Road maintenance pavement quality detection device and method

Abstract

The invention relates to a road maintenance pavement quality detection device, and belongs to the technical field of road detection. The device comprises a pushing vehicle, a transmission box is arranged at the top of the pushing vehicle, and a driving assembly in the transmission box is connected with and drives a sweeping roller to rotate to achieve zebra crossing surface sweeping; the swing support is arranged on the transmission case and driven by the driving assembly to enable the camera device to swing so as to simulate observation angles of pedestrians at different positions. The thickness detection assembly is matched with an infrared distance measuring device through a sliding rod I at the bottom of a lifting support, and the zebra crossing thickness is reflected through the height difference; the friction force detection assembly is linked with the lifting support through the transmission assembly, the electric push rod drives the sliding block to move, the tension sensor detects friction force, and the water storage tank can simulate a rainy environment. The device integrates functions of cleaning, visible observation and thickness and friction force detection, realizes cooperative work of all components through mechanical linkage, reduces equipment carrying and operation steps, improves detection efficiency and data accuracy, and is suitable for quality evaluation of various road zebra crossings.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of road detection and relates to a road maintenance pavement quality detection device and method. BACKGROUND

[0002] With the acceleration of urbanization, road traffic safety is increasingly valued, and the quality detection of zebra crossings, as a key sign for pedestrians to cross the street, has become an important part of road maintenance work. In recent years, although road detection technology has developed, there are still many limitations in the special detection means for zebra crossings, a special traffic facility.

[0003] In terms of visibility detection, in addition to manual visual inspection, some fixed-angle camera devices are also used for shooting in the prior art, but these devices cannot simulate the observation angle of pedestrians in different positions and different walking states, and it is difficult to fully reflect the visibility of zebra crossings in actual traffic scenes, resulting in deviations between the detection results and the actual visual effects.

[0004] For thickness detection, traditional manual measurement is not only low in efficiency, but also may affect the representativeness of data due to improper selection of measurement points. Some automatic thickness detection devices can realize continuous measurement, but they cannot take into account the influence of road flatness on thickness measurement at the same time, and additional equipment is needed for road flatness detection, further increasing the detection cost and time.

[0005] In the field of friction force detection, the existing friction coefficient testers are mostly special-purpose devices, and their detection principles and operation modes determine that they can only perform single-point detection in a fixed area, and it is difficult to realize continuous detection of the entire zebra crossing.

[0006] Therefore, we propose a road maintenance pavement quality detection device and method to solve the above problems. SUMMARY

[0007] Therefore, the application provides a road maintenance pavement quality detection device and method to solve the above problems.

[0008] To achieve the above purpose, the application provides the following technical scheme: a road maintenance pavement quality detection device, comprising:

[0009] The pusher vehicle is provided with a transmission box on the top, and a driving assembly is arranged in the transmission box.

[0010] The cleaning roller is rotatably arranged on one side of the pusher vehicle through a bearing and is connected with the driving assembly and driven to rotate by the driving assembly to clean the surface of the zebra crossing.

[0011] The swing support is arranged on the transmission box and connected with the driving assembly, and the top end of the swing support is fixedly provided with the camera device.

[0012] The thickness detection assembly is arranged on the push car and comprises a lifting support which is arranged in the transmission box in a lifting manner, a plurality of sliding rods I are arranged on the bottom of the lifting support in a lifting manner, an infrared distance measuring device is fixedly arranged on the top of the lifting support and corresponds to the sliding rods I, the sliding rods I on the two sides correspond to the road surface, and the infrared distance measuring device reflects the thickness of the zebra crossing by detecting the height difference of the sliding rods I.

[0013] The friction detection assembly is arranged on the push car and connected with the lifting support through the transmission assembly, and the lifting support is lowered synchronously when the lifting support is lifted, and the friction detection assembly comprises a lifting base, a sliding block is arranged in the lifting base, an electric push rod is fixedly arranged on one side of the lifting base, and a tension sensor is connected between the electric push rod and the sliding block. The electric push rod drives the sliding block to move on the zebra crossing, and the tension sensor detects the friction.

[0014] As a further improvement of the above technical solutions:

[0015] The driving assembly comprises:

[0016] The chassis is fixedly arranged in the push car;

[0017] The driving motor is fixedly arranged on the top of the chassis;

[0018] The reciprocating screw rod is rotatably arranged in the transmission box;

[0019] The synchronous pulley and the synchronous transmission belt are arranged, and the cleaning roller and the reciprocating screw rod are in driving connection with the driving motor through the synchronous pulley and the synchronous transmission belt;

[0020] The power storage device is fixedly arranged on the top of the chassis and connected with the driving motor through wires to supply power to the driving motor.

