CN109685759B - Concrete cracking acceleration equipment and test method thereof - Google Patents
Concrete cracking acceleration equipment and test method thereof Download PDFInfo
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Abstract
The invention discloses complete equipment and a detection method for accelerating concrete cracking, which comprise symmetrical double-trapezoid concrete cracking equipment, dry and hot air harsh environment simulation equipment, high-resolution amplification imaging equipment and a computer image processing module. Compared with the prior art, the invention adopts the symmetrical double-trapezoid concrete cracking equipment to lead the concrete to generate stress concentration in the appointed area in the hardening process, thereby showing single line cracks in the appointed area of the concrete, and adopts the dry and hot air harsh environment simulation equipment to lead the concrete to be in a dry and rapid water loss state in the hardening process, thereby accelerating the cracking of the concrete.
Description
Technical Field
The invention relates to a concrete test equipment technology, in particular to a complete set of equipment and a detection method for accelerating concrete cracking, and belongs to the technical application field of concrete test equipment.
Background
Cracking is a key factor influencing the durability of concrete, most structural damages of the concrete are caused by the expansion of cracks, most of the existing concrete cracking test technologies are limited in measuring the length and width of the cracks, the measurement subjective factor is large, and the cracking state of the whole concrete cannot be intuitively and accurately reflected; the two-dimensional data such as crack images and areas can reflect more data information of cracks, and the method is of great significance for guiding the research and development of high-durability concrete, but a complete set of testing technology capable of simply and quickly cracking the concrete and completely dividing the two-dimensional information of the cracks does not exist at present.
In order to understand the concrete cracking more comprehensively and improve the durability of the concrete, the development of the concrete rapid cracking equipment and the test method have important functions, and technical innovation is performed on the basis of the existing concrete cracking degree test method aiming at the conditions.
Disclosure of Invention
The invention aims to provide complete equipment and a detection method for accelerating concrete cracking, and aims to solve the problems that the general concrete cracking test technology provided in the background technology mostly stays in one-dimensional data of crack length and width measurement, the measurement subjective factor is large, the cracking state of the whole concrete cannot be reflected intuitively and accurately, and the use requirements of people cannot be met well.
In order to achieve the purpose, the invention provides the following technical scheme: a complete set of equipment for accelerating concrete cracking detection comprises a symmetrical double-trapezoid concrete cracking device, a dry hot air harsh environment simulation device, a display, a high-resolution amplification imaging device and a computer processing module, wherein the symmetrical double-trapezoid concrete cracking device comprises a stainless steel base, a symmetrical double-trapezoid stainless steel protective edge and a knife edge, the symmetrical double-trapezoid stainless steel protective edge is detachably fixed on the stainless steel base through screws, the knife edge is fixedly connected in the middle of the symmetrical double-trapezoid stainless steel protective edge, the dry hot air harsh environment simulation device comprises a hot air blower, a semi-closed stainless steel box body, an incandescent lamp tube, a temperature probe, a humidity probe and a wind speed probe, the hot air blower is welded on the inner side wall of the semi-closed stainless steel box body, and the incandescent lamp tube is spirally fixed on the top surface of the inner wall of the semi-closed stainless steel box body, temperature probe, humidity probe and wind speed probe weld respectively on the semi-closed stainless steel box internal wall, be equipped with the air heater export on the semi-closed stainless steel box lateral wall, the spiral is fixed with the display screen on the semi-closed stainless steel box external wall, temperature probe, humidity probe and wind speed probe respectively through the wire with the display screen links to each other.
Preferably, the hot air blower is respectively connected with the incandescent lamp tube, the temperature probe, the humidity probe and the wind speed probe in parallel through conducting wires.
Preferably, the temperature detection range of the temperature probe is 0-100 ℃, the humidity detection range of the humidity probe is 0-100% RH, and the wind speed detection range of the wind speed probe is 0-5 m/s.
Preferably, the high-resolution amplifying imaging device is electrically connected with the computer processing module through a wire, the high-resolution amplifying imaging device is specifically an adjustable focal length high-resolution camera, and the type of the adjustable focal length high-resolution camera is a USB visual positioning industrial camera RS-60 lens.
Preferably, the computer processing module adopts gray scale processing and ImageJ area measurement and calculation technologies.
