Image control point target

Abstract

The utility model discloses a kind of image control point targets, it is related to geographic information surveying and mapping technical field, comprising: fixed target plate;Two guide plates, symmetrically fixed in the same side surface of fixed target plate;Dynamic target plate, for cooperating with fixed target plate;Two guide grooves, symmetrically set in the same side of dynamic target plate and corresponding guide plate sliding fit, and the width of the opening at one end of guide groove is greater than the width of guide plate, and the width of the opening at the other end is less than the width of guide plate for resisting and pressing the side wall of joint guide plate, and the size of the slot of guide groove is gradually changed;The utility model realizes the convenient unfolding fixing of fixed target plate and dynamic target plate by the interference fit formed by resisting and pressing between guide plate and guide groove, and by the deformation of the structure of dynamic target plate itself, tool-free quick unlocking can be realized, and the efficiency of layout is improved.

Description

Technical Field

[0001] This utility model relates to the field of geographic information surveying and mapping technology, specifically to a ground control point target. Background Technology

[0002] The acquisition of high-precision geographic information data relies heavily on the accurate matching of images collected by remote sensing platforms such as UAVs with actual locations. Ground control point targets are the core ground benchmark tools for achieving this matching, and their deployment efficiency and point accuracy directly determine the accuracy of the final surveying results. Currently, the foldable ground control point targets commonly used in surveying operations mostly adopt hinge connections combined with pins or magnets for locking.

[0003] However, existing foldable image control targets typically rely on additional parts such as bolts and pins during the unfolding or folding and locking process, making the locking and unlocking process cumbersome and laborious. This is extremely inconvenient to operate in harsh field environments, and the parts are prone to loss and corrosion. If rigid fastening is used to ensure wind resistance stability, unlocking becomes even more difficult. If a loose fit is used for convenience, there is a risk of loosening of the connection and affecting measurement accuracy. There is a lack of a convenient and fast unlocking mechanism that does not require tools and is based on the structural changes of the image control target itself. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an image control point target.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A control point target includes:

[0007] Calibration target plate;

[0008] Two guide plates are symmetrically fixed to the same side of the calibration target plate;

[0009] A movable target plate, used in conjunction with a fixed target plate;

[0010] Two guide grooves are symmetrically opened on the same side of the moving target plate and slide in cooperation with the corresponding guide plate. The opening width of one end of the guide groove is greater than the width of the guide plate, while the opening width of the other end is less than the width of the guide plate. This is used to press against and engage the side wall of the guide plate. The size of the guide groove opening is gradually changing.

[0011] When the fixed target plate and the moving target plate are unlocked, the moving target plate is bent at the two apex corners near the fixed target plate, so that the width of the opening end of the guide groove against the side wall of the guide plate expands and it separates from the side wall of the guide plate.

[0012] Preferably, two sets of arc-shaped grooves are symmetrically opened on the back of the moving target plate, and one end of each set of arc-shaped grooves is connected to the opening end of a set of guide grooves.

[0013] Preferably, the arc-shaped groove has multiple sets of grooves along the length direction of the arc-shaped sidewall, the length direction of the grooves is perpendicular to the length direction of the arc-shaped sidewall, and the multiple sets of grooves are densely distributed at one end near the guide groove, while they are sparsely distributed at the other end.

[0014] Preferably, the sidewall of the guide plate is attached to the middle sidewall of the guide groove, and multiple sets of fitting grooves are opened on the sidewall of the guide plate. The fitting grooves are distributed along the length direction of the sidewall of the guide plate, and the fitting grooves are parallel to the opening end of the guide groove.

[0015] Preferably, it also includes a sleeve and a fixing post. The sleeve has a semi-circular notch at one end near the calibration target plate, and the depth of the notch is equal to the thickness of the moving target plate. At the same time, the fixing post fixed to the moving target plate slides through the sleeve.

[0016] Preferably, a guide groove is provided on the inner side wall of the sleeve, and the guide groove is composed of a connected annular groove and a strip groove. The two sets of strip grooves are symmetrically arranged at the end of the inner wall of the sleeve away from the calibration target plate. At the same time, a slider is provided on the circumferential surface of the fixing column relative to the position of the strip groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention employs an interference fit self-locking mechanism based on structural elasticity. Through the unique irregular structure of the guide groove, with its gradually changing width at both ends, it cooperates with the guide plate. In the locked state, it relies on the material's own restoring force to generate significant static friction, achieving mechanical self-locking. Unlocking requires a specific action—deliberately bending the moving target plate—to achieve this. This allows the target to resist interference from strong winds, impacts, vibrations, and other complex outdoor environments when deployed, enhancing the stability of the image control point target after deployment. Furthermore, the simple structural design effectively reduces the probability of malfunctions during outdoor operation. Attached Figure Description

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

[0020] Figure 1 This is a top view of the unfolded present invention;

[0021] Figure 2 This is a partial sectional view of the present invention.