[0021] The swing support comprises:

[0022] The fixed support is fixedly arranged on the top of the transmission box;

[0023] The rotating shaft is fixedly arranged on one side of the fixed support;

[0024] The rotating support is rotatably arranged on the outer wall of the rotating shaft, and the top end of the rotating support is fixedly connected with the camera device;

[0025] The sleeve ring is slidably arranged on the outer wall of the reciprocating screw rod, and the inner sliding block of the sleeve ring is located in the spiral groove of the reciprocating screw rod;

[0026] The connecting piece connects the bottom end of the rotating support and the sleeve ring, and the rotating support is swung around the rotating shaft through the sleeve ring and the connecting piece when the reciprocating screw rod rotates.

[0027] The connecting piece comprises:

[0028] The extension base is fixedly arranged at the bottom of the rotating support;

[0029] The rotating pull rod is rotatably arranged in the extension base;

[0030] The connecting pull rod is slidably arranged in the rotating pull rod;

[0031] The rotating block is rotatably arranged at one side of the sleeve ring, and a clamping buckle is fixedly arranged on the surface of the rotating block;

[0032] The connecting pull rod is buckled in the clamping buckle to form linkage of the rotating support and the sleeve ring.

[0033] The sliding ring is arranged in the rotating pull rod, the top end of the sliding ring is provided with an external thread structure, the rotating pull rod is provided with an internal thread structure, and the bottom of the rotating shaft is provided with a plug hole matched with the connecting pull rod;

[0034] When the external thread structure is threadedly connected with the internal thread structure, the top end of the connecting pull rod is inserted into the plug hole to limit the rotating support.

[0035] Two guide rods I are slidably arranged through the top of the transmission box, and the bottom ends of the guide rods I are fixedly connected with the lifting support;

[0036] A screw rod I is threadedly arranged through the top of the transmission box, the bottom end of the screw rod I is rotatably connected with the top of the lifting support, and the rotating screw rod I can drive the lifting support to ascend and descend along the guide rod I.

[0037] A fixed base is fixedly arranged on the top end outer wall of the sliding rod I, two guide rods II are slidably arranged through the top of the fixed base, and the guide rods II are fixedly arranged in the lifting support;

[0038] A spring is arranged on the outer wall of the sliding rod I, the two ends of the spring are respectively abutted against the bottom of the fixed base and the bottom wall of the lifting support through spring seats, a rolling wheel is fixedly arranged at the bottom of the sliding rod I, and the rolling wheel is pressed against the ground by the pulling force of the spring.

[0039] The transmission assembly comprises:

[0040] A pulley block device is fixedly arranged at one side of the transmission box;

[0041] A traction rope is wound on the pulleys of the pulley block device, one end of the traction rope is fixedly connected with the lifting support, and the other end of the traction rope is connected with the lifting base;

[0042] Two guide rods III are slidably arranged through the top of the pusher, and the bottom ends of the guide rods III are fixedly connected with the lifting base.

[0043] The sliding rod II is arranged through the top of the push car and is fixedly connected with the traction rope away from the lifting support;

[0044] The rectangular recess is internally fixed with a connecting column body, and the sliding rod II is provided with a hanging socket matched with the connecting column body; when the connecting column body is clamped into the hanging socket, the lifting base can be limited to lift along with the sliding block.

[0045] A road maintenance pavement quality detection method adopts the road maintenance pavement quality detection device, and comprises the following steps:

[0046] S1, the push car is pushed to the zebra crossing area and is fixed, the driving assembly is started to rotate the cleaning roller to clean the surface of the zebra crossing;

[0047] S2, the driving assembly drives the swing support to swing, and the camera device swings synchronously to shoot the visibility of the zebra crossing under different visual angles;

[0048] S3, the lifting support is adjusted to descend, so that the rolling wheel of the sliding rod I contacts the ground, and the infrared distance measuring device detects the height difference of the sliding rod I to obtain the thickness of the zebra crossing;

[0049] S4, the lifting support is adjusted to ascend, the lifting base is driven to descend by the transmission assembly, so that the sliding block contacts the surface of the zebra crossing;

[0050] S5, the electric push rod is started to drive the sliding block to move, and the tension sensor detects the friction force;

[0051] S6, the valve of the water storage tank is opened to sprinkle water on the zebra crossing, and S5 is repeated to obtain the friction force data in rainy days.

[0052] The beneficial effects of the present application are:

[0053] 1, the road maintenance pavement quality detection device disclosed in the present application, the combination of the swing support and the reciprocating screw rod adopts a connecting rod transmission structure, the swing support is driven to swing through the reciprocating movement of the sleeve ring, the multi-angle adjustment of the camera device can be realized without additional power, so that the zebra crossing can be observed by the pedestrians in different positions, the energy consumption is reduced, the transmission path is simple and intuitive, and the later maintenance is facilitated, meanwhile, the telescopic cooperation between the rotating pull rod and the connecting pull rod can flexibly adapt to the distance change between the sleeve ring and the rotating support, ensure the stable transmission of the swing movement, and the swing frame can be fixed.

