CN112414327B - Handheld concrete roughness three-dimensional detection device and method - Google Patents
Handheld concrete roughness three-dimensional detection device and method Download PDFInfo
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- CN112414327B CN112414327B CN202011290072.6A CN202011290072A CN112414327B CN 112414327 B CN112414327 B CN 112414327B CN 202011290072 A CN202011290072 A CN 202011290072A CN 112414327 B CN112414327 B CN 112414327B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
Abstract
The invention provides a hand-held concrete roughness three-dimensional detection device and a method, comprising a camera mounting plate, wherein a first camera component and a second camera component are symmetrically and fixedly mounted on the bottom end surface of the camera mounting plate, a laser used for positioning is fixed at the position between the first camera component and the second camera component, and the camera mounting plate is connected with a hand-held structure through a connecting plate; the device also comprises a calibration plate used for positioning the scanning position, wherein the calibration plate is matched with the first camera assembly, the second camera assembly and the laser, and the three-dimensional scanning of the concrete surface of the set area is realized. The detection device digitizes the rough condition of the concrete by three-dimensional laser scanning, and then obtains three-dimensional point cloud data of the concrete surface, and then calculates to obtain the roughness of the concrete surface, thereby achieving the purpose of accurately measuring the roughness of the concrete surface.
Description
Technical Field
The invention relates to the field of concrete surface quality detection devices, in particular to a handheld concrete roughness three-dimensional detection device and method.
Background
The existing concrete surface roughness detection mainly adopts a sand filling method or a sand paving method, fine sand is used for filling the highest point of a unit area region or paving the whole measuring region, and finally, the roughness is calculated according to the sand volume.
The measurement method has a relatively complex operation process, and the measurement precision cannot be well guaranteed.
Disclosure of Invention
The invention provides a handheld three-dimensional detection device and a method for concrete roughness, aiming at overcoming the defects of the prior art.
In order to achieve the technical features, the invention is realized as follows: a hand-held concrete roughness three-dimensional detection device comprises a camera mounting plate, wherein a first camera component and a second camera component are symmetrically and fixedly mounted on the bottom end surface of the camera mounting plate, a laser used for positioning is fixed between the first camera component and the second camera component, and the camera mounting plate is connected with a hand-held structure through a connecting plate;
the device also comprises a calibration plate used for positioning the scanning position, wherein the calibration plate is matched with the first camera assembly, the second camera assembly and the laser, and the three-dimensional scanning of the concrete surface of the set area is realized.
The handheld structure comprises a handle mounting plate, the handle mounting plate is fixed to the top of the connecting plate, a handheld long rod is fixed to the top end of the handle mounting plate, and a handle is fixed to the top of the handheld long rod.
The camera mounting plate is fixedly connected with the connecting plate through a plurality of first bolts, and through holes for penetrating the first bolts are processed in the connecting plate.
The handle mounting plate is fixedly connected with the connecting plate through a second bolt.
The calibration plate is a rectangular plate, a rectangular area is processed in the center of the calibration plate, a plurality of mark points are arranged on the periphery of the rectangular area, and the annular area outside the mark points is filled with black.
The method for detecting the concrete roughness by using the handheld three-dimensional concrete roughness detection device comprises the following steps:
the method comprises the following steps: cleaning sundries on the surface of the concrete to be detected, selecting a proper detection area, placing the calibration plate in the selected area, flatly placing and fixing the calibration plate in the area;
step two: the handle is held by hand, and the detection device is moved to the rectangular area of the calibration plate for scanning to obtain three-dimensional point cloud data of the concrete surface;
step three: and calculating the roughness of the point cloud data by adopting a plane expansion rate calculation method according to the three-dimensional point cloud data.
And in the scanning process adopted in the second step, a planar single-chip scanning method is adopted to obtain point cloud data or a plurality of pieces of scanning are completed by utilizing the mark points in the calibration plate to obtain the point cloud data.
The concrete calculation method in the third step is that the three-dimensional outer contour of the selected area is fitted according to the three-dimensional point cloud data, the surface area S1 of the measured concrete is calculated and solved according to the three-dimensional outer contour, the area of the selected standard rectangular area is S2, and the calculation formula of the concrete roughness h is as follows: h = S1/S2.