[0022] Figure 3 For the present utility model Figure 1 Enlarged schematic diagram of part A;

[0023] Figure 4This is a bottom view of the unfolded version of this utility model;

[0024] Figure 5 This utility model Figure 3 A frontal view diagram.

[0025] The diagram shows the following labels: 1. Target plate; 11. Guide plate; 2. Moving target plate; 21. Guide groove; 22. Arc groove; 3. Sleeve; 31. Guide groove; 4. Fixed column; 41. Slider. Detailed Implementation

[0026] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0027] Example

[0028] like Figures 1 to 5 As shown, a control point target includes:

[0029] Calibration target plate 1;

[0030] Two guide plates 11 are symmetrically fixed to the same side of the calibration target plate 1;

[0031] The movable target plate 2 is used to cooperate with the fixed target plate 1;

[0032] Two guide grooves 21 are symmetrically opened on the same side of the moving target plate 2 and slide in cooperation with the corresponding guide plate 11. The opening width of one end of the guide groove 21 is greater than the width of the guide plate 11, while the opening width of the other end is less than the width of the guide plate 11. The guide groove 21 has a gradually changing groove size.

[0033] When the calibrating target plate 1 and the moving target plate 2 are unlocked, the moving target plate 2 is bent to the two apex corners of the calibrating target plate 1, so that the width of the opening end of the guide groove 21 against the side wall of the guide plate 11 expands and it separates from the side wall of the guide plate 11.

[0034] Specifically, the image control point targets required for geographic information mapping and remote sensing image acquisition are first deployed outdoors. When the geographic information mapping of the area is completed and needs to be moved or the work is finished, the operator first holds the moving target plate 2 with both hands near the two top corners of the fixed target plate 1 and bends it upwards. When the two top corners are bent towards the front of the moving target plate 2, the guide groove 21 set on the side of the moving target plate 2 will deform at the end near the back of the moving target plate 2 due to bending. This causes the width of the opening end of the guide groove 21 against the side wall of the guide plate 11 to increase and detach from the side wall surface of the guide plate 11. This releases the constraint between the moving target plate 2 and the guide plate 11, allowing the moving target plate 2 and the fixed target plate 1 to separate along the length direction of the guide plate 11. This enables the fixed target plate 1 and the moving target plate 2 to be quickly unlocked and separated, facilitating subsequent folding and storage. At the same time, the upper limit of the bending of the moving target plate 2 is greater than the degree of bending at its two top corners.

[0035] The back of the moving target plate 2 is symmetrically provided with two sets of arc-shaped grooves 22, and one end of each set of arc-shaped grooves 22 is connected to the opening end of a set of guide grooves 21.

[0036] Specifically, the core function of the arc groove 22 is to guide and optimize stress distribution. When a bending force is applied to the two apex corners of the moving target plate 2, the stress will preferentially concentrate in the area of ​​the arc groove 22, thereby ensuring that the deformation occurs precisely at this location and extends along the preset arc path. This effectively prevents cracks or plastic deformation from occurring in other unforeseen locations due to stress concentration, greatly improving the reliability and service life of the structure.

[0037] The arc-shaped groove 22 has multiple sets of grooves along the length of the arc-shaped sidewall. The length of the grooves is perpendicular to the length of the arc-shaped sidewall. The multiple sets of grooves are densely distributed at one end near the guide groove 21, while they are sparsely distributed at the other end.

[0038] Specifically, this gradient groove design forms a "gradient flexible hinge" structure. In the area requiring maximum bending deformation to unlock, near the guide groove 21, the dense grooves make the material softer, easier to deform, and require less operating force. In the area with less deformation, away from the guide groove 21, the sparse grooves provide stronger support and ensure the overall structural rigidity. This design achieves the most effective unlocking deformation with minimal force, while balancing the structural stability of the calibrated target plate 1 and the moving target plate 2 in the unfolded and assembled state.

[0039] The side wall of the guide plate 11 is attached to the middle side wall of the guide groove 21, and multiple sets of fitting grooves are opened on the side wall of the guide plate 11. The fitting grooves are distributed along the length of the side wall of the guide plate 11, and the fitting grooves are parallel to the opening end of the guide groove 21.

