CN116929257B - Prefabricated superimposed shear wall surface roughness acquisition method based on measurement type endoscope - Google Patents
Prefabricated superimposed shear wall surface roughness acquisition method based on measurement type endoscope Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 230000003746 surface roughness Effects 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 239000000523 sample Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 239000004567 concrete Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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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
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Abstract
The invention discloses a method for acquiring surface roughness of a prefabricated superimposed shear wall based on a measurement type endoscope, which is characterized in that a light steel sliding rail is fixed in an inner cavity of the prefabricated superimposed shear wall at the height of a detection position, an acquisition vehicle capable of sliding back and forth along the length direction of the light steel sliding rail is arranged on the light steel sliding rail, a probe of the endoscope is fixed on the acquisition vehicle, the probe is sent into the inner cavity of the prefabricated superimposed shear wall by the acquisition vehicle and the light steel sliding rail, a measuring lens arranged on the probe is used for carrying out static shooting and single measurement on a groove of a rough surface, the acquisition vehicle is continuously moved after the measurement is finished, and then the static shooting and the single measurement are carried out on other grooves on the rough surface. The invention has the advantages of convenient and fast acquisition, accurate data and small field labor intensity.
Description
Technical Field
The invention relates to the technical field of assembly type building detection, in particular to a prefabricated superimposed shear wall surface roughness acquisition method based on a measurement type endoscope
Background
In recent years, the national demand for the assembly rate of fabricated concrete structures has increased, and therefore, in addition to the "three-plate" requirement, vertical load-bearing prefabricated members are required, and prefabricated shear walls have become dominant. The prefabricated superimposed shear wall is used as a novel component and is formed by overlapping two concrete wall plates, a cavity is formed between the plates, and after the plates are installed in place on site, concrete is poured into the cavity so as to form a whole, which is also called a double-skin wall. Compared with the common prefabricated shear wall, the vertical reinforced concrete wall has the advantages of convenience in connection of vertical reinforced concrete bars, good integrity, easiness in management and control of site construction quality and the like. However, existing studies have shown that the quality of the new and old concrete junctions in prefabricated superimposed shear walls is a key factor affecting the overall shear and seismic performance. Aiming at the quality defect of the joint surface, the ultrasonic method and the core drilling sampling method can be adopted for detection at present, and the operation is also more convenient. When the detection result shows that the bonding surface has no obvious quality defect, the problem does not exist. However, when the inspection results show that there are significant defects in the joint, it is very difficult to remove and rework or strengthen the molded wall. Therefore, this post-detection approach has significant drawbacks.
Through a great deal of researches on the quality defects of the new concrete and the old concrete of the prefabricated superimposed shear wall, the roughness of the surface of the old concrete at the joint is a key factor influencing the later joint quality, and the larger the roughness of the joint is, the better the quality of the joint is after the new concrete and the old concrete are combined. Therefore, before concrete is poured, the roughness of the two inner surfaces of the prefabricated superimposed shear wall can be detected, and the qualified prefabricated superimposed shear wall can be used for engineering sites.
Prefabricated composite floor slabs, composite beams and the like have detection requirements on the surface roughness of the prefabricated composite floor slabs, composite beams and the like. According to the difference of roughness information acquisition principles, the detection method mainly comprises a filling method, a depth scale method and a three-dimensional scanning method. When the roughness of the prefabricated superimposed shear wall is detected, the following two factors need to be considered: (1) The prefabricated superimposed shear wall is formed by combining two prefabricated wallboards through truss ribs, an inner cavity needing later pouring is formed between the two prefabricated wallboards, and the width of the inner cavity, namely the distance between the two prefabricated wallboards, is usually only 100mm; (2) The prefabricated superimposed shear wall is vertically placed in a component pile field area, and a new and old concrete joint surface in the prefabricated superimposed shear wall is a vertical surface.
