CN113005893A - Three-dimensional laser scanner auxiliary support and method for bridge bottom form measurement - Google Patents
Three-dimensional laser scanner auxiliary support and method for bridge bottom form measurement Download PDFInfo
- Publication number
- CN113005893A CN113005893A CN202110269326.4A CN202110269326A CN113005893A CN 113005893 A CN113005893 A CN 113005893A CN 202110269326 A CN202110269326 A CN 202110269326A CN 113005893 A CN113005893 A CN 113005893A
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- bridge
- telescopic rod
- dimensional laser
- laser scanner
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a three-dimensional laser scanner auxiliary support and a method for measuring the shape of a bridge bottom, wherein the support comprises a mobile station, a movable platform and a plurality of positioning devices, wherein the mobile station is arranged on a bridge and close to a bridge railing; the bottom end of the upright post is connected with the mobile station, the upper end of the upright post is connected with one end of a horizontal telescopic rod, and the horizontal telescopic rod can be stretched back and forth along the outer side direction of the bridge railing; the upper end of the vertical telescopic rod is connected with the outer end of the horizontal telescopic rod, the bottom end of the vertical telescopic rod is connected with the scanner placing frame, and the scanner placing frame is used for placing a three-dimensional laser scanner. The invention solves the technical problems of poor accessibility, incomplete data, low working efficiency and the like when a three-dimensional laser scanner is used for measuring the form of the bottom of the bridge.
Description
Technical Field
The invention relates to the field of engineering construction, in particular to a three-dimensional laser scanner auxiliary support and a method for bridge bottom form measurement.
Background
Three-dimensional laser scanning is a full-automatic, omnibearing and high-precision three-dimensional space form scanning and measuring technology. The technology utilizes a three-dimensional laser scanner to acquire space coordinate information of a large number of points of a bridge bottom plate, and analyzes data characteristics to identify the space form of the bridge bottom plate. At present, a three-dimensional laser scanner is used for acquiring point cloud data of a bridge bottom plate, and the method mainly comprises bridge floor or beam bottom multi-station sampling. When laser scanning is carried out on a bridge floor, scanning is difficult to directly carry out on the beam bottom, and scanning and measuring carried out by selecting a measuring station near the bridge site is easily influenced by site terrain and under-bridge redundancy, so that the technical problems of poor accessibility, incomplete data, low working efficiency and the like exist.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide an auxiliary support of a three-dimensional laser scanner for bridge bottom form measurement, which is used for solving the technical problems of poor accessibility, incomplete data, low working efficiency and the like in the conventional scanning method.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts a three-dimensional laser scanner auxiliary support for bridge bottom form measurement, and the technical scheme is as follows:
a three-dimensional laser scanner auxiliary stand for bridge beam bottom form measurement, comprising:
the mobile station is placed on the bridge close to the bridge railing;
the bottom end of the upright post is connected with the mobile station, the upper end of the upright post is connected with one end of a horizontal telescopic rod, and the horizontal telescopic rod can be stretched back and forth along the outer side direction of the bridge railing;
the upper end of the vertical telescopic rod is connected with the outer end of the horizontal telescopic rod, the bottom end of the vertical telescopic rod is connected with the scanner placing frame, and the three-dimensional laser scanner is placed on the scanner placing frame.
The horizontal telescopic rod includes:
the first horizontal hollow rod is internally provided with a first motor and a first ball screw connected with a driving shaft of the first motor along the axial direction of the first horizontal hollow rod, the first ball screw is provided with a first screw nut capable of moving back and forth along the first ball screw, the first screw nut is connected with the inner wall of a second horizontal hollow rod, and the second horizontal hollow rod is sleeved in the first horizontal hollow rod in a sliding manner;
the vertical telescopic rod comprises:
the first vertical hollow rod is internally provided with a second motor and a second ball screw connected with a driving shaft of the second motor along the axial direction of the first vertical hollow rod, the second ball screw is provided with a second screw nut capable of moving back and forth along the second ball screw, the second screw nut is connected with the inner wall of the second vertical hollow rod, and the second vertical hollow rod is sleeved in the first vertical hollow rod in a sliding manner.
