Intelligent detection and analysis device for surface flatness of pavement structure

Abstract

The invention discloses a pavement structure surface flatness intelligent detection and analysis device, which comprises a base arranged on a bracket and a laser distance measuring sensor arranged on the base and used for distance measurement, and is characterized in that the laser distance measuring sensor is electrically connected with a data receiving and processing module; the base is provided with a measuring structure used for measuring the flatness of the pavement in a multi-angle mode, the measuring structure comprises an arc-shaped directional supporting frame arranged above the base, and the spiral positioning groove is provided with a fixed swing assembly for driving the laser distance measuring sensor to swing in a reciprocating mode in a fan-shaped track in the vertical direction. The laser distance measuring sensor is driven to swing on a fan-shaped track in a reciprocating mode, multiple times of detection can be carried out on different positions on the same horizontal line, the flatness of the pavement structure is comprehensively evaluated, height changes of the different positions can be effectively captured through multi-point detection, and comprehensiveness and accuracy of detection results are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of flatness detection devices, and in particular to an intelligent detection and analysis device for the surface flatness of a pavement structure. Background Art

[0002] In modern transportation projects, the quality of the pavement structure is directly related to the performance of the road, driving safety and comfort. The pavement structure usually includes materials such as asphalt concrete or cement concrete. As the key layer for bearing traffic loads, it must have good flatness and load-bearing capacity. The unevenness of the pavement surface will not only cause vehicle vibration and increase tire wear, but may also cause safety hazards such as vehicle loss of control and accidents.

[0003] Chinese patent (Announcement No.: CN110205910A), the scheme specifically includes a frame, a power supply and storage system and a driving system, the power supply and storage system and the driving system are installed at the rear of the frame, and a detection component, a single-chip control system and a wireless communication module are installed above the frame. The single-chip control system realizes wireless communication with the power supply and storage system, the driving system and the detection component through the wireless communication module, and a reserved intelligent computing device loading area is also set on the frame. The beneficial effects of the present invention are that it has the characteristics of simple and practical structure, easy disassembly and assembly, simple operation, high processing efficiency, and precise positioning, and can quickly complete the detection and evaluation of surface flatness.

[0004] When the intelligent flatness detection and analysis device in the above patent is used for paved structures such as asphalt or cement pavements, it is difficult to perform a multi-faceted measurement process on the detection point position. Traditional detection methods usually rely on the movement of the device on the surface of the paved structure to measure the distance from the road surface and then evaluate its levelness. However, this method is often affected by vibrations and bumps during the movement of the device in actual operation, resulting in limited reliability of the measurement results.

[0005] When the flatness intelligent detection and analysis device in the above patent is used for a pavement structure such as an asphalt or cement pavement, it is difficult to perform a multi-faceted measurement process on the detection point position. The existing detection device usually moves on the pavement structure to measure its levelness by detecting the distance from the pavement structure. The measurement process may have errors due to vibration and bumps during the movement of the device. Therefore, it is difficult to ensure the accuracy of the detection result. Specifically, it is difficult for existing devices to maintain a stable measurement benchmark, which may introduce significant errors in the data acquisition process, which not only affects the accuracy of the detection results, but also limits the comprehensive evaluation of the actual state of the pavement structure. Therefore, an intelligent detection and analysis device for the surface flatness of the pavement structure is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an intelligent detection and analysis device for the surface flatness of a pavement structure, which has the advantage of performing multiple detections at different positions on the same horizontal line to ensure the accuracy of the detection structure, thereby solving the problem of difficulty in ensuring the accuracy of the detection results.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: an intelligent detection and analysis device for the surface flatness of a pavement structure, comprising a base arranged on a bracket and a laser distance measuring sensor arranged on the base for distance measurement, the laser distance measuring sensor being electrically connected to a data receiving and processing module, and a measuring structure for measuring the flatness of a pavement surface at multiple angles being arranged on the base; The measuring structure comprises an arc-shaped directional support frame arranged above the base, a top cavity column is fixedly connected to the arc-shaped directional support frame, a traverse seat freely moving in the horizontal direction is arranged on one side of the top cavity column, and a fixed pendulum assembly driving the laser distance measuring sensor to swing back and forth in a fan-shaped trajectory in the vertical direction is arranged on the spiral adjustment groove; The top cavity column is provided with a lateral extension component for adjusting the horizontal position of the traverse seat and driving the fixed pendulum component to operate; a side extension plate is fixedly connected to the top cavity column on the side facing the traverse seat; a side block is fixedly connected to the traverse seat; a lateral sliding groove is provided on the side extension plate for the side block to slide in the horizontal direction; a swing angle component for adjusting the horizontal inclination angle of the arc-shaped directional support frame is provided on the base.

