Target device

Abstract

The present disclosure provides a target device. The target device is used for a track, comprising a fixing assembly, an adapter and a target. The fixing assembly comprises a first fixing piece, a second fixing piece and a connecting piece, the connecting piece detachably connects the track between the first fixing piece and the second fixing piece. The adapter is fixedly connected to the first fixing piece, and the adapter comprises a mounting platform, the mounting platform is located on the side of the first fixing piece away from the second fixing piece. The target comprises a base and a support plate, the base is connected to the mounting platform, and the support plate is used for supporting a prism and a chessboard pattern, the orthographic projection of the prism on the chessboard pattern is located at the center of the chessboard pattern. The present disclosure fixes and connects the target on the rail through the fixing assembly and the adapter, and the target can be arranged at a suitable position. The target comprises the chessboard and the prism, the prism can cooperate with the laser emission module of the range finder, and the chessboard can cooperate with the image shooting module of the range finder, so that the measurement accuracy is improved and the error is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of measurement technology, and in particular, to a target device. Background Technology

[0002] Measuring track settlement or deformation is a crucial aspect of railway engineering and subway construction. Track settlement can be determined by placing multiple targets along the track and using measuring instruments (e.g., laser rangefinders) to measure changes in the elevation of these targets. While targets can be secured to the track using fastening components, the size of these targets has increased with rising measurement accuracy requirements. Furthermore, the limited space around the track makes it difficult to properly position targets using conventional fastening methods. Utility Model Content

[0003] In view of this, the present disclosure provides a target device that improves the connection method between the target and the track in order to fix the target in a suitable position.

[0004] The target device for a track includes: a fixing assembly, an adapter, and a target. The fixing assembly includes a first fixing member, a second fixing member, and a connector. The connector detachably secures the first and second fixing members to engage the track between them. The adapter is fixedly connected to the first fixing member and includes a mounting platform located on the side of the first fixing member opposite to the second fixing member. The target includes a base and a support plate. The base is connected to the mounting platform. The support plate supports a prism and a checkerboard pattern. The checkerboard pattern is disposed on a first surface of the support plate. The front face of the prism is parallel to the checkerboard pattern. The orthographic projection of the prism onto the checkerboard pattern is located at the center of the checkerboard pattern. At least a portion of the prism's mirror surface is exposed to the external environment.

[0005] In one embodiment, the adapter includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are fixedly connected to a first fixing member, and the first connecting part is perpendicular to the second connecting part.

[0006] In one implementation, the base is rotatably connected to the mounting platform.

[0007] In one implementation, two rounded corners are provided between the edge of the base away from the support plate and the two side edges.

[0008] In one implementation, the included angle between the base and the support plate is A, where 0°≤A≤180°.

[0009] As one implementation method, reinforcing ribs are provided between the base and the support plate.

[0010] In one embodiment, the target device further includes a mounting shell, in which a prism is disposed. The mounting shell is disposed on a second plate surface of a support plate opposite to the checkerboard pattern. The checkerboard pattern has a first opening, and the support plate has a second opening. The first opening, the second opening, and the orthographic projection of the prism on the second plate surface at least partially overlap, so as to expose at least a portion of the mirror surface of the prism to the external environment.

[0011] In one embodiment, the target device further includes a protective cover disposed on the second plate, wherein the orthographic projection of the mounting shell on the second plate falls at least partially into the orthographic projection of the protective cover on the second plate.

[0012] In one implementation, the area of ​​the first opening is less than or equal to the area of ​​the second opening.

[0013] In one implementation, a colloid is filled between the prism and the mounting housing.

[0014] According to the target device disclosed herein, the target is fixedly connected to the rail via a fixing component and an adapter, allowing the target to be positioned appropriately, i.e., on the side of one fixing component facing away from the other. The target includes a checkerboard pattern and a prism. The prism can cooperate with the laser emission module of a rangefinder, and the checkerboard pattern can cooperate with the image capturing module of the rangefinder. By combining laser ranging and image recognition to measure the displacement of the target, measurement accuracy is improved and errors are reduced. Attached Figure Description

[0015] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0016] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0017] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0018] Figure 1 This is a schematic diagram of a target device according to an embodiment of the present disclosure.

[0019] Figure 2 for Figure 1 A schematic diagram of the target device mounted on the track.

[0020] Figure 3 for Figure 1 A schematic diagram of the target structure of the target device in the diagram.

[0021] Figure 4 for Figure 1 A schematic diagram showing the positions of the prisms and checkerboard pattern of the target device.

[0022] Figure 5 for Figure 3 A structural diagram of the target from another perspective.