The inner wall of the first horizontal hollow rod is provided with a first inner stop block, the outer wall of the second horizontal hollow rod is provided with a first outer stop block, and the first inner stop block and the first outer stop block are used for limiting the telescopic length of the horizontal telescopic rod;
the inner wall of the first vertical hollow rod is provided with a second inner stop block, the outer wall of the second vertical hollow rod is provided with a second outer stop block, and the second inner stop block and the second outer stop block are used for limiting the telescopic length of the vertical telescopic rod.
Still including setting up at the bridge railing with two at least flexible supports between the vertical telescopic link, two flexible supports with vertical telescopic link forms triangle stable structure for increase auxiliary stand's stability, every flexible support all includes:
the first connecting part is used for being fixedly connected with the bridge railing;
one end of the extension tube is connected with the first connecting part;
and the second connecting part is connected with the other end of the telescopic rod and is used for being connected with the vertical telescopic rod.
The first connecting part is a hand grip which can be fixedly connected with the bridge railing;
the second connecting portion are magnet pieces which can be adsorbed on the vertical telescopic rod.
A cavity for filling a heavy object is formed in the mobile platform, and a self-locking roller is arranged at the bottom end of the mobile platform.
The weight is a concrete block or a metal block.
And an inclined strut is arranged between the mobile station and the upright post.
The scanner rack includes: the top of the herringbone connecting rod is connected with the bottom end of the vertical telescopic rod through a connecting hole; the circular pedestal is welded with the herringbone connecting rod, and the scanner is placed and fixed on the circular pedestal.
A bridge bottom shape measurement method is based on the three-dimensional laser scanner auxiliary support for bridge bottom shape measurement,
moving the auxiliary support on the bridge through the mobile station until the auxiliary support reaches a position on the bridge to be detected and then stopping the auxiliary support;
the three-dimensional laser scanner is freely moved below the bottom of the bridge beam by adjusting the horizontal telescopic rod and the vertical telescopic rod;
and opening the three-dimensional laser scanner, and realizing the scanning work of the bottom of the bridge to be detected by rotating the angle of the three-dimensional laser scanner.
The invention has the beneficial effects that:
compared with the prior art, the three-dimensional laser scanner can be safely and stably conveyed to the bottom of a beam by arranging the mobile station, the upright post, the horizontal telescopic rod and the vertical telescopic rod, so that the form of a bottom plate of the bridge can be quickly and accurately scanned, and the test accessibility, the data integrity and the working efficiency of the three-dimensional laser scanner are greatly improved.
In order to ensure the stability of the three-dimensional laser scanner during working, a telescopic support is arranged between the bridge railing and the vertical telescopic rod, and the telescopic support and the vertical telescopic rod form a triangular stable structure.
Thirdly, in order to further ensure the stability of the whole auxiliary bracket, a cavity for filling heavy objects is arranged in the mobile platform, and the cavity is filled with heavy objects with different weights according to requirements.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken at 4-4 of FIG. 1;
FIG. 3 is a top view of the present invention;
FIG. 4 is a cross-sectional view taken along line 1-1 of FIG. 1 in accordance with the present invention;
FIG. 5 is a schematic view of the inside of the telescoping pole of the present invention, with the side outer walls of the telescoping poles hidden;
FIG. 6 is an enlarged schematic view at A of FIG. 5 of the present invention;
FIG. 7 is an enlarged schematic view at B of FIG. 5 of the present invention;
FIG. 8 is a detail view at C of FIG. 5;
FIG. 9 is a detail view at D of FIG. 5;
FIG. 10 is a schematic view of the construction of the telescoping support of the present invention;
list of reference numerals:
1-a moving platform, 2-an upright post, 3-a first motor, 4-a first connecting piece, 5-a first ball screw, 6-a first screw nut, 7-a horizontal telescopic rod, 8-a second motor, 9-a second connecting piece, 10-a second ball screw, 11-a second screw nut, 12-a vertical telescopic rod, 13-a scanner placing rack and 14-a telescopic support, 15-inclined strut, 16-self-locking wheel, 17-first inner stop block, 19-first outer stop block, 20-second inner stop block, 22-second outer stop block, 23-connecting hole, 24-herringbone connecting rod, 25-circular pedestal, 26-gripper, 27-magnet sheet, 28-telescopic tube and 29-scanner fixing nut.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 10, a three-dimensional laser scanner auxiliary support for bridge bottom form measurement includes a mobile station 1, an upright column 2, a first motor 3, a first connecting piece 4, a first ball screw 5, a first screw nut 6, a horizontal telescopic rod 7, a second motor 8, a second connecting piece 9, a second ball screw 10, a second screw nut 11, a vertical telescopic rod 12, a scanner placing frame 13, a telescopic support 14, and an inclined support 15.
