Road marking site impact resistance detection device and detection evaluation method

Abstract

The invention discloses a road marking site impact resistance detection device and a detection evaluation method.The road marking site impact resistance detection device comprises a testing device and a measuring device, and the testing device comprises a testing cylinder and an impact part arranged in the testing cylinder; the measuring device comprises a frame body and a measuring head arranged on the frame body, a falling channel is arranged in the testing cylinder, the impact part can fall to a marking measuring point along the falling channel, the frame body is provided with a reference plane, and the measuring head can ascend and descend relative to the frame body. The measuring head can measure the thickness of a marked line and the depth of a pit generated after an impact test. According to the detection and evaluation method, the road marking on-site impact resistance detection device is used for detecting the marking. With the adoption of the method, the entity quality of the marking marked on the road can be detected, quantitative evaluation can be formed, and an important reference can be provided for material optimization and construction guidance.

Description

Technical Field

[0001] The present invention relates to the technical field of road marking detection, and in particular to an on-site impact resistance performance detection device and a detection and evaluation method for road markings. Background Art

[0002] Currently, on-site testing methods for traffic markings primarily focus on the initial performance of newly drawn road markings. Relevant national standards only specify initial indicators such as the marking's appearance, thickness, and slip resistance. However, research on testing tools and evaluation methods for damage resistance is relatively lacking. On the other hand, while there are relatively mature test methods for testing the durability of marking materials, such as wear resistance, water resistance, and alkali resistance, the physical quality of road markings is directly related to construction temperature, pavement surface texture, and cleanliness. Therefore, existing test methods and evaluation indicators cannot fully reflect the physical performance of road markings. There is an urgent need for an on-site testing method that can comprehensively reflect the marking's wear resistance, toughness, and adhesion to the substrate. This is of great significance for optimizing materials and guiding construction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an on-site impact resistance testing device for road markings, which can detect the physical quality of road markings and form a quantitative evaluation, thereby providing an important reference for optimizing materials and guiding construction.

[0004] In order to solve the above technical problems, the present invention provides an on-site impact resistance performance testing device for road markings, which is used to perform impact tests on road markings and measure test results. The device includes a testing device and a measuring device. The testing device includes a test cylinder and an impact member arranged in the test cylinder. The measuring device includes a frame and a measuring head arranged on the frame.

[0005] A falling channel is provided inside the test cylinder, and the impact member can fall along the falling channel to the marking measuring point;

[0006] The frame is provided with a reference plane, and the measuring head can be raised and lowered relative to the frame. The measuring head can measure the thickness of the marking line and the depth of the pit generated after the impact test.

[0007] As an improvement to the above scheme, the test cylinder is in the shape of a straight cylinder, and a through hole is provided on the side of the top of the test cylinder. The test device also includes a blocking piece, which can be inserted into the through hole and whose plane is perpendicular to the length direction of the test cylinder. After the blocking piece is inserted into the through hole, it can cut off the falling channel, and the impact member can be placed on the surface of the blocking piece.

[0008] As an improvement to the above solution, alignment marks are provided on the sides of the bottom of the test cylinder. The alignment marks are respectively provided on both sides of the bottom of the test cylinder. The alignment marks are linear and provided along the length direction of the test cylinder.

[0009] As an improvement to the above-mentioned solution, the impact piece is spherical, and includes a spherical portion and an annular portion. The annular portion is arranged in a circular area in the middle of the spherical portion and is arranged in an annular shape. The outer surface of the annular portion and the outer surface of the spherical portion form a complete spherical surface, and the annular portion is made of soft elastic material.

[0010] As an improvement of the above-mentioned scheme, the impact part includes an impact part and a limiting part, the impact part is located at the bottom of the limiting part and is semicircular, the limiting part is cylindrical, and an annular part is provided in the middle of the impact part. The annular part is arranged in the semicircular area at the bottom of the impact part and forms a complete spherical surface with the outer surface of the impact part, and the annular part is made of soft elastic material.

[0011] As an improvement to the above solution, the outer surface of the annular portion is covered with a honeycomb texture.