[0008] Preferably, the fixed pendulum assembly includes a swing plate that rotates freely in the vertical direction, the swing plate rotates on the traverse seat with a fixed axis, and the traverse seat is provided with a swing rod, the swing rod rotates on the traverse seat with a fixed axis, and the laser distance sensor is fixedly connected to the swing rod; A positioning pin is fixedly connected to a side of the positioning plate facing the swing rod, and a yielding groove for the positioning pin to be slidably connected is provided on the swing rod.

[0009] Preferably, the lateral extension assembly includes a connecting column that reciprocates in the horizontal direction and rotates freely at the end of the horizontal stroke, the connecting column slides through the top cavity column and the connecting column rotates on the traverse seat with a fixed axis; A worm is fixedly sleeved on the connecting column, the worm is meshingly connected with a worm wheel, and the worm wheel is coaxially fixed with the positioning plate.

[0010] Preferably, the horizontal extension assembly further comprises an end plate coaxially fixed with the connecting column, a guide column is fixedly connected to the end plate, a convex block is fixedly connected to the end plate, and a left annular positioning groove and a right annular positioning groove are provided on the top cavity column for the convex block to be slidably connected in the vertical direction; The top cavity column is also provided with a guide groove for the convex block to be slidably connected in the horizontal direction, and the two ends of the guide groove are respectively connected with the left annular positioning groove and the right annular positioning groove.

[0011] Preferably, the top cavity column is provided with a rack which can move freely in the horizontal direction, and a positioning pin is fixedly connected to the rack on one side facing the guide column, and a spiral positioning groove for sliding connection of the positioning pin is provided on the guide column.

[0012] Preferably, a gear driven by a motor to rotate freely is provided above the guide column, the fixed axis rotation axis of the gear is on the top cavity column, and the gear is meshed and connected with the rack; A sliding frame is fixedly connected to the top cavity column, and a rectangular groove for horizontal sliding connection of the rack is provided on the sliding frame.

[0013] Preferably, the swing angle assembly includes an inner seat that moves freely in the horizontal direction, the lower surface of the inner seat is in sliding contact with the base, a connecting rod is provided on the inner seat, and both ends of the connecting rod are respectively fixedly rotated on the arc-shaped directional support frame and the inner seat.

[0014] Preferably, the arc-shaped directional support frame is fixedly rotated on a base, a threaded rod transmission-connected to the gear is provided on the base, both ends of the threaded rod are fixedly rotated on the base, and the threaded rod is threadedly connected to the inner seat.

[0015] Preferably, the data receiving and processing module is electrically connected to a terminal module, the terminal module receives the detection signal of the laser ranging sensor in real time, and the laser ranging sensor provides the distance data of the detected pavement structure; The data processing module processes the received signal, calibrates and filters the distance data of the laser ranging sensor to obtain the accurate distance of the pavement structure. The terminal module generates a distance curve graph between the pavement structure and the terminal module through the processed distance data.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a measuring structure to drive the laser ranging sensor to swing back and forth on a fan-shaped track, and can perform multiple detections at different positions on the same horizontal line to comprehensively evaluate the flatness of the pavement structure. This multi-point detection can effectively capture the height changes at different positions, ensure the comprehensiveness and accuracy of the detection results, and thus provide reliable data support for pavement maintenance.

