A highway flatness detection device and method

Abstract

The present application relates to the technical field of highway pavement detection, aiming at the problem that the measurement of the flatness of the highway pavement cannot achieve continuity and intuitiveness in the prior art, and specifically relates to a highway flatness detection device and method, which comprises a support frame, an elastic control mechanism and a horizontal moving assembly are arranged on the support frame, the elastic control mechanism drives the horizontal moving assembly to displace when the ground is concave-convex during the driving of the engineering vehicle; a marking pen is installed on the horizontal moving assembly, a conveying mechanism is further installed on the support frame, a marking paper is installed on the conveying mechanism, the writing end of the marking pen is attached to the writing surface of the marking paper, and the present application leaves a straight line on the marking paper conveyed at the same speed as the engineering vehicle to represent that the pavement is in a flat state; when the pavement is convex or concave, the handwriting left by the marking pen on the marking paper will deviate from the original straight line track, and the flatness of the highway pavement can be obtained by analyzing the handwriting route on the marking paper.

Description

Technical Field

[0001] This invention relates to the field of highway pavement testing equipment technology, specifically to a highway smoothness testing device and method. Background Technology

[0002] Whether it is a concrete or asphalt road surface, after long-term use and repeated travel by heavy trucks, bulges, cracks, arches, misalignments, and potholes will appear on the road. Bulges can cause vehicles to bounce, and potholes can cause vibrations to the vehicles, both of which are adverse reactions to traffic safety.

[0003] Patent CN113914176B discloses a road surface smoothness detection marking device and method. Multiple detection mechanisms are slidably connected on a frame, spaced apart along the length of the frame. When the frame is placed on the ground, the multiple detection mechanisms can contact the ground, allowing them to slide along the frame's length. Once the frame is fully in contact with the ground, the user can observe the direction and distance of the sliding motion of the detection mechanisms to determine the length of the mechanism inserted into a depression or the distance it touches a protrusion, thus determining the degree of unevenness of the ground. This method is convenient for users to measure the unevenness of the ground.

[0004] However, this patent cannot achieve continuous measurement of the smoothness of highway pavement, and requires a large amount of data recording, making the operation process too cumbersome. To address this problem, a highway smoothness detection device and method need to be proposed. Summary of the Invention

[0005] To address the technical problem that existing technologies cannot achieve continuous and intuitive measurement of highway pavement smoothness.

[0006] This application provides a highway smoothness detection device, including a support frame, which is installed at the front of an engineering vehicle. The support frame is provided with an elastic control mechanism and a horizontal movement component. The elastic control mechanism and the horizontal movement control component are connected by a transmission. When the smoothness detection device is in operation, one end of the elastic control mechanism is in close contact with the ground. When the ground becomes uneven during the movement of the engineering vehicle, the elastic control mechanism will drive the horizontal movement component to move.

[0007] A marker pen is mounted on the horizontal moving component, and a conveying mechanism is also mounted on the support frame. Marking paper is mounted on the conveying mechanism, and the writing end of the marker pen is in contact with the writing surface of the marking paper.

[0008] Preferably, the horizontal movement component includes a positioning element and a first elastic element. The positioning element is slidably mounted on the support frame, the first elastic element is mounted on the support frame, the output end of the first elastic element is connected to the positioning element, the marker pen is fixedly mounted on the positioning element, the positioning element is provided with a ramp surface, the output end of the elastic control mechanism is connected to the positioning element through the ramp surface, and the positioning element is driven to move horizontally by the longitudinal movement of the elastic control mechanism.

[0009] Preferably, the elastic control mechanism includes a support column, which is slidably mounted on a support frame. The support column is provided with a second elastic element for pushing it down. A first rolling element is provided at the bottom end of the support column. When the flatness detection device is in operation, the first rolling element is in contact with the ground. A second rolling element is provided at the top end of the support column. The second rolling element is in contact with the ramp surface of the control element. When the second rolling element is at different positions on the ramp surface, the height position of the support column relative to the support frame will change.

[0010] Preferably, there is at least one marking pen, which is arranged in a stepped manner along the width of the road. The elastic control mechanism and the horizontal movement component correspond one-to-one with the marking pen. Different marking pens output different colors, and different colored marking pens are used to distinguish different positions in the width direction of the road surface.

