Asphalt mixture paving uniformity continuous detection device

Abstract

The utility model discloses a device for continuously detecting the uniformity of a paved asphalt mixture, which comprises a box body arranged at the tail part of a paving vehicle, a horizontal partition plate is arranged in the box body, and a first cavity is formed between the upper end surface of the horizontal partition plate and the inner wall of the box body; a second cavity is formed between the lower end face of the horizontal partition plate and the inner wall of the box body, a camera used for image acquisition is arranged in the second cavity, a first opening penetrating up and down is formed in the horizontal partition plate, and a semiconductor chilling plate is arranged in the first opening; the hot end face of the semiconductor chilling plate is located in the first cavity, and the cold end face of the semiconductor chilling plate is located in the second cavity. According to the utility model, the plurality of cameras for image acquisition are arranged at the lower end of the box body, and the plurality of semiconductor chilling plates for cooling the cameras are arranged at the upper end in the box body, so that the interior of the box body is kept at a certain low temperature, the influence of external high temperature on the cameras is reduced, and the service life of the cameras is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt paving equipment, and in particular relates to a device for continuously detecting uniformity of paving asphalt mixture. Background Art

[0002] The uniformity of asphalt mixture during paving is an important factor affecting the quality of asphalt pavement construction. Therefore, it is necessary to conduct real-time and continuous detection of the uniformity of asphalt mixture during paving. Publication No. CN107341794A discloses a real-time detection method for asphalt mixture paving uniformity, comprising the following steps: a. using LabVIEW software on a PC to collect in real time a color digital image taken by a digital camera during the paving process of an asphalt mixture paver, and transmitting the collected color digital image to a remote control center server in real time through a wireless network; b. using MATLAB software on a PC to convert the collected color digital image into a grayscale image, filter and denoise the grayscale image, perform histogram equalization, convert the grayscale image into a binary image, perform small particle filtering, image corrosion, gap filling, small particle re-filtering, image segmentation, and image expansion processing; c. based on the asphalt mixture with aggregates of more than 9.5 mm in size in the processed image, a calculation model for uniform distribution of image particles is established by calculating the static moment of the four sides of the image and then obtaining the coefficient of variation, the calculation model calculates the image to obtain an evaluation index value and an evaluation result, the evaluation result is transmitted to the remote control center server through a wireless network, and is fed back to the PC through a wireless network in real time after being processed by the remote control center server, thereby realizing real-time detection of asphalt mixture paving uniformity.

[0003] In addition, announcement number CN209046795U discloses a real-time digital image acquisition device for asphalt mixture paving uniformity. In its technical solution, a number of cameras are set on a paving vehicle so that the cameras can move along with the movement of the paving vehicle, thereby achieving continuous detection of the uniformity of the asphalt mixture through image acquisition by the cameras.

[0004] However, it is found in practice that because asphalt mixture has a certain amount of heat during production and transportation, the temperature of the paving area is relatively high when the asphalt mixture is paved by a paver. The long-term operation of the camera in a high temperature environment can easily reduce the life of the components in the camera, which is not conducive to the camera's image acquisition. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a device for continuously detecting the uniformity of paving asphalt mixture, so as to solve the technical problems raised in the background technology.

[0006] The utility model provides the following technical solutions:

[0007] A device for continuously detecting the uniformity of asphalt mixture being spread, comprises a box body arranged at the rear of a paving vehicle, a horizontal partition being arranged inside the box body, a first chamber being formed between the upper end surface of the horizontal partition body and the inner wall of the box body, a second chamber being formed between the lower end surface of the horizontal partition body and the inner wall of the box body, a camera for image acquisition being arranged in the second chamber, a first opening penetrating from top to bottom being arranged on the horizontal partition body, a semiconductor refrigeration plate being arranged in the first opening, a hot end surface of the semiconductor refrigeration plate being located inside the first chamber, and a cold end surface of the semiconductor refrigeration plate being located inside the second chamber.

[0008] Preferably, the box is connected to the paving vehicle via a connecting piece, and the connecting piece includes a first connecting seat and a second connecting seat for connecting to the paving vehicle, the first connecting seat is arranged on a side surface of the box close to the paving vehicle, and the first connecting seat and the second connecting seat are connected by a connecting rod.

[0009] Preferably, the lower end surface of the box body is provided with a second opening which passes through from top to bottom, the lens part of the camera is vertically downwardly located at the second opening, a camera mounting seat is also provided inside the box body at the second opening, and a transparent protective glass is also provided at the lower end of the inner circle of the second opening.

[0010] Preferably, an air inlet is provided on the left side surface of the box body at the position of the first chamber, and a first filter is provided in the air inlet.

[0011] Preferably, a first air outlet is further provided on the right side of the box body at the position of the first chamber, a second filter is further provided in the first air outlet, and a first exhaust fan is provided inside the first chamber near the position of the first air outlet.

