Highway bridge flatness detection equipment and detection method

Abstract

The present application relates to the technical field of road surface detection, and in particular to a highway bridge smoothness detection device and detection method. The highway bridge smoothness detection device includes a frame, running wheels provided on the frame, and a rigid detection beam provided on the frame. The rigid detection beam is provided with a detection mechanism, the detection mechanism includes a system power supply and a laser probe group connected to the system power supply. The laser probe group includes at least five laser probes, and the laser probes are spaced at proportional distances from each other to form a small-step and large-step bisymmetrical system with step sizes δ and Nδ, respectively. The device also includes a control mechanism, the control mechanism including a controller and a touch screen display, the touch screen display and the laser probes being connected to the controller. The highway bridge smoothness detection device based on the bisymmetrical system is not limited by the detection speed and accurately detects the smoothness of the road being tested.

Description

Technical Field

[0001] The present application relates to the technical field of road surface detection, and in particular to a road bridge smoothness detection device and detection method. Background Art

[0002] Road surface smoothness is an important indicator that must be checked during road construction, quality acceptance, and maintenance management. It directly affects driving comfort and safety.

[0003] Currently, the instruments and equipment used for road roughness testing in this field mainly include levels, three-meter rulers, eight-wheel roughness meters, bump accumulation meters, and laser roughness meters. Among them, the laser roughness meter is the most commonly used road surface roughness testing instrument in this field, with its notable features of fast detection speed and high accuracy.

[0004] Laser roughness testers generally use the inertial principle, that is, in the detection system, inertial elements (accelerometers) are used to correct the vibration of the vehicle itself. The disadvantage of this method is that due to the frequency response, the driving speed cannot be lower than 30 (km / h -1 ), meaning it cannot be used at low speeds, which is a major drawback for practical road applications. During road inspections, vehicles often need to slow down due to maintenance and construction. Especially when inspecting on trunk roads, the inspection speed is sometimes very slow, which cannot meet the instrument's operating conditions. Summary of the Invention

[0005] In order to solve the above problems, the present application provides a highway bridge flatness detection device and detection method.

[0006] In the first aspect, the present application provides a road bridge flatness detection device, which adopts the following technical solution:

[0007] A highway bridge smoothness testing device includes a vehicle frame, running wheels mounted on the vehicle frame, and a rigid testing beam mounted on the vehicle frame. The rigid testing beam is provided with a testing mechanism, the testing mechanism including a system power supply and a laser probe group connected to the system power supply. The laser probe group includes at least five laser probes, the laser probes being spaced at proportional distances from one another to form a bisymmetrical system with small and large step lengths, δ and Nδ, respectively.

[0008] It also includes a control mechanism, which includes a controller and a touch screen display. The touch screen display and the laser probe are both connected to the controller.

[0009] By adopting the above technical solution, the highway bridge smoothness detection equipment based on the dual-symmetric system is not limited by the detection speed and can accurately detect the smoothness of the tested road.

[0010] Optionally, the laser probe group includes at least three first laser probes and at least two second laser probes, and the at least three first laser probes are evenly distributed to form a large-step-length bisymmetrical system with a step length of Nδ; the second laser probes are arranged at both ends of any first laser probe to form a small-step-length bisymmetrical system with a step length of δ.

[0011] Optionally, the frame is provided with a base plate which is rotated by a rotating shaft, and the base plate is used to install a touch display screen. A rotating shaft component is provided at one end of the base plate away from the rotating shaft and on the back side of the base plate. The base plate is connected to a support plate through the rotating shaft component, and the support plate can form any angle with the base plate around the rotating shaft component.

[0012] Optionally, the rotating shaft component includes a hinge, an upper leaf of the hinge is connected to the bottom plate, and a lower leaf of the hinge is integrally connected to the support plate.

[0013] Optionally, a cleaning mechanism is provided on the rigid detection beam and in front of the detection mechanism. The cleaning mechanism includes a brush roller and a fixing assembly for fixing the brush roller. The brush roller is arranged along the width direction of the frame, and the middle height of the brush roller is lower than the height at both ends.

[0014] Optionally, the brush roller includes a roller and brushes spirally arranged on the roller, and rubber blocks are evenly distributed between two adjacent rows of brushes.

[0015] Optionally, the fixing assembly includes a fixing frame and a sliding frame, wherein the fixing frame and the sliding frame are provided with positioning holes for the roller to extend therein, and the sliding frame is provided at an end of the roller away from the fixing frame and is slidingly provided with the rigid detection beam;

[0016] The bottom surfaces of the fixed frame and the sliding frame are higher than the middle height of the brush roller.

[0017] In a second aspect, the present application provides a method for detecting the smoothness of a highway bridge, which adopts the following technical solution:

[0018] A method for detecting the smoothness of a highway bridge, based on the highway bridge smoothness detection device described in the first aspect, comprises:

[0019] The tractor drives the inspection equipment to move. Under the action of external force, the brush on the brush roller contacts the road surface and cleans away impurities such as stones on the road surface.

