A device for measuring the loose thickness of an asphalt concrete pavement

Abstract

The utility model relates to bituminous pavement construction quality detection technical field, concretely is a kind of bituminous concrete pavement loose laying thickness's measuring equipment, including stable base plate, adjusting measuring mechanism and stable moving mechanism, adjusting measuring mechanism is screw thread connection in the top of stable base plate, stable moving mechanism is fixedly connected in the bottom of stable base plate, adjusting measuring mechanism includes the support frame of screw thread connection in the top of stable base plate.The utility model is in, through the setting of pressure sensor, displacement sensor and measuring cutting stick, the automation of loose laying thickness is realized, high-precision measurement, electric telescopic column provides stable uniform insertion power, cooperates the guiding effect of the insertion through hole, it is guaranteed that measuring cutting stick is always vertically inserted, avoid the inclination error caused by artificial pressing, pressure sensor can automatically perceive probe head contact the instant of lower bearing layer, replace artificial hand feeling judgment, eliminate subjective error, combine displacement sensor, so that measurement accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of asphalt pavement construction quality testing technology, and in particular to a measuring device for the loose thickness of asphalt concrete pavement. Background Technology

[0002] The loose-lay thickness of asphalt concrete pavement is a core indicator for construction quality control, directly determining the elevation accuracy, structural load-bearing capacity, and service life of the compacted pavement. Highway engineering construction specifications stipulate that the loose-lay thickness deviation must be strictly controlled within ±5mm; otherwise, it can easily lead to insufficient pavement smoothness, rutting, and early damage. Therefore, efficient and accurate thickness measurement technology is a crucial component of the asphalt pavement quality assurance system.

[0003] The existing technical solution relies on manual pressing during the measurement process. Uneven insertion force can easily cause the detection rod to tilt, resulting in deviations in thickness readings. Since there is no automatic depth sensing mechanism, manual judgment is required to determine whether the detection rod is in contact with the underlying layer, which leads to significant subjective errors.

[0004] To address the above problems, this utility model provides a measuring device for the loose thickness of asphalt concrete pavement. Utility Model Content

[0005] The purpose of this invention is to solve the problems of low measurement accuracy and reliance on manual judgment of the endpoint in the existing technology, and to propose a measuring device for loose asphalt concrete pavement thickness.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a measuring device for loose asphalt concrete pavement thickness, comprising a stabilizing base plate, an adjusting measuring mechanism, and a stabilizing moving mechanism, wherein the adjusting measuring mechanism is threadedly connected to the top of the stabilizing base plate, the stabilizing moving mechanism is fixedly connected to the bottom of the stabilizing base plate, and the adjusting measuring mechanism includes a support frame threadedly connected to the top of the stabilizing base plate.

[0007] The adjustment and measurement mechanism includes a measurement component and an adjustment component. The measurement component includes a pressure sensor and a displacement sensor, and the adjustment component includes a rotating threaded rod and a bottom inclined support plate.

[0008] The measuring component also includes a lifting support plate threaded to the outer surface of the adjusting component. An electric telescopic column is fixedly connected to the bottom of the lifting support plate. The pressure sensor is fixedly connected to the bottom of the electric telescopic column. A measuring insertion rod is fixedly connected to the bottom of the pressure sensor. A connecting frame is threaded to the outer surface of the measuring insertion rod. The displacement sensor is symmetrically fixedly connected to one side of the outer surface of the connecting frame.

[0009] Furthermore, a connecting bolt is threaded onto the other side of the outer surface of the connecting frame, and the connecting frame is threaded onto the outer surface of the measuring cutting rod via the connecting bolt. A sharp head is fixedly connected to the bottom of the measuring cutting rod.

[0010] Furthermore, the measuring component also includes a fixed frame fixedly connected to the top of the lifting support plate, and a shock-absorbing damper is symmetrically fixedly connected inside the fixed frame, and a shock-absorbing telescopic spring is sleeved on the outer surface of the shock-absorbing damper.

[0011] Furthermore, the top of the damper is threaded with a connector, and the top of the damper is threaded with a data processor via the connector. The data processor is threaded to the top of the damper via the connector.

