Asphalt pavement flatness detection device

Abstract

The invention relates to the technical field of pavement detection, in particular to an asphalt pavement flatness detection device which comprises a movable detection table, and a first detection mechanism, a second detection mechanism and a third detection mechanism are arranged at the bottom of the movable detection table. The first detection mechanism, the second detection mechanism and the third detection mechanism are distributed at equal intervals in the transverse direction of the movable detection table and are all provided with corresponding detection modules; the detection modules corresponding to the first detection mechanism, the second detection mechanism and the third detection mechanism are distributed in a parallel and level mode in the transverse direction of the movable detection table, and the problems that a hand-push type detection device adopts a front wheel and a rear wheel at a fixed interval to move and adopts a single sensor at the bottom to detect, and the base plane of the sensor changes due to the uneven road surface; therefore, the comprehensiveness and the accuracy of a detection result are influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface detection, and more specifically, it relates to a device for detecting the evenness of asphalt road surfaces. Background Art

[0002] When detecting the evenness of road surfaces, traditional hand-pushed detection devices usually move with front and rear wheels at a fixed spacing, and a single sensor is installed at the bottom to detect the evenness of the road surface. This detection method is convenient in operation, but there are also obvious deficiencies.

[0003] First of all, since the detection device only relies on a single sensor for data collection, this leads to relatively single detection results and it is difficult to comprehensively reflect the evenness of the road surface. In actual road surfaces, the evenness conditions are often relatively complex, and there may be fluctuations and undulations in different directions. However, a single sensor can only detect the road surface directly below it and cannot comprehensively capture the three-dimensional evenness information of the road surface.

[0004] Secondly, when the ground is uneven, due to the different walking paths of the front and rear wheels, the base planes they are on will also change. In this case, if a single sensor at the bottom is still used for detection, the base plane of the sensor will change accordingly, which will in turn affect the accuracy of the detection results. Specifically, the height difference between the front and rear wheels will cause the distance between the sensor and the road surface to change, resulting in a deviation between the detected data and the actual evenness of the road surface.

[0005] To solve the above problems, a device for detecting the evenness of asphalt road surfaces is proposed. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] Aiming at the problems existing in the prior art, the present invention provides a device for detecting the evenness of asphalt road surfaces to solve the problems that the hand-pushed detection device in the background art uses front and rear wheels with a fixed spacing for movement and a single sensor at the bottom for detection, and the change of the sensor base plane due to the uneven road surface affects the comprehensiveness and accuracy of the detection results.

[0008] (2) Technical Solutions

[0009] To achieve the above object, the present invention provides the following technical solution: A device for detecting the evenness of asphalt road surfaces, including a mobile detection platform. A first detection mechanism, a second detection mechanism, and a third detection mechanism are arranged at the bottom of the mobile detection platform, and the first detection mechanism, the second detection mechanism, and the third detection mechanism are evenly distributed along the transverse direction of the mobile detection platform;

[0010] The first detection mechanism, the second detection mechanism, and the third detection mechanism are all provided with corresponding detection modules, and the detection modules corresponding to the first detection mechanism, the second detection mechanism, and the third detection mechanism are evenly distributed in the lateral direction of the mobile detection table. The lengths of the first detection mechanism, the second detection mechanism, and the third detection mechanism are set in an arithmetic progression, where the length of the first detection mechanism is the longest, and the detection module corresponding to the first detection mechanism is located at the central position of the bottom of the mobile detection table. One end of the second detection mechanism and one end of the third detection mechanism are both rotatably installed at one end of the first detection mechanism, and the second detection mechanism and the third detection mechanism are distributed on both sides of the first detection mechanism.

[0011] The present invention is further configured such that the first detection mechanism includes a first pulley located at the front end of the bottom of the mobile detection table, and a second pulley provided on the side of the bottom of the mobile detection table away from the first pulley;

[0012] The detection module corresponding to the first detection mechanism includes a first infrared ranging sensor provided at the central position of the bottom of the mobile detection table;

[0013] There are two second pulleys, and the two second pulleys and the first pulley are distributed in a triangular shape at the bottom of the mobile detection table. A connecting bracket is provided between the two second pulleys, and one end of the second detection mechanism and one end of the third detection mechanism are respectively sleeved at both ends of the connecting bracket.