The invention has the following beneficial effects:
1. the method has the advantages that the high-precision three-dimensional scanning technology is adopted, the concrete surface of the fixed area is rapidly scanned, high-precision point cloud data are obtained, the roughness result is obtained through point cloud data calculation, the equipment portability is high, the method is convenient, rapid, efficient and accurate, and field measurement and inclined plane measurement can be carried out.
2. Through foretell handheld structure can make things convenient for survey crew handheld device, and then detect the concrete surface.
3. The fixing reliability of the camera mounting plate is ensured through the connection mode.
4. The connection mode ensures the fixing reliability of the handheld structure.
5. Through the mark points, the purpose of positioning is guaranteed in the shooting and scanning process, and the repeated positioning precision in the scanning process is further guaranteed.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a diagram of a detection apparatus according to the present invention.
Fig. 2 is a layout diagram of the camera assembly of the detection device of the invention.
FIG. 3 is a top view of the calibration plate of the present invention.
In the figure: the camera comprises a handle 1, a handheld long rod 2, a first bolt 3, a connecting plate 4, a second bolt 5, a handle mounting plate 6, a through hole 7, a camera mounting plate 8, a first camera assembly 9, a laser 10, a second camera assembly 11, a calibration plate 12, a mark point 13, a rectangular area 14 and an annular area 15.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-3, a hand-held concrete roughness three-dimensional detection device comprises a camera mounting plate 8, wherein a first camera assembly 9 and a second camera assembly 11 are symmetrically and fixedly mounted on the bottom end surface of the camera mounting plate 8, a laser 10 for positioning is fixed between the first camera assembly 9 and the second camera assembly 11, and the camera mounting plate 8 is connected with a hand-held structure through a connecting plate 4; the device also comprises a calibration plate 12 used for positioning a scanning position, wherein the calibration plate 12 is matched with the first camera assembly 9, the second camera assembly 11 and the laser 10, and realizes three-dimensional scanning of the concrete surface of the set area. The detection device with the structure can be used for detecting the roughness of the surface of the concrete, the three-dimensional point cloud data of the surface of the concrete is obtained, the surface area of the concrete is obtained according to the three-dimensional point cloud data in a fitting mode, and finally the roughness of the surface of the concrete is obtained through a calculation formula.
Further, handheld structure includes handle mounting panel 6, handle mounting panel 6 is fixed at the top of connecting plate 4, the top of handle mounting panel 6 is fixed with handheld stock 2, the top of handheld stock 2 is fixed with handle 1. Through foretell handheld structure can make things convenient for survey crew handheld device, and then detect the concrete surface.
Further, the camera mounting plate 8 is fixedly connected with the connecting plate 4 through a plurality of first bolts 3, and through holes 7 for passing through the first bolts 3 are processed on the connecting plate 4. The reliability of fixing the camera mounting plate 8 is ensured by the connection mode.
Further, the handle mounting plate 6 is fixedly connected with the connecting plate 4 through a second bolt 5. The connection mode ensures the fixing reliability of the handheld structure.
Further, the calibration plate 12 is a rectangular plate, a rectangular area 14 is processed at the central position of the calibration plate 12, a plurality of mark points 13 are arranged on the periphery of the rectangular area 14, and the annular areas 15 except the mark points 13 are filled with black. Through the mark points 13, the purpose of positioning is guaranteed in the shooting and scanning process, and the repeated positioning precision is further guaranteed in the scanning process.
Example 2:
the method for detecting the concrete roughness by using the handheld three-dimensional concrete roughness detection device comprises the following steps:
the method comprises the following steps: cleaning sundries on the surface of the concrete to be detected, selecting a proper detection area, placing the calibration plate 12 in the selected area, placing the calibration plate to be flat, and fixing the calibration plate 12 in the area;
step two: the handle 1 is held by hand, and the detection device is moved to the rectangular area 14 of the calibration plate 12 for scanning to obtain three-dimensional point cloud data of the concrete surface;
step three: and calculating the roughness of the point cloud data by adopting a plane expansion rate calculation method according to the three-dimensional point cloud data.
