slots, and the latch is U-shaped, with its two ends inserted into the two slots respectively.

[0013] Preferably, the bottom surface of the base is provided with an anti-slip pad, and the upper surface of the base is provided with a plurality of auxiliary fixing holes, which are used to assist in fixing the base with bolts when the base is not placed stably.

[0014] Compared with the prior art, this utility model provides an auxiliary tool for marking control points in vertical aerial photogrammetry, which has the following advantages: 1. The colored pillars on the outer side of the pole and the colored strips on the upper surface of the base have eye-catching features and can be clearly displayed in crowded places such as shopping malls, avoiding being trampled by pedestrians. Marking points can be set up in crowded places, and the length of the pole can be adjusted so that the marking plate is higher than the surface of the crowd.

[0015] 2. The leveling instrument ensures the pole is vertical. By observing the protrusion of the color bar or color band, the angle between the marker disk and the line of sight is determined, and then the coordinates of the marker point are calculated and corrected. Compared with directly setting the marker point through the pole, this improves the accuracy of subsequent data processing and meets the requirements of the accuracy of the image control point coordinates in aerial photogrammetry in densely populated areas. 3. The base, support, uprights, and marking disc are designed as detachable structures. During installation, the base can be placed at the target location first. The coordinates of the bottom measurement point at the groove of the base can be accurately measured in the early stage of installation. Then, the support, uprights, and marking disc are installed. This prevents interference with the bottom measurement point during installation and ensures more accurate measurement of the bottom measurement point coordinates. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the isometric structure of the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model. Figure 2 A schematic diagram of the upper surface structure of the marking disk provided by the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model; Figure 3 A schematic diagram of the lower half of the equipment provided by the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model; Figure 4 A schematic diagram of the adjustment component structure provided by the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model; Figure 5 A schematic diagram of the base structure provided for the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model; Figure 6 A schematic diagram showing the relationship between the line-of-sight angle and the position of the color bar 6 and the color band 9 provided by the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model; Figure 7 This diagram illustrates the offset distance between the observation point and the actual measurement point provided by the auxiliary tool for marking control points in vertical aerial photogrammetry according to this utility model.

[0017] In the diagram: 1. Upright pole; 2. Marking disc; 3. Marking diagram; 4. Top measuring point; 5. Leveling instrument; 6. Color column; 7. Base; 8. Groove; 9. Color strip; 10. Marking ring; 11. Slip ring; 12. Support rod; 13. Adjustment component; 14. Slot; 15. Anti-slip pad; 16. Auxiliary fixing hole; 1301. Slider one; 1302. Slider two; 1303. Adjusting screw; 1304. Lock; 1305. Slide groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Please see Figure 1 - Figure 7 This embodiment provides an auxiliary tool for marking control points in vertical aerial photogrammetry, including a pole 1 and a marking disk 2. The upper surface of the marking disk 2 is provided with markings. Figure 3 The end of the upright post 1 closest to the marking disk 2 is fixedly connected to the center of the lower surface of the marking disk 2, marking... Figure 3 The center is the top measurement point 4, marked. Figure 3 The center of the mark coincides with the center of the upper surface of the mark disk 2, wherein the mark on the mark disk 2 Figure 3 It can provide a top reference for aerial photogrammetry. The pole 1 is fixed to the center of the lower surface of the marking disk 2 and marked. Figure 3 The center coincides with the center of the marking disk 2, ensuring that the top measuring point 4 is aligned with the axis of the upright 1. The upright 1 is perpendicular to the lower surface of the marking disk 2, and the end of the upright 1 away from the marking disk 2 is perpendicular to the horizontal plane. A leveling instrument 5 is fixedly connected to the outer side of the upright 1. The leveling instrument 5 can indicate the vertical status of the upright 1 in real time. By observing the leveling instrument 5, the upright 1 is made perpendicular to the horizontal plane, avoiding measurement deviation caused by the tilt of the upright 1. The leveling instrument 5 is an existing device and will not be described in detail here.