[0017] The present invention adopts an innovative arc-shaped directional support frame and a transverse extension component to realize multi-angle and multi-position measurement of the laser ranging sensor. This flexibility means that the detection process is no longer limited to fixed measurement points, but can perform multi-dimensional evaluation of the pavement structure according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the components of the arc-shaped directional support frame of the present invention; Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the components where the traverse seat of the present invention is located; Figure 5 It is a schematic diagram of the components where the swing rod of the present invention is located; Figure 6 This is a schematic diagram of the components where the end plate of the present invention is located; Figure 7 This is a schematic diagram of the component where the guide groove of the present invention is located; Figure 8 It is a schematic diagram of the components where the connecting rod of the present invention is located; Fig. 9 It is a schematic diagram of the swing state of the laser ranging sensor of the present invention.

[0019] In the figure: 1. base; 2. arc-shaped directional support frame; 3. top cavity column; 4. guide column; 5. adjustment pin; 6. spiral adjustment groove; 7. rack; 8. gear; 9. slide frame; 10. end plate; 11. convex block; 12. connecting column; 13. left annular positioning groove; 14. right annular positioning groove; 15. guide groove; 16. traverse seat; 17. side block; 18. side extension plate; 19. worm wheel; 20. worm; 21. swing plate; 22. same-position pin; 23. swing rod; 24. give way groove; 25. laser ranging sensor; 26. threaded rod; 27. inner seat; 28. connecting rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 9 The present invention provides a technical solution: an intelligent detection and analysis device for the surface flatness of a pavement structure, comprising a base 1 arranged on a bracket and a laser distance sensor 25 for distance measurement arranged on the base 1, the laser distance sensor 25 is electrically connected to a data receiving and processing module, and a measuring structure for multi-angle measurement of the pavement flatness is arranged on the base 1; The measuring structure comprises an arc-shaped directional support frame 2 arranged above the base 1, a top cavity column 3 is fixedly connected to the arc-shaped directional support frame 2, a traverse seat 16 that can freely move in the horizontal direction is provided on one side of the top cavity column 3, and a fixed pendulum assembly that drives the laser distance measuring sensor 25 to reciprocate in a fan-shaped trajectory in the vertical direction is provided on the spiral adjustment groove 6; The top cavity column 3 is provided with a lateral extension component for adjusting the horizontal position of the traverse seat 16 and driving the fixed pendulum component to operate. The top cavity column 3 is fixedly connected with a side extension plate 18 on the side facing the traverse seat 16. The traverse seat 16 is fixedly connected with a side block 17. The side extension plate 18 is provided with a transverse sliding groove for the side block 17 to slide in the horizontal direction. The base 1 is provided with a swing angle component for adjusting the horizontal inclination angle of the arc-shaped directional support frame 2.

[0022] like Figure 1 and Figure 2 As shown, when the flatness of the pavement structure is detected and analyzed, the bracket is erected on the pavement structure to ensure the stability of the bracket while ensuring that the base 1 thereon is in a horizontal state. The laser ranging sensor 25 is driven to swing back and forth in the vertical direction through the fixed pendulum assembly. In the initial state, the laser ranging sensor 25 is vertically oriented. At this time, the distance between the laser ranging sensor 25 and the pavement structure is at a minimum value. As the laser ranging sensor 25 swings, when the laser ranging sensor 25 gradually moves away from the mid-vertical line, the distance data detected by the laser ranging sensor 25 gradually increases.

[0023] At the same time, the horizontal position of the traverse seat 16 and the laser distance sensor 25 thereon is adjusted by the lateral extension assembly provided on the top cavity column 3, so that the laser distance sensor 25 can perform multiple detections at different positions at the same horizontal height to improve the accuracy of the detection data. Through multiple detection data, the flatness of the detection point position can be comprehensively evaluated to avoid errors caused by single detection.

[0024] Among them, the laser ranging sensor 25 in the initial state is perpendicular to the pavement structure. After the horizontal height detection is completed, the horizontal inclination angle of the arc-shaped directional support frame 2 and the traverse seat 16 thereon and the laser ranging sensor 25 is adjusted by the swing angle assembly, so that the light beam emitted by the laser ranging sensor 25 can be tilted to irradiate the pavement structure. The purpose is that if the inclination angle of the laser ranging sensor 25 remains unchanged, it can determine the abnormal height position at the pavement structure through the detection process on the same horizontal plane, but it is difficult to determine the width of the abnormal height.

