Concrete pavement flatness detection device

Abstract

The utility model discloses a concrete pavement flatness detection device, which comprises a main detection arm arranged along the horizontal direction, two ends of the main detection arm are respectively hinged with an auxiliary detection arm through a rotating shaft, a fixed seat fixedly connected with the main detection arm is arranged above the main detection arm, and a swing oil cylinder is arranged between the auxiliary detection arm and the fixed seat; laser ranging heads are mounted at the side parts of the main detection arm and the auxiliary detection arm, the scanning ends of the laser ranging heads are arranged towards one side far away from the main detection arm and the auxiliary detection arm, and the laser ranging heads reciprocate along the length directions of the main detection arm and the auxiliary detection arm; the main detection arm and the auxiliary detection arm are both of a hollow structure, and power transmission mechanisms capable of driving the laser ranging head to reciprocate are installed in the main detection arm and the auxiliary detection arm. According to the flatness detection device provided by the utility model, the detection width can be adaptively adjusted according to the width of a road surface, and the problem that detection cannot be carried out or measurement is inaccurate due to the fact that the width of the road surface is too narrow or too wide is avoided.

Description

Technical Field

[0001] This utility model relates to a concrete pavement smoothness testing device, belonging to the field of pavement smoothness testing technology. Background Technology

[0002] Road surface smoothness refers to the deviation of the longitudinal unevenness of the road surface. It is an important indicator in road evaluation and road construction acceptance. It mainly reflects the smoothness of the longitudinal profile curve of the road surface. When the longitudinal profile curve of the road surface is relatively smooth, it means that the road surface is relatively smooth or the smoothness is relatively good. Conversely, it means that the smoothness is relatively poor.

[0003] Currently, the main methods for road surface smoothness testing include the three-meter straightedge test, continuous smoothness meter, and vehicle-mounted bump integrator. The continuous smoothness meter uses a distance sensor installed on a moving vehicle to continuously detect the displacement of the road surface to obtain longitudinal profile data, thereby characterizing the road surface smoothness. It features strong continuous measurement capability, high measurement accuracy, high efficiency, reliable and comprehensive data, relatively simple operation, and wide application.

[0004] Existing continuous flatness gauges still have the following technical problems, based on practical experience:

[0005] The detectable width of a road surface smoothness meter is relatively fixed and cannot be adaptively adjusted according to the road surface width. In some extreme cases, such as when the road surface width is too narrow or too wide, the smoothness meter may not be able to adapt and may lead to inaccurate measurements.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] This invention addresses the shortcomings of the prior art by providing a concrete pavement smoothness testing device that can adaptively adjust the testing width according to the pavement width, avoiding problems such as inability to detect or inaccurate measurement due to excessively narrow or wide pavement widths.

[0008] To solve the above technical problems, the present invention adopts the following technical solution:

[0009] A concrete pavement smoothness testing device includes a main testing arm arranged in a horizontal direction, with auxiliary testing arms hinged to both ends of the main testing arm via rotating shafts, and a fixed base fixedly connected to the main testing arm above it; a swing cylinder is installed between the auxiliary testing arm and the fixed base.

[0010] Both the main detection arm and the auxiliary detection arm are equipped with laser rangefinders on their sides. The scanning end of the laser rangefinder is positioned away from the main detection arm and the auxiliary detection arm. The laser rangefinder reciprocates along the length of the main detection arm and the auxiliary detection arm.

[0011] Both the main detection arm and the auxiliary detection arm are hollow structures, and a power transmission mechanism that can drive the laser rangefinder head to reciprocate is installed inside both the main detection arm and the auxiliary detection arm.

[0012] Furthermore, the swing angle between the secondary detection arm and the main detection arm ranges from 0° to 90°.

[0013] Furthermore, the length of the secondary detection arm is less than the length of the primary detection arm.

[0014] Furthermore, the mounting base is provided with a connecting plate, which is fixedly connected to the front or rear end of the vehicle.

[0015] Furthermore, the tail of the swing cylinder is hinged to the fixed seat, and the head of the swing cylinder is connected to the auxiliary detection arm through the ear seat, which is fixed to the end of the auxiliary detection arm near the main detection arm.