[0011] Preferably, the output mechanism includes a winding mechanism and an unwinding mechanism, which are respectively installed on both sides of the top of the support frame. The winding mechanism and the unwinding mechanism have the same structure. The winding mechanism includes a fixed frame, which is fixedly installed on the support frame. A support shaft is rotatably installed on the fixed frame. A rotary driver for driving the support shaft is installed on the fixed frame. A roller is sleeved on the support shaft. The marking paper is wound on the roller. The winding mechanism and the unwinding mechanism are also equipped with a locking mechanism for fixing the roller.

[0012] Preferably, the locking mechanism includes a push rod, the support shaft has a hollow structure, the push rod is slidably disposed inside the support shaft, the push rod has an external expansion component, the external expansion component includes a support plate, a connecting rod and a locking member, the locking member is disposed around the support shaft and is slidably connected to the support shaft, the support plate is disposed on the push rod and is fixedly connected to the push rod, the support plate and the locking member are connected by a connecting rod for transmission, and the locking mechanism also includes a first linear actuator for driving the push rod to move, the first linear actuator is fixedly mounted on a fixed frame.

[0013] Preferably, the conveying mechanism further includes a side support panel for supporting the end of the support shaft. A sliding plate is provided at the bottom of the side support panel, and the sliding plate is slidably connected to the support frame. The side support panel is hinged to the sliding plate. A second linear driver is provided on the support frame, and the output end of the second linear driver is connected to the sliding plate. A third linear driver is provided on the sliding plate, and the two ends of the third linear driver are respectively hinged to the sliding plate and the side support panel. A top pressure plate for pressing the marking paper is provided at the top of the side support panel.

[0014] Preferably, a method for implementing a highway smoothness testing device includes the following steps:

[0015] S1. The staff drives the flatness detection device along the direction of travel of the road using an engineering vehicle, and ensures that the first rolling element in the elastic control mechanism can contact the ground before the engineering vehicle moves.

[0016] S2. After the engineering vehicle starts, it is necessary to control the conveying speed of the marking paper to be consistent with the driving speed of the engineering vehicle.

[0017] S3. When the engineering vehicle is driving on a smooth road, after the writing side of the marking paper passes the writing end of the marking pen, the writing left by the marking pen on the marking paper will appear as a straight line.

[0018] S4. When the engineering vehicle drives the flatness detection device over a road surface that is concave, the second rolling element in the elastic control mechanism will push the support column to descend through the second elastic element.

[0019] S5. When the support column descends, the second rolling element at its top descends with it. After the second rolling element contacts the position of the control element, the first elastic element drives the marker pen to move horizontally by pushing the control element. At this time, the marks left by the marker pen on the marking paper will deviate from the original straight trajectory, and after the first rolling element passes through the ground pit, the marks on the marking paper will return to straight line segments.

[0020] S6. By analyzing the strokes on the marking paper, the smoothness of the road surface can be determined.

[0021] The beneficial effects of this invention compared to the prior art are:

[0022] This application uses a marker pen to leave straight lines on marking paper transported at the same speed as the engineering vehicle to represent that the road surface is in a smooth state. When the road surface is concave, the second rolling element in the elastic control mechanism will push the support column to descend through the second elastic element. After the support column descends, the second rolling element at its top descends with it. After the second rolling element makes contact with the position limiter, the first elastic element pushes the positioner to drive the marker pen to move horizontally. At this time, the mark left by the marker pen on the marking paper will deviate from the original straight trajectory, and after the first rolling element passes through the ground depression, the mark on the marking paper will return to a straight line segment. By analyzing the mark path on the marking paper, the smoothness of the road surface can be obtained, thus completing the intuitive display of the road surface smoothness and realizing the purpose of continuous smoothness detection of the road surface. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is the front view of the present invention;

[0025] Figure 3 This is a front view of the support frame, elastic control mechanism, horizontal movement component, and marker pen of the present invention;

[0026] Figure 4 This is a top view of the support frame, elastic control mechanism, horizontal movement component, and marker pen of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the support frame, elastic control mechanism, horizontal movement component, marking pen, conveying mechanism, and marking paper of the present invention;

[0028] Figure 6 This is a front view of the winding mechanism, roller, and locking mechanism of the present invention;

[0029] Figure 7 This is a side view of the winding mechanism, roller, and locking mechanism of the present invention;

[0030] Figure 8 for Figure 7 A sectional view along the AA direction;

[0031] Figure 9 for Figure 8 Enlarged view of point B;

[0032] Figure 10 This is a diagram of the line trajectory drawn by the marker pen 4 in the embodiment;

[0033] Figure 11 This is a line segment diagram of the marking paper 6 in the embodiment.

