Optical mark and system for detecting a support point of a mirror of a trough solar collector

Abstract

The utility model belongs to the technical field of trough type solar energy collector support assembly quality detection, and relates to a kind of trough type solar energy collector mirror support part detection optical identification and system. Including point coordinate identification element, plane angle identification element and mounting hole adapter element;Point coordinate identification element includes first circular platform, first reflecting disc is set on the first circular platform;Plane angle identification element upper surface is provided with second reflecting disc;First circular platform is connected with mounting hole adapter element by bolt through plane angle identification element;The bottom of mounting hole adapter element is provided with the first waist cross section cylinder that is matched with the installation waist-shaped hole on the mirror support component to be measured. The utility model solves the problem of low efficiency and insufficient accuracy of traditional detection method, improves the detection accuracy and level of trough type solar energy collector mirror support part.

Description

Technical Field

[0001] This utility model belongs to the technical field of quality inspection of trough solar collector bracket assembly, and relates to an optical marking and system for inspecting the support part of the reflector of a trough solar collector. Background Technology

[0002] Solar collectors are key devices for the efficient conversion of solar energy into thermal energy and are a core component of solar thermal utilization systems. In solar thermal power generation technology, low-density solar radiation is concentrated and transferred to a heat transfer medium via heat exchange equipment, generating high-temperature steam to drive traditional power generation equipment and ultimately producing electricity. This technology, as a clean and sustainable power generation method, has significant application prospects.

[0003] In a parabolic trough solar thermal system, the solar collector support structure serves as the support for the reflectors. Its manufacturing quality and installation precision directly affect the positioning accuracy of the reflectors, thus determining the system's optical interception efficiency and overall heat collection performance. Therefore, conducting high-precision testing on the assembled collector support before reflector installation is crucial for ensuring the system's efficient and stable operation. The numerous support components for the reflectors and their spatial position and angular accuracy are fundamental to accurate reflector positioning and are the core content of support testing.

[0004] Currently, close-range photogrammetry is commonly used to inspect the support structure of reflectors. This method places high demands on the design and fabrication of inspection markers. A scientifically sound and reasonable optical marker design is a prerequisite for achieving high-precision measurements. However, existing inspection markers still have shortcomings in terms of structural stability, flatness maintenance, and dynamic monitoring. For example, marker elements are easily deformed by environmental factors, or flatness changes cannot be assessed in real time during measurement, leading to decreased angle measurement accuracy and affecting the reliability of the overall inspection results. Utility Model Content

[0005] To address the issues of low efficiency and insufficient accuracy in traditional detection methods, this invention provides an optical marking and system for detecting the support components of a parabolic trough solar collector reflector, thereby improving the accuracy and level of detection for the support components of a parabolic trough solar collector reflector.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides an optical marker for detecting the support part of a parabolic trough solar collector reflector, including a point coordinate marker element, a planar angle marker element, and a mounting hole adapter element; the point coordinate marker element includes a first circular platform and a first reflective disc disposed on the first circular platform; the planar angle marker element has a second reflective disc disposed on its upper surface; the first circular platform and the mounting hole adapter element are connected by bolts passing through the planar angle marker element; the bottom of the mounting hole adapter element is provided with a first waist-shaped cross-section column that matches the mounting waist-shaped hole on the support part of the reflector to be tested.

[0007] Preferably, the upper surface of the first circular platform is provided with a circular raised platform, and the first reflective disc is disposed on the circular raised platform.

[0008] Preferably, the outer edge of the circular raised platform is provided with an upwardly protruding annular structure.

[0009] Preferably, the bottom of the first circular platform is provided with a cylinder; the cylinder is provided with a first threaded inner hole, which is connected to one end of the bolt.

[0010] Preferably, the mounting hole adapter element includes a second circular platform; a second waist-shaped cross-section column is provided on the top of the second circular platform; the first waist-shaped cross-section column is provided at the bottom of the second circular platform; a through hole is provided at the center of the planar angle marking element, and the second waist-shaped cross-section column matches the through hole.

[0011] Preferably, the second waist-shaped cross-section column has a groove inside, and a second threaded inner hole extends downward from the bottom center of the groove; the cylinder is housed in the groove and abuts against the bottom of the groove; the other end of the bolt is connected to the second threaded inner hole.

[0012] Preferably, the through hole is provided with a plurality of mounting and operating holes in the circumferential direction.

[0013] Preferably, a blind hole is provided on the second circular platform.

[0014] Preferably, the planar angle marking element is triangular, and the three vertices of the planar angle marking element are arc-shaped; the second reflective disc is provided at the midpoint of the three vertices and one of the sides of the planar angle marking element.

