Thermal imaging based asphalt scanning detection device

Abstract

The utility model provides a kind of asphalt scanning detection device based on thermal imager, when rolling machine goes forward, rolling assembly is always in rolling contact with asphalt pavement. When the road surface appears slightly undulating, the rolling assembly first generates displacement, driving the shooting lens to move together, since the rolling assembly and the shooting lens are arranged along the same direction, the shooting lens naturally maintains fixed close distance, and maintains the angle of perpendicularity with asphalt pavement to shoot. Place the rolling assembly on the side of the shooting lens and extend along the first direction, so that the shooting lens maintains relative angle and distance with asphalt pavement, reduces the temperature error caused by angle and distance. The elastic component reduces the influence of vehicle body vibration and impact on thermal imager, provides necessary buffer, reduces picture jitter. The shooting lens maintains close distance and is perpendicular to asphalt pavement, so that the angle and distance error is significantly reduced, and the temperature reading is more accurate.

Description

Technical Field

[0001] This application relates to the field of asphalt scanning, and more particularly to an asphalt scanning and detection device based on a thermal imager. Background Technology

[0002] Asphalt is frequently used for paving existing roads and bridges due to its excellent waterproof and frost-resistant properties.

[0003] After asphalt is laid on the road, it needs to be compacted using a roller to expel air from the mixture and rearrange the aggregates to form a stable skeleton and asphalt film. Compaction also eliminates segregation and streaks, resulting in a more uniform and smooth road surface.

[0004] During the rolling process of asphalt, the asphalt is greatly affected by temperature changes. High temperature makes it easier to roll, while low temperature makes the asphalt more rigid and difficult to roll, and can easily lead to large internal voids. Excessive heat can cause displacement or bleeding. Therefore, it is necessary to scan the temperature of the asphalt surface to facilitate rolling.

[0005] Existing scanning devices typically use thermal imagers for scanning. By installing the thermal imager in front of the roller, it can scan the asphalt pavement to be rolled, thereby assisting the roller in rolling. However, the thermal imager is set in front of and above the roller, and the distance between the thermal imager and the asphalt pavement is large. During the measurement process, it is affected by the weather and the setting distance, which makes it impossible to accurately scan the temperature of the asphalt surface, thus making it impossible to roll the asphalt surface more effectively. Utility Model Content

[0006] In view of this, it is necessary to provide an asphalt scanning and detection device based on a thermal imager to solve the above problems.

[0007] Embodiments of this application provide an asphalt scanning and detection device based on a thermal imager, comprising: A thermal imager having a camera lens that images along a first direction; At least one rolling component is disposed on the side of the thermal imager along the first direction and extends to one end of the imaging lens; An elastic component, one end of which is fixed to the thermal imager; The mounting component is fixedly connected at one end to the side of the elastic component away from the thermal imager, and the mounting component and the rolling component are respectively located at opposite ends of the thermal imager along the first direction; The rolling component contacts the asphalt pavement so that the camera lens is facing the asphalt surface.

[0008] In at least one embodiment of this application, the rolling assembly is provided on both opposite sides of the thermal imager; In the first direction, the distance from the rolling component to the mounting component is denoted as a, and the distance from the shooting lens to the mounting component is denoted as b, satisfying the relationship: a > b.

[0009] In at least one embodiment of this application, the scrolling component includes: Mounting plate, installed on the side of the thermal imager; A roller is mounted on the mounting plate and is rotatably connected to the mounting plate.

[0010] In at least one embodiment of this application, the direction from one of the rolling components to another is referred to as the second direction, in which the projected area of ​​the rolling wheel completely obscures the shooting lens.

[0011] In at least one embodiment of this application, the mounting component includes: The connecting housing is elastically connected at one end to the elastic component; The mounting ear has one end fixedly connected to the connecting housing, and the other end has an external fixing part.

[0012] In at least one embodiment of this application, the connecting housing has a movable cavity and a communicating hole communicating with the movable cavity; The elastic component includes: An elastic element is located between the thermal imager and the connecting housing, and abuts against the thermal imager and the connecting housing respectively; The connecting post is fixed at one end to the thermal imager and extends through the connecting hole into the movable cavity at the other end.

[0013] In at least one embodiment of this application, a limiting portion is provided protruding from the side of the connecting post near the connecting housing, and the diameter of the limiting portion is larger than the diameter of the communicating hole.