[0054] 2、The road maintenance pavement quality detection device disclosed by the application, the thickness detection assembly and the friction force detection assembly are linked through the pulley set and the traction rope, the lifting action of the lifting support directly controls the reverse movement of the lifting base, the "one lifting and one lowering" synergistic effect is realized, the driving device needs not to be separately arranged for the friction force detection assembly, the action conversion is completed by using the force transmission characteristics of the mechanical structure, not only the space is saved, but also the cooperation precision of each assembly is improved, and the coherence of the detection process is ensured;

[0055] 3、The road maintenance pavement quality detection device disclosed by the application can simulate the friction force between the vehicle and the zebra crossing in rainy days by discharging water from the zebra crossing through the water storage tank, and can perform subsequent construction on the surface of the zebra crossing according to the size of the friction force;

[0056] 4、The road maintenance pavement quality detection device disclosed by the application can automatically remove floating dust and sundries on the surface of the zebra crossing before detection through the synchronous driving of the cleaning roller by the driving motor through the synchronous pulley, avoid the interference of pollutants on the thickness detection and the friction force detection, and ensure that the cleaning action and the detection device running speed are accurately matched through the synchronous transmission structure, thereby reducing the detection error caused by human factors;

[0057] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following specification, in some degree of certainty, and in some degree of certainty, based on the study of the following, or can be taught from the practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0058] In order to make the objects, technical solutions and advantages of the present application clearer, the preferred detailed description of the present application will be made below in combination with the drawings, in which:

[0059] Figure 1 It is a three-dimensional structure schematic view of the road maintenance pavement quality detection device of the present application;

[0060] Figure 2 It is a three-dimensional structure schematic view of the road maintenance pavement quality detection device of the present application from another perspective;

[0061] Figure 3 It is a swing frame and reciprocating screw installation structure schematic view of the road maintenance pavement quality detection device of the present application;

[0062] Figure 4 It is a thickness detection mechanism and friction force detection connection structure schematic view of the road maintenance pavement quality detection device of the present application;

[0063] Figure 5It is a sliding block mounting structure schematic view of a road maintenance pavement quality detection device of the present application;

[0064] Figure 6 It is a rotating block and ball nut connecting structure schematic view of a road maintenance pavement quality detection device of the present application;

[0065] Figure 7 It is a swing frame cross section structure schematic view of a road maintenance pavement quality detection device of the present application;

[0066] Figure 8 It is Figure 7 A enlarged structure schematic view of A part.

[0067] The drawings show: 1, push the car; 2, water storage tank; 3, handle; 4, cleaning roller; 5, transmission box; 6, swing support; 61, fixed support; 62, rotating shaft; 63, rotating support; 64, extension base; 65, connecting pull rod; 66, rotating pull rod; 67, sliding ring; 68, external thread structure; 69, internal thread structure; 7, camera device; 8, guide rod I; 9, screw I; 10, chassis; 11, power storage device; 12, drive motor; 13, reciprocating screw; 14, synchronous pulley; 15, synchronous transmission belt; 16, collar; 17, lifting support; 18, sliding rod I; 19, spring; 20, fixed base; 21, guide rod II; 22, infrared distance measuring device; 23, rolling wheel; 24, guide rod III; 25, sliding rod II; 26, lifting base; 27, electric push rod; 28, sliding block; 29, pulley assembly device; 30, traction rope; 31, tension sensor; 32, rectangular groove; 33, connecting column; 34, hanging bayonet; 35, rotating block; 36, clamping buckle. DETAILED DESCRIPTION

[0068] The present application will be described in more detail by the following specific examples, and those skilled in the art will readily understand other advantages and purposes of the present application from the disclosure of the present application. The present application can also be implemented or applied in other different specific embodiments, and various modifications or changes can be made to the details of the present application based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the features in the following examples and embodiments can be combined with each other without conflict.

[0069] The drawings are only used for illustrative explanation, and the representation is only a schematic diagram, not a physical drawing, and cannot be understood as a limitation on the present application; in order to better illustrate the embodiments of the present application, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted.

[0070] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0071] like Figures 1-8 As shown, a road maintenance pavement quality inspection device includes a push cart 1. The frame of the push cart 1 is welded with steel sections and has an overall rectangular structure. The rollers at the bottom are equipped with brake pads. When it needs to be fixed, the brake pads can be stepped on to stably stop in place. A transmission box 5 is fixed to the top of the push cart 1 by bolts. The body of the transmission box 5 is welded with steel plates and the surface is treated with rust prevention. A plurality of screw holes are reserved on the internal mounting plate to facilitate the fixing of various components of the drive assembly. A cleaning roller 4 is rotatably installed on one side of the push cart 1 through a bearing. The roller body of the cleaning roller 4 is made of metal, and the elastic bristles on the outer wall are made of wear-resistant nylon material. The length of the bristles is set according to the cleaning needs of common road debris to ensure that it can fully contact the ground during rotation. One end of the cleaning roller 4 extends through the bearing to the inside of the transmission box 5 and is connected to the drive assembly. When the drive assembly is running, the cleaning roller 4 rotates accordingly, and the bristles continuously beat and clean the surface of the zebra crossing, removing attached dust, pebbles, fallen leaves and other debris, allowing subsequent detection components to directly contact the surface of the zebra crossing to ensure the accuracy of the detection data.

