Equipment for measuring rebound deflection of roadbed and pavement

Abstract

The utility model discloses equipment for measuring rebound deflection of a roadbed and a pavement, and belongs to the field of rebound deflection measuring tools of the roadbed and the pavement. Comprising a support used for forming a supporting line; the lever beam is connected with the bracket and is in running fit relative to the supporting line; the probe rod is fixed with one end of the lever beam; the laser range finder is fixed with the other end of the lever; wherein when the lever beam is horizontal, the laser range finder is used for forming range finding light vertically irradiated on the ground. The device for measuring the rebound deflection of the roadbed and the pavement has the beneficial effect that the device for measuring the rebound deflection of the roadbed and the pavement with high measurement precision is provided in a mode of replacing a dial indicator with the laser range finder.

Description

Technical Field

[0001] The present application relates to the field of roadbed and pavement rebound deflection measurement tools, and in particular, to a device for measuring roadbed and pavement rebound deflection. Background Art

[0002] The Beckman beam deflection meter is an instrument used to measure the rebound deflection of the roadbed and pavement when the design load is applied, and it is used as an important indicator of the overall bearing capacity of the roadbed and pavement to guide the pavement structure design. The existing Beckman beam deflection meter is mainly composed of a main beam and a table frame. The main beam is formed by two levers connected by bolts, one of which is connected to the table frame, and the other is connected to the probe perpendicular to the main beam. A dial indicator is installed on the table frame. During the test, the deflection value of the road surface is determined by the change in the dial indicator reading. The calculation formula is as shown in the figure below:

[0003] 4.1 The rebound deflection value of the pavement measuring point is calculated according to formula (T0951-1).

[0004] l t =(L 1 -L 2 )×2

[0005] Where l t ——Rebound deflection value at the average temperature t of the asphalt surface layer (0.01mm);

[0006] L 1 ——The maximum reading of the dial indicator when the wheel center is close to the Beckman beam probe (0.01mm);

[0007] L 2 ——The final reading (0.01mm) after the loading vehicle drives out of the radius of influence of bending and the dial indicator has settled.

[0008] However, the reading speed of the dial indicator is slow, and the measurement accuracy of the dial indicator is low, which is prone to errors. Utility Model Content

[0009] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0010] In order to solve the technical problems mentioned in the above background technology part, some embodiments of the present application provide a device for measuring the rebound deflection of roadbed and pavement, including: a bracket for forming a support line; a lever beam connected to the bracket and rotatably matched with the support line; a probe rod fixed to one end of the lever beam; a laser rangefinder fixed to the other end of the lever; wherein, when the lever beam is horizontal, the laser rangefinder is used to form a ranging light that is vertically irradiated on the ground.

[0011] Furthermore, an inclination detection device is provided on the lever beam, and the inclination detection device is used to detect the inclination angle of the lever beam relative to the horizontal plane.

[0012] Furthermore, the inclination detection device is an electronic inclinometer, a total station or a laser scanner.

[0013] Furthermore, the inclination detection device is preferably an electronic inclinometer.

[0014] Furthermore, the laser rangefinder is detachably connected to the lever beam.

[0015] Furthermore, a mounting plate is arranged above the support axis of the lever beam; the mounting plate is used to form a mounting plane for mounting the inclination detection device; when the lever beam is horizontal, the mounting plane is parallel to the horizontal plane.

[0016] Furthermore, the mounting plate is detachably connected to the lever beam.

[0017] Furthermore, a level is arranged on the installation plane.

[0018] Furthermore, the cross-section of the lever beam at the support line is constructed as an I-shape; the upper part of the lever beam forms a first surface and a second surface; a fastening bolt and an abutment portion are provided on the mounting plate; the fastening bolt is threadedly connected to the mounting plate; the abutment portion is connected to the fastening bolt, the mounting plate abuts against the first surface, and the abutment portion abuts against the second surface; rotating the fastening bolt can move the abutment portion relative to the mounting plate.

