A device for measuring the thickness of a highway pavement marking

Abstract

The application provides a highway pavement marking thickness measuring device and relates to the technical field of highway marking measurement. The device comprises an electronic display, a control unit, a reference table, a measuring assembly for measuring the marking thickness, a switching assembly provided with a plurality of air outlets, and a self-cleaning and resetting device for ensuring long-term stable operation of the device. The device can complete precise routine measurement during use, identify data anomalies through intelligent algorithms, and start the measuring unit for review, thereby maximizing the efficiency of the measurement work, the reliability of the data, and the safety and durability of the device itself.

Description

Technical Field

[0001] This invention relates to the field of highway marking measurement technology, specifically a highway pavement marking thickness measuring device. Background Technology

[0002] Road markings are important facilities for ensuring traffic safety, guiding traffic flow, and conveying traffic rules. Their thickness is a key technical indicator for measuring the quality of marking projects, directly affecting the durability, reflectivity, dirt resistance, and driving safety of the markings. Markings with insufficient thickness will wear out too quickly, leading to blurring and failure, shortening the maintenance cycle, and increasing long-term costs.

[0003] Chinese invention patent application CN116538932A relates to the field of road marking detection technology, specifically a handheld marking detection device. It includes a housing placed on a reference surface, with a main control chip inside. The main control chip is electrically connected to a wireless communication module, a thickness sensor, and a width sensor. The laser emitted by the thickness sensor is perpendicular to the reference surface, while the laser emitted by the width sensor is parallel to the reference surface. It also includes a baffle for reflecting the laser beam from the width sensor. This invention performs non-contact measurement using the thickness and width sensors. However, this detection device has low accuracy and poor detection performance.

[0004] The above technical solution has a single function. During use, it can only measure the thickness of flat markings. When faced with severely damaged markings, the measuring needle is easy to get stuck in the gaps of the markings, making it unable to return to its original working state. Moreover, pulling it out manually will cause irreversible damage to the device.

[0005] Meanwhile, during the measurement process, the measuring device can only measure ordinary road markings and cannot measure road markings of different shapes. That is, the probe can only perform point measurements on the road markings. If the road marking to be measured is a circular marking, or if there is damage or depression at the measurement location, the point measurement of the probe cannot accurately measure the thickness of the marking.

[0006] Furthermore, as road conditions change, for example, there may be small gravel or debris on the road markings that cannot be cleaned in time, leading to inaccurate measurement results. After the measurement is completed, the measurement location needs to be cleaned to avoid affecting subsequent measurements.

[0007] Therefore, it is necessary to develop a measuring device that is clean, efficient, repositionable, widely applicable, and easy to operate, enabling rapid and large-area detection of marking thickness. Summary of the Invention

[0008] The purpose of this invention is to provide a device for measuring the thickness of road surface markings, aiming to solve the problems in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a highway pavement marking thickness measuring device, comprising:

[0010] An electronic display is used to show the device's operating status, measurement results, and parameter settings.

[0011] The control unit, located below the electronic display, is used to control the vertical movement of the device;

[0012] A horizontal frame, located below the control unit, is used to support the equipment and has a sliding groove for adjusting the horizontal position of the device.

[0013] The reference platform is symmetrically arranged below the horizontal frame and placed on both sides of the road markings for reference positioning of the device;

[0014] A measuring component, located inside the leveling frame, is used to measure the thickness of the markings;

[0015] The measuring component includes a measuring needle and a measuring ring. When measuring the thickness of the marking, if the marking is damaged, the measuring component switches between the measuring needle and the measuring ring.

[0016] The switching assembly includes a flow guide housing with multiple sets of air outlets for switching and resetting the measuring needle and measuring ring.

[0017] Preferably, the measuring component further includes:

[0018] The lower end of the outer casing is used to provide support;

[0019] The movable lever, located at the lower end of the control unit, provides power for the up-and-down movement of the measuring needle and measuring ring.

[0020] A movable plate is located at the lower end of the movable rod;

[0021] A movable component is located at the lower end of the movable plate, and its diameter is the same as that of the movable plate.

[0022] The sliding rod is concentrically positioned at the lower end of the moving plate;

[0023] A connecting plate, located on the outside of the moving part, is used to connect the measuring ring.

