An asphalt deflection testing device and method for road testing

Abstract

This invention discloses an asphalt deflection testing device and method for road inspection. It includes a vehicle body structure, a cylinder assembly, a sensing assembly, and a roller shutter mechanism. Belonging to the field of testing technology, this invention simulates the deformation of asphalt pavement in rainy weather. A trailer pulls the testing vehicle body to apply pressure to the asphalt pavement. The cylinder assembly lowers the bottom surface of the sensing assembly until it is parallel to the road surface. Simultaneously, movable blocks in multiple sensing boxes of the sensing assembly fall to conform to the road surface. If the road surface subsides during the device's movement, the movable blocks will descend accordingly. These movable blocks move up and down in sliding grooves around the sensing boxes via limiting blocks. Sensing strips are built into the inner surface of the sliding grooves to detect and record the descent trajectory of the movable blocks. When the device reaches a high water level on the road surface, the sensing assembly is raised, and the roller shutter mechanisms on both sides of the vehicle body are activated, preventing the device from getting wet on rainy roads.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, and specifically relates to an asphalt deflection testing device and method for road testing. Background Technology

[0002] Deflection generally refers to the total vertical deformation (total deflection) or vertical rebound deformation (rebound deflection) of the roadbed or pavement surface at the wheel gap position under the load of a specified standard vehicle, with the unit being 0.01 mm. Rebound deflection refers to the portion of the vertical deformation that the roadbed or pavement undergoes under a specified load and can recover after unloading.

[0003] Road deflection testing refers to on-site testing and measurement of the curved sections of a road to assess their safety and stability. This test is an important part of the road design and construction process, aiming to ensure that the road can withstand the impact of vehicles and traffic flow during use, reducing the risk of accidents. Water can cause great damage to asphalt because it reduces the strength and durability of the material. When water is on the surface, especially during heavy rainfall, the oil will separate from the asphalt. Therefore, it is necessary to conduct deflection testing of asphalt pavements on rainy days. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to address the problem that conducting asphalt pavement deflection testing in rainy weather can lead to inaccurate instrument measurements and the inability to protect the instrument body in time during heavy rainfall. Furthermore, this invention proposes an asphalt deflection testing device and method for road testing.

[0006] (II) Technical Solution

[0007] This invention is achieved through the following technical solution: an asphalt deflection testing device and method for road testing. Its structure includes: a vehicle body mechanism, with a body at the bottom, a top cover, inner walls around the body, a traction ring at the front, and tires at the bottom. The vehicle body mechanism also includes a sensing component consisting of a cylinder assembly and multiple sensing boxes. The cylinder assembly is concave, with four connecting rods connected to its bottom output end for vertical extension and retraction. The cylinder assembly is connected to the sensing component via multiple connecting rods. The sensing component includes a sensing box, a movable block, a telescopic rod, an electromagnetic block, and a motor. Multiple sensing boxes are fixed to the bottom of the sensing component. Limit blocks surround the movable block. An electromagnetic block is fixedly connected to the bottom of the telescopic rod, and the electromagnetic block is magnetically connected to the movable block. A sliding groove is formed around the sensing box, allowing the movable block to slide the sensing box vertically in the center. Sensing strips are present on the inner surface of the sliding groove, and the inner walls have openings on the left and right sides. It has an outlet that connects to the interior. The inner wall has roller blind mechanisms on the left and right sides that can resist rainwater. The roller blind mechanisms on the left and right sides merge towards the middle. The roller blind mechanism includes a curtain, a roller and a pivot. The curtain is wound around the surface of the roller. One side of the curtain is fixed to the surface of the roller, and the other side moves to the outlet as the roller rotates. The pivot passes through the middle of the roller to control the rotation. The front and rear ends of the inner wall have guide rails that can guide the movement of the device. The outlet and the guide rail are on the same horizontal line. Multiple pulleys are fixed on the upper and lower parts of the guide rail. Air jets are provided at the bottom of the inner wall on the left and right sides. Multiple air outlets are connected to the front and rear ends of the air jets.

[0008] Preferably, the sensing component is a cuboid, and the motor output end on the inner surface of the sensing component is connected to multiple telescopic rods for up-and-down control. The telescopic rods protrude from the bottom surface of the sensing component, and an electromagnetic block is fixedly connected to the bottom of the telescopic rod. The electromagnetic block generates magnetic force when the motor is energized.

