Road surface flatness measuring instrument and measuring method

Abstract

The invention discloses a road surface flatness measuring instrument and a measuring method. The road surface flatness measuring instrument comprises a main frame, and a moving assembly, a cleaning assembly, a measuring assembly and a marking assembly which are mounted on the main frame, the main frame comprises a connecting frame, a main base and a main top seat; the moving assembly comprises a first moving mechanism and a second moving mechanism, the first moving mechanism comprises a first moving shaft, and the first moving shaft is rotationally connected to the main machine base; the cleaning assembly comprises a cleaning driving shaft, a first cleaning mechanism and a second cleaning mechanism; the cleaning driving shaft is rotationally connected to the main machine base; the first cleaning mechanism and the second cleaning mechanism are in transmission connection with the cleaning driving shaft. The cleaning driving shaft is in transmission connection with the first moving shaft; the measuring assembly is used for acquiring transverse and longitudinal elevation change data of the pavement; the marking assembly is used for marking the road surface. According to the invention, the problem of detection data deviation caused by stones and particles on the road when the flatness of the road is measured is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of road detection, and in particular to a road surface flatness measuring instrument and a measuring method. Background Art

[0002] With the rapid development of the economy, the overall road construction is constantly advancing. The roads in cities, industrial parks and even rural areas are paved more completely. After the roads are paved, the flatness, compression resistance, and durability of the roads are particularly important. In particular, the flatness of the road is very important for the comfort and safety of vehicle driving, so it is necessary to accurately measure the flatness of the road in order to improve the quality of road paving.

[0003] A detection device for measuring the flatness of a short-distance road surface is disclosed in the patent with patent number CN221877653U, which relates to the technical field of measuring devices. The utility model includes two rectangular support plates, and a translation mechanism and a clamping mechanism are arranged on the two rectangular support plates; a trapezoidal slide is provided on the side of the two rectangular support plates close to each other, and a rectangular support frame is slidably connected on the inner wall of the two trapezoidal slides, and a laser flatness detector is arranged on the top of the rectangular support frame, and the translation mechanism includes a translation assembly and a limit assembly, and the translation assembly includes a rack fixedly connected to the bottom of the rectangular support frame. By setting a translation mechanism, the utility model solves the problem that the laser flatness detector is not easy to move, and when detecting short-distance roads at different locations, it takes more time to carry and adjust the equipment, thereby prolonging the measurement time of a single detection point and reducing the overall detection efficiency.

[0004] However, the above-mentioned detection equipment for measuring the flatness of a short-distance road surface has the following defects when in use: after the road is paved, the flatness of the road needs to be measured, but there will be some stones, granular impurities, etc. on the road. If no treatment is done, the laser flatness detector will cause false alarms in the detection data after passing through the area. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a road surface smoothness measuring instrument and a measuring method, which solves the problem that stones and particles on the road may cause detection data deviation when measuring the road smoothness.

[0006] A first aspect of the present invention provides a road surface flatness measuring instrument, comprising:

[0007] It includes a main frame, and a moving component, a cleaning component, a measuring component and a marking component installed on the main frame;

[0008] The main frame includes a connecting frame, a main frame base and a main frame top seat, wherein the main frame base and the main frame top seat are respectively arranged at the bottom and the top of the connecting frame; the main frame has a frame head and a frame tail;

[0009] The moving assembly includes a first moving mechanism and a second moving mechanism, wherein the first moving mechanism is arranged at the head of the frame, and the second moving mechanism is arranged at the tail of the frame; the first moving mechanism includes a first moving shaft, a first moving wheel and a second moving wheel, wherein the first moving shaft is rotatably connected to the host base; the first moving wheel and the second moving wheel are respectively arranged at opposite ends of the first moving shaft;

[0010] The cleaning assembly is arranged near the head of the frame, and the cleaning assembly comprises a cleaning drive shaft, a first cleaning mechanism and a second cleaning mechanism; the cleaning drive shaft is rotatably connected to the main frame base; the first cleaning mechanism and the second cleaning mechanism are respectively connected to the cleaning drive shaft in a transmission manner, and the first cleaning mechanism and the second cleaning mechanism are used to clean the road surface; the cleaning drive shaft is connected to the first movable shaft in a transmission manner; the cleaning drive shaft is driven to rotate by the first movable shaft, thereby providing power to enable the first cleaning mechanism and the second cleaning mechanism to clean the road surface;

[0011] The measuring component is used to obtain the lateral and longitudinal elevation change data of the road surface;

[0012] The marking assembly is used for marking a road surface.

[0013] In the first aspect of the present invention, as a preferred embodiment, a dust cover is provided on the main engine base, a first accommodating cavity is formed between the dust cover and the main engine base, and the cleaning drive shaft is arranged in the first accommodating cavity; a linkage groove and a cleaning through hole are provided at the bottom of the first accommodating cavity;

[0014] A first synchronous wheel, a second synchronous wheel and a first synchronous belt are arranged between the first moving shaft and the cleaning drive shaft; the first synchronous wheel is connected to the first moving shaft, the second synchronous wheel is connected to the cleaning drive shaft, and the synchronous belt passes through the linkage slot and is connected to the first synchronous wheel and the second synchronous wheel respectively;

[0015] The first cleaning mechanism comprises a cleaning brush head, a cleaning brush seat and a cleaning brush shaft; the cleaning brush seat is fixed to the main engine base, a cleaning brush bearing is fixed in the cleaning brush seat, and the cleaning brush bearing is coaxially arranged with the cleaning brush through hole; a first bevel gear is arranged at one end of the cleaning brush shaft, and the other end passes through the cleaning brush through hole in sequence and is connected with the cleaning brush bearing and the cleaning brush head; bristles are arranged at the bottom of the cleaning brush head;

[0016] A second bevel gear is arranged on the cleaning drive shaft, and the second bevel gear is meshed with the first bevel gear.

