Embedded pavement depth testing device and method

Abstract

The application provides an embedded road surface depth testing device and method. The embedded road surface depth testing device comprises a mounting member, a weight and a testing block. The mounting member is internally provided with a falling channel, and the bottom of the falling channel is provided with an opening. The weight is arranged in the falling channel. The weight has a first state and a second state. In the first state, the weight is hung in the falling channel. In the second state, the weight can freely fall. The testing block is arranged at one end of the weight facing the opening. The one end of the testing block facing the opening is provided with a colored surface. The embedded road surface depth testing device of the application can determine the depth of the testing block embedded in the road surface to be tested by making the colored surface of the testing block collide with the road surface to be tested to be colored. The road surface texture of the contact part can be screened from the road surface texture of the colored area according to the embedded depth, which is used to evaluate the anti-skid performance of the road surface to be tested. The method effectively solves the defects of inconvenient measurement and large evaluation result error in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road surface anti-skid performance testing, and in particular to a road surface embedding depth testing device and method. BACKGROUND

[0002] Periodic monitoring of road surface anti-skid performance is of great significance for formulating maintenance programs and ensuring traffic safety.

[0003] Currently, the friction coefficient measured value is usually taken as an index to evaluate road surface anti-skid performance, but the measurement of the friction coefficient is easily affected by factors such as environment and equipment, leading to inconvenience in measurement and limiting the application. In addition, there are road surface anti-skid performance evaluation methods that take road surface texture as the test object, and the application potential is increasingly prominent; however, the existing evaluation methods that take road surface texture as the test object ignore the interaction between the tire and the road surface. Due to the unevenness of the road surface, the tire will embed into the recessed part of the road surface, but in practice, the tire can only contact the road surface within a certain depth range, that is, only part of the road surface can interact with the tire. The existing evaluation method is based on the road surface texture data in the entire depth range to obtain the evaluation index, resulting in a large error in the evaluation result. SUMMARY

[0004] The present application provides a road surface embedding depth testing device and method to solve the defects of the existing technology in the evaluation of road surface anti-skid performance, such as inconvenience in measurement and large error in evaluation results.

[0005] In a first aspect, the present application provides a road surface embedding depth testing device, comprising:

[0006] A mounting member is provided with a vertical drop channel inside, and the bottom of the drop channel has an open mouth;

[0007] A heavy hammer is movably arranged in the drop channel, and the heavy hammer has a first state and a second state. In the first state, the heavy hammer is hung from one end of the drop channel away from the open mouth. In the second state, the heavy hammer can freely fall in the drop channel.

[0008] A test block is arranged at one end of the heavy hammer facing the open mouth, and one end of the test block facing the open mouth is provided with a colored surface.

[0009] According to the road surface embedding depth testing device provided by the present application, the road surface embedding depth testing device further comprises a lifting assembly arranged in the mounting member and connected with the heavy hammer, and the lifting assembly is used to drive the heavy hammer to move in the drop channel away from the open mouth.

[0010] The embedded pavement depth testing device provided by the present application is characterized in that the mounting member is provided with at least one opening, the opening is communicated with the falling channel, and the size of the at least one opening is greater than that of the testing block.

[0011] The embedded pavement depth testing device provided by the present application is characterized in that the embedded pavement depth testing device further comprises a guide connecting member connected with the weight; a guide portion extending in the vertical direction is arranged in the falling channel, the end of the guide connecting member extends out of the outer periphery of the weight and is connected with the guide portion, and the guide connecting member can slide along the guide portion.

[0012] The embedded pavement depth testing device provided by the present application is characterized in that the guide portion comprises a guide groove, the end of the guide connecting member extends into the guide groove and abuts against the guide groove, and the width of the guide groove gradually decreases from the inner side to the outer side of the falling channel.

[0013] The embedded pavement depth testing device provided by the present application is characterized in that the guide connecting member is connected with the middle part of the end of the weight away from the opening, and the guide connecting member is connected with the lifting assembly.

[0014] The embedded pavement depth testing system further comprises a driving connecting member and a blocking member, one end of the driving connecting member is connected with the edge of the weight, the other end of the driving connecting member is connected with the end of the guide connecting member away from the weight, and the blocking member is arranged on the mounting member and is arranged opposite to the opening with a size greater than that of the testing block on the mounting member, the blocking member has a third state and a fourth state, in the third state, the blocking member extends into the inside of the falling channel, when the weight moves away from the opening, the driving connecting member can abut against the blocking member to drive the weight to rotate, so that the testing block passes out of the opening opposite to the blocking member, and in the fourth state, the blocking member is located outside the falling channel.