[0024] Preferably, the measuring component further includes:

[0025] The support and buffer section has one end located at the lower end of the slide bar and the other end located at the upper end of the measuring needle.

[0026] The connecting buffer section has one end located at the lower end of the connecting plate and the other end located at the upper end of the measuring ring.

[0027] The limiting buffer part has one end located at the upper end of the connecting plate and the other end located at the inner top of the outer shell.

[0028] Preferably, the measuring component further includes:

[0029] The first slide is located inside the side wall of the moving part;

[0030] The slider is sealed inside the first slide rail, forming a closed cavity with the first slide rail;

[0031] The second slide rail, located inside the side wall of the connecting plate, is used to provide limiting and guiding for the slider;

[0032] The reset part has one end connected to the slider and the other end connected to the first slide rail.

[0033] Preferably, the switching component further includes:

[0034] An air pump, located inside the housing, is used for air input;

[0035] A cavity, which is located inside the moving part, is used for air transmission, and the upper end of the cavity is connected to the closed cavity;

[0036] The air supply channel has one end connected to the output end of the air pump and the other end connected to the cavity, which transmits air from the air pump to the cavity.

[0037] A sliding ring is located at the lower end of the moving part, and its interior is connected to the bottom of the cavity.

[0038] Preferably, the switching component further includes:

[0039] The exhaust vent is located on the inner and outer rings of the sliding ring and is matched with different air outlets;

[0040] An elastic baffle, located on the outside of the measuring needle, is used to guide the airflow.

[0041] A conical baffle, located inside the flow guide shell, works in conjunction with an elastic baffle to form a sealed space, providing power for the repositioning of the measuring needle.

[0042] The sliding cavity, located inside the guide shell, is used to limit and guide the sliding of the sliding ring.

[0043] Preferably, the switching component further includes:

[0044] The air blower on the surface is set at an angle upward on the outer ring side wall of the guide shell, and can be used in conjunction with the exhaust port to clean the surface of the measuring ring;

[0045] The air inlet is positioned diagonally downwards on the outer sidewall of the guide shell and is used to clean the road surface below the measuring ring.

[0046] The air outlet is positioned at an angle upward on the inner side wall of the guide shell, and is used to clean the surface of the measuring needle when the measuring needle descends to measure the thickness of the mark.

[0047] The air outlet is positioned diagonally downwards on the inner side wall of the guide shell. It is used to clean the road surface below the measuring needle when the measuring needle descends to measure the thickness of the marking.

[0048] Preferably, the electronic display is an automated control system that simultaneously records and displays the movement distance of the measuring needle and the measuring ring. It works in conjunction with the control unit. When the measurement data of the measuring needle differs significantly from the previously measured data, a signal is transmitted to the control unit to activate the measuring ring for detection. The measuring ring has a modular structure with multiple measuring needles evenly arranged on it. The length and spacing of the measuring needles can be adjusted according to actual detection requirements.

[0049] Preferably, both the conical baffle and the elastic baffle are made of elastic materials, and a sealed cavity can be formed between the conical baffle, the elastic baffle and the flow guide shell.

[0050] The beneficial effects of this invention are:

[0051] 1. The device innovatively integrates two modes: "point" measurement (measuring needle) and "area" measurement (measuring ring). The measuring needle can accurately penetrate the road marking to obtain the absolute thickness value of a single point with extremely high precision. This effectively avoids errors caused by local defects, thereby ensuring the representativeness and authenticity of the final recorded data. At the same time, this switching method allows the device to adapt to road markings of different shapes, increasing its applicability.

[0052] 2. By switching components such as the wind structure, sliding ring, and guide shell, this device can adapt to different road conditions. In the event of damaged road markings or complex environmental conditions, the device can adjust according to real-time data changes to ensure efficient and accurate measurements under various road conditions. In particular, when the measuring needle is stuck, the wind-driven reverse thrust mechanism effectively pushes the measuring needle back to normal operation, solving the measurement failure problem caused by jamming in traditional measurement methods.

