Road flatness measuring device

Abstract

The application discloses a highway flatness measuring device, belongs to the technical field of road engineering detection, and mainly aims to accurately and efficiently measure the road flatness. The highway flatness measuring device comprises a measuring main ruler and a measuring scale ruler. The measuring main ruler is arranged horizontally on the road surface of a to-be-measured highway. A sliding groove is arranged on the side surface of the measuring main ruler, and the sliding groove extends along the length direction of the measuring main ruler and penetrates through both ends of the measuring main ruler. The measuring scale ruler is slidably connected with the sliding groove through a sliding frame, so that the measuring scale ruler can move along the length direction of the measuring main ruler. The measuring scale ruler is arranged in a vertical state and can move relative to the sliding frame in a vertical direction. One end of the measuring scale ruler close to the road surface of the to-be-measured highway is a measuring end, and the measuring end is used for contacting the road surface of the to-be-measured highway. A scale is marked on the side wall of the measuring scale ruler. An upper edge of the sliding frame close to the scale of the measuring scale ruler forms a vernier, and the vernier is used for cooperating with the scale on the measuring scale ruler to read a measurement value.

Description

Technical Field

[0001] This application belongs to the field of road engineering testing technology, specifically relating to a highway smoothness measuring device. Background Technology

[0002] Road surface smoothness is a key indicator for evaluating road surface quality, directly affecting driving comfort, fuel economy, tire wear, and the long-term durability of the road structure. Uneven road surfaces not only reduce the driving experience but also increase vehicle vibration, accelerate road damage, and may even cause traffic safety hazards.

[0003] Therefore, there is an urgent need for a highway smoothness measurement device to accurately and efficiently measure road surface smoothness during highway construction, acceptance and maintenance. Utility Model Content

[0004] In view of this, this application provides a road surface evenness measuring device, the main purpose of which is to accurately and efficiently measure road surface evenness.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides a highway smoothness measuring device, comprising: A measuring main scale is used to be horizontally erected on the road surface of the road to be measured. The measuring main scale has a sliding groove on its side, which extends along the length of the measuring main scale and passes through both ends of the measuring main scale. A measuring scale is provided, which slides along a slide rail to allow it to move along the length of the main measuring scale. The measuring scale is vertically positioned and can move relative to the slide rail in a vertical direction. The end of the measuring scale closest to the road surface to be measured is the measuring end, which is used to contact the road surface. The side wall of the measuring scale is marked with graduations. The upper edge of the slide rail facing the graduations on the measuring scale forms a vernier, which is used to engage with the graduations on the measuring scale to read the measurement values.

[0006] Optionally, at least two slides are provided, and the at least two slides are parallel and spaced apart; the number of carriages is the same as the number of slides and at least two are provided, each carriage is slidably engaged with the corresponding slide, and the measuring scale is simultaneously connected to all the carriages and can move relative to each carriage in the vertical direction.

[0007] Optionally, the carriage includes a frame, the frame having a guide hole through which the measuring scale passes, the measuring scale passing through the guide hole and being able to slide relative to the frame in a vertical direction; the side of the frame near the main measuring scale has a slider adapted to the slide groove, the slider being slidably disposed within the slide groove.

[0008] Optionally, the frame is provided with a threaded hole communicating with the guide hole, and a set screw is screwed into the threaded hole. The set screw is used to tighten the end of the set screw against the measuring scale after the measuring scale slides relative to the frame to a preset measuring position.

[0009] Optionally, the groove opening facing the carriage has a limiting edge extending along the length direction of the groove. The limiting edge protrudes into the groove along a vertical plane perpendicular to the length direction of the groove, forming a vertical retaining structure. The outer peripheral wall of the slider near the groove opening has a flange that matches the limiting edge. The flange extends circumferentially along the slider. The limiting edge is used to limit the flange in the direction of the groove facing the carriage.

[0010] Optionally, the measuring scale is provided with support feet at the four corners of its bottom, and each support foot is connected to the measuring scale in a vertical direction, and the height of the support foot can be adjusted independently.