[0012] Furthermore, the adjustment assembly includes a servo motor fixedly connected inside the support frame, a rotating threaded rod fixedly connected to the output end of the servo motor, and two sliding blocks threadedly connected at intervals on the outer surface of the rotating threaded rod, with limiters threadedly connected to the outer surface of the sliding blocks.

[0013] Furthermore, one end of the lifting support plate is threadedly connected to the outer surface of the top sliding block via a limiting member, the bottom of the bottom inclined support plate is threadedly connected to the outer surface of the bottom sliding block via a limiting member, and the top of the bottom inclined support plate is threadedly connected to the bottom of the bottom inclined support plate.

[0014] Furthermore, the stabilizing and moving mechanism includes an insertion through hole opened on the top of the stabilizing base plate, the insertion through hole and the measuring insertion rod are located on the same central axis, the stabilizing and moving mechanism also includes an adjuster threadedly connected to the edge of the outer surface of the stabilizing base plate, the bottom of the adjuster is rotatably connected to a bearing, the outer surface of the bearing is fixedly connected to a stabilizing base, and the stabilizing and moving mechanism also includes moving wheels fixedly connected to the four corners of the bottom of the stabilizing base plate.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, the automated and high-precision measurement of loose paving thickness is achieved by setting up a pressure sensor, a displacement sensor, and a measuring insertion rod. The electric telescopic column provides stable and uniform insertion power, and with the guiding effect of the through hole, it ensures that the measuring insertion rod is always inserted vertically, avoiding tilting errors caused by manual pressing. The pressure sensor can automatically sense the moment when the probe touches the underlying layer, replacing manual judgment and eliminating subjective errors. Combined with the displacement sensor, the measurement accuracy is improved. The data processor integrates data acquisition, processing, storage, and export functions, and can automatically generate measurement data archives. The servo motor-driven adjustment component can precisely adjust the initial measurement height to adapt to different wide-range loose paving thickness measurement needs.

[0017] 2. In this utility model, the operation stability and environmental adaptability of the equipment are significantly improved by setting up a shock absorber, a bottom inclined support plate and a stable base. The shock absorber and shock absorber extension spring in the fixed frame form a double buffer structure, which can absorb most of the vibration impact at the construction site and avoid vibration interference to the data processor and sensors. The triangular support structure formed by the bottom inclined support plate makes the lifting support plate maintain stable lifting during the lifting process, ensuring the stability of the measuring components. The stable base and the adjuster work together to realize the rapid leveling of the equipment and provide a stable reference for measurement. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of a device for measuring the loose thickness of asphalt concrete pavement is provided for this utility model.

[0019] Figure 2 This utility model provides a schematic diagram of the structure of a displacement sensor in an equipment for measuring the loose thickness of asphalt concrete pavement;

[0020] Figure 3 This utility model proposes a measuring device for the loose thickness of asphalt concrete pavement. Figure 2 Enlarged view of point A;

[0021] Figure 4 This utility model provides a schematic diagram of the bottom inclined support plate in a measuring device for loose asphalt concrete pavement thickness.

[0022] Figure 5 This utility model provides a structural schematic diagram of a stable base in an equipment for measuring the loose thickness of asphalt concrete pavement;

[0023] Figure 6 This utility model proposes a measuring device for the loose thickness of asphalt concrete pavement. Figure 5 Enlarged diagram of point B.

[0024] Legend:

[0025] 1. Stabilizing base plate; 2. Adjusting measuring mechanism; 21. Support frame; 22. Measuring component; 221. Pressure sensor; 222. Displacement sensor; 223. Lifting support plate; 224. Electric telescopic column; 225. Measuring insertion rod; 226. Connecting frame; 227. Connecting bolt; 228. Sharp head; 229. Fixing frame; 2291. Shock absorber; 2292. Shock absorber telescopic spring; 2293. Connecting piece; 2294. Data processor; 23. Adjusting component; 231. Rotating threaded rod; 232. Bottom tilting support plate; 233. Servo motor; 234. Sliding block; 235. Limiting component; 3. Stabilizing moving mechanism; 31. Through hole; 32. Adjuster; 33. Bearing; 34. Stabilizing base; 35. Moving wheel. Detailed Implementation

[0026] Please see Figure 1-6 This utility model provides a technical solution: a measuring device for loose asphalt concrete pavement thickness, including a stable base plate 1, an adjusting measuring mechanism 2 and a stable moving mechanism 3. The adjusting measuring mechanism 2 is threadedly connected to the top of the stable base plate 1, and the stable moving mechanism 3 is fixedly connected to the bottom of the stable base plate 1. The adjusting measuring mechanism 2 includes a support frame 21 threadedly connected to the top of the stable base plate 1.