[0053] 3. The device is equipped with an advanced intelligent control system. Through the close cooperation between the electronic display and the control unit, it can monitor the working status of the equipment in real time and automatically correct when the detection data is abnormal. When the system detects abnormal data of the measuring needle, it automatically starts the measuring loop for re-detection to ensure that the equipment always keeps in the best working condition. In addition, the device can accurately record and display the movement distance of the measuring needle and the difference from the last measurement, providing users with detailed and comprehensive detection data to facilitate subsequent analysis and evaluation. Attached Figure Description

[0054] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0055] Figure 2 This is a three-dimensional structural diagram of the present invention for use with ordinary road markings and circular road markings;

[0056] Figure 3 This is a bottom-view three-dimensional structural diagram of the present invention;

[0057] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0058] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the measuring component of the present invention;

[0059] Figure 6 This is the invention Figure 5 A magnified view of a portion of region A in the middle;

[0060] Figure 7 This is a front sectional view of the present invention;

[0061] Figure 8 This is the invention Figure 7 A magnified view of a portion of region B in the middle;

[0062] Figure 9 This is a schematic diagram of the left-side cross-sectional structure of the present invention;

[0063] Figure 10 This is the invention Figure 9 A magnified view of a portion of region C.

[0064] In the diagram: 1. Electronic display; 2. Horizontal frame; 3. Reference platform; 4. Control unit; 5. Slide rail; 6. Measuring assembly; 601. Moving rod; 602. Moving plate; 603. Moving part; 604. Connecting plate; 605. Connecting buffer; 606. Measuring ring; 607. Support buffer; 608. Measuring needle; 609. Housing; 6010. Slide rod; 6011. Limiting buffer; 6012. First slide rail; 6013. Slider; 601 4. Second slide rail; 6015. Enclosed cavity; 6016. Fixing rod; 6017. Reset part; 7. Switching assembly; 701. Air pump; 702. Air supply channel; 703. Cavity; 704. Sliding ring; 705. Exhaust port; 706. Conical baffle; 707. Elastic baffle; 708. Guide shell; 709. Top air outlet; 7010. Bottom air outlet; 7011. Top air outlet; 7012. Bottom air outlet; 7013. Slide cavity. Detailed Implementation

[0065] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0066] like Figures 1-10 As shown, a highway pavement marking thickness measuring device includes: an electronic display 1 for displaying the device's working status, measurement results, and parameter settings; a control unit 4 located below the electronic display 1 for controlling the vertical movement of the device to ensure normal measurement; a horizontal frame 2 located below the control unit 4 for providing stable support to ensure the entire system is placed horizontally, and equipped with a sliding groove 5 for adjusting the horizontal position of the device; and a reference platform 3 symmetrically located below the horizontal frame 2 and placed on both sides of the highway marking for reference positioning of the device to ensure accurate positioning of each component during measurement.

[0067] The measuring component 6, housed inside the horizontal frame 2, is used to measure the thickness of road markings. It includes a measuring needle 608 and a measuring ring 606. During the measurement process, if the road marking is severely damaged, the measuring component 6 can promptly switch between the measuring needle 608 and the measuring ring 606, simultaneously collecting data and providing real-time feedback. This switching between "point" measurement (measuring needle 608) and "area" measurement (measuring ring 606) allows the device to measure different road markings (such as...). Figure 2 (a) the ordinary markings and b) the circular markings, that is, the bottom measuring area of ​​the measuring ring 606 is larger than the bottom measuring area of ​​the measuring needle 608; the switching component 7 includes a flow guide shell 708, the top of which is fixedly installed inside the outer shell 609 by a fixing rod 6016, that is, the positions of the flow guide shell 708 and the outer shell 609 do not change, and multiple sets of air outlets are provided on it for switching and resetting the measuring needle 608 and the measuring ring 606 to ensure long-term stable operation of the equipment.

[0068] The measuring assembly 6 also includes: a housing 609, which is fixedly mounted at the lower end of the horizontal frame 2 to provide stable support; a moving rod 601, which is mounted at the lower end of the control unit 4 and moves up and down along the slide groove 5 under the drive of the control unit 4 to provide power for the measuring needle 608 and the measuring ring 606; a moving plate 602, which is mounted at the lower end of the moving rod 601 to provide a stable plane; a moving part 603, which is mounted at the lower end of the moving plate 602 and has the same diameter as the moving plate 602; and a sliding rod 6010, which is concentrically mounted at the lower end of the moving plate 602.