[0017] In the first aspect of the present invention, as a preferred embodiment, a first shock-absorbing and damping seat is provided at the connection between the first movable shaft and the main engine base, the first shock-absorbing and damping seat has a connecting end and a supporting end, and the connecting end and the supporting end of the first shock-absorbing and damping seat are connected by a damping connection; the connecting end of the first shock-absorbing and damping seat is connected to the end of the first movable shaft through a bearing seat, and the supporting end of the first shock-absorbing and damping seat is fixedly connected to the main engine base;

[0018] A second shock-absorbing and damping seat is provided at the connection between the cleaning drive shaft and the main engine base, and the second shock-absorbing and damping seat has a connecting end and a supporting end, and the connecting end and the supporting end of the second shock-absorbing and damping seat are connected through a damping connection; the connecting end of the second shock-absorbing and damping seat is connected to the end of the cleaning drive shaft through a bearing seat, and the supporting end of the second shock-absorbing and damping seat is fixedly connected to the main engine base;

[0019] An elastic member is provided at the connection between the end of the cleaning brush shaft and the cleaning brush head, and the elastic member provides an elastic force to drive the cleaning brush head close to the ground.

[0020] In the first aspect of the present invention, as a preferred embodiment, the cleaning drive shaft is sequentially formed with a first sub-shaft, a linkage sub-shaft and a second sub-shaft along the axial direction; the first sub-shaft is transmission-connected with the first cleaning mechanism, the linkage sub-shaft is linked with the first moving shaft, and the second sub-shaft is connected with the second cleaning mechanism;

[0021] One end of the first split shaft is connected to the main engine base through a second shock-absorbing and damping seat, and the other end is connected to the linkage split shaft through a first electromagnetic coupling, and the first electromagnetic coupling is used to control the on and off of the torque transmission between the first split shaft and the linkage split shaft; one end of the second split shaft is connected to the main engine base through a second shock-absorbing and damping seat, and the other end is connected to the linkage split shaft through a second electromagnetic coupling, and the second electromagnetic coupling is used to control the on and off of the torque transmission between the second split shaft and the linkage split shaft.

[0022] In the first aspect of the present invention, as a preferred embodiment, the second moving mechanism includes a second moving shaft, a third moving wheel and a fourth moving wheel, the second moving shaft is rotatably connected to the host base, a third shock-absorbing damping seat is arranged between the second moving shaft and the host base, and the third moving wheel and the fourth moving wheel are respectively arranged at opposite ends of the second moving shaft;

[0023] The second moving mechanism also includes a moving driving member, a moving active wheel, a moving driven wheel and a moving synchronous belt; the moving active wheel is arranged on the second moving shaft, the moving driven wheel is fixed to the first moving shaft, and the moving active wheel and the moving driven wheel are connected by the moving synchronous belt; the moving driving member is fixed to the third shock-absorbing and damping seat through a mounting seat, and the moving driving member has an output end, and the output end is connected to the moving active wheel; the moving driving wheel and the moving driven wheel are driven to rotate by providing power through the moving driving member, so that the main frame moves on the road surface.

[0024] In the first aspect of the present invention, as a preferred embodiment, the main engine top seat is provided with an upper measuring opening, and the upper measuring opening is arranged along the width direction of the main engine top seat; a suspension is arranged above the upper measuring opening; the main engine base is provided with a lower measuring opening, and the lower measuring opening is arranged below the gravity direction of the upper measuring opening, so that a measuring channel is formed between the upper measuring opening and the lower measuring opening; the connecting frame includes a first support plate and a second support plate, and the first support plate and the second support plate are respectively arranged at both ends of the measuring channel; an upper limit plate and a lower limit plate are arranged between the first support plate and the second support plate, and a plurality of first positioning holes are linearly arrayed on the upper limit plate, and a plurality of second positioning holes are correspondingly arranged on the lower limit plate;

[0025] The measuring assembly comprises a plurality of measuring units, and the measuring units are used for transverse and longitudinal elevation change data of a road surface, and the plurality of measuring units are linearly arranged in the measuring channel.

[0026] In the first aspect of the present invention, as a preferred embodiment, the measuring unit includes a laser sensor and a lifting mechanism, the laser sensor is fixed to the bottom wall of the suspension; the lifting mechanism includes a sliding rod, the sliding rod is penetrated through the first positioning hole and the second positioning hole, the top end of the sliding rod extends to the upper measuring opening, and the bottom end of the sliding rod extends to the lower measuring opening; the top end of the sliding rod is fixedly connected to a sensing seat, and the sensing seat is arranged opposite to the laser sensor; the bottom end of the sliding rod is fixedly connected to a measuring wheel seat, and a measuring roller is rollingly connected in the measuring wheel seat;

[0027] A counterweight sleeve is fixedly connected to the lower part of the slide bar, and the bottom of the counterweight sleeve is connected to the lower measuring port through a ball slider; the top of the counterweight sleeve is inserted into the second positioning hole; a support spring is sleeved on the upper part of the slide bar, one end of the support spring abuts against the upper limit plate, and the other end abuts against the top surface of the counterweight sleeve; the support spring provides an elastic force to drive the lifting mechanism to slide downward;

[0028] The main frame also includes a main frame top cover, which covers the top of the main frame top seat; a second accommodating cavity is formed between the main frame top cover and the main frame top seat; the suspension is arranged in the second accommodating cavity; a counterweight is fixed in the second accommodating cavity.

[0029] In the first aspect of the present invention, as a preferred embodiment, a marking opening is provided on the mainframe base, the marking opening is provided on one side of the lower measuring opening, and a fixing frame is provided above the marking opening;

[0030] The marking component includes a material box, a feed pipe, a pump body and a feeding pipe; the pump body is fixed to the main body base, and the feeding pipe is fixed to the fixed frame; the pump body has an input port and an output port, the pump body input port is connected to the material box through the feed pipe, and the pump body output port is connected to the feeding pipe through the feeding pipe; there are a plurality of discharge mechanisms in a linear array on the feeding pipe; the number and position of the discharge mechanisms are respectively arranged corresponding to the plurality of measuring units.

[0031] In the first aspect of the present invention, as a preferred embodiment, the discharging mechanism includes a discharging pipe, one end of which is connected to the feeding pipe, and the other end extends to the bottom of the main engine base through the marking port, the end of the discharging end is connected to a marking head, and the discharging pipe is connected to an electromagnetic control valve.