[0012] The present invention also provides a method for detecting and evaluating road markings, which uses the above-mentioned on-site impact resistance performance detection device for road markings to perform detection, comprising the following steps:

[0013] Measure the thickness of the marking line using a measuring device;

[0014] Determine the measuring point on the marking line and place the test tube of the test device on the drop point;

[0015] Use an impact piece to perform an impact test on the marking;

[0016] Use a measuring device to measure and record the depth of the pit at the impact point;

[0017] Observe and measure the spalling of cracks;

[0018] Based on the measurement and observation results, the impact resistance of the marking is graded and evaluated.

[0019] As an improvement to the above solution, the step of determining a measuring point on the marking line and placing the test tube of the test device on the measuring point includes:

[0020] Align the alignment marks on both sides of the test cylinder with the edge lines of the marking line, and make the projection of the central axis of the test cylinder lie within the marking line;

[0021] Wherein, the vertical distance between the alignment mark and the central axis of the test cylinder is L, and the value range of L is 10mm-25mm.

[0022] As an improvement to the above solution, the step of performing an impact test on the marking line using an impact piece includes:

[0023] After placing the test cylinder on the drop point, insert the blocking sheet into the through hole, and then place the impact piece into the test cylinder so that the annular portion of the impact piece abuts against the surface of the blocking sheet;

[0024] Then, the blocking sheet in the through hole is pulled out to make the impact member fall down.

[0025] As an improvement to the above solution, the step of performing graded evaluation on the impact resistance of the marking line includes:

[0026] The impact resistance of the marking line is graded and evaluated based on the pit condition, number of cracks, and the peeling of cracks in the pits:

[0027] If the depth of the pit is less than 1 / m of the marking thickness, and there are no cracks in the marking line and the material in the pit is not broken, it is rated as level one performance;

[0028] If the pit depth is less than 1 / m of the marking thickness, and there are 1 to n cracks on the marking line, and the angles of the edges of the material peeling off in the pit are less than k1, it is rated as Class II performance;

[0029] If the depth of the pit is less than 1 / m of the marking thickness, and there are more than n cracks on the marking line, and the angles of the edges of the material peeling off in the pit are less than k2, it is rated as level 3 performance;

[0030] If the depth of the pit is greater than 1 / m of the marking thickness, or the marking material is completely broken, or the angle between the edges of the material peeling off in the pit is greater than k2, it is rated as level 4 performance;

[0031] Among them, 1<m, 0<n<5, 25°<k1<75°, 100°<k2<160°.

[0032] The implementation of the present invention has the following beneficial effects:

[0033] The on-site impact resistance performance testing device for road markings of the present invention includes a testing device and a measuring device, wherein the testing device is used to perform an impact test on on-site road markings, and the measuring device is used to measure the road markings and the results after the impact test. The testing device includes a test cylinder and an impact member disposed within the test cylinder. The test cylinder is provided with a falling channel, and the impact member can fall along the falling channel to a measuring point on the road marking and produce an impact on the measuring point. The measuring device includes a frame and a measuring head disposed on the frame. The measuring head can be raised and lowered relative to the frame. The measuring head can measure the thickness of the road marking and the depth of the pit produced after the impact test, thereby measuring the road marking and the results after the impact, so as to facilitate a quantitative evaluation of the results after the impact test. Therefore, the on-site impact resistance testing device for road markings of the present invention can detect the physical quality of the road markings applied on the road and can form a quantitative evaluation, which can provide an important reference for selecting materials and guiding construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the disassembled structure of the test device of the present invention;

[0035] Figure 2 It is a schematic diagram of the disassembled structure of the measuring device of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the test device of the present invention placed on a marking line;

[0037] Figure 4 1 is a schematic structural diagram of a first embodiment of an impact member of the present invention;

[0038] Figure 5 is a schematic structural diagram of a second embodiment of an impact member of the present invention;

[0039] Figure 6 It is a schematic diagram of the partial disassembly structure of the test device of the present invention;

[0040] Figure 7 Schematic diagram of the cross-sectional structure of the impact member and the blocking piece of the present invention;

[0041] Figure 8 It is a schematic flow chart of the detection and evaluation method of the present invention. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear herein are based solely on the accompanying drawings and are not intended to limit the present invention.