[0011] Optionally, the support foot includes a fixed column and a movable base. One end of the fixed column is fixedly connected to the bottom of the measuring main scale, and the other end of the fixed column is provided with an external thread. The top of the movable base is provided with an internal threaded hole, and the internal thread of the internal threaded hole is adapted to the external thread of the fixed column. The movable base is screwed into the fixed column through the internal threaded hole.

[0012] Optionally, a level is provided on the top of the measuring main scale, and the measuring direction of the level is parallel to the length direction of the measuring main scale. The level is used to detect the horizontal status of the measuring main scale in real time.

[0013] Optionally, the scale is in millimeters, and the scale is set to increase from bottom to top starting from the measuring end.

[0014] Optionally, the measuring end of the measuring scale is detachably connected to a wear-resistant pad, one side of which is fixed in contact with the measuring end, and the other side is used to directly contact the road surface of the road to be measured.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The highway smoothness measuring device provided in this application provides a stable benchmark through a horizontally erected measuring main scale. Combined with a slide that can move along the length of the main scale and a measuring scale, multiple measurement points on the road surface to be measured can be flexibly selected. Simultaneously, the measuring scale can move vertically to ensure close contact between the measuring end and the road surface. Combined with the coordination of the vernier on the slide and the scale of the measuring scale, the vertical height data of each measurement point can be accurately read, thereby quickly determining the road surface smoothness. It has high measurement efficiency and data accuracy, efficiently and accurately meeting the measurement needs in highway construction, acceptance, and maintenance. It also helps to identify potential traffic safety hazards caused by uneven road surfaces in advance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a highway smoothness measuring device according to an optional embodiment of this application; Figure 2 This is a schematic diagram of the structure of a carriage according to an optional embodiment of this application; Figure 3 This is a schematic diagram of the measuring scale according to an optional embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 1. Measuring main scale; 11. Slide groove; 12. Limiting edge; 2. Measuring scale; 21. Scale; 3. Slide carriage; 31. Frame; 32. Slider; 321. Flange; 33. Set screw; 4. Support foot; 41. Fixed column; 42. Movable base. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See also Figures 1 to 3 As shown, according to an embodiment of this application, a highway smoothness measuring device is provided, including a measuring main ruler 1 and a measuring scale 21 ruler 2. The measuring main ruler 1 is horizontally mounted on the road surface of the highway to be measured. A sliding groove 11 is provided on the side of the measuring main ruler 1, which extends along the length of the measuring main ruler 1 and passes through both ends of the measuring main ruler 1. The measuring scale 21 ruler 2 is slidably engaged with the sliding groove 11 through a slide 3, so that the measuring scale 21 ruler 2 can move along the length of the measuring main ruler 1. The measuring scale 21 ruler 2 is set vertically and can move relative to the slide 3 in the vertical direction. The end of the measuring scale 21 ruler 2 closest to the road surface of the highway to be measured is the measuring end, which is used to contact the road surface of the highway to be measured. The side wall of the measuring scale 21 ruler 2 is marked with a scale 21. The upper edge of the slide 3 facing the scale 21 ruler 2 forms a vernier, which is used to cooperate with the scale 21 on the measuring scale 21 ruler 2 to read the measurement value.

[0023] The highway smoothness measuring device provided in the embodiments of this application provides a stable reference through a horizontally erected measuring main ruler 1. It is equipped with a slide 3 that can move along the length of the main ruler and a measuring scale 21 ruler 2, which can flexibly select multiple measuring points of the road surface to be measured. At the same time, the measuring scale 21 ruler 2 can move in the vertical direction to ensure that the measuring end is in close contact with the road surface. Combined with the cooperation of the vernier on the slide 3 and the scale 21 on the measuring scale 21 ruler 2, the vertical height data of each measuring point can be accurately read, thereby quickly judging the road surface smoothness. It has high measurement efficiency and data accuracy, and can efficiently and accurately meet the measurement needs in highway construction, acceptance and maintenance. It also helps to identify traffic safety hazards caused by uneven road surface in advance.