[0027] The specific settings and functions of the adjustment and measurement mechanism 2 and the stabilizing and moving mechanism 3 will be explained in detail below.

[0028] In this embodiment: the adjustment measuring mechanism 2 includes a measuring component 22 and an adjustment component 23. The measuring component 22 includes a pressure sensor 221 and a displacement sensor 222. The adjustment component 23 includes a rotating threaded rod 231 and a bottom inclined support plate 232.

[0029] The measuring component 22 also includes a lifting support plate 223 threadedly connected to the outer surface of the adjusting component 23. An electric telescopic column 224 is fixedly connected to the bottom of the lifting support plate 223. A pressure sensor 221 is fixedly connected to the bottom of the electric telescopic column 224. A measuring insertion rod 225 is fixedly connected to the bottom of the pressure sensor 221. A connecting frame 226 is threadedly connected to the outer surface of the measuring insertion rod 225. A displacement sensor 222 is symmetrically fixedly connected to one side of the outer surface of the connecting frame 226.

[0030] The effects achieved by the above components are as follows: the lifting support plate 223 provides a stable installation benchmark for the measuring components; the electric telescopic column 224 replaces manual output of uniform and controllable insertion power, avoiding measurement deviation caused by uneven force; the pressure sensor 221 monitors the pressure change when the measuring insertion rod 225 contacts the underlying layer in real time; the displacement sensor 222 captures the insertion depth synchronously through the connecting frame 226; the combination of the two realizes the automatic acquisition of thickness data, breaking through the accuracy limitations of traditional manual reading; the rotating threaded rod 231 of the adjustment component 23 and the bottom inclined support plate 232 provide the height adjustment capability of the measuring component 22, adapting to different loose layer thickness scenarios.

[0031] Specifically, a connecting bolt 227 is threadedly connected to the other side of the outer surface of the connecting frame 226. The connecting frame 226 is threadedly connected to the outer surface of the measuring insertion rod 225 through the connecting bolt 227. A sharp head 228 is fixedly connected to the bottom of the measuring insertion rod 225.

[0032] The effects achieved by the above components are as follows: the connecting bolt 227 can quickly fix the position of the connecting frame 226 on the measuring insertion rod 225 through the thread locking force; the sharp head 228 adopts a cone angle design, which greatly reduces the resistance when inserting into the loose layer, reduces the disturbance to the original structure of the asphalt mixture, and at the same time ensures that the measuring insertion rod 225 penetrates accurately in the vertical direction, further improving the authenticity of the thickness detection.

[0033] Specifically, the measuring component 22 also includes a fixed frame 229 fixedly connected to the top of the lifting support plate 223. The fixed frame 229 has a shock absorber 2291 symmetrically fixedly connected inside, and a shock absorber extension spring 2292 is sleeved on the outer surface of the shock absorber 2291.

[0034] The effect achieved by the above components is as follows: the damping damper 2291 and the damping telescopic spring 2292 inside the fixed frame 229 form a dual buffer system. When the equipment is subjected to vibration and impact at the construction site, the damping telescopic spring 2292 first absorbs the high-frequency vibration energy, while the damping damper 2291 attenuates the low-frequency shaking through hydraulic damping. The two work together to reduce external vibration interference, provide a stable working environment for the pressure sensor 221, displacement sensor 222 and data processor 2294, and avoid the drift of detection data caused by vibration.

[0035] Specifically, the top of the damper 2291 is threaded with a connector 2293, and the top of the damper 2291 is threaded with a data processor 2294 via the connector 2293. The data processor 2294 is threaded to the top of the damper 2291 via the connector 2293.

[0036] The effects achieved by the above components are as follows: the connector 2293 realizes the rigid connection between the data processor 2294 and the shock absorption system, ensuring the effective protection of the data processing module by the buffer structure; the data processor 2294 receives sensor signals through shielded wires, and converts the pressure threshold trigger signal and displacement data into loose thickness value by combining the preset algorithm, while realizing the data storage and export function, replacing the traditional manual recording, and meeting the standardized requirements of construction quality traceability.