[0043] See also Figure 1 and Figure 2 The present invention discloses a kit for testing the impact resistance of a marking 3, which is used to perform an impact test on the marking 3 and measure the test results. The kit includes a testing device 1 and a measuring device 2. The testing device 1 is used to perform an impact test on the marking 3, and the measuring device 2 is used to measure the marking 3 and the results after the impact test to facilitate quantitative evaluation. The testing device 1 includes a test cylinder 11 and an impact member 12 disposed within the test cylinder 11. The impact member 12 is used to produce a falling impact on the marking 3. The measuring device 2 includes a frame 21 and a measuring head 22 disposed on the frame 21. The measuring head 22 is used to measure the thickness of the marking 3 and the depth of the pit after the impact.

[0044] The test cylinder 11 is provided with a falling channel 111 inside, and the impact piece 12 can fall along the falling channel 111 to the measuring point of the marking line 3. The test cylinder 11 has a limiting effect on the impact piece 12, ensuring that the impact piece 12 can fall along the falling channel 111 to avoid deviation of the impact measuring point. After being released, the impact piece 12 can vertically impact the measuring point of the marking line 3, forming a pit deformation that can be quantified and analyzed. The geometric dimensions of the impact piece 12 match the inner diameter of the falling channel 111, and a certain gap is provided between the inner wall of the test cylinder 11 and the impact piece 12 to ensure that the impact piece 12 is not subject to the friction of the inner wall and falls freely. Compared with the traditional manual release method of lifting the impact piece 12, this embodiment limits the falling trajectory of the impact piece 12 by the test cylinder 11, which can ensure that the impact piece 12 falls at the measuring point of the marking line 3, thereby ensuring the accuracy of subsequent measurements.

[0045] The frame 21 is provided with a reference plane 211, and the measuring head 22 can be raised and lowered relative to the frame 21. The measuring head 22 can measure the thickness of the marking line 3 and the depth of the pit generated after the impact test. The reference plane forms a stable measurement reference with the road surface, so that the displacement of the measuring head 22 during the lifting process can directly reflect the thickness of the marking line 3 and the depth of the pit. The probe end of the measuring head 22 adopts a flat-headed cylindrical design, which automatically locks the reading when it contacts the surface of the marking line 3. During measurement, the operator first fits the reference plane 211 to the road surface. Through the lifting and lowering action of the measuring head 22, the height difference between the marking line 3 and the road surface and the height difference before and after the impact can be obtained respectively, thereby directly calculating the thickness of the marking line 3 and the absolute depth of the pit.

[0046] Compared to existing methods that rely on laboratory equipment to test the properties of road marking material 3, this embodiment uses the test device 1 to simulate actual impact loads, combined with on-site quantitative testing using the measurement device 2, to directly reflect the comprehensive performance of the road marking 3 under real-world road conditions. Traditional testing methods cannot obtain data on the actual road surface performance of the road marking 3. This solution uses simulated impacts, analysis of the correlation between impact deformation depth and thickness changes, and provides a reliable on-site testing method for evaluating the physical impact resistance of the road marking 3.

[0047] The beneficial effects of the embodiments of the present invention are as follows:

[0048] The impact resistance performance testing kit for road marking 3 of the embodiment of the present invention includes a testing device 1 and a measuring device 2, wherein the testing device 1 is used to perform an impact test on the road marking 3, and the measuring device 2 is used to measure the road marking 3 and the results after the impact test. The testing device 1 includes a test cylinder 11 and an impact member 12 disposed in the test cylinder 11. The test cylinder 11 is provided with a falling channel 111. The impact member 12 can fall along the falling channel 111 to the measuring point of the road marking 3 and produce an impact on the measuring point of the road marking 3. The measuring device 2 includes a frame 21 and a measuring head 22 disposed on the frame 21. The measuring head 22 can be raised and lowered relative to the frame 21. The measuring head 22 can measure the thickness of the road marking 3 and the depth of the pit produced after the impact test, thereby measuring the road marking 3 and the results after the impact, so as to facilitate quantitative evaluation of the results after the impact test. Therefore, the impact resistance performance testing kit for road marking 3 of the present invention can detect the physical quality of the road marking 3 applied on the road and can form a quantitative evaluation, which can provide an important reference for selecting materials and guiding construction.