[0024] The main measuring scale 1 is roughly a long strip structure, made of high-strength aluminum alloy and other rigid materials to give it sufficient rigidity so that it can effectively resist bending deformation that may occur during the measurement process. It can be stably and well horizontally erected on the road surface to be measured, thus providing a precise horizontal reference standard for the entire flatness measurement work and ensuring the accuracy of the data at each subsequent measurement point.

[0025] Specifically, to ensure that the measurement range matches the actual extension direction of the road under test, the length direction of the measuring main scale 1 is aligned with the extension direction of the road under test when it is set up. Based on this, the measurement area covered by the measuring main scale 1 can conform to the direction of the road under test. Subsequently, when the measuring scale 21 feet 2 is moved by the slide 3, measurement points can be evenly selected along the extension path of the road under test, so as to more accurately reflect the overall flatness of the road under test.

[0026] Among them, a groove 11 is opened on the side of the measuring main scale 1, which runs through both ends of the measuring main scale 1. The extension direction of the groove 11 is consistent with the length direction of the measuring main scale 1, and is used to provide a track for the movement of the measuring scale 21.

[0027] Specifically, a slide 3 is slidably mounted within the groove 11 of the main measuring scale 1, and the slide 3 is used to support the measuring scale 21. In actual measurement scenarios, the slide 3, on the one hand, is engaged with the main measuring scale 1 through sliding cooperation with the groove 11, enabling the measuring scale 21 to move flexibly along the length of the main measuring scale 1, thus facilitating the selection of measurement points at different locations on the road surface to be measured by the staff; on the other hand, the upper edge of the slide 3 facing the scale 21 on the measuring scale 21 can be directly used as a vernier, and through precise cooperation with the scale 21 on the measuring scale 21, the staff can quickly and accurately read the specific value of each measurement point.

[0028] The measuring scale 21 foot 2 is set vertically and can move up and down relative to the slide 3 in the vertical direction. The end closest to the road surface to be measured is the measuring end, which will directly contact the road surface during the measurement process; at the same time, the measuring scale 21 foot 2 is marked with scale 21 on its side wall, which is the basis for reading the vertical height data of each measuring point on the road surface to be measured relative to the horizontal reference.

[0029] Specifically, in some examples, to further improve measurement accuracy and clarify the reading benchmark, the accuracy of the scale 21 on the measuring scale 21 is set to the millimeter level, with a minimum division value of 1 mm and an estimable value of 0.5 mm. The scale 21 values ​​are arranged in ascending order from bottom to top, starting from the measuring end. The operator can directly align the vernier on the carriage 3 with the scale 21 and quickly read the vertical distance from the measuring end to the carriage 3. This distance corresponds to the vertical distance from the road surface to be measured to the top surface of the carriage 3. In actual measurement scenarios, the working principle of this highway smoothness measuring device is as follows: First, the measuring main scale 1 is horizontally set up on the road surface to be measured, and the measurement range and horizontal reference line are determined. Then, the slide 3 is pushed to move the measuring scale 21 (foot 2) along the slide groove 11 of the measuring main scale 1 to the target measurement point. Subsequently, the vertical measuring scale 21 (foot 2) is adjusted so that its measuring end just contacts the road surface to be measured. At this time, the upper edge of the slide 3 facing the scale 21 (foot 2) is used as a vernier to align with the scale 21 (foot 2). The vertical height of this point relative to the measuring main scale 1, i.e., the horizontal reference, can be read, thereby determining the smoothness of the road surface at this location. Subsequently, it is only necessary to record the reading changes of the measuring scale 21 (foot 2) at regular intervals, such as 0.5 meters. By comparing the reading differences at each measuring point, the smoothness of the road surface to be measured can be calculated. In addition, in other examples, see... Figure 3 As shown, the starting point of the scale 21 of the measuring scale 21 is not at the measuring end, but starts from the middle of the measuring scale 21. The value of the scale 21 increases upward along the scale 21. This indicates that the value of the scale 21 does not necessarily start from the measuring end. There are cases where the starting position of the scale 21 does not coincide with the measuring end. The starting point of the scale 21 can be set according to the actual measurement requirements or design. This application does not limit this.