[0034] The numbers on the map are:

[0035] 1-Support frame;

[0036] 2-Elastic control mechanism; 2a-Support column; 2a1-Circular ring plate; 2b-Second elastic element; 2c-First rolling element; 2d-Second rolling element;

[0037] 3-Horizontal movement component; 3a-Positioning element; 3a1-Slope surface; 3b-First elastic element;

[0038] 4- Marker pen;

[0039] 5-Conveying mechanism; 5a-Rewinding mechanism; 5a1-Fixed frame; 5a2-Support shaft; 5a3-Rotary driver; 5b-Unwinding mechanism; 5c-Roller; 5d-Locking mechanism; 5d1-Push rod; 5d2-Support plate; 5d3-Connecting rod; 5d4-Clamping element; 5d5-First linear driver; 5e-Side support panel; 5e1-Sliding plate; 5e2-Top pressure plate; 5e3-Third linear driver; 5f-Second linear driver;

[0040] 6- Marking paper;

[0041] 7-Engineering vehicle. Detailed Implementation

[0042] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0043] In some embodiments

[0044] like Figures 1 to 3 As shown, the following preferred technical solutions are provided:

[0045] A road smoothness detection device and method includes an engineering vehicle 7, a support frame 1 is installed on the engineering vehicle 7, the support frame 1 is located at the front of the engineering vehicle 7, an elastic control mechanism 2 and a horizontal movement component 3 are installed on the support frame 1, the elastic control mechanism 2 and the horizontal movement component are connected in a transmission manner, when the smoothness detection device is in working state, one end of the elastic control mechanism 2 is in close contact with the ground, when the ground becomes uneven during the movement of the engineering vehicle 7, the elastic control mechanism 2 will drive the horizontal movement component 3 to move.

[0046] The horizontal movement assembly 3 includes a control element 3a and a first elastic element 3b. The control element 3a is mounted on the upper surface of the support frame 1 and is slidably connected to the support frame 1. The first elastic element 3b is a spring, but not limited to it. The first elastic element 3b is mounted on the side wall of the support frame 1, and the output end of the first elastic element 3b is connected to the control element 3a.

[0047] The elastic control mechanism 2 includes a support column 2a, which passes through and is slidably connected to the support frame 1. The support column 2a slides longitudinally and is non-rotatable, and can be engaged with a linear bearing, but is not limited to this. The sliding direction of the control element 3a is perpendicular to the sliding direction of the support column 2a. A circular ring 2a1 is provided on the support column 2a, located below the support frame 1. A second elastic element 2b is sleeved on the support column 2a. The second elastic element 2b is a spring, but is not limited to this. The two ends of the second elastic element 2b respectively abut against the lower surface of the support frame 1 and the upper surface of the circular ring 2a1. A first rolling element 2c is provided at the bottom end of the support column 2a. The first rolling element 2c is in contact with the ground. The control member 3a is provided with a ramp surface 3a1. The top of the support column 2a is provided with a second rolling element 2d. The second rolling element 2d is a roller or ball, but not limited to this. The second rolling element 2d is in contact with the ramp surface 3a1 of the control member 3a. When the second rolling element 2d is at different positions on the ramp surface 3a1, the height position of the support column 2a relative to the support frame 1 will change. Specifically, when the second rolling element 2d is at the bottom of the ramp surface 3a1 of the control member 3a, the support column 2a is in a descending state. When the second rolling element 2d is at the top of the ramp surface 3a1 of the control member 3a, the support column 2a is in an ascending state.

[0048] A marker pen 4 is mounted on the top of the control component 3a, and a conveying mechanism 5 is also mounted on the support frame 1. A marking paper 6 is mounted on the conveying mechanism 5, and the writing end of the marker pen 4 is in contact with the writing surface of the marking paper 6.