[0015] The embedded pavement depth testing device provided by the present application is characterized in that the mounting member comprises a cylinder and at least one reinforcing member, one end of the cylinder is the opening, the cylinder is spliced by at least two plate bodies, and the at least one reinforcing member is sleeved on the circumferential outer side of the cylinder.

[0016] The embedded pavement depth testing device provided by the present application is characterized in that the bottom of the mounting member is provided with a moving member, and / or the mounting member is provided with a holding member.

[0017] In the second aspect, the present application further provides an embedded pavement depth testing method based on the embedded pavement depth testing device according to any one of the above.

[0018] coloring a first color on the to-be-tested road surface;

[0019] placing the installation on the to-be-tested road surface with the opening facing the to-be-tested road surface, placing the weight into the falling passage of the installation, and making the weight in a first state;

[0020] coloring a second color on the colored surface of the test block;

[0021] controlling the weight to switch to a second state and make the weight free-fall to drive the colored surface of the test block to impact the to-be-tested road surface and form a dyed area of the second color on the to-be-tested road surface;

[0022] acquiring an image of the dyed area of the to-be-tested road surface;

[0023] determining a proportion value of a road surface area bearing a load when the test block contacts the to-be-tested road surface to a nominal contact area according to the image of the dyed area;

[0024] determining a depth of the test block embedded in the to-be-tested road surface according to the proportion value and a road surface bearing area ratio curve of the dyed area of the second color.

[0025] The embedded road surface depth testing method provided by the present application further comprises the step of acquiring the road surface bearing area ratio curve of the dyed area of the second color, which comprises:

[0026] acquiring road surface point cloud data of the dyed area of the second color on the to-be-tested road surface;

[0027] determining the road surface bearing area ratio curve according to the cumulative distribution probability of the point cloud at different depths of the dyed area of the second color.

[0028] The embedded pavement depth testing device and method provided by the application is based on the color retention method, a heavy hammer is arranged to freely fall, the colored surface of the testing block collides with the pavement to be tested and stains the pavement to be tested, the actual contact position of the testing block and the pavement to be tested is displayed through the stained position, the depth of the testing block embedded in the pavement to be tested can be determined according to the ratio of the actual contact area of the testing block and the pavement to be tested to the nominal contact area of the testing block and the pavement to be tested, the pavement texture of the contact position is screened out from the pavement texture of the stained area of the pavement to be tested, the pavement texture data of the contact position is taken as the basis to obtain the evaluation index, and the evaluation index is used to evaluate the skid resistance of the pavement to be tested, and the close texture-skid resistance relationship is established; and the collection of the pavement texture is not affected by the environment and equipment, and only the pavement texture of the actual contact position of the testing block and the pavement to be tested is taken as the evaluation index, the influence of the pavement texture of the non-contact position on the evaluation result is eliminated, the evaluation result is more accurate, and the defects of inconvenient measurement and large error of the evaluation result in the prior art are effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0030] Figure 1 is a sectional view of the embedded pavement depth testing device provided by the embodiment of the application;

[0031] Figure 2 is a three-dimensional structural schematic view of the embedded pavement depth testing device provided by the embodiment of the application;

[0032] Figure 3 is a partial schematic view of the embedded pavement depth testing device provided by the embodiment of the application;

[0033] Figure 4 is a flowchart of the embedded pavement depth testing method provided by the embodiment of the application;

[0034] Figure 5 is a pavement bearing area ratio curve diagram provided by the embodiment of the application.

[0035] Reference signs:

[0036] 1: mounting piece; 11: falling channel; 12: open mouth; 13: opening; 14: guide part; 15: cylinder; 16: reinforcing piece; 17: moving piece; 18: holding piece;

[0037] 2: weight; 3: test block;

[0038] 4: lifting assembly; 41: rope; 42: pulley;

[0039] 5: guide connector; 51: connecting rod; 52: guide rod;

[0040] 6: drive connector; 7: stopper; 8: ring. DETAILED DESCRIPTION

[0041] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] The technical solutions in the present application will be described below in conjunction with the drawings in the present application. Figures 1 to 3 The present application provides an embedded pavement depth testing device.

[0043] As shown in Figures 1 to 3 the present application provides an embedded pavement depth testing device, which comprises a mounting 1, a weight 2 and a test block 3. The mounting 1 is internally provided with a vertical falling channel 11, and the bottom of the falling channel 11 is provided with an opening 12. The weight 2 is movably arranged in the falling channel 11. The weight 2 has a first state and a second state. In the first state, the weight 2 is hung at one end of the falling channel 11 away from the opening 12. In the second state, the weight 2 can freely fall in the falling channel 11. The test block 3 is arranged at one end of the weight 2 facing the opening 12. One end of the test block 3 facing the opening 12 is provided with a colored surface.