The applicability of the filling method, the depth rule method and the three-dimensional scanning method in the roughness detection of the prefabricated superimposed shear wall is analyzed one by one. For the filling method, the main filling modes include sand filling, wood dust, iron beads, plasticine filling methods and the like, roughness information is acquired by the method, and the bonding surface is required to be in a horizontal state, so that the method cannot be suitable for prefabricated superimposed shear walls. For the depth rule method, the depth rule is mainly used for direct measurement or matching with the porous reference plate, the method is applicable to a vertical joint surface, but the length of the depth rule is close to 100mm, the width space required by the operation of the handheld depth rule is certainly over 100mm, the distance between two prefabricated wallboards is insufficient for detection operation, and the depth rule method cannot be applicable to the prefabricated superimposed shear wall because the length of the hand is insufficient and the hand cannot extend to the middle position of the wall body for detection. For the three-dimensional scanning method, the method is the most advanced means for acquiring the roughness information of the prefabricated composite floor slab at present, and has the advantages that the on-site data acquisition speed is high, the measurement accuracy is high, the combination surface of the prefabricated composite shear wall is very similar to the combination surface of the prefabricated composite floor slab in concave-convex form, but the right upper part of the combination surface of the prefabricated composite floor slab is not shielded, the three-dimensional laser scanner can freely scan and acquire the information, and the distance between two oppositely arranged combination surfaces of the inner cavity of the prefabricated composite shear wall is only 100mm, and three-dimensional laser scanning equipment cannot be accommodated, so that the three-dimensional scanning method cannot be suitable for the prefabricated composite shear wall.
In summary, all three main roughness detection methods are not suitable for the prefabricated superimposed shear wall, which is one of the reasons why the detection of the roughness of the inner surface of the prefabricated superimposed shear wall is not required at present. In view of this, it is necessary to develop a new method for information acquisition for the roughness of the inner surface bonding surfaces of prefabricated superimposed shear walls.
Disclosure of Invention
The invention aims to solve the technical problem of providing a prefabricated superimposed shear wall surface roughness acquisition method based on a measurement endoscope, which has the advantages of convenience in acquisition, accuracy in data and low field labor intensity.
In order to solve the technical problems, the invention provides a method for acquiring the surface roughness of a prefabricated superimposed shear wall based on a measurement endoscope, which comprises the steps of fixing a light steel slide rail in an inner cavity of the prefabricated superimposed shear wall at the height of a detection position, arranging a movable acquisition vehicle capable of sliding reciprocally along the length direction of the light steel slide rail on the light steel slide rail, fixing a probe of the endoscope on the acquisition vehicle, conveying the probe into the inner cavity of the prefabricated superimposed shear wall by using the acquisition vehicle and the light steel slide rail, carrying out static shooting and single measurement on a groove of a rough surface by using a measurement lens arranged on the probe, continuously moving the acquisition vehicle after the measurement is finished, and carrying out static shooting and single measurement on other grooves on the rough surface;
when a single groove in a shot image is measured, a first datum point and a second datum point are respectively selected at flat positions on two sides of the single groove by using a depth profile measuring function of an endoscope, a depth profile is established, and a connecting line of the two datum points is a zero datum line of the depth profile; searching and selecting the lowest point of the groove in the depth profile, obtaining the distance from the point to the zero reference line, namely the depth value D of the lowest point, searching and selecting the highest points on two sides of the groove in the depth profile, obtaining the distance from the point to the zero reference line, namely the height value G of the highest point, and calculating the maximum concave-convex depth value U=D+G of the groove.
Further, the measuring lens arranged on the probe of the endoscope is a side-view measuring lens, and the angle of view of the side-view measuring lens is not smaller than 55 degrees.
Further, before static shooting is carried out on the groove with the rough surface, the collection vehicle is pushed to move, so that the collection vehicle slides on the light steel sliding rail, when the groove with the rough surface enters the screen of the endoscope, the moving speed is slowed down, the collection vehicle is pushed and pulled, the groove is located at the middle position of the screen, the position is kept unchanged, and an image is shot by using the image shooting function of the endoscope.
Further, after the probe of the endoscope is fixed on the acquisition vehicle, the distance from the surface of the measuring lens to the surface of the opposite cavity is 35-40mm, and the area of the shot image is not less than 30mm.
Furthermore, the light steel sliding rails are arranged at different heights of the prefabricated superimposed shear wall and used for collecting roughness information of the prefabricated superimposed shear wall at different heights.