[0014] In at least one embodiment of this application, the mounting ear has a connecting portion that is perpendicular to the fixing portion, and the connecting portion has a positioning hole. The installation components also include: The first fixing bolt has one end passing through the positioning hole and threadedly connected to the connecting housing; The second fixing bolt has one end that passes through the fixing part and is fixed to the external rolling mill.

[0015] In at least one embodiment of this application, the connecting housing has a contact surface on the side away from the rolling assembly, and the contact surface is flush with the fixing part.

[0016] In at least one embodiment of this application, the thermal imager has a dust suction hole, the thermal imager has an imaging cavity, the imaging lens is located in the imaging cavity, and the dust suction hole communicates with the imaging cavity; The thermal imager-based asphalt scanning detection device also includes: An air pump is connected to the suction port.

[0017] The thermal imager-based asphalt scanning and detection device of this embodiment will have at least the following beneficial effects: In the aforementioned thermal imaging-based asphalt scanning and detection device, the rolling assembly remains in constant contact with the asphalt pavement as the compactor moves forward. When slight undulations occur on the pavement, the rolling assembly first shifts, causing the camera lens to move along with it. Since the rolling assembly and the camera lens are positioned in the same direction, the camera lens naturally maintains a fixed close distance and a perpendicular angle to the asphalt pavement for imaging.

[0018] The rolling component is placed on one side of the shooting lens and extends along the first direction, so that the shooting lens maintains a relative angle and distance with the asphalt road surface, reducing temperature errors caused by angle and distance.

[0019] The elastic components reduce the impact of vehicle vibration and impact on the thermal imager, providing necessary cushioning and reducing image jitter.

[0020] The camera lens is kept close to the asphalt road surface, which significantly reduces the error in angle and distance, resulting in more accurate temperature readings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] in: Figure 1 This is a structural diagram of an asphalt scanning and detection device based on a thermal imager; Figure 2 This is another structural view of the asphalt scanning and detection device based on a thermal imager; Figure 3 for Figure 2 Enlarged view of section C; Figure 4 This is another structural view of the asphalt scanning and detection device based on a thermal imager.

[0023] Explanation of main component symbols 10. Thermal imager; 11. Camera lens; 12. Imaging cavity; 13. Dust extraction port; 20. Rolling assembly; 21. Mounting plate; 22. Rolling wheel; 30. Elastic component; 31. Elastic element; 32. Connecting post; 321. Limiting part; 40. Mounting components; 41. Connecting housing; 411. Movable cavity; 412. Communicating hole; 413. Mating surface; 42. Install ear piece; 421. Connecting part; 422. Fixing part; 43. First fixing bolt; 44. Second fixing bolt; 45. Suction pump; A. First direction; B. Second direction. Detailed Implementation

[0024] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0025] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0026] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Embodiments of this application provide an asphalt scanning and detection device based on a thermal imager, comprising: The thermal imager 10 has a shooting lens 11, which images along a first direction A.

[0028] At least one rolling component 20 is disposed on the side of the thermal imager 10 along the first direction A and extends to one end of the shooting lens 11.

[0029] The elastic component 30 is fixed at one end to the thermal imager 10.

[0030] The mounting component 40 is fixedly connected at one end to the side of the elastic component 30 away from the thermal imager 10. The mounting component 40 and the rolling component 20 are respectively located at opposite ends of the thermal imager 10 along the first direction A.

[0031] The rolling component 20 contacts the asphalt pavement so that the camera lens 11 is facing the asphalt surface.

[0032] Please refer to Figures 1-4 In this embodiment, as the roller advances, the rolling assembly 20 remains in constant rolling contact with the asphalt pavement. When slight undulations occur on the pavement, the rolling assembly 20 first shifts, causing the camera lens 11 to move along with it. Since the rolling assembly 20 and the camera lens 11 are positioned along the same first direction A, the camera lens 11 naturally maintains a fixed close distance and maintains an angle perpendicular to the asphalt pavement for shooting.

[0033] The rolling component 20 is placed on one side of the shooting lens 11 and extends along the first direction A, so that the shooting lens 11 maintains a relative angle and distance with the asphalt road surface, thereby reducing the temperature error caused by the angle and distance.

[0034] The elastic component 30 reduces the impact of vehicle vibration and impact on the thermal imager 10, providing necessary buffering and reducing image jitter.

[0035] The camera lens 11 is kept close to and perpendicular to the asphalt road surface, which significantly reduces the error in angle and distance, and makes the temperature reading more accurate.

[0036] In at least one embodiment of this application, the rolling assembly 20 is provided on both opposite sides of the thermal imager 10.