[0049] Specifically, to address the technical challenge of continuous road surface smoothness testing and present the results in a visually intuitive manner, workers use a construction vehicle 7 to drive the smoothness testing device along the road's direction of travel. Before the construction vehicle 7 starts moving, it is ensured that the first rolling element 2c in the elastic control mechanism 2 is in contact with the ground. After the construction vehicle 7 starts, the conveying speed of the conveying mechanism 5 for the marking paper 6 needs to be controlled to match the travel speed of the construction vehicle 7. If the road remains smooth during the journey of the construction vehicle 7, the writing on the marking paper 6 will be visible after the writing end of the marking pen 4 passes over it. As a straight line, when the engineering vehicle 7 drives the flatness detection device past a sudden bump or pothole, such as a road surface arch or misalignment, if the road surface is concave, the second rolling element 2d in the elastic control mechanism 2 will push the support column 2a to descend through the second elastic element 2b, so that the first rolling element 2c is always in contact with the road surface. After the support column 2a descends, the second rolling element 2d at its top descends with it. After the second rolling element 2d restricts the position of the control member 3a, the first elastic element 3b pushes the control member 3a to move, and the second rolling element 2d will approach the bottom end of the slope surface 3a1 of the control member 3a.

[0050] After the control element 3a moves, it will drive the marking pen 4 to move horizontally. At this time, the marking pen 4 mark left on the marking paper 6 will deviate from the original straight trajectory. After the first rolling body 2c passes through the ground pit, the marking pen 4 mark on the marking paper 6 will return to a straight line segment. This makes the marking pen 4 mark left on the marking paper 6 by the flatness detection device after passing through the pit or bump exhibit a wave pattern. The amplitude and width of the wave pattern will be consistent with the size and depth of the bump or pit. Since the support column 2a rises and falls respectively when the flatness detection device passes through the bump and pit, this will cause the support column... When 2a rises, the second rolling element 2d drives the control element 3a to move in the opposite direction to the output direction of the first elastic element 3b via the ramp surface 3a1. This makes the movement direction of the control element 3a opposite when the support column 2a rises and falls. The marker pen 4 is installed on the control element 3a and moves with it. Therefore, the direction of the wave band can be used to distinguish whether the road surface is convex or concave. Finally, after the smoothness detection device completes the inspection of the road surface, the staff will remove the roll of marking paper 6 installed on the conveying mechanism 5. By analyzing the trace of the marker pen 4 on the marking paper 6, the smoothness of the road surface can be obtained.

[0051] In some embodiments

[0052] like Figure 4 As shown, the following preferred technical solutions are provided:

[0053] There are multiple marker pens 4, each with a different color. The different colored marker pens 4 are used to distinguish different positions along the width of the road surface. The number of elastic control mechanism 2 and horizontal movement component 3 is the same as the number of marker pens 4. The multiple marker pens 4 are arranged along the width of the road and distributed in a stepped manner. The arrangement direction of the marker pens 4 is consistent with the length direction of the marking paper 6.

[0054] Specifically, since bumps and potholes on a highway do not span the entire road surface, to address the technical challenge of inspecting the smoothness of the entire road surface, multiple marker pens 4 are arranged along the width of the road surface. This allows for precise measurement along the width, revealing the proportion of bumps or potholes across the road's width. Each marker pen 4 corresponds to a different position along the road's width. If all marker pens 4 are arranged horizontally along the road's width... Figure 10 As shown, when bumps and pits exist at different locations along the width of the road surface, the two adjacent marker pens 4 will move in opposite directions and collide, thus failing to display the size and extent of the bumps or pits. If the distance between the two marker pens 4 is far enough, the collision can theoretically be avoided to the greatest extent, but the precision of the road surface smoothness detection will also decrease accordingly.