[0044] In the embodiment, the bottom of the mounting member 1 is used to support on the road surface to be tested, so that the opening 12 at the bottom of the falling channel 11 is directed towards the road surface to be tested; in the first state, the weight 2 is hung in the falling channel 11 away from the opening 12, i.e. the weight 2 and the test block 3 are hung above the road surface to be tested; in the second state, the weight 2 freely falls in the falling channel 11 and drives the test block 3 to impact the road surface to be tested, and the end of the test block 3 directed towards the opening 12 is provided with a colored surface, which is used for coloring, so that the test block 3 can dye the road surface to be tested when impacting the road surface to be tested. The road surface to be tested is uneven, so that part of the test block 3 will be embedded in the recessed part of the road surface to be tested, so that the colored surface of the test block 3 cannot be in contact with the road surface to be tested and be dyed in all areas; according to the actual dyed part, the part of the road surface to be tested actually in contact with the test block 3 can be determined, so that the actual contact area of the test block 3 and the nominal contact area of the test block 3 can be determined; in the case that the road surface bearing area ratio curve of the dyed area of the road surface to be tested is obtained, according to the ratio of the actual contact area of the test block 3 to the nominal contact area of the test block 3, the depth of the test block 3 embedded in the road surface to be tested can be determined according to the depth-bearing area relationship reflected by the road surface bearing area ratio curve.

[0045] The nominal contact area of the test block 3 is the area surrounded by the outer contour of the dyed area of the road surface to be tested, which is equal to the area of the colored surface of the test block 3.

[0046] The test block 3 can be a rubber block to simulate the tread rubber of the tire; the rubber block has a certain thickness, for example, the thickness of the rubber block is 10 mm. According to the tire-road contact research, the tire can only interact with part of the road surface texture within a certain depth, and this depth is closely related to the surface texture of the road surface. Therefore, the research on the depth of the tread rubber embedded in the road surface texture is crucial for establishing a close texture-slip resistance relationship and realizing non-contact testing of slip resistance. Of course, the test block 3 can also be a material block of other materials to study the depth of other materials embedded in the road surface texture.

[0047] The embedded road surface depth testing device of the present application can be used outdoors to evaluate the depth of the tread rubber embedded in the road surface texture on different road surfaces, realize rapid outdoor testing of the depth of the rubber embedded in the road surface, and measure the contact area between the rubber and the real road surface.

[0048] The embedded road surface depth testing device of the present application can also be used indoors to simulate the road surface to be tested by preparing a road surface test piece and perform embedded road surface depth testing.

[0049] The embedded road surface depth testing device can be used for simulating the interaction between a vehicle and a road surface, and the situation that a tire of the vehicle is embedded into the road surface to be tested by impacting the road surface to be tested by the weight 2 and the testing block 3, wherein the weight 2 is used for increasing the impact force when the testing block 3 impacts the road surface to be tested, and the depth of the testing block 3 embedded into the road surface to be tested is obtained through testing, so as to facilitate extracting the road surface texture of the actual contact position of the testing block 3 from the road surface texture of the dyed area of the road surface, taking the road surface texture of the contact position as a basis to obtain an evaluation index, and evaluating the anti-skid performance of the road surface to be tested.

[0050] The embedded road surface depth testing device is based on the color retention method, the coloring surface of the testing block 3 is collided with the road surface to be tested and the road surface to be tested is dyed by allowing the weight 2 to freely fall, and the actual contact position of the testing block 3 with the road surface to be tested is displayed through the dyed position; in the case that the road surface bearing area ratio curve of the dyed area of the road surface to be tested is obtained, the depth of the testing block 3 embedded into the road surface to be tested can be determined according to the ratio of the actual contact area of the road surface to be tested with the testing block 3 to the nominal contact area of the road surface to be tested with the testing block 3, so as to facilitate screening the road surface texture of the contact position of the testing block 3 from the road surface texture of the dyed area of the road surface to be tested; taking the road surface texture of the contact position as a basis to obtain an evaluation index, evaluating the anti-skid performance of the road surface to be tested, establishing a close texture-anti-skid relationship; the collection of the road surface texture is not easily affected by environmental factors and equipment, and only the road surface texture of the actual contact position of the testing block 3 is taken as the evaluation index, so the influence of the road surface texture of the non-contact position on the evaluation result is eliminated, the evaluation result is more accurate, and the defects of inconvenient measurement and large error of the evaluation result in the prior art are effectively solved.

[0051] Specifically, the projection of the weight 2 on the cross section of the falling channel 11 completely covers the projection of the testing block 3 on the cross section of the falling channel 11.

[0052] Specifically, as shown in Figure 1 the embedded road surface depth testing device further comprises a lifting assembly 4 arranged on the mounting member 1 and connected with the weight 2, and the lifting assembly 4 is used for driving the weight 2 to move in the falling channel 11 towards the direction away from the opening 12.

