A fiducial target

Abstract

The utility model relates to the technical field of measurement discloses a kind of measurement reference target, including protective box, protection assembly and driving part, the upper portion of protective box is detachably connected with box cover, box cover center is set in open shape, the inside of protective box is provided with multi-faceted retroreflective target, protection assembly is set in the outside of multi-faceted retroreflective target, including protection plate, round table board, sealing plate and limit along, protection plate is fixedly connected at the top of multi-faceted retroreflective target, round table board is fixedly connected at the bottom of multi-faceted retroreflective target.In the utility model, protection assembly is set, can be fully closed protection when not working, protection plate completely shields box cover opening, cooperation limit along forms double seal, prevent dust, water flow into protective box inside, avoid target surface pollution or internal component rust, under working condition, driving part drives target to rise, by cooperation of round table board and drain hole, rainwater flowing into opening place can be quickly discharged.

Description

Technical Field

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

[0002] In the field of measurement technology, measurement reference targets are the core basic components for achieving high-precision positioning and monitoring. They are widely used in tunnel engineering, building construction, geological disaster monitoring and other scenarios. Their core function is to form a clear identification point under external light source illumination through their own reflective properties, providing a precise reference for measurement equipment and ensuring the accuracy of data such as displacement monitoring and spatial positioning. In tunnel engineering, targets often need to be deployed in complex environments that are humid and dusty for a long time. They not only have to withstand the erosion of water vapor and dust in the environment, but also have to deal with situations such as water accumulation and dripping in the tunnel. Therefore, the protective performance and environmental adaptability of the target itself directly determine the stability of the measurement data and the service life of the equipment.

[0003] Upon investigation, it was found that existing measurement benchmark targets and their supporting protective structures mostly adopt simple shells or semi-open protective designs. Some targets are only stored in a basic box, and there is no effective sealing structure between the box lid and the box body, which cannot prevent dust from entering the target surface and moisture from seeping into the internal components.

[0004] However, in actual use, when not in operation, the measurement reference target cannot achieve full-enclosed protection. Dust and water can easily enter the protective box, causing surface contamination of the target and corrosion of internal components, which shortens the service life of the equipment. This not only affects the normal use of the target but also reduces the accuracy of the measurement data. Therefore, a measurement reference target is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a measurement reference target, which aims to solve the problem that existing measurement reference targets lack effective protective functions.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a measurement reference target, comprising: The protective box has a detachable lid on top, with an opening in the center. The interior of the protective box contains multiple reflective targets. The protective assembly is located on the outside of the multi-faceted reflective target and includes a protective plate, a frustum plate, a sealing plate, and a limiting edge. The protective plate is fixedly connected to the top of the multi-faceted reflective target, the frustum plate is fixedly connected to the bottom of the multi-faceted reflective target, the sealing plate is fixedly connected to the bottom of the frustum plate, and the limiting edge is fixedly connected to the inside of the opening of the box cover. Drainage holes are provided on the inner wall of the opening of the box cover. The driving component is located below the multi-faceted reflective target and is used to move the multi-faceted reflective target up and down.

[0007] As a further description of the above technical solution: The driving components include a motor, a lead screw, a rectangular threaded cylinder, and a limit frame. The motor is fixedly connected to the bottom surface inside the protective box, the lead screw is fixedly connected to the top output end of the motor, the rectangular threaded cylinder is threadedly connected to the outside of the lead screw, the limit frame is fixedly connected to the bottom surface of the box cover, and the top end of the rectangular threaded cylinder passes through the limit frame and is fixedly connected to the bottom surface of the sealing plate.

[0008] As a further description of the above technical solution: A bearing is fixedly connected to the outer side of the top output end of the motor, and the outer wall of the bearing is fixedly connected to the inside of the protective box through a fixing bracket.

[0009] As a further description of the above technical solution: The diameters of the bottom surfaces of the protective plate and the frustum plate are the same as the diameter of the opening at the lid, while the diameter of the sealing plate is larger than the diameter of the opening at the lid.

[0010] As a further description of the above technical solution: The distance between the upper surface of the limiting edge and the upper surface of the box cover is equal to the thickness of the protective plate.

[0011] As a further description of the above technical solution: The drain hole extends through the lid.

[0012] As a further description of the above technical solution: The driving component includes a screw and an internally threaded cylinder. The screw is fixedly connected to the inner bottom surface of the protective box, and the internally threaded cylinder is threadedly connected to the outer side of the screw. The top end of the internally threaded cylinder is fixedly connected to the bottom surface of the sealing plate. The upper surface of the protective plate is provided with a hexagonal groove.

