Pavement flatness measuring device for engineering construction

Abstract

The invention relates to the technical field of engineering construction, and particularly discloses a pavement flatness measuring device for engineering construction, which comprises an eight-wheel instrument for measuring the flatness of a pavement; the detection mechanism is installed in the eight-wheel instrument support, and the detection mechanism detects the friction coefficient of the road surface before the device runs; the road surface friction coefficient is detected in advance through the adjusting mechanism, the adjusting mechanism dynamically adjusts the position of a pressure sensor and the ground clearance of a detection wheel according to the friction coefficient, and a fixed motor is started to drive a rotating ring to rotate through a rotating roller and a synchronous belt to drive a second lead screw to rotate; the movement of the second moving member can drive the eight-wheel instrument supporting seat to move up and down, thereby adjusting the ground clearance of the detection wheel, effectively compensating the data deviation caused by the wear of the detection wheel, and improving the accuracy and stability of the measurement result.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction, and specifically relates to a device for measuring the evenness of a road surface in engineering construction. Background Art

[0002] During the process of road engineering construction, the evenness of the road surface is one of the key indicators for measuring the quality of the project, directly affecting the comfort, safety of vehicle driving and the service life of the road surface. At present, commonly used road surface evenness measuring devices such as the eight-wheel instrument often only detect the evenness of the road surface singly during the measurement process, ignoring the interference of factors such as the road surface friction coefficient and slope on the measurement results. For example, road surfaces with different friction coefficients will cause different contact pressures and wear degrees between the measurement wheel and the road surface, thus affecting the accuracy of the data collected by the pressure sensor; on uphill and downhill sections, due to the action of gravity, the pressure on the measurement wheel changes, which will also lead to measurement errors.

[0003] Existing road surface evenness measuring devices for engineering construction are inconvenient to deal with these interference factors, resulting in large deviations in measurement results and being difficult to meet the quality inspection requirements of high-precision engineering construction. Therefore, we propose a device for measuring the evenness of a road surface in engineering construction. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for measuring the evenness of a road surface in engineering construction to solve the problem that during the measurement process, only the evenness of the road surface is detected singly, ignoring the interference of factors such as the road surface friction coefficient and slope on the measurement results as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A device for measuring the evenness of a road surface in engineering construction, comprising: an eight-wheel instrument, The eight-wheel instrument measures the evenness of the road surface; A detection mechanism, which is installed in the eight-wheel instrument bracket, and the detection mechanism detects the friction coefficient of the road surface before the device runs; An adjustment mechanism, which is installed in the eight-wheel instrument bracket, and the adjustment mechanism controls the position of the pressure sensor of the eight-wheel instrument and the ground clearance of the detection wheel of the eight-wheel instrument according to the detected friction coefficient of the detection mechanism. When the road surface friction coefficient increases, the position of the pressure sensor gradually moves down as the moving path of the eight-wheel instrument increases, for compensating the data deviation caused by the movement and wear of the detection wheel of the eight-wheel instrument; A judgment mechanism, which is installed in the eight-wheel instrument bracket, and the judgment mechanism judges the uphill and downhill angles of the road surface. The judgment mechanism adjusts the position of the pressure sensor according to the road surface slope. When in a downhill section, the pressure between the pressure sensor and the detection wheel of the eight-wheel instrument is adaptively reduced according to the slope size, and when in an uphill section, the pressure between the pressure sensor and the detection wheel of the eight-wheel instrument is adaptively increased according to the slope size.

[0006] Among them, the detection mechanism includes a first lead screw rotatably connected inside the eight-wheel instrument bracket. One end of the first lead screw is fixedly connected with a first rotating member. The surface of the first lead screw is slidably connected with a first moving member. One end of the first moving member is fixedly connected with a connecting member. A resistance sensor is arranged inside the connecting member. One end of the connecting member close to the resistance sensor is fixedly connected with a first connecting rod. One end of the first connecting rod is fixedly connected with a friction plate.