[0053] In this embodiment, by arranging the lifting assembly 4, when the embedded road surface depth testing device is used, the lifting assembly 4 drives the weight 2 to move towards the direction away from the opening 12, so that the weight 2 entering the falling channel 11 or the weight 2 completing the free falling in the second state reaches the first state, and the weight 2 can be hoisted in the falling channel 11 to prepare for the next free falling, without the need for the tester to manually move the weight 2 into the falling channel 11, so that the operation is convenient and practical.

[0054] In one specific embodiment, the lifting assembly 4 comprises a rope 41 and a pulley 42, the pulley 42 is arranged at the end of the mounting member 1 away from the opening 12, one end of the rope 41 is outside the falling channel 11, the other end of the rope 41 is arranged around the pulley 42 and enters the falling channel 11 from the end of the falling channel 11 away from the opening 12, the rope 41 is connected with the weight 2; pulling the end of the rope 41 outside the falling channel 11 can drive the weight 2 away from the opening 12 until it is in the first state, and the weight 2 is switched to the second state to freely fall after the rope 41 is released.

[0055] In this embodiment, the mounting member 1 is also provided with a fixing part, and the rope 41 can be tied to the fixing part to maintain the weight 2 in the first state, thereby freeing the hands and facilitating use.

[0056] In one specific embodiment, the number of pulleys 42 is two, the two pulleys 42 are coplanar, and the projections of the two farthest points of the two pulleys in the horizontal direction on the cross section of the falling channel 11 are one on the central axis of the falling channel 11 and the other on the outside of the falling channel 11, so that the weight 2 connected with the rope 41 is in the middle of the falling channel 11, avoiding the weight 2 from contacting the mounting member 1 by mistake.

[0057] Specifically, the mounting member 1 is provided with at least one opening 13, the opening 13 is in communication with the falling channel 11, and the size of the at least one opening 13 is greater than that of the test block 3.

[0058] In this embodiment, by arranging the opening 13 in communication with the falling channel 11, it is convenient for the tester to observe the inside of the falling channel 11 or operate the components such as the weight 2 and the test block 3 in the falling channel 11; in addition, the size of the at least one opening 13 is greater than that of the test block 3, so that the tester can move the weight 2 and the test block 3 in the falling channel 11 out of the opening 13 with a size greater than that of the test block 3, in order to color the coloring surface, without coloring the coloring surface first and then putting the weight 2 and the test block 3 into the falling channel 11, effectively avoiding the coloring surface from contacting the road surface to be tested by mistake, so that the road surface to be tested is dyed after affecting the test result, ensuring that the result of the embedded road surface depth test is accurate and reliable, and having strong practicality.

[0059] In one specific embodiment, when the embedded road surface depth test device is used, the weight 2 and the test block 3 with an uncolored coloring surface can be put into the falling channel 11 and directly placed on the road surface to be tested, the tester can pull the rope 41 to make the test block 3 separate from the road surface to be tested, and then move the weight 2 and the test block 3, so that the test block 3 passes out of the opening 13 with a size greater than that of the test block 3, and then the test block 3 is put back into the falling channel 11 after coloring the coloring surface of the test block 3.

[0060] In one embodiment, the rope 41 is detachably connected with the weight 2; there are at least two openings 13 with different heights, and a tester can reach into the falling channel 11 through the lower opening 13 to complete the connection and disconnection of the rope 41 and the weight 2, the upper opening 13 is larger than the size of the test block 3, and the test block 3 can pass in and out, so that the colored surface after coloring does not come into contact with the road surface to be tested.

[0061] Specifically, the embedded road surface depth testing device further comprises a guide connecting piece 5 connected with the weight 2; the falling channel 11 is provided with a guide portion 14 extending in the vertical direction, and the end of the guide connecting piece 5 extends out of the outer periphery of the weight 2 and is connected with the guide portion 14, and the guide connecting piece 5 can slide along the guide portion 14.

[0062] In this embodiment, by arranging the guide connecting piece 5 and the guide portion 14, and by enabling the guide connecting piece 5 to slide along the guide portion 14, the guide connecting piece 5 can guide and limit the weight 2, so that the weight 2 can freely fall in the vertical direction in the second state, and the weight 2 is prevented from shaking and changing the movement direction when freely falling, so that the test block 3 can vertically impact the road surface to be tested, the test error is reduced, and the embedded road surface depth test result is more accurate and reliable.