[0014] The present invention is further configured such that the second detection mechanism includes a first sleeve rotatably installed on the connecting bracket, and further includes a first support plate provided on the circumferential side wall of the first sleeve, and a third pulley provided at the end of the first support plate away from the first sleeve;

[0015] The detection module corresponding to the second detection mechanism further includes a second infrared ranging sensor provided on the first support plate.

[0016] The present invention is further configured such that the third detection mechanism includes a second sleeve rotatably installed at the end of the connecting bracket away from the first sleeve, and further includes a second support plate provided on the circumferential side wall of the second sleeve, and a fourth pulley provided at the end of the second support plate away from the second sleeve;

[0017] The detection module corresponding to the third detection mechanism further includes a third infrared ranging sensor provided on the second support plate.

[0018] The present invention is further configured such that the distance from the third pulley to the first sleeve is less than the distance from the first pulley to the connecting bracket, and the distance from the fourth pulley to the second sleeve is less than the distance from the third pulley to the first sleeve;

[0019] The lateral projection distances from the first pulley to the third pulley and from the third pulley to the fourth pulley are the same.

[0020] The present invention is further configured such that a first limiting post is welded on the mounting frame of the third pulley, a first strip-shaped groove is formed at one end of the first support plate away from the first sleeve, and the first strip-shaped groove is slidably matched with the first limiting post;

[0021] A second limiting post is welded on the mounting frame of the fourth pulley, a second strip-shaped groove is formed at one end of the second support plate away from the second sleeve, and the second strip-shaped groove is slidably matched with the second limiting post.

[0022] The present invention is further configured such that a first limiting ring is provided at one end of the circumferential side wall of the first limiting post close to the mounting frame of the third pulley, and a spacing for slidably mounting the first support plate is provided between the first limiting ring and the mounting frame of the third pulley;

[0023] A second limiting ring is provided at one end of the circumferential side wall of the second limiting post close to the mounting frame of the fourth pulley, and a spacing for slidably mounting the second support plate is provided between the second limiting ring and the mounting frame of the fourth pulley.

[0024] The present invention is further configured such that a first limiting hole and a second limiting hole are formed at the bottom of the moving detection table;

[0025] The first limiting hole is correspondingly and movably inserted with the first limiting post, a first retaining ring is provided at the opening of the first limiting hole, a first anti-detachment ring is provided at one end of the first limiting post away from the first limiting ring, and the first anti-detachment ring and the first retaining ring are correspondingly anti-detached;

[0026] The second limiting hole is correspondingly and movably inserted with the second limiting post, a second retaining ring is provided at the opening of the second limiting hole, a second anti-detachment ring is provided at one end of the second limiting post away from the second limiting ring, and the second anti-detachment ring and the second retaining ring are correspondingly anti-detached.

[0027] The present invention is further configured such that a surveying computer is provided at the top of the moving detection table, and the surveying computer is wirelessly transmitted with the first infrared distance measuring sensor, the second infrared distance measuring sensor, and the third infrared distance measuring sensor.

[0028] The present invention is further configured such that a hand-pushing handle is provided at one side of the top of the moving detection table.

[0029] The present invention is further configured such that the detection module further includes a first fixing seat and a second fixing seat, the first fixing seat and the second fixing seat are distributed on both sides of the infrared distance measuring sensor, a winding shaft is installed on the first fixing seat, a winding shaft and a tubular motor for driving the winding shaft to rotate are installed on the second fixing seat, a transparent film is wound around the winding shaft and the winding shaft, and a photosensitive resistor is installed on the surface of the infrared distance measuring sensor;

[0030] A uniform air pipe and a sealing strip distributed around the periphery of the uniform air pipe are arranged on the outer circumference of the infrared ranging sensor, and the uniform air pipe is externally connected with a micro air supply pump through a pipeline.