The invention provides a specific embodiment of an auxiliary bracket of a three-dimensional laser scanner for bridge bottom form measurement.
The main body of the mobile station 1 is a steel shell and is filled with concrete blocks, so that the self weight is increased, and the overall overturn resistance of the support is improved. The four corners of the bottom of the mobile station 1 are each provided with a self-locking wheel 16 (the other two wheels are not shown for reasons of view), which can roll freely when the stand is moved and can be locked in operation.
The column 2 is welded to the centre of the block and is supported by four braces 15 to maintain stability.
The horizontal part of the horizontal telescopic rod 7 is connected with the horizontal part of the upright post 2. The vertical telescopic rod 12 is connected with the vertical part of the horizontal telescopic rod 7.
The scanner rack 13 is composed of a herringbone connecting rod 24 and a circular pedestal 25. The top of the herringbone connecting rod 24 is connected with the vertical telescopic rod 12 through the connecting hole 23; the circular pedestal 25 is welded with the herringbone connecting rod 24 and used for placing and fixing the scanner.
Further, please refer to fig. 5, which is a specific embodiment of the three-dimensional laser scanner auxiliary bracket for bridge bottom form measurement according to the present invention.
In this embodiment, the column 2 is L-shaped, and has a rectangular cross section. The vertical part of the upright post 2 is solid, so that the self weight is increased and the stability of the bracket is improved. The horizontal part of the upright post 2 is hollow and is used for placing a first motor 3, a first connecting piece 4, a first ball screw 5 and a first screw nut 6. The horizontal telescopic rod 7 is L-shaped, the section form is hollow rectangle, the section size of the horizontal part of the horizontal telescopic rod 7 is smaller than that of the horizontal part of the upright post 2, and the horizontal part can move in the horizontal part of the upright post 2;
the vertical telescopic rod 12 is 1-shaped, the cross section of the vertical telescopic rod is a hollow rectangle, the cross section size of the vertical telescopic rod is smaller than that of the vertical part of the horizontal telescopic rod 7, and the vertical telescopic rod can move in the vertical part of the horizontal telescopic rod 7.
Further, referring to fig. 6, the horizontal portion of the upright post 2 is provided with first inner stoppers 17 near the upper and lower surfaces of the horizontal portion, the horizontal portion of the horizontal rod 7 is provided with first outer stoppers 19 near the upper and lower surfaces of the horizontal portion, and the horizontal rod 7 is prevented from being separated when reaching the maximum extension length by the mutual limiting action of the first inner stoppers 17 and the first outer stoppers 19.
The enlarged schematic view of the second inner stop 20, the second circular hole 21, the second outer stop 22 and the second ball screw 10 at C in fig. 5 is the same as that shown in fig. 8.
Further, referring to fig. 7, the first motor 3 is fixed on the innermost inner wall of the horizontal portion of the upright post 2, and the output shaft thereof passes through the first connecting member 4 to be connected with the first ball screw 5; the first ball screw 5 is provided with a first screw nut 6. The enlarged schematic view of the second motor, the second connecting member, and the second ball screw 10 at D in fig. 5 is the same as that shown in fig. 9.
Further, please refer to fig. 1 and 10, the three-dimensional laser scanner further includes at least two telescopic supports 14, the two telescopic supports 14 are disposed between the bridge railing and the vertical telescopic rod 12, the two telescopic supports 14 and the vertical telescopic rod 12 form a triangular stable structure for increasing the stability of the auxiliary bracket when the three-dimensional laser scanner rotates, and one end of each telescopic support 14 is a hand grip 26 which can be fixed to the bridge railing; the other end is provided with a magnet piece 27 which can be adsorbed on the telescopic rod of the bracket. The body is a telescopic tube 28, preferably a threaded telescopic tube, the length of which is adjusted by rotation.
The invention relates to a three-dimensional laser scanner auxiliary support for bridge bottom form measurement, which can freely move the whole support to any position suitable for measurement on a bridge floor through a mobile station.