[0015] Secondly, this utility model provides a detection system for the reflector support portion of a trough solar collector, comprising: Optical markers, wherein the first waist-shaped cross-section column on the multiple optical markers corresponds one-to-one with the mounting waist-shaped holes on the multiple mirror support components under test; A camera device is located outside the area where the optical mark is located.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By employing a modular design combining point coordinate markers, planar angle markers, and mounting hole adapters, high-precision inspection of the installation quality of the reflector support structure is achieved. The point coordinate markers, with their unique reflective circular structure, provide a stable and reliable coordinate acquisition reference point; the planar angle markers, through multiple reflective marks on their surface, convert the spatial orientation of the support surface into quantifiable optical signals; and the mounting hole adapters, with their specially designed waist-shaped cross-section column structure, ensure precise positioning and stable connection between the inspection markers and the support components. This invention solves the problems of low efficiency and insufficient accuracy in traditional inspection methods, improving the accuracy and level of inspection of the reflector support structure of trough solar collectors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an optical marking for detecting the reflector support part of a trough-type solar collector according to the present invention. Figure 2 This is a schematic diagram of the midpoint coordinate marking element of this utility model; Figure 3 This is a schematic diagram of the planar angle marking element in this utility model; Figure 4 This is a first-view schematic diagram of the mounting hole adapter element in this utility model; Figure 5 This is a second-view schematic diagram of the mounting hole adapter element in this utility model.

[0019] Among them: 1. Point coordinate marking element; 11. Cylinder; 12. First reflective disc; 13. First circular platform; 2. Planar angle marking element; 21. Through hole; 22. Mounting operation hole; 23. Second reflective disc; 3. Mounting hole adapter element; 31. First waist-shaped cross-section column; 32. Second circular platform; 33. Blind hole; 34. Second waist-shaped cross-section column; 35. Groove; 36. Second threaded inner hole. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: The primary objective of this invention is to provide an optical marker for detecting the support portion of the reflector in a trough-type solar collector, such as... Figures 1-5 As shown, it includes a point coordinate marking element 1, a plane angle marking element 2, and a mounting hole adapter element 3; the point coordinate marking element 1 includes a first circular platform 13 and a first reflective disc 12 disposed on the first circular platform 13; the plane angle marking element 2 has a second reflective disc 23 disposed on its upper surface; the first circular platform 13 and the mounting hole adapter element 3 are connected by bolts passing through the plane angle marking element 2; the bottom of the mounting hole adapter element 3 is provided with a first waist-shaped cross-section column 31 that matches the mounting waist-shaped hole on the support component of the reflector to be tested.

[0027] The optical marker for inspecting the support structure of a parabolic trough solar collector reflector provided by this invention achieves efficient and accurate installation quality inspection through the synergistic action of three components. The point coordinate marker element 1 serves as the measurement reference point. Its first reflective disc 12 accurately reflects light, providing a high-contrast coordinate acquisition target for the photogrammetry system, thus ensuring the accuracy of the spatial position measurement of a single support point. The planar angle marker element 2 magnifies and visualizes the spatial orientation of the support surface under test. Its second reflective disc 23 collectively defines a measurement plane, enabling the high-precision capture and quantification of minute deviations in the support surface angle. The mounting hole adapter element 3 acts as a bridge connecting the marker and the component under test. Its unique waist-shaped column design ensures that the marker can be quickly and accurately positioned on the support component, and the reliable connection structure guarantees the stability of the marker throughout the inspection process, fundamentally avoiding measurement errors caused by marker shaking or offset.

[0028] The first circular platform 13 has a circular raised platform on its upper surface, and the first reflective disc 12 is placed on the circular raised platform. The outer edge of the circular raised platform has an upward-protruding annular structure. The circular raised platform provides a precise positioning reference for the first reflective disc 12, ensuring the consistency and accuracy of the pasting position. The outer annular structure effectively prevents lateral slippage of the first reflective disc 12 during pasting, ensuring the accuracy and reliability of the coordinates of the center point of the first reflective disc 12.

[0029] The bottom of the first circular platform 13 is provided with a cylinder 11; the cylinder 11 has a first threaded inner hole, which is connected to one end of a bolt. The cylindrical structure provides stable support and precise positioning guidance for the point coordinate marking element 1, ensuring accurate alignment during assembly; while the built-in first threaded hole and the connecting bolt form a reliable fastening mechanism, tightly connecting the three independent elements into a rigid whole, effectively preventing loosening or relative displacement between the components during the testing process, fundamentally ensuring the stability of the measurement benchmark and the accuracy of the final coordinate data.