[0069] The measuring assembly 6 further includes: a connecting plate 604 disposed on the outside of the moving member 603 for stabilizing the measuring ring 606; a fixing rod 6016 passing through and slidably connected to the connecting plate 604; a supporting buffer 607, one end of which is disposed at the lower end of the sliding rod 6010 and the other end of which is disposed at the upper end of the measuring needle 608, buffering the force caused by the downward movement of the moving rod 601 when the measuring needle 608 contacts the ground; and a connecting buffer 605, one end of which is disposed at the lower end of the connecting plate 604 and the other end of which is disposed at the upper end of the measuring ring 606. At the upper end, when the measuring ring 606 contacts the ground, it buffers the force caused by the downward movement of the connecting plate 604; the limiting buffer part 6011, one end of which is located at the upper end of the connecting plate 604 and the other end is located at the inner top of the outer shell 609, is used to reset the measuring ring 606 and provide tension; the supporting buffer part 607, the connecting buffer part 605 and the limiting buffer part 6011 adopt an elastic structure, such as a spring, which has elasticity and achieves an elastic reset effect.

[0070] The measuring component 6 further includes: a first slide rail 6012, which is disposed inside the side wall of the moving member 603; a slider 6013, which is sealed inside the first slide rail 6012, forming a closed cavity 6015 with the first slide rail 6012; a second slide rail 6014, which is disposed inside the side wall of the connecting plate 604, for providing limit and guidance for the slider 6013; and a reset part 6017, one end of which is connected to the slider 6013 and the other end is connected to the first slide rail 6012. Therefore, when the air pressure inside the closed cavity 6015 increases, it drives the slider 6013 to move into the second slide rail 6014 and locks the connecting plate 604 in place. Thus, when the moving member 603 moves, it synchronously drives the connecting plate 604 to move, realizing the switching between "point" measurement (measuring needle 608) and "surface" measurement (measuring ring 606).

[0071] The switching component 7 also includes: an air pump 701, which is located inside the housing 609. The air pump 701 is a high-pressure blower used for air input. The air pump 701 starts and continuously outputs gas; a cavity 703, which is located inside the moving part 603 and used for air transmission. The upper end of the cavity 703 is connected to the closed cavity 6015; an air supply channel 702, one end of which is connected to the output end of the air pump 701 and the other end of which is connected to the cavity 703, to transmit air from the air pump 701 to the cavity 703; and a sliding ring 704, which is located at the lower end of the moving part 603 and is connected to the cavity 703 inside, for air storage and transmission.

[0072] The switching component 7 also includes: an exhaust port 705, which is disposed on the inner and outer rings of the sliding ring 704 and cooperates with different air outlets. Air inside the cavity 703 enters the sliding ring 704 and is eventually discharged through multiple exhaust ports 705; an elastic baffle 707, which is disposed on the outside of the measuring needle 608 and is used to effectively guide the airflow. The elastic baffle 707 moves up and down with the measuring needle 608; and a conical baffle 706, which is disposed on the inside of the guide shell 708 and is used in conjunction with the elastic baffle 707 to form a sealed space for the measuring needle 608. The reset is powered by continuously supplying air between the elastic baffle 707 and the conical baffle 706 when the measuring needle 608 is inside the conical baffle 706. This increases the internal pressure and causes the elastic baffle 707 to move upward. The elastic baffle 707 then moves the measuring needle 608 upward to reset, thus allowing the measuring needle 608 to be pulled out. The sliding cavity 7013, located inside the guide shell 708, is used to limit and guide the sliding of the sliding ring 704. Therefore, the sliding ring 704 can move stably up and down inside the sliding cavity 7013.

[0073] The switching component 7 also includes: a surface air outlet 709, which is obliquely upwardly disposed on the outer ring sidewall of the guide shell 708, and can be used in conjunction with the exhaust outlet 705 to clean the surface of the measuring ring 606; when the exhaust outlet 705 coincides with the surface air outlet 709, the air inside the sliding ring 704 is discharged along the exhaust outlet 705 and the surface air outlet 709 to pre-clean the bottom of the measuring ring 606; and a surface air outlet 7010, which is obliquely downwardly disposed on the outer ring sidewall of the guide shell 708, and is used to clean the road surface below the measuring ring 606; when the exhaust outlet 705 coincides with the surface air outlet 7010, the air inside the sliding ring 704 is discharged along the exhaust outlet 705 and the surface air outlet 7010 to clean the road surface below the measuring ring 606.