[0019] Furthermore, a support portion is provided in the middle of the mounting plate; the support portion forms a contact point with the first surface.

[0020] The beneficial effect of the present application is that a device with high measurement accuracy for measuring the rebound deflection of roadbed and pavement is provided by replacing the dial indicator with a laser rangefinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0022] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0023] In the attached picture:

[0024] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0025] Figure 2 yes Figure 1 A magnified view of part A;

[0026] Figure 3 It is a structural schematic diagram of a part of the embodiment, mainly showing a partial schematic diagram of a support plate and some surrounding parts;

[0027] Figure 4 It is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the support plate, the support part, the abutment part, the fastening bolts and the lever beam.

[0028] Reference numerals:

[0029] 1. Bracket; 2. Lever beam; 21. First surface; 22. Second surface; 3. Probe rod; 4. Laser rangefinder; 5. Inclination detection device; 6. Mounting plate; 7. Fastening bolts; 8. Abutment portion; 9. Support portion. DETAILED DESCRIPTION

[0030] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0031] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0032] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0033] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0034] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] Reference Figure 1-4 ,

[0036] A device for measuring the rebound deflection of a roadbed and pavement comprises: a bracket 1, a lever beam 2, a probe rod 3 and a laser rangefinder 4.

[0037] The bracket 1 is used to form a support line. The lever beam 2 is connected to the bracket 1 and rotates relative to the support line. The probe rod 3 is fixed to one end of the lever beam 2. The laser rangefinder 4 is fixed to the other end of the lever. When the lever beam 2 is horizontal, the laser rangefinder 4 is used to form a ranging light beam that is vertically irradiated on the ground.

[0038] In this embodiment, the support line is formed by setting a shaft body on the bracket 1, and the lever beam 2 is rotatably connected with the shaft body to realize the rotational cooperation of the lever beam 2 relative to the support line, and the support line is on the axis of the shaft body. The probe rod 3 extends downward, and the probe rod 3 is used to abut against the ground. The laser rangefinder 4 adopts the existing technology.

[0039] In other embodiments, the support line can also be formed by providing a hole on the bracket 1, and a shaft body inserted into the hole is provided on the lever beam 2, and the support line is the axis of the hole.

[0040] In actual use, the measurement accuracy of the laser rangefinder 4 is greater than that of the dial indicator, thereby being able to obtain a more accurate measurement result.

[0041] Specifically, the lever beam 2 is provided with an inclination detection device 5, and the inclination detection device 5 is used to detect the inclination angle of the lever beam 2 relative to the horizontal plane.

[0042] Since the laser rangefinder 4 mainly determines the distance by emitting a straight line light path outward and receiving a straight line light path, and in actual use, the lever beam 2 is inclined relative to the horizontal plane, so the distance measured by the laser rangefinder 4 is actually inclined, which will also cause errors in the calculation process. Therefore, the inclination is calculated by the inclination detection device 5, and the vertical distance is obtained by adding the inclination distance to the inclination angle.

[0043] The specific examples are as follows:

[0044] The probe rod 3 is placed at the wheel of the truck, and then the first distance of the laser rangefinder 4 and the first angle of the inclination detection device 5 are obtained; the truck is driven away, and the second distance of the laser rangefinder 4 and the second angle of the inclination detection device 5 are obtained;

[0045] The deflection value of the road surface is calculated as follows:

[0046] Road deflection value = 2*[first distance*cos(first angle)-second distance*cos(second angle)].

[0047] Greatly improved the accuracy of calculations.

[0048] Specifically, the inclination detection device 5 is an electronic inclinometer, a total station or a laser scanner, preferably an electronic inclinometer.

[0049] Specifically, the laser rangefinder 4 is detachably connected to the lever beam 2. Preferably, the detachable connection is achieved by bolt connection.