[0037] Specifically, the adjustment component 23 includes a servo motor 233 fixedly connected inside the support frame 21, a rotating threaded rod 231 fixedly connected to the output end of the servo motor 233, and two sliding blocks 234 threadedly connected to the outer surface of the rotating threaded rod 231 at intervals. A limiter 235 is threadedly connected to the outer surface of the sliding blocks 234.

[0038] The effects achieved by the above components are as follows: the servo motor 233 provides precise and controllable rotational power to the rotating threaded rod 231, enabling the rotating threaded rod 231 to rotate smoothly at low speed; the limiting component 235 ensures the connection stability between the sliding block 234 and the lifting support plate 223 and the bottom inclined support plate 232, and avoids loosening or displacement of components during the adjustment process.

[0039] Specifically, one end of the lifting support plate 223 is threadedly connected to the outer surface of the top sliding block 234 via the limiting member 235, the bottom of the bottom inclined support plate 232 is threadedly connected to the outer surface of the bottom sliding block 234 via the limiting member 235, and the top of the bottom inclined support plate 232 is threadedly connected to the bottom of the bottom inclined support plate 232.

[0040] The effect achieved by the above components is as follows: the top sliding block 234 drives the lifting support plate 223 to rise and fall synchronously through the limiting member 235, and the bottom inclined support plate 232 achieves support in the relative movement of the upper and lower sliding blocks 234, forming an isosceles triangle stable support structure, providing a stable height adjustment reference for the measuring component 22.

[0041] Specifically, the stabilizing and moving mechanism 3 includes an insertion through hole 31 opened on the top of the stabilizing base plate 1. The insertion through hole 31 and the measuring insertion rod 225 are located on the same central axis. The stabilizing and moving mechanism 3 also includes an adjuster 32 threadedly connected to the edge of the outer surface of the stabilizing base plate 1. The bottom of the adjuster 32 is rotatably connected to a bearing 33. The outer surface of the bearing 33 is fixedly connected to a stabilizing base 34. The stabilizing and moving mechanism 3 also includes moving wheels 35 fixedly connected to the four corners of the bottom of the stabilizing base plate 1.

[0042] The effects achieved by the above components are as follows: the coaxial design of the through hole 31 and the measuring insertion rod 225 provides vertical guidance for the measuring insertion rod 225, avoiding tilting during insertion; the adjuster 32 adjusts the height of the stable base 34 through threaded transmission, and with the cooperation of the bearing 33, it achieves smooth rotation during adjustment, and can quickly adjust the stable base plate 1 to a horizontal state.

[0043] Working principle: First, push the equipment to the measurement point, step on the moving wheel 35 to brake and fix it, and drive the stabilizing base 34 to rise and fall through the rotary adjuster 32. At this time, the stabilizing base 34 is in close contact with the ground, providing rigid support for the equipment.

[0044] According to the estimated loose paving thickness in the construction plan, loosen the connecting bolts 227, adjust the position of the connecting frame 226 along the scale line of the measuring insertion rod 225, tighten the connecting bolts 227 to complete the fixation, and set the pressure trigger threshold through the touch screen of the data processor 2294 to control the extension speed of the electric telescopic column 224.

[0045] The data processor 2294 controls the servo motor 233 to rotate, driving the rotating threaded rod 231 to rotate. The sliding block 234 moves synchronously along the reverse thread. The bottom inclined support plate 232 changes its support angle, causing the lifting support plate 223 to descend until the sharp head 228 of the measuring insertion rod 225 contacts the loose layer surface, at which point the servo motor 233 stops working.

[0046] The measurement program is started, and the electric telescopic column 224 extends at a set speed, pushing the measuring insertion rod 225 through the through hole 31 and inserting it into the loose layer. The displacement sensor 222 collects the insertion depth data in real time and transmits it to the data processor 2294. When the measuring insertion rod 225 contacts the underlying layer, the pressure sensor 221 detects that the pressure value suddenly increases to the threshold and immediately sends a stop signal to the electric telescopic column 224.