Drive first ball screw and second ball screw rotation respectively through first motor and second motor, realize first screw-nut and second screw-nut and move on its place ball screw, and then promote the both-way movement of horizontal telescopic link and vertical telescopic link level and vertical direction, remove three-dimensional laser scanner below the bridge beam bottom, finally realize that it reachs bridge bottom plate best scanning position, improved and measured reachability, scan data integrality and work efficiency. Simultaneously, flexible support is fixed in between bridge railing and the support, guarantees the stability of auxiliary stand at the scanner during operation.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A three-dimensional laser scanner auxiliary stand for bridge beam bottom form measurement, characterized by comprising:
the mobile station is placed on the bridge close to the bridge railing;
the bottom end of the upright post is connected with the mobile station, the upper end of the upright post is connected with one end of a horizontal telescopic rod, and the horizontal telescopic rod can be stretched back and forth along the outer side direction of the bridge railing;
the upper end of the vertical telescopic rod is connected with the outer end of the horizontal telescopic rod, the bottom end of the vertical telescopic rod is connected with the scanner placing frame, and the three-dimensional laser scanner is placed on the scanner placing frame.
2. The three-dimensional laser scanner auxiliary support for bridge beam bottom form measurement as claimed in claim 1, wherein the horizontal telescopic rod comprises:
the first horizontal hollow rod is internally provided with a first motor and a first ball screw connected with a driving shaft of the first motor along the axial direction of the first horizontal hollow rod, the first ball screw is provided with a first screw nut capable of moving back and forth along the first ball screw, the first screw nut is connected with the inner wall of a second horizontal hollow rod, and the second horizontal hollow rod is sleeved in the first horizontal hollow rod in a sliding manner;
the vertical telescopic rod comprises:
the first vertical hollow rod is internally provided with a second motor and a second ball screw connected with a driving shaft of the second motor along the axial direction of the first vertical hollow rod, the second ball screw is provided with a second screw nut capable of moving back and forth along the second ball screw, the second screw nut is connected with the inner wall of the second vertical hollow rod, and the second vertical hollow rod is sleeved in the first vertical hollow rod in a sliding manner.
3. The three-dimensional laser scanner auxiliary bracket for measuring the shape of the bottom of a bridge beam as claimed in claim 2, wherein a first inner stop is arranged on the inner wall of the first horizontal hollow rod, a first outer stop is arranged on the outer wall of the second horizontal hollow rod, and the first inner stop and the first outer stop are used for limiting the telescopic length of the horizontal telescopic rod;
the inner wall of the first vertical hollow rod is provided with a second inner stop block, the outer wall of the second vertical hollow rod is provided with a second outer stop block, and the second inner stop block and the second outer stop block are used for limiting the telescopic length of the vertical telescopic rod.
4. The three-dimensional laser scanner auxiliary stand for bridge beam bottom form measurement according to claim 1, further comprising at least two telescopic supports disposed between the bridge railing and the vertical telescopic rod, wherein the two telescopic supports and the vertical telescopic rod form a triangular stable structure for increasing the stability of the auxiliary stand, and each telescopic support comprises:
the first connecting part is used for being fixedly connected with the bridge railing;
one end of the extension tube is connected with the first connecting part;
and the second connecting part is connected with the other end of the telescopic rod and is used for being connected with the vertical telescopic rod.
5. The three-dimensional laser scanner auxiliary support for bridge bottom shape measurement according to claim 4, wherein the first connecting portion is a hand grip which can be fixedly connected with a bridge rail;
the second connecting portion are magnet pieces which can be adsorbed on the vertical telescopic rod.
6. The three-dimensional laser scanner auxiliary support for measuring the shape of the bottom of a bridge beam as claimed in claim 1, wherein a cavity for filling heavy objects is arranged in the moving platform, and a self-locking roller is arranged at the bottom end of the moving platform.
7. The three-dimensional laser scanner auxiliary stand for bridge bottom form measurement according to claim 6, wherein the weight is a concrete block or a metal block.
8. The three-dimensional laser scanner auxiliary support for measuring the shape of the bottom of a bridge beam as claimed in claim 1, wherein a diagonal brace is arranged between the mobile station and the upright.
9. The three-dimensional laser scanner auxiliary support for bridge bottom form measurement according to claim 1, wherein: the scanner rack includes: the top of the herringbone connecting rod is connected with the bottom end of the vertical telescopic rod through a connecting hole; the circular pedestal is welded with the herringbone connecting rod, and the scanner is placed and fixed on the circular pedestal.