[0055] Because multiple marker pens 4 arranged in a stepped pattern along the width of the road cannot simultaneously pass over the same road surface bumps or potholes, even if a marker pen 4 appears directly along the width of the road surface bump or pothole, the wave positions left by the multiple marker pens 4 on the marking paper 6 will not be on the same horizontal line. Therefore, the same scale starting point can be set on the marking paper 6 at the position corresponding to the writing ends of different marker pens 4, for example... Figure 11 The diagram shows that starting from point 0, it is possible to determine which band points on the marking paper 6 are on the same horizontal line. The marking pens 4, which correspond to different positions in the width direction of the road surface, are different colors, so that the marking pen 4 traces left on the marking paper 6 are also different colors. This makes it possible to distinguish multiple line segments on the road surface even if the marking pen 4 traces intersect.

[0056] In some embodiments

[0057] like Figures 5 to 9 As shown, the following preferred technical solutions are provided:

[0058] The output mechanism includes a winding mechanism 5a and an unwinding mechanism 5b, which are respectively installed on both sides of the top of the support frame 1. The winding mechanism 5a and the unwinding mechanism 5b have the same structure. The winding mechanism 5a includes a fixed frame 5a1, which is fixedly installed on the support frame 1. A support shaft 5a2 is provided on the fixed frame 5a1, and the support shaft 5a2 is rotatably connected to the fixed frame 5a1. A rotary driver 5a3 is provided on the fixed frame 5a1, and the output end of the rotary driver 5a3 is connected to the support shaft 5a2. A roller 5c is sleeved on the support shaft 5a2, and the marking paper 6 is wound on the roller 5c. A locking mechanism 5d is also installed on the winding mechanism 5a and the unwinding mechanism 5b. The locking mechanism 5d is used to fix the roller 5c.

[0059] The locking mechanism 5d includes a push rod 5d1 and a hollow support shaft 5a2. The push rod 5d1 is located inside the support shaft 5a2 and is slidably connected to the support shaft 5a2. Two sets of outward-opening components are mounted on the push rod 5d1, arranged axially along the push rod 5d1. Each outward-opening component includes a support plate 5d2, a connecting rod 5d3, and three locking pieces 5d4. These three locking pieces 5d4 are arranged around the support shaft 5a2, and are connected to the support shaft 5a2. The a2 is slidably connected, and the sliding direction of the locking piece 5d4 is perpendicular to the axis of the support shaft 5a2. The support plate 5d2 is set on the push rod 5d1, and the support plate 5d2 is fixedly connected to the push rod 5d1. The support plate 5d2 and the locking piece 5d4 are connected by a connecting rod 5d3. The locking mechanism 5d also includes a first linear driver 5d5, which is fixedly installed on the fixed frame 5a1. The output end of the first linear driver 5d5 is rotatably connected to the push rod 5d1.

[0060] The conveying mechanism 5 also includes a side support panel 5e for supporting the end of the support shaft 5a2. A sliding plate 5e1 is provided at the bottom of the side support panel 5e. The sliding plate 5e1 is slidably connected to the support frame 1. The side support panel 5e is hinged to the sliding plate 5e1. A second linear driver 5f is provided on the support frame 1. The output end of the second linear driver 5f is connected to the sliding plate 5e1. A third linear driver 5e3 is provided on the sliding plate 5e1. The two ends of the third linear driver 5e3 are hinged to the sliding plate 5e1 and the side support panel 5e, respectively. A top pressure plate 5e2 for pressing the marking paper 6 is provided at the top of the side support panel 5e.

[0061] Specifically, to solve the problem of installing and removing the label paper 6, the workers respectively mount two rollers 5c onto the support shafts 5a2 of the winding mechanism 5a and the unwinding mechanism 5b. The roller 5c on the unwinding mechanism 5b is wound with unwritten label paper 6, while the roller 5c on the winding mechanism 5a is an empty cylinder to be wound. The locking mechanism 5d starts working, and the first linear driver 5d5 pushes the push rod 5d1 to move. The push rod 5d1 simultaneously pushes the support plates 5d2 of the two outward-expanding components to move. During the movement, the support plates 5d2 push three clips 5d4 to extend outward through the connecting rod 5d3 to fix the inner wall of the roller 5c. The support panel 5e is tilted to facilitate the fitting of the roller 5c. The third linear actuator 5e3 starts working and its output pushes the side support panel 5e to rotate to a vertical position. The side support panel 5e has a support hole, which is coaxial with the support shaft 5a2. The output of the second linear actuator 5f pulls the sliding plate 5e1 to move, so that the opening of the side support panel 5e fits onto the end of the support shaft 5a2, thus supporting the end of the support shaft 5a2. At this time, the top pressure plate 5e2 also presses the top of the marking paper 6 to achieve close contact between the writing end of the marking pen 4 and the writing surface of the marking paper 6.