[0047] After receiving the pressure trigger signal, the data processor 2294 locks the real-time reading of the displacement sensor 222, calculates the result using the algorithm "loose thickness = final displacement value - initial displacement value", displays the thickness data on the touch screen and automatically stores it. After the measurement is completed, the electric telescopic column 224 retracts and resets, and the servo motor 233 reverses to drive the lifting support plate 223 to rise, completing a single measurement process.

Claims

1. A measuring device for the loose thickness of asphalt concrete pavement, comprising a stabilizing base plate (1), an adjusting measuring mechanism (2), and a stabilizing moving mechanism (3), characterized in that: The adjustment and measuring mechanism (2) is threaded to the top of the stable base plate (1), and the stable moving mechanism (3) is fixedly connected to the bottom of the stable base plate (1). The adjustment and measuring mechanism (2) includes a support frame (21) threaded to the top of the stable base plate (1). The adjustment and measurement mechanism (2) includes a measurement component (22) and an adjustment component (23). The measurement component (22) includes a pressure sensor (221) and a displacement sensor (222). The adjustment component (23) includes a rotating threaded rod (231) and a bottom inclined support plate (232). The measuring component (22) also includes a lifting support plate (223) threaded to the outer surface of the adjusting component (23). The bottom of the lifting support plate (223) is fixedly connected to an electric telescopic column (224). The pressure sensor (221) is fixedly connected to the bottom of the electric telescopic column (224). The bottom of the pressure sensor (221) is fixedly connected to a measuring insertion rod (225). The outer surface of the measuring insertion rod (225) is threadedly connected to a connecting frame (226). The displacement sensor (222) is symmetrically fixedly connected to one side of the outer surface of the connecting frame (226).

2. The measuring device for loose asphalt concrete pavement thickness according to claim 1, characterized in that: The connecting frame (226) is threaded with a connecting bolt (227) on the other side of its outer surface. The connecting frame (226) is threaded to the outer surface of the measuring insertion rod (225) by the connecting bolt (227). A sharp head (228) is fixedly connected to the bottom of the measuring insertion rod (225).

3. The measuring device for loose asphalt concrete pavement thickness according to claim 1, characterized in that: The measuring component (22) also includes a fixed frame (229) fixedly connected to the top of the lifting support plate (223). The fixed frame (229) is symmetrically fixedly connected to a shock absorber (2291), and a shock absorber extension spring (2292) is sleeved on the outer surface of the shock absorber (2291).

4. The measuring device for loose asphalt concrete pavement thickness according to claim 3, characterized in that: The top of the damper (2291) is threaded with a connector (2293), and the top of the damper (2291) is threaded with a data processor (2294) via the connector (2293). The data processor (2294) is threaded to the top of the damper (2291) via the connector (2293).

5. The measuring device for loose asphalt concrete pavement thickness according to claim 1, characterized in that: The adjustment component (23) includes a servo motor (233) fixedly connected inside the support frame (21), a rotating threaded rod (231) fixedly connected to the output end of the servo motor (233), and two sliding blocks (234) threadedly connected at intervals on the outer surface of the rotating threaded rod (231), and a limiter (235) threadedly connected to the outer surface of the sliding block (234).

6. The measuring device for loose asphalt concrete pavement thickness according to claim 5, characterized in that: One end of the lifting support plate (223) is threaded to the outer surface of the top sliding block (234) through a limiting member (235), the bottom of the bottom inclined support plate (232) is threaded to the outer surface of the bottom sliding block (234) through a limiting member (235), and the top of the bottom inclined support plate (232) is threaded to the bottom of the bottom inclined support plate (232).

7. The measuring device for loose asphalt concrete pavement thickness according to claim 1, characterized in that: The stabilizing moving mechanism (3) includes an insertion through hole (31) opened on the top of the stabilizing base plate (1). The insertion through hole (31) and the measuring insertion rod (225) are located on the same central axis. The stabilizing moving mechanism (3) also includes an adjuster (32) threaded to the edge of the outer surface of the stabilizing base plate (1). The bottom of the adjuster (32) is rotatably connected to a bearing (33). The outer surface of the bearing (33) is fixedly connected to a stabilizing base (34). The stabilizing moving mechanism (3) also includes moving wheels (35) fixedly connected to the four corners of the bottom of the stabilizing base plate (1).

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