A complete set of equipment for detecting accelerated concrete cracking comprises the following steps,
a. processing the true color high-resolution magnified picture into an 8-bit grayscale picture by Image J software;
b. the gray levels of the crack and the concrete back bottom are different, and the 8-bit gray level photo is manually set to a determined value with the gray level threshold value between 0 and 150 through embedded ImageJ software, so that the crack image is extracted from the concrete back bottom, and the crack information can be conveniently and independently calculated;
c. calculating the area of the cut crack image through a pixel point calculation function of ImageJ;
d. depicting the trend of a single crack through an ImageJ software depicting function, and calculating the trend length, namely the crack length, by using the pixel points;
e. dividing the area and the length to automatically calculate the width information of the crack;
f. through the steps, the cracking degree of the crack is obtained.
Compared with the prior art, the invention has the following beneficial effects:
1. the symmetrical double-trapezoid concrete cracking equipment is adopted to enable the concrete to generate stress concentration in the designated area in the hardening process, so that single line cracks appear in the designated area of the concrete, and the cracking degree of the concrete is greatly improved.
2. The concrete is in a dry and rapid water loss state in the hardening process by adopting dry and hot air harsh environment simulation equipment, so that the cracking of the concrete is accelerated.
3. The high-resolution amplification imaging equipment is adopted to collect the crack image of the concrete cracking area, so that the real-time image monitoring of the concrete crack is realized, and the visualization degree of the crack is greatly improved by high-resolution amplification imaging.
4. The method has the advantages that the ImageJ software is adopted to carry out gray level processing on the crack image, so that the crack is extracted from the concrete back bottom, the precision is greatly improved, the pixel point measurement and calculation are carried out on the crack image obtained after the gray level processing, the two-dimensional information of the crack is presented in a data form, the error is greatly reduced, and the precision is improved.
Drawings
Fig. 1 is a schematic overall perspective structure of an embodiment of the present invention.
FIG. 2 is a schematic view of the external structure of the present invention.
FIG. 3 is a schematic structural view of the symmetrical double-trapezoid concrete cracking equipment.
FIG. 4 is a schematic view of the flow structure of the simulation equipment for severe environment of dry hot air.
Fig. 5 is a schematic view of the flow structure of the high-resolution magnifying imaging apparatus according to the present invention.
FIG. 6 is a flow chart of an image processing module according to the present invention.
Fig. 7 is a schematic view of the knife edge structure of the present invention.
In the figure: 1. the device comprises a symmetrical double-trapezoid concrete cracking device, a dry hot air harsh environment simulation device, a stainless steel base 101, a stainless steel base 102, a symmetrical double-trapezoid stainless steel protective edge 103, a knife edge 104, a screw 201, a hot air blower 202, a semi-closed stainless steel box body 203, an incandescent lamp tube 204, a temperature probe 205, a humidity probe 206, a wind speed probe 3, a hot air blower outlet 4, a high-resolution amplification imaging device 401, an adjustable-focus high-resolution camera 5, a computer image processing module 6 and a display screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect through an intermediate medium, and the connection may be internal to the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a concrete fracture detection complete sets with higher speed, includes two trapezoidal concrete fracture equipment 1 of symmetry, dry and hot air harsh environment analog device 2, display 3, high-resolution magnification imaging device 4, computer image processing module 5, two trapezoidal concrete fracture equipment 1 of symmetry include stainless steel base 101, two trapezoidal stainless steel safe edge 102 of symmetry and edge of a knife 103, two trapezoidal stainless steel safe edge 102 of symmetry pass through screw 104 detachable to be fixed on the stainless steel base 101, edge of a knife 103 fixed connection be in two trapezoidal stainless steel safe edge 102 of symmetry is positive.
The symmetrical double-trapezoid concrete cracking equipment 1 is characterized in that a knife edge 103 is arranged in the middle of the trapezoid bottom surface, the stainless steel base 101 and the symmetrical double-trapezoid stainless steel protective edge 102 are of a screw type detachable structure, and in the concrete solidification hardening process, a stress concentration area is formed in the bottom surface area of the symmetrical double-trapezoid stainless steel protective edge 102 under the combined action of the symmetrical double-trapezoid stainless steel protective edge 102 and the knife edge 103, so that a single line is cracked in the area in the concrete solidification process.