[0007] Among them, the adjustment mechanism includes a fixed motor fixedly connected inside the eight-wheel instrument bracket. The output end of the fixed motor is fixedly connected with a rotating roller. One end of the rotating roller is rotatably connected with a second rotating member. A synchronous belt is sleeved on the surface of the second rotating member. One side inside the synchronous belt is sleeved with a rotating ring. The top of the rotating ring is fixedly connected with a fixed sleeve. The fixed sleeve is rotatably connected inside the eight-wheel instrument bracket. A second lead screw is fixedly connected inside the fixed sleeve. The surface of the second lead screw is slidably connected with a second moving member. One end of the second moving member is fixedly connected with a second connecting rod. The second connecting rod is fixedly connected to the upper part of the eight-wheel instrument support base.

[0008] Among them, one side of the eight-wheel instrument support base is fixedly connected with an arc-shaped plate. An electromagnet is arranged inside the arc-shaped plate. The surface of the electromagnet is fixedly connected with a synchronous rod. The synchronous rod is fixedly connected to the surface of the eight-wheel instrument pressure sensor. One end of the synchronous rod is fixedly connected with a compression spring. The compression spring is fixedly connected inside the arc-shaped plate.

[0009] Among them, the judgment mechanism includes a placement groove fixedly connected inside the eight-wheel instrument bracket. A fixed tube is fixedly connected inside the placement groove. A moving ball is slidably connected inside the fixed tube. An infrared sensor is fixedly connected to one side of the placement groove close to the fixed tube.

[0010] Among them, a switching mechanism is arranged at the bottom of the eight-wheel instrument bracket. The switching mechanism switches between the surface of the rotating roller and the first rotating member and the second rotating member.

[0011] Among them, the switching mechanism includes a placement box fixedly connected to the bottom of the eight-wheel instrument bracket. An electric push rod is fixedly connected inside the placement box. One end of the electric push rod is fixedly connected with a moving plate. One end of the moving plate is rotatably connected with a restricting member. One side of the restricting member is fixedly connected with a fixed spring. One end of the fixed spring is fixedly connected with a restricting block. A first empty groove adapted to the restricting block is opened on one side of the restricting member.

[0012] Among them, the first rotating member is rotatably connected to the surface of the rotating roller. A second empty groove adapted to the restricting member is opened inside the first rotating member.

[0013] Among them, the restricting member is slidably connected to the surface of the rotating roller. A sliding groove adapted to the restricting member is opened on the surface of the rotating roller.

[0014] Wherein, one side of the octometer support is fixedly connected with a placement plate, and a control device is fixedly connected inside the placement plate.

[0015] The present invention has at least the following beneficial effects: Through the adjustment mechanism of the present invention, the road surface friction coefficient is detected in advance. The adjustment mechanism dynamically adjusts the position of the pressure sensor and the ground clearance of the detection wheel according to the friction coefficient. The fixed motor starts to drive the rotating ring to rotate through the rotating roller and the synchronous belt, drives the second lead screw to rotate, and drives the octometer support seat to move up and down through the movement of the second moving member, so as to adjust the ground clearance of the detection wheel, effectively compensating for the data deviation caused by the wear of the detection wheel, and improving the accuracy and stability of the measurement result; Through the judgment mechanism of the present invention, the road surface slope is monitored in real time, and the pressure between the pressure sensor and the detection wheel is automatically adjusted according to the slope, eliminating the interference of the slope on the measurement result, and making the measurement data more truly reflect the actual situation of the road surface flatness.

[0016] Through the switching mechanism of the present invention, the switching mechanism realizes the power connection switching between the rotating roller and different mechanisms, improves the function integration degree and use flexibility of the device, meets the requirements of various measurement scenarios. At the same time, the control device realizes the automatic control of the whole measurement process, with simple operation and greatly improves the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional schematic diagram of the present invention; Figure 2 is a front view schematic diagram of the present invention; Figure 3 is a top view schematic diagram of the present invention; Figure 4 is a partial sectional view schematic diagram of the octometer of the present invention; Figure 5 is a plan view schematic diagram of the detection mechanism of the present invention; Figure 6 is a top view schematic diagram of the switching mechanism of the present invention; Figure 7 is a schematic diagram at position A of the present invention; Figure 8 is a schematic diagram at position B of the present invention; Figure 9 is a schematic diagram at position C of the present invention.