In the scanning process adopted in the second step, a planar single-chip scanning method is adopted to obtain point cloud data or a plurality of pieces of scanning are completed by utilizing the mark points 13 in the calibration plate to obtain the point cloud data.
The concrete calculation method in the third step is that the three-dimensional outer contour of the selected area is fitted according to the three-dimensional point cloud data, the surface area S1 of the measured concrete is calculated and solved according to the three-dimensional outer contour, the area of the selected standard rectangular area 14 is S2, and the calculation formula of the concrete roughness h is as follows: h = S1/S2.
Claims (4)
1. The method for detecting the concrete roughness by adopting the handheld concrete roughness three-dimensional detection device comprises a camera mounting plate (8), wherein a first camera assembly (9) and a second camera assembly (11) are symmetrically and fixedly mounted on the bottom end surface of the camera mounting plate (8), a laser (10) for positioning is fixed between the first camera assembly (9) and the second camera assembly (11), and the camera mounting plate (8) is connected with a handheld structure through a connecting plate (4);
the device is characterized by also comprising a calibration plate (12) used for positioning a scanning position, wherein the calibration plate (12) is matched with the first camera assembly (9), the second camera assembly (11) and the laser (10) and realizes the three-dimensional scanning of the concrete surface of the set area;
the calibration plate (12) is a rectangular plate, a rectangular area (14) is processed at the central part of the calibration plate (12), a plurality of mark points (13) are arranged on the periphery of the rectangular area (14), and the annular areas (15) except the mark points (13) are filled with black;
the detection method comprises the following steps:
the method comprises the following steps: cleaning sundries on the surface of the concrete to be detected, selecting a proper detection area, placing the calibration plate (12) in the selected area, placing the calibration plate flat and fixing the calibration plate (12) in the area;
step two: a handle (1) of a handheld structure is held by hand, and scanning is carried out on a rectangular area (14) of a calibration plate (12) by moving the detection device to obtain three-dimensional point cloud data of the surface of the concrete;
step three: calculating the roughness of the point cloud data by adopting a plane expansion rate calculation method according to the three-dimensional point cloud data;
in the scanning process adopted in the second step, a planar single-chip scanning method is adopted to obtain point cloud data or a plurality of pieces of scanning are completed by utilizing the mark points (13) in the calibration plate to obtain the point cloud data;
the concrete calculation method in the third step is that the three-dimensional outer contour of the selected area is fitted according to the three-dimensional point cloud data, the surface area S1 of the measured concrete is calculated and solved according to the three-dimensional outer contour, the area of the selected standard rectangular area (14) is S2, and the calculation formula of the concrete roughness h is as follows: h = S1/S2.
2. The method for detecting the roughness of the concrete by adopting the handheld three-dimensional concrete roughness detection device according to claim 1, is characterized in that: the handheld structure comprises a handle mounting plate (6), the handle mounting plate (6) is fixed at the top of the connecting plate (4), the top end of the handle mounting plate (6) is fixed with a handheld long rod (2), and the top of the handheld long rod (2) is fixed with a handle (1).
3. The method for detecting the roughness of the concrete by adopting the handheld three-dimensional concrete roughness detection device according to claim 1, is characterized in that: the camera mounting plate (8) is fixedly connected with the connecting plate (4) through a plurality of first bolts (3), and through holes (7) used for penetrating the first bolts (3) are machined in the connecting plate (4).
4. The method for detecting the roughness of the concrete by adopting the handheld three-dimensional concrete roughness detection device according to claim 2, is characterized in that: the handle mounting plate (6) is fixedly connected with the connecting plate (4) through a second bolt (5).
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| CN113758459A (en) * | 2021-09-07 | 2021-12-07 | 郑州大学 | Method for quantitatively characterizing morphological characteristics of contact surface of high polymer grouting material and concrete |
| CN113884032A (en) * | 2021-09-24 | 2022-01-04 | 中建西部建设西南有限公司 | Three-dimensional laser detection equipment and method for flatness of concrete cube test block |
| CN114608492A (en) * | 2022-04-14 | 2022-06-10 | 上海市建筑科学研究院有限公司 | Evaluation method for roughness evaluation index of joint surface of precast concrete member |
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