Further, the collection vehicle can rotate along the circumferential direction of the light steel sliding rail, when the roughness information of the first surface in the inner cavity of the prefabricated superimposed shear wall is collected, and the second surface needs to be subjected to roughness information collection, the collection vehicle is rotated, so that the probe view angle of the endoscope is opposite to the second surface in the inner cavity.
Furthermore, the two ends of the light steel slide rail are respectively provided with a clamp, and the clamps are clamped and fixed on the side surface of the prefabricated superimposed shear wall and fix the light steel slide rail in the prefabricated superimposed shear wall.
Further, the light steel slide rail is locked with the clamp through screws.
The invention has the beneficial effects that:
1. the sliding rail is skillfully built in the narrow inner cavity of the prefabricated superimposed shear wall, the concave-convex depth value of the rough surface of the representative part is measured by utilizing the probe of the collecting vehicle loading measurement type endoscope, and the problem that the existing roughness detection method cannot collect the rough surface information of the prefabricated superimposed shear wall is solved.
2. The method utilizes the three-dimensional measurement endoscope to acquire roughness information, has visual images, performs fine measurement on a single groove, has high detection precision, converts the originally inapplicable implementation condition into a controllable, stable and smooth acquisition mode through the arrangement of the sliding rail, and has the advantages of low labor intensity, high acquisition speed and true and reliable data.
Drawings
FIG. 1 is a schematic view of the overall structure of the acquisition process of the present invention;
FIG. 2 is a schematic view of the mating structure between the light steel rail, the collection vehicle and the prefabricated stacked shear wall of the present invention;
FIG. 3 is an interface diagram of an endoscopic captured image;
FIG. 4 is an operational diagram of an endoscope function selection;
FIG. 5 is an operational diagram of fiducial point selection;
FIG. 6 is an operational diagram of an endoscopic search detection nadir position;
fig. 7 is an operation diagram of the endoscope search detection highest point position.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Referring to fig. 1 and 2, an embodiment of a method for acquiring surface roughness of a prefabricated superimposed shear wall based on a measurement endoscope is disclosed, in which roughness information is acquired mainly with the aid of the endoscope, specifically, a light steel slide rail 1 is fixed in an inner cavity of a prefabricated superimposed shear wall 2 at a height of a detection position, an acquisition vehicle 3 capable of sliding reciprocally along a length direction of the light steel slide rail is arranged on the light steel slide rail, a probe 4 of the endoscope is fixed on the acquisition vehicle, the probe is sent into the inner cavity of the prefabricated superimposed shear wall by the acquisition vehicle and the light steel slide rail, and a measurement lens 5 mounted on the probe is used for shooting a rough surface in the inner cavity and acquiring roughness data.
Specifically, in the collecting process, firstly, the collecting position is required to be determined on a prefabricated superimposed shear wall, the inner cavity of the prefabricated superimposed shear wall is irradiated by a flashlight and observed, at least two positions are selected for collecting according to the height of the wall and the position of a groove on the rough surface inside the wall, when the collecting position is two, the upper side and the lower side of the middle part of the wall can be selected, when the collecting position is three, the upper side and the lower side of the middle part of the wall can be selected, after the positions are selected, steel tape measures are adopted for measuring, marks are made on the two side surfaces of the prefabricated superimposed shear wall with the corresponding height, so that the mounting position mark of the light steel slide rail is obtained, and the light steel slide rail is fixed according to the mounting position mark;
after the probe is mounted on the acquisition vehicle, the probe is provided with a measuring lens, a side-view measuring lens can be mounted on the probe, the angle of view of the side-view measuring lens is not smaller than 55 degrees, an image can be conveniently shot in a narrow wall cavity, after the probe is mounted on the acquisition vehicle, the side-view measuring lens is opposite to a rough surface to be acquired, the distance from the rough surface to be shot is between 35 and 40mm, the area of an area for shooting the image is not smaller than 30mm, and the shooting requirement is met;