[0023] Figure 6 for Figure 1 A schematic diagram of the adapter of the target device in the diagram.

[0024] Figure 7 To be irradiated by laser Figure 3 A schematic diagram of the target.

[0025] Figure 8 for Figure 1 A schematic diagram of the mounting shell and target structure of the target device.

[0026] Figure 9 for Figure 8 A schematic diagram of the mounting shell.

[0027] Figure 10 for Figure 4 The diagram shows the exploded structure of the checkerboard pattern and the support plate.

[0028] Explanation of reference numerals in the attached drawings: 100, fixing component; 10, first fixing member; 101, upper end face of the first fixing member; 102, side end face of the first fixing member; 11, second fixing member; 12, groove; 13, connector; 200, adapter; 20, mounting platform; 201, hollow part; 21, first connecting part; 211, reserved hole; 22, second connecting part; 300, target; 30, base; 301, screw hole; 302, rounded corner; 31, support plate; 311, first plate surface; 312, second plate surface; 313, second opening; 32, prism; 33, checkerboard pattern; 331, first opening; 34, reinforcing rib; 400, track; 40, lower flange; 500, mounting shell; 50, front end face of the mounting shell; 600, protective cover. Detailed Implementation

[0029] The following will illustrate this solution provided in conjunction with specific embodiments and accompanying drawings.

[0030] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0031] In railway engineering and subway construction technology, targets are usually fixed on the track, and the track settlement or deformation is observed by measuring the displacement of the targets using a rangefinder.

[0032] Traditional targets consist only of prisms, which can reflect the laser or light emitted by the rangefinder at a precise angle, providing a stable and reliable reflected signal. This allows the rangefinder to accurately capture the reflected signal and calculate distance and position information.

[0033] With the development of ranging technology, image acquisition modules have been incorporated into rangefinders to improve measurement accuracy. These modules utilize image recognition technology to measure target displacement. By combining laser ranging technology with image recognition, rangefinders can measure target displacement more accurately. However, image recognition places several requirements on the image, such as high contrast, appropriate size, and a simple background. These requirements ensure that the image meets the needs of subsequent processing and analysis, and traditional targets often fail to meet these requirements.

[0034] To solve these problems, existing targets must be improved to meet measurement accuracy requirements. However, improving the target inevitably increases its size. The limited space around the track makes it difficult to secure the target in a suitable position using conventional fixing components.

[0035] In view of this, refer to Figure 1 and Figure 2 This disclosure provides a target device. For ease of understanding, in the accompanying drawings, the horizontal direction is indicated by arrow x, the vertical direction by arrow y, and the extension direction of the track 400 by arrow z, wherein arrow y indicates the direction of the target device from bottom to top.

[0036] The target device for track 400 includes: a fixing assembly 100, an adapter 200, and a target 300. The fixing assembly 100 includes a first fixing member 10, a second fixing member 11, and a connector 13. The connector 13 detachably fixes the first fixing member 10 and the second fixing member 11 to engage the track 400 between the first fixing member 10 and the second fixing member 11.

[0037] The first fixing member 10 and the second fixing member 11 are each provided with a groove 12, and the opening directions of the grooves 12 are opposite to each other. In a cross section perpendicular to the z-direction, the contour of the groove 12 matches the contour of the edge of the lower flange 40 of the track 400, so as to snap the first fixing member 10 and the second fixing member 11 onto both sides of the track 400 respectively. The first fixing member 10 and the second fixing member 11 may be provided with screw holes, and the connecting member 13 may be a screw. The screw can pass through the first fixing member 10 and the second fixing member 11 in sequence, and the part of the screw protruding from the first fixing member 10 or the second fixing member 11 can be screwed on to securely fix the first fixing member 10 and the second fixing member 11 to the track 400. By removing the screw, the distance between the first fixing member 10 and the second fixing member 11 can be adjusted to remove the first fixing member 10 and the second fixing member 11 from the track 400. Thus, the fixing assembly 100 can be detachably snapped onto both sides of the track 400 by means of the connecting member 13. Meanwhile, the bolt and screw combination allows for a wide range of adjustment of the distance between the first fixing member 10 and the second fixing member 11. This fixing assembly 100 can be used for tracks 400 of different sizes. The connector 13 in this disclosure is not limited to a screw. In some embodiments, the connection between the connector 13 and the first fixing member 10 and the second fixing member 11 can be a pin connection. For example, the connector 13 can be a pin, and slots can be provided on the first fixing member 10 or the second fixing member 11. The fixing assembly 100 can be detachably snapped onto both sides of the track 400 via the connector 13.