[0072] The swing bracket 6 is installed on the top of the transmission box 5, and is used to support and drive the camera device 7 to swing. The fixed bracket 61 of the swing bracket 6 is an L-shaped steel plate, which is fixed to the top edge of the transmission box 5 by welding. A rotating shaft 62 is welded to one side of the fixed bracket 61, and one end of the rotating shaft 62 is fixed by welding to ensure its stability. The rotating bracket 63 is a long metal rod, which is sleeved on the outer wall of the rotating shaft 62 and connected by a bearing, so that the rotating bracket 63 can flexibly rotate around the rotating shaft 62. The camera device 7 is fixed to the top of the rotating bracket 63 by bolts, and its lens is equipped with a dust cover to prevent it from being contaminated by dust during the detection process. The angle of the lens can be preliminarily calibrated by fine-tuning the bolts to ensure that the initial shooting direction is accurately aligned with the zebra crossing.

[0073] The chassis 10 of the driving assembly is welded by a plurality of angle steels to form a stable support platform and is fixed on the cross beam inside the pusher 1 by bolts. The driving motor 12 fixed on the top of the chassis 10 is provided with a protective cover outside, and the protective cover is provided with heat dissipation holes to prevent overheating of the motor during operation. The reciprocating screw rod 13 in the transmission box 5 is fixed on the inner wall of the transmission box 5 through bearing seats at both ends to ensure that it does not shake during rotation. The extension end of the cleaning roller 4, one end of the reciprocating screw rod 13 and the output shaft of the driving motor 12 are all fixedly provided with synchronous pulleys 14, and the synchronous transmission belt 15 is made of rubber and has a toothed structure inside to precisely engage with the toothed groove on the synchronous pulley 14 to ensure that it does not slip during transmission. The power storage device 11 on the top of the chassis 10 is provided with a protective shell outside, and the protective shell is provided with a charging interface and an electric quantity indicating lamp to facilitate the operator to check the electric quantity and charge in time. When the driving motor 12 starts, power is transmitted to the cleaning roller 4 and the reciprocating screw rod 13 through the synchronous pulley 14 and the synchronous transmission belt 15, so that the two simultaneously operate to realize the dual functions of cleaning and providing swinging power.

[0074] The sleeve ring 16 on the outer wall of the reciprocating screw rod 13 is a cylindrical structure, and the sliding block on the inner wall closely matches the spiral groove of the reciprocating screw rod 13. When the reciprocating screw rod 13 rotates, the sliding block slides in the spiral groove to drive the sleeve ring 16 to make axial reciprocating motion along the reciprocating screw rod 13. Among the connecting pieces at the bottom end of the rotating support 63, the extension base 64 is a U-shaped structure fixed on the bottom of the rotating support 63 by welding, and the pin shaft holes are opened on the ear plates on both sides, and one end of the rotating pull rod 66 is installed in the pin shaft hole through the pin shaft to make the rotating pull rod 66 freely rotate around the pin shaft. The rotating pull rod 66 is a hollow tubular structure, and the connecting pull rod 65 is arranged therein, and a proper gap is left between the two to allow the connecting pull rod 65 to smoothly stretch and contract. The rotating block 35 on one side of the sleeve ring 16 is installed on the ear plate of the sleeve ring 16 through the pin shaft and can rotate flexibly. The clamping buckle 36 on one side of the rotating block 35 is hook-shaped, and the thimble at the end of the connecting pull rod 65 is matched with the clamping buckle 36 to realize detachable connection, which is convenient for later maintenance and replacement of parts.

[0075] The sliding ring sleeve 67 in the rotating pull rod 66 is fixedly connected with the connecting pull rod 65, when the sliding ring sleeve 67 is rotated, the external thread structure 68 cooperates with the internal thread structure 69 on the inner wall of the rotating pull rod 66, and the connecting pull rod 65 is pushed to move along the axial direction. When the top end of the connecting pull rod 65 is inserted into the insertion hole at the bottom of the rotating shaft 62, the rotating support 63 is fixed and cannot swing, which is suitable for scenes that need to fix the angle of the camera 7 for specific shooting; when the connecting pull rod 65 is separated from the insertion hole, the reciprocating motion of the sleeve ring 16 is transmitted to the rotating support 63 through the connecting pull rod 65 and the rotating pull rod 66, so that the rotating support 63 swings around the rotating shaft 62, and the camera 7 changes the shooting angle, simulates the visual angle of pedestrians at different positions observing the zebra crossing, such as pedestrians near the intersection, pedestrians opposite the road, etc., and comprehensively records the clarity and visibility of the zebra crossing under different visual angles.