[0032] A second aspect of the present invention provides a method for measuring road surface flatness, comprising the following steps:

[0033] Providing a road surface flatness measuring instrument as described in any one of the first aspects of the present invention;

[0034] Acquire a detection task, the detection task including information of a road section to be detected and information of a flatness index, construct a basic model of the road section to be detected based on the information of the road section to be detected, the basic model of the road section to be detected having information of a detection base point, information of a detection end point, and information of a detection planning route; set a marking threshold based on the flatness index information;

[0035] The road surface flatness measuring instrument is towed to the detection base point by a towing device; the road surface flatness measuring instrument is driven to move at a uniform speed along the detection planning route to the detection end point; during this process, the first moving wheel and the second moving wheel are in rolling contact with the road surface to drive the first moving shaft to rotate, and the first moving shaft rotates to drive the cleaning drive shaft to rotate, and the cleaning drive shaft provides power to enable the first cleaning mechanism and the second cleaning mechanism to clean the road surface; the measuring component is used to obtain the lateral and longitudinal elevation change data of the road surface, and synchronize the lateral and longitudinal elevation change data of the road surface to the basic model of the road section to be inspected; the lateral elevation change data of the road surface is matched with a preset marking threshold, and the longitudinal elevation change data of the road surface is matched with a preset marking threshold. When the lateral elevation change data of the road surface or the longitudinal elevation change data of the road surface exceeds the marking threshold, the marking component is used to mark the road surface, and the marking coordinates are synchronized to the basic model of the road section to be inspected; the output generates a flatness report.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The road surface flatness measuring instrument of the present invention provides support and connection through a main frame, and a moving component is arranged at the bottom of the main frame to provide a moving function; a cleaning component is arranged near the head of the frame to clean the road section to be measured, and debris such as gravel, soil, leaves, garbage and the like on the road surface are cleaned out to prevent the debris from covering up the actual unevenness of the road surface, or the debris itself from causing a false unevenness signal; the lateral and longitudinal elevation change data of the road surface are obtained through the measuring component, and after cleaning, the actual condition of the road surface can be more truly reflected, thereby ensuring the validity of the data; the uneven position of the road is marked by the marking component, so that subsequent staff can conveniently handle the uneven position of the road. By connecting the first moving shaft of the moving component with the cleaning drive shaft of the cleaning component, during the movement, the first moving wheel and the second moving wheel on the first moving shaft roll in contact with the road surface to drive the first moving shaft to rotate, and the cleaning drive shaft is driven to rotate by the rotation of the first moving shaft, and the cleaning drive shaft provides power to enable the first cleaning mechanism and the second cleaning mechanism to clean the road surface; the cleaning component can perform the cleaning task without the need for an additional power source, thereby avoiding the introduction of high-frequency noise due to vibration caused by engine vibration, which may cause irregular fluctuations in the measurement data and affect the accuracy of the road surface data. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the road surface flatness measuring instrument of the present invention;

[0039] Figure 2 It is a schematic structural diagram of the road surface flatness measuring instrument of the present invention from another angle;

[0040] Figure 3 A schematic diagram of the internal structure of the road surface flatness measuring instrument of the present invention;

[0041] Figure 4 It is a schematic diagram of the internal structure of the road surface flatness measuring instrument of the present invention;

[0042] Figure 5 It is a schematic diagram of the connection structure between the moving component and the cleaning component of the road surface flatness measuring instrument of the present invention;

[0043] Figure 6 is a cross-sectional view of the road surface flatness measuring instrument of the present invention;

[0044] Figure 7 It is a schematic structural diagram of a measuring component and a marking component of a road surface flatness measuring instrument of the present invention;

[0045] Figure 8 It is a schematic structural diagram of the measuring component and the marking component of the road surface flatness measuring instrument of the present invention at another angle;

[0046] Fig. 9 This is a structural exploded view of the measuring component and the marking component of the road surface flatness measuring instrument of the present invention from another angle.

[0047] In the figure: 10, main frame; 11, connecting frame; 111, first support plate; 112, second support plate; 113, upper limit plate; 114, lower limit plate; 12, main frame base; 121, dust cover; 122, linkage slot; 123, brushing hole; 124, lower measuring port; 125, marking port; 126, fixing frame; 13, main frame top seat; 131, upper measuring port; 132, suspension; 14, machine Frame head; 15, frame tail; 16, mainframe top cover; 17, counterweight; 20, moving assembly; 21, first moving mechanism; 211, first moving shaft; 212, first moving wheel; 213, second moving wheel; 214, first shock-absorbing and damping seat; 22, second moving mechanism; 221, second moving shaft; 222, third shock-absorbing and damping seat; 223, moving driving member; 224, moving driving wheel; 225, moving driven wheel; 226, moving synchronous belt; 30, cleaning assembly; 31, cleaning driving shaft; 311, first synchronous wheel; 312, second synchronous wheel; 313, first synchronous belt; 314, second bevel gear; 315, second shock-absorbing and damping seat; 32, first cleaning mechanism; 321, cleaning brush head; 322, cleaning brush seat; 323, cleaning brush shaft; 324, first bevel gear; 33, second cleaning mechanism; 40, measuring group Parts; 41. Measuring unit; 42. Laser sensor; 43. Lifting mechanism; 431. Sliding rod; 432. Induction seat; 433. Measuring roller; 434. Counterweight sleeve; 435. Ball slider; 436. Support spring; 50. Marking assembly; 51. Material box; 52. Feed pipe; 53. Pump body; 54. Feed pipe; 55. Discharging mechanism; 551. Discharging pipe; 552. Marking head; 553. Solenoid control valve. DETAILED DESCRIPTION

[0048] Below, in conjunction with the accompanying drawings and specific embodiments, the invention is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except as otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0049] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] Embodiment 1:

[0053] See also Figure 1-Figure 9 The present embodiment provides a road surface flatness measuring instrument, including a main frame 10 , and a moving component 20 , a cleaning component 30 , a measuring component 40 and a marking component 50 installed on the main frame 10 .