[0031] (III) Beneficial effects

[0032] Compared with the prior art, the present invention provides an asphalt pavement flatness detection device, which has the following beneficial effects:

[0033] By setting the first detection mechanism, the second detection mechanism and the third detection mechanism with different lengths, and arranging them at equal intervals along the transverse direction of the moving detection table, and setting detection modules on each detection mechanism, the present invention can detect and record multiple fluctuation curves, and select the median data as the flatness reference data of the road surface, so as to more comprehensively analyze the linear flatness and planar flatness of the road surface, and improve the accuracy and reliability of the detection results.

[0034] The present invention respectively installs two fixed seats on both sides of the infrared ranging sensor, installs a winding shaft or an unwinding shaft on the fixed seat, uses the simultaneous winding and unwinding actions of the winding shaft and the unwinding shaft to update the transparent film at the end of the infrared ranging sensor, uses a photosensitive resistor to identify the light transmission amount of the transparent film to judge whether it is necessary to perform the operation of winding and unwinding to update the transparent film, and at the same time, in order to reduce the friction between the transparent film and the sealing strip during the replacement operation, uses a micro air supply pump to blow the transparent film, and the sealing strip will turn outwards and exhaust under the action of the internal pressure, and will not cause deformation of the transparent film. In this way, the sealing strip and the transparent film are separated and there is no friction during the update. When the blowing operation stops, the sealing strip automatically resets under its own action and the end fits on the surface to achieve waterproof and dustproof treatment. Description of the drawings

[0035] Figure 1 It is a schematic diagram of the overall structure of the asphalt pavement flatness detection device.

[0036] Figure 2 It is a schematic diagram of the bottom inclined upward view structure of the asphalt pavement flatness detection device.

[0037] Figure 3 It is a schematic diagram of the upward view structure of the first detection mechanism in the asphalt pavement flatness detection device.

[0038] Figure 4 It is a schematic diagram of the upward view structure of the first detection mechanism, the second detection mechanism and the third detection mechanism.

[0039] Figure 5 For Figure 4 The partial cross-sectional structure schematic diagram at a-a in

[0040] Figure 6Schematic diagram of the distribution structure of the first testing institution, the second testing institution, and the third testing institution.

[0041] Figure 7 Distribution position diagram of the fixed seat and the infrared distance sensor.

[0042] Figure 8 Bottom view of the infrared distance sensor

[0043] In the figure: 1. Mobile testing platform; 101. First limiting hole; 102. Second limiting hole; 103. First retaining ring; 104. Second retaining ring; 2. First testing institution; 201. First pulley; 202. Second pulley; 203. Connecting bracket; 3. Second testing institution; 301. First sleeve; 302. First support plate; 303. Third pulley; 304. First limiting post; 305. First strip-shaped groove; 306. First limiting ring; 307. First anti-disengagement ring; 4. Third testing institution; 401. Second sleeve; 402. Second support plate; 403. Fourth pulley; 404. Second limiting post; 405. Second strip-shaped groove; 406. Second limiting ring; 407. Second anti-disengagement ring; 5. Detection module; 501. First infrared distance sensor; 502. Second infrared distance sensor; 503. Third infrared distance sensor; 6. Surveying and mapping computer; 7. Hand push handle; 8. First fixed seat; 9. Second fixed seat; 10. Micro air supply pump; 11. Pay-off reel; 12. Tubular motor; 13. Take-up reel; 14. Photoresistor; 15. Transparent film; 16. Uniform air pipe. Detailed implementation mode

[0044] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0045] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0046] In the present invention, unless otherwise stated, the orientations such as "upper, lower" are usually in the directions shown in the drawings, or in the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left, right" are usually left and right as shown in the drawings; "inside, outside" refer to the inside and outside relative to the contours of the respective components, but the above orientation terms are not used to limit the present invention.

[0047] Embodiment, please refer to Figure 1 - Figure 6, an asphalt pavement evenness detection device, including a mobile detection platform 1. A first detection mechanism 2, a second detection mechanism 3, and a third detection mechanism 4 are arranged at the bottom of the mobile detection platform 1, and the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 are evenly spaced along the transverse direction of the mobile detection platform 1;

[0048] Corresponding detection modules 5 are provided for the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4. The detection modules 5 corresponding to the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 are flush along the transverse direction of the mobile detection platform 1. The lengths of the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 are set in an arithmetic progression. Among them, the length of the first detection mechanism 2 is the longest, and the detection module 5 corresponding to the first detection mechanism 2 is located at the center position of the bottom of the mobile detection platform 1. One end of the second detection mechanism 3 and one end of the third detection mechanism 4 are rotatably installed at one end of the first detection mechanism 2, and the second detection mechanism 3 and the third detection mechanism 4 are distributed on both sides of the first detection mechanism 2.