[0013] This utility model has the following beneficial effects: 1. In this utility model, the protective components can provide full enclosure protection when not in use. The protective plate completely covers the opening of the box cover and forms a double seal with the limiting edge to prevent dust and water from entering the interior of the protective box, thus avoiding contamination of the target surface or corrosion of internal components. In the working state, the drive component drives the target to rise. Through the cooperation of the frustum plate and the drainage hole, the rainwater flowing into the opening can be quickly discharged, solving the problem of water accumulation during measurement in the tunnel and improving the applicability of the target in humid environments.

[0014] 2. In this utility model, the target height can be manually adjusted by the cooperation of the screw, the internal threaded cylinder and the hexagonal groove, without the need for power support. It is suitable for scenarios such as field without power supply and mobile measurement, breaking through the limitation of power supply dependence. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall measurement reference target proposed in this utility model; Figure 2 This is a schematic diagram of a frontal cross-section of a measurement reference target proposed in this utility model; Figure 3 This is a cross-sectional view of a multifaceted reflective target for measuring reference targets proposed in this utility model after disassembly. Figure 4 This is a schematic diagram of a front cross-section of the second embodiment of the present invention.

[0016] Legend: 1. Protective box; 2. Box cover; 3. Multi-faceted reflective target; 4. Protective components; 41. Protective plate; 42. Frustum plate; 43. Sealing plate; 44. Limiting edge; 45. Drain hole; 5. Drive component; 51. Motor; 52. Lead screw; 53. Rectangular threaded cylinder; 54. Limiting bracket; 61. Bearing; 62. Fixing bracket; 71. Screw; 72. Internal threaded cylinder; 73. Hexagonal groove. Detailed Implementation

[0017] 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.

[0018] Example 1: Reference Figures 1-3 The present invention provides an embodiment of a measurement reference target, including a protective box 1, a protective component 4 and a driving component 5. A cover 2 is detachably connected to the top of the protective box 1 by bolts. The cover 2 has an opening at its center. A multi-faceted reflective target 3 is provided inside the protective box 1. The multi-faceted reflective target 3 can be raised and lowered through the opening at the center of the cover 2. The multi-faceted reflective target 3 can be illuminated by an external light source and form a significant light spot in the image.

[0019] The protective component 4 is located on the outside of the multifaceted reflective target 3 and includes a protective plate 41, a frustum plate 42, a sealing plate 43, and a limiting edge 44. The protective plate 41 is fixedly connected to the top of the multifaceted reflective target 3, and the frustum plate 42 is fixedly connected to the bottom of the multifaceted reflective target 3. The diameter of the bottom surface of the protective plate 41 and the frustum plate 42 is the same as the diameter of the opening of the cover 2. The sealing plate 43 is fixedly connected to the bottom of the frustum plate 42. When the multifaceted reflective target 3 moves, it can drive the protective plate 41, the frustum plate 42, and the sealing plate 43 to move synchronously. The diameter of the sealing plate 43 is larger than the diameter of the opening of the cover 2. The limiting edge 44 is fixedly connected to the inside of the opening of the cover 2. A drainage hole 45 is provided on the inner wall of the opening of the cover 2. The drainage hole 45 penetrates the cover 2 and is inclined downward at the end away from the opening. The distance between the upper surface of the limiting edge 44 and the upper surface of the cover 2 is the same as that between the protective plate 41 and the upper surface of the cover 2. The thickness of the protective plate 41 is equal. In the initial state, the protective plate 41 is located above the limiting edge 44 and is in contact with the upper surface of the limiting edge 44. At this time, the protective plate 41 can block the opening of the box cover 2. At the same time, the limiting edge 44 will support the protective plate 41 and improve the stability of the protective plate 41. When the sealing plate 43 moves up to be in contact with the bottom surface of the box cover 2, the frustum plate 42 enters the opening position. At this time, the bottom end of the inclined surface of the frustum plate 42 and the bottom end of the drain hole 45 are on the same horizontal plane. When the multi-faceted reflective target 3 is completely removed from the protective box 1 for operation, the frustum plate 42 enters the opening position. When water flows to the opening position, the water can flow along the inclined surface of the frustum plate 42 to the drain hole 45 and be discharged through the drain hole 45 to avoid water remaining in the opening position, which would cause water to enter the protective box 1 when the multi-faceted reflective target 3 is lowered and stored, affecting the use of the equipment.

[0020] The driving component 5 is located below the multifaceted reflective target 3 and is used to drive the multifaceted reflective target 3 to move up and down.

