Forced centering target measurement device

Abstract

The utility model belongs to the technical field of engineering measurement, and particularly relates to a forced centering target measurement device. Comprising a pre-embedded adapter and a prism assembly. A reserved jack is formed in the pre-embedded adapter, the pre-embedded adapter is used for being fixed to the surface of a structural object, and an orifice of the reserved jack is exposed; the prism assembly comprises a positioning insertion rod, a prism frame and a reflecting prism, the positioning insertion rod is fixedly connected with the prism frame, the positioning insertion rod can be inserted into a reserved insertion hole of the embedded adapter and is kept fixed after being inserted, the reflecting prism is installed in the prism frame through a rotating shaft, and the rotating shaft is perpendicular to the positioning insertion rod; according to the forced centering target measurement device provided by the utility model, the embedded adapter is embedded or implanted in the surface of the structure, the prism assembly is arranged on the embedded adapter during measurement and use each time, and the prism assembly is taken down after measurement, so that extra space occupation of a narrow operation space is avoided, and the stability can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering measurement, and in particular relates to a forced centering measurement target device. Background Art

[0002] The placement of measurement control points within a tunnel is a crucial step in tunnel construction, and their correctness and accuracy directly impact the safety and quality of tunnel construction. The difficulties in placing control points primarily include ensuring their stability and accuracy, and effectively addressing the complex environment within the tunnel. First, ensuring the stability of the control points is crucial. Due to vibration and deformation during tunnel construction, control points may move or deform, affecting measurement accuracy. Improving measurement accuracy also requires addressing the complex environment within the tunnel, including insufficient light and low visibility. Furthermore, addressing the complex environment within the tunnel requires considering spatial layout and operational space when placing measurement control points, as tunnel space is limited.

[0003] Conventional control point layout includes burying inverted arch filling surfaces, setting up mandatory observation piers, and installing mandatory observation frames on tunnel side walls and roofs, each of which is suitable for different operating scenarios. In tunnel excavation and layout, due to the complex operating environment, the conventional station setting method often requires the measurement and setting of multiple temporary turning points, making it difficult to ensure operational accuracy and efficiency. The use of rear intersection station setting for tunnel excavation and layout is more widely used. In order to prevent the station control points from being damaged, steel nails are often used to lay the control points on the primary support near the excavation surface. The total station is aimed at the center of the steel nails, and the edge-angle relationship of the steel nails is measured using the prism-free mode. This solves the problems of station setting efficiency and control point damage, but at the same time, the measurement accuracy will be affected by the accuracy of the control point identification and the accuracy of the measurement mode. Especially in the process of corner intersection measurement, there are problems such as high purchase cost of observation targets, frequent damage in confined areas, low efficiency of observation target centering and leveling, and poor consistency of centering and leveling. Utility Model Content

[0004] The utility model aims to solve the problems of high purchase cost of observation targets, frequent destruction of narrow spaces, low efficiency of centering and leveling of observation targets, and poor consistency of centering and leveling during the corner intersection measurement process.

[0005] The utility model provides the following technical solutions: a forced centering measurement target device, comprising a pre-embedded adapter and a prism assembly; the pre-embedded adapter is provided with a reserved socket, the pre-embedded adapter is used to be fixed on the surface of the structure, and the opening of the reserved socket is exposed;

[0006] The prism assembly includes a positioning rod, a prism frame and a reflecting prism. The positioning rod is fixedly connected to the prism frame. The positioning rod can be inserted into the reserved socket of the embedded adapter and remains fixed after insertion. The reflecting prism is installed in the prism frame through a rotating axis, and the rotating axis is perpendicular to the positioning rod.

[0007] Furthermore, a limiting structure is provided between the positioning rod and the embedded adapter along the depth direction of the reserved insertion hole;

[0008] The reserved socket is a round hole, and the positioning rod is a cylindrical rod;

[0009] The limiting structure includes a limiting port arranged at the opening of the reserved socket and a limiting boss arranged on the positioning rod. The limiting boss stops at the limiting port to limit the insertion depth of the positioning rod. The concave-convex matching structure between the bottom surface of the limiting boss and the top surface of the limiting port limits the angle of the reflecting prism relative to the embedded adapter.

[0010] Furthermore, the positioning rod is transitionally matched with the reserved socket.

[0011] Furthermore, the outer wall of the embedded adapter is provided with a laterally protruding anti-pullout structure.

[0012] Furthermore, a reflective mark is provided on the prism frame at the top, bottom, left and right of the reflective prism.