[0020] The outer side of the upright 1 is provided with a color column 6. The position and length of the color column 6 are related to the diameter of the marking disk 2. The color column 6 uses a bright color (which can be red, white or yellow), and the color of the other surfaces of the upright 1 has a strong contrast with the color of the color column 6 (e.g., when the color column 6 is yellow, the upright 1 is black, and when the color column 6 is red, the upright 1 is white), making the position of the color column 6 easier to observe. At the same time, the position and length of the color column 6 are related to the diameter of the marking disk 2, which can be used as a basis for judging the angle between the marking disk 2 and the line of sight.

[0021] Please see Figure 1 - Figure 5A base 7 is provided at the end of the upright 1 away from the marking disk 2. A groove 8 is provided at the center of the upper surface of the base 7. The groove 8 is the bottom measurement point. The end of the upright 1 away from the marking disk 2 is inserted into the groove 8. The groove 8, as the bottom measurement point, facilitates the initial setting of measurement coordinates and avoids interference with the measurement point during subsequent installation. A color band 9 is provided on the upper surface of the base 7. The color band 9 is related to the diameter of the marking disk 2 and the length of the upright 1. The diameter of the base 7 is equal to the diameter of the marking disk 2. A marking ring 10 is provided along the edge line on the outer side of the upper surface of the marking disk 2. The marking ring 10, the color band 9, and the color column 6 are all conspicuous colors. The color band 9 and the color column 6 are the same color, while the marking ring 10 and the color band 9 are different colors. The other surfaces of the base 7 are also in strong contrast to the color column 6. The color band 9 can help determine the included angle when the upright 1 is completely blocked by the marking disk 2. The color of the marking ring 10 is different from that of the color band 9 and the color column 6, making it easy to observe the position of the color column 6 corresponding to the marking ring 10.

[0022] Please see Figure 3 - Figure 5 A slip ring 11 is fitted on the outer side of the upright 1. Multiple support rods 12 are hinged to the outer side of the slip ring 11. The other end of the support rods 12 is connected to an adjustment assembly 13. The bracket structure formed by the slip ring 11 and the support rods 12 can realize the detachable connection between the upright 1 and the base 7, which is convenient for step-by-step installation. The adjustment assembly 13 includes a slider 1301, a slider 2 1302, an adjusting screw 1303, a lock 1304, and a sliding groove 1305. The slider 1301 is hinged to the support rod 12, and the sliding groove 1305 is fixedly connected to the upper surface of the base 7. The slider 1301 and slider 2 1302 are hinged to the support rod 12. All 302 are slidably connected to the slide groove 1305. One end of the adjusting screw 1303 is inserted into the slide groove 1305 and threadedly connected to the slide groove 1305. The end of the adjusting screw 1303 inserted into the slide groove 1305 is rotatably connected to the second slider 1302. The upper surfaces of both the first slider 1301 and the second slider 1302 are provided with slots 14. The latch 1304 is U-shaped and its two ends are respectively inserted into the two slots 14. The adjusting component 13 can adjust the angle of the support rod 12 by sliding the slider, adjusting the screw, and fixing the latch 1304, thereby achieving the leveling of the upright 1.

[0023] Please see Figure 1 , Figure 3 as well as Figure 4 The base 7 has an anti-slip pad 15 on its bottom surface and multiple auxiliary fixing holes 16 on its upper surface. The auxiliary fixing holes 16 are used to fix the base 7 with bolts when it is unstable. The anti-slip pad 15 can increase the friction between the base 7 and the ground, preventing the tool from shifting due to collisions with people in crowded areas such as shopping malls. The auxiliary fixing holes 16 can further reinforce the base 7 when the friction with the ground is insufficient, ensuring stable installation. At the same time, the width of the adjacent two sides of the support rod 12 is smaller than the diameter of the upright 1, so the support rod 12 cannot completely block the color column 6, ensuring that the color column 6 can be observed.