[0054] The main frame 10 of this embodiment provides an installation and support basis for each component. The main frame 10 includes a connecting frame 11, a main base 12 and a main top seat 13. The main base 12 and the main top seat 13 are respectively arranged at the bottom and the top of the connecting frame 11; the main frame 10 has a frame head 14 and a frame tail 15. The frame head 14 is the end in front of the road surface flatness measuring instrument during the movement, and the frame tail 15 is the end in the rear of the road surface flatness measuring instrument during the movement. The moving component 20 is arranged at the bottom of the main base 12, and the cleaning component 30, the measuring component 40 and the marking component 50 are arranged in sequence along the direction from the frame head 14 to the frame tail 15 to meet the process requirements of cleaning, measuring and marking.

[0055] The moving assembly 20 enables the main frame 10 to move on the road section to be tested, and drives the cleaning assembly 30 to clean the road section to be tested; the moving assembly 20 includes a first moving mechanism 21 and a second moving mechanism 22, the first moving mechanism 21 is arranged on the frame head 14, and the second moving mechanism 22 is arranged on the frame tail 15; the first moving mechanism 21 includes a first moving shaft 211, a first moving wheel 212 and a second moving wheel 213, and both ends of the first moving shaft 211 are rotatably connected to the main frame base 12; the first moving wheel 212 and the second moving wheel 213 are respectively arranged at opposite ends of the first moving shaft 211; the second moving mechanism 22 includes a second moving shaft 221, a third moving wheel and a fourth moving wheel, the second moving shaft 221 is rotatably connected to the main frame base 12, a third shock-absorbing damping seat 222 is arranged between the second moving shaft 221 and the main frame base 12, and the third moving wheel and the fourth moving wheel are respectively arranged at opposite ends of the second moving shaft 221.

[0056] The cleaning assembly 30 is arranged close to the frame head 14, and is used for cleaning the road section to be tested. The cleaning assembly 30 includes a cleaning drive shaft 31, a first cleaning mechanism 32 and a second cleaning mechanism 33; the cleaning drive shaft 31 is rotatably connected to the main frame base 12; the first cleaning mechanism 32 and the second cleaning mechanism 33 are respectively connected to the cleaning drive shaft 31 by transmission, and the first cleaning mechanism 32 and the second cleaning mechanism 33 are used for cleaning the road surface; the cleaning drive shaft 31 is connected to the first movable shaft 211 by transmission; the cleaning drive shaft 31 is driven to rotate by the first movable shaft 211, thereby providing power for the first cleaning mechanism 32 and the second cleaning mechanism 33 to clean the road surface.

[0057] The measuring component 40 is used to obtain the lateral and longitudinal elevation change data of the road surface.

[0058] The marking assembly 50 is used to mark a road surface.

[0059] Based on the above structure, the road surface flatness measuring instrument of this embodiment is supported and connected by the main frame 10, and a moving component 20 is provided at the bottom of the main frame 10 to provide a moving function; by providing a cleaning component 30 near the frame head 14, the road section to be measured is cleaned, and debris such as gravel, soil, leaves, garbage, etc. on the road surface are cleaned out to prevent the debris from covering up the actual unevenness of the road surface, or the debris itself causes a false unevenness signal, and the lateral and longitudinal elevation change data of the road surface are obtained through the measuring component 40. After cleaning, the actual condition of the road surface can be more realistically reflected to ensure the validity of the data; the uneven position of the road is marked by the marking component 50, which is convenient for subsequent staff to handle the uneven position of the road. In this embodiment, the first movable shaft 211 of the movable component 20 is connected by transmission with the cleaning drive shaft 31 of the cleaning component 30. During the movement, the first movable wheel 212 and the second movable wheel 213 on the first movable shaft 211 are in rolling contact with the road surface to drive the first movable shaft 211 to rotate. The cleaning drive shaft 31 is driven to rotate by the rotation of the first movable shaft 211. The cleaning drive shaft 31 provides power to enable the first cleaning mechanism 32 and the second cleaning mechanism 33 to clean the road surface. The cleaning component 30 can perform the cleaning task without the need for an additional power source, thereby avoiding the introduction of high-frequency noise due to vibration caused by the engine vibration, which causes irregular fluctuations in the measurement data and affects the accuracy of the road surface elevation data.

[0060] Specifically, a dust cover 121 is provided on the main engine base 12 of the present embodiment, and a first accommodating cavity is formed between the dust cover 121 and the main engine base 12, and the cleaning drive shaft 31 is arranged in the first accommodating cavity; a linkage groove 122 and a cleaning through hole 123 are provided at the bottom of the first accommodating cavity; by providing the dust cover 121, the cleaning component 30 is isolated from the measuring component 40, so as to avoid dust raised during the road surface cleaning process from affecting the measurement results, and at the same time, avoid dust from contaminating the internal structure of the road surface flatness measuring instrument.

[0061] A first synchronous wheel 311, a second synchronous wheel 312 and a first synchronous belt 313 are arranged between the first movable shaft 211 and the cleaning drive shaft 31; the first synchronous wheel 311 is connected to the first movable shaft 211, the second synchronous wheel 312 is connected to the cleaning drive shaft 31, and the first synchronous belt 313 passes through the linkage groove 122 and is respectively connected to the first synchronous wheel 311 and the second synchronous wheel 312; an elastic tensioning wheel may also be arranged on the first synchronous belt 313.

[0062] The first cleaning mechanism 32 includes a cleaning brush head 321, a cleaning brush seat 322 and a cleaning brush shaft 323; the cleaning brush seat 322 is fixed to the main engine base 12, a cleaning brush bearing is fixed in the cleaning brush seat 322, and the cleaning brush bearing is coaxially arranged with the cleaning brush through hole 123; a first bevel gear 324 is arranged at one end of the cleaning brush shaft 323, and the other end passes through the cleaning brush through hole 123 in sequence, and is connected with the cleaning brush bearing and the cleaning brush head 321; bristles are arranged at the bottom of the cleaning brush head 321; a second bevel gear 314 is arranged on the cleaning drive shaft 31, and the second bevel gear 314 is meshed with the first bevel gear 324. The specific structure of the second cleaning mechanism 33 and the connection structure with the cleaning drive shaft 31 are consistent with the first cleaning mechanism 32, which can be understood by those skilled in the art and will not be repeated here.