[0021] Reference Figures 1-3The driving component 5 includes a motor 51, a lead screw 52, ​​a rectangular threaded cylinder 53, and a limiting frame 54. The motor 51 is fixedly connected to the bottom surface inside the protective box 1. The lead screw 52 is fixedly connected to the top output end of the motor 51. When the motor 51 starts, it can drive the lead screw 52 to rotate. The rectangular threaded cylinder 53 is threadedly connected to the outside of the lead screw 52. When the lead screw 52 rotates, it can drive the rectangular threaded cylinder 53 to move synchronously. The limiting frame 54 is fixedly connected to the bottom surface of the box cover 2. The top end of the rectangular threaded cylinder 53 passes through the limiting frame 54 and is fixedly connected to the bottom surface of the sealing plate 43. The limiting frame 54 can limit the movement of the rectangular threaded cylinder 53, so that the rectangular threaded cylinder 53 can only move up and down. A bearing 61 is fixedly connected to the outside of the top output end of the motor 51. The outer wall of the bearing 61 is fixedly connected to the inside of the protective box 1 through the fixing frame 62. The fixing frame 62 and the bearing 61 can guide and limit the movement of the output end of the motor 51 to avoid deflection that would affect the use of the driving component 5.

[0022] When the motor 51 starts and drives the lead screw 52 to rotate, it can drive the rectangular threaded cylinder 53 to move up and down under the guidance and limit of the limit frame 54, and then drive the multi-faceted reflective target 3 to move up and down synchronously through the sealing plate 43.

[0023] Working principle: The multi-faceted reflective target 3 is housed inside the protective box 1, the protective component 4 is in the initial position, the protective plate 41 is attached to the upper surface of the limiting edge 44, completely blocking the opening of the box cover 2, the sealing plate 43 and the frustum plate 42 are located inside the protective box 1 along with the multi-faceted reflective target 3, the driving component 5 is in the stopped state, and the entire target is in a closed protective state to prevent external debris and water from entering the protective box 1.

[0024] When the multi-faceted reflective target 3 is needed, the motor 51 of the drive unit 5 is started, and the output end of the motor 51 drives the lead screw 52 to rotate. Because the rectangular threaded cylinder 53 is threadedly connected to the lead screw 52 and is limited by the limiting frame 54, the rotation of the lead screw 52 drives the rectangular threaded cylinder 53 to move vertically upward along the limiting frame 54. The top of the rectangular threaded cylinder 53 is fixedly connected to the sealing plate 43, which in turn drives the sealing plate 43, the frustum plate 42, the multi-faceted reflective target 3, and the protective plate 41 to move upward synchronously. As they move, the protective plate 41 gradually disengages from the limiting edge 44 and rises with the multi-faceted reflective target 3 until it is sealed. Plate 43 is attached to the bottom surface of the cover 2. At this time, the frustum plate 42 enters the opening position of the cover 2, and the multifaceted reflective target 3 is completely removed from the protective box 1 through the central opening of the cover 2. The external light source illuminates the multifaceted reflective target 3, making it form a prominent light spot in the image and enter the measurement working state. It serves as both the positioning reference of the measurement master station and an observation point of the automated monitoring system, realizing a high degree of integration between the device function and the monitoring system, improving the integration and data utilization of the entire system. If water flows to the opening, it is discharged through the inclined surface of the frustum plate 42 and the drainage hole 45, achieving waterproofing.

[0025] After the measurement is completed, the control motor 51 rotates in the reverse direction. The output end of the motor 51 drives the lead screw 52 to rotate in the reverse direction, which in turn drives the rectangular threaded cylinder 53 to move vertically downward along the limit frame 54. The rectangular threaded cylinder 53 drives the sealing plate 43, the frustum plate 42, the multi-faceted reflective target 3, and the protective plate 41 to move downward synchronously. The multi-faceted reflective target 3 gradually retracts into the protective box 1. Until the protective plate 41 is once again attached to the upper surface of the limit edge 44, completely blocking the opening of the box cover 2, the motor 51 is turned off, and the target returns to its initial stored protective state.

[0026] This device can be pre-embedded and fixed in various stable building structures inside the tunnel, including but not limited to: stable ground surface or rock mass outside the tunnel entrance or in front of the excavation face inside the tunnel; ground surface of the invert arch closure section; arch top, sidewall or sidewall, and ground surface of the secondary lining area; structural locations of other tunnel sections that have been constructed and whose deformation is stable; and specially set stable rock pillars or benchmark piers.