[0063] In one specific embodiment, the guide connecting piece 5 comprises a connecting rod 51 and a guide rod 52, the connecting rod 51 is vertically arranged, the bottom end of the connecting rod 51 is connected with one end of the weight 2 away from the opening 12, the other end of the connecting rod 51 is connected with the middle part of the guide rod 52, and the guide rod 52 is horizontally arranged, and the two ends of the guide rod 52 respectively extend out of the outer periphery of the weight 2 and are connected with the two guide portions 14.

[0064] In one embodiment, as shown in Figure 1 the guide portion 14 comprises a guide groove, the end of the guide connecting piece 5 extends into the guide groove and abuts against the guide groove, and the width of the guide groove gradually decreases from the inner side to the outer side of the falling channel 11.

[0065] In this embodiment, the guide groove has a simple structure, the guide connecting piece 5 can slide along the extension direction of the guide groove to achieve the guiding effect; by arranging the guide groove with the width gradually decreasing from the inner side to the outer side of the falling channel 11, and by arranging the end of the guide connecting piece 5 abutting against the guide groove, the groove body of the guide groove can limit the end of the guide connecting piece 5, so that the end of the guide connecting piece 5 is prevented from moving in the horizontal direction in the guide groove, thereby preventing the guide connecting piece 5 from shaking, and further preventing the movement track of the weight 2 from deviating to cause test error, so that the embedded road surface depth test result is more accurate and reliable.

[0066] In one specific embodiment, two guide grooves are arranged on the opposite sides in the falling channel 11, and the two ends of the guide rod 52 respectively extend into the two guide grooves.

[0067] In one embodiment, the guide connecting piece 5 is connected to the middle of the end of the weight 2 away from the opening 12, and the guide connecting piece 5 is connected to the lifting assembly 4; the embedded pavement depth testing system further comprises a driving connecting piece 6 and a blocking piece 7, one end of the driving connecting piece 6 is connected to the edge of the weight 2, and the other end of the driving connecting piece 6 is connected to the end of the guide connecting piece 5 away from the weight 2; the blocking piece 7 is arranged on the mounting piece 1 and is arranged opposite to an opening 13 on the mounting piece 1 which is larger in size than the testing block 3, and the blocking piece 7 has a third state and a fourth state, in the third state, the blocking piece 7 extends into the falling channel 11, when the weight 2 moves towards the direction away from the opening 12, the driving connecting piece 6 can abut against the blocking piece 7 to drive the weight 2 to rotate, so that the testing block 3 passes out of the opening 13 opposite to the blocking piece 7; in the fourth state, the blocking piece 7 is located outside the falling channel 11.

[0068] In this embodiment, the guide connecting piece 5 is connected to the lifting assembly 4, and the lifting assembly 4 can drive the guide connecting piece 5 to ascend and descend, thereby driving the weight 2 to ascend and descend; the guide connecting piece 5 is connected to the middle of the end of the weight 2 away from the opening 12, and the connecting position of the guide connecting piece 5 and the weight 2 is on the same vertical line with the center of gravity of the weight 2, so that the weight 2 moves more stably; in the third state, when the lifting assembly 4 drives the weight 2 to ascend, the driving connecting piece 6 abuts against the blocking piece 7, so that the testing block 3 deviates towards the opening 13 on the side opposite to the blocking piece 7 which is larger in size than the testing block 3, until the testing block 3 passes out of the falling channel 11, so as to color the coloring surface; after coloring, the blocking piece 7 is switched to the fourth state, and the testing block 3 automatically returns to the falling channel 11, without the need for the tester to manually reach into the falling channel 11 to take out the testing block 3, so that the operation and use are more convenient and fast, the testing efficiency is improved, and the practicability is strong.

[0069] In one specific embodiment, the middle of the guide rod 52 is provided with a lifting ring 8, and the rope 41 can be tied to the lifting ring 8, and the rope 41 can be pulled to drive the weight 2 to move.

[0070] Further, in this embodiment, one end of the rope 41 located in the falling channel 11 can be provided with a hook, and the hook is connected to the lifting ring 8.

[0071] In one specific embodiment, the driving connecting piece 6 comprises an inclined rod, one end of the inclined rod is connected to the edge of the weight 2, and the other end of the inclined rod is connected to the middle of the guide rod 52, so as to form a guide inclined rod structure extending in the vertical direction; when the weight 2 moves away from the opening 12 in the vertical direction, the inclined rod abuts against and slides relative to the blocking piece 7, the blocking piece 7 drives the weight 2 to rotate towards the direction away from the blocking piece 7, i.e. towards the opening 13 which is larger in size than the testing block 3, so as to finally make the testing block 3 extend out of the falling channel 11 from the opening 13.

[0072] In one specific embodiment, the blocking piece 7 comprises a blocking block provided with threads, and is threadedly connected with the mounting piece 1. The blocking piece 7 is switched between the third state and the fourth state by screwing the blocking block.