then the collection vehicle can be pushed to slide along the light steel slide rail, in the sliding process, a groove is arbitrarily determined on a rough surface close to the sliding starting position to serve as a first detection object, when the first detection object enters an endoscope screen, the collection vehicle is stationary, the position is kept unchanged, static shooting is prepared, and referring to FIG. 3, then an image is shot on the single groove through the endoscope, and the maximum concave-convex depth of the groove is calculated;
the method for shooting the image and calculating the maximum concave-convex depth of the groove is as follows: when a single groove in a shot image is measured, clicking a three-dimensional function key on an interface, selecting a depth profile measurement function, referring to fig. 4, then selecting a first datum point and a second datum point respectively on two sides of the groove, referring to fig. 5, clicking a view function key on the interface, and establishing a depth profile, wherein the connecting line of the two datum points is a zero datum line of the depth profile; searching and selecting the lowest point of the groove in the depth profile, referring to FIG. 6, automatically obtaining the distance from the lowest point to the zero reference line, namely the depth value D of the lowest point, clicking a screenshot key, and intercepting a picture containing the depth value of the lowest point of the groove; searching and selecting the highest points on two sides of the groove in the depth profile, referring to fig. 7, automatically obtaining the distance from the highest point to the zero reference line, namely the height value G of the highest point, clicking a screenshot key, intercepting a picture containing the depth value of the highest point, and calculating the maximum concave-convex depth value U=D+G of the groove.
After the end, the acquisition vehicle is continuously pushed to slide, one groove is continuously and randomly determined as a second detection object in the moving process, when the second detection object enters an endoscope screen, the acquisition vehicle is stationary, the position is kept unchanged, static shooting is carried out, then an image is shot on the single groove through the endoscope, the maximum concave-convex depth of the groove is calculated, the method for shooting the image and calculating the maximum concave-convex depth of the groove refers to the method of the first groove, the groove is repeatedly searched and is used as the detection object for acquisition until the acquisition quantity is met, and the acquisition on the first rough surface and the current acquisition height in the inner cavity is completed;
then the collection vehicle is rotated 180 degrees, so that a side view measurement lens of the endoscope faces the other surface on the current collection position, the collection vehicle is reset to the initial position, the collection vehicle is continuously pushed, the collection steps for one surface are repeated, and the collection of the second rough surface in the inner cavity and the current collection height is completed;
and then the light steel slide rail is dismantled, then the light steel slide rail is installed at the next acquisition position and data acquisition is carried out, so that the surface concave-convex depth values of other height positions of the prefabricated superimposed shear wall are acquired.
In the operation process, after the light steel slide rail is assembled, the collecting vehicle can be subjected to push-pull test, and the endoscope can be subjected to operation test; specifically, through carrying out full-stroke push-pull on the acquisition vehicle, ensuring smooth movement of the acquisition vehicle, then opening the endoscope, randomly selecting an area, and observing whether the visual angle of the displayed image is good, namely whether the visual angle in the image displayed by the endoscope is right against the rough surface of the inner cavity; it is also necessary to observe whether the area of the collected region is at least 30mm x 30mm, and whether the picture is clear, because the width of the grooves of the rough surface is usually 5-8 mm, the distance between adjacent grooves is usually about 30mm, when the area of the collected region is greater than 30mm x 30mm, it can be ensured that one groove and the flat parts on both sides of the groove are in the picture, and the collection can be performed after the above requirements are satisfied;
if the acquired image is not good in effect, the probe mounting position needs to be adjusted, and then the test is performed again until the test effect is good.
In the fixing of the light steel slide rail, the clamps 11 arranged at two ends can be matched, the clamps are clamped and fixed on the side surfaces of the prefabricated superimposed shear wall and fix the light steel slide rail inside the prefabricated superimposed shear wall, the light steel slide rail and the clamps are locked through screws, the light steel slide rail is fixed through the screws in a loose mode, the light steel slide rail can be rotated, namely the collecting vehicle rotates along with the light steel slide rail, the purpose of rapidly adjusting the position of the collecting vehicle is achieved, and the orientation of the probe is changed along with the light steel slide rail.