[0049] The test tube 11 is a straight cylinder, with the falling channel 111 extending through it. A perforation 112 is provided on the side of the top of the test tube 11. The test device 1 also includes a blocking piece 13, which can be inserted into the perforation 112 and has a plane perpendicular to the length of the test tube 11. One end of the blocking piece 13 is semicircular and can mate with the inner wall of the test tube 11. Once inserted into the perforation 112, the blocking piece 13 can block the falling channel 111. The impact member 12 can be placed on the surface of the blocking piece 13. The surface of the blocking piece 13 is polished, which not only stably supports the impact member 12 but also reduces horizontal disturbance of the impact member 12 when it is removed, ensuring that the impact member 12 falls freely in the vertical direction.

[0050] Compared with the traditional manual lifting and releasing method of the impact member 12, this embodiment controls the impact timing by plugging and unplugging the blocking piece 13, eliminates the initial position deviation caused by human shaking, and ensures that the impact height is accurately controllable.

[0051] The side of the bottom of the test cylinder 11 is provided with alignment marks 113. The alignment marks 113 are respectively arranged on both sides of the bottom of the test cylinder 11. The alignment marks 113 are linear and arranged along the length of the test cylinder 11. The linear alignment marks 113 symmetrically arranged on both sides of the bottom of the test cylinder 11 extend longitudinally along the cylinder body, forming two visual reference lines parallel to the axis of the falling channel 111. During operation, the two marking lines are visually aligned parallel to the edge of the marking line 3 to achieve precise positioning of the impact point and the edge of the marking line 3. In other embodiments, a laser marking line 3 tool can also be used to locate the edge of the marking line 3.

[0052] See also Figure 1 and Figure 4 In the first embodiment, the impact member 12 is spherical, and the clearance between its outer diameter and the inner wall of the test tube 11 is controlled within the range of 0.5-1.5 mm to ensure that there is no significant deviation during the falling process. The arc bottom of the impact member 12 directly impacts the measuring point of the marking line 3.

[0053] In the first embodiment, the impact member 12 includes a spherical portion 123 and an annular portion 124. The annular portion 124 is arranged in a circular area in the middle of the spherical portion 123 and is arranged in an annular manner. The annular portion 124 is a ring-shaped structure in the middle of the spherical portion 123. The outer surface of the annular portion 124 and the outer surface of the spherical portion 123 form a complete sphere, and the junction between the annular portion 124 and the spherical portion 123 is smooth and seamless. The impact member 12 adopts a composite structure of a spherical portion 123 and an annular portion 124. The annular portion 124 is embedded in the annular area in the middle of the spherical portion 123, forming an annular identification band surrounding the sphere. In addition, the annular portion 124 is made of a soft elastic material. The annular portion 124 of the soft elastic material produces controllable deformation at the moment of impact, which not only maintains the effective transmission of impact energy but also provides a buffer to protect the impact member 12.

[0054] See also Figure 5 In the second embodiment, the impact member 12 includes an impact portion 121 and a limiting portion 122. The impact portion 121 is located at the bottom of the limiting portion 122 and is semicircular in shape. The limiting portion 122 is cylindrical, and the outer wall of the limiting portion 122 is capable of contacting the inner wall of the test tube 11. The cylindrical outer wall of the limiting portion 122 slides in contact with the inner wall of the test tube 11, and the lower edge of the semicircular impact portion 121 protrudes from the bottom surface of the limiting portion 122, concentrating the impact energy on the surface of the marking line 3. Compared to traditional single-form impact bodies, this embodiment, through the replaceable impact member 12 structure, adapts to the different impact contact area requirements of different marking line 3 materials while maintaining vertical drop accuracy.

[0055] In the second embodiment, an annular portion 124 is provided in the middle of the impact portion 121. The annular portion 124 is located in the semicircular region at the bottom of the impact portion 121 and forms a complete spherical surface with the outer surface of the impact portion 121. The annular portion 124 is a semicircular structure in the middle of the bottom of the impact portion 121. The annular portion 124 is embedded in the arc-shaped region at the bottom of the impact portion 121, forming an arc-shaped identification band surrounding the bottom of the semicircular impact portion 121. The junction between the annular portion 124 and the spherical portion 123 is smooth and seamless. The annular portion 124 is made of a soft elastic material. The annular portion 124 is located in the semicircular region at the bottom of the impact portion 121, so that the soft elastic material acts precisely on the impact center point. The annular portion 124 of the soft elastic material undergoes controllable deformation at the moment of impact, thereby maintaining the effective transmission of impact energy and providing a buffer to protect the impact member 12.