[0020] The laser probe group detects the road surface and sends the collected data to the controller;

[0021] The controller can directly calculate the international flatness index based on the data collected by the laser probe.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The tractor drives the testing equipment to move. Driven by external force, the brushes on the brush roller come into contact with the road surface, removing impurities such as stones on the road surface. The laser probe group detects the road surface and sends the collected data to the controller. The controller can directly calculate the international roughness index based on the data collected by the laser probe.

[0024] 2. The highway bridge smoothness detection equipment based on the double-symmetric system is not limited by the detection speed and can accurately detect the smoothness of the tested road. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a highway bridge smoothness detection device shown in one embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram of a highway bridge flatness detection device shown in one embodiment of the present application.

[0027] Explanation of the accompanying symbols: 1. Frame; 2. Travel wheel; 3. Rigid detection beam; 4. Detection mechanism; 5. First laser probe; 6. Second laser probe; 7. Bottom plate; 8. Support plate; 9. Brush roller. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-2 This application is described in further detail.

[0029] The present application embodiment discloses a road bridge flatness detection device, such as Figure 1 As shown, it includes a frame 1, running wheels 2 arranged on the frame 1, a rigid detection beam 3 arranged on the frame 1, and a control mechanism. A detection mechanism 4 is provided on the rigid detection beam 3. In order to reduce the deformation of the rigid detection beam 3 caused by road bumps, vibrations, and impacts during driving detection, the rigid detection beam 3 is suspended in the middle of the frame 1 by a spring.

[0030] Among them, the detection mechanism includes a system power supply and a laser probe group connected to the system power supply. The laser probe group includes at least five laser probes, and the laser probes are spaced at proportional distances from each other to form a small-step and large-step bisymmetrical system with step sizes of δ and Nδ respectively.

[0031] Specifically, the laser probe group includes at least three first laser probes 5 and at least two second laser probes 6. Each of the first laser probes 5 and the second laser probes 6 can emit a detection laser beam downward. The at least three first laser probes 5 are evenly distributed, with adjacent intervals N (N>2), forming a large-step symmetrical system with a step length of Nδ. The second laser probes 6 are arranged at both ends of any first laser probe 5, with adjacent intervals δ, forming a small-step symmetrical system with a step length of δ.

[0032] For example, combining Figure 2 There are three first laser probes 5, namely 1, 3, and 5; there are two second laser probes 6, namely 2 and 4.

[0033] The control mechanism includes a controller connected to the laser probe. Data collected by the laser probe is transmitted to the controller for storage, detection, and processing. Based on the data collected by the laser probe, the controller can directly calculate the International Roughness Index and analyze the road surface relative to the longitudinal profile.

[0034] The large-step and small-step systems each produce elevation curves for the same longitudinal section using different step sizes. However, the large-step symmetric system can only produce pavement wavelengths greater than 2Nδ, failing to provide more accurate elevation information for a specific part of the longitudinal section. The small-step symmetric system, on the other hand, can produce pavement longitudinal section information with wavelengths greater than 2δ. Due to measurement errors, the accumulated errors increase exponentially with increasing mileage. Therefore, the final relative longitudinal section should be constructed by superimposing large and small step sizes, with the measurement interval determined by the small step size δ.

[0035] Based on the relative elevations of the superimposed large and small steps, the relative elevation of the longitudinal section of the road being tested can be calculated. Then, according to the solution method of the vibration equation of the 1 / 4 vehicle mathematical model, the flatness index of the road being tested can be obtained.

[0036] The reference transmission system based on the double-symmetrical structure eliminates the influence of vehicle bumps and vibrations. At the same time, since there are no inertial elements, the measurement results are independent of the driving speed during measurement.

[0037] The control mechanism also includes a touch screen display, which is connected to the controller and is used to display the calculated international roughness index and the elevation curve of the same longitudinal section.

[0038] It should be noted that the frame 1 is provided with a base plate 7 rotatably mounted on a rotating shaft. The base plate 7 is used to mount the touch screen display. A rotating shaft component is provided at one end of the base plate 7, away from the rotating shaft and located on the back of the base plate 7. The base plate 7 is connected to a support plate 8 via the rotating shaft component. The support plate 8 can be adjusted to any angle relative to the base plate 7 around the rotating shaft component, thereby adjusting the angle of the touch screen display to facilitate viewing by staff. Specifically, the rotating shaft component can be configured as a hinge, with the upper leaf of the hinge connected to the base plate 7 and the lower leaf of the hinge integrally connected to the support plate 8.