[0063] During use, the first movable shaft 211 and the cleaning drive shaft 31 are torqued through the synchronous pulley device, driving the cleaning drive shaft 31 to rotate, and the second bevel gear 314 meshes with the first bevel gear 324 to drive the cleaning brush shaft 323 to rotate, so that the cleaning brush seat 322 drives the cleaning brush head 321 to rotate, and the first cleaning mechanism 32 and the second cleaning mechanism 33 The cleaning head 321 rotates at the same time to clean up debris such as gravel, soil, leaves, garbage, etc. on the surface of the road to be inspected, so as to prevent the debris from covering up the actual unevenness of the road surface and improve the accuracy of data acquisition; by adjusting the transmission ratio between the first movable shaft 211 and the cleaning drive shaft 31, as well as the transmission ratio between the cleaning drive shaft 31 and the first cleaning mechanism 32, and the second cleaning mechanism 33, the rotation speed of the cleaning brush head 321 can be controlled, the structure is simple, and power loss is reduced.

[0064] Further, a first shock-absorbing and damping seat 214 is provided at the connection between the first movable shaft 211 and the main engine base 12, and the first shock-absorbing and damping seat 214 has a connecting end and a supporting end, and the connecting end and the supporting end of the first shock-absorbing and damping seat 214 are connected through a damping connection; the connecting end of the first shock-absorbing and damping seat 214 is connected to the end of the first movable shaft 211 through a bearing seat, and the supporting end of the first shock-absorbing and damping seat 214 is fixedly connected to the main engine base 12;

[0065] A second shock-absorbing and damping seat 315 is provided at the connection between the cleaning drive shaft 31 and the main engine base 12. The second shock-absorbing and damping seat 315 has a connecting end and a supporting end. The connecting end and the supporting end of the second shock-absorbing and damping seat 315 are connected via a damping connection. The connecting end of the second shock-absorbing and damping seat 315 is connected to the end of the cleaning drive shaft 31 via a bearing seat, and the supporting end of the second shock-absorbing and damping seat 315 is fixedly connected to the main engine base 12.

[0066] A first shock-absorbing and damping seat 214 is provided at the connection between the first moving shaft 211 and the main engine base 12, and a second shock-absorbing and damping seat 315 is provided at the connection between the cleaning drive shaft 31 and the main engine base 12. The damping inside the first shock-absorbing and damping seat 214 and the second shock-absorbing and damping seat 315 can be a composite elastic material and a supporting spring. The first shock-absorbing and damping seat 214 absorbs and isolates the vibration energy of the moving component 20 during its movement, and the second shock-absorbing and damping seat 315 absorbs and isolates the vibration energy of the cleaning component 30 during the road cleaning process, thereby ensuring the stability of the main frame 10 and improving the reliability and accuracy of the measurement results.

[0067] An elastic member is provided at the connection between the end of the cleaning brush shaft 323 and the cleaning brush head 321, and the elastic member provides an elastic force to drive the cleaning brush head 321 close to the ground, so that the bristles on the cleaning brush head 321 can be close to the ground and the road surface to be tested can be thoroughly cleaned. A telescopic member can also be provided at the connection between the end of the cleaning brush shaft 323 and the cleaning brush head 321, and the telescopic member can be used to drive the cleaning brush head 321 to rise and fall, and the cleaning brush head 321 can be raised when the instrument is on standby or passing through a special road section.

[0068] As an optional embodiment, the cleaning drive shaft 31 is sequentially formed with a first sub-shaft, a linkage sub-shaft and a second sub-shaft (not shown) along the axial direction; the first sub-shaft is used for transmission connection with the first cleaning mechanism 32, the linkage sub-shaft is used for linkage with the first moving shaft 211, and the second sub-shaft is used for connection with the second cleaning mechanism 33;

[0069] One end of the first sub-shaft is connected to the main engine base 12 through a second shock-absorbing and damping seat 315, and the other end is connected to the linkage sub-shaft through a first electromagnetic coupling, and the first electromagnetic coupling is used to control the on and off of the torque transmission between the first sub-shaft and the linkage sub-shaft; one end of the second sub-shaft is connected to the main engine base 12 through a second shock-absorbing and damping seat 315, and the other end is connected to the linkage sub-shaft through a second electromagnetic coupling, and the second electromagnetic coupling is used to control the on and off of the torque transmission between the second sub-shaft and the linkage sub-shaft; the first sub-shaft, the linkage sub-shaft and the second sub-shaft can be respectively provided with shock-absorbing support seats to support each sub-shaft. By respectively arranging the first electromagnetic coupling and the second electromagnetic coupling between the linkage sub-shaft and the first sub-shaft and the second sub-shaft, the on-off connection between the linkage sub-shaft and the first sub-shaft and the second sub-shaft is controlled by electromagnetic signals. During operation, the first sub-shaft and the second sub-shaft are connected to the linkage sub-shaft to drive the first cleaning mechanism 32 and the second cleaning mechanism 33 to work. During the transportation of the instrument, the power transmission between the linkage sub-shaft and the first sub-shaft and the second sub-shaft can be cut off to make the linkage sub-shaft idle and stop the first cleaning mechanism 32 and the second cleaning mechanism 33 from working, thereby avoiding waste of kinetic energy and saving energy and protecting the environment.

[0070] The second moving mechanism 22 of this embodiment also includes a moving driving member 223, a moving active wheel 224, a moving driven wheel 225 and a moving synchronous belt 226; the moving active wheel 224 is arranged on the second moving shaft 221, the moving driven wheel 225 is fixed to the first moving shaft 211, and the moving active wheel 224 and the moving driven wheel 225 are connected by the moving synchronous belt 226; the moving driving member 223 is fixed to the third shock-absorbing damping seat 222 through a mounting seat, and the moving driving member 223 has an output end, and the output end is connected to the moving active wheel 224; the moving driving member 223 provides power to drive the moving active wheel 224 and the moving driven wheel 225 to rotate, so that the main frame 10 moves on the road surface.