[0056] Before placing the impact piece 12, the operator can observe the position of the annular portion 124 and place the annular portion 124 on the blocking piece 13. In this way, when the impact is performed, it can be ensured that the annular portion 124 collides with the performance measuring point, thereby achieving visual calibration of the impact direction, ensuring that the impact force acts on the annular portion 124, forming a buffer for the annular portion 124, and protecting the annular portion 124.

[0057] In the two aforementioned embodiments, the outer surface of the annular portion 124 is covered with a honeycomb texture. The honeycomb texture provided on the outer surface of the annular portion 124 can, on the one hand, disperse the impact load through the hexagonal grid structure, causing the elastic material to produce uniform radial deformation when under pressure, thereby maintaining the buffering function while avoiding permanent deformation caused by localized excessive compression. On the other hand, the topological structure formed by the periodic arrangement of hexagonal units forms a micro-support framework on the surface of the annular portion 124, which can improve the structural strength of the annular portion 124 and reduce cracking.

[0058] Further, see Figure 6 and Figure 7In order to reduce the wear of the blocking piece 13 on the bottom of the impact piece 12 and avoid affecting the impact effect, the blocking piece 13 includes a side portion 131 and a lower bent portion 132. The side portions 131 are respectively arranged on both sides of the lower bent portion 132. The lower bent portion 132 protrudes toward one side and forms an arc shape. The diameter of the lower bent portion 132 is smaller than the diameter of the bottom of the impact piece 12 (the diameter of the sphere or the diameter of the impact portion 121). The lower bent portion 132 and the side portion 131 are respectively arranged on both sides of the lower bent portion 132. The two components 31 are connected by a transition portion 134, which has an outwardly convex arc surface. Because the diameter of the downwardly curved portion 132 is smaller than the diameter of the bottom of the impact member 12, the bottom of the impact member 12 abuts the transition portion 134 rather than the inner arc surface of the downwardly curved portion 132. This results in point-to-point contact between the impact member 12 and the blocking plate 13, rather than point-to-surface contact, which is different from the point-to-surface contact between the impact member 12 and the planar blocking plate 13. This embodiment has a smaller contact area, resulting in lower friction. Furthermore, the impact member 12 does not directly contact the bottom of the impact member 12. When the blocking plate 13 is withdrawn, the bottom of the impact member 12 is not directly abraded, thereby less likely to affect the long-term impact effect.

[0059] The blocking piece 13 is also provided with spacers 133. Multiple spacers 133 are spaced apart and arranged on the inner arc surface of the lower curved portion 132. The shape of the perforation 112 corresponds to the longitudinal cross-sectional shape of the blocking piece 13. After the blocking piece 13 is inserted into the perforation 112, the side of the perforation 112 can abut against the spacers 133, thereby limiting the position of the blocking piece 13. Furthermore, the multiple spacers 133 increase the friction on the surface of the lower curved portion 132, making it easier for the operator to insert or remove the blocking piece 13.

[0060] The measuring device 2 also includes three footings 23, each of which is located at the bottom of the frame 21. The bottom surfaces of two of the footings 23 lie on the same horizontal plane, which serves as the reference plane 211. The three footings 23 at the bottom of the frame 21 are arranged in a triangular pattern, with two footings 23 fixed to the front end of the frame 21 to form a reference line, and the third footing 23 located at the center of the rear end of the frame 21. The contact bottom surfaces of the three footings 23 are ground to form a coplanar reference plane 211. When the frame 21 is placed on the road surface, the reference plane 211 automatically adapts to slight undulations in the road surface, maintaining the elevation trajectory of the measuring head 22 perpendicular to the surface of the marking line 3.