[0074] The upward-pointing air outlet 7011, obliquely positioned on the inner ring sidewall of the guide shell 708, is used to clean the surface of the measuring needle 608 when it descends to measure the thickness of the mark. When the exhaust outlet 705 coincides with the upward-pointing air outlet 7011, the air inside the sliding ring 704 is discharged along the exhaust outlet 705 and the upward-pointing air outlet 7011, providing a pre-cleaning airflow to the bottom of the measuring needle 608. The downward-pointing air outlet 7012, obliquely positioned on the inner ring sidewall of the guide shell 708, is used to clean the surface of the measuring needle 608 when it descends to measure the thickness of the mark. When the line is used for thickness measurement, the road surface below the measuring needle 608 is cleaned. When the exhaust port 705 coincides with the point-down air blowing port 7012, the air inside the sliding ring 704 is discharged along the exhaust port 705 and the point-down air blowing port 7012 and cleans the road surface below the measuring needle 608. The height of the air inlet of the point-down air blowing port 7012 is higher than the height of the air inlet of the surface air blowing port 709. The slope of the point-down air blowing port 7012 is larger, so that the air blowing point of the point-down air blowing port 7012 is at the same height as the surface air blowing port 709.

[0075] The electronic display 1 is an automated control system that simultaneously records and displays the movement distance of the measuring needle 608 and the measuring ring 606. It works in conjunction with the control unit 4. When the measurement data of the measuring needle 608 differs significantly from the previously measured data, it transmits a signal to the control unit 4 to activate the measuring ring 606 for detection. The measuring ring 606 has a modular structure, on which multiple measuring needles 608, evenly arranged, are made of hard alloy material. The length and spacing of the measuring needles 608 can be adjusted according to actual detection requirements.

[0076] Both the conical baffle 706 and the elastic baffle 707 are made of elastic materials, and the friction between them and the measuring needle 608 is negligible. When the measuring needle 608 descends a large height and gets stuck in the road surface gap, a sealed cavity is formed between the conical baffle 706, the elastic baffle 707 and the guide shell 708. Ventilation into the cavity can increase the pressure for the resetting of the measuring needle 608.

[0077] When in use, the operator moves the device to the road marking to be measured, levels the entire system using the leveling frame 2, and ensures that the reference platform 3 is stably placed on the road surface on both sides of the marking to provide an accurate reference plane for measurement. After setting the measurement parameters through the electronic display 1, the device is started.

[0078] During normal measurement, the device monitoring unit works continuously, and the electronic display 1 continuously displays the distance between the measuring needle 608 and the measuring ring 606 and the reference surface on the reference platform 3. After the measuring needle 608 completes a measurement, the control unit 4 compares the thickness data of this measurement with the average value of the previous five consecutive measurements.

[0079] At this time, the height of the measuring needle 608 is slightly higher than the air outlet 7011 at the point, and the height of the measuring ring 606 is slightly higher than the air outlet 709 on the surface. All components are in their initial positions.

[0080] Once the preparations are complete, the thickness of the marking line is measured. The control unit 4 commands the moving rod 601 to move downwards. The moving rod 601 acts as the main drive shaft, driving the moving plate 602, moving part 603, slide rod 6010 and the measuring needle 608 at the end to descend at a uniform speed. At this time, the moving part 603 is slidably connected to the connecting plate 604, and the slider 6013 retracts inside the first slide rail 6012 under the action of the reset unit 6017, while the connecting plate 604 remains stationary.