[0030] It should be noted that in the measurement logic of this highway smoothness measuring device, the measuring main scale 1 and the carriage 3 on the sliding groove 11 of the measuring main scale 1 can be regarded as a horizontal reference. The measuring main scale 1 provides a basic horizontal reference for the overall measurement through the horizontal frame, while the carriage 3, because it slides with the sliding groove 11 and keeps in a horizontal state with the measuring main scale 1, also moves in sync with this horizontal reference. Together, they constitute the benchmark for judging the vertical height of each point on the road surface and thus calculating the smoothness deviation.

[0031] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, at least two slide grooves 11 are provided, and at least two slide grooves 11 are arranged in parallel and spaced apart; the number of slides 3 is the same as the number of slide grooves 11 and at least two are provided, each slide 3 is slidably engaged with the corresponding slide groove 11, and the measuring scale 21 ruler 2 is simultaneously connected to all slides 3 and can move relative to each slide 3 in the vertical direction.

[0032] In this embodiment, by setting at least two parallel and spaced slide grooves 11 and matching them with an equal number of carriages 3, the measuring scale 21 feet 2 is simultaneously connected to all carriages 3, which improves the stability and measurement accuracy of the measuring scale 21 feet 2. The cooperative structure of multiple carriages 3 and slide grooves 11 effectively limits the lateral offset or swaying of the measuring scale 21 feet 2 during movement and measurement, ensuring that it always remains vertical and avoiding tilting problems that may occur due to support by a single carriage 3. At the same time, this multi-point support method makes the measuring scale 21 feet 2 more stable when moving along the main scale and more accurate in its contact position with the road surface to be measured, further ensuring the reliability of the vertical height data of each measurement point and providing a more stable measurement basis for subsequent calculation of road surface smoothness.

[0033] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the slide 3 includes a frame 31, on which a guide hole is provided for the measuring scale 21 ruler 2 to pass through. The measuring scale 21 ruler 2 passes through the guide hole and can slide relative to the frame 31 in the vertical direction. A slider 32 adapted to the slide groove 11 is provided on the side of the frame 31 near the measuring main scale 1. The slider 32 is slidably disposed in the slide groove 11.

[0034] In this embodiment, the frame 31 of the slide 3 guides the measuring scale 212 through the guide hole, which makes the measuring scale 212 move more smoothly in the vertical direction and keep it in a vertical state, avoiding deviation. At the same time, the slider 32 on one side of the frame 31 is adapted to slide with the slide groove 11 of the measuring main scale 1, so that when the slide 3 drives the measuring scale 212 to move along the length of the main scale, it can stably fit the track of the slide groove 11 and reduce shaking.

[0035] The frame 31 is the main support structure of the slide 3. The frame 31 is provided with guide holes through which the measuring scale 21 is inserted, and it can slide freely relative to the frame 31 in the vertical direction.

[0036] Specifically, the frame 31 of the carriage 3 adopts a cuboid shape with open top and bottom, thus providing sufficient space for the measuring scale 21 to pass through the guide hole and avoiding obstruction to its vertical sliding.

[0037] The frame 31 is equipped with a slider 32 on the side near the main measuring scale 1, which is adapted to the slide groove 11 of the main measuring scale 1. The slider 32 is slidably installed inside the slide groove 11. Based on this, the slide 3 can move smoothly along the length direction of the main measuring scale 1 by means of the sliding cooperation between the slider 32 and the slide groove 11. In the actual measurement process, the staff can push the slide 3 to switch between different positions of the main measuring scale 1 with the measuring scale 21, thereby flexibly selecting multiple measurement points of the road surface to be measured, and meeting the needs of measuring the smoothness of the road surface to be measured.