The dry hot air harsh environment simulation device 2 comprises an air heater 201, a semi-closed stainless steel box 202, an incandescent lamp tube 203, a temperature probe 204, a humidity probe 205 and an air speed probe 206, wherein the air heater 201 is welded on the inner side wall of the semi-closed stainless steel box 202, so that hot air flows out of the box from the opening side of the semi-closed stainless steel box; the incandescent lamp 203 is spirally fixed on the top surface of the inner wall of the semi-closed stainless steel box 202, and the gray difference between the crack and the concrete surface is enhanced by irradiating concrete; temperature probe 204, humidity probe 205 and wind speed probe 206 weld respectively on semi-closed stainless steel box 202 inside wall, be equipped with air heater export 3 on the semi-closed stainless steel box 202 side wall, the spiral is fixed with display screen 6 on the semi-closed stainless steel box 202 outside wall, temperature probe 204, humidity probe 205 and wind speed probe 206 respectively through the wire with display screen 6 links to each other to survey humiture and wind speed in the semi-closed stainless steel box in real time.
The air heater 201 is electrically connected in parallel with the incandescent lamp tube 203, the temperature probe 204, the humidity probe 205 and the air speed probe 206 through conducting wires.
The temperature detection range of the temperature probe 204 is 0-100 ℃.
The humidity probe 205 has a humidity probe range of 0-100% RH.
The wind speed detection range of the wind speed probe 206 is 0-5 m/s.
The high-resolution amplifying imaging device 4 is specifically an adjustable-focus high-resolution camera 401, the high-resolution amplifying imaging device 4 is electrically connected with the computer image processing module 5 through a wire, the computer image processing module 5 controls the adjustable-focus high-resolution camera 401 to perform sampling and photographing to obtain true-color high-resolution amplifying photos at different time points, and the photos are processed and analyzed by the computer image processing module 5.
The type of the adjustable focal length high resolution camera 401 is a USB visual positioning industrial camera RS-60 lens.
The image processing and calculating module 4 adopts gray processing and ImageJ area measuring and calculating technologies.
The method comprises the steps of pushing concrete vibrated and molded in symmetrical double-trapezoid concrete cracking equipment 1 into dry and hot air harsh environment simulation equipment 2 by using a plate car, controlling a focus-adjustable high-resolution camera 401 to take images and take pictures through wired connection of a computer image processing module 5 and high-resolution amplification imaging equipment 4, obtaining high-resolution true-color crack pictures at different time points in the cracking process, storing the pictures in a computer, separating cracks from images by each picture through ImageJ gray processing technology, and calculating crack area, length and average width information through pixel points, thereby obtaining crack data information at different time points in the concrete cracking process.
A complete set of equipment for detecting accelerated concrete cracking comprises the following steps,
a. processing the true color high-resolution magnified picture into an 8-bit grayscale picture by Image J software;
b. the gray levels of the crack and the concrete back bottom are different, and the 8-bit gray level photo is manually set to a determined value with the gray level threshold value between 0 and 150 through embedded ImageJ software, so that the crack image is extracted from the concrete back bottom, and the crack information can be conveniently and independently calculated;
c. calculating the area of the cut crack image through a pixel point calculation function of ImageJ;
d. depicting the trend of a single crack through an ImageJ software depicting function, and calculating the trend length, namely the crack length, by using the pixel points;
e. dividing the area and the length to automatically calculate the width information of the crack;
f. through the steps, the cracking degree of the crack is obtained.
