Pavement flatness testing device

Abstract

The invention relates to the field of pavement flatness detection, in particular to a pavement flatness testing device which comprises a straight ruler for measurement, and a vertical lifting rod is detachably mounted on the straight ruler and used for being lifted by a person in a standing state to drive the straight ruler to move horizontally together. A tester uses the pavement flatness testing device to carry out pavement flatness testing on a to-be-tested pavement, holds the lifting rod in a standing posture and transversely places the ruler on a testing point on the to-be-tested pavement to carry out pavement flatness testing, and the pavement flatness of the testing point is tested; the lifting rod is lifted in a standing state to drive the ruler to move to a next test point together, and then the ruler is transversely placed on the ground again by holding the lifting rod without squatting, so that the working intensity is low.

Description

Technical Field

[0001] The present invention relates to the field of road surface smoothness detection, and in particular to a road surface smoothness testing device. Background Art

[0002] The smoothness of the road surface not only affects the safety and comfort of driving, but is also directly related to the service life of the road. Therefore, after the completion or repair of a road, it is usually necessary to test the smoothness of the road surface. At present, a common practice is to use a 3M ruler to conduct this test. In order to comprehensively test the smoothness of the road surface, the tester first sets up multiple test points at intervals along the road to be tested. At each test point, he squats down, places the ruler horizontally on the road surface, and visually observes the gap between the bottom of the ruler and the road surface. He finds the point with the largest gap for height testing. After testing one test point, the tester picks up the ruler, stands up and walks to the next test point, squats down again, and places the ruler horizontally on the ground again, and tests the test point in the same way. The tester needs to squat when placing the ruler horizontally on the road surface. Multiple test points require squatting multiple times, which is very labor-intensive. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a road surface flatness testing device, in which a tester does not need to squat when placing a ruler horizontally on the road surface, and the work intensity is low.

[0004] In order to solve the above problem, a ruler for measuring is provided, on which a vertical lifting rod is detachably mounted, so that a person can lift the ruler in a standing position to move the ruler horizontally.

[0005] Furthermore, the ruler includes a first ruler segment and a second ruler segment rotatably connected together, and the first ruler segment and the second ruler segment can be rotated and retracted relative to each other.

[0006] Furthermore, a plurality of distance measuring sensors are installed at intervals along the bottom of the ruler.

[0007] Furthermore, a plurality of mounting holes are arranged at intervals along the bottom of the ruler, and the plurality of distance measuring sensors are mounted in the plurality of mounting holes in a one-to-one correspondence.

[0008] Furthermore, a display is installed on the ruler, which is connected to the distance measuring sensor and displays the data obtained by the distance measuring sensor test.

[0009] Furthermore, the display is mounted on the top surface of the ruler.

[0010] Furthermore, a clamping block extends forward from the bottom of the lifting rod, and a through hole is correspondingly opened forward on the ruler. The clamping block is clamped and installed in the through hole, and the lifting rod is detachably installed vertically on the ruler in this way.

[0011] Furthermore, the clamping block and the through hole are arranged obliquely upward.

[0012] Furthermore, the clamping block and the through hole are gradually narrowed toward the front.

[0013] Furthermore, a handle is installed on the top of the lifting rod.

[0014] Beneficial effects: The tester stands, holds the lifting rod and places the ruler horizontally on a test point on the road surface to be tested to perform a road surface flatness test. After measuring the road surface flatness of the test point, the tester lifts the lifting rod in a standing position to move the ruler to the next test point, and then holds the lifting rod to place the ruler horizontally on the ground again. There is no need to squat, and the work intensity is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the road surface roughness testing device.

[0016] Figure 2 This is a schematic diagram of the structure of the road surface smoothness test device from an upward perspective, with the lifting rod not installed on the ruler.

[0017] Figure 3 This is a schematic diagram showing the structure of a ruler in a retracted state.

[0018] Explanation of symbols:

[0019] 1- Ruler; 2- Far-infrared distance sensor; 3- Display; 4- Lifting rod; 5- Connecting block; 6- Through hole; 7- Mounting hole; 11- First ruler section; 12- Second ruler section. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with specific embodiments.

[0021] Road surface roughness test equipment Figure 1 As shown, it includes a 3-meter-long ruler 1. The first segment 11 and the second segment 12 of the ruler 1 are rotatably connected together, and the bottoms of the first segment 11 and the second segment 12 are visible. Figure 2 , there are 5 mounting holes 7 spaced apart along the ruler, each mounting hole 7 is installed in a far infrared distance sensor 2, a total of 10 far infrared distance sensors 2. A display 3 with a microprocessor (not shown in the drawings) is installed on the top surface of the first ruler section 11, and the display 3 is connected to the far infrared distance sensor 2. The test device includes two holding rods 4, each of which has a handle (not shown in the drawings) on the top and a gradually narrowing clamping block 5 (see Figure 3 ); the first and second segments 11 and 12 are respectively provided with a through hole 6 which is gradually narrowed and opens obliquely upwards (see Figure 3), the clamping block 5 is clamped and installed in the through hole 6, and the holding rod 4 is detachably installed vertically on the ruler 1.