[0038] Specifically, in actual measurement scenarios, the slide groove 11 of the measuring main scale 1 extends through both ends along its length, thus forming an opening at each end of the measuring main scale 1, and both openings are connected to the interior of the slide groove 11. Based on this, the slider 32 on the carriage 3 can slide directly into the slide groove 11 through these two through openings to assemble the carriage 3 with the measuring main scale 1; when it is necessary to disassemble or adjust the position of the carriage 3, the slider 32 can also slide out of the slide groove 11 through these two openings, making the operation flexible and convenient.

[0039] In the above embodiments, see Figure 1 and Figure 2 As shown, the frame 31 is provided with a threaded hole that communicates with the guide hole. A set screw 33 is screwed into the threaded hole. The set screw 33 is used to tighten the end of the set screw 33 against the measuring scale 21 after the measuring scale 212 slides relative to the frame 31 to the preset measuring position.

[0040] Here, by providing a threaded hole on the frame 31 of the slide 3 that communicates with the guide hole, and screwing a set screw 33 into it, when the measuring scale 21 ruler 2 slides relative to the slide 3 to the preset measuring position, the end of the set screw 33 can be tightened to press against the measuring scale 21 ruler 2. Based on this, the measuring scale 21 ruler 2 can be effectively locked and fixed after being adjusted to the correct position, preventing it from changing position due to accidental sliding or external vibration during the reading process, thereby ensuring the stability and accuracy of the measurement data; at the same time, the set screw 33 has a simple structure and is easy to operate, allowing operators to quickly complete the locking and releasing actions, improving the practicality of the device and the measurement efficiency.

[0041] Among them, the measuring scale 21 feet 2 is adjusted relative to the slide 3 to a position that can accurately reflect the road surface height at the current measuring point.

[0042] In the above embodiments, see Figure 1 and Figure 2 As shown, the groove 11 facing the slide 3 has a limiting edge 12 extending along the length of the groove 11. The limiting edge 12 protrudes into the groove 11 along a vertical plane perpendicular to the length of the groove 11, forming a vertical guard structure. The outer peripheral wall of the slider 32 near the groove has a flange 321 that matches the limiting edge 12. The flange 321 extends along the circumference of the slider 32. The limiting edge 12 is used to limit the flange 321 in the direction of the groove 11 facing the slide 3.

[0043] Here, by setting an inwardly protruding limiting edge 12 at the opening of the slide groove 11 and a matching flange 321 at the corresponding position on the outer peripheral wall of the slider 32, a vertical guard structure is formed, which can effectively prevent the slide 3 from accidentally coming off the slide groove 11. Specifically, the limiting edge 12 is used to constrain the flange 321 of the slider 32 in a vertical plane perpendicular to the length direction of the slide groove 11, so that the slide 3 is reliably confined in the groove when it moves along the slide groove 11. Even if it is subjected to large vibration or improper operation, the slide 3 will not completely detach from the measuring main scale 1, thereby improving the stability and safety of the device operation. At the same time, this structure is simple and reliable, and can achieve effective anti-detachment function without additional complex parts, ensuring the continuity and accuracy of the measurement process.

[0044] Among them, the limiting edge 12 is located at the groove opening of the slide 11 on the measuring main scale 1. It is a protruding structure that extends along the entire length of the slide 11, protruding from the inner wall of the slide 11 toward the center of the slide 11 in a vertical direction, forming a vertical guard edge structure.

[0045] Specifically, in this embodiment, a limiting edge 12 is provided on both sides of the groove opening of the slide groove 11. The two limiting edges 12 extend along the length direction of the slide groove 11 and both protrude into the inside of the slide groove 11 to form a symmetrical vertical guard edge structure.