[0025] Therefore, by swinging the angle component, the horizontal line of multiple detections can be changed under the premise that the position of the bracket remains unchanged. Furthermore, during the detection process, by detecting the abnormal height position and continuously changing the inclination angle of the laser ranging sensor 25 for multiple times, the width of the abnormal height can be determined to avoid the detection deviation caused by the accidental abnormal height position.

[0026] In one of the more preferred embodiments, the fixed pendulum assembly includes a swing plate 21 that rotates freely in the vertical direction, the swing plate 21 rotates on the traverse seat 16 with a fixed axis, and the traverse seat 16 is provided with a swing rod 23, the swing rod 23 rotates on the traverse seat 16 with a fixed axis, and the laser distance sensor 25 is fixedly connected to the swing rod 23; A positioning pin 22 is fixedly connected to one side of the positioning plate 21 facing the swing rod 23 , and a clearance groove 24 for the positioning pin 22 to be slidably connected is provided on the swing rod 23 .

[0027] like Figure 1 , Figure 2 , Figure 5 and Fig. 9 As shown, when the positioning plate 21 rotates freely in the vertical direction, it can drive the alignment pin 22 thereon to rotate synchronously, wherein the alignment pin 22 is slidably connected to the rocker arm 23 through the clearance groove 24, and the end of the rocker arm 23 away from the alignment pin 22 rotates on the traverse seat 16 with a fixed axis. Therefore, the free rotation process of the positioning plate 21 can drive the rocker arm 23 and the laser ranging sensor 25 arranged thereon to swing back and forth in a fan-shaped trajectory in the vertical direction.

[0028] It should be noted that, in actual use, the light source emission point of the laser ranging sensor 25 should be roughly consistent with the rotation point of the pendulum 23, so as to reduce the error caused by the rotation of the pendulum 23. Fig. 9 As shown, if the laser ranging sensor 25 rotates a fixed angle of N in the vertical direction, its scanning distance on the paved structure is Z, and the value of Z gradually increases when it is away from the perpendicular midline. Therefore, when the swinging speed of the laser ranging sensor 25 remains unchanged, when it swings away from the perpendicular midline, the value of its scanning distance Z gradually increases, and then when detecting the unit distance in the paved structure, its detection time is too short and an error occurs.

[0029] Therefore, if Fig. 9As shown, the rotation speed of the positioning plate 21 in the vertical direction remains unchanged, while the swing speed of the pendulum rod 23 and the laser ranging sensor 25 in the vertical direction is related to the displacement D of the co-location pin 22 in the horizontal direction. When the positioning plate 21 rotates by a unit angle M, the value of the horizontal displacement D of its co-location pin 22 is different. When the co-location pin 22 gradually moves away from the perpendicular midline, the value of the horizontal displacement D of the co-location pin 22 gradually decreases. Therefore, when the co-location pin 22 gradually moves away from the perpendicular midline, the swing speed of the pendulum rod 23 and the laser ranging sensor 25 gradually decreases.

[0030] Furthermore, when the orientation of the laser distance measuring sensor 25 is closer to the perpendicular bisector, the scanned distance Z when it rotates by a unit angle N is smaller. Therefore, when the orientation of the laser distance measuring sensor 25 is close to the perpendicular bisector, its swing rate is faster. On the contrary, when the orientation of the laser distance measuring sensor 25 is away from the perpendicular bisector, its swing speed is slower. Furthermore, through the change of the horizontal displacement D of the co-location pin 22, the swing arm 23 and the laser distance measuring sensor 25 are driven to have different swing speeds in different orientations, so as to ensure that when detecting the pavement structure, a relatively uniform detection speed can be achieved on the same horizontal line, so as to avoid result errors caused by excessive differences in detection speeds.

[0031] Based on the embodiment of the fixed pendulum assembly, the lateral extension assembly includes a connecting column 12 that reciprocates in the horizontal direction and rotates freely at the end of the horizontal stroke, the connecting column 12 slides through the top cavity column 3 and the connecting column 12 rotates on the traverse seat 16 with a fixed axis; A worm 20 is fixedly sleeved on the connecting column 12 , and the worm 20 is meshingly connected with a worm wheel 19 . The worm wheel 19 is coaxially fixed with the positioning plate 21 .