[0038] The adapter 200 is fixedly connected to the first fixing member 10. The adapter 200 includes a mounting platform 20, which is located on the side of the first fixing member 10 opposite to the second fixing member 11. The adapter 200 can be fixedly connected to the first fixing member 10 by means of bolts, adhesive, etc., or it can be integrally formed with the first fixing member 10. In some embodiments, the adapter 200 can be fixedly connected to the first fixing member 10 by bolts. The bolt connection allows for a detachable connection between the adapter 200 and the first fixing member 10, facilitating replacement and maintenance.

[0039] The mounting platform 20 is used to support the target 300. Since wheels need to pass over the track 400, the available space above the first fixing member 10 is limited. If the mounting platform 20 is positioned above the first fixing member 10, the relatively large target 300 may interfere with the wheels. Therefore, this disclosure positions the mounting platform 20 on the side of the first fixing member 10 away from the second fixing member 11. In the horizontal direction, the adapter 200 can extend from the side end face 102 of the first fixing member 10 away from the track 400 to form the mounting platform 20. In some embodiments, the height of the mounting platform 20 in the vertical direction can be lower than the upper end face 101 of the first fixing member 10, thereby reducing the height of the target 300 and making it less likely to interfere with the wheels. Because the mounting platform 20 extends away from the track 400, its horizontal dimensions are not limited, and the target 300 can be positioned far from the track 400, making it less likely to collide with or interfere with the wheels. It is even possible to make the projection of the target 300 on the xz plane not coincide with the projection of the wheel on the xz plane, so that the size of the target 300 in the vertical direction is not limited by the wheel.

[0040] refer to Figures 3-5 The target 300 includes a base 30 and a support plate 31, with the base 30 and support plate 31 integrally formed. The integrally formed target 300 has no connection points, making it less susceptible to loosening or deformation due to shaking during the movement of the track 400. The base 30 is connected to the mounting platform 20 to set the target 300 on the mounting platform 20.

[0041] The support plate 31 supports the prism 32 and the checkerboard pattern 33. The prism 32 reflects the laser back to the emission source, allowing the measuring device to accurately capture the reflected signal and calculate distance and position information. The checkerboard pattern 33 has obvious contrast and regular geometry, which can serve as a visual reference point, facilitating image processing algorithms to recognize and locate it.

[0042] The checkerboard pattern 33 is set on the first surface 311 of the support plate 31. The checkerboard pattern 33 can be printed on a sticker and then pasted onto the first surface 311. If the checkerboard pattern 33 on the sticker fades after long-term use, affecting measurement, the checkerboard pattern 33 can be easily replaced. The checkerboard pattern 33 can also be directly painted onto the first surface 311.

[0043] At least a portion of the mirror surface of prism 32 is exposed to the external environment, allowing the laser emitted by the rangefinder to be reflected by prism 32. The front face of prism 32 is parallel to the checkerboard pattern 33, and the laser emitted by the rangefinder can be reflected back to the rangefinder at an appropriate angle by prism 32. The orthographic projection of prism 32 onto the checkerboard pattern 33 is located at the center of the checkerboard pattern 33, ensuring that the laser illumination point of the rangefinder coincides with the center of the captured image, thus improving measurement accuracy. With this arrangement, prism 32 can work in conjunction with the laser emitting module of the rangefinder, and the checkerboard pattern 33 can work in conjunction with the image capturing module of the rangefinder. By combining laser ranging and image recognition to measure the displacement of the target 300, measurement accuracy is improved and errors are reduced.

[0044] Because trains frequently pass over track 400, the track vibrates for extended periods, which can cause the connections between various components of the target device to loosen, leading to displacement of the target 300. To improve the seismic resistance of the target device, refer to... Figure 1 and Figure 2 The adapter 200 of this disclosure includes a first connecting portion 21 and a second connecting portion 22. The first connecting portion 21 and the second connecting portion 22 are fixedly connected to a first fixing member 10, with the first connecting portion 21 perpendicular to the second connecting portion 22. The first connecting portion 21 is fitted and fixedly connected to the upper end face 101 of the first fixing member 10, and the first connecting portion 21 is fitted and fixedly connected to the side end face 102 of the first fixing member 10. This disclosure provides two connecting portions, increasing the connection area and improving connection stability. For example, more bolts can be used for a more stable connection. The first connecting portion 21 being perpendicular to the second connecting portion 22 allows for a closer fit between the adapter 200 and the first fixing member 10, reducing wobbling. Furthermore, the first fixing member 10 can restrict the displacement of the adapter 200 in both the x and y directions. The mounting platform 20 can be perpendicular to the second connecting portion 22 to form a horizontal support surface for supporting the target 300. The mounting platform 20 can be integrally formed with the second connecting portion 22, reducing connection points and improving stability. This disclosure does not limit the connection method between the first connecting part 21 and the second connecting part 22 and the first fixing member 10, such as bolt connection, bonding and integral molding, etc.