[0049] Specifically, the first detection mechanism 2 has the longest length, and the lengths of the second detection mechanism 3 and the third detection mechanism 4 are in arithmetic progression with that of the first detection mechanism 2. At the same time, one end of the second detection mechanism 3 and one end of the third detection mechanism 4 are rotatably installed at one end of the first detection mechanism 2. When the mobile detection platform 1 is pushed forward on the ground, the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 will form three basic detection planes at different angles due to the unevenness of the road surface. Here, we set the basic detection plane of the first detection mechanism 2 as plane a, the basic detection plane of the second detection mechanism 3 as plane b, and the basic detection plane of the third detection mechanism 4 as plane c. In addition, the detection modules 5 on the three basic detection planes with different angles formed by the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 are flush. Then, when the transverse direction of the road surface at the detection position is in a flat state, due to the different angles of the abc three basic detection planes, the detection modules 5 on the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 can detect three different groups of data. As the mobile detection platform 1 moves forward, the measurement point data is connected into a line. Through the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4, three fluctuation curves can be detected and recorded. The median data is selected from the three fluctuation curves as the flatness reference data H of the road surface. Those greater than this data are the convex parts of the road surface, and those less than this data are the concave parts of the road surface. In this way, the linear flatness of the forward road surface is analyzed. At the same time, according to the three fluctuation curves evenly spaced in the transverse direction, the three data lines can be connected into a plane, combined with the data of the linear flatness of the forward road surface, and then the flatness of the road surface can be accurately analyzed.

[0050] Further, the road surface where the aligned ends of the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 are located is flat, that is, the transverse direction of the road surface is in a flat state. If the road surface heights at the other ends of the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 with equal differences are different, the angles of the three basic planes a, b, and c are different, so that the detection module 5 with transverse alignment detects different distances of the road surface. Combining the data of the three groups to analyze the position flatness data h of the transverse road surface. For example, the data detected by the detection module 5 of the a plane is a1, the data detected by the detection module 5 of the b plane is b1, and the data detected by the detection module 5 of the c plane is c1. Thus, it can be obtained that h = (a1 + b1 + c1) / 3 - H.

[0051] The first detection mechanism 2 includes a first pulley 201 located at the front end of the bottom of the mobile detection platform 1, and a second pulley 202 arranged on one side of the bottom of the mobile detection platform 1 away from the first pulley 201;

[0052] The detection module 5 corresponding to the first detection mechanism 2 includes a first infrared distance sensor 501 arranged at the center position of the bottom of the mobile detection platform 1;

[0053] There are two second pulleys 202, and the two second pulleys 202 and the first pulley 201 are distributed in a triangle at the bottom of the mobile detection platform 1. A connecting bracket 203 is arranged between the two second pulleys 202, and one ends of the second detection mechanism 3 and the third detection mechanism 4 are respectively sleeved at both ends of the connecting bracket 203.

[0054] The first pulley 201 and the two second pulleys 202 are distributed in a triangle at the bottom of the mobile detection platform 1. Through the structural design of the triangle, not only the stability of the detection equipment is enhanced, but also its anti-rollover ability is greatly improved. Even on an uneven road surface, the device can move forward smoothly without deviating from the detection track.

[0055] The first infrared distance sensor 501 can measure the distance between the road surface and the sensor in real time and accurately, so as to accurately reflect the flatness of the road surface. Moreover, the first infrared distance sensor 501 is located at the center position, and its measurement result is more representative and can more truly reflect the overall flatness of the road surface.