[0018] In the figure: 1. Octowheel instrument; 2. Detection mechanism; 21. First lead screw; 22. First rotating part; 23. First moving part; 24. Connecting part; 25. Resistance sensor; 26. First connecting rod; 27. Friction plate; 3. Adjusting mechanism; 31. Fixed motor; 32. Rotating roller; 33. Second rotating part; 34. Synchronous belt; 35. Rotating ring; 36. Fixed sleeve; 37. Second lead screw; 38. Second moving part; 39. Second connecting rod; 310. Arc plate; 311. Electromagnet; 312. Synchronous rod; 313. Compression spring; 4. Judgment mechanism; 41. Placing groove; 42. Fixed tube; 43. Moving ball; 44. Infrared sensor; 5. Switching mechanism; 51. Placing box; 52. Electric push rod; 53. Moving plate; 54. Restricting part; 55. Fixed spring; 56. Restricting block; 6. Placing plate; 7. Control device. Detailed implementation mode

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1 Please refer to Figures 1 to 9 , the present invention provides a technical solution: a road surface flatness measuring device for engineering construction, including: an octowheel instrument 1, The octowheel instrument 1 measures the flatness of the road surface; The detection mechanism 2 is installed in the bracket of the octowheel instrument 1, and the detection mechanism 2 detects the friction coefficient of the road surface before the device runs; The adjusting mechanism 3 is installed in the bracket of the octowheel instrument 1. The adjusting mechanism 3 controls the position of the pressure sensor of the octowheel instrument 1 and the ground clearance of the detection wheel of the octowheel instrument 1 according to the detected friction coefficient by the detection mechanism 2. When the road surface friction coefficient increases, the position of the pressure sensor gradually moves down as the moving path of the octowheel instrument 1 increases, so as to compensate for the data deviation caused by the movement wear of the detection wheel of the octowheel instrument 1; The judgment mechanism 4 is installed in the bracket of the octowheel instrument 1. The judgment mechanism 4 judges the uphill and downhill angles of the road surface. The judgment mechanism 4 adjusts the position of the pressure sensor according to the road surface slope. When in a downhill section, the pressure between the pressure sensor and the detection wheel of the octowheel instrument 1 is adaptively reduced according to the slope size. When in an uphill section, the pressure between the pressure sensor and the detection wheel of the octowheel instrument 1 is adaptively increased according to the slope size.

[0021] The detection mechanism 2 includes a first lead screw 21 rotatably connected inside the bracket of the eight-wheel instrument 1. One end of the first lead screw 21 is fixedly connected to a first rotating member 22. A first moving member 23 is slidably connected to the surface of the first lead screw 21. One end of the first moving member 23 is fixedly connected to a connecting member 24. A resistance sensor 25 is arranged inside the connecting member 24. One end of the connecting member 24 close to the resistance sensor 25 is fixedly connected to a first connecting rod 26. One end of the first connecting rod 26 is fixedly connected to a friction plate 27.

[0022] The detection mechanism 2 is installed inside the bracket of the eight-wheel instrument 1 to detect the friction coefficient of the road surface before the device runs. By rotating the first rotating member 22, the first lead screw 21 can be driven to rotate. When the first lead screw 21 rotates, the first moving member 23 can move along the axis direction of the lead screw. One end of the first moving member 23 is fixedly connected to a connecting member 24. The resistance sensor 25 arranged inside the connecting member 24 is used to detect the resistance generated when the friction plate 27 contacts the road surface. The resistance sensor 25 adopts a piezoresistive force sensor, which is convenient for detecting the magnitude of the force. The magnitude of this resistance is related to the road surface friction coefficient. The friction plate 27 is made of wear-resistant material and adapted to common road surface materials, and can stably contact the road surface to accurately detect the friction coefficient. During actual detection, by controlling the rotation of the first lead screw 21, the friction plate 27 is lowered to fit the road surface. As the eight-wheel instrument 1 moves, the resistance sensor 25 collects the resistance data of the friction plate 27 and transmits it to the control device 7 for processing to calculate the road surface friction coefficient.