[0081] During the descent, when the exhaust vent 705 coincides with the point-up air outlet 7011, the air pump 701 begins to exhaust air, which is ultimately discharged through the point-up air outlet 7011, pre-cleaning the surface of the measuring needle 608. As the moving rod 601 continues to descend, the exhaust vent 705 coincides with the point-down air outlet 7012, and the high-pressure airflow discharged by the air pump 701 is discharged through the point-down air outlet 7012, cleaning the dust and gravel on the surface of the road marking below the measuring needle 608. Finally, the measuring needle 608 contacts the road marking surface, at which point the moving rod 601... 1. After descending a certain distance, the measuring needle 608 makes close contact with the road marking. The downward trend of the moving rod 601 will be subject to the reaction force from the ground. This force is transmitted through the measuring needle 608 to the slide rod 6010 and compresses the support buffer 607. The elastic deformation of the support buffer 607 effectively absorbs this impact energy and prevents the instantaneous rigid collision from damaging the precision measuring needle 608 and the internal structure of the equipment. At this time, the thickness of the marking is recorded. After the single-point measurement is completed, the control unit 4 controls the moving rod 601 to rise and return to the initial position.

[0082] During the ascent, the air pump 701 restarts. When the exhaust port 705 coincides with the point-blowing port 7011, the air pump 701 begins to exhaust air outward, which is finally discharged through the point-blowing port 7011. This airflow acts directly on the surface of the measuring needle 608, thoroughly blowing away any marking paint debris, oil stains, etc. that may have adhered to it during the measurement process, ensuring the cleanliness of the needle tip for the next measurement and maintaining the accuracy of the measurement. The above process is repeated to achieve continuous and automated measurement.

[0083] After the measuring needle 608 completes the measurement, the control unit 4 will compare the thickness data of this measurement with the average value of the previous five consecutive measurements. If a significant deviation is found between the current data and the historical average value, for example, if the deviation exceeds the preset 20% threshold, the electronic display 1 will prompt "data abnormal, start verification". This deviation usually means that the mark at that point may have serious damage, holes or extremely uneven thickness. At this time, the downward displacement of the measuring needle 608 is greater than the normal value.

[0084] At this time, the automatic switch to the measuring ring 606 for verification is initiated. The control unit 4 controls the moving rod 601 to descend again. The descent of the moving rod 601 causes the sliding ring 704 to move between the surface air outlet 709 and the point air outlet 7012. The exhaust outlet 705 does not coincide with any air outlet. At this time, the first slide rail 6012 and the second slide rail 6014 coincide. The air pump 701 begins to exhaust air outward, which is eventually discharged into the closed cavity 6015. The pressure in the closed cavity 6015 increases, pushing the slider 6013 to slide from the first slide rail 6012 into the second slide rail 6014. The slider 6013 helps to insert and limit the moving part 603 and the connecting plate 604. At this time, the moving part 603 and the connecting plate 604 have the same movement state.

[0085] Control unit 4 controls the moving rod 601 to continue descending. The descending moving part 603 drives the connecting plate 604 to descend, transmitting force to the connecting buffer part 605 through the connecting plate 604, ultimately pushing the measuring ring 606 downward. During the descent, when the exhaust port 705 coincides with the surface air blowing port 709, the air pump 701 begins to exhaust air outward, which is finally discharged through the surface air blowing port 709, cleaning the surface of the measuring ring 606. As the moving rod 601 continues to descend, the exhaust port 705 coincides with the under-surface air blowing port 7010, and the air pump 701 exhausts air outward, which is finally discharged through the under-surface air blowing port 7010, cleaning the dust and gravel on the surface of the markings below the measuring ring 606; finally... When the measuring ring 606 contacts the road marking surface, the moving rod 601 moves down a certain distance again, making the measuring ring 606 in close contact with the road marking. The downward trend of the moving rod 601 will be subject to the reaction force from the ground. This force is transmitted through the measuring ring 606 to the connecting buffer 605. The elastic deformation of the connecting buffer 605 effectively absorbs this impact energy, preventing instantaneous rigid collision from damaging the precision measuring ring 606 and the internal structure of the equipment. At this time, the thickness of the marking is recorded, and the average thickness value of this area is calculated. After the measuring ring 606 completes the measurement, the control unit 4 controls the moving rod 601 to rise, driving the measuring needle 608 and the measuring ring 606 back to the initial position.

[0086] During the ascent, the air pump 701 restarts. When the exhaust port 705 coincides with the point air outlet 7011 and the surface air outlet 709 in sequence, the air pump 701 begins to exhaust air outward. The air is finally discharged through the point air outlet 7011 and the surface air outlet 709. This airflow directly acts on the surface of the measuring needle 608 and the measuring ring 606, thoroughly blowing away any marking paint debris, oil stains, etc. that may have adhered to them during the measurement process. This ensures the cleanliness of the device for the next measurement and maintains the accuracy of the measurement. The above process is repeated.