[0076] The thickness detection assembly includes a plurality of sliding rods I 18 which are installed on the bottom of the lifting support 17 in a lifting manner, the plurality of sliding rods I 18 are uniformly distributed along the width direction of the pushing trolley 1, the middle sliding rod I 18 corresponds to the width of the zebra crossing, and the two side sliding rods I 18 correspond to the road surface on both sides of the zebra crossing. The top outer wall of the sliding rod I 18 is welded with a fixed base 20, two guide rods II 21 are slidingly installed through the top of the fixed base 20, and the top ends of the guide rods II 21 are welded on the top wall of the lifting support 17 to provide guidance for the lifting of the sliding rod I 18. The outer wall of the sliding rod I 18 is sleeved with a spring 19, and the two ends of the spring 19 are respectively in contact with the bottom of the fixed base 20 and the bottom wall of the lifting support 17 through spring seats. Under the action of the pulling force of the spring 19, the sliding rod I 18 always has a downward movement tendency. The bottom of the sliding rod I 18 is rotatably installed with a rolling wheel 23, which can roll when in contact with the ground to reduce friction. The top wall of the lifting support 17 is fixedly installed with an infrared distance measuring device 22 corresponding to the sliding rod I 18 through bolts, and the detection end of the infrared distance measuring device 22 faces the fixed base 20 downward, which is used to detect the distance between the two. When the device moves, the middle rolling wheel 23 is located on the zebra crossing, and the two side rolling wheels 23 are located on the road surface. Because there is a height difference between the zebra crossing and the road surface, the lifting heights of the plurality of sliding rods I 18 are different, and the distances between the fixed base 20 and the infrared distance measuring device 22 are also different. When the sliding rod I 18 is lifted, the distance between the top end and the infrared distance measuring device 22 changes, and the infrared distance measuring device 22 transmits the distance signal to the data processing module to calculate the height difference of the sliding rod I 18, and then the thickness of the zebra crossing is obtained. Because the middle sliding rod I 18 corresponds to the zebra crossing, the height difference between the height of the zebra crossing and the height of the road surface on both sides is the thickness of the zebra crossing, and the flatness of the road surface can also be detected.

[0077] The friction detection assembly is installed on the pusher 1, and is connected with the lifting support 17 through a transmission assembly. When the lifting support 17 moves upward, the friction detection assembly moves downward, and vice versa. The transmission assembly comprises a pulley block device 29 fixed on one side of the transmission box 5 through bolts. High-strength nylon ropes are wound around two pulleys at the bottom of the pulley block device 29 to reduce friction when the ropes move. One end of the rope is fixed to one side of the lifting support 17, and the other end is connected with the lifting base 26. Two guide rods III 24 are slidably installed on the top of the pusher 1. The two guide rods III 24 are symmetrically distributed, and the bottoms of the two guide rods III 24 are welded and fixed to the top of the lifting base 26 to provide guidance for the lifting of the lifting base 26. A sliding rod II 25 is also slidably installed on the top of the pusher 1. The bottom end of the sliding rod II 25 extends into the lifting base 26. The end of the traction rope 30 away from the lifting support 17 is fixed to the top end of the sliding rod II 25. When the lifting support 17 rises, the traction rope 30 pulls the sliding rod II 25 to rise. The sliding rod II 25 drives the sliding block 28 to move upward through the hanging hook 34 and the connecting column 33, so as to drive the lifting base 26 to rise. When the lifting support 17 descends, the sliding block 28 descends under the action of its own gravity, realizing the linkage of the two.

[0078] The lifting base 26 is hollow inside, and the inside of the lifting base 26 is provided with a sliding block 28. The bottom of the sliding block 28 is provided with a rubber friction plate. The material of the rubber friction plate is consistent with that of the tire rubber, and the rubber friction plate can be replaced to simulate the friction between the tire and the zebra crossing. An electric push rod 27 is fixed on one side of the lifting base 26 through welding. The output end of the electric push rod 27 faces the sliding block 28, and a tension sensor 31 is connected between the output end of the electric push rod 27 and the sliding block 28. One end of the tension sensor 31 is connected with the output end of the electric push rod 27 through a hook, and the other end is connected with the sliding block 28 through a guide rail block, so that the sliding block 28 can move up and down relative to the tension sensor 31. A rectangular groove 32 is formed in the top of the sliding block 28, and a connecting column 33 is welded and fixed in the rectangular groove 32. A hanging hook 34 is formed in one side of the sliding rod II 25 for cooperation with the connecting column 33. When the lifting base 26 descends to the position where the sliding block 28 contacts the ground, the connecting column 33 moves upward in the hanging hook 34. At this time, the sliding block 28 can translate. When the sliding rod II 25 moves upward, the connecting column 33 is at the lower end of the hanging hook 34, and continues to move upward to limit the sliding block 28 from contacting the lifting base 26. When the electric push rod 27 is started, the output end of the electric push rod 27 drives the sliding block 28 to move on the zebra crossing. The tension sensor 31 detects the force required to pull the sliding block 28 in real time, and reflects the friction of the zebra crossing. At the same time, the height of one side of the lifting base 26 is higher than that of the sliding block 28. When the lifting base 26 contacts the zebra crossing, the sliding block 28 can still move downward, so that the sliding block 28 does not contact the lifting base 26.

