Observation target rotatable support for tunnel visual displacement measurement

Abstract

An observation target rotatable support for tunnel visual displacement measurement comprises a camera target support, a fixing assembly is installed on the camera target support, the fixing assembly comprises a base disc, the base disc is fixedly installed on a wall surface through a plurality of expansion bolts, an L-shaped supporting rod is fixedly installed at the center of the base disc, and the L-shaped supporting rod is fixedly connected with the camera target support. According to the utility model, the multi-direction and multi-angle adjustment of the target can be realized, the measurement precision and reliability are improved, the measurement error is reduced, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel measurement, in particular to a rotatable bracket for an observation target used for tunnel visual displacement measurement. Background Art

[0002] Tunnel visual target displacement measurement technology is an advanced engineering monitoring method, mainly used for real-time deformation and displacement monitoring of tunnel structures. This technology uses computer vision systems and precise image processing algorithms to accurately measure the changes in the target's position coordinates in space by installing targets of specific geometric shapes inside or on the surface of the tunnel. During construction and operation, tunnel structures may be affected by various factors such as geological conditions, hydrological environment and engineering loads, resulting in slight deformation or displacement of the structure. Therefore, timely and accurate monitoring and evaluation of these changes are crucial to the safety and structural stability of the tunnel.

[0003] However, the traditional measurement method has the problem of insufficient accuracy in deformation monitoring in tunnels. Therefore, the utility model provides a rotatable bracket for observation targets used for visual displacement measurement in tunnels. Utility Model Content

[0004] In response to the above technical problems, the utility model discloses a rotatable bracket for an observation target for tunnel visual displacement measurement, comprising a camera target support, on which a fixing assembly is installed, the fixing assembly comprising a base disc, the base disc being fixedly mounted on a wall by a plurality of expansion bolts, an L-shaped support rod being fixedly mounted at the center of the base disc, and a circular angle dial being fixedly mounted on one end close to the L-shaped support rod, the circular angle dial being provided with a scale.

[0005] Furthermore, the camera target support includes a target support plate bracket, a sleeve is fixedly installed on the bottom end of the target support plate bracket, the sleeve is slidably connected to one end of the L-shaped support rod, the sleeve is provided with a hole with a spiral line, and a screw-in bolt matching the spiral line is provided in the hole on the sleeve. The camera target support also includes an angle measuring mechanism.

[0006] Furthermore, the angle measurement mechanism includes a target slot for placing a dual-redundant high-precision coded target for tunnel vision displacement measurement, the back of the target slot is threadedly connected with a screw-in bolt three, and the target slot is rotatably installed in the target support plate bracket.

[0007] Furthermore, the angle measuring mechanism also includes a sector-shaped angle dial, on which a scale is provided, and a pointer is fixedly mounted on the side of the target support plate bracket that matches the sector-shaped angle dial, and the pointer is in contact with the sector-shaped angle dial.

[0008] Furthermore, the camera target support also includes a second screw-in bolt threadedly installed on both sides of the target support plate bracket, and the second screw-in bolt is used to fix the sector angle dial.

[0009] Furthermore, the target card slot is made by 3D printing technology, and the internal size of the target card slot is 152mm*152mm.

[0010] Furthermore, the L-shaped support rods are all made of solid tubes made of aluminum alloy.

[0011] Furthermore, the target support plate bracket is supported by 3mm thick aluminum alloy, has a length of 170mm, a height of 90mm, a width of 30mm, and the surface is polished.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the present invention can realize multi-directional and multi-angle adjustment of the target, improve the accuracy and reliability of measurement, reduce measurement errors, and improve the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 .

[0014] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 2 .

[0015] Figure 3 This is a schematic diagram of the overall structure of the utility model Figure 3 .

[0016] Figure numbers: 1-base disc; 2-L-shaped support rod; 3-screw-in bolt 1; 4-circular angle dial; 5-target support plate bracket; 6-screw-in bolt 2; 7-pointer; 8-sector-shaped angle dial; 9-target slot; 10-screw-in bolt 3; 11-sleeve. DETAILED DESCRIPTION

[0017] Example: Figure 1-Figure 3 As shown, a rotatable bracket for an observation target for tunnel visual displacement measurement includes a camera target support, a fixing component is installed on the camera target support, and the fixing component includes a base disc 1, which is fixed to the wall by multiple expansion bolts. An L-shaped support rod 2 is fixedly installed at the center of the base disc 1, and the L-shaped support rod 2 is made of a solid tube made of aluminum alloy. A circular angle dial 4 is fixedly installed on one end close to the L-shaped support rod 2, and a scale is set on the circular angle dial 4. Through the above scheme, the circular angle dial 4 can measure the angle of rotation of the camera target support and the degree.

[0018] The camera target support includes a target support plate bracket 5, and a sleeve 11 is fixedly installed on the bottom end of the target support plate bracket 5. The sleeve 11 is slidably connected to one end of the L-shaped support rod 2. The sleeve 11 is provided with a hole with a spiral line, and a screw-in bolt 3 matching the spiral line is provided in the hole on the sleeve 11. The camera target support also includes an angle measuring mechanism. Through the above scheme, the screw-in bolt 3 tightly connects the sleeve 11 and the L-shaped support rod 2 to ensure the stability of the camera target support.