[0087] The measuring ring 606 is a large-area plane that descends smoothly and presses against the surface of the marking at the abnormal point. Due to its large contact area, it measures the average thickness of a small area at that point, rather than the absolute thickness of a single point measured by the measuring needle 608. The control unit 4 intelligently compares the "point" data of the measuring needle 608 with the average "surface" data of the measuring ring 606. If the two data are similar, it indicates that the marking at that point is indeed generally too thin or too thick, confirming the validity of the abnormal data. The device records the verified data. If the data of the measuring ring 606 is normal but the data of the measuring needle 608 is abnormal, it indicates that the point is just a small hole or defect into which the measuring needle 608 is inserted. The device adopts the data of the measuring ring 606 as the valid value and marks the point as defective.

[0088] When the control unit 4 controls the moving rod 601 to rise, the height of the measuring needle 608 on the electronic display 1 remains unchanged. At this time, the electronic display 1 shows that the upward movement is blocked, indicating that the measuring needle 608 may have pierced a tiny crack in the road surface substrate or been wrapped by an abnormally tough and sticky marking material when it moves downward to measure. This causes it to be unable to retract by normal motor power after the measurement is completed, and the return resistance of the moving rod 601 increases sharply. The control system instantly judges that the measuring needle 608 is in a "stuck" state.

[0089] The emergency reset procedure is initiated. The control unit 4 immediately suspends the retraction of the moving rod 601 and prevents damage to the support buffer 607 caused by forced lifting. The control unit 4 sends a command to the air pump 701 to output maximum power. The high-pressure airflow is injected into the cavity 703 through the air supply channel 702 and drives the sliding ring 704 at its lower end to slide along the sliding cavity 7013, so that the exhaust port 705 is aligned with the point blowing port 7011. At this time, the conical baffle 706, the elastic baffle 707 and the guide shell 708 form a sealed chamber. The high-pressure airflow enters this sealed chamber. In this sealed chamber, the air pressure will act evenly in all directions. The huge upward airflow force is converted into a vertically upward, continuous and stable counter-thrust force. This force acts directly on the elastic baffle 707 connected to the measuring needle 608.

[0090] This upward thrust is sufficient to overcome the clamping force of road surface cracks or sticky materials on the measuring needle 608, pushing it out of the stuck position. When the measuring needle 608 starts to rise normally, the moving rod 601 retracts normally, and the motor immediately intervenes to pull the measuring needle 608 back to the safe initial position. When the height of the measuring needle 608 rises to slightly above the air blowing port 709 on the surface, the high-pressure airflow blows out through the air blowing port 709 on the surface, powerfully cleaning the measuring needle 608.

[0091] Finally, the electronic display 1 records the needle jamming event and displays the verified data measured by the measuring ring 606. The operator can then quickly check the device before continuing with subsequent measurement work.