[0046] The flange 321 is located on the slider 32 of the carriage 3. The slider 32 is the part of the carriage 3 that is inserted into the groove 11. The flange 321 is a raised ring that surrounds the outer peripheral wall of the slider 32 and extends continuously along the circumference of the slider 32, located on one side close to the opening of the groove 11.

[0047] Specifically, when the slider 32 of the slide 3 is inserted into the slide groove 11, the flange 321 on the slider 32 will be located on the side of the limiting edge 12 away from the frame 31, ensuring that the slider 32 can only slide in the slide groove 11 and cannot fall out of the groove.

[0048] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the measuring main scale 1 is provided with support feet 4 at the four corners of its bottom. Each support foot 4 is connected to the measuring main scale 1 in the vertical direction, and the height of the support foot 4 can be adjusted independently.

[0049] In this embodiment, by setting independently adjustable support feet 4 at the four corners of the bottom of the measuring main scale 1, it can effectively adapt to local unevenness or inclination of the road being measured, ensuring that the measuring main scale 1 can still be accurately leveled on complex road surfaces. Specifically, by individually adjusting the length of the four support feet 4, the posture of the measuring main scale 1 in space can be finely adjusted, allowing it to quickly reach a horizontal state, thereby providing an accurate and stable horizontal reference for the entire measurement system. This not only improves the applicability of the device and the flexibility of on-site operation, but also significantly enhances the reliability of the measurement results, avoids systematic errors caused by the tilt of the main scale, and ensures the accuracy of road smoothness detection.

[0050] In the above embodiments, see Figure 1 As shown, the support foot 4 includes a fixed column 41 and a movable base 42. One end of the fixed column 41 is fixedly connected to the bottom of the measuring main scale 1, and the other end of the fixed column 41 is provided with an external thread. The top of the movable base 42 is provided with an internal thread hole, and the internal thread of the internal thread hole is adapted to the external thread of the fixed column 41. The movable base 42 is screwed into the fixed column 41 through the internal thread hole.

[0051] Here, by configuring the support foot 4 as a structure in which a fixed post 41 with external threads is screwed into a movable base 42 with internal threaded holes, continuous and precise adjustment of the height of the support foot 4 is achieved. By rotating the movable base 42, the principle of threaded engagement can be used to move it up and down along the fixed post 41, thereby fine-tuning the overall length of the support foot 4, ensuring that the measuring scale 1 can be quickly and accurately leveled under different road conditions. This structure has good mechanical stability, is easy to adjust, and the self-locking characteristic of the threads can effectively prevent the support foot 4 from loosening due to vibration during measurement, ensuring the stability of the measurement benchmark and the reliability of the device.

[0052] In some possible embodiments disclosed in this application, a level is provided on the top of the measuring main scale 1. The measuring direction of the level is parallel to the length direction of the measuring main scale 1. The level is used to detect the horizontal status of the measuring main scale 1 in real time.

[0053] In this embodiment, by setting a level on the top of the measuring main scale 1 with its measuring direction parallel to its length direction, the horizontal status of the measuring main scale 1 can be monitored in real time and intuitively, providing a direct basis for rapid on-site leveling. When setting up the device, the staff can adjust the four corner support feet 4 synchronously according to the level indicator until the bubble is centered, ensuring that the measuring main scale 1 is accurately in a horizontal reference state, thereby effectively avoiding systematic measurement errors caused by the tilt of the main scale. This setting significantly improves the convenience and accuracy of the leveling operation, ensuring the reliability and data accuracy of the entire flatness measurement process.

[0054] In some possible embodiments disclosed in this application, the measuring end of the measuring scale 21 feet 2 is detachably connected to a wear-resistant pad. One side of the wear-resistant pad is fixed in contact with the measuring end, and the other side is used to directly contact the road surface of the road to be measured.