[0073] In another specific embodiment, the blocking piece 7 comprises a pull-out blocking block, and the mounting piece 1 is provided with a through hole in communication with the falling channel 11. In the third state, the pull-out blocking block is clamped in the through hole and extends into the falling channel 11. In the fourth state, the pull-out blocking block does not extend into the falling channel 11.

[0074] Specifically, the mounting piece 1 comprises a barrel 15 and at least one reinforcing piece 16. One end of the barrel 15 is an open end 12. The barrel 15 is spliced by at least two plate bodies. The at least one reinforcing piece 16 is sleeved on the circumferential outer side of the barrel 15.

[0075] In this embodiment, the barrel 15 is spliced by at least two plate bodies, so that the mounting piece 1 is convenient to disassemble and store, and is convenient to maintain and replace. Meanwhile, the barrel 15 is convenient to set the guide part 14, i.e., the guide part 14 is set on the plate body first, and then the barrel 15 is assembled. The circumferential outer side of the barrel 15 is provided with the reinforcing piece 16, so that the barrel 15 is reinforced, the plate bodies are prevented from being scattered, and the structural stability of the mounting piece 1 is ensured.

[0076] In one specific embodiment, the other end of the barrel 15 away from the open end 12 is also open. The barrel 15 is spliced by two arc plates. The opposite edges of the two arc plates are respectively provided with a positioning piece and a positioning groove, so that the two arc plates are conveniently positioned and spliced.

[0077] Further, in this embodiment, the two plate bodies are spliced, and two guide grooves are formed at the two splicing seams.

[0078] In one embodiment, the reinforcing piece 16 comprises an annular reinforcing strip, which is clamped on the circumferential outer side of the barrel 15 to reinforce the barrel 15. For example, the annular reinforcing strip is an elastic reinforcing strip, which reinforces the barrel 15 by contraction force.

[0079] In one specific embodiment, the circumferential outer side of the barrel 15 is provided with an annular groove, and the annular reinforcing strip is arranged in the annular groove to prevent the annular reinforcing strip from being deviated.

[0080] In one specific embodiment, two annular reinforcing strips are arranged at intervals along the axis direction of the barrel 15, so that the reinforcing effect is reliable and the cost is saved.

[0081] Specifically, the bottom of the mounting piece 1 is provided with a moving piece 17.

[0082] In the embodiment, the mobile piece 17 is arranged at the bottom of the mounting piece 1, so that the mounting piece 1 is convenient to move, the embedded pavement depth testing device is convenient to transfer, and the embedded pavement depth testing device is convenient to use and saves time and effort.

[0083] In one specific embodiment, the mobile piece 17 comprises a foldable wheel.

[0084] When the embedded pavement depth testing device needs to be moved, the foldable wheel is laid down, so that the mounting piece 1 is moved to the pavement to be tested; after the pavement to be tested is reached, the foldable wheel is folded up, so that the mounting piece 1 is placed on the pavement to be tested.

[0085] Specifically, the mounting piece 1 is provided with a holding piece 18.

[0086] In the embodiment, the holding piece 18 is arranged, so that the tester can control and move the mounting piece 1 through the holding piece 18, for example, the mounting piece 1 is inclined, and the utility is strong.

[0087] In one specific embodiment, the holding piece 18 comprises a telescopic pull rod and a handle, one end of the telescopic pull rod is connected with the mounting piece 1, and the other end of the telescopic pull rod is connected with the handle.

[0088] In use, the tester can hold the handle to lengthen the telescopic pull rod, and then cooperate with the mobile piece 17 to move the mounting piece 1 to the pavement to be tested, so that the mounting piece 1 is conveniently and labor-savingly moved; the tester can also pull the handle to incline the mounting piece 1, so that the weight 2 is put into the falling channel 11 from the opening 12.

[0089] Figure 4 The flowchart of the embedded pavement depth testing method provided by the embodiment of the application is shown in the figure. Figure 4 As shown in the figure, based on the embedded pavement depth testing device provided by any of the above embodiments, the application further provides an embedded pavement depth testing method, which comprises the following steps:

[0090] Step S100, coloring in a first color on the pavement to be tested;

[0091] Step S200, placing the mounting piece on the pavement to be tested, so that the opening faces the pavement to be tested, putting the weight into the falling channel of the mounting piece, and making the weight in a first state;

[0092] Step S300, coloring in a second color on the colored surface of the testing block;

[0093] Step S400, controlling the weight to switch to a second state, so that the weight freely falls to drive the colored surface of the testing block to impact the pavement to be tested, and form a dyeing area of the second color on the pavement to be tested;

[0094] Step S500, acquiring an image of the dyeing area of the pavement to be tested;

[0095] Step S600, according to the colored area image, determine the ratio value of the road surface area that the test block bears load when in contact with the road surface to the nominal contact area;

[0096] Step S700, according to the road surface bearing area ratio curve of the colored area of the second color and the ratio value, determine the depth of the test block embedded in the road surface to be tested.