[0022] The tester uses this test device to test the road surface smoothness. Figure 2 Starting from the state shown, first turn and open the first segment 11 and the second segment 12 to transform the ruler 1 into Figure 3 As shown in the state, then lift the two lifting rods 4 vertically, and insert the connecting blocks 5 of the two lifting rods 4 into the through holes 6 of the first scale segment 11 and the second scale segment 12 respectively, thereby installing the lifting rods 4 on the ruler 1, as shown in the state. Figure 1 As shown, the tester stands, grips the handle on the lifting rod 4, and places the ruler 1 horizontally on the road surface to be tested without squatting. In the prior art, the tester squats, places the ruler 1 horizontally on the road surface, and then visually observes the gap between the bottom surface of the ruler 1 and the road surface, finds the largest gap, and inserts a feeler gauge into that gap to measure the height of the largest gap. If there are several larger gaps between the bottom surface of the ruler 1 and the ground, and the largest gap cannot be determined, the tester needs to squat and insert a feeler gauge into each of the larger gaps to measure the heights of these gaps, and then compare the height of the largest gap. When using the road surface roughness testing device of the present application to test road surface roughness, the tester does not need to squat down and insert a feeler gauge into the gap between the bottom surface of the ruler 1 and the road surface to test. Instead, ten far-infrared distance measuring sensors 2 at the bottom of the ruler 1 measure the height of the gap between the bottom surface of the ruler 1 and the road surface, obtaining 10 gap data points. The data is transmitted to the microprocessor in the form of electrical signals. The microprocessor converts the electrical signals into digital signals, compares and determines the maximum number, and transmits the data to the display 3. The display 3 displays the gap data with the maximum height. The tester can read the data from the display 3 by lowering their head to determine the road surface roughness of the test point. After testing one test point, the tester lifts the lifting rod 4, moving the ruler 1 to the next test point. Because the clamping block 5 and through hole 6 are arranged obliquely upward, the ruler 1 is not easily dropped. After holding the lifting rod 4 and moving the ruler 1 to the next test point, the tester places the ruler 1 horizontally on the ground and tests the test point using the same testing method.

[0023] After the tester completes the flatness test on the road, he removes the lifting rod 4 from the ruler 1. Figure 3 As shown, the first segment 11 and the second segment 12 are rotated to retract the ruler 1 and restore it to its original shape. Figure 2 It can be stored in the state shown.

[0024] The above is only an embodiment of the present invention and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the present invention and still fall within the scope of patent protection.

Claims

1. A road surface smoothness testing device, comprising a ruler (1) for measuring, characterized in that: A vertical lifting rod is detachably mounted on the ruler (1) for a person to lift the ruler (1) in a standing position to drive the ruler (1) to move horizontally.

2. The road surface roughness testing device according to claim 1, wherein: The ruler (1) comprises a first ruler section (11) and a second ruler section (12) which are rotatably connected together. The first ruler section (11) and the second ruler section (12) can be rotated and retracted relative to each other.

3. The road surface roughness testing device according to claim 1, wherein: A plurality of distance measuring sensors (2) are installed at intervals along the bottom of the ruler (1).

4. The road surface roughness testing device according to claim 3, wherein: A plurality of mounting holes (7) are arranged at intervals along the bottom of the ruler (1), and a plurality of distance measuring sensors (2) are mounted in the plurality of mounting holes (7) in a one-to-one correspondence.

5. The road surface smoothness testing device according to claim 2, wherein: A display (3) is installed on the ruler (1), which is connected to the distance sensor (2) and displays the data obtained by the distance sensor (2) during testing.

6. The road surface roughness testing device according to claim 5, characterized in that: The display (3) is mounted on the top surface of the ruler (1).

7. The road surface smoothness testing device according to claim 1, wherein: A clamping block (5) extends forward from the bottom of the lifting rod (4), and a through hole (6) is correspondingly opened forward on the ruler (1). The clamping block (5) is clamped and installed in the through hole (6), and the lifting rod (4) is detachably installed vertically on the ruler (1) in this way.

8. The road surface smoothness testing device according to claim 7, characterized in that: The clamping block (5) and the through hole (6) are arranged obliquely upward.

9. The road surface smoothness testing device according to claim 7, wherein: The clamping block (5) and the through hole (6) are gradually narrowed toward the front.

10. The road surface smoothness testing device according to claim 1, wherein: A handle is installed on the top of the lifting rod (4).

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