[0061] The measuring device 2 also includes a lifting mechanism 24, which includes a driver 241 and a slider 242 located on the side of the frame 21. The measuring head 22 is movably mounted on the slider 242 and is in transmission connection with the driver 241. The driver 241 can drive the measuring head 22 up and down via the slider 242. The driver 241 can be a component with linear motion characteristics, such as a linear motor, a pneumatic cylinder, or an electric slide. The slider 242 moves vertically along the side of the frame 21, and the measuring head 22 is secured to the slider 242 via a rigid connecting rod. The driver 241 can drive the slider 242 to continuously raise and lower the measuring head 22, with its motion trajectory maintaining an orthogonal relationship with the reference plane 211. Compared to traditional measuring tools that rely on manual pressure on the measuring head, this embodiment achieves controllable displacement of the measuring head 22 through mechanical transmission, ensuring impact-free contact between the measuring head and the surface of the marking line 3 and significantly improving measurement repeatability.

[0062] See also Figure 8 The embodiment of the present invention further discloses a detection and evaluation method, which uses the above-mentioned marking 3 impact resistance performance detection kit for detection, including the following steps:

[0063] S01, using a measuring device 2 to measure the thickness of a marking line 3;

[0064] S02, determine the measuring point on the marking line 3 and place the test tube 11 of the test device 1 on the measuring point;

[0065] S03, performing an impact test on the marking line 3 using the impact piece 12;

[0066] S04, using the measuring device 2 to measure and record the depth of the pit at the impact point;

[0067] S05, observe and measure the peeling of cracks;

[0068] S06, based on the measurement and observation results, grade and evaluate the impact resistance of marking line 3.

[0069] By aligning the reference plane 211 of the measuring device 2 with the road surface, the measuring head 22 descends vertically to the surface of the marking 3 to complete the initial thickness measurement. The three-point support structure automatically eliminates measurement errors caused by minor road surface unevenness. By quickly aligning the alignment mark 113 on the bottom of the test cylinder 11 with the edge of the marking 3, the distance between the impact point and the edge of the marking 3 can be precisely controlled, improving positioning efficiency compared to traditional manual marking methods.

[0070] Before using the impact piece 12 to perform an impact test on the marking line 3, the blocking piece 13 is first inserted into the test tube 11 to form a stable support surface, and then the impact piece 12 is placed. The blocking piece 13 blocks the impact piece 12, and when the impact piece 12 is released, it only needs to be pulled out of the blocking piece 13 to achieve free fall, eliminating the initial velocity interference caused by manually placing the impact piece 12 and ensuring the consistency of the impact kinetic energy.

[0071] After completing the impact test, it is necessary to perform qualitative and quantitative measurements on the test results, wherein the measuring device 2 can complete the quantitative measurement, specifically measuring the depth of the pit at the impact landing point. In addition, an angle measuring tool is required to measure the angle formed by the edges of the two sides of the peeled material in the pit. Combined with the qualitative observation of the number of cracks, a graded evaluation of the impact resistance of the marking line 3 is completed, and a traceable quantitative evaluation report can be formed. Compared with the existing laboratory testing method, the on-site evaluation efficiency is higher and the results have direct engineering application value, filling the technical gap in the on-site rapid evaluation of the construction quality of the marking line 3.

[0072] Specifically, see Figure 3 The steps of determining a measuring point on the marking line 3 and placing the test tube 11 of the test device 1 on the measuring point include:

[0073] Align the alignment marks 113 on both sides of the test cylinder 11 with the edges of the marking line 3, and make the projection of the central axis of the test cylinder 11 lie within the marking line 3;

[0074] The vertical distance between the alignment mark 113 and the central axis of the test tube 11 is L, and the value range of L is 10 mm-25 mm.

[0075] During the test, the impact point should be located near the edge of Line 3. This is the interface between the Line 3 material and the road surface substrate. This area is subject to significant stress concentration and is most susceptible to peeling or cracking due to vehicle pressure, thermal contraction, and other factors in actual use. Impacting this area can sensitively reflect the adhesion and shear resistance of Line 3 to the road surface, providing valuable guidance for construction quality control.

[0076] The vertical distance L between the alignment mark 113 and the central axis of the test tube 11 is set to 10mm-25mm. During operation, the two marking lines are aligned parallel to the edge of the marking line 3 to ensure that the projection of the central axis is within the effective area of ​​the marking line 3. This distance range has been verified in engineering to cover the requirements for edge weak zone detection of common marking line 3 widths (100mm-250mm), while also preventing the impact point from deviating from the effective detection area due to an excessively large L value.