[0079] The lifting support 17 of the thickness detection assembly is a frame structure welded by metal rods and located in the transmission box 5. Two guide rods I 8 on the top of the transmission box 5 are arranged in parallel, the top end is provided with a limiting block, and the bottom end is welded with the lifting support 17 to prevent the lifting support 17 from falling out when it is lowered. The top end of the screw rod I 9 is provided with a hand wheel, the outer wall of the hand wheel is sleeved with a rubber sleeve, which is convenient for the operator to rotate. When the hand wheel is rotated, the screw rod I 9 is rotated, and under the guidance of the guide rod I 8, the lifting support 17 stably rises or falls, adjusting the distance between the sliding rod I 18 and the ground.

[0080] The water storage tank 2 on the top of the pusher 1 is made of plastic material, which is light in weight and corrosion-resistant. The water inlet on the top is provided with a cover to prevent foreign matter from entering. The pipeline on one side of the water storage tank 2 is a hard plastic pipe, and the end is provided with a spray head to make the water flow uniformly sprayed on the zebra crossing. The valve on the pipeline is a ball valve, which is easy to operate and can control the size and on-off of the water flow. When it is necessary to simulate the rainy weather environment, the valve is opened, the water flow is sprayed on the zebra crossing through the spray head, the surface of the zebra crossing is wetted, and then the friction detection is carried out to obtain the friction data under the rainy weather condition, which is compared with the data under the dry condition to evaluate the anti-skid performance of the zebra crossing under different weather conditions. The holding handle 3 on one side of the water storage tank 2 is welded and fixed with the frame of the pusher 1, the height is suitable for the operator to push, and the anti-slip rubber sleeve on the outer wall increases the friction to prevent the hand from slipping when pushing.

[0081] Before detection, the operator first checks the state of each part of the device, confirms that the power storage device 11 has sufficient power, the lens of the camera device 7 is clean, the bristles of the cleaning roller 4 are not excessively worn, and the rubber friction sheet at the bottom of the sliding block 28 is intact. Then hold the holding handle 3, push the pusher 1 to the zebra crossing area to be detected, adjust the position of the device so that the cleaning roller 4, the thickness detection assembly and the friction detection assembly are all aligned with the zebra crossing range, step on the roller brake pad at the bottom of the pusher 1 to ensure that the device is stable and fixed.

[0082] After starting the device, the driving motor 12 starts to operate, and the rotating power of the output shaft is transmitted to the cleaning roller 4 and the reciprocating screw rod 13 through the synchronous pulley 14 and the synchronous transmission belt 15. The cleaning roller 4 rotates immediately, the elastic bristles on the outer wall contact and rub the surface of the zebra crossing, and the dust, sand, fallen leaves and other impurities on the surface are cleaned to the roadside, so that these impurities do not affect the direct contact between the subsequent detection assembly and the zebra crossing.

[0083] While sweeping, the reciprocating screw rod 13 rotates synchronously, and the helical groove on the outer wall of the reciprocating screw rod 13 drives the sleeve ring 16 to move reciprocally along the axial direction. The sleeve ring 16 pulls the rotating support 63 through the connecting pull rod 65 and the rotating pull rod 66, so that the rotating support 63 swings reciprocally around the rotating shaft 62, and the camera 7 at the top end changes the shooting angle accordingly. The camera 7 swings gradually from the initial alignment with the center of the zebra crossing to the two sides, simulates the perspective of pedestrians observing the zebra crossing from the two ends and the middle of the road, continuously shoots the zebra crossing images at different angles, and records the visibility and the cracking of the edge of the zebra crossing at different observation directions, such as whether there is a local discoloration or a perspective blind area caused by a fracture.

[0084] After the sweeping is completed, the operator rotates the screw rod I 9, and under the limiting action of the guide rod I 8, the lifting support 17 drives the three sliding rods I 18 at the bottom to move downward until the rolling wheels 23 at the bottom of the sliding rods I 18 are in contact with the ground. At this time, the spring 19 is in a stretched state, and a downward pulling force is generated on the fixed base 20, so that the rolling wheels 23 are tightly attached to the ground. Due to the height difference between the zebra crossing and the surrounding road surface, the sliding rod I 18 corresponding to the zebra crossing in the middle and the sliding rod I 18 corresponding to the road surface on the two sides form a lifting difference, the fixed base 20 lifts with the sliding rod I 18, and the infrared distance measuring device 22 detects the distance between the fixed base 20 in real time. By comparing the detection data of the plurality of infrared distance measuring devices 22, the height difference between the middle sliding rod I 18 and the two side sliding rods I 18 is calculated, and the difference value is the thickness of the zebra crossing. The data is transmitted to the recording system of the device in real time.