Example one
The concrete comprises the following components in parts by weight:
330 parts of cement, 1410 parts of stones, 605 parts of sand and 170 parts of water,
the concrete mixed by the parts by mass is pushed into a symmetrical double-trapezoid concrete cracking device 1, vibrated, molded and then pushed into a dry hot air harsh environment simulation device 2, an adjustable-focus high-resolution camera 401 is used for image taking and photographing, the picture is transmitted to a computer image processing module 5 through a lead, the computer image processing module 5 analyzes the picture, and the results are shown in the following table:
TABLE 1 crack cracking schedule
| Area of crack/mm2 | Crack length/mm | Crack width/mm | |
| Example one | 42.14 | 90.801 | 0.464 |
Example two
The concrete comprises the following components in parts by weight:
330 parts of cement, 1410 parts of stones, 605 parts of sand, 160 parts of water,
the concrete mixed by the parts by mass is pushed into a symmetrical double-trapezoid concrete cracking device 1, vibrated, molded and then pushed into a dry hot air harsh environment simulation device 2, an adjustable-focus high-resolution camera 401 is used for image taking and photographing, the photos are transmitted to a computer processing module 5 through a lead, the computer image processing module 5 analyzes the photos, and the results are shown in the following table:
TABLE 2 second crack cracking schedule of the examples
| Area of crack/mm2 | Crack length/mm | Crack width/mm | |
| Example two | 37.61 | 109.075 | 0.345 |
EXAMPLE III
The concrete comprises the following components in parts by weight:
330 parts of cement, 1410 parts of stones, 605 parts of sand, 150 parts of water,
the concrete mixed by the parts by mass is pushed into a symmetrical double-trapezoid concrete cracking device 1, vibrated, molded and then pushed into a dry hot air harsh environment simulation device 2, an adjustable-focus high-resolution camera 401 is used for image taking and photographing, the picture is transmitted to a computer image processing module 5 through a lead, the computer image processing module 5 analyzes the picture, and the results are shown in the following table:
TABLE 3 three crack cracking schedules of examples
| Area of crack/mm2 | Crack length/mm | Crack width/mm | |
| EXAMPLE III | 32.58 | 103.335 | 0.315 |
Table 4 examples parameter list of test materials
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A concrete crack detection complete equipment accelerates which characterized in that: the device comprises a symmetrical double-trapezoid concrete cracking device (1), a dry hot air harsh environment simulation device (2), a high-resolution amplification imaging device (4) and a computer image processing module (5), wherein the symmetrical double-trapezoid concrete cracking device (1) comprises a stainless steel base (101), symmetrical double-trapezoid stainless steel protective edges (102) and a knife edge (103), the symmetrical double-trapezoid stainless steel protective edges (102) are detachably fixed on the stainless steel base (101) through screws (104), the knife edge (103) is fixedly connected to the middle of the symmetrical double-trapezoid stainless steel protective edges (102), the dry hot air harsh environment simulation device (2) consists of an air heater (201), a semi-closed stainless steel box body (202), an incandescent lamp tube (203), a temperature probe (204), a humidity probe (205) and a wind speed probe (206), and the air heater (201) is welded on the inner side wall of the semi-closed stainless steel box body (202), the incandescent lamp tube (203) is spirally fixed on the top surface of the inner wall of the semi-closed stainless steel box body (202), the temperature probe (204), the humidity probe (205) and the wind speed probe (206) are respectively welded on the inner side wall of the semi-closed stainless steel box body (202), the side wall of the semi-closed stainless steel box body (202) is provided with a hot air blower outlet (3), the outer side wall of the semi-closed stainless steel box body (202) is spirally fixed with a display screen (6), and the temperature probe (204), the humidity probe (205) and the wind speed probe (206) are respectively connected with the display screen (6) through wires.
2. The accelerated concrete crack detection kit of claim 1, wherein: the hot air blower (201) is electrically connected in parallel with the incandescent lamp tube (203), the temperature probe (204), the humidity probe (205) and the wind speed probe (206) through leads.
3. An accelerated concrete crack detection kit as claimed in claim 1 or claim 2, wherein: the temperature detection range of the temperature probe (204) is 0-100 ℃, the humidity detection range of the humidity probe (205) is 0-100% RH, and the wind speed detection range of the wind speed probe (206) is 0-5 m/s.
4. The accelerated concrete crack detection kit of claim 1, wherein: the high-resolution magnifying imaging device (4) is electrically connected with the computer image processing module (5) through a USB output line, the high-resolution magnifying imaging device (4) is specifically an adjustable-focus high-resolution camera (401), the type of the adjustable-focus high-resolution camera (401) is a USB visual positioning industrial camera RS-60 lens, the resolution of the camera is 500 ten thousand pixels, and the magnification is 100 times.
5. An accelerated concrete crack detection kit as claimed in claim 4, wherein: the computer image processing module (5) adopts gray processing and ImageJ area measuring and calculating technologies.
6. The method for accelerated concrete crack detection kit according to claim 1, wherein: comprises the following steps of (a) carrying out,
a. processing the true color high-resolution magnified picture into an 8-bit grayscale picture by Image J software;
b. the gray levels of the crack and the concrete back bottom are different, and the 8-bit gray level photo is manually set to a determined value with the gray level threshold value between 0 and 150 through embedded ImageJ software, so that the crack image is extracted from the concrete back bottom, and the crack information can be conveniently and independently calculated;
c. calculating the area of the cut crack image through a pixel point calculation function of ImageJ;
d. depicting the trend of a single crack through an ImageJ software depicting function, and calculating the trend length, namely the crack length, by using the pixel points;
e. dividing the area and the length to automatically calculate the width information of the crack;
f. through the steps, the cracking degree of the crack is obtained.
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