[0016] Furthermore, the number of the swing cylinders is two, arranged symmetrically.

[0017] Furthermore, the power transmission mechanism includes a ball screw, which is installed inside the main detection arm and the auxiliary detection arm, and both ends of the ball screw are rotated and supported by bearing seats.

[0018] Furthermore, a nut is installed on the main body of the ball screw, and the nut is fixedly connected to the laser rangefinder.

[0019] Furthermore, the end of the ball screw is connected to a motor, which is a forward and reverse stepper motor.

[0020] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0021] This invention can adjust the detectable width formed by the main detection arm and the auxiliary detection arm according to the width of the road surface. By adaptively adjusting the detection width, it avoids the problem of being unable to detect or having inaccurate measurements due to the road surface being too narrow or too wide.

[0022] The detectable width formed by this utility model has three specifications: the first is that the laser rangefinders at the bottom of the main detection arm and the two auxiliary detection arms are in a reciprocating motion state; the second is that the laser rangefinders at the bottom of the main detection arm and one of the auxiliary detection arms are in a reciprocating motion state; and the third is that only the laser rangefinder at the bottom of the main detection arm is in a reciprocating motion state.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0026] Figure 3 This is a diagram showing the usage state of this utility model.

[0027] In the diagram, 1-main detection arm, 2-fixed seat, 3-connecting plate, 4-auxiliary detection arm, 5-rotating shaft, 6-ear seat, 7-swing cylinder, 8-ball screw, 9-bearing seat, 10-nut, 11-laser rangefinder head, 12-motor. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0029] like Figures 1-3 As shown in the figure, this utility model provides a concrete pavement smoothness testing device, including a main testing arm 1 arranged in the horizontal direction, and auxiliary testing arms 4 respectively hinged to the two ends of the main testing arm 1 through a rotating shaft 5. The auxiliary testing arms 4 can swing along the rotating shaft 5, and the swing angle of the auxiliary testing arms 4 is 0°-90°.

[0030] The length of the secondary detection arm 4 is less than the length of the main detection arm 1.

[0031] The main detection arm 1 is equipped with a fixed base 2 above it, which is fixedly connected to the main detection arm 1. A connecting plate 3 is provided on the fixed base 2, and the connecting plate 3 is fixedly connected to the front or rear end of the vehicle. The vehicle drives the entire detection device to move forward, and the smoothness of the concrete road surface is detected during the movement.

[0032] A swing cylinder 7 is installed between the auxiliary detection arm 4 and the fixed base 2. The tail of the swing cylinder 7 is hinged to the fixed base 2, and the head of the swing cylinder 7 is connected to the auxiliary detection arm 4 through the ear seat 6. The ear seat 6 is fixed to the end of the auxiliary detection arm 4 near the main detection arm 1.

[0033] There are two swing cylinders 7 arranged symmetrically. The swing cylinders 7 provide power for the rotation of the auxiliary detection arm 4 along the rotating shaft 5. The two swing cylinders 7 can work synchronously or independently.

[0034] Both the main detection arm 1 and the auxiliary detection arm 4 are equipped with laser rangefinders 11 on their sides. The scanning end of the laser rangefinder 11 is set away from the main detection arm 1 and the auxiliary detection arm 4. The laser rangefinder 11 can reciprocate along the length of the main detection arm 1 and the auxiliary detection arm 4.

[0035] Both the main detection arm 1 and the auxiliary detection arm 4 are hollow structures, and a power transmission mechanism that can drive the laser rangefinder head 11 to reciprocate is installed inside both the main detection arm 1 and the auxiliary detection arm 4.

[0036] The power transmission mechanism includes a ball screw 8, which is installed inside the main detection arm 1 and the auxiliary detection arm 4. Both ends of the ball screw 8 are rotated and supported by bearing seats 9. A nut 10 is installed on the main body of the ball screw 8, and the nut 10 is fixedly connected to the laser rangefinder head 11.