[0019] The angle measurement mechanism includes a target slot 9 for placing a dual redundant high-precision coded target for tunnel visual displacement measurement. The back of the target slot 9 is threadedly connected with a screw-in bolt 10. The target slot 9 is rotatably installed in the target support plate bracket 5. The target slot 9 is made using 3D printing technology. The internal size of the target slot 9 is 152mm*152mm. Through the above scheme, the target slot 9 can be adjusted in pitch in the target support plate bracket 5 to achieve multi-angle adjustment and increase practicality.

[0020] The angle measuring mechanism also includes a sector-shaped angle dial 8, which is provided with a scale. A pointer 7 is fixedly installed on the side where the target support plate bracket 5 matches the sector-shaped angle dial 8. The pointer 7 is in contact with the sector-shaped angle dial 8. Through the above scheme, the pointer 7 indicates the scale on the sector-shaped angle dial 8, and then the staff can accurately read the pitch angle of the target slot 9 in the target support plate bracket 5 through the degree.

[0021] The camera target support also includes a target support plate bracket 5, on both sides of which are respectively threadedly installed a screw-in bolt 2 6, which is used to fix the sector angle dial 8. The target support plate bracket 5 is supported by a 3mm thick aluminum alloy, with a length of 170mm, a height of 90mm, a width of 30mm, and a polished surface. Through the above scheme, after the target slot 9 adjusts the pitch angle, the target slot 9 is fixed by two screw-in bolts 2 6 to ensure that the target will not shake during use, thereby improving accuracy.

[0022] Working principle: The base disc 1 is fixedly installed on the tunnel wall of the potential to be observed by multiple expansion bolts, and then the sleeve 11 on the target support plate bracket 5 is inserted into one end of the L-shaped support rod 2, and then the target support plate bracket 5 is rotated. When the target support plate bracket 5 is rotated into place, the screw-in bolt 3 is tightened to fix the sleeve 11 to the L-shaped support rod 2, and the number on the circular angle dial 4 is read by screwing in the bolt 3, and the offset angle of the target support plate bracket 5 is recorded, and then the target is inserted into the target slot 9, and then the target slot 9 is pitched. When the adjustment is in place, the screw-in bolts 2 6 on both sides of the target support plate bracket 5 are tightened, and the movement of the target slot 9 is limited by screwing in the bolt 2 6, and the number on the sector angle dial 8 is read by the pointer 7, and then the pitch angle of the target slot 9 is recorded.

[0023] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to them. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A rotatable bracket for observing a target for visual displacement measurement in a tunnel, characterized in that: The invention comprises a camera target support, on which a fixing component is installed, wherein the fixing component comprises a base disc (1), wherein the base disc (1) is fixedly installed on a wall surface by means of a plurality of expansion bolts, an L-shaped support rod (2) is fixedly installed at the center of the base disc (1), and a circular angle dial (4) is fixedly installed at one end close to the L-shaped support rod (2), and a scale is arranged on the circular angle dial (4).

2. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 1, characterized in that: The camera target support comprises a target support plate support (5), a sleeve (11) is fixedly mounted on the bottom end of the target support plate support (5), the sleeve (11) is slidably connected to one end of an L-shaped support rod (2), the sleeve (11) is provided with a hole with a spiral line, a screw-in bolt (3) matching the spiral line is provided in the hole on the sleeve (11), and the camera target support also comprises an angle measuring mechanism.

3. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 2, characterized in that: The angle measurement mechanism comprises a target holder (9) for placing a dual redundant high-precision coded target for tunnel vision displacement measurement, a screw-in bolt three (10) is threadedly connected to the back of the target holder (9), and the target holder (9) is rotatably mounted in a target support plate bracket (5).

4. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 3, characterized in that: The angle measuring mechanism further comprises a sector-shaped angle dial (8), on which a scale is arranged, and a pointer (7) is fixedly mounted on the side of the target support plate bracket (5) that matches the sector-shaped angle dial (8), and the pointer (7) is in contact with the sector-shaped angle dial (8).

5. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 2, characterized in that: The camera target support also includes a second screw-in bolt (6) threadedly mounted on both sides of the target support plate bracket (5), and the second screw-in bolt (6) is used to fix the sector angle dial (8).

6. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 3, characterized in that: The target card slot (9) is manufactured using 3D printing technology, and the internal size of the target card slot (9) is 152 mm*152 mm.

7. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 1, characterized in that: The L-shaped support rods (2) are all made of solid tubes made of aluminum alloy.

8. The rotatable bracket for observing a target for visual displacement measurement in a tunnel according to claim 2, characterized in that: The target support plate bracket (5) is made of 3 mm thick aluminum alloy support, has a length of 170 mm, a height of 90 mm, a width of 30 mm, and a surface polished.

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