[0097] In this embodiment, first, select a position point on the road surface to be tested for the embedded road surface depth, and set the position point as the road surface to be tested, and color the first color on the road surface to be tested, for example, by spraying thin and uniform paint, and the first color can be white. Then, move the mounting piece 1 to the road surface to be tested, and make the opening 12 face the road surface to be tested; put the weight 2 into the falling channel 11 and make the hook on the rope 41 hook the ring 8, so that the weight 2 is in the first state; pull the rope 41 to drive the weight 2 to rise, and the blocking piece 7 in the third state abuts against the driving connecting piece 6, so that the test block 3 penetrates out of the falling channel 11, at this time, the second color can be colored on the colored surface of the test block 3, which can be colored by applying the coloring agent, and the application of the coloring agent should be thin and uniform, and the second color is different from the first color, for example, the second color is red. After coloring, the blocking piece 7 switches to the fourth state, and the test block 3 returns to the falling channel 11, and the rope 41 can be continuously pulled until the weight 2 moves to the top end of the mounting piece 1 away from the opening 12; after the weight 2 and the test block 3 stop swinging, the rope 41 is loosened, the weight 2 switches to the second state, and the weight 2 freely falls to drive the colored surface of the test block 3 to impact the road surface to be tested; at this time, the part of the colored surface of the test block 3 actually in contact with the road surface to be tested will color the road surface to be tested, forming a colored area of the second color.

[0098] The colored area image of the road surface to be tested is obtained by photographing or other means, and the ratio value of the road surface area that the test block 3 bears load when in contact with the road surface to be tested to the nominal contact area can be obtained, wherein the nominal contact area of the test block 3 and the road surface to be tested is the area surrounded by the outer contour of the colored area of the second color. Finally, according to the road surface bearing area ratio curve of the colored area of the second color and the ratio value, the depth of the test block 3 embedded in the road surface to be tested can be determined, and the depth range of the road surface actually in contact with the test block 3 can be determined, and according to the road surface texture in the depth range in the colored area of the second color, the evaluation index can be obtained, and the anti-skid performance of the road surface to be tested can be evaluated, which solves the defects of inconvenient measurement and large error of evaluation results of the existing technology for judging the anti-skid performance of the road surface.

[0099] In one specific embodiment, the number m of pixel points corresponding to the actually dyed parts in the dyed area of the second color, and the number n of pixel points corresponding to the area surrounded by the outer contour of the dyed area of the second color, can be used to determine the proportion value P of the road surface area that bears the load when the test block 3 is in contact with the road surface under test, to the nominal contact area, wherein P = m / n x 100%.

[0100] Specifically, after completing one test, the dyed area of the second color can be repainted with the first color, and then the test is performed again at the same position; the weight of the weight 2 is changed or the height of the weight 2 in the first state is changed, so as to simulate the interaction between vehicles of different weights and the road surface under test. Through multiple tests, the evaluation of the skid resistance of the road surface under test is more accurate and reliable.

[0101] Specifically, the embedded road surface depth test method further comprises the step of obtaining a road surface bearing area ratio curve of the dyed area of the second color:

[0102] Step S701: Obtain road surface point cloud data of the dyed area of the second color on the road surface under test;

[0103] Step S702: According to the road surface point cloud data of the dyed area of the second color, the cumulative distribution probability of the point cloud at different depths is counted, and the road surface bearing area ratio curve is determined.

[0104] In this embodiment, by obtaining the road surface point cloud data of the dyed area of the second color on the road surface under test, and then counting the cumulative distribution probability of the point cloud at different depths according to the road surface point cloud data of the dyed area of the second color, the distribution probability of the point cloud at different depths reflects the area proportion at different depths in the dyed area of the second color. By counting the cumulative distribution probability of the point cloud at different depths, the relationship between the depth and the area proportion is established, and the road surface bearing area ratio curve is determined.

[0105] As shown in the formula (1), the road surface bearing area ratio curve of the dyed area of the second color is determined by the road surface point cloud data of the dyed area of the second color. Figure 5 As shown in the formula (1), the road surface bearing area ratio curve of the dyed area of the second color is determined by the road surface point cloud data of the dyed area of the second color. Figure 5 The road surface bearing area ratio curve of the dyed area of the second color, wherein the horizontal coordinate in the graph represents the proportion value of the road surface area that bears the load when the test block 3 is in contact with the road surface under test, to the nominal contact area (bearing area ratio), and the vertical coordinate represents the embedded depth of the test block 3. The road surface bearing area ratio curve reflects the distribution of the area that bears the load from the highest point on the surface downward in the dyed area of the second color. By substituting the proportion value of the road surface area that bears the load when the test block 3 is in contact with the road surface under test, to the nominal contact area into the road surface bearing area ratio curve, the embedded depth of the test block 3 can be deduced. For example, when the proportion value is p, the embedded depth is h1; when the proportion value is q, the embedded depth is h2.