[0039] In addition, a cleaning mechanism is provided on the rigid detection beam 3, located in front of the detection mechanism 4. This cleaning mechanism includes a brush roller 9 and a fixing assembly for securing the brush roller 9. The brush roller 9 is arranged along the width of the vehicle frame 1, with the middle portion of the brush roller 9 being lower than the ends. Specifically, the brush roller 9 includes a shaft and brushes spirally mounted on the shaft. Rubber blocks are evenly distributed between adjacent rows of brushes to enhance cleaning effectiveness. Furthermore, cleaning the road surface during the detection process helps improve detection accuracy.

[0040] The fixed assembly includes a fixed frame and a sliding frame. Both the fixed frame and the sliding frame are equipped with positioning holes for the roller to extend into. The bottom height of the fixed frame and the sliding frame is higher than the mid-height of the brush roller 9, facilitating contact between the brush roller 9 and the road surface. The sliding frame is positioned at the end of the roller away from the fixed frame and is slidably mounted with the rigid detection beam 3. Specifically, a slide groove is provided on the rigid detection beam 3 along the axial direction of the brush roller 9. The sliding frame is equipped with a slider that slidably connects to the slide groove. The slider is secured to the rigid detection beam 3 by bolts.

[0041] The implementation principle of a highway bridge smoothness detection device in the embodiment of the present application is as follows:

[0042] The detection equipment is moved by a tractor. Driven by an external force, the brush on the brush roller 9 contacts the road surface and cleans away impurities such as stones on the road surface. At this time, the laser probe group detects the road surface and sends the collected data to the controller, which can directly calculate the international roughness index based on the data collected by the laser probe.

[0043] Based on the above-mentioned highway bridge flatness detection device, the embodiment of the present application further discloses a highway bridge flatness detection method, including:

[0044] The tractor drives the inspection equipment to move. Under the action of external force, the brush on the brush roller contacts the road surface and cleans away impurities such as stones on the road surface.

[0045] The laser probe group detects the road surface and sends the collected data to the controller;

[0046] The controller can directly calculate the international flatness index based on the data collected by the laser probe.

[0047] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A road bridge flatness detection device, characterized by: The invention comprises a vehicle frame (1), a running wheel (2) arranged on the vehicle frame (1), and a rigid detection beam (3) arranged on the vehicle frame (1); a detection mechanism (4) is arranged on the rigid detection beam (3); the detection mechanism (4) comprises a system power supply and a laser probe group connected to the system power supply; the laser probe group comprises at least five laser probes, and the laser probes are spaced at proportional distances from each other, forming step lengths of and Small-step and large-step bisymmetric systems; It also includes a control mechanism, which includes a controller and a touch screen display, and the touch screen display and the laser probe are both connected to the controller; The laser probe group comprises at least three first laser probes (5) and at least two second laser probes (6), wherein the at least three first laser probes (5) are evenly distributed to form a step length of The second laser probe (6) is arranged at both ends of any first laser probe (5), forming a large step length of The large-step-length bisymmetric system and the small-step-length bisymmetric system give the elevation curves of the same longitudinal section with different step sizes. The frame (1) is provided with a base plate (7) which is rotatable via a rotating shaft. The base plate (7) is used to install a touch display screen. A rotating shaft component is provided at one end of the base plate (7) away from the rotating shaft and on the back side of the base plate (7). The base plate (7) is connected to a support plate (8) via the rotating shaft component. The support plate (8) can be formed at any angle with the base plate (7) around the rotating shaft component. The rotating shaft component includes a hinge, the upper leaf of the hinge is connected to the bottom plate (7), and the lower leaf of the hinge is connected to the support plate (8) as a whole; A cleaning mechanism is provided on the rigid detection beam (3) and located in front of the detection mechanism (4). The cleaning mechanism comprises a brush roller (9) and a fixing assembly for fixing the brush roller (9). The brush roller (9) is provided along the width direction of the vehicle frame (1). The middle height of the brush roller (9) is lower than the heights at both ends.

2. The road bridge smoothness detection device according to claim 1, characterized in that: The brush roller (9) comprises a roller and brushes spirally arranged on the roller, and rubber blocks are evenly distributed between two adjacent rows of brushes.

3. The road bridge smoothness detection device according to claim 2, characterized in that: The fixing assembly comprises a fixing frame and a sliding frame, wherein the fixing frame and the sliding frame are provided with positioning holes for the roller to extend into, and the sliding frame is provided at an end of the roller away from the fixing frame and is slidingly provided with the rigid detection beam (3); The bottom surfaces of the fixed frame and the sliding frame are higher than the middle height of the brush roller (9).

4. A method for detecting the smoothness of a highway bridge, characterized in that: The road bridge smoothness detection device according to any one of claims 1 to 3 comprises: The tractor drives the detection equipment to move, and under the action of external force, the brush on the brush roller (9) contacts the road surface to clean the impurities on the road surface; The laser probe group detects the road surface and sends the collected data to the controller; the controller directly calculates the international roughness index based on the data collected by the laser probe.

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