[0071] The main engine top seat 13 of the present embodiment is provided with an upper measuring opening 131, and the upper measuring opening 131 is arranged along the width direction of the main engine top seat 13; a suspension 132 is arranged above the upper measuring opening 131, and the suspension 132 is an inverted U-shaped frame; the main engine base 12 is provided with a lower measuring opening 124, and the lower measuring opening 124 is arranged below the gravity direction of the upper measuring opening 131, so that a measuring channel is formed between the upper measuring opening 131 and the lower measuring opening 124; the connecting frame 11 includes a first support plate 111 and a second support plate 112, and the first support plate 111 and the second support plate 112 are respectively arranged at both ends of the measuring channel; an upper limit plate 113 and a lower limit plate 114 are arranged between the first support plate 111 and the second support plate 112, and the upper limit plate 113 is linearly arrayed with a plurality of first positioning holes, and the lower limit plate 114 is correspondingly provided with a plurality of second positioning holes;

[0072] The measuring assembly 40 includes a plurality of measuring units 41, which are used for measuring elevation change data in the transverse and longitudinal directions of the road surface, and the plurality of measuring units 41 are linearly arranged in the measuring channel. In the case of a single straight measurement, the elevation change data measured at the same time point by a plurality of measuring units 41 arranged side by side can reflect the transverse flatness of the road surface, and the elevation change data measured on the time axis by a single measuring unit 41 can reflect the longitudinal flatness of the road surface.

[0073] Specifically, the measuring unit 41 includes a laser sensor 42 and a lifting mechanism 43. The laser sensor 42 is fixed to the bottom wall of the suspension 132. The lifting mechanism 43 includes a sliding rod 431. The sliding rod 431 is inserted into the first positioning hole and the second positioning hole. The top end of the sliding rod 431 extends to the upper measuring opening 131, and the bottom end of the sliding rod 431 extends to the lower measuring opening 124. The top end of the sliding rod 431 is fixedly connected to a sensing seat 432, and the sensing seat 432 is arranged opposite to the laser sensor 42. The bottom end of the sliding rod 431 is fixedly connected to a measuring wheel seat, and a measuring roller 433 is rollingly connected in the measuring wheel seat. During the measurement process, the measuring roller 433 is rotated. 33 is in contact with the road surface, driving the sensing seat 432 at the upper end of the sliding rod 431 to move up and down as the road surface elevation changes, and the laser sensor 42 records the position change of the sensing seat 432, that is, the elevation change of the road surface in real time; combining the advantages of mechanical structure and laser ranging technology, the measuring roller 433 is in direct contact with the road surface, which can accurately reflect the slight elevation change of the road surface, and the lifting mechanism 43 can effectively isolate the influence of the vibration of the main frame 10 on the measurement, thereby improving the measurement accuracy. The laser sensor 42 is not affected by ambient light and is suitable for measurement under various lighting conditions and various types of road surfaces, including asphalt roads, cement roads and gravel roads, and has a wide range of applications.

[0074] Furthermore, a counterweight sleeve 434 is fixedly connected to the bottom of the slide bar 431, and the bottom of the counterweight sleeve 434 is connected to the lower measuring port 124 through a ball slider 435; the top of the counterweight sleeve 434 is inserted into the second positioning hole; a support spring 436 is sleeved on the top of the slide bar 431, and one end of the support spring 436 abuts against the upper limit plate 113, and the other end abuts against the top surface of the counterweight sleeve 434; the support spring 436 provides an elastic force to drive the lifting mechanism 43 to slide downward. By providing the counterweight sleeve 434 and the support spring 436, it can be ensured that the roller always keeps in close contact with the road surface, reducing the phenomenon of the roller jumping or leaving the road surface caused by slight undulations of the road surface or vibration of the vehicle. The counterweight sleeve 434 increases the mass of the lifting mechanism 43 and increases its inertia, thereby reducing the interference of the vibration of the main frame 10, reducing the noise and error in the measurement, and improving the accuracy of the elevation measurement.

[0075] The main frame 10 also includes a main frame top cover 16, and the main frame top cover 16 covers the top of the main frame top seat 13; a second accommodating cavity is formed between the main frame top cover 16 and the main frame top seat 13; the suspension 132 is arranged in the second accommodating cavity, so that the laser sensor 42 is not disturbed by ambient light, thereby improving measurement accuracy.

[0076] A counterweight block 17 is fixed in the second accommodating cavity. By adding counterweights to the lifting mechanism 43 and the main frame 10 at the same time, the inertia of the entire measuring system is improved, and the influence of vehicle vibration and external interference on the measurement results is reduced, so that the pressure distribution of the main frame 10 on the road surface is more uniform, and the phenomenon of roller jumping or detaching from the road surface due to vehicle tilt or vibration is reduced, thereby further improving the overall performance and stability of the road surface flatness measuring instrument.

[0077] In this embodiment, a marking opening 125 is provided on the mainframe base 12. The marking opening 125 is provided on one side of the lower measuring opening 124. A fixing frame 126 is provided above the marking opening 125.

[0078] The marking assembly 50 includes a material box 51, a feed pipe 52, a pump body 53 and a feeding pipe 54; the pump body 53 is fixed to the main body base 12, and the feeding pipe 54 is fixed to the fixed frame 126; the pump body 53 has an input port and an output port, the input port of the pump body 53 is connected to the material box 51 through the feed pipe 52, and the output port of the pump body 53 is connected to the feeding pipe 54 through the feeding pipe 54; there are a plurality of discharge mechanisms 55 in a linear array on the feeding pipe 54; the number and position of the discharge mechanisms 55 are respectively arranged corresponding to the plurality of measuring units 41; and the sections passed by each measuring unit 41 are marked respectively by each discharge mechanism 55.

[0079] Specifically, the discharge mechanism 55 includes a discharge pipe 551, one end of which is connected to the feed pipe 54, and the other end of which extends to the bottom of the main engine base 12 through the marking port 125. The discharge end is connected to a marking head 552, and the discharge pipe 551 is connected to an electromagnetic control valve 553. The pump body 53 provides power to pump the marking pigment into each discharge mechanism 55, and the electromagnetic control valve 553 controls the on-off of the discharge pipe 551. When the measured elevation change data of the road surface in the horizontal direction or the elevation change data of the road surface in the longitudinal direction exceeds the marking threshold, the electromagnetic control valve 553 of the discharge mechanism 55 corresponding to the corresponding measurement unit 41 is opened, and the marking pigment is sprayed out through the marking head 552 to mark the road surface, providing intuitive guidance for subsequent road maintenance and repair. The operator can directly process according to the mark on the road surface without re-detection or positioning, saving a lot of time and labor costs.