[0077] The step of performing an impact test on the marking line 3 using the impact member 12 includes:

[0078] After placing the test tube 11 on the drop point, insert the blocking piece 13 into the through hole 112 , and then place the impact piece 12 into the test tube 11 so that the annular portion 124 of the impact piece 12 abuts against the surface of the blocking piece 13 ;

[0079] Then, the blocking sheet 13 in the through hole 112 is pulled out to make the impact member 12 fall down.

[0080] In one embodiment, the blocking piece 13 includes a side portion 131 and a downwardly curved portion 132. The downwardly curved portion 132 protrudes toward one side and forms an arc shape. The diameter of the downwardly curved portion 132 is smaller than the diameter of the bottom of the impact member 12. The contact between the impact member 12 and the blocking piece 13 is point-to-point contact, rather than point-to-surface contact, resulting in a smaller contact area and lower friction. This ensures that the impact member 12 does not slide or deviate after placement. Under the limiting action of the perforation 112, the blocking piece 13 is withdrawn in a unidirectional, linear motion, preventing lateral shaking from interfering with the initial falling posture of the impact member 12.

[0081] The step of performing graded evaluation on the impact resistance of the marking line 3 comprises:

[0082] The impact resistance of marking line 3 is graded and evaluated based on the pit condition, number of cracks and the peeling of cracks in the pits:

[0083] If the depth of the pit is less than 1 / m of the thickness of the marking line 3, and there are no cracks in the marking line 3, and the material in the pit is not broken, it is rated as level one performance;

[0084] If the depth of the pit is less than 1 / m of the thickness of the marking line 3, and there are 1 to n cracks on the marking line 3, and the angles of the edges of the material peeling off in the pit are less than k1, it is rated as Class II performance;

[0085] If the depth of the pit is less than 1 / m of the thickness of the marking line 3, and there are more than n cracks on the marking line 3, and the angles of the edges of the material peeling off in the pit are less than k2, it is rated as level 3 performance;

[0086] If the depth of the pit is greater than 1 / m of the thickness of the marking line 3, or the marking line 3 material is completely broken, or the angles of the edges of the material peeling off in the pit are greater than k2, it is rated as level 4 performance;

[0087] Among them, 1<m, 0<n<5, 25°<k1<75°, 100°<k2<160°.

[0088] The depth of the pit reflects the crush resistance of the marking material and can be adjusted to accommodate markings of varying thicknesses by varying the m value. The number of cracks indicates material toughness; the more cracks, the lower the toughness. The angle of the peeling indicates the state of the interfacial bonding; the larger the angle, the lower the surface shear strength.

[0089] In the grading evaluation step, the ratio of the pit depth to the thickness of the marking line 3 is obtained by the measuring device 2, the number of cracks is observed visually or with a magnifying glass, and the peeling angle is quantified using a transparent angle measurement template. When the pit depth is less than 1 / m of the thickness of the marking line 3 (for example, 50% thickness when m=2), there are no cracks and the material is intact, the marking line 3 is judged to have both excellent wear resistance and interface adhesion, and meets the first-level performance; if there are 1 to n cracks (such as n=3) and the peeling angle is less than k1 (such as 60°), it indicates that the marking line 3 has insufficient toughness but no structural damage has occurred, and is rated as second level; when there are more than n cracks or the peeling angle reaches k2 (such as 120°), it reflects that the marking material is significantly brittle or the interface adhesion is deteriorated, and is classified as third level; if the pit depth exceeds the threshold, the material is broken or the peeling angle is greater than k2, it is directly judged as fourth level unqualified.

[0090] Compared to existing grading methods that rely solely on pit depth, this approach incorporates a multi-dimensional evaluation based on crack count and peeling angle. This allows for differentiation of marking failure modes (such as ductile fracture and interfacial delamination) and precise identification of material performance weaknesses. Hidden damage, such as the tendency for microcracks to propagate, that is undetectable with traditional methods, can be quantified and characterized through crack count, providing direct data support for optimizing marking material mixes and construction techniques.

[0091] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A road marking on-site impact resistance testing device for testing road markings, used for impact testing and measuring test results, characterized in that: The test device comprises a test cylinder and an impact member disposed in the test cylinder, and the measuring device comprises a frame and a measuring head disposed on the frame. A falling channel is provided inside the test cylinder, and the impact member can fall along the falling channel to the marking measuring point; The frame is provided with a reference plane, and the measuring head can be raised and lowered relative to the frame. The measuring head can measure the thickness of the marking line and the depth of the pit generated after the impact test.