[0030] The mounting hole adapter element 3 is a one-piece precision-machined metal part, which can be made of aluminum or aluminum alloy. The mounting hole adapter element 3 includes a second circular platform 32; a second oblong cross-section column 34 is provided at the top of the second circular platform 32; a first oblong cross-section column 31 is provided at the bottom of the second circular platform 32; a through hole 21 is provided at the center of the planar angle marking element 2, and the second oblong cross-section column 34 matches the through hole 21. The precise fit between the second oblong cross-section column 34 and the through hole 21 of the planar angle marking element 2 provides stable radial positioning and circumferential constraint for the planar angle marking element 2, effectively preventing its horizontal movement and rotation.

[0031] The second oblong cross-section column 34 has a groove 35 inside, and a second threaded inner hole 36 extends downward from the bottom center of the groove 35. The cylinder 11 is housed in the groove 35 and abuts against the bottom of the groove 35. The other end of the bolt is connected to the second threaded inner hole 36. The groove 35 provides a precise space for the cylinder 11 of the point coordinate marking element 1 to be accommodated and positioned, ensuring its axial alignment and radial limit, thereby maintaining the stability of the first reflective disc 12. At the same time, the connection between the bolt and the second threaded inner hole 36 concentrates the fastening force on the bottom of the groove 35, forming a compact rigid connection, effectively eliminating the assembly gap between the components, and firmly locking the entire marking onto the mounting hole adapter element 3, jointly ensuring the long-term reliability and coordinate accuracy of the measurement reference point in complex testing environments.

[0032] The through-hole 21 has multiple mounting and operating holes 22 arranged circumferentially. It provides inspection technicians with a direct and convenient point of leverage, allowing fingers to apply stable force when accurately positioning the marker on narrow or deep support components without obstructing the measurement reference surface. This greatly improves the convenience and efficiency of installation operations, effectively reduces the risk of installation deviations or marker slippage caused by inconvenient operation, and ensures the smoothness and reliability of large-scale inspection operations.

[0033] The second circular platform 32 is provided with a blind hole 33, which provides an ideal space for embedding auxiliary fixing elements such as magnets. The magnetic attraction force can quickly and firmly attach the entire mark to the surface of the metal support component, thereby effectively overcoming the interference of vibration or accidental contact that may exist in the detection environment and ensuring the absolute stillness of the measurement reference during the data acquisition process.

[0034] The planar angle marking element 2 is triangular, with its three vertices being arc-shaped. A second reflective disc 23 is positioned at each of the three vertices and the midpoint of one of its sides. The triangular configuration itself possesses excellent stability, effectively resisting deformation and ensuring the long-term reliability of the measurement reference plane. The three arc-shaped vertices eliminate stress concentration points, further enhancing the element's durability. Furthermore, the arrangement of four second reflective discs 23 at the three vertices and the midpoint of one side constitutes a built-in flatness self-checking system, enabling real-time verification of the deformation of the reference plane during photogrammetry, thereby fundamentally guaranteeing the validity and reliability of the angle measurement results. In addition, the planar angle marking element 2 is made of carbon fiber with a thickness of over 2mm, effectively enhancing the overall structural rigidity and significantly improving its resistance to bending and deformation.

[0035] In practical applications, the reflective disc is made of glass microspheres. When performing inspections in low-light environments, the reflective disc efficiently reflects the light emitted by the camera flash, creating a significant brightness contrast with the surrounding environment while ensuring its own clear capture in the acquired image. The surface of the point coordinate marker element 1 can be oxidized to darken its color, thereby enhancing the visual contrast with the bright reflective disc. This treatment creates a high-contrast imaging background for photogrammetry, thus improving the accuracy and reliability of coordinate point identification.

[0036] The second objective of this invention is to provide a detection system for the support portion of a parabolic trough solar collector reflector, comprising: Optical markers, the first waist-shaped cross-section column 31 on multiple optical markers corresponds one-to-one with the mounting waist-shaped holes on multiple mirror support components to be tested; The camera device is located outside the area where the optical marker is located.

[0037] During the measurement process, the camera device can accurately acquire the three-dimensional coordinates of the centers of the four second reflective discs 23 on the planar angle marking element 2. Based on the spatial relationship of these four points, two data processing methods can be used to improve the measurement quality: First, the coordinates of any three points can be selected to construct the measured plane, and the flatness of the planar angle marking element 2 can be evaluated using the remaining point. This self-verification mechanism can effectively identify base plate deformation caused by improper transportation or storage, ensuring the reliability of the angle measurement results. Second, multiple planar angle measurement values ​​can be obtained using a "4-out-of-3" combination method, and then these results can be fused and calculated using data processing methods such as weighted averaging, thereby further improving the final measurement accuracy of the planar angle at the system level. If the flatness exceeds the tolerance due to deformation of the planar angle marking element 2, it can be detected, replaced, or repaired as early as possible.