[0024] When deployed in crowded places such as shopping malls, the eye-catching colored columns 6, colored strips 9, and marking rings 10 can prevent the tools from being trampled by pedestrians. The upright pole 1 is of a fixed length after production, and the upright pole 1 can make the marking plate 2 higher than the surface of the crowd, which is convenient for aerial photography observation. The leveling instrument 5 ensures that the upright pole 1 is vertical. By observing the number and position of the exposed colored columns 6 or colored strips 9, and combining the fixed length of the upright pole 1, the offset distance between the top measurement point 4 and the bottom measurement point on the photo can be calculated, and then the coordinates of the marking point can be corrected. Compared with directly setting the marking points through the upright pole, the accuracy of subsequent data processing is improved.

[0025] When the pole 1 is vertical, when viewed from above, part of the pole 1 is blocked by the marking disk 2. The surface of the pole 1 has multiple colored columns 6. If the line of sight is at the lower end of the colored column 6, it is angle one; if the line of sight is at the upper end of the colored column 6, it is angle two; if the line of sight is in the middle of the colored column 6, it is between angle one and two. At this time, the angle needs to be estimated. If a higher accuracy measurement is required, more colored columns 6 are needed on the surface of the pole 1, while reducing the length of each individual colored column 6. If the pole 1 is completely blocked by the marking disk 2, the colored band 9 of the base 7 can be observed. However, if the tilt angle of the base 7 is large or the accuracy requirement is high, only colored columns 6 are used.

[0026] The separate structure of the base 7, support parts (slip ring 11, support rod 12, adjustment component 13) from the upright 1 and marking plate 2 allows the base 7 to be set up separately and the coordinates of the bottom measuring point to be measured before installing other components. This prevents interference with the bottom measuring point during the setup process and ensures more accurate coordinate measurement. In practical applications, if the surface to be laid is flat, the above steps can be followed directly. If the surface to be laid is uneven, there will be a deviation between the top measuring point 4 and the bottom measuring point. If the angle of inclination of the surface to be laid is small, the deviation can be ignored. If the angle of inclination of the surface to be laid is too large, pads (such as cardboard or wooden boards) can be added under the base 7 to adjust it. At the same time, after the product is manufactured, the length of the upright 1 and the diameter of the marking plate 2 are fixed values. When the upright 1 is vertical, when viewed from above, part of the upright 1 will be blocked by the marking plate 2. The included angle can be judged by the color column 6 or the color strip 9. The working principle of the above embodiment is as follows: the anti-slip pad 15 on the bottom surface of the base 7 increases the friction with the ground, the auxiliary fixing hole 16 fixes the position of the base 7 with bolts when the base 7 is unstable, the sliding groove 1305 on the base 7 is slidably connected with the slider 1301 and slider 2 1302 of the adjustment component 13, the latch 1304 is inserted into the slot 14 of slider 1301 and slider 2 1302 to connect slider 1301 and slider 2 1302, the adjusting screw 1303 rotates to drive slider 2 1302 to move, and then the latch 1304 drives slider 1301 to move to adjust the angle of the support rod 12; Slip ring 11 is fitted onto the outside of upright 1. Support rod 12 is hinged to slider 1301. Adjustment assembly 13 is used to keep upright 1 vertical under the indication of leveling instrument 5 (bubble at the center). Then, the slip ring 11 and upright 1 are fixed by the knob on the side of the slider (the knob end is a fastening screw that is threadedly connected to the slider, and the knob end abuts against upright 1). The center of the lower surface of marking disk 2 is fixed to upright 1, marking... Figure 3 The center is the top measurement point 4, which coincides with the center of the marking disk 2. The groove 8 of the base 7 is the bottom measurement point. By observing the leakage of the color column 6 on the pole 1 and the color strip 9 on the base 7 in the photograph, the offset distance of the top and bottom measurement points in the photo is calculated in combination with the length of the pole 1. In use, first select a flat surface and place the base 7 at the target position. Use the anti-slip pad 15 for initial fixation. If the base 7 is still unstable, insert bolts through the auxiliary fixing holes 16 to fix it to the ground. After measuring the coordinates of the bottom measuring point at the groove 8 of the base 7 separately, install the bracket consisting of the slip ring 11 and the support rod 12 onto the base 7. Slide the slider 1301 hinged to the support rod 12 into the slide groove 1305. Then insert the locking buckle 1304 into the slot 14 of the slider 1301 and the slider 2 1302 to complete the installation of the slip ring 11 and the support rod 12. Then insert the upright 1 into the slip ring 11. Insert the end of the upright 1 away from the marking plate 2 into the groove 8. Rotate the adjusting screw 1303 and observe that the bubble of the leveling instrument 5 is in the center. At this time, the upright 1 is perpendicular to the horizontal plane. Tighten the knob on the side of the slider to fix the slip ring 11 and the upright 1. If the inclination angle of the layout surface is too large, a shim can be added under the base 7 for adjustment. During aerial photogrammetry, the markings are used to adjust the angle of inclination. Figure 3 Obtain the top reference, observe the number and position of the exposed color bars 6 or color bands 9 to determine the angle between the marker disk 2 and the line of sight, and calculate the offset distance between the top measurement point 4 and the bottom measurement point on the photo based on the length of the pole 1. Correct the coordinates of the marker point. If the pole 1 is completely blocked by the marker disk 2 and the tilt angle of the base 7 is small and the accuracy requirement is not high, the color band 9 of the base 7 can be observed. If the accuracy requirement is high or the tilt angle of the base 7 is large, only the color bars 6 of the pole 1 should be observed.