[0032] The horizontal extension assembly also includes an end plate 10 coaxially fixed with the connecting column 12, a guide column 4 is fixedly connected to the end plate 10, a convex block 11 is fixedly connected to the end plate 10, and a left annular positioning groove 13 and a right annular positioning groove 14 are provided on the top cavity column 3 for the convex block 11 to slide in the vertical direction; The top cavity column 3 is also provided with a guide groove 15 for the convex block 11 to slide and connect in the horizontal direction, and the two ends of the guide groove 15 are respectively connected to the left annular positioning groove 13 and the right annular positioning groove 14.

[0033] like Figure 1 , Figure 4 , Figure 6 and Figure 7As shown, when the end plate 10 and the convex block 11 correspond to the left-hand annular positioning groove 13 or the right-hand annular positioning groove 14 respectively, they can drive the connecting column 12 to rotate in the vertical direction, wherein a worm 20 is fixedly sleeved on the connecting column 12, and the worm 20 is meshingly connected with a worm wheel 19. Therefore, the rotation of the end plate 10 drives the worm wheel 19 and the positioning plate 21 coaxially arranged with the worm wheel 19 to rotate, thereby driving the fixed pendulum assembly to operate, wherein the single rotation angle of the positioning plate 21 is an integer multiple of 360 degrees, so as to ensure that the laser ranging sensor 25 can swing to the initial position again, that is, swing to the vertical orientation state.

[0034] Furthermore, the top cavity column 3 is provided with a rack 7 which can move freely in the horizontal direction, and the rack 7 is fixedly connected with an adjustment pin 5 on one side facing the guide column 4, and the guide column 4 is provided with a spiral adjustment groove 6 for the adjustment pin 5 to be slidably connected.

[0035] A gear 8 driven by a motor to rotate freely is provided above the guide column 4, the fixed axis rotation axis of the gear 8 is on the top cavity column 3, and the gear 8 is meshedly connected with the rack 7; The top cavity column 3 is fixedly connected with a slide frame 9, and the slide frame 9 is provided with a rectangular groove for the rack 7 to be horizontally slidably connected.

[0036] like Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, the gear 8 is driven by the motor to rotate freely, thereby driving the rack 7 meshing with the gear 8 to reciprocate in the horizontal direction. In the initial state, the convex block 11 corresponds to the contact position of the left annular positioning groove 13 and the guide groove 15. When the rack 7 drives the adjustment pin 5 thereon to move toward the side of the top cavity column 3, the convex block 11 slides on the guide groove 15, so the adjustment pin 5 will not slide on the spiral adjustment groove 6.

[0037] With the continuous movement of the rack 7 and the adjusting pin 5, the convex block 11 moves to the position of the right-hand annular positioning groove 14. At this time, the convex block 11 and the end plate 10 are restricted by the right-hand annular positioning groove 14 and cannot continue to move horizontally. At this time, the adjusting pin 5 slides on the spiral adjusting groove 6 during the subsequent horizontal movement, thereby driving the guide column 4, the end plate 10 and the connecting column 12 to rotate in the vertical direction, so as to drive the fixed pendulum assembly to operate through the rotation of the connecting column 12.

[0038] Similarly, when the rack 7 moves horizontally away from the top cavity column 3, the convex block 11 first slides on the guide groove 15 to move synchronously with the adjusting pin 5. Later, when the convex block 11 corresponds to the position of the left annular positioning groove 13, it can drive the connecting column 12 to rotate under the drive of the adjusting pin 5. Through this movement mode, the horizontal position of the laser ranging sensor 25 can be changed through the connecting column 12 and the traverse seat 16, and the fixed pendulum assembly can be driven to operate when the laser ranging sensor 25 is at the terminal end of the horizontal stroke, so as to promote the detection process when the position of the laser ranging sensor 25 no longer changes, thereby realizing multiple continuous measurement processes on the same horizontal line.

[0039] Based on the embodiment of the transverse extension component, the swing angle component includes an inner seat 27 that can move freely in the horizontal direction, and the lower surface of the inner seat 27 is in sliding contact with the base 1. A connecting rod 28 is provided on the inner seat 27, and the two ends of the connecting rod 28 are respectively rotated on the arc-shaped directional support frame 2 and the inner seat 27.