[0038] The specific working methods of the detection system include: S1. Assemble the point coordinate marker element 1, plane angle marker element 2, and mounting hole adapter element 3 into a complete optical marker using bolts. Then, insert the assembled optical markers one by one into the mounting holes of the mirror support components of the trough-type solar collector bracket, through the first oblong cross-section column 31 at their bottom. During this process, the mounting operation hole 22 provides a leverage point for manual installation, ensuring convenient and accurate installation. Simultaneously, the magnet pre-installed in the blind hole 33 on the mounting hole adapter element 3 automatically adheres to the metal support surface after the marker is in place, achieving rapid pre-fixation and interference-resistant stability of the marker.

[0039] S2. After the markings are installed, a camera device is set up outside the detection area to systematically photograph the collector bracket with multiple sets of optical markings from multiple different positions and angles, ensuring that all the first reflective discs 12 and second reflective discs 23 on each marking are clearly and completely captured in a series of digital images.

[0040] S3. Using close-range photogrammetry, the acquired digital images are processed to accurately calculate the three-dimensional spatial coordinates of the center point of each first reflective disc 12, thereby evaluating the spatial positioning accuracy of each reflector support point. Simultaneously, based on the center point coordinates of the second reflective disc 23 on the planar angle marking element 2, the spatial plane equation of the support surface it represents is fitted and calculated, thus obtaining key angle parameters such as the tilt angle and azimuth angle of the support surface. Specifically, by analyzing the coplanarity of the center point coordinates of multiple second reflective discs 23, the flatness status of the planar angle marking element 2 itself during the measurement process can be monitored and verified in real time. If the flatness exceeds the tolerance due to deformation of the planar angle marking element 2, it can be detected, replaced, or repaired early.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An optical marker for detecting the support portion of a parabolic trough solar collector reflector, characterized in that, It includes a point coordinate marking element (1), a plane angle marking element (2), and a mounting hole adapter element (3); the point coordinate marking element (1) includes a first circular platform (13) and a first reflective disc (12) disposed on the first circular platform (13); the plane angle marking element (2) has a second reflective disc (23) disposed on its upper surface; the first circular platform (13) and the mounting hole adapter element (3) are connected by bolts passing through the plane angle marking element (2); the bottom of the mounting hole adapter element (3) is provided with a first waist-shaped cross-section column (31) that matches the mounting waist-shaped hole on the reflector support component to be tested.

2. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 1, characterized in that, The upper surface of the first circular platform (13) is provided with a circular raised platform, and the first reflective disc (12) is disposed on the circular raised platform.

3. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 2, characterized in that, The outer edge of the circular raised platform is provided with an upward-protruding annular structure.

4. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 1, characterized in that, The bottom of the first circular platform (13) is provided with a cylinder (11); the cylinder (11) is provided with a first threaded inner hole, which is connected to one end of the bolt.

5. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 4, characterized in that, The mounting hole adapter element (3) includes a second circular platform (32); a second waist-shaped cross-section column (34) is provided on the top of the second circular platform (32); a first waist-shaped cross-section column (31) is provided at the bottom of the second circular platform (32); a through hole (21) is provided at the center of the planar angle marking element (2), and the second waist-shaped cross-section column (34) matches the through hole (21).

6. The optical marker for detecting the support portion of a parabolic trough solar collector reflector according to claim 5, characterized in that, The second waist-shaped cross-section column (34) has a groove (35) inside, and a second threaded inner hole (36) extends downward from the bottom center of the groove (35); the cylinder (11) is housed in the groove (35) and abuts against the bottom of the groove (35); the other end of the bolt is connected to the second threaded inner hole (36).

7. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 5, characterized in that, The through hole (21) is provided with a plurality of mounting and operating holes (22) in the circumferential direction.

8. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 5, characterized in that, The second circular platform (32) is provided with a blind hole (33).

9. The optical marking for detecting the support portion of a parabolic trough solar collector reflector according to claim 1, characterized in that, The planar angle marking element (2) is triangular, and the three vertices of the planar angle marking element (2) are arc-shaped; the second reflective disc (23) is provided at the midpoint of the three vertices and one of the sides of the planar angle marking element (2).

10. A detection system for the reflector support portion of a trough solar collector, characterized in that, include: The optical markers according to any one of claims 1 to 9, wherein the first waist-shaped cross-section column (31) on the plurality of optical markers corresponds one-to-one with the mounting waist-shaped holes on the plurality of the mirror support components to be tested; A camera device is located outside the area where the optical mark is located.

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