[0037] In the first direction A, the distance from the rolling component 20 to the mounting component 40 is denoted as a, and the distance from the shooting lens 11 to the mounting component 40 is denoted as b, satisfying the relationship: a > b.

[0038] Please refer to Figures 1-4 In this embodiment, rolling components 20 are provided on both sides to form a structure in which two points roll with the road surface in the lateral direction, so that the thermal imager 10 has a better attitude relative to the road surface, thereby increasing the lateral stability of the thermal imager 10.

[0039] When there is a cross slope or local undulation on the road surface, the rolling components 20 on both sides jointly constrain the angle between the shooting lens 11 and the road surface, making it easier for the shooting lens 11 to remain perpendicular to the road surface and with a constant distance, thereby improving the accuracy of temperature measurement and avoiding temperature differences caused by space.

[0040] Since the rolling component 20 is always in contact with the asphalt pavement in the first direction A, when the roller encounters slight undulations or small obstacles while moving forward, the rolling component 20 contacts and rolls over them first. The elastic component 30 drives the thermal imager 10 to make a fine adjustment first, so that the lens is always in a retracted, fixed close-range position for imaging, avoiding the lens being subjected to force or scratches first.

[0041] With a > b, the rolling component 20 is positioned in front and the lens is positioned behind, forming a leading rolling-rear imaging structure. This reduces temperature errors caused by angle and distance fluctuations, resulting in more accurate readings.

[0042] In at least one embodiment of this application, the scrolling component 20 includes: Mounting plate 21 is mounted on the side of the thermal imager 10.

[0043] Roller 22 is mounted on the mounting plate 21 and is rotatably connected to the mounting plate 21.

[0044] Please refer to Figures 1-4 In this embodiment, the rotatable connection between the rolling wheel 22 and the mounting plate 21 allows the wheel to rotate freely relative to the mounting plate 21, thereby forming a low-friction rolling contact with the road surface.

[0045] Mounting plate 21 distributes and disperses the load generated by rolling contact, protects the housing of thermal imager 10, and improves structural reliability and impact resistance.

[0046] In at least one embodiment of this application, the direction from one of the rolling components 20 to another is denoted as the second direction B, in which the projected area of ​​the rolling wheel 22 completely obscures the shooting lens 11.

[0047] Please refer to Figures 1-4 In this embodiment, when the asphalt scanning detection device based on the thermal imager is subjected to contact, rubbing or splashing from the second direction B, the two side rollers 22 are in the front shielding position of the shooting lens 11, and come into contact with the foreign object first or bear the impact first, so that the shooting lens 11 is in the shadow area, reducing direct force and contamination.

[0048] The camera lens 11 faces the first direction A (road surface), while the two side rollers 22 form a side baffle effect in the second direction B, which shields stray infrared radiation from the side (such as low-angle reflection of sunlight and side heat sources) to a certain extent, reducing the disturbance of side-incident light to temperature measurement.

[0049] Side impacts / projectiles are primarily absorbed by the rolling wheels 22, and the camera lens 11 is located within the projection shielding area of ​​the two wheels, reducing the risk of mirror impacts, scratches, and dirt.

[0050] The probability of lateral stray radiation and sand entering the area in front of the camera lens 11 is reduced, which reduces the disturbance of side-incident light and lateral airflow on the temperature field reading, resulting in more stable and consistent temperature data.

[0051] In at least one embodiment of this application, the mounting component 40 includes: The connecting housing 41 is elastically connected at one end to the elastic component 30.

[0052] The mounting ear plate 42 is fixedly connected to the connecting housing 41 at one end and has an external fixing part 422 at the other end.

[0053] Please refer to Figures 1-4 In this embodiment, the connecting housing 41 bears the load from the thermal imager 10 and the elastic component 30, and the mounting ear 42 is used for external connection, forming a force path from the thermal imager 10, the elastic component 30, the connecting housing 41, the mounting ear 42 to the rolling mill.

[0054] The elastic connection is set at one end of the connecting housing 41, so that the vibration reduction is concentrated on the side of the connecting housing 41, while the side with the mounting lug 42 remains rigidly fixed to the outside, which not only retains the vibration reduction effect, but also ensures a stable connection with the rolling mill.

[0055] In at least one embodiment of this application, the connecting housing 41 has a movable cavity 411 and a communicating hole 412 communicating with the movable cavity 411.

[0056] The elastic component 30 includes: The elastic element 31 is located between the thermal imager 10 and the connecting housing 41, and abuts against the thermal imager 10 and the connecting housing 41 respectively.