[0037] The end of the ball screw 8 is connected to the motor 12, which is a forward and reverse stepper motor. The motor 12 drives the ball screw 8 to rotate within the bearing housing 9, thereby sequentially driving the nut 10 and the laser rangefinder head 11 to reciprocate along the ball screw 8.

[0038] The specific working principle of this utility model is as follows:

[0039] The entire device is installed on the front or rear of the vehicle. Then, the detectable width formed by the main detection arm 1 and the auxiliary detection arm 4 is adjusted according to the width of the road surface to adapt the detectable width to the road surface width. Then, the vehicle drives the entire detection device to move forward. During the movement, the laser rangefinder 11 measures continuous point data to evaluate the smoothness of the entire road surface.

[0040] The detectable width formed by this utility model has three specifications:

[0041] The first method involves two swing cylinders 7 extending synchronously to bring the main detection arm 1 and the two auxiliary detection arms 4 into a horizontal state, with the laser rangefinder 11 at the bottom of the main detection arm 1 and the two auxiliary detection arms 4 in a reciprocating motion state.

[0042] The second type is a swing cylinder 7 that extends, the main detection arm 1 and a secondary detection arm 4 are in a horizontal state, and the laser rangefinder 11 at the bottom of the main detection arm 1 and the secondary detection arm 4 is in a reciprocating motion state.

[0043] The third type is where both swing cylinders 7 are in the extension and retraction state, and only the laser rangefinder 11 at the bottom of the main detection arm 1 is in the reciprocating motion state.

[0044] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A device for detecting the flatness of a concrete pavement, characterized in that: The utility model relates to a kind of laser ranging vehicle detection device, including the main detection arm (1) arranged in horizontal direction, the both ends of main detection arm (1) are respectively hinged with auxiliary detection arm (4) by pivot (5), fixed seat (2) is fixedly connected above main detection arm (1), swing oil cylinder (7) is installed between auxiliary detection arm (4) and fixed seat (2); The side of the main detection arm (1) and the auxiliary detection arm (4) is provided with a laser ranging head (11), and the scanning end of the laser ranging head (11) is arranged away from the main detection arm (1) and the auxiliary detection arm (4). The laser ranging head (11) reciprocates along the length direction of the main detection arm (1) and the auxiliary detection arm (4). The main detection arm (1) and the auxiliary detection arm (4) are hollow structures, and the power transmission mechanism for driving the laser ranging head (11) to reciprocate is installed inside the main detection arm (1) and the auxiliary detection arm (4).

2. The concrete pavement flatness detection device of claim 1, wherein: The swing angle between the auxiliary detection arm (4) and the main detection arm (1) ranges from 0° to 90°.

3. The concrete pavement flatness detection device of claim 1, wherein: The length of the auxiliary detection arm (4) is less than the length of the main detection arm (1).

4. The concrete pavement flatness detection device of claim 1, wherein: The fixed seat (2) is provided with a connecting plate (3), and the connecting plate (3) is fixedly connected to the front end or the rear end of the vehicle.

5. The concrete pavement flatness detection device of claim 1, wherein: The tail of the swing oil cylinder (7) is hingedly connected to the fixed seat (2), and the head of the swing oil cylinder (7) is connected to the auxiliary detection arm (4) through an ear seat (6), and the ear seat (6) is fixedly connected to the end of the auxiliary detection arm (4) close to the main detection arm (1).

6. The concrete pavement flatness detection device of claim 1, wherein: The number of swing oil cylinders (7) is two, and they are symmetrically arranged.

7. The concrete pavement flatness detection device of claim 1, wherein: The power transmission mechanism includes a ball screw (8), which is arranged inside the main detection arm (1) and the auxiliary detection arm (4). The both ends of the ball screw (8) are rotatably supported by a bearing seat (9).

8. The concrete pavement flatness detection device of claim 7, wherein: A nut (10) is installed on the main body of the ball screw (8), and the nut (10) is fixedly connected to the laser ranging head (11).

9. The concrete pavement flatness detection device of claim 8, wherein: The end of the ball screw (8) is connected to a motor (12), and the motor (12) is a positive and negative stepping motor.

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