[0056] Both ends of the connecting bracket 203 are respectively welded to one side of the mounting brackets of two second pulleys 202, and the axis of the connecting bracket 203 and the second pulley 202 is located in the same vertical plane. In the state of a flat road surface, one end of the second detection mechanism 3 and one end of the third detection mechanism 4 are flush with one end of the first detection mechanism 2 through the connecting bracket 203. The distances from the first pulley 201, the other end of the second detection mechanism 3, and the other end of the third detection mechanism 4 to the vertical plane where the connecting bracket 203 is located are set in an arithmetic progression. At the same time, on a flat road surface, the distances from the first infrared distance sensor 501 and the detection module 5 on the second detection mechanism 3 and the third detection mechanism 4 to the vertical plane where the connecting bracket 203 is located are the same, and the distances to the ground are also the same. Therefore, when the road surface is uneven, after the first pulley 201, the end of the second detection mechanism 3 far from the connecting bracket 203, and the end of the third detection mechanism 4 far from the connecting bracket 203 are located at different positions, planes a, b, and c with different angles are formed. Then, through the analysis of the three detection data, more accurate flatness data is generated.

[0057] The second detection mechanism 3 includes a first sleeve 301 rotatably mounted on the connecting bracket 203, and further includes a first support plate 302 provided on the circumferential side wall of the first sleeve 301, and a third pulley 303 provided at one end of the first support plate 302 far from the first sleeve 301;

[0058] The detection module 5 corresponding to the second detection mechanism 3 includes a second infrared distance sensor 502 provided on the first support plate 302.

[0059] The first sleeve 301 and the connecting bracket 203 are in a matching fit, and the first sleeve 301 and the first support plate 302 are formed by welding. The second infrared distance sensor 502 and the first infrared distance sensor 501 are located on the same horizontal straight line.

[0060] The third detection mechanism 4 includes a second sleeve 401 rotatably mounted on one end of the connecting bracket 203 far from the first sleeve 301, and further includes a second support plate 402 provided on the circumferential side wall of the second sleeve 401, and a fourth pulley 403 provided at one end of the second support plate 402 far from the second sleeve 401;

[0061] The detection module 5 corresponding to the third detection mechanism 4 includes a third infrared distance sensor 503 provided on the second support plate 402.

[0062] The second sleeve 401 and the connecting bracket 203 are in a matching fit, and the second sleeve 401 and the second support plate 402 are formed by welding. The third infrared distance measuring sensor 503, the first infrared distance measuring sensor 501, and the second infrared distance measuring sensor 502 are located on the same horizontal straight line. When the road surface is in a flat state, the distances from the first infrared distance measuring sensor 501, the second infrared distance measuring sensor 502, and the third infrared distance measuring sensor 503 to the ground are the same. The distance from the third pulley 303 to the first sleeve 301 is less than the distance from the first pulley 201 to the connecting bracket 203, and the distance from the fourth pulley 403 to the second sleeve 401 is less than the distance from the third pulley 303 to the first sleeve 301;

[0063] The lateral projection distance from the first pulley 201 to the third pulley 303 is the same as the lateral projection distance from the third pulley 303 to the fourth pulley 403.

[0064] The first pulley 201, the third pulley 303, and the fourth pulley 403 with the same projection distance difference enable the first detection mechanism 2, the second detection mechanism 3, and the third detection mechanism 4 to be located at different road surface positions, thus forming different basic detection planes. Thereby, the fluctuation data of the current road surface is detected by the first infrared distance measuring sensor 501, the second infrared distance measuring sensor 502, and the third infrared distance measuring sensor 503, and more accurate road surface flatness is obtained through the analysis of three groups of different data.

[0065] A first limiting post 304 is welded on the mounting bracket of the third pulley 303. A first strip-shaped groove 305 is formed at one end of the first support plate 302 away from the first sleeve 301, and the first strip-shaped groove 305 and the first limiting post 304 are in sliding fit;

[0066] A second limiting post 404 is welded on the mounting bracket of the fourth pulley 403. A second strip-shaped groove 405 is formed at one end of the second support plate 402 away from the second sleeve 401, and the second strip-shaped groove 405 and the second limiting post 404 are in sliding fit.