[0012] Preferably, a second air outlet is provided on the right side surface of the box body at the position of the second chamber, a third filter is provided in the second air outlet, and a second exhaust fan is provided at the right end of the second chamber near the second air outlet.

[0013] Preferably, the length direction of the box body is horizontally arranged along the width direction of the paving vehicle, and a plurality of the semiconductor refrigeration plates are provided, and the plurality of the semiconductor refrigeration plates are evenly arranged at equal intervals along the length direction of the box body.

[0014] Preferably, a plurality of cameras are provided, and the plurality of cameras are evenly arranged at equal intervals along the length direction of the box.

[0015] Preferably, an air equalizing plate is horizontally arranged inside the second chamber, the air equalizing plate is located above the camera, and a plurality of air vents penetrating from top to bottom are arranged on the air equalizing plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a device for continuously detecting the uniformity of paving asphalt mixture. By arranging a plurality of cameras for image acquisition at the lower end of a box body and arranging a plurality of semiconductor refrigeration sheets for cooling the cameras at the upper end inside the box body, the interior of the box body is kept at a certain low temperature, the influence of the external high temperature on the cameras is reduced, and the service life of the cameras is prolonged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the utility model when connected with a paving vehicle.

[0020] Figure 2 It is a left side schematic diagram of the utility model.

[0021] Figure 3 It is a left-side structural schematic diagram of the utility model.

[0022] Figure 4 It is a front view structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-4 As shown, a continuous detection device for the uniformity of paving asphalt mixture comprises a box body 2 arranged at the rear of a paving vehicle 1, a horizontal partition 3 is arranged inside the box body 2, a first chamber 4 is formed between the upper end surface of the horizontal partition 3 and the inner wall of the box body 2, a second chamber 5 is formed between the lower end surface of the horizontal partition 3 and the inner wall of the box body 2, a camera 6 for image acquisition is arranged in the second chamber 5, a first opening 8 is arranged on the horizontal partition 3, a semiconductor cooling plate 7 is arranged in the first opening 8, the hot end surface of the semiconductor cooling plate 7 is located inside the first chamber 4, and the cold end surface of the semiconductor cooling plate 7 is located inside the second chamber 5. By arranging a plurality of cameras for image acquisition at the lower end of the box body, and arranging a plurality of semiconductor cooling plates for cooling the cameras at the upper end of the box body, the inside of the box body is kept at a certain low temperature, the influence of the external high temperature on the camera is reduced, and the service life of the camera is increased.

[0026] The specific method for continuous detection of the uniformity of paved asphalt mixture belongs to the prior art and has been disclosed in a real-time detection method for paving uniformity of asphalt mixture disclosed in publication number CN107341794A, which includes the following steps: a. using LabVIEW software on the PC side to collect the color digital images taken by the digital camera in the process of paving the mixture by the asphalt mixture paver in real time, and transmitting the collected color digital images to the remote control center server in real time through the wireless network; b. using MATLAB software on the PC side to convert the collected color digital images into grayscale images, filter and denoise the grayscale images, and directly detect the color digital images; Square image equalization, grayscale image conversion to binary image, small particle filtering, image corrosion, gap filling, small particle re-filtering, image segmentation, image expansion processing; c. Based on the asphalt mixture with aggregates above 9.5mm in size in the processed image, a calculation model for uniform distribution of image particles is established by calculating the static moment of the four sides of the image and then obtaining the coefficient of variation. The calculation model calculates the image and obtains the evaluation index value and evaluation result. The evaluation result is transmitted to the remote control center server via a wireless network, and after being processed by the remote control center server, it is fed back to the PC via a wireless network in real time to realize real-time detection of the uniformity of asphalt mixture paving. No more details will be given here.

[0027] The box body 2 is connected to the paving vehicle 1 through a connecting piece, and the connecting piece includes a first connecting seat 22 and a second connecting seat 23 for connecting to the paving vehicle 1. The first connecting seat 22 is arranged on a side surface of the box body 2 close to the paving vehicle 1, and the first connecting seat and the second connecting seat are connected through a connecting rod 24. The first connecting seat 22 can be welded to the box body 2, and the second connecting seat can be connected to the rear of the paving vehicle by bolts, welding, etc.

[0028] The lower end surface of the box body 2 is provided with a second opening 9 that passes through from top to bottom, and the lens portion of the camera 6 is vertically downwardly located at the second opening 9. A camera mounting seat 11 is also provided inside the box body 2 at the second opening 9, and a transparent protective glass 10 is also provided at the lower end of the inner circle of the second opening 9. The camera is arranged inside the box body 2, which can reduce the influence of the external temperature of the box body on the camera.