[0023] The adjusting mechanism 3 includes a fixed motor 31 fixedly connected inside the bracket of the eight-wheel instrument 1. The output end of the fixed motor 31 is fixedly connected to a rotating roller 32. One end of the rotating roller 32 is rotatably connected to a second rotating member 33. A synchronous belt 34 is sleeved on the surface of the second rotating member 33. One side inside the synchronous belt 34 is sleeved with a rotating ring 35. The top of the rotating ring 35 is fixedly connected to a fixed sleeve 36. The fixed sleeve 36 is rotatably connected inside the bracket of the eight-wheel instrument 1. A second lead screw 37 is fixedly connected inside the fixed sleeve 36. A second moving member 38 is slidably connected to the surface of the second lead screw 37. One end of the second moving member 38 is fixedly connected to a second connecting rod 39. The second connecting rod 39 is fixedly connected to the upper part of the support seat of the eight-wheel instrument 1.

[0024] One side of the support seat of the eight-wheel instrument 1 is fixedly connected to an arc-shaped plate 310. An electromagnet 311 is arranged inside the arc-shaped plate 310. A synchronous rod 312 is fixedly connected to the surface of the electromagnet 311. The synchronous rod 312 is fixedly connected to the surface of the pressure sensor of the eight-wheel instrument 1. One end of the synchronous rod 312 is fixedly connected to a compression spring 313. The compression spring 313 is fixedly connected inside the arc-shaped plate 310.

[0025] The adjusting mechanism 3 is installed inside the bracket of the eight-wheel instrument 1. According to the magnitude of the friction coefficient detected by the detection mechanism 2, it controls the position of the pressure sensor of the eight-wheel instrument 1 and the ground clearance of the detection wheels of the eight-wheel instrument 1. After the fixed motor 31 is started, it drives the rotating roller 32 to rotate. The rotating ring 35 cooperates with the synchronous belt 34 to achieve transmission. When the rotating ring 35 rotates, it drives the second lead screw 37 to rotate. When the second lead screw 37 rotates, the second moving member 38 can move along the axis direction of the lead screw. Through the movement of the second moving member 38, it can drive the support base of the eight-wheel instrument 1 to move up and down, thereby adjusting the ground clearance of the detection wheels. When the road surface friction coefficient increases, the control device 7 controls the electromagnet 311 to be energized to generate magnetic force according to the preset algorithm, drives the pressure sensor to move down through the synchronous rod 312, and makes the position of the pressure sensor gradually move down as the movement path of the eight-wheel instrument 1 increases, so as to compensate for the data deviation caused by the movement wear of the detection wheels of the eight-wheel instrument 1 and ensure the accuracy of the measurement data.

[0026] The judging mechanism 4 includes a placement groove 41 fixedly connected inside the bracket of the eight-wheel instrument 1. A fixed tube 42 is fixedly connected inside the placement groove 41. A moving ball 43 is slidably connected inside the fixed tube 42. An infrared sensor 44 is fixedly connected to one side of the placement groove 41 close to the fixed tube 42.