[0050] In other embodiments,

[0051] The lever beam 2 is provided with a mounting plate 6 above the support axis; the mounting plate 6 is used to form a mounting plane for mounting the inclination detection device 5; when the lever beam 2 is horizontal, the mounting plane is parallel to the horizontal plane. The mounting plate 6 is detachably connected to the lever beam 2. A level is provided on the mounting plane.

[0052] Specifically, the cross section of the lever beam 2 at the support line is constructed in an I-shape; the upper portion of the lever beam 2 forms a first surface 21 and a second surface 22. The mounting plate 6 is provided with a fastening bolt 7 and an abutment portion 8. The fastening bolt 7 is threadedly connected to the mounting plate 6; the abutment portion 8 is connected to the fastening bolt 7, the mounting plate 6 abuts against the first surface 21, and the abutment portion 8 abuts against the second surface 22; the fastening bolt 7 is rotated to enable the abutment portion 8 to move relative to the mounting plate 6. Four sets of fastening bolts 7 and abutment portions 8 are provided.

[0053] Specifically, a support portion 9 is provided in the middle of the mounting plate 6 ; the support portion 9 forms a contact point with the first surface 21 .

[0054] Through the above arrangement, the mounting plate 6 can be fastened at different positions by rotating the fastening bolts 7, so that the position of the mounting plate 6 can be adjusted at different angles until the mounting plate 6 is adjusted to a horizontal position where the spirit level detects the mounting plate 6, thereby better ensuring the accuracy of the inclination detection device 5.

[0055] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A device for measuring rebound deflection of roadbed and pavement, characterized in that: include: Brackets, used to form support lines; The lever beam is connected to the bracket and rotates relative to the support line; A probe rod, fixed to one end of the lever beam; a laser rangefinder, fixed to the other end of the lever; Wherein, when the lever beam is horizontal, the laser rangefinder is used to form a ranging light beam that is vertically irradiated on the ground.

2. The equipment for measuring rebound deflection of roadbed and pavement according to claim 1, characterized in that: An inclination detection device is arranged on the lever beam, and the inclination detection device is used to detect the inclination angle of the lever beam relative to the horizontal plane.

3. The device for measuring rebound deflection of roadbed and pavement according to claim 2, characterized in that: The inclination detection device is an electronic inclinometer, a total station or a laser scanner.

4. The device for measuring rebound deflection of roadbed and pavement according to claim 3 is characterized in that: The inclination detection device is an electronic inclinometer.

5. The device for measuring rebound deflection of roadbed and pavement according to claim 4, characterized in that: The laser rangefinder is detachably connected to the lever beam.

6. The equipment for measuring rebound deflection of roadbed and pavement according to claim 5, characterized in that: The lever beam is provided with a mounting plate above the support line; The mounting plate is used to form a mounting plane for mounting the inclination detection device; When the lever beam is horizontal, the mounting plane is parallel to the horizontal plane.

7. The equipment for measuring rebound deflection of roadbed and pavement according to claim 6, characterized in that: The mounting plate is detachably connected to the lever beam.

8. The device for measuring rebound deflection of roadbed and pavement according to claim 7, characterized in that: A level is arranged on the installation plane.

9. The device for measuring rebound deflection of roadbed and pavement according to claim 8, characterized in that: The cross section of the lever beam at the support line is configured as an I-shape; The upper portion of the lever beam forms a first surface and a second surface; The mounting plate is provided with a fastening bolt and an abutment portion; the fastening bolt is threadedly connected to the mounting plate; The abutment portion is connected to the fastening bolt, the mounting plate abuts against the first surface, and the abutment portion abuts against the second surface; The abutment portion can be moved relative to the mounting plate by rotating the fastening bolt.

10. The device for measuring rebound deflection of roadbed and pavement according to claim 9, characterized in that: A support portion is provided in the middle of the mounting plate; the support portion forms a contact point that contacts the first surface.

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