[0009] Preferably, the sensing box is a hollow cube, and the movable block is composed of an adsorption block and a semi-circular body bonded together, with the semi-circular body being made of polyurethane block material.

[0010] Preferably, the movable blocks are interlocked with each other in the hollow part of the sensing box, the bottom surface of the sliding groove is 20 cm away from the bottom surface of the sensing box, and the top surface of the sliding groove extends to the bottom surface of the sensing component.

[0011] Preferably, the detection is carried out by a trailer towing vehicle traveling on an asphalt road. Multiple sensor boxes inside the vehicle are lowered via a control panel. The sensor boxes descend along with the asphalt road as it sinks. During the journey, a movable block inside the sensor box is set. Every 10 meters, the movable block is checked to see if it has descended and data is collected. The location of the asphalt road sinking is fed back to the control panel for marking.

[0012] Preferably, when there are water stains on the asphalt road surface, the control panel controls the jet to remove water stains from the bottom of the vehicle body. If there is severe water accumulation on the asphalt road surface, the control panel cylinder assembly and the roller shutter mechanism raise the sensing component into the vehicle body for protection. The water stains splashed onto the sensing component are then contained by the roller shutter inside the vehicle body.

[0013] Preferably, the vehicle is towed by a trailer and driven on an asphalt road for testing. Multiple sensor boxes inside the vehicle are lowered via a control panel. The sensor boxes descend along with the asphalt road surface as it sinks. During travel, a movable block inside each sensor box is monitored, and data is collected every meter traveled to detect whether the movable block has descended. The location of the asphalt road surface sinking is fed back to the control panel for marking. The values ​​for the multiple sensor boxes are set to N. For example, if the movable block descends along with the sensor box, the value is set to N. When the movable block is parallel to the asphalt road surface, the value is set to S. When the asphalt road surface bends, the movable block sinks along with it, and the value for sinking is set to M. When the asphalt road surface rebounds, the rebound causes the movable block to rise, and the value for rising is set to L. Finally, the data is used to obtain the sinking value a via SM, and the rebound value b via SML.

[0014] (III) Beneficial Effects

[0015] The static load deflection testing equipment for asphalt pavement provided in this solution has the following advantages:

[0016] This invention uses multiple sensor boxes for deflection detection. When the road surface sinks, the moving block and its sinking trend are sensed and recorded by the sensor strip inside the sensor box, effectively collecting the deflection detection results during the movement. Attached Figure Description

[0017] Figure 1 A three-dimensional schematic diagram of an asphalt deflection testing device and method for road testing provided by the present invention;

[0018] Figure 2 This is a frontal view diagram of the detection device;

[0019] Figure 3 This is a bottom-view diagram of the detection device;

[0020] Figure 4 This is a three-dimensional schematic diagram of the cylinder assembly of the detection device;

[0021] Figure 5 This is a schematic diagram of the cylinder assembly structure of the detection device;

[0022] Figure 6 This is a three-dimensional schematic diagram of the sensing components of the detection device;

[0023] Figure 7 This is a three-dimensional schematic diagram of the limiting block of the detection device;

[0024] Figure 8 This is a three-dimensional schematic diagram of the sensor box of the detection device;

[0025] Figure 9 This is a three-dimensional schematic diagram of the inner wall of the detection device;

[0026] Figure 10 This is a three-dimensional schematic diagram of the roller shutter mechanism of the detection device;

[0027] In the diagram: A. Vehicle body mechanism; 1. Body; 2. Top cover; 3. Cylinder assembly; 31. Connecting rod; 4. Sensor assembly; 41. Sensor box; 411. Sliding groove; 412. Sensor strip; 42. Movable block; 421. Limiting block; 43. Telescopic rod; 44. Electromagnetic block; 45. Motor; 5. Inner wall; 51. Sheet outlet; 6. Roller blind mechanism; 61. Sheet; 62. Roller shaft; 63. Rotating shaft; 7. Guide rail; 71. Pulley; 8. Jet engine; 81. Air outlet. Detailed Implementation