According to the method, the sliding rail is skillfully built in the narrow inner cavity of the prefabricated superimposed shear wall, the concave-convex depth value of the rough surface of the representative part is measured by using the acquisition vehicle to load the measurement type endoscope probe, the problem that the rough surface information of the prefabricated superimposed shear wall cannot be acquired is solved, and the method can be operated by a single person during acquisition, is small in operation difficulty, and is stable and reliable. The method utilizes the three-dimensional stereo measurement type endoscope to collect roughness information, the image is visual, and the method aims at the short-distance shooting and the fine measurement of a single groove, so that the detection precision is high, and the data is real and reliable. If a single endoscope probe is adopted to carry out long-distance large-area shooting, because the endoscope imaging is a single Zhang Chengxiang with a fixed angle, unlike the point cloud data accumulation imaging of multi-angle scanning of a three-dimensional laser scanner, the endoscope cannot acquire complete information of a plurality of grooves under one shooting angle.
The above embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (8)
1. A prefabricated superimposed shear wall surface roughness acquisition method based on a measurement type endoscope is characterized in that a light steel sliding rail is fixed in an inner cavity of a prefabricated superimposed shear wall at the height of a detection position, an acquisition vehicle capable of sliding back and forth along the length direction of the light steel sliding rail is arranged on the light steel sliding rail, a probe of the endoscope is fixed on the acquisition vehicle, the probe is sent into the inner cavity of the prefabricated superimposed shear wall by the acquisition vehicle and the light steel sliding rail, a measuring lens arranged on the probe is used for carrying out static shooting and single measurement on a groove of a rough surface, the acquisition vehicle is continuously moved after the measurement is finished, and then static shooting and single measurement are carried out on other grooves on the rough surface;
when a single groove in a shot image is measured, a first datum point and a second datum point are respectively selected at flat positions on two sides of the single groove by using a depth profile measuring function of an endoscope, a depth profile is established, and a connecting line of the two datum points is a zero datum line of the depth profile; searching and selecting the lowest point of the groove in the depth profile, obtaining the distance from the point to the zero reference line, namely the depth value D of the lowest point, searching and selecting the highest points on two sides of the groove in the depth profile, obtaining the distance from the point to the zero reference line, namely the height value G of the highest point, and calculating the maximum concave-convex depth value U=D+G of the groove.
2. The method for collecting the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 1, wherein the measuring lens arranged on the probe of the endoscope is a side-view measuring lens, and the angle of view of the side-view measuring lens is not less than 55 degrees.
3. The method for acquiring the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 1, wherein before static shooting is carried out on the groove with the rough surface, the acquisition trolley is pushed to move so as to enable the acquisition trolley to slide on the light steel slide rail, when the groove with the rough surface enters the screen of the endoscope, the moving speed is slowed down, the acquisition trolley is pushed and pulled so as to enable the groove to be located at the middle position of the screen, the position is kept unchanged, and an image is shot by using the image shooting function of the endoscope.
4. The method for acquiring the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 1, wherein after the probe of the endoscope is fixed on an acquisition vehicle, the distance from the surface of the measuring lens to the surface of the opposite inner cavity is 35-40mm, and the area of the shot image is not less than 30mm by 30mm.
5. The method for acquiring the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 1, wherein light steel slide rails are arranged at different heights of the prefabricated superimposed shear wall and used for acquiring the roughness information of the prefabricated superimposed shear wall at different heights.
6. The method for acquiring the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 1, wherein the acquisition vehicle can rotate along the circumferential direction of the light steel slide rail, and when the roughness information of the first surface in the inner cavity of the prefabricated superimposed shear wall is acquired, the acquisition vehicle is rotated so that the probe view angle of the endoscope is opposite to the second surface in the inner cavity when the roughness information acquisition of the second surface is required.
7. The method for collecting the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope according to claim 6, wherein the two ends of the light steel slide rail are respectively provided with a clamp, and the clamps are clamped and fixed on the side surface of the prefabricated superimposed shear wall and fix the light steel slide rail inside the prefabricated superimposed shear wall.
8. The method for collecting the surface roughness of the prefabricated superimposed shear wall based on the measuring endoscope of claim 7, wherein the light steel slide rail and the clamp are locked by screws.
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