[0085] After the thickness detection is completed, the screw rod I 9 is reversely rotated, the lifting support 17 moves upward, and the friction force detection assembly is driven to work through the transmission assembly. When the lifting support 17 rises, the traction rope 30 pulls the sliding rod II 25 under the guidance of the pulley set device 29, so that the sliding rod II 25 drives the lifting base 26 to move downward along the guide rod III 24 until the rubber friction plate at the bottom of the sliding block 28 is in contact with the surface of the zebra crossing. At this time, the connecting column 33 at the top of the sliding block 28 is separated from the hanging buckle 34 on one side of the sliding rod II 25, so that the sliding block 28 and the lifting base 26 are unlocked.

[0086] Subsequently, the electric push rod 27 is started, the output end thereof is extended and pushes the sliding block 28 to move on the zebra crossing along the sliding rail in the lifting base 26 through the pull force sensor 31. The sliding block 28 and the surface of the zebra crossing rub to generate a resistance, the resistance is detected in real time through the pull force sensor 31, the detection value of the pull force sensor 31 is used to calculate the friction force of the surface of the zebra crossing at present, and the sliding block 28 moves back and forth for 2-3 times in the detection process, and the average value is taken as the friction force data of the region.

[0087] If the friction in rainy environment needs to be detected, the operator opens the valve on one side of the pipeline of the water storage tank 2, and the water in the water storage tank is evenly sprayed on the zebra crossing through the pipeline from the spray head, so that a layer of water film is formed on the surface of the zebra crossing. After the water film is evenly distributed, the above-mentioned friction detection steps are repeated, the electric push rod 27 pushes the sliding block 28 to move on the wet zebra crossing surface, and the tension sensor 31 records the friction data under the rainy condition, which is compared with the data under the dry condition to evaluate the attenuation of the anti-skid performance of the zebra crossing.

[0088] After all the detection items are completed, the operator turns off the power supply of the driving motor 12 and each component, rotates the screw rod I 9 to make the lifting support 17 rise and reset, and the sliding rod I 18 is separated from the ground; at the same time, the lifting support 17 rises, the lifting base 26 descends and resets under the action of gravity, and the sliding block 28 is separated from the surface of the zebra crossing. Finally, the roller brake pad is loosened, the push car 1 is pushed to the next detection point, or is returned to the storage position, and the zebra crossing detection process is completed.

[0089] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of the claims of the present application.

Claims

1. A road maintenance pavement quality detection device, characterized in that: include: A push cart (1), wherein a transmission box (5) is fixedly provided on the top of the push cart (1), and a drive assembly is provided in the transmission box (5); A cleaning roller (4) is rotatably mounted on one side of the push vehicle (1) via a bearing, is connected to a drive assembly, and is driven to rotate by the drive assembly to clean the surface of the zebra crossing; A swing bracket (6) is provided on the transmission box (5) and connected to the driving assembly, and a camera device (7) is fixedly provided on the top of the swing bracket. The driving assembly drives the swing bracket (6) to drive the camera device (7) to swing to simulate the viewing angle of pedestrians at different positions; A thickness detection assembly is provided on the push vehicle (1), comprising a lifting bracket (17) which is liftable and arranged in a transmission box (5), wherein a plurality of sliding rods I (18) are liftable at the bottom of the lifting bracket (17), and an infrared distance measuring device (22) corresponding to the sliding rods I (18) is fixedly provided at the top, wherein the middle sliding rod I (18) corresponds to the zebra crossing, and the sliding rods I (18) on both sides correspond to the road surface, and the infrared distance measuring device (22) reflects the thickness of the zebra crossing by detecting the height difference of the sliding rods I (18); The friction force detection component is arranged on the push vehicle (1) and is connected to the lifting bracket (17) through the transmission component. When the lifting bracket (17) rises, the friction force detection component is synchronously lowered. The friction force detection component comprises a lifting base (26). A sliding block (28) is provided in the lifting base (26). An electric push rod (27) is fixedly provided on one side. A tension sensor (31) is connected between the electric push rod (27) and the sliding block (28). The electric push rod (27) drives the sliding block (28) to move on the zebra crossing. The tension sensor (31) detects the friction force.

2. The road maintenance pavement quality detection device according to claim 1, characterized in that: The drive assembly includes: A base frame (10) is fixedly arranged in the push vehicle (1); a driving motor (12) is fixedly arranged on the top of the base frame (10); a reciprocating screw rod (13) is rotatably arranged in the transmission box (5); a synchronous pulley (14) and a synchronous transmission belt (15), wherein the cleaning roller (4) and the reciprocating screw rod (13) are both connected to the driving motor (12) through the synchronous pulley (14) and the synchronous transmission belt (15); and a power storage device (11) is fixedly arranged on the top of the base frame (10) and connected to the driving motor (12) through a wire to supply power to the driving motor (12).

3. The road maintenance pavement quality detection device according to claim 2, characterized in that: The swing bracket (6) comprises: A fixed bracket (61) is fixedly arranged on the top of the transmission box (5); a rotating shaft (62) is fixedly arranged on one side of the fixed bracket (61); a rotating bracket (63) is rotatably sleeved on the outer wall of the rotating shaft (62), and the top end is fixedly connected to the camera device (7); a collar (16) is slidably sleeved on the outer wall of the reciprocating screw (13), and the inner slider thereof is located in the spiral groove of the reciprocating screw (13); a connecting piece connects the bottom end of the rotating bracket (63) and the collar (16), and when the reciprocating screw (13) rotates, the rotating bracket (63) is driven to swing around the rotating shaft (62) through the collar (16) and the connecting piece.