[0040] Specifically, when the calibration target plate 1 and the moving target plate 2 are unfolded, spliced ​​and locked, the narrow end opening sidewall of the guide groove 21 will press against the fitting groove opened on the sidewall of the guide plate 11 and produce a slight deformation, so that the fitting groove is filled, thereby forming a wavy curved surface between the narrow end sidewall of the guide groove 21 and the sidewall of the guide plate 11, thereby enhancing the stability of the guide plate 11 locked in the guide groove 21.

[0041] It also includes a sleeve 3 and a fixing post 4. The sleeve 3 has a semi-circular notch at one end near the calibration target plate 1, and the depth of the notch is equal to the thickness of the moving target plate 2. At the same time, the fixing post 4, which is fixed to the moving target plate 2, slides through the sleeve 3.

[0042] Specifically, the sleeve 3 and the fixed column 4 constitute the rotation axis of the target plate 1 and the moving target plate 2 when they are unfolded and retracted. The semi-circular notch at the upper end of the sleeve 3 ensures that when the moving target plate 2 is rotated to be coplanar with the target plate 1, its edge can be perfectly embedded in the notch, so that the two are spliced ​​into a complete plane, ensuring the overall flatness of the target surface and ensuring the accuracy of the survey data.

[0043] The inner wall of the sleeve 3 is provided with a guide groove 31, which is composed of a connected annular groove and a strip groove. The two sets of strip grooves are symmetrically arranged at the end of the inner wall of the sleeve 3 away from the calibration target plate 1. At the same time, the circumference of the fixing column 4 is provided with a slider 41 corresponding to the position of the strip groove.

[0044] Specifically, the guide groove 31, in conjunction with the slider 41, achieves a user-friendly "lift-rotate-fall and lock" operation logic. The operator only needs to lift the target plate 2 upwards, and the slider 41 rises along a set of strip grooves; rotate the target plate 2, and the slider 41 slides into the annular groove from the upper opening of the strip groove; after rotating half a turn, release the target plate 2, and the slider 41 slides into the end of another set of strip grooves under the action of gravity to complete the locking. This mechanism simplifies the complex alignment and locking process into a smooth and intuitive action, improving the convenience of operation when the target plate 2 and the fixed target plate 1 are unfolded and folded for storage, and greatly improving the efficiency of field operations.

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

Claims

1. A control point target, characterized in that, include: Calibration target plate; Two guide plates are symmetrically fixed to the same side of the calibration target plate; A movable target plate, used in conjunction with a fixed target plate; Two guide grooves are symmetrically opened on the same side of the moving target plate and slide in cooperation with the corresponding guide plate. The opening width of one end of the guide groove is greater than the width of the guide plate, while the opening width of the other end is less than the width of the guide plate. This is used to press against and engage the side wall of the guide plate. The size of the guide groove opening is gradually changing. When the fixed target plate and the moving target plate are unlocked, the moving target plate is bent at the two apex corners near the fixed target plate, so that the width of the opening end of the guide groove against the side wall of the guide plate expands and it separates from the side wall of the guide plate.

2. The image control point target according to claim 1, characterized in that: The back of the moving target plate is symmetrically provided with two sets of arc-shaped grooves, and one end of each set of arc-shaped grooves is connected to the opening end of a set of guide grooves.

3. The image control point target according to claim 2, characterized in that: The arc-shaped groove has multiple sets of grooves along the length of the arc-shaped sidewall. The length of the grooves is perpendicular to the length of the arc-shaped sidewall. The multiple sets of grooves are densely distributed at one end near the guide groove, while they are sparsely distributed at the other end.

4. The image control point target according to claim 1, characterized in that: The sidewall of the guide plate is attached to the middle sidewall of the guide groove, and multiple sets of fitting grooves are opened on the sidewall of the guide plate. The fitting grooves are distributed along the length of the sidewall of the guide plate, and the fitting grooves are parallel to the opening end of the guide groove.

5. The image control point target according to claim 1, characterized in that: It also includes a sleeve and a fixing post. The sleeve has a semi-circular notch at one end near the calibration target plate, and the depth of the notch is equal to the thickness of the moving target plate. At the same time, the fixing post fixed to the moving target plate slides through the sleeve.

6. The image control point target according to claim 5, characterized in that: The inner wall of the sleeve is provided with a guide groove, which is composed of a connected annular groove and a strip groove. The two sets of strip grooves are symmetrically arranged at the end of the inner wall of the sleeve away from the calibration target plate. At the same time, the circumferential surface of the fixing column is provided with a slider corresponding to the position of the strip groove.

Images