[0045] The rangefinder can be positioned around the track 400, emitting a laser at the target 300. Its relative position to the target 300 is not fixed. Under different measurement conditions, the angle between the rangefinder and the target 300 varies. Therefore, the orientation of the target 300 must be adjusted accordingly for different rangefinder positions, ensuring that the prism 32 and checkerboard pattern 33 on the target 300 are aligned with the rangefinder. (Reference) Figure 1 , Figure 5 and Figure 6The base 30 of this disclosure is rotatably connected to the mounting platform 20. For example, the mounting platform 20 may have a shaft hole (not shown), and the base 30 may have a screw hole 301, which is coaxial with the shaft hole on the mounting platform 20. Bolts can pass through the screw hole 301 and the shaft hole in sequence, and be tightened to fix the base 30 and the mounting platform 20 together. When it is necessary to rotate the target 300, the bolt is unscrewed, and the target 300 can rotate about the axis of the bolt so that the prism and the checkerboard pattern 33 are aligned with the rangefinder. In some embodiments, the mounting platform 20 may have multiple cutouts 201 surrounding the shaft hole, and correspondingly, the base 30 may have multiple screw holes 301. Multiple bolts can pass through the screw holes 301 and the cutouts 201 in sequence to fix the target 300 to the mounting platform 20. By providing multiple hollow sections 201, more bolts can be installed between the target 300 and the mounting platform 20 to more securely fix the target 300 and the mounting platform 20, thereby improving seismic resistance. This disclosure does not limit the rotatable connection method between the base 30 and the mounting platform 20. In some embodiments, the base 30 and the mounting platform 20 can be connected by bearings.

[0046] In the above embodiments, since the base 30 is rotatably connected to the mounting platform 20, it is easy for the base 30 to interfere with the adapter 200 when it rotates. Therefore, in this disclosure, two rounded corners 302 are provided between the edge of the base 30 away from the support plate 31 and the two side edges. The rounded corners 302 reduce the size of the base 30 and can prevent the base 30 from rotating and colliding with the adapter 200.

[0047] refer to Figure 7 In some embodiments, the angle between the base 30 and the support plate 31 is A, where 0° ≤ A ≤ 180°. If the laser L emitted by the rangefinder does not perpendicularly illuminate the prism 32, measurement errors are likely to occur. Therefore, the angle A between the base 30 and the support plate 31 in this application can be set according to the position of the rangefinder. For example, the base 30 is usually horizontally positioned. When the rangefinder is directly above the target 300, the angle A can be 0°; when the rangefinder is directly below the target 300, the angle A can be 180°. When the rangefinder is higher than the target 300, 0° < A < 90°, and the angle A between the base 30 and the support plate 31 causes the first plate surface 311 to tilt upwards; when the rangefinder is flush with the target 300, the angle A can be 90°; when the rangefinder is lower than the target 300, the first plate surface 311 tilts downwards, and 90° < A < 180°. This configuration allows the laser L emitted by the rangefinder to illuminate the prism 32 at a perpendicular or near-perpendicular angle, reducing measurement errors. For example, A can be 0°, 45°, 80°, 85°, 90°, 95°, 120°, 135°, and 180°.

[0048] In the above embodiments, the base 30 and the support plate 31 are typically thin, resulting in a small connection area at the joint between them. Under the long-term vibration of the track 400, this makes them prone to damage. Furthermore, the support plate 31 is relatively large, and the portion far from the joint is unsupported, making it prone to wobbling and affecting measurement accuracy. To address these issues, refer to... Figure 3 and Figure 5 This disclosure includes a reinforcing rib 34 between the base 30 and the support plate 31. The reinforcing rib 34 supports the base 30 and the support plate 31. Multiple reinforcing ribs 34 can be provided, for example, two reinforcing ribs 34 can be provided, located on both sides of the prism 32 respectively. With the support of the reinforcing rib 34, the overall structural strength of the target 300 is higher and it is not easy to shake.