[0062] A method for implementing a highway smoothness testing device includes the following steps:

[0063] S1. The staff drives the flatness detection device along the direction of travel of the road using the engineering vehicle 7, and ensures that the first rolling element 2c in the elastic control mechanism 2 can contact the ground before the engineering vehicle 7 moves.

[0064] S2. After the engineering vehicle 7 starts, it is necessary to control the conveying speed of the conveying mechanism 5 to the marking paper 6 to be consistent with the driving speed of the engineering vehicle 7.

[0065] S3. When the engineering vehicle 7 is driving on a smooth road, after the writing surface of the marking paper 6 passes the writing end of the marking pen 4, the writing left by the marking pen 4 on the marking paper 6 appears as a straight line.

[0066] S4. When the engineering vehicle 7 drives the smoothness detection device past a sudden bump or pothole, such as a road surface arch or misalignment, if the road surface is concave, the second rolling element 2d in the elastic control mechanism 2 will push the support column 2a to descend through the second elastic element 2b, so that the first rolling element 2c is always in contact with the road surface.

[0067] S5. When the support column 2a descends, the second rolling element 2d at its top descends with it. After the second rolling element 2d makes contact with the position control member 3a, the first elastic element 3b pushes the position control member 3a to move. After the position control member 3a moves, it will drive the marking pen 4 to move horizontally with it. At this time, the marking pen 4 mark left on the marking paper 6 will deviate from the original straight trajectory. After the first rolling element 2c passes through the ground pit, the marking pen 4 mark on the marking paper 6 will return to a straight line segment.

[0068] S6. Finally, after the road surface is inspected by the smoothness testing device, the staff will remove the roll of marking paper 6 installed on the conveying mechanism 5. By analyzing the marking pen traces on the marking paper 6, the smoothness of the road surface can be determined.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A highway smoothness testing device, characterized in that, It includes a support frame (1), which is installed at the front of the engineering vehicle (7). The support frame (1) is equipped with an elastic control mechanism (2) and a horizontal movement component (3). The elastic control mechanism (2) and the horizontal movement component are connected in a transmission. When the flatness detection device is working, one end of the elastic control mechanism (2) is in close contact with the ground. When the ground becomes uneven during the movement of the engineering vehicle (7), the elastic control mechanism (2) will drive the horizontal movement component (3) to move. A marker pen (4) is installed on the horizontal moving component (3), and a conveying mechanism (5) is also installed on the support frame (1). A marker paper (6) is installed on the conveying mechanism (5), and the writing end of the marker pen (4) is in contact with the writing surface of the marker paper (6). The horizontal movement component (3) includes a control element (3a) and a first elastic element (3b). The control element (3a) is slidably mounted on the support frame (1), and the first elastic element (3b) is mounted on the support frame (1). The output end of the first elastic element (3b) is connected to the control element (3a). The marker pen (4) is fixedly mounted on the control element (3a). The control element (3a) is provided with a ramp surface (3a1). The output end of the elastic control mechanism (2) is connected to the control element (3a) through the ramp surface (3a1). The longitudinal movement of the elastic control mechanism (2) drives the control element (3a) to move horizontally. The elastic control mechanism (2) includes a support column (2a), which is slidably mounted on the support frame (1). The support column (2a) is provided with a second elastic element (2b) for pushing it down. The bottom end of the support column (2a) is provided with a first rolling element (2c). When the flatness detection device is in working state, the first rolling element (2c) is in contact with the ground. The top end of the support column (2a) is provided with a second rolling element (2d). The second rolling element (2d) is in contact with the ramp surface (3a1) of the control member (3a). When the second rolling element (2d) is in different positions on the ramp surface (3a1), the height position of the support column (2a) relative to the support frame (1) will change.

2. The highway smoothness testing device according to claim 1, characterized in that, There is at least one marker pen (4). The marker pens (4) are arranged along the width of the road and distributed in a stepped manner. The elastic control mechanism (2) and the horizontal movement component (3) correspond one-to-one with the marker pens (4). Different marker pens (4) output different colors. Different positions of the road surface in the width direction are distinguished by marker pens (4) with different colors.