[0057] The connecting post 32 is fixed at one end to the thermal imager 10, and extends through the connecting hole 412 into the movable cavity 411.

[0058] Please refer to Figures 1-4 In this embodiment, the connecting housing 41 is provided with a movable cavity 411 for providing displacement stroke, and a communicating hole 412 communicating with the movable cavity 411 is provided. The elastic component 30 is composed of an elastic element 31 and a connecting post 32. The elastic element 31 is disposed between the thermal imager 10 and the connecting housing 41, and abuts against the two to form an elastic connection. One end of the connecting post 32 is fixed to the thermal imager 10, and the other end passes through the communicating hole 412 and extends into the movable cavity 411.

[0059] The connecting hole 412 serves as a guide for the connecting post 32, allowing the thermal imager 10 to move relative to the connecting housing 41 in the axial direction of the connecting post 32. The elastic element 31 is compressed or rebounded under the action of road surface undulations and overall machine vibration, providing a buffer for the thermal imager 10. The movable cavity 411 provides sufficient travel for the deformation of the end of the connecting post 32 and the elastic element 31, avoiding rigid jamming.

[0060] The vibration and impact from the ground-contact rolling assembly 20 and the vehicle body are transmitted in an orderly manner along the path of the thermal imager 10, the elastic element 31 / connecting column 32, and the connecting housing 41. The vibration is absorbed by the elastic element 31, thereby keeping the thermal imager 10 at a fixed angle and distance relative to the asphalt road surface.

[0061] The connecting hole 412 restricts lateral swaying, the movable cavity 411 ensures elastic stroke, and the elastic element 31 mainly bears axial compression to reduce adverse shearing, thereby improving the overall vibration isolation and impact resistance. The vertical angle and close-range relationship of the thermal imager 10 relative to the road surface are more stable, the image jitter and temperature error are significantly reduced, and the temperature measurement is more accurate.

[0062] In at least one embodiment of this application, a limiting part 321 is provided on the side of the connecting post 32 near the connecting housing 41, and the diameter of the limiting part 321 is larger than the diameter of the communicating hole 412.

[0063] Please refer to Figures 1-4 In this embodiment, the connecting post 32 is integrally or fixedly provided with a limiting part 321 (such as a thickened step, flange ring or head) on the side near the connecting housing 41, and its diameter is larger than the diameter of the connecting hole 412.

[0064] When the thermal imager 10 is displaced too much in a direction away from the mounting component 40 due to external force, the limiting part 321 will abut against the end face of the housing of the connecting hole 412 to form a stop, thereby preventing the connecting post 32 from coming out of the connecting hole 412; at the same time, the end face of the limiting part 321, as a force-bearing surface, can disperse the edge contact stress and reduce the risk of hole edge scratches and jamming.

[0065] In at least one embodiment of this application, the mounting ear 42 has a connecting portion 421 that is perpendicular to the fixing portion 422, and the connecting portion 421 has a positioning hole.

[0066] The mounting component 40 also includes: The first fixing bolt 43 has one end passing through the positioning hole and threadedly connected to the connecting housing 41.

[0067] The second fixing bolt 44 has one end passing through the fixing part 422 and being fixed to the external rolling mill.

[0068] Please refer to Figures 1-4 In this embodiment, the first fixing bolt 43 passes through the self-positioning hole and is threadedly connected to the connecting housing 41, so that the mounting ear 42 and the connecting housing 41 are fixedly connected; at the same time, the second fixing bolt 44 passes through the fixing part 422 and is fixedly connected to the mounting position of the external rolling mill, thus completing the rigid installation of the whole machine.

[0069] In at least one embodiment of this application, the connecting housing 41 has a contact surface 413 on the side away from the rolling assembly 20, and the contact surface 413 is flush with the fixing part 422.

[0070] Please refer to Figures 1-4In this embodiment, the mating surface 413 and the fixing part 422 of the mounting ear 42 are on the same plane (flush). During assembly, the mating surface 413 and the fixing part 422 are simultaneously attached to the corresponding mounting plane of the rolling mill as a common mounting reference surface, thereby realizing the coplanar positioning and force transmission of the connecting housing 41, the mounting ear 42 and the whole machine on the same reference.

[0071] Since the two are flush, when tightening the outer second fixing bolt 44, the clamping force is distributed in the same plane, which avoids warping, torsion or off-center loading of the mounting ear plate 42 or the connecting housing 41 due to the height step, and helps to keep the thermal imager 10 fixedly connected relative to the first direction A.