[0029] The left side of the box body 2 is also provided with an air inlet 12 at the position of the first chamber 4, and a first filter 13 is also provided in the air inlet 12. The right side of the box body 2 is also provided with a first air outlet 14 at the position of the first chamber 4, and a second filter 15 is also provided in the first air outlet 14, and a first exhaust fan 16 is provided inside the first chamber 4 near the first air outlet 14. The first exhaust fan 16 is connected to the inner wall of the first chamber through a support frame, and through the operation of the first exhaust fan, the high-temperature air generated by the hot end surface of the semiconductor cooling plate inside the first chamber due to the operation can be discharged to the outside.

[0030] A second air outlet 17 is also provided on the right side of the box body 2 at the position of the second chamber 5, a third filter 18 is also provided in the second air outlet 17, and a second exhaust fan 19 is also provided at the right end of the second chamber 5 near the second air outlet 17. A second air inlet is also provided on the left side of the box body 2 at the position of the second chamber 5, and a fourth filter is also provided in the second air inlet. Through the operation of the second exhaust fan 19, air cooling can be achieved when the outside temperature is not high. At this time, the semiconductor refrigeration sheet does not work, reducing the energy consumption of the semiconductor refrigeration sheet 7. When the outside temperature is high, the semiconductor refrigeration sheet starts to work. A temperature sensor for monitoring the temperature inside the second chamber is also provided inside the second chamber.

[0031] The length direction of the box body 2 is horizontally arranged along the width direction of the paving vehicle 1, and a plurality of semiconductor cooling sheets 7 are arranged, and the plurality of semiconductor cooling sheets 7 are evenly arranged at equal intervals along the length direction of the box body 2. The plurality of semiconductor cooling sheets 7 are connected in series and work and stop synchronously.

[0032] There are a plurality of cameras 6, which are evenly spaced along the length of the box 2. The plurality of cameras 6 together capture images of the entire width of the asphalt road surface.

[0033] An air distribution plate 20 is also horizontally arranged inside the second chamber 5, and the air distribution plate 20 is located above the camera 6. The air distribution plate 20 is provided with a plurality of vent holes 21 penetrating from top to bottom. The arrangement of the air distribution plate 20 can better evenly diffuse the cold air at the cooling surface of the semiconductor refrigeration plate to the camera position, thereby improving the uniformity of cooling the camera.

[0034] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for continuously detecting uniformity of paving asphalt mixture, characterized in that: The invention comprises a box body (2) arranged at the rear of a paving vehicle (1), wherein a horizontal partition (3) is arranged inside the box body (2), a first chamber (4) is formed between the upper end surface of the horizontal partition (3) and the inner wall of the box body (2), a second chamber (5) is formed between the lower end surface of the horizontal partition (3) and the inner wall of the box body (2), a camera (6) for image acquisition is arranged in the second chamber (5), a first opening (8) penetrating from top to bottom is arranged on the horizontal partition (3), a semiconductor cooling plate (7) is arranged in the first opening (8), a hot end surface of the semiconductor cooling plate (7) is located inside the first chamber (4), and a cold end surface of the semiconductor cooling plate (7) is located inside the second chamber (5).

2. According to claim 1, a device for continuous detection of uniformity of paving asphalt mixture, characterized in that: The lower end surface of the box body (2) is provided with a second opening (9) penetrating vertically, the lens portion of the camera (6) is located vertically downward at the second opening (9), a camera mounting seat (11) is also provided inside the box body (2) at the second opening (9), and a transparent protective glass (10) is also provided at the lower end of the inner circle of the second opening (9).

3. The device for continuous detection of uniformity of asphalt mixture paving according to claim 1 is characterized in that: An air inlet (12) is also provided on the left side of the box body (2) at the position of the first chamber (4), and a first filter screen (13) is also provided in the air inlet (12).

4. The device for continuous detection of uniformity of paving asphalt mixture according to claim 3 is characterized in that: A first air outlet (14) is also provided on the right side of the box body (2) at the position of the first chamber (4), a second filter screen (15) is also provided inside the first air outlet (14), and a first exhaust fan (16) is provided inside the first chamber (4) near the position of the first air outlet (14).

5. The device for continuous detection of uniformity of paving asphalt mixture according to claim 1, characterized in that: A second air outlet (17) is also provided on the right side surface of the box body (2) at the position of the second chamber (5), a third filter screen (18) is also provided in the second air outlet (17), and a second exhaust fan (19) is also provided at the right end of the second chamber (5) near the second air outlet (17).

6. The device for continuous detection of uniformity of paving asphalt mixture according to claim 1, characterized in that: The length direction of the box body (2) is arranged horizontally along the width direction of the paving vehicle (1), and a plurality of semiconductor cooling sheets (7) are provided, and the plurality of semiconductor cooling sheets (7) are evenly arranged at equal intervals along the length direction of the box body (2).

7. A device for continuously detecting uniformity of paving asphalt mixture according to claim 6, characterized in that: A plurality of cameras (6) are provided, and the plurality of cameras (6) are evenly arranged at equal intervals along the length direction of the box body (2).

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