[0092] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0093] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for measuring the thickness of a highway pavement marking, characterized in that, The utility model relates to a kind of highway marking thickness measuring device, including: Electronic display (1) for showing the working condition of equipment, measurement result and parameter setting; Control part (4) is arranged below electronic display (1), for controlling the vertical movement amount of device;Horizontal frame (2) is arranged below control part (4), for providing support for equipment, and chute (5) is arranged on it, for adjusting the horizontal position of device;Reference platform (3) is symmetrically arranged below horizontal frame (2), and is placed on the two sides of highway marking, for the reference positioning of device;Measuring assembly (6) is arranged inside horizontal frame (2), for measuring marking thickness; Measuring assembly (6) includes measuring needle (608) and measuring ring (606), when marking thickness is measured, if marking is damaged, measuring assembly (6) carries out the switching of measuring needle (608) and measuring ring (606);First slide (6012) is arranged inside the side wall of moving piece (603);Sliding block (6013) is sealingly arranged inside first slide (6012), and closed cavity (6015) is formed between first slide (6012) and first slide (6012);Second slide (6014) is arranged inside the side wall of connecting plate (604), for providing limit and guide for sliding block (6013);Reset part (6017) is arranged with one end connected with sliding block (6013) and the other end connected with first slide (6012); The switching assembly (7) comprises a flow guide shell (708) provided with multiple groups of air blowing ports for switching and resetting of the measuring needle (608) and the measuring ring (606); an air pump (701) provided inside the shell (609) for air input; a cavity (703) provided inside the moving part (603) for air transmission, the upper end of the cavity (703) being communicated with the closed cavity (6015); an air conveying channel (702) having one end communicated with the output end of the air pump (701) and the other end communicated with the cavity (703) for transmitting air from the air pump (701) to the cavity (703); a sliding ring (704) provided at the lower end of the moving part (603), the inside of the sliding ring (704) being communicated with the bottom of the cavity (703); an air outlet (705) provided on the inner and outer rings of the sliding ring (704) and matched with different air blowing ports; an elastic baffle (707) provided outside the measuring needle (608) for guiding air flow; a conical baffle (706) provided inside the flow guide shell (708) and matched with the elastic baffle (707) for forming a closed space and providing power for resetting of the measuring needle (608); a sliding cavity (7013) provided inside the flow guide shell (708) for limiting and guiding sliding of the sliding ring (704); a face-up air blowing port (709) obliquely provided on the outer ring side wall of the flow guide shell (708) and capable of being matched with the air outlet (705) for cleaning the surface of the measuring ring (606); a face-down air blowing port (7010) obliquely provided on the outer ring side wall of the flow guide shell (708) for cleaning the surface of the road below the measuring ring (606); a point-up air blowing port (7011) obliquely provided on the inner ring side wall of the flow guide shell (708) for cleaning the surface of the measuring needle (608) when the measuring needle (608) is lowered to measure the thickness of the marking line; and a point-down air blowing port (7012) obliquely provided on the inner ring side wall of the flow guide shell (708) for cleaning the surface of the road below the measuring needle (608) when the measuring needle (608) is lowered to measure the thickness of the marking line; and the height of the point-up air blowing port (7011) > the height of the point-down air blowing port (7012) > the height of the face-up air blowing port (709) > the height of the face-down air blowing port (7010), the height of the measuring needle (608) > the height of the point-up air blowing port (7011), and the height of the measuring ring (606) > the height of the face-up air blowing port (709).

2. A highway pavement marking thickness measuring device according to claim 1, wherein The measuring assembly (6) further comprises a shell (609) fixedly arranged at the lower end of the horizontal frame (2) for providing support; a moving rod (601) arranged at the lower end of the control part (4) for providing power for up-and-down movement of the measuring needle (608) and the measuring ring (606); a moving plate (602) arranged at the lower end of the moving rod (601); a moving part (603) arranged at the lower end of the moving plate (602), the diameter of the moving part (603) being the same as that of the moving plate (602); A sliding rod (6010) is concentrically arranged at the lower end of the moving plate (602); A connecting plate (604) is arranged outside the moving part (603) and used for connecting the measuring ring (606).

3. A highway pavement marking thickness measuring device according to claim 2, wherein The measuring assembly (6) further comprises a supporting buffer (607) arranged at one end of the lower end of the sliding rod (6010) and at the other end of the upper end of the measuring needle (608); A connecting buffer (605) arranged at one end of the lower end of the connecting plate (604) and at the other end of the upper end of the measuring ring (606); A limiting buffer (6011) arranged at one end of the upper end of the connecting plate (604) and at the other end of the inner top of the shell (609).

4. The highway pavement marking thickness measuring device of claim 1, wherein, The electronic display (1) is an automatic control system, which records and displays the moving distance of the measuring needle (608) and the measuring ring (606) and is used in cooperation with the control part (4); when the measured data of the measuring needle (608) is greatly different from the previously measured data, a signal is transmitted to the control part (4) to start the detection of the measuring ring (606); the measuring ring (606) is of a modular structure, and a plurality of measuring needles (608) are uniformly arranged thereon; the length and the interval of the measuring needle (608) can be adjusted according to the actual detection requirement.

5. The highway pavement marking thickness measuring device of claim 1, wherein, The conical baffle (706) and the elastic baffle (707) are both made of elastic material, and a closed cavity is formed between the conical baffle (706), the elastic baffle (707) and the flow guide shell (708).

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