[0067] A first limiting ring 306 is arranged at one end of the circumferential side wall of the first limiting post 304 close to the mounting bracket of the third pulley 303, and a spacing for the sliding installation of the first support plate 302 is provided between the first limiting ring 306 and the mounting bracket of the third pulley 303;

[0068] A second limiting ring 406 is arranged at one end of the circumferential side wall of the second limiting post 404 close to the mounting bracket of the fourth pulley 403, and a spacing for the sliding installation of the second support plate 402 is provided between the second limiting ring 406 and the mounting bracket of the fourth pulley 403.

[0069] The bottom of the mobile detection table 1 is provided with a first limiting hole 101 and a second limiting hole 102;

[0070] The first limit hole 101 is movably inserted corresponding to the first limit post 304, and a first retaining ring 103 is arranged at the opening of the first limit hole 101. A first anti - detachment ring 307 is arranged at one end of the first limit post 304 away from the first limit ring 306, and the first anti - detachment ring 307 and the first retaining ring 103 are anti - detachment corresponding to each other.

[0071] The second limit hole 102 is movably inserted corresponding to the second limit post 404, and a second retaining ring 104 is arranged at the opening of the second limit hole 102. A second anti - detachment ring 407 is arranged at one end of the second limit post 404 away from the second limit ring 406, and the second anti - detachment ring 407 and the second retaining ring 104 are anti - detachment corresponding to each other.

[0072] The third pulley 303 is movably inserted into the first limit hole 101 through the first limit post 304, so that the third pulley 303 can only float up and down. The fourth pulley 403 is movably inserted into the second limit hole 102 through the second limit post 404, so that the fourth pulley 403 can only float up and down. Thus, when the first pulley 201, the third pulley 303 and the fourth pulley 403 pass through an uneven road surface, they always maintain an equal - distance position. At the same time, when the first pulley 201, the third pulley 303 and the fourth pulley 403 pass through an uneven road surface, and the first pulley 201, the third pulley 303 and the fourth pulley 403 are on road surfaces with different heights, then the first pulley 201 will drive the mobile detection platform 1 to rotate around the axis of the second pulley 202 and tilt to form a plane a. At the same time, the third pulley 303 will drive the first support plate 302 to rotate around the connecting bracket 203 and tilt to form a plane b, and the fourth pulley 403 will drive the second support plate 402 to rotate around the connecting bracket 203 and tilt to form a plane c. After the mobile detection platform 1, the first support plate 302 and the second support plate 402 rotate, they will drive the first infrared distance sensor 501, the second infrared distance sensor 502 and the third infrared distance sensor 503 on them to rotate, so that the distances from the first infrared distance sensor 501, the second infrared distance sensor 502 and the third infrared distance sensor 503 to the ground change, thereby recording different data, and then analyzing the flatness of the road surface through averaging the three groups of data.

[0073] A surveying computer 6 is arranged at the top of the mobile detection platform 1, and the surveying computer 6 is wirelessly transmitted with the first infrared distance sensor 501, the second infrared distance sensor 502 and the third infrared distance sensor 503.

[0074] The surveying computer 6 has a display screen and can display the detection data in the form of lines in real - time, so as to intuitively see the flatness of the ground.

[0075] A hand - push handle 7 is arranged on one side of the top of the mobile detection platform 1. Through the setting of the hand - push handle 7, it is convenient to push the equipment forward.

[0076] As Figure 7 and Figure 8 shown, during detection, it is easy to cause road surface dust or water splashes on the road surface. The detection module 5 further includes a first fixing seat 8 and a second fixing seat 9. The first fixing seat 8 and the second fixing seat 9 are distributed on both sides of the infrared distance sensor (both sides of the parallel detection path). A film unwinding reel 11 is installed on the first fixing seat 8. A dust-proof cover is arranged outside the film unwinding reel 11. The dust-proof cover is used for dust-proof treatment of the internal transparent film roll 15. The transparent film 15 is released from the outlet of the dust-proof cover. An external release auxiliary roller is arranged inside the dust-proof cover, so that the transparent film 15 is in a certain tension when being released. A film winding reel 13 and a tubular motor 12 for driving the film winding reel 13 to rotate are installed on the second fixing seat 9. The transparent film 15 is wound around the film unwinding reel 11 and the film winding reel 13. A photosensitive resistor 14 is installed on the surface of the infrared distance sensor;

[0077] A uniform air pipe 16 is arranged around the outside of the infrared distance sensor, and a sealing strip 17 is distributed around the uniform air pipe 16. The bottom of the sealing strip 17 gradually moves away from the infrared distance sensor downward. The uniform air pipe 16 is externally connected to a micro air supply pump 10 through a pipeline. The micro air supply pump 10 is fixed on the mounting cotton of the infrared distance sensor.