[0080] Embodiment 2:

[0081] This embodiment provides a method for measuring the flatness of a road surface based on the first embodiment, comprising the following steps:

[0082] Providing a road surface smoothness measuring instrument as described in any one of Embodiment 1;

[0083] Acquire a detection task, the detection task including information of a road section to be detected and information of a flatness index, construct a basic model of the road section to be detected based on the information of the road section to be detected, the basic model of the road section to be detected having information of a detection base point, information of a detection end point, and information of a detection planning route; set a marking threshold based on the flatness index information;

[0084] The road surface flatness measuring instrument is towed to the detection base point by a towing device; the road surface flatness measuring instrument is driven to move at a uniform speed along the detection planning route to the detection end point; in this process, the first moving wheel 212 and the second moving wheel 213 are in rolling contact with the road surface to drive the first moving shaft 211 to rotate, and the first moving shaft 211 rotates to drive the cleaning drive shaft 31 to rotate, and the cleaning drive shaft 31 provides power to enable the first cleaning mechanism 32 and the second cleaning mechanism 33 to clean the road surface; the measuring component 40 is used to obtain the elevation change data of the road surface in the transverse and longitudinal directions, and synchronize the elevation change data of the road surface in the transverse and longitudinal directions to the basic model of the road section to be inspected; the elevation change data of the road surface in the transverse direction is matched with a preset marking threshold, and the elevation change data of the road surface in the longitudinal direction is matched with a preset marking threshold. When the elevation change data of the road surface in the transverse direction or the elevation change data of the road surface in the longitudinal direction exceeds the marking threshold, the marking component 50 is used to mark the road surface, and the marking coordinates are synchronized to the basic model of the road section to be inspected; and a flatness report is generated by output.

[0085] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A road surface flatness measuring instrument, characterized in that: It includes a main frame, and a moving component, a cleaning component, a measuring component and a marking component installed on the main frame; The main frame includes a connecting frame, a main frame base and a main frame top seat, wherein the main frame base and the main frame top seat are respectively arranged at the bottom and the top of the connecting frame; The main frame has a frame head and a frame tail; The moving assembly includes a first moving mechanism and a second moving mechanism, wherein the first moving mechanism is arranged at the head of the frame, and the second moving mechanism is arranged at the tail of the frame; the first moving mechanism includes a first moving shaft, a first moving wheel and a second moving wheel, wherein the first moving shaft is rotatably connected to the host base; the first moving wheel and the second moving wheel are respectively arranged at opposite ends of the first moving shaft; The cleaning assembly is arranged near the head of the frame, and the cleaning assembly comprises a cleaning drive shaft, a first cleaning mechanism and a second cleaning mechanism; the cleaning drive shaft is rotatably connected to the main frame base; the first cleaning mechanism and the second cleaning mechanism are respectively connected to the cleaning drive shaft in a transmission manner, and the first cleaning mechanism and the second cleaning mechanism are used to clean the road surface; the cleaning drive shaft is connected to the first movable shaft in a transmission manner; the cleaning drive shaft is driven to rotate by the first movable shaft, thereby providing power to enable the first cleaning mechanism and the second cleaning mechanism to clean the road surface; The measuring component is used to obtain the lateral and longitudinal elevation change data of the road surface; The marking assembly is used for marking a road surface.

2. A road surface flatness measuring instrument according to claim 1, characterized in that: A dust cover is provided on the main engine base, a first accommodating cavity is formed between the dust cover and the main engine base, and the cleaning drive shaft is arranged in the first accommodating cavity; a linkage groove and a cleaning through hole are provided at the bottom of the first accommodating cavity; A first synchronous wheel, a second synchronous wheel and a first synchronous belt are arranged between the first moving shaft and the cleaning drive shaft; the first synchronous wheel is connected to the first moving shaft, the second synchronous wheel is connected to the cleaning drive shaft, and the synchronous belt passes through the linkage slot and is connected to the first synchronous wheel and the second synchronous wheel respectively; The first cleaning mechanism comprises a cleaning brush head, a cleaning brush seat and a cleaning brush shaft; the cleaning brush seat is fixed to the main engine base, a cleaning brush bearing is fixed in the cleaning brush seat, and the cleaning brush bearing is coaxially arranged with the cleaning brush through hole; a first bevel gear is arranged at one end of the cleaning brush shaft, and the other end passes through the cleaning brush through hole in sequence and is connected with the cleaning brush bearing and the cleaning brush head; bristles are arranged at the bottom of the cleaning brush head; A second bevel gear is arranged on the cleaning drive shaft, and the second bevel gear is meshed with the first bevel gear.

3. A road surface flatness measuring instrument according to claim 2, characterized in that: A first shock-absorbing and damping seat is provided at the connection between the first movable shaft and the main engine base, and the first shock-absorbing and damping seat has a connecting end and a supporting end, and the connecting end and the supporting end of the first shock-absorbing and damping seat are connected via a damping connection; the connecting end of the first shock-absorbing and damping seat is connected to the end of the first movable shaft via a bearing seat, and the supporting end of the first shock-absorbing and damping seat is fixedly connected to the main engine base; A second shock-absorbing and damping seat is provided at the connection between the cleaning drive shaft and the main engine base, and the second shock-absorbing and damping seat has a connecting end and a supporting end, and the connecting end and the supporting end of the second shock-absorbing and damping seat are connected through a damping connection; the connecting end of the second shock-absorbing and damping seat is connected to the end of the cleaning drive shaft through a bearing seat, and the supporting end of the second shock-absorbing and damping seat is fixedly connected to the main engine base; An elastic member is provided at the connection between the end of the cleaning brush shaft and the cleaning brush head, and the elastic member provides an elastic force to drive the cleaning brush head close to the ground.

4. A road surface flatness measuring instrument according to claim 3, characterized in that: The cleaning drive shaft is formed with a first sub-shaft, a linkage sub-shaft and a second sub-shaft in sequence along the axial direction; the first sub-shaft is transmission-connected with the first cleaning mechanism, the linkage sub-shaft is linked with the first moving shaft, and the second sub-shaft is connected with the second cleaning mechanism; One end of the first split shaft is connected to the main engine base through a second shock-absorbing and damping seat, and the other end is connected to the linkage split shaft through a first electromagnetic coupling, and the first electromagnetic coupling is used to control the on and off of the torque transmission between the first split shaft and the linkage split shaft; one end of the second split shaft is connected to the main engine base through a second shock-absorbing and damping seat, and the other end is connected to the linkage split shaft through a second electromagnetic coupling, and the second electromagnetic coupling is used to control the on and off of the torque transmission between the second split shaft and the linkage split shaft.