[0049] In the above embodiment, the prism 32 can be disposed on a second plate surface 312 of the support plate 31, facing away from the first plate surface 311. Specifically, refer to... Figure 8 and Figure 9 The target device also includes a mounting housing 500, within which the prism 32 is disposed. The mounting housing 500 is mounted on a second surface 312 of the support plate 31 facing away from the checkerboard pattern 33. For example, the front end face 50 of the mounting housing 500 can be attached to and fixed to the second surface 312. The mounting housing 500 protects the prism 32 from impact damage. The front end face 50 of the mounting housing 500 exposes the mirror surface of the prism 32 to the external environment. In some embodiments, an adhesive can be filled between the prism 32 and the mounting housing 500 body. The adhesive can fix the prism 32 to the mounting housing 500 body and prevent the prism 32 from shaking within the mounting housing.

[0050] refer to Figure 10 The checkerboard pattern 33 has a first opening 331, and the support plate 31 has a second opening 313. The first opening 331, the second opening 313, and the orthographic projection of the prism 32 onto the second plate surface 312 at least partially overlap, so that at least a portion of the mirror surface of the prism 32 is exposed to the external environment. The area of ​​the first opening 331 is less than or equal to the area of ​​the second opening 313, so that the first plate surface 311 is not exposed between the prism 32 and the checkerboard pattern 33, thereby improving measurement accuracy. When the checkerboard pattern 33 is printed onto a sticker, the first opening 331 is set on the sticker.

[0051] refer to Figure 5 The target device also includes a protective cover 600, which is disposed on the second plate surface 312. The orthographic projection of the mounting shell 500 on the second plate surface 312 at least partially falls within the orthographic projection of the protective cover 600 on the second plate surface 312. The protective cover 600 protrudes from the second plate surface 312 and forms a receiving space therein, within which the mounting shell 500 is enclosed. The protective cover 600 prevents the mounting shell 500 from being damaged by impact.

[0052] refer to Figure 1 The first connecting portion 21 of this application is also provided with a reserved hole 211, through which an additional prism can be installed. For example, a screw can be provided on the prism, and a thread can be provided in the reserved hole 211. The prism is positioned above the reserved hole 211 by the cooperation of the screw and the thread. In some embodiments, the prism can also be fixed above the reserved hole 211 by bonding or welding. By setting an additional prism, additional measurement points can be provided. By comparing the measurement results of multiple measurement points, more reliable measurement results can be obtained.

[0053] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0054] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Similarly, "abutment" can refer to a direct abutment or an indirect abutment through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0055] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part is not intended to exclude other components or parts.

[0056] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements, these elements are not defined by these terms, which are only used to distinguish one element from another.

[0057] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0058] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A target device, characterized in that, For use in tracks, including: A fixing component, comprising a first fixing member, a second fixing member, and a connecting member, wherein the connecting member detachably fixes the first fixing member and the second fixing member to engage the track between the first fixing member and the second fixing member; An adapter is fixedly connected to the first fixing member, and the adapter includes a mounting platform located on the side of the first fixing member opposite to the second fixing member; The target includes a base and a support plate. The base is connected to the mounting platform. The support plate supports a prism and a checkerboard pattern. The checkerboard pattern is set on the first surface of the support plate. The front face of the prism is parallel to the checkerboard pattern. The orthographic projection of the prism onto the checkerboard pattern is located at the center of the checkerboard pattern. At least a portion of the mirror surface of the prism is exposed to the external environment.

2. The target device according to claim 1, characterized in that, The adapter includes a first connecting part and a second connecting part, the first connecting part and the second connecting part are fixedly connected to the first fixing member, and the first connecting part is perpendicular to the second connecting part.

3. The target device according to claim 2, characterized in that, The base is rotatably connected to the mounting platform.

4. The target device according to claim 3, characterized in that, The base has two rounded corners between its edge away from the support plate and its two side edges.

5. The target device according to claim 1, characterized in that, The included angle between the base and the support plate is A, where 0°≤A≤180°.

6. The target device according to claim 1, characterized in that, Reinforcing ribs are provided between the base and the support plate.

7. The target device according to claim 1, characterized in that, It also includes a mounting housing, in which the prism is disposed. The mounting housing is disposed on a second plate surface of the support plate opposite to the checkerboard pattern. The checkerboard pattern has a first opening, and the support plate has a second opening. The first opening, the second opening, and the orthographic projection of the prism on the second plate surface at least partially overlap, so as to expose at least a portion of the mirror surface of the prism to the external environment.

8. The target device according to claim 7, characterized in that, It also includes a protective cover disposed on the second plate surface, wherein the orthographic projection of the mounting shell on the second plate surface at least partially falls into the orthographic projection of the protective cover on the second plate surface.

9. The target device according to claim 7, characterized in that, The area of ​​the first opening is less than or equal to the area of ​​the second opening.

10. The target device according to claim 7, characterized in that, The space between the prism and the mounting shell is filled with colloid.

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