[0013] Furthermore, the anti-pullout structure is a convex ring embedded in the outer wall of the adapter.

[0014] Furthermore, it also includes a protective cover, which is connected to the embedded adapter and is used to close the opening of the reserved socket after the prism assembly is removed.

[0015] Furthermore, the bottom surface of the limiting boss is provided with teeth distributed in a circular array with the positioning rod as the center, the top surface of the limiting port is provided with tooth grooves that engage with the teeth, the side of the limiting port is provided with an indicator line, and the side of the limiting boss is provided with a scale.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] The utility model provides a forced centering measurement target device, which embeds or implants an embedded adapter on the surface of a structure. Each time a measurement is made and used, the prism assembly is installed on the embedded adapter. After the measurement, the prism assembly is removed without causing additional space occupation in the narrow working space, and stability can be guaranteed. At the same time, the processing error of the embedded adapter and the prism assembly must be less than 0.05mm. The reserved sockets and limit ports on the embedded adapter are paired with the positioning rods and limit bosses on the prism assembly for installation, while limiting the displacement in all directions, so that the center of the prism is in the same position each time the prism assembly is installed, achieving consistency in the measurement results. It is suitable for various types of corner intersection control network measurements, deformation monitoring measurements, reference point use and observation point use for bridges, tunnels, roadbeds, building construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the installation of the forced centering measurement target device;

[0019] Figure 2 is a front view of the prism assembly;

[0020] Figure 3 is a bottom view of the prism assembly;

[0021] Figure 4 This is the front view of the embedded adapter;

[0022] Figure 5 This is a top view of the embedded adapter.

[0023] In the figure: 1-embedded adapter; 1.1-reserved socket; 1.2-limit port; 1.3-pull-out resistance structure; 1.4-indicator line; 1.5-tooth groove; 2-positioning rod; 2.1-limiting boss; 2.2-teeth; 2.3-scale; 3-prism frame; 4-reflective prism; 5-rotation axis; 6-reflective mark; 7-protective cover; 8-structure. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] like Figure 1 、 Figure 2 、 Figure 4Shown: A forced centering measurement target device includes a pre-buried adapter 1 and a prism assembly; the pre-buried adapter 1 is provided with a reserved socket 1.1, the pre-buried adapter 1 is used to be fixed on the surface of the structure, and the opening of the reserved socket 1.1 is exposed.

[0026] The prism assembly includes a positioning rod 2, a prism frame 3, and a reflective prism 4. The positioning rod 2 is fixedly connected to the prism frame 3 and can be inserted into the reserved socket 1.1 of the embedded adapter 1 and remains fixed after insertion. The reflective prism 4 is made of glass with a plastic frame. The cross-section of the reflective prism 4 is an isosceles right triangle and uses the laws of reflection and refraction of light. The reflective prism 4 receives the light signal from the total station and reflects it back. The total station uses an algorithm to determine the distance and angle between the instrument and the target. The reflective prism 4 is mounted in the prism frame 3 via a rotation axis 5, which is perpendicular to the positioning rod 2.

[0027] The positioning rod 2 is seamlessly integrated with the pre-installed socket 1.1. Once inserted, the positioning rod 2 remains stable and the two components remain aligned. A limit stop is provided between the positioning rod 2 and the embedded adapter 1 along the depth of the pre-installed socket 1.1. The pre-installed socket 1.1 is a circular hole, while the positioning rod 2 is a cylindrical rod.

[0028] like Figure 3 、 Figure 5 As shown: the limiting structure includes a limiting port 1.2 arranged at the opening of the reserved socket 1.1 and a limiting boss 2.1 arranged on the positioning rod 2. The limiting boss 2.1 stops at the limiting port 1.2 to limit the insertion depth of the positioning rod 2. The concave-convex matching structure between the bottom surface of the limiting boss 2.1 and the top surface of the limiting port 1.2 limits the angle of the reflecting prism 4 relative to the embedded adapter 1.

[0029] The reflective prism 4 can be rotated and fixed relative to the embedded adapter 1 at multiple angles, allowing for precise adjustment of the measurement angle. The bottom surface of the position-limiting boss 2.1 is provided with teeth 2.2 arranged in a circular array centered on the positioning rod 2. The top surface of the position-limiting port 1.2 is provided with tooth grooves 1.5 that engage with the teeth 2.2. An indicator line 1.4 is provided on the side of the position-limiting port 1.2, and a scale 2.3 is provided on the side of the position-limiting boss 2.1. The indicator line 1.4 aligns with the corresponding scale 2.3 to mark the angle of the reflective prism 4.