[0055] In this embodiment, by detachably connecting a wear-resistant pad to the measuring end of the 21-foot-2 measuring scale, the wear-resistant pad directly contacts the road surface to be measured. This effectively protects the measuring end from wear, scratches, or deformation, extending the service life and measurement accuracy of the 21-foot-2 measuring scale. Simultaneously, the wear-resistant pad is made of high-hardness, wear-resistant materials such as rubber, maintaining a flat and stable contact surface during long-term, frequent measurements, ensuring consistent contact conditions for each measurement and improving data repeatability and accuracy. Furthermore, the detachable design facilitates replacement when the wear-resistant pad is damaged or severely worn, eliminating the need to replace the entire 21-foot-2 measuring scale, reducing maintenance costs and improving the practicality and economy of the device.

[0056] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0057] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A highway smoothness measuring device, characterized in that, include: A measuring main scale is used to be horizontally erected on the road surface of the road to be measured. The measuring main scale has a sliding groove on its side, which extends along the length of the measuring main scale and passes through both ends of the measuring main scale. A measuring scale is provided, which slides along a slide rail to allow it to move along the length of the main measuring scale. The measuring scale is vertically positioned and can move relative to the slide rail in a vertical direction. The end of the measuring scale closest to the road surface to be measured is the measuring end, which is used to contact the road surface. The side wall of the measuring scale is marked with graduations. The upper edge of the slide rail facing the graduations on the measuring scale forms a vernier, which is used to engage with the graduations on the measuring scale to read the measurement values.

2. The highway smoothness measuring device according to claim 1, characterized in that, At least two slide rails are provided, and the at least two slide rails are parallel and spaced apart; the number of slides is the same as the number of slide rails and at least two are provided, each slide rail is slidably engaged with the corresponding slide rail, and the measuring scale is simultaneously connected to all slides and can move relative to each slide rail in the vertical direction.

3. The highway smoothness measuring device according to claim 1, characterized in that, The carriage includes a frame, on which a guide hole is provided for the measuring scale to pass through. The measuring scale passes through the guide hole and can slide relative to the frame in a vertical direction. A slider adapted to the slide groove is provided on the side of the frame near the main measuring scale. The slider is slidably disposed in the slide groove.

4. The highway smoothness measuring device according to claim 3, characterized in that, The frame is provided with a threaded hole that communicates with the guide hole. A set screw is screwed into the threaded hole. The set screw is used to tighten the end of the set screw against the measuring scale after the measuring scale slides relative to the frame to a preset measuring position.

5. The highway smoothness measuring device according to claim 3, characterized in that, The groove facing the carriage has a limiting edge extending along the length of the groove. The limiting edge protrudes into the groove along a vertical plane perpendicular to the length of the groove, forming a vertical retaining structure. The outer peripheral wall of the slider near the groove has a flange that matches the limiting edge. The flange extends circumferentially along the slider. The limiting edge is used to limit the flange in the direction of the groove facing the carriage.

6. The highway smoothness measuring device according to claim 1, characterized in that, The measuring scale has four support feet at its bottom corners. Each support foot is connected to the measuring scale in a vertical direction, and the height of each support foot can be adjusted independently.

7. The highway smoothness measuring device according to claim 6, characterized in that, The support foot includes a fixed column and a movable base. One end of the fixed column is fixedly connected to the bottom of the measuring main scale, and the other end of the fixed column is provided with an external thread. The top of the movable base is provided with an internal thread hole, and the internal thread of the internal thread hole is adapted to the external thread of the fixed column. The movable base is screwed into the fixed column through the internal thread hole.

8. The highway smoothness measuring device according to claim 1, characterized in that, The top of the measuring scale is equipped with a level, and the measuring direction of the level is parallel to the length direction of the measuring scale. The level is used to detect the horizontal status of the measuring scale in real time.

9. The highway smoothness measuring device according to claim 1, characterized in that, The scale is in millimeters, and the scale increments from bottom to top starting from the measuring end.

10. The highway smoothness measuring device according to claim 1, characterized in that, The measuring end of the measuring scale is detachably connected to a wear-resistant pad. One side of the wear-resistant pad is fixed to the measuring end, and the other side is used to directly contact the road surface of the road to be measured.

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