[0106] The dyeing area of the second color is an area surrounded by the outer contour of the impact part of the colored surface of the test block 3, and the area of the dyeing area of the second color is equal to the area of the colored surface of the test block 3.

[0107] In one specific embodiment, the road point cloud data of the dyeing area of the second color can be obtained by scanning through a three-dimensional scanner, and the road point cloud data is convenient to obtain and reliable.

[0108] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An embedded pavement depth testing device, characterized by, The embedded pavement depth testing system comprises: a mounting member, which is internally provided with a vertical falling channel, the bottom of the falling channel being provided with an opening; a weight, which is movably arranged in the falling channel, the weight having a first state and a second state, in the first state, the weight is hung in the falling channel away from the opening, in the second state, the weight can freely fall in the falling channel; a test block, which is arranged at the end of the weight facing the opening, the end of the test block facing the opening being provided with a colored surface; the mounting member is provided with at least one opening, the opening is in communication with the falling channel, and the size of the at least one opening is greater than that of the test block; a guide connecting member, which is connected with the weight; the falling channel is internally provided with a guide portion extending in the vertical direction, the end of the guide connecting member extends out of the outer periphery of the weight and is connected with the guide portion, the guide connecting member can slide along the guide portion; the guide portion comprises a guide groove, the end of the guide connecting member extends into the guide groove and abuts against the guide groove, the width of the guide groove gradually decreases from the inner side to the outer side of the falling channel; a lifting assembly, which is arranged on the mounting member and connected with the weight, the lifting assembly is used to drive the weight to move in the falling channel away from the opening.

2. The embedded pavement depth testing device of claim 1, wherein, The guide connecting member is connected with the middle of the end of the weight away from the opening, and the guide connecting member is connected with the lifting assembly; The embedded pavement depth testing system further comprises a driving connecting member and a blocking member, one end of the driving connecting member is connected with the edge of the weight, the other end of the driving connecting member is connected with the end of the guide connecting member away from the weight; the blocking member is arranged on the mounting member and is oppositely arranged with the opening on the mounting member, the size of which is greater than that of the test block, the blocking member has a third state and a fourth state, in the third state, the blocking member extends into the inside of the falling channel, when the weight moves away from the opening, the driving connecting member can abut against the blocking member to drive the weight to rotate, so that the test block passes out of the opening opposite to the blocking member; In the fourth state, the blocking member is located outside the falling channel.

3. The embedded pavement depth testing device of claim 1, wherein, The mounting member comprises a barrel and at least one reinforcing member, one end of the barrel is the opening, the barrel is spliced by at least two plate bodies, and the at least one reinforcing member is sleeved on the circumferential outer side of the barrel.

4. The embedded pavement depth testing device of any one of claims 1-3, wherein, The bottom of the mounting member is provided with a moving member; and / or, the mounting member is provided with a holding member.

5. A method of embedded pavement depth testing based on the embedded pavement depth testing device according to any one of claims 1 to 4, characterized in that, The embedded pavement depth testing method comprises: coloring the to-be-tested pavement with a first color; placing the mounting member on the to-be-tested pavement, so that the opening faces the to-be-tested pavement, and placing the weight into the falling channel of the mounting member, and making the weight in the first state; coloring the colored surface of the test block with a second color; The heavy hammer is switched to a second state, and the heavy hammer is allowed to freely fall to drive the colored surface of the test block to impact the to-be-tested road surface and form a dyed area of the second color on the to-be-tested road surface; An image of the dyed area of the to-be-tested road surface is acquired; According to the image of the dyed area, a proportion value of a road surface area bearing a load when the test block is in contact with the to-be-tested road surface to a nominal contact area is determined; According to the road surface bearing area ratio curve of the dyed area of the second color and the proportion value, a depth of the test block embedded in the to-be-tested road surface is determined.

6. The embedded pavement depth test method of claim 5, wherein, The embedded road surface depth test method further includes a step of acquiring the road surface bearing area ratio curve of the dyed area of the second color, including: Point cloud data of the dyed area of the second color on the to-be-tested road surface is acquired; According to the point cloud data of the dyed area of the second color, a cumulative distribution probability of the point cloud at different depths is counted, and the road surface bearing area ratio curve is determined.

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