2. The on-site impact resistance testing device for road markings according to claim 1, characterized in that: The test cylinder is in the shape of a straight cylinder, and a through-hole is provided on the side of the top of the test cylinder. The test device also includes a blocking piece, which can be inserted into the through-hole and whose plane is perpendicular to the length direction of the test cylinder. After the blocking piece is inserted into the through-hole, it can cut off the falling channel, and the impact member can be placed on the surface of the blocking piece.

3. The on-site impact resistance testing device for road markings according to claim 1, characterized in that: Alignment marks are provided on the sides of the bottom of the test cylinder. The alignment marks are respectively arranged on both sides of the bottom of the test cylinder. The alignment marks are linear and arranged along the length direction of the test cylinder.

4. The on-site impact resistance testing device for road markings according to claim 1, characterized in that: The impact piece is spherical and includes a spherical portion and an annular portion. The annular portion is arranged in a circular area in the middle of the spherical portion and is arranged in an annular shape. The outer surface of the annular portion and the outer surface of the spherical portion form a complete spherical surface. The annular portion is made of soft elastic material.

5. The on-site impact resistance testing device for road markings according to claim 1, characterized in that: The impact member includes an impact portion and a limiting portion, wherein the impact portion is located at the bottom of the limiting portion and is semicircular, the limiting portion is cylindrical, and an annular portion is provided in the middle of the impact portion. The annular portion is provided in the semicircular area at the bottom of the impact portion and forms a complete spherical surface with the outer surface of the impact portion, and the annular portion is made of soft elastic material.

6. The on-site impact resistance testing device for road markings according to claim 4 or 5, characterized in that: The outer surface of the annular portion is covered with a honeycomb texture.

7. A method for detecting and evaluating road markings, characterized in that: The method of using the on-site impact resistance testing device for road markings according to any one of claims 1 to 6 to perform testing comprises the following steps: Measure the thickness of the marking line using a measuring device; Determine the measuring point on the marking line and place the test tube of the test device on the drop point; Use an impact piece to perform an impact test on the marking line; Use a measuring device to measure and record the depth of the pit at the impact point; Observe and measure the spalling of cracks; Based on the measurement and observation results, the impact resistance of the marking is graded and evaluated.

8. The method for detecting and evaluating road markings according to claim 7, wherein: The steps of determining a measuring point on the marking line and placing a test tube of the test device on the measuring point include: Align the alignment marks on both sides of the test cylinder with the edge lines of the marking line, and make the projection of the central axis of the test cylinder lie within the marking line; Wherein, the vertical distance between the alignment mark and the central axis of the test cylinder is L, and the value range of L is 10mm-25mm.

9. The method for detecting and evaluating road markings according to claim 7, wherein: The step of performing an impact test on the marking line using the impact piece comprises: After placing the test cylinder on the drop point, insert the blocking sheet into the through hole, and then place the impact piece into the test cylinder so that the annular portion of the impact piece abuts against the surface of the blocking sheet; Then, the blocking sheet in the through hole is pulled out to make the impact member fall down.

10. The method for detecting and evaluating road markings according to claim 7, wherein: The step of performing graded evaluation on the impact resistance of the marking comprises: The impact resistance of the marking line is graded and evaluated based on the pit condition, number of cracks, and the peeling of cracks in the pits: If the depth of the pit is less than 1 / m of the marking thickness, and there are no cracks in the marking line and the material in the pit is not broken, it is rated as level one performance; If the pit depth is less than 1 / m of the marking thickness, and there are 1 to n cracks on the marking line, and the angles of the edges of the material peeling off in the pit are less than k1, it is rated as Class II performance; If the depth of the pit is less than 1 / m of the marking thickness, and there are more than n cracks on the marking line, and the angles of the edges of the material peeling off in the pit are less than k2, it is rated as level 3 performance; If the depth of the pit is greater than 1 / m of the marking thickness, or the marking material is completely broken, or the angle between the edges of the material peeling off in the pit is greater than k2, it is rated as level 4 performance; Among them, 1<m, 0<n<5, 25°<k1<75°, 100°<k2<160°.

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