3. The highway smoothness testing device according to claim 1, characterized in that, The output mechanism includes a winding mechanism (5a) and an unwinding mechanism (5b). The winding mechanism (5a) and the unwinding mechanism (5b) are respectively installed on the top two sides of the support frame (1). The winding mechanism (5a) and the unwinding mechanism (5b) have the same structure. The winding mechanism (5a) includes a fixed frame (5a1). The fixed frame (5a1) is fixedly installed on the support frame (1). A support shaft (5a2) is rotatably provided on the fixed frame (5a1). A rotary driver (5a3) for driving the support shaft (5a2) is provided on the fixed frame (5a1). A roller (5c) is sleeved on the support shaft (5a2). The marking paper (6) is wound on the roller (5c). A locking mechanism (5d) is also installed on the winding mechanism (5a) and the unwinding mechanism (5b). The locking mechanism (5d) is used to fix the roller (5c).

4. The highway smoothness testing device according to claim 3, characterized in that, The locking mechanism (5d) includes a push rod (5d1), a hollow support shaft (5a2), and the push rod (5d1) is slidably disposed inside the support shaft (5a2). The push rod (5d1) has an external expansion assembly, which includes a support plate (5d2), a connecting rod (5d3), and a locking piece (5d4). The locking piece (5d4) is arranged around the support shaft (5a2) and is slidably connected to the support shaft (5a2). The support plate (5d2) is disposed on the push rod (5d1) and is fixedly connected to the push rod (5d1). The support plate (5d2) and the locking piece (5d4) are connected by a transmission through the connecting rod (5d3). The locking mechanism (5d) also includes a first linear actuator (5d5) for driving the push rod (5d1) to move. The first linear actuator (5d5) is fixedly mounted on the fixed frame (5a1).

5. A highway smoothness testing device according to claim 3, characterized in that, The conveying mechanism (5) also includes a side support panel (5e) for supporting the end of the support shaft (5a2). A sliding plate (5e1) is provided at the bottom of the side support panel (5e). The sliding plate (5e1) is slidably connected to the support frame (1). The side support panel (5e) is hinged to the sliding plate (5e1). A second linear driver (5f) is provided on the support frame (1). The output end of the second linear driver (5f) is connected to the sliding plate (5e1). A third linear driver (5e3) is provided on the sliding plate (5e1). The two ends of the third linear driver (5e3) are hinged to the sliding plate (5e1) and the side support panel (5e) respectively. A top pressure plate (5e2) for pressing the marking paper (6) is provided at the top of the side support panel (5e).

6. The method for implementing a highway smoothness testing device according to claim 1, characterized in that, It includes the following steps: S1. The staff drives the flatness detection device along the direction of travel of the road using the engineering vehicle (7), and ensures that the first rolling element (2c) in the elastic control mechanism (2) can contact the ground before the engineering vehicle (7) moves. S2. After the engineering vehicle (7) starts, it is necessary to control the conveying speed of the conveying mechanism (5) to the marking paper (6) to be consistent with the driving speed of the engineering vehicle (7); S3. When the engineering vehicle (7) is driving on a smooth road, after the writing surface of the marking paper (6) passes the writing end of the marking pen (4), the writing left by the marking pen (4) on the marking paper (6) appears as a straight line. S4. When the engineering vehicle (7) drives the road surface to pass through the road surface where the road surface is concave, the second rolling element (2d) in the elastic control mechanism (2) will push the support column (2a) to descend through the second elastic element (2b). S5. When the support column (2a) descends, the second rolling element (2d) at its top descends with it. After the second rolling element (2d) makes contact with the position control element (3a), the first elastic element (3b) drives the marker pen (4) to move horizontally by pushing the position control element (3a). At this time, the marker pen (4) mark left on the marking paper (6) will deviate from the original straight trajectory. After the first rolling element (2c) passes through the ground pit, the marker pen (4) mark on the marking paper (6) will return to a straight line segment. S6. By analyzing the marking lines (4) on the marking paper (6), the smoothness of the road surface can be determined.

Images