4. The road maintenance pavement quality detection device according to claim 3, characterized in that: The connecting piece includes: An extension base (64) is fixedly arranged at the bottom of the rotating bracket (63); a rotating pull rod (66) is rotatably arranged in the extension base (64); a connecting pull rod (65) is slidably arranged in the rotating pull rod (66); a rotating block (35) is rotatably arranged on one side of the ring (16), and a snap-fit ​​buckle (36) is fixedly provided on the surface of the rotating block (35); the connecting pull rod (65) is snap-fitted in the snap-fit ​​buckle (36) to form a linkage between the rotating bracket (63) and the ring (16).

5. The road maintenance pavement quality detection device according to claim 4, characterized in that: A sliding ring sleeve (67) is provided inside the rotating pull rod (66), an external thread structure (68) is provided at the top end of the sliding ring sleeve (67), an internal thread structure (69) is provided inside the rotating pull rod (66), and a socket adapted to the connecting pull rod (65) is provided at the bottom end of the rotating shaft (62); when the external thread structure (68) and the internal thread structure (69) are threadedly connected, the top end of the connecting pull rod (65) is inserted into the socket to limit the rotating bracket (63).

6. The road maintenance pavement quality detection device according to claim 1, characterized in that: Two guide rods I (8) are provided on the top of the transmission box (5) for sliding, and the bottom ends of the guide rods I (8) are fixedly connected to the lifting bracket (17); a screw rod I (9) is provided on the top of the transmission box (5) for threading, and the bottom ends of the screw rods I (9) are rotatably connected to the top of the lifting bracket (17), and the lifting bracket (17) can be driven to rise and fall along the guide rods I (8) by rotating the screw rods I (9).

7. The road maintenance pavement quality detection device according to claim 6, characterized in that: The top outer wall of the sliding rod I (18) is fixedly sleeved with a fixed base (20), and the top of the fixed base (20) is slidably provided with two guide rods II (21), and the guide rods II (21) are fixedly arranged in the lifting bracket (17); the outer wall of the sliding rod I (18) is sleeved with a spring (19), and the two ends of the spring (19) are respectively in contact with the bottom of the fixed base (20) and the bottom wall of the lifting bracket (17) through the spring seat, and a rolling wheel (23) is fixedly provided at the bottom of the sliding rod I (18), and the tension of the spring (19) causes the rolling wheel (23) to press against the ground.

8. The road maintenance pavement quality detection device according to claim 1, characterized in that: The transmission assembly comprises: A pulley assembly device (29) is fixedly provided on one side of the transmission box (5); a traction rope (30) is wound around the pulley of the pulley assembly device (29), one end of which is fixedly connected to the lifting bracket (17) and the other end of which is connected to the lifting base (26); two guide rods III (24) are slidingly provided on the top of the push vehicle (1), the bottom ends of the guide rods III (24) are fixedly connected to the lifting base (26), and the lifting base (26) is lifted and lowered along the guide rods III (24).

9. The road maintenance pavement quality detection device according to claim 8, characterized in that: A sliding rod II (25) is provided on the top of the push vehicle (1) so as to slide therethrough, and one end of the traction rope (30) away from the lifting bracket (17) is fixedly connected to the sliding rod II (25); A rectangular groove (32) is provided on the top of the sliding block (28), a connecting column (33) is fixedly provided in the rectangular groove (32), and a hanging bayonet (34) is provided on one side of the sliding rod II (25) to cooperate with the connecting column (33). When the connecting column (33) is engaged with the hanging bayonet (34), the lifting base (26) can be restricted from rising and falling along with the sliding block (28).

10. A road maintenance pavement quality detection method, characterized in that: The road maintenance pavement quality detection device according to any one of claims 1 to 9 comprises the following steps: S1, pushing the pusher (1) to the zebra crossing area and fixing it, starting the driving assembly to rotate the cleaning roller (4) to clean the zebra crossing surface; S2, the driving assembly drives the swing bracket (6) to swing, and the camera device (7) swings synchronously to capture the visibility of the zebra crossing at different viewing angles; S3, adjusting the lifting bracket (17) to descend so that the rolling wheel (23) of the sliding rod I (18) touches the ground, and the infrared distance measuring device (22) detects the height difference of the sliding rod I (18) to obtain the thickness of the zebra crossing; S4, adjusting the lifting bracket (17) to rise, driving the lifting base (26) to descend through the transmission assembly, so that the sliding block (28) contacts the surface of the zebra crossing; S5, starting the electric push rod (27) to drive the sliding block (28) to move, and the tension sensor (31) detects the friction force; S6. Open the valve of the water tank (2) to spray water on the zebra crossing, and repeat S5 to obtain friction data on rainy days.

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