10. A bridge bottom shape measurement method based on the three-dimensional laser scanner auxiliary support for bridge bottom shape measurement as claimed in any one of claims 1 to 9,
moving the auxiliary support on the bridge through the mobile station until the auxiliary support reaches a position on the bridge to be detected and then stopping the auxiliary support;
the three-dimensional laser scanner is freely moved below the bottom of the bridge beam by adjusting the horizontal telescopic rod and the vertical telescopic rod;
and opening the three-dimensional laser scanner, and realizing the scanning work of the bottom of the bridge to be detected by rotating the angle of the three-dimensional laser scanner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110269326.4A CN113005893B (en) | 2021-03-12 | 2021-03-12 | Three-dimensional laser scanner auxiliary support and method for bridge bottom form measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110269326.4A CN113005893B (en) | 2021-03-12 | 2021-03-12 | Three-dimensional laser scanner auxiliary support and method for bridge bottom form measurement |
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| CN113005893A true CN113005893A (en) | 2021-06-22 |
| CN113005893B CN113005893B (en) | 2022-11-29 |
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| CN202110269326.4A Active CN113005893B (en) | 2021-03-12 | 2021-03-12 | Three-dimensional laser scanner auxiliary support and method for bridge bottom form measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114525729A (en) * | 2021-12-17 | 2022-05-24 | 东南大学 | Auxiliary mark belt laying vehicle for large-span bridge form laser scanning |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03260205A (en) * | 1990-03-09 | 1991-11-20 | Shiyuto Kosoku Doro Gijutsu Center | Apparatus for inspecting elevated bridge |
| CN107524570A (en) * | 2017-08-31 | 2017-12-29 | 巢湖学院 | One kind is used for ground large wind power generating set column |
| CN207294774U (en) * | 2017-09-01 | 2018-05-01 | 塔里木大学 | A kind of sampling frame for environment microbe |
| CN209372620U (en) * | 2019-01-22 | 2019-09-10 | 揭阳市少记科技有限公司 | A kind of non-woven fabrics water absorber |
| CN210458938U (en) * | 2019-07-23 | 2020-05-05 | 广东宏骏建筑工程有限公司 | Bridge safety detection device |
| CN111610192A (en) * | 2020-05-12 | 2020-09-01 | 广东中林建筑园林工程有限公司 | Bridge overhauls with bridge gap check out test set that has degree of depth structure |
| CN111979911A (en) * | 2020-09-15 | 2020-11-24 | 湖南联智科技股份有限公司 | Bridge check out test set |
-
2021
- 2021-03-12 CN CN202110269326.4A patent/CN113005893B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03260205A (en) * | 1990-03-09 | 1991-11-20 | Shiyuto Kosoku Doro Gijutsu Center | Apparatus for inspecting elevated bridge |
| CN107524570A (en) * | 2017-08-31 | 2017-12-29 | 巢湖学院 | One kind is used for ground large wind power generating set column |
| CN207294774U (en) * | 2017-09-01 | 2018-05-01 | 塔里木大学 | A kind of sampling frame for environment microbe |
| CN209372620U (en) * | 2019-01-22 | 2019-09-10 | 揭阳市少记科技有限公司 | A kind of non-woven fabrics water absorber |
| CN210458938U (en) * | 2019-07-23 | 2020-05-05 | 广东宏骏建筑工程有限公司 | Bridge safety detection device |
| CN111610192A (en) * | 2020-05-12 | 2020-09-01 | 广东中林建筑园林工程有限公司 | Bridge overhauls with bridge gap check out test set that has degree of depth structure |
| CN111979911A (en) * | 2020-09-15 | 2020-11-24 | 湖南联智科技股份有限公司 | Bridge check out test set |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114525729A (en) * | 2021-12-17 | 2022-05-24 | 东南大学 | Auxiliary mark belt laying vehicle for large-span bridge form laser scanning |
| CN114525729B (en) * | 2021-12-17 | 2022-11-04 | 东南大学 | Auxiliary mark belt laying vehicle for large-span bridge form laser scanning |
| US11827000B2 (en) | 2021-12-17 | 2023-11-28 | Southeast University | Auxiliary marking tape laying vehicle for laser scanning of the morphology of long-span bridge |
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| CN113005893B (en) | 2022-11-29 |
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