[0072] The clamping force is transmitted in the same plane, which reduces assembly stress coupling and local stress concentration, and reduces the risk of loosening and fatigue.

[0073] In at least one embodiment of this application, the thermal imager 10 has a dust suction hole 13, the thermal imager 10 has a shooting cavity 12, the shooting lens 11 is located in the shooting cavity 12, and the dust suction hole 13 is connected to the shooting cavity 12.

[0074] The thermal imager-based asphalt scanning detection device also includes: The suction pump 45 is connected to the suction port 13.

[0075] Please refer to Figures 1-4 In this embodiment, during use, the suction pump 45 is activated to create a slight negative pressure and directional micro-airflow in the imaging cavity 12. External air enters through the dust suction hole 13, passes through the area in front of the imaging lens 11, and is then drawn away by the dust suction hole 13, thereby promptly removing dust, asphalt fumes, and moisture that have entered the vicinity of the imaging lens 11. At the same time, the continuous micro-airflow helps to make the gas environment around the lens more uniform and stable, reducing thermal condensation and the deposition of contaminants on the imaging lens 11, and maintaining the clean optical path and relatively constant cavity environment required for infrared imaging.

[0076] It significantly reduces dust and oil mist adhesion and fogging / condensation, avoiding temperature measurement deviations caused by decreased transmittance.

[0077] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A thermal imager-based asphalt scanning and detection device, characterized in that, include: A thermal imager having a camera lens that images along a first direction; At least one rolling component is disposed on the side of the thermal imager along the first direction and extends to one end of the imaging lens; An elastic component, one end of which is fixed to the thermal imager; The mounting component is fixedly connected at one end to the side of the elastic component away from the thermal imager, and the mounting component and the rolling component are respectively located at opposite ends of the thermal imager along the first direction; The rolling component contacts the asphalt pavement so that the camera lens is facing the asphalt surface.

2. The asphalt scanning and detection device based on a thermal imager according to claim 1, characterized in that, The rolling assembly is provided on both opposite sides of the thermal imager; In the first direction, the distance from the rolling component to the mounting component is denoted as a, and the distance from the shooting lens to the mounting component is denoted as b, satisfying the relationship: a > b.

3. The asphalt scanning and detection device based on a thermal imager according to claim 2, characterized in that, The scrolling component includes: Mounting plate, installed on the side of the thermal imager; A roller is mounted on the mounting plate and is rotatably connected to the mounting plate.

4. The asphalt scanning and detection device based on a thermal imager according to claim 3, characterized in that, The direction from one of the rolling components to another is referred to as the second direction, in which the projected area of ​​the rolling wheel completely obscures the shooting lens.

5. The asphalt scanning and detection device based on a thermal imager according to claim 1, characterized in that, The installation components include: The connecting housing is elastically connected at one end to the elastic component; The mounting ear has one end fixedly connected to the connecting housing, and the other end has an external fixing part.

6. The asphalt scanning and detection device based on a thermal imager according to claim 5, characterized in that, The connecting housing has a movable cavity and a communicating hole communicating with the movable cavity; The elastic component includes: An elastic element is located between the thermal imager and the connecting housing, and abuts against the thermal imager and the connecting housing respectively; The connecting post is fixed at one end to the thermal imager and extends through the connecting hole into the movable cavity at the other end.

7. The asphalt scanning and detection device based on a thermal imager according to claim 6, characterized in that, A limiting part is provided on the side of the connecting post near the connecting housing, and the diameter of the limiting part is larger than the diameter of the communicating hole.

8. The asphalt scanning and detection device based on a thermal imager according to claim 5, characterized in that, The mounting ear has a connecting part that is perpendicular to the fixing part, and a positioning hole is provided on the connecting part; The installation components also include: The first fixing bolt has one end passing through the positioning hole and threadedly connected to the connecting housing; The second fixing bolt has one end that passes through the fixing part and is fixed to the external rolling mill.

9. The asphalt scanning and detection device based on a thermal imager according to claim 8, characterized in that, The connecting housing has a contact surface on the side away from the rolling assembly, and the contact surface is flush with the fixing part.

10. The asphalt scanning and detection device based on a thermal imager according to claim 1, characterized in that, The thermal imager has a dust suction hole and a shooting cavity. The shooting lens is located inside the shooting cavity, and the dust suction hole is connected to the shooting cavity. The thermal imager-based asphalt scanning detection device also includes: An air pump is connected to the suction port.

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