[0027] Example 2: Reference Figure 1 and Figure 4 The difference between Embodiment 2 and Embodiment 1 is that a different driving component 5 is used instead of Embodiment 1. The driving component 5 includes a screw 71 and an internal threaded cylinder 72. The screw 71 is fixedly connected to the bottom surface of the protective box 1, and the internal threaded cylinder 72 is threadedly connected to the outside of the screw 71. The top of the internal threaded cylinder 72 is fixedly connected to the bottom surface of the sealing plate 43. The upper surface of the protective plate 41 is provided with a hexagonal groove 73. The operator can insert a hexagonal screwdriver into the hexagonal groove 73 and then rotate the hexagonal screwdriver to drive the internal threaded cylinder 72 to rotate synchronously. At this time, with the cooperation of the screw 71, the internal threaded cylinder 72 can drive the multi-faceted reflective target 3 to move up and down, so that the operator can manually operate the device.

[0028] The beneficial effects of Example 2: It consists only of a screw 71 and an internal threaded cylinder 72, which reduces the reliance on precision and high-cost components such as motor 51, bearing 61, and fixing frame 62. The overall structure is simpler, the production and manufacturing costs are lower, and the risk of equipment failure due to electric component failure is also reduced.

[0029] Using a manual drive, the operator inserts a hexagonal screwdriver into the hexagonal slot 73 on the protective plate 41 and rotates it to drive the internal threaded cylinder 72 to rise and fall along the screw 71, thereby adjusting the position of the multi-faceted reflective target 3. This design enables it to be used normally in field measurement scenarios where there is no power supply, power failure, or inconvenience in laying power lines, breaking through the limitation of electric drive's dependence on electricity and making it more widely applicable.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A measurement reference target, characterized in that, include: A protective box (1) is provided with a detachable cover (2) on the top of the protective box (1). The cover (2) is open at the center. The interior of the protective box (1) is provided with a multi-faceted reflective target (3). The protective component (4) is disposed on the outside of the multi-faceted reflective target (3) and includes a protective plate (41), a frustum plate (42), a sealing plate (43) and a limiting edge (44). The protective plate (41) is fixedly connected to the top of the multi-faceted reflective target (3), the frustum plate (42) is fixedly connected to the bottom of the multi-faceted reflective target (3), the sealing plate (43) is fixedly connected to the bottom of the frustum plate (42), and the limiting edge (44) is fixedly connected to the inside of the opening of the cover (2). A drainage hole (45) is provided on the inner wall of the opening of the cover (2). The driving component (5) is located below the multi-faceted reflective target (3) and is used to drive the multi-faceted reflective target (3) to move up and down.

2. The measurement reference target according to claim 1, characterized in that: The driving component (5) includes a motor (51), a lead screw (52), a rectangular threaded cylinder (53), and a limiting frame (54). The motor (51) is fixedly connected to the inner bottom surface of the protective box (1). The lead screw (52) is fixedly connected to the top output end of the motor (51). The rectangular threaded cylinder (53) is threadedly connected to the outside of the lead screw (52). The limiting frame (54) is fixedly connected to the bottom surface of the box cover (2). The top end of the rectangular threaded cylinder (53) passes through the limiting frame (54) and is fixedly connected to the bottom surface of the sealing plate (43).

3. A measurement reference target according to claim 2, characterized in that: A bearing (61) is fixedly connected to the outer side of the top output end of the motor (51), and the outer wall of the bearing (61) is fixedly connected to the inside of the protective box (1) through a fixing bracket (62).

4. A measurement reference target according to claim 1, characterized in that: The diameters of the bottom surfaces of the protective plate (41) and the frustum plate (42) are the same as the diameter of the opening of the lid (2), and the diameter of the sealing plate (43) is greater than the diameter of the opening of the lid (2).

5. A measurement reference target according to claim 1, characterized in that: The distance between the upper surface of the limiting edge (44) and the upper surface of the box cover (2) is equal to the thickness of the protective plate (41).

6. A measurement reference target according to claim 1, characterized in that: The drain hole (45) penetrates the cover (2).

7. A measurement reference target according to claim 1, characterized in that: The driving component (5) includes a screw (71) and an internal threaded cylinder (72). The screw (71) is fixedly connected to the inner bottom surface of the protective box (1). The internal threaded cylinder (72) is threadedly connected to the outer side of the screw (71), and the top end of the internal threaded cylinder (72) is fixedly connected to the bottom surface of the sealing plate (43). The upper surface of the protective plate (41) is provided with a hexagonal groove (73).

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