[0027] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0028] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary tool for marking control points in vertical aerial photogrammetry, characterized in that: Includes a pole (1) and a marking disk (2). The upper surface of the marking disk (2) is provided with a marking diagram (3). One end of the pole (1) near the marking disk (2) is fixedly connected to the center of the lower surface of the marking disk (2). The center of the marking diagram (3) is the top measurement point (4). The center of the marking diagram (3) coincides with the center of the upper surface of the marking disk (2). The pole (1) is perpendicular to the lower surface of the marking plate (2), and the end of the pole (1) away from the marking plate (2) is perpendicular to the ground. A leveling device (5) is fixedly connected to the outer side of the pole (1). The outer side of the pole (1) is provided with a color column (6), the position and length of which are related to the diameter of the marking disk (2).

2. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 1, characterized in that: The end of the pole (1) away from the marking disk (2) is provided with a base (7), and the center of the upper surface of the base (7) is provided with a groove (8), which is the bottom measuring point. The end of the pole (1) away from the marking disk (2) is inserted into the groove (8).

3. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 2, characterized in that: The upper surface of the base (7) is provided with a color band (9), the color band (9) is related to the diameter of the marking disk (2) and the length of the upright (1), the diameter of the base (7) is equal to the diameter of the marking disk (2), the outer side of the upper surface of the marking disk (2) is provided with a marking ring (10), the marking ring (10), the color band (9) and the color column (6) are all eye-catching colors.

4. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 2, characterized in that: The outer side of the upright (1) is fitted with a slip ring (11), and the outer side of the slip ring (11) is hinged with a plurality of support rods (12), and the other end of the support rods (12) is connected to an adjustment component (13).

5. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 4, characterized in that: The adjustment assembly (13) includes a slider one (1301), a slider two (1302), an adjustment screw (1303), a latch (1304), and a slide groove (1305). The slider one (1301) is hinged to the support rod (12), and the slide groove (1305) is fixedly connected to the upper surface of the base (7).

6. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 5, characterized in that: Both slider one (1301) and slider two (1302) are slidably connected to the slide groove (1305). One end of the adjusting screw (1303) is inserted into the slide groove (1305) and threadedly connected to the slide groove (1305). The end of the adjusting screw (1303) inserted into the slide groove (1305) is rotatably connected to slider two (1302).

7. An auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 5, characterized in that: The upper surfaces of both slider one (1301) and slider two (1302) are provided with slots (14), and the latch (1304) is U-shaped, with both ends of the latch (1304) inserted into the two slots (14) respectively.

8. The auxiliary tool for marking control points in vertical aerial photogrammetry according to claim 2, characterized in that: The bottom surface of the base (7) is provided with an anti-slip pad (15), and the upper surface of the base (7) is provided with multiple auxiliary fixing holes (16). The auxiliary fixing holes (16) are used to fix the base (7) with bolts when it is unstable.

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