5. The road surface flatness measuring instrument according to claim 3, characterized in that: The second moving mechanism comprises a second moving shaft, a third moving wheel and a fourth moving wheel, the second moving shaft is rotatably connected to the host base, a third shock-absorbing damping seat is arranged between the second moving shaft and the host base, and the third moving wheel and the fourth moving wheel are respectively arranged at opposite ends of the second moving shaft; The second moving mechanism also includes a moving driving member, a moving active wheel, a moving driven wheel and a moving synchronous belt; the moving active wheel is arranged on the second moving shaft, the moving driven wheel is fixed to the first moving shaft, and the moving active wheel and the moving driven wheel are connected by the moving synchronous belt; the moving driving member is fixed to the third shock-absorbing and damping seat through a mounting seat, and the moving driving member has an output end, and the output end is connected to the moving active wheel; the moving driving wheel and the moving driven wheel are driven to rotate by providing power through the moving driving member, so that the main frame moves on the road surface.

6. The road surface flatness measuring instrument according to claim 1, characterized in that: The main engine top seat is provided with an upper measuring opening, and the upper measuring opening is arranged along the width direction of the main engine top seat; a suspension is arranged above the upper measuring opening; the main engine base is provided with a lower measuring opening, and the lower measuring opening is arranged below the gravity direction of the upper measuring opening, so that a measuring channel is formed between the upper measuring opening and the lower measuring opening; the connecting frame includes a first support plate and a second support plate, and the first support plate and the second support plate are respectively arranged at two ends of the measuring channel; an upper limit plate and a lower limit plate are arranged between the first support plate and the second support plate, and a plurality of first positioning holes are linearly arrayed on the upper limit plate, and a plurality of second positioning holes are correspondingly arranged on the lower limit plate; The measuring assembly comprises a plurality of measuring units, and the measuring units are used for transverse and longitudinal elevation change data of a road surface. The plurality of measuring units are linearly arranged in the measuring channel.

7. A road surface flatness measuring instrument according to claim 6, characterized in that: The measuring unit comprises a laser sensor and a lifting mechanism, wherein the laser sensor is fixed to the bottom wall of the suspension; the lifting mechanism comprises a sliding rod, wherein the sliding rod is inserted through the first positioning hole and the second positioning hole, wherein the top end of the sliding rod extends to the upper measuring opening, and the bottom end of the sliding rod extends to the lower measuring opening; the top end of the sliding rod is fixedly connected to a sensing seat, wherein the sensing seat is arranged opposite to the laser sensor; the bottom end of the sliding rod is fixedly connected to a measuring wheel seat, wherein a measuring roller is rollingly connected to the measuring wheel seat; A counterweight sleeve is fixedly connected to the lower part of the slide bar, and the bottom of the counterweight sleeve is connected to the lower measuring port through a ball slider; the top of the counterweight sleeve is inserted into the second positioning hole; a support spring is sleeved on the upper part of the slide bar, one end of the support spring abuts against the upper limit plate, and the other end abuts against the top surface of the counterweight sleeve; the support spring provides an elastic force to drive the lifting mechanism to slide downward; The main frame also includes a main frame top cover, which covers the top of the main frame top seat; a second accommodating cavity is formed between the main frame top cover and the main frame top seat; the suspension is arranged in the second accommodating cavity; a counterweight is fixed in the second accommodating cavity.

8. The road surface flatness measuring instrument according to claim 6, characterized in that: A marking opening is provided on the main engine base, the marking opening is arranged on one side of the lower measuring opening, and a fixing frame is arranged above the marking opening; The marking component includes a material box, a feed pipe, a pump body and a feeding pipe; the pump body is fixed to the main body base, and the feeding pipe is fixed to the fixed frame; the pump body has an input port and an output port, the pump body input port is connected to the material box through the feed pipe, and the pump body output port is connected to the feeding pipe through the feeding pipe; there are a plurality of discharge mechanisms in a linear array on the feeding pipe; the number and position of the discharge mechanisms are respectively arranged corresponding to the plurality of measuring units.

9. The road surface flatness measuring instrument according to claim 8, characterized in that: The discharging mechanism comprises a discharging pipe, one end of which is connected to the feeding pipe, and the other end of which extends to the bottom of the main engine base through the marking port, a marking head is connected to the end of the discharging end, and an electromagnetic control valve is connected to the discharging pipe.

10. A method for measuring road surface flatness, characterized in that: The following steps are included: Providing a road surface flatness measuring instrument as described in any one of claims 1 to 9; Acquire a detection task, the detection task including information of a road section to be detected and information of a flatness index, and construct a basic model of the road section to be detected based on the information of the road section to be detected, wherein the basic model of the road section to be detected has information of a detection base point, information of a detection end point, and information of a detection planning route; Setting a marking threshold based on the flatness index information; The road surface flatness measuring instrument is towed to the detection base point by a towing device; the road surface flatness measuring instrument is driven to move at a uniform speed along the detection planning route to the detection end point; during this process, the first moving wheel and the second moving wheel are in rolling contact with the road surface to drive the first moving shaft to rotate, and the first moving shaft rotates to drive the cleaning drive shaft to rotate, and the cleaning drive shaft provides power to enable the first cleaning mechanism and the second cleaning mechanism to clean the road surface; the measuring component is used to obtain the lateral and longitudinal elevation change data of the road surface, and synchronize the lateral and longitudinal elevation change data of the road surface to the basic model of the road section to be inspected; the lateral elevation change data of the road surface is matched with a preset marking threshold, and the longitudinal elevation change data of the road surface is matched with a preset marking threshold. When the lateral elevation change data of the road surface or the longitudinal elevation change data of the road surface exceeds the marking threshold, the marking component is used to mark the road surface, and the marking coordinates are synchronized to the basic model of the road section to be inspected; the output generates a flatness report.

Images