[0040] The arc-shaped directional support frame 2 rotates on the base 1 with a fixed axis. The base 1 is provided with a threaded rod 26 that is transmission-connected to the gear 8. Both ends of the threaded rod 26 rotate on the base 1 with a fixed axis. The threaded rod 26 is threadedly connected to the inner seat 27.

[0041] like Figure 7 and Figure 8 As shown, in the initial state, the arc-shaped directional support frame 2 is in a horizontal state. When the laser ranging sensor 25 completes the detection on a single horizontal line, the rotation process of the gear 8 can drive the laser ranging sensor 25 connected to it to rotate, thereby changing the relative position between the inner seat 27 and the arc-shaped directional support frame 2, thereby driving the connecting rod 28 to deflect, so as to cause the arc-shaped directional support frame 2 to rotate on the base 1, thereby changing the inclination angle of the arc-shaped directional support frame 2 and its upper top cavity column 3, the traverse seat 16 and the laser ranging sensor 25.

[0042] At the same time, when the inclination angle of the laser ranging sensor 25 changes, it changes synchronously with the distance value of the pavement structure in the initial state. At the same time, the scanning straight line position of the laser ranging sensor 25 on the pavement structure changes. Therefore, the inclination angle of the laser ranging sensor 25 is changed multiple times to avoid the deviation phenomenon caused by single position detection.

[0043] It should be noted that, in actual use, the horizontal inclination angle of the arc-shaped directional support frame 2 changes slightly, wherein the gear 8 will tilt synchronously with the top cavity column 3, but the threaded rod 26 is always in a horizontal state. Therefore, transmission can be carried out through a belt with a certain elastic deformation between the two to ensure that the two always maintain a transmission connection, and the swing angle assembly and the horizontal extension assembly operate alternately, so that when the fixed swing assembly is running, the horizontal inclination angle of its laser ranging sensor 25 will not change.

[0044] Furthermore, the data receiving and processing module is electrically connected to a terminal module, and the terminal module receives the detection signal of the laser distance sensor 25 in real time, and the laser distance sensor 25 provides the distance data of the detected pavement structure; The data processing module processes the received signal, calibrates and filters the distance data of the laser ranging sensor 25 to obtain the accurate distance of the pavement structure. The terminal module generates a distance curve diagram between the pavement structure and the processed distance data.

[0045] The data processing module performs in-depth processing on the received signals, including data calibration and filtering. The calibration process ensures that the data output by the sensor meets the preset standards and improves the accuracy of the measurement by adjusting possible system errors. Filtering technology is used to remove noise and interference signals to ensure that the distance data obtained is smoother and more reliable. Through these processing steps, the module can generate accurate pavement structure distance information, laying a solid foundation for subsequent analysis.

[0046] Ultimately, the processed distance data will generate a distance curve graph between the pavement structure and the terminal module. The curve graph intuitively shows the height changes of the pavement structure at different locations, allowing users to quickly identify changes in flatness and abnormal points. This visualization result not only helps staff to monitor and evaluate the status of the pavement structure in real time, but also provides a scientific basis for maintenance and repair, and improves the efficiency and accuracy of pavement structure management.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent detection and analysis device for the surface flatness of a pavement structure, comprising a base (1) arranged on a bracket and a laser distance sensor (25) for distance measurement arranged on the base (1), the laser distance sensor (25) being electrically connected to a data receiving and processing module, characterized in that: The base (1) is provided with a measuring structure for measuring the flatness of the pavement surface at multiple angles; The measuring structure comprises an arc-shaped directional support frame (2) arranged above a base (1), a top cavity column (3) is fixedly connected to the arc-shaped directional support frame (2), a traverse seat (16) that can freely move in the horizontal direction is provided on one side of the top cavity column (3), and a fixed pendulum assembly that drives the laser distance measuring sensor (25) to reciprocate in a fan-shaped trajectory in the vertical direction is provided on the spiral adjustment groove (6); The top cavity column (3) is provided with a transverse extension component for adjusting the horizontal position of the traverse seat (16) and driving the fixed pendulum component to operate; the top cavity column (3) is fixedly connected with a side extension plate (18) on the side facing the traverse seat (16); the traverse seat (16) is fixedly connected with a side block (17); the side extension plate (18) is provided with a transverse sliding groove for the side block (17) to be slidably connected in the horizontal direction; and the base (1) is provided with a swing angle component for adjusting the horizontal inclination angle of the arc-shaped directional support frame (2).

2. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 1 is characterized in that: The fixed pendulum assembly comprises a swing plate (21) which rotates freely in a vertical direction, the swing plate (21) rotates on a traversing seat (16) with a fixed axis, and a swing rod (23) is provided on the traversing seat (16), the swing rod (23) rotates on a fixed axis on the traversing seat (16), and a laser distance measuring sensor (25) is fixedly connected to the swing rod (23); A positioning pin (22) is fixedly connected to one side of the positioning plate (21) facing the swing rod (23), and a clearance groove (24) for the positioning pin (22) to be slidably connected is provided on the swing rod (23).

3. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 2 is characterized in that: The lateral extension assembly comprises a connecting column (12) which reciprocates in the horizontal direction and rotates freely at the end of the horizontal stroke, the connecting column (12) slides through the top cavity column (3) and the connecting column (12) rotates on the lateral seat (16) with a fixed axis; A worm (20) is fixedly sleeved on the connecting column (12), the worm (20) is meshingly connected with a worm wheel (19), and the worm wheel (19) and the positioning plate (21) are coaxially fixed.

4. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 3 is characterized by: The horizontal extension assembly also includes an end plate (10) coaxially fixed with the connecting column (12), a guide column (4) is fixedly connected to the end plate (10), a convex block (11) is fixedly connected to the end plate (10), and a left annular positioning groove (13) and a right annular positioning groove (14) are provided on the top cavity column (3) for the convex block (11) to be slidably connected in the vertical direction; The top cavity column (3) is also provided with a guide groove (15) for the convex block (11) to be slidably connected in the horizontal direction, and the two ends of the guide groove (15) are respectively connected to the left annular positioning groove (13) and the right annular positioning groove (14).

5. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 4 is characterized in that: The top cavity column (3) is provided with a rack (7) that can move freely in the horizontal direction, and the rack (7) is fixedly connected with an adjustment pin (5) on one side facing the guide column (4), and the guide column (4) is provided with a spiral adjustment groove (6) for the adjustment pin (5) to be slidably connected.

6. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 5, characterized in that: A gear (8) driven by a motor to rotate freely is provided above the guide column (4); the fixed axis rotation axis of the gear (8) is on the top cavity column (3); the gear (8) is meshingly connected with the rack (7); The top cavity column (3) is fixedly connected with a sliding frame (9), and the sliding frame (9) is provided with a rectangular groove for the rack (7) to be horizontally slidably connected.

7. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 6, characterized in that: The swing angle assembly comprises an inner seat (27) that moves freely in the horizontal direction, the lower surface of the inner seat (27) is in sliding contact with the base (1), a connecting rod (28) is provided on the inner seat (27), and the two ends of the connecting rod (28) are respectively fixedly rotated on the arc-shaped directional support frame (2) and the inner seat (27).

8. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 7 is characterized by: The arc-shaped directional support frame (2) is fixedly rotated on the base (1), and a threaded rod (26) is provided on the base (1) and is transmission-connected to the gear (8). Both ends of the threaded rod (26) are fixedly rotated on the base (1), and the threaded rod (26) is threadedly connected to the inner seat (27).

9. The intelligent detection and analysis device for surface smoothness of a pavement structure according to claim 8, characterized in that: The data receiving and processing module is electrically connected to a terminal module, and the terminal module receives a detection signal from a laser distance measuring sensor (25) in real time, and the laser distance measuring sensor (25) provides distance data of the detected pavement structure; The data processing module processes the received signal, calibrates and filters the distance data of the laser distance measuring sensor (25) to obtain an accurate distance of the pavement structure, and the terminal module generates a distance curve diagram between the pavement structure and the terminal module through the processed distance data.

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