[0078] During use, when the optical signal captured by the photosensitive resistor 14 drops below the set value, the tubular motor 12 drives the film winding reel 13 to rotate and at the same time the film unwinding reel 11 rotates to update the transparent film 15 at the end of the infrared distance sensor. When updating the transparent film, the micro air supply pump 10 supplies air to the uniform air pipe 16. A plurality of air holes are arranged on the uniform air pipe 16, so that the sealing strip 17 turns outwards and separates from the surface of the transparent film 15, and at the same time, dust will not enter. After updating, the micro air supply pump 10 stops working, and the sealing strip 17 will reset under its own elastic force and reattach to the surface of the transparent film 15.

[0079] In all the above-mentioned solutions, for the connection between two components, welding, the cooperation connection of bolts and nuts, bolt or screw connection, or other well-known connection methods can be selected according to the actual situation, which will not be elaborated one by one here. For those mentioned above that involve fixed connection, welding is preferably considered. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asphalt pavement flatness detection device, characterized in that: The invention comprises a mobile detection platform (1), wherein a first detection mechanism (2), a second detection mechanism (3) and a third detection mechanism (4) are arranged at the bottom of the mobile detection platform (1), and the first detection mechanism (2), the second detection mechanism (3) and the third detection mechanism (4) are distributed at equal intervals along the lateral direction of the mobile detection platform (1); The first detection mechanism (2), the second detection mechanism (3) and the third detection mechanism (4) are all provided with corresponding detection modules (5), and the detection modules (5) corresponding to the first detection mechanism (2), the second detection mechanism (3) and the third detection mechanism (4) are arranged in parallel along the transverse direction of the mobile detection platform (1), and the lengths of the first detection mechanism (2), the second detection mechanism (3) and the third detection mechanism (4) are arranged in an equidistant manner, wherein the length of the first detection mechanism (2) is the longest, and the detection module (5) corresponding to the first detection mechanism (2) is located at the center of the bottom of the mobile detection platform (1), one end of the second detection mechanism (3) and one end of the third detection mechanism (4) are both rotatably mounted on one end of the first detection mechanism (2), and the second detection mechanism (3) and the third detection mechanism (4) are distributed on both sides of the first detection mechanism (2).

2. The asphalt pavement flatness detection device according to claim 1 is characterized in that: The first detection mechanism (2) comprises a first pulley (201) located at the front end of the bottom of the mobile detection platform (1), and a second pulley (202) arranged at a side of the bottom of the mobile detection platform (1) away from the first pulley (201); The detection module (5) corresponding to the first detection mechanism (2) comprises a first infrared distance measuring sensor (501) arranged at the center position of the bottom of the mobile detection platform (1); Two second pulleys (202) are provided, and the two second pulleys (202) and the first pulley (201) are distributed in a triangular shape at the bottom of the mobile detection platform (1); a connecting bracket (203) is provided between the two second pulleys (202), and one end of the second detection mechanism (3) and the third detection mechanism (4) are respectively sleeved at two end positions of the connecting bracket (203).

3. The asphalt pavement flatness detection device according to claim 2 is characterized in that: The second detection mechanism (3) comprises a first sleeve (301) rotatably mounted on the connecting bracket (203), a first support plate (302) arranged on the circumferential side wall of the first sleeve (301), and a third pulley (303) arranged on an end of the first support plate (302) away from the first sleeve (301); The detection module (5) corresponding to the second detection mechanism (3) comprises a second infrared distance measuring sensor (502) arranged on the first support plate (302).