[0027] The judging mechanism 4 is installed inside the bracket of the eight-wheel instrument 1, used to judge the uphill and downhill angles of the road surface and adjust the position of the pressure sensor according to the road surface slope. When the device is on road surfaces with different slopes, the moving ball 43 will roll inside the fixed tube 42 due to the action of gravity. The infrared sensor 44 obtains the road surface slope information by detecting the position change of the moving ball 43 and transmits the data to the control device 7. The control device 7, according to the preset program, when it judges that it is in a downhill section, adaptively reduces the magnetic force of the electromagnet 311 according to the slope magnitude, so that the compression spring 313 pushes the synchronous rod 312 to move up, reducing the magnitude of the pressure between the pressure sensor and the detection wheels of the eight-wheel instrument 1; when it is in an uphill section, it adaptively increases the magnetic force of the electromagnet 311 according to the slope magnitude, attracts the synchronous rod 312 to drive the pressure sensor to move down, increasing the magnitude of the pressure between the pressure sensor and the detection wheels of the eight-wheel instrument 1, thereby eliminating the influence of the slope on the measurement result.

[0028] A switching mechanism 5 is arranged at the bottom of the bracket of the eight-wheel instrument 1. The switching mechanism 5 switches between the surface of the rotating roller 32, the first rotating member 22 and the second rotating member 33.

[0029] The switching mechanism 5 includes a placement box 51 fixedly connected to the bottom of the bracket of the eight-wheel instrument 1. An electric push rod 52 is fixedly connected inside the placement box 51. One end of the electric push rod 52 is fixedly connected to a moving plate 53. One end of the moving plate 53 is rotatably connected to a restricting member 54. A fixing spring 55 is fixedly connected to one side of the restricting member 54. One end of the fixing spring 55 is fixedly connected to a restricting block 56. A first empty slot adapted to the restricting block 56 is provided on one side of the restricting member 54.

[0030] The first rotating member 22 is rotatably connected to the surface of the rotating roller 32. A second empty slot adapted to the restricting member 54 is provided inside the first rotating member 22.

[0031] The restricting member 54 is slidably connected to the surface of the rotating roller 32. A sliding groove adapted to the restricting member 54 is provided on the surface of the rotating roller 32.

[0032] The switching mechanism 5 is arranged at the bottom of the bracket of the eight-wheel instrument 1 and is used for switching between the surface of the rotating roller 32, the first rotating member 22, and the second rotating member 33. When the function needs to be switched, the electric push rod 52 pushes the moving plate 53, driving the restricting member 54 to slide along the sliding groove on the surface of the rotating roller 32, so that the restricting member 54 is engaged with or separated from the empty slot of the first rotating member 22 or the second rotating member 33, realizing the switching of the power connection between the rotating roller 32 and the detection mechanism 2 or the adjustment mechanism 3, and meeting different working requirements.

[0033] A placement plate 6 is fixedly connected to one side of the bracket of the eight-wheel instrument 1. A control device 7 is fixedly connected inside the placement plate 6.

[0034] The control device 7 is built-in with a microprocessor, a data processing module, a control module, etc., and is used for receiving the data collected by the detection mechanism 2 and the judgment mechanism 4, analyzing and processing them, and controlling the components such as the adjustment mechanism 3 and the switching mechanism 5 to work according to the preset algorithms and programs, realizing the automatic and intelligent operation of the entire measuring device.

[0035] Embodiment 2 As Figures 1 to 3 , in the second embodiment, other structures remain unchanged. Different from the first embodiment: A placement rack is provided at the top of the bracket of the eight-wheel instrument 1. The bracket of the eight-wheel instrument 1 fixes the position of the placement rack. When the eight-wheel instrument 1 moves, it can drive the placement rack to move. The placement rack can place the measuring device to ensure the stable position of the measuring device and prevent it from moving due to the influence of the road surface slope.

[0036] The above-mentioned electronic devices are all powered by an internal storage battery (not shown) or an external wire (not shown).