[0028] Please see Figure 1-10This invention provides a technical solution: an asphalt deflection testing device and method for road testing, comprising: A. a vehicle body mechanism 1, a vehicle body 2, a top cover 3, a cylinder assembly 31, a connecting rod 4, a sensing assembly 41, a sensing box 411, a sliding groove 412, a sensing strip 42, a movable block 421, a limiting block 43, a telescopic rod 44, an electromagnetic block 45, a motor 5, an inner wall 51, a sheet outlet 6, a roller shutter mechanism 61, a curtain 62, a roller shaft 63, a rotating shaft 7, a guide rail 71, a pulley 8, a jet engine 81, and an air outlet. The vehicle body mechanism A has a vehicle body 1 at the bottom, a top cover 2 at the top of the vehicle body 1, an inner wall 5 around the inside of the vehicle body 1, a traction ring 11 at the front end of the vehicle body 1, and tires 12 at the bottom of the vehicle body 1. The vehicle body mechanism A also includes a sensing component 4 consisting of a cylinder assembly 3 and multiple sensing boxes. The cylinder assembly 3 is a concave body, and four connecting rods 31 are connected to the bottom output end of the cylinder assembly 3 to extend and retract vertically. The cylinder assembly 3 is connected to the sensing component 4 through multiple connecting rods 31. The sensing component 4 includes a sensing box 41, a movable block 42, a telescopic rod 43, an electromagnetic block 44, and a motor 45. Multiple sensing boxes 41 are fixed to the bottom of the sensing component 4. The movable block 42 has limit blocks 421 around its perimeter. The bottom of the telescopic rod 43 is fixedly connected to the electromagnetic block 44, which is magnetically connected to the movable block 42. The sensing box 41 has a sliding groove 411 around its perimeter. The movable block 42 slides the sensing box 41 vertically in the middle. The inner surface of the sliding groove 411 has a sensing strip 412. The inner wall 5 has outlets 51 on the left and right sides that connect to the interior. The inner surface of the inner wall 5 is provided with roller blind mechanisms 6 on the left and right sides to prevent rainwater from getting wet. The roller blind mechanisms 6 on the left and right sides merge towards the middle. The roller blind mechanism 6 includes a curtain 61, a roller 62 and a rotating shaft 63. The curtain 61 is wound around the surface of the roller 62. One side of the curtain 61 is fixed to the surface of the roller 62, and the other side moves to the outlet 51 as the roller 62 rotates. The rotating shaft 63 passes through the middle of the roller 62 to control the rotation. The inner wall 5 has guide rails 7 at the front and rear ends that can guide the movement of the device. The outlet 51 and the guide rails 7 are on the same horizontal line. Multiple pulleys 71 are fixed on the upper and lower parts of the guide rails 7. The bottom of the inner wall 5 on the left and right sides is provided with jet generators 8. Multiple air outlets 81 are connected to the front and rear ends of the jet generators 8.

[0029] The sensing component 4 is a cuboid. The output end of the motor 45 on the inner surface of the sensing component 4 is connected to multiple telescopic rods 43 for up and down control. The telescopic rods 43 protrude from the bottom surface of the sensing component 4. An electromagnetic block 44 is fixedly connected to the bottom of the telescopic rod 43. The electromagnetic block 44 generates magnetic force when the motor 45 is energized.

[0030] The induction box 41 is a hollow cube, and the movable block 42 is composed of an adsorption block and a semi-circular body bonded together. The semi-circular body is made of polyurethane block material.

[0031] The movable block 42 fits into the hollow part of the corresponding sensing box 41. The bottom surface of the sliding groove 411 is 20 cm away from the bottom surface of the sensing box 41. The top surface of the sliding groove 411 extends to the bottom surface of the sensing component 4.

[0032] The vehicle is towed by a trailer and driven on the asphalt road for testing. Multiple sensor boxes 41 inside the vehicle are lowered via the control panel 21. The sensor boxes 41 descend along with the asphalt road as it sinks. During the journey, the movable block 42 inside the sensor box 41 is set. Every 10 meters, the movable block 42 is checked to see if it has descended and data is collected. The location of the asphalt road sinking is fed back to the control panel 21 for marking.

[0033] When there are water stains on the asphalt road, the control panel controls the jet engine 8 to remove water stains from the bottom of the vehicle. If there is severe water accumulation on the asphalt road, the control panel cylinder assembly 3 and the roller shutter mechanism 6 will raise the sensor assembly 4 into the vehicle for protection. The inside of the vehicle will be closed by the roller shutter to prevent water stains from splashing onto the sensor assembly 4.