[0030] The outer wall of the embedded adapter 1 is provided with a transversely protruding anti-pullout structure 1.3. This structure is used to strengthen the connection between the embedded adapter 1 and the structure 8. The anti-pullout structure 1.3 is integrally formed with the embedded adapter 1. The embedded adapter 1 is manufactured from high-strength stainless steel, which resists wear and deformation and ensures the consistency of the embedded adapter 1 after installation.

[0031] Specifically, the anti-pullout structure 1 . 3 is a convex ring embedded in the outer wall of the adapter 1 .

[0032] A reflective mark 6 is provided on the prism frame 3 at the top, bottom, left and right of the reflective prism 4 for quickly finding the reflective prism 4 when working in a dark place.

[0033] The device also includes a protective cover 7, which is made of plastic and is connected to the embedded adapter 1. After the prism assembly is removed, it is used to close the opening of the reserved socket 1.1. The protective cover 7 includes a plug and a cover plate. The plug of the protective cover 7 is inserted into the reserved socket 1.1, and the cover plate is stopped at the limit port 1.2.

[0034] During use, the embedded adapter 1 is installed on the surface of the structure 8 by embedding or implanting. After the embedded adapter 1 is stable, the prism assembly is installed on the embedded adapter 1 for measurement and use. After the measurement is completed, the prism assembly is removed and the protective cover 7 is installed to prevent dust from entering the reserved socket 1.1.

[0035] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A forced centering measurement target device, characterized by: The pre-embedded adapter (1) comprises a pre-embedded adapter (1) and a prism assembly; a reserved socket (1.1) is provided on the pre-embedded adapter (1); the pre-embedded adapter (1) is used to be fixed on the surface of a structure, and the opening of the reserved socket (1.1) is exposed; The prism assembly comprises a positioning rod (2), a prism frame (3) and a reflecting prism (4); the positioning rod (2) is fixedly connected to the prism frame (3); the positioning rod (2) can be inserted into a reserved socket (1.1) of a pre-buried adapter (1) and remains fixed after insertion; the reflecting prism (4) is installed in the prism frame (3) via a rotating shaft (5); and the rotating shaft (5) is perpendicular to the positioning rod (2).

2. The device for forced centering measurement of a target according to claim 1, characterized in that: Along the depth direction of the reserved socket (1.1), a limiting structure is provided between the positioning rod (2) and the embedded adapter (1); The reserved socket (1.1) is a round hole, and the positioning rod (2) is a cylindrical rod; The limiting structure comprises a limiting port (1.2) provided at the opening of the reserved insertion hole (1.1) and a limiting boss (2.1) provided on the positioning plug rod (2); the limiting boss (2.1) stops at the limiting port (1.2) to limit the insertion depth of the positioning plug rod (2); and a concave-convex matching structure between the bottom surface of the limiting boss (2.1) and the top surface of the limiting port (1.2) limits the angle of the reflective prism (4) relative to the embedded adapter (1).

3. The device for forced centering measurement of a target according to claim 2, characterized in that: The positioning rod (2) is transitionally matched with the reserved socket (1.1).

4. A forced centering measurement target device according to any one of claims 1 to 3, characterized in that: The outer wall of the embedded adapter (1) is provided with a transversely protruding anti-pullout structure (1.3).

5. The device for forced centering measurement of a target according to claim 4, characterized in that: A reflective mark (6) is provided on the prism frame (3) at the top, bottom, left and right of the reflective prism (4).

6. The device for forced centering measurement of a target according to claim 4, characterized in that: The anti-pullout structure (1.3) is a convex ring embedded in the outer wall of the adapter (1).

7. The device for forced centering measurement of a target according to claim 4, characterized in that: It also includes a protective cover (7), which is connected to the embedded adapter (1) and is used to close the opening of the reserved socket (1.1) after the prism assembly is removed.

8. The device for forced centering measurement of a target according to claim 2, characterized in that: The bottom surface of the limiting boss (2.1) is provided with teeth (2.2) distributed in a ring array with the positioning rod (2) as the center, the top surface of the limiting port (1.2) is provided with tooth grooves (1.5) engaged with the teeth (2.2), the side surface of the limiting port (1.2) is provided with an indicator line (1.4), and the side surface of the limiting boss (2.1) is provided with a scale (2.3).

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