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road surface flatness measuring device for engineering construction, comprising: Octometer Octometer, which measures the flatness of the road surface Characterized in that Detection mechanism, which is installed inside the octometer bracket and detects the friction coefficient of the road surface before the device runs Adjustment mechanism, which is installed inside the octometer bracket. The adjustment mechanism controls the position of the wheel instrument pressure sensor and the ground clearance of the octometer detection wheel according to the detected friction coefficient. When the road surface friction coefficient increases, the position of the pressure sensor gradually moves down as the moving path of the octometer increases, to compensate for the data deviation caused by the movement wear of the octometer detection wheel Judgment mechanism, which is installed inside the octometer bracket and judges the uphill and downhill angles of the road surface. The judgment mechanism adjusts the position of the pressure sensor according to the road surface slope. When in a downhill section, it adaptively reduces the pressure between the pressure sensor and the octometer detection wheel according to the slope size. When in an uphill section, it adaptively increases the pressure between the pressure sensor and the octometer detection wheel according to the slope size 2. The pavement evenness measuring device for engineering construction according to claim 1, wherein: The detection mechanism includes a first lead screw rotatably connected inside the octometer bracket. One end of the first lead screw is fixedly connected to a first rotating member. The surface of the first lead screw is slidably connected to a first moving member. One end of the first moving member is fixedly connected to a connecting member. A resistance sensor is arranged inside the connecting member. One end of the connecting member close to the resistance sensor is fixedly connected to a first connecting rod. One end of the first connecting rod is fixedly connected to a friction plate 3. The pavement evenness measuring device for engineering construction according to claim 2, characterized in that: The adjustment mechanism includes a fixed motor fixedly connected inside the octometer bracket. The output end of the fixed motor is fixedly connected to a rotating roller. One end of the rotating roller is rotatably connected to a second rotating member. A synchronous belt is sleeved on the surface of the second rotating member. One side inside the synchronous belt is sleeved with a rotating ring. The top of the rotating ring is fixedly connected to a fixed sleeve. The fixed sleeve is rotatably connected inside the octometer bracket. A second lead screw is fixedly connected inside the fixed sleeve. The surface of the second lead screw is slidably connected to a second moving member. One end of the second moving member is fixedly connected to a second connecting rod. The second connecting rod is fixedly connected to the upper part of the octometer support 4. The road surface flatness measuring device for engineering construction according to claim 3, characterized in that: One side of the octometer support is fixedly connected to an arc-shaped plate. An electromagnet is arranged inside the arc-shaped plate. A synchronous rod is fixedly connected to the surface of the electromagnet. The synchronous rod is fixedly connected to the surface of the octometer pressure sensor. One end of the synchronous rod is fixedly connected to a compression spring. The compression spring is fixedly connected inside the arc-shaped plate 5. The pavement evenness measuring device for engineering construction according to claim 4, characterized in that: The judgment mechanism includes a placement groove fixedly connected inside the octometer bracket. A fixed pipe is fixedly connected inside the placement groove. A moving ball is slidably connected inside the fixed pipe. An infrared sensor is fixedly connected to one side of the placement groove close to the fixed pipe 6. The pavement evenness measuring device for engineering construction according to claim 5, characterized in that: A switching mechanism is arranged at the bottom of the octometer bracket, which switches between the surface of the rotating roller and the first rotating member and the second rotating member 7. The road surface flatness measuring device for engineering construction according to claim 6, wherein: The switching mechanism includes a placement box fixedly connected to the bottom of the eight-wheel instrument bracket. An electric push rod is fixedly connected inside the placement box. One end of the electric push rod is fixedly connected to a moving plate. One end of the moving plate is rotatably connected to a restricting member. One side of the restricting member is fixedly connected to a fixing spring. One end of the fixing spring is fixedly connected to a restricting block. A first empty slot adapted to the restricting block is formed on one side of the restricting member.

8. The pavement evenness measuring device for engineering construction according to claim 7, wherein: The first rotating member is rotatably connected to the surface of the rotating roller. A second empty slot adapted to the restricting member is formed inside the first rotating member.

9. The pavement evenness measuring device for engineering construction according to claim 8, characterized in that: The restricting member is slidably connected to the surface of the rotating roller. A sliding slot adapted to the restricting member is formed on the surface of the rotating roller.

10. The pavement evenness measuring device for engineering construction according to claim 1, wherein: One side of the eight-wheel instrument bracket is fixedly connected to a placement plate. A control device is fixedly connected inside the placement plate.

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