[0034] The vehicle is towed by a trailer and driven on an asphalt road for testing. Multiple sensor boxes 41 inside the vehicle are lowered via control panel 21. The sensor boxes 41 descend along with the asphalt road surface as it sinks. During the journey, a movable block 42 inside each sensor box 41 is monitored. Every 10 meters, the movement of the movable block 42 is checked for descent and data is collected. The location of the asphalt road surface sinking is fed back to control panel 21 for marking. The values ​​for multiple sensor boxes 41 are set to N. For example, if the movable block 42 of the sensor box 41 descends, the value is set to N. When the movable block 42 is parallel to the asphalt road surface, the value is set to S. When the asphalt road surface bends, the movable block 42 sinks, and the descent value is set to M. When the asphalt road surface rebounds, the rebound causes the movable block 42 to rise, and the rise value is set to L. Finally, the data is used to obtain the sinking value a via SM, and the rebound value b via SML.

[0035] Working principle: In actual use, the surveyor attaches the hook of the towing truck to the towing ring 11 at the front of the vehicle body A. The towing truck moves, causing the tires 12 of the vehicle body to rotate. During the movement of the vehicle body A, the detection instrument is activated through the control panel 21 on the upper cover 2 of the vehicle body A. The cylinder assembly 3 lowers the four connecting rods 31 at the bottom of the sensing assembly 4. When the bottom surface of the sensing assembly 4 is in contact with the road surface, the motor 45 of the sensing assembly 4 de-energizes the electromagnetic blocks 44 under the multiple telescopic rods 43, causing the movable block 42 attracted by the electromagnetic block 44 to fall naturally into the sensing box 41. The movable block 42 is a magnetically attracted block and a semi-circular body that are bonded together. The bottom semi-circular body is made of polyurethane block, which has wear-resistant and high-temperature resistant properties. The bottom surface of the movable block 42 contacts the asphalt road surface. The inner wall of the sensing box 41 is embedded with sliding grooves 411, and the sliding grooves 411 are 20 cm away from the bottom surface of the sensing box 41 to prevent the movable block 42 from falling onto the road surface during the detection process. When the asphalt road surface sinks, the movable block 42 will descend along with the sinking area. At the same time, the limiting blocks 421 around the movable block 42 will slide downward in the sliding grooves 411 of the sensing box 41. The surface of the sliding grooves 411 has sensing strips 412, which can sense the downward trend of the movable block 42, record it and provide feedback.

[0036] If the asphalt road surface is wet during rainy weather, start the jet engine 8 on the inner wall 5 on both sides of the vehicle body 1. Both ends of the jet engine 8 are connected to the air outlet 81. The outlet of the air outlet 81 is tilted downward at a "45" degree to the road surface to remove water stains on the bottom of the vehicle body 1, which can effectively help with the inspection.