4. The asphalt pavement flatness detection device according to claim 3 is characterized in that: The third detection mechanism (4) comprises a second sleeve (401) rotatably mounted on the connecting bracket (203) at one end away from the first sleeve (301), a second support plate (402) arranged on the circumferential side wall of the second sleeve (401), and a fourth pulley (403) arranged on one end of the second support plate (402) away from the second sleeve (401); The detection module (5) corresponding to the third detection mechanism (4) comprises a third infrared distance measuring sensor (503) arranged on the second support plate (402).

5. The asphalt pavement flatness detection device according to claim 4 is characterized in that: The distance between the third pulley (303) and the first sleeve (301) is smaller than the distance between the first pulley (201) and the connecting bracket (203), and the distance between the fourth pulley (403) and the second sleeve (401) is smaller than the distance between the third pulley (303) and the first sleeve (301); The lateral projection distance from the first pulley (201) to the third pulley (303) is the same as the lateral projection distance from the third pulley (303) to the fourth pulley (403).

6. The asphalt pavement flatness detection device according to claim 5 is characterized in that: A first limiting column (304) is welded on the mounting frame of the third pulley (303); a first strip groove (305) is formed at one end of the first support plate (302) away from the first sleeve (301); and the first strip groove (305) and the first limiting column (304) are slidably matched; A second limiting column (404) is welded on the mounting frame of the fourth pulley (403), and a second strip groove (405) is formed at one end of the second support plate (402) away from the second sleeve (401), and the second strip groove (405) and the second limiting column (404) are slidably matched.

7. The asphalt pavement flatness detection device according to claim 6 is characterized in that: A first limiting ring (306) is provided at one end of the circumferential side wall of the first limiting column (304) close to the third pulley (303) mounting frame, and a spacing for sliding installation of the first support plate (302) is provided between the first limiting ring (306) and the third pulley (303) mounting frame; A second limiting ring (406) is provided at one end of the circumferential side wall of the second limiting column (404) close to the fourth pulley (403) mounting frame, and a spacing for sliding installation of the second support plate (402) is provided between the second limiting ring (406) and the fourth pulley (403) mounting frame.

8. The asphalt pavement flatness detection device according to claim 7 is characterized in that: The bottom of the mobile detection platform (1) is provided with a first limiting hole (101) and a second limiting hole (102); The first limiting hole (101) is movably plugged into and corresponds to the first limiting column (304), and a first retaining ring (103) is provided at the opening of the first limiting hole (101), and a first anti-slip ring (307) is provided at one end of the first limiting column (304) away from the first limiting ring (306), and the first anti-slip ring (307) and the first retaining ring (103) are anti-slip correspondingly; The second limiting hole (102) is movably plugged into and corresponds to the second limiting column (404), and a second retaining ring (104) is provided at the opening of the second limiting hole (102), and a second anti-slip ring (407) is provided at one end of the second limiting column (404) away from the second limiting ring (406), and the second anti-slip ring (407) and the second retaining ring (104) correspond to each other in anti-slipping.

9. The asphalt pavement flatness detection device according to claim 1, characterized in that: A surveying and mapping computer (6) is arranged on the top of the mobile detection platform (1), and the surveying and mapping computer (6) communicates with the first infrared distance measuring sensor (501), the second infrared distance measuring sensor (502) and the third infrared distance measuring sensor (503) through wireless transmission; A hand-pushing handle (7) is arranged on one side of the top end of the mobile testing platform (1).

10. The asphalt pavement flatness detection device according to claim 4, characterized in that: The detection module (5) further comprises a fixing seat 1 (8) and a fixing seat 2 (9), wherein the fixing seat 1 (8) and the fixing seat 2 (9) are distributed on both sides of the infrared distance measuring sensor, a reeling shaft (11) is mounted on the fixing seat 1 (8), a reeling shaft (13) and a tubular motor (12) for driving the reeling shaft (13) to rotate are mounted on the fixing seat 2 (9), a transparent film (15) is wound around the reeling shaft (11) and the reeling shaft (13), and a photoresistor (14) is mounted on the surface of the infrared distance measuring sensor; An air-distributing pipe (16) and sealing strips (17) distributed on the periphery of the air-distributing pipe (16) are arranged around the outer side of the infrared distance-finding sensor. The air-distributing pipe (16) is externally connected to a micro air supply pump (10) through a pipeline.

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