[0037] If there is excessive rainfall during the detection process, the telescopic rod 43 of the sensing component 4 will be activated to power the electromagnetic block 44. As the telescopic rod 43 extends downward, the electromagnetic block 44 can better attract the movable block 42. Once attracted, the movable block 42 retracts the electromagnetic block upward. At the same time, the cylinder component 3 uses the connecting rod 31 to retract the sensing component 4 into the vehicle body 2. Then, through the roller shutter mechanism 6 installed on the inner surface of the inner wall 5, the motor of the roller shutter mechanism 6 rotates the shaft 63. The shaft 63 drives the roller 62 to gradually unfold and extend multiple curtain slats 61 into the vehicle body 1. The inner wall 5 has guide rails 7 embedded at the front and rear ends. The slat outlet 51 is on the same horizontal line as the guide rail 7. Multiple pulleys 71 are fixed on the upper and lower parts of the guide rail 7, so that the curtain slats 61 on both sides unfold towards the middle and close to the bottom of the vehicle body 1, effectively preventing rainwater from splashing onto the detection device.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An asphalt deflection testing device for road testing, comprising a vehicle body (A), a vehicle body (1) at the bottom of the vehicle body (A), a cover (2) at the top of the vehicle body (1), a control panel (21) on the left edge of the cover (2), an inner wall (5) around the inside of the vehicle body (1), a traction ring (11) at the front end of the vehicle body (1), and a tire (12) at the bottom of the vehicle body (1). Its features are: The vehicle body structure (A) also includes a sensing component (4) consisting of a cylinder assembly (3) and multiple sensing boxes; The cylinder assembly (3) is a concave body, and the bottom output end of the cylinder assembly (3) is connected to four connecting rods (31) for vertical extension and retraction; The cylinder assembly (3) is connected to the sensing assembly (4) via multiple connecting rods (31); The sensing component (4) includes a sensing box (41), a movable block (42), a telescopic rod (43), an electromagnetic block (44), and a motor (45). Multiple sensor boxes (41) are fixed to the bottom of the sensing assembly (4); The active block (42) is surrounded by limit blocks (421); An electromagnetic block (44) is fixedly connected to the bottom of the telescopic rod (43). The electromagnetic block (44) is magnetically connected to the movable block (42); The sensor box (41) has sliding grooves (411) around its perimeter. The movable block (42) slides up and down in the hollow part of the sensor box (41); The inner surface of the sliding groove (411) has a sensing strip (412); The sensing component (4) is a cuboid. The output end of the motor (45) on the inner surface of the sensing component (4) is connected to multiple telescopic rods (43) for up and down control. The telescopic rods (43) protrude from the bottom surface of the sensing component (4). An electromagnetic block (44) is fixedly connected to the bottom of the telescopic rod (43). The electromagnetic block (44) generates magnetic force through the motor (45) energizing. The induction box (41) is a hollow cube, and the movable block (42) is composed of an adsorption block and a semi-circular body bonded together. The semi-circular body is made of polyurethane block material. The movable block (42) fits into the hollow part of the corresponding sensing box (41), the bottom surface of the sliding groove (411) is 20CM away from the bottom surface of the sensing box (41), and the top surface of the sliding groove (411) extends to the bottom surface of the sensing component (4). The inner wall (5) has a sheet outlet (51) on the left and right sides that connects to the interior. The inner surface of the inner wall (5) is provided with a roller shutter mechanism (6) on the left and right sides that can resist rainwater immersion. The roller shutter mechanisms (6) on the left and right sides merge towards the middle. The inner wall (5) is provided with a guide rail (7) at the front and rear ends that can guide the device to move. The sheet outlet (51) and the guide rail (7) are on the same horizontal line. The guide rail (7) is fixed with multiple pulleys (71) on the upper and lower sides. The roller blind mechanism (6) includes a curtain slat (61), a roller (62) and a rotating shaft (63). The curtain slat (61) is wound around the surface of the roller (62). One side of the curtain slat (61) is fixed to the surface of the roller (62), and the other side moves to the outlet (51) as the roller (62) rotates. The rotating shaft (63) passes through the middle of the roller (62) to control the rotation. The bottom of the inner wall (5) on both the left and right sides is provided with an air jet (8). The front and rear ends of the air jet (8) are connected to multiple air outlets (81). The air outlet (81) is inclined downward at a 45° angle towards the road surface.

2. A method for detecting asphalt deflection in road testing, characterized in that: Based on the asphalt deflection detection device for road testing according to claim 1, the device includes an asphalt deflection detection method. The detection method includes the following steps: the vehicle body is driven on the asphalt road surface by a trailer for testing. Multiple sensor boxes (41) inside the vehicle are lowered by the control panel (21). The sensor boxes (41) are lowered along with the asphalt road surface when it sinks. During the driving process, the movable block (42) in the inner box of the sensor box (41) is set. Every 10 meters, the movable block (42) is detected to see if it has fallen and data is collected. The sinking position of the asphalt road surface is fed back to the control panel (21) for marking. The values ​​of multiple sensor boxes (41) are set to N. For example, the value of the movable block (42) of the sensor box (41) is set to N when it falls. The value of the movable block (42) is set to S when it is parallel to the asphalt road surface. When the asphalt road surface deflects, the movable block (42) sinks. At this time, the sinking value is set to M. When the asphalt road surface rebounds, the rebound causes the movable block (42) to rise. The rising value is set to L. Finally, the sinking value (a) is obtained by SM and the rebound value (b) is obtained by SML.

Images