Friction coefficient measuring instrument based on automatic leveling and sliding length checking

Abstract

The utility model discloses a friction coefficient measuring instrument based on automatic leveling and sliding length checking, which comprises a T-shaped base, three ends of the T-shaped base are respectively provided with a leveling screw rod, the leveling screw rods are provided with leveling driving motors, the upper end face of the middle part of the T-shaped base is connected with a stand column and a level bubble, and the upper end face of the middle part of the T-shaped base is connected with the leveling driving motors. An axial stand column measuring scale is arranged on the side wall of the end, close to the T-shaped base, of the stand column, a height adjusting gear matched with a stand column measuring scale rack is arranged on the upper end face of the stand column, a height driving motor is arranged on the right side of the height adjusting gear, a fixed handle and a cantilever are fixed to the top of the stand column, and a positioning clamping ring is arranged on the right side of the cantilever. The inclination angle and the inclination direction of the instrument are measured through the double-shaft inclination angle sensor, and the leveling driving motor is controlled by the data acquisition processing and control platform to drive the leveling screw rod to rotate so as to achieve the purpose of automatic leveling.

Description

Technical Field

[0001] The utility model relates to the technical field of road detection, in particular to a friction coefficient measuring instrument based on automatic leveling and checking sliding length. Background Art

[0002] The anti-skid performance of the road surface is one of the important factors for highway traffic safety. The anti-skid performance of the road surface is closely related to driving safety. Especially in winter, rainy seasons and highway curves, vehicles often skid and get out of control on road surfaces with insufficient anti-skid ability, resulting in property losses and casualties. The anti-skid performance of the road surface is affected by many factors such as weather (climate) and road surface conditions, so advanced detection equipment and technologies are particularly important.

[0003] The pendulum method is one of the commonly used methods for detecting the anti-skid performance of road surfaces. However, for the current pendulums in China, firstly, manual leveling is usually required, and it is easy to collide with the instrument during the detection process, making the instrument unable to maintain the leveling state, and it is not easy for the measurement personnel to find, resulting in a relatively large detection error; secondly, the sliding length usually needs to be manually checked during the detection process, and this process often has a large deviation in checking the sliding length due to different users and different operation procedures, resulting in inconsistent detection results and other situations. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract and the title of the specification, but such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] In view of the problems existing in the existing friction coefficient measuring instrument based on automatic leveling and checking sliding length, the present utility model is proposed.

[0006] Therefore, the purpose of the present utility model is to provide a friction coefficient measuring instrument based on automatic leveling and checking sliding length, which solves the problems in the prior art such as manual leveling of the measuring instrument, inability to maintain the leveling state, large deviation in manually checking the sliding length, and inconsistent detection results.

[0007] To solve the above technical problems, the present utility model provides the following technical solutions: A friction coefficient measuring instrument based on automatic leveling and checking the sliding length, comprising: a T-shaped base, with a leveling screw provided at each of the three ends of the T-shaped base, a leveling drive motor provided on the leveling screw, an upright column and a spirit level connected to the upper end surface in the middle of the T-shaped base, an axial upright column scale provided on the side wall of one end of the upright column close to the T-shaped base, a height adjustment gear adapted to the upright column scale rack provided on the upper end surface of the upright column, a height drive motor provided on the right side of the height adjustment gear, a fixed handle and a cantilever fixed to the top of the upright column, a positioning collar provided on the right side of the cantilever, a data acquisition, processing and control platform provided on the left side of the cantilever, an LED digital display panel, control buttons and a biaxial inclination sensor provided on the front side of the data acquisition, processing and control platform, a swing rod, a pendulum and a slider connected to the upper end of the upright column through a rotating shaft, and an angle measuring photoelectric encoder provided inside the rotating shaft.

[0008] As a preferred scheme of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present utility model, wherein: the leveling drive motor, the height drive motor, the biaxial inclination sensor and the angle measuring photoelectric encoder are respectively electrically connected to the data acquisition, processing and control platform.

[0009] As a preferred scheme of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present utility model, wherein: a data transmission interface is provided on the rear side of the data acquisition, processing and control platform, and can be connected to an external computer for data transmission.

[0010] As a preferred scheme of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present utility model, wherein: the height drive motor is controlled by the control button to raise the pendulum and enable it to swing freely. When the pendulum reaches the highest position and just starts to fall.

[0011] As a preferred scheme of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present utility model, wherein: an adjusting nut is provided on the pendulum. When the pendulum reaches the highest position and just starts to fall, the LED digital display panel should display zero at this time. If not, adjust it by rotating the tightening and loosening adjusting nut.

[0012] The beneficial effects of the present utility model: The present utility model measures the inclination angle and inclination direction of the instrument through the biaxial inclination sensor. The data acquisition, processing and control platform controls the leveling drive motor to drive the leveling screw to rotate to achieve the purpose of automatic leveling. The angle when the slider of the instrument touches the ground is measured through the angle measuring photoelectric encoder. The data acquisition, processing and control platform controls the height drive motor to drive the height adjustment gear to rotate to achieve the purpose of automatically checking the sliding length, greatly improving the detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0014] Figure 1 It is a schematic diagram of the overall structure of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present invention.

[0015] Figure 2 It is a front view structural schematic diagram of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present invention.

[0016] Figure 3 It is a side view structural schematic diagram of the friction coefficient measuring instrument based on automatic leveling and checking the sliding length of the present invention. Specific embodiments

[0017] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings of the specification.

[0018] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0019] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that mutually excludes other embodiments.

[0020] Furthermore, the present invention is described in detail in conjunction with the schematic diagrams. When detailing the embodiments of the present invention, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general ratio, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0021] Refer to Figure 1-3, a friction coefficient measuring instrument based on automatic leveling and checking the sliding length is provided, including: a T-shaped base 3, with a leveling screw 1 provided at each of the three ends of the T-shaped base 3, a leveling drive motor 2 is provided on the leveling screw 1, the upper end surface of the middle part of the T-shaped base 3 is connected with a column 5 and a spirit level 4, an axial column scale 19 is arranged on the side wall of one end of the column 5 close to the T-shaped base 3, a height adjustment gear 20 adapted to the rack of the column scale 19 is arranged on the upper end surface of the column 5, a height drive motor 6 is arranged on the right side of the height adjustment gear 20, a fixed handle 11 and a cantilever 12 are fixed on the top of the column 5, a positioning collar 13 is arranged on the right side of the cantilever 12, a data acquisition, processing and control platform 8 is arranged on the left side of the cantilever 12, an LED digital display panel 10, a control button 18 and a biaxial inclination sensor 7 are arranged on the front side of the data acquisition, processing and control platform 8, the upper end of the column 5 is connected with a pendulum rod 15, a pendulum bob 16 and a slider 17 through a rotating shaft 14, and an angle measuring photoelectric encoder 21 is arranged inside the rotating shaft 14.

[0022] Among them, the leveling drive motor 2, the height drive motor 6, the biaxial inclination sensor 7 and the angle measuring photoelectric encoder 21 are respectively electrically connected to the data acquisition, processing and control platform 8, and a data transmission interface 9 is arranged at the rear side of the data acquisition, processing and control platform 8, which can be connected to an external computer for data transmission. This transmission process is prior art and will not be elaborated here.

[0023] Among them, the height drive motor 6 is controlled by the control button 18 to raise the pendulum and make it swing freely. When the pendulum bob 16 starts to fall after reaching the highest position, an adjusting nut is arranged on the pendulum bob 16. When the pendulum bob 16 starts to fall after reaching the highest position, the LED digital display panel 10 should display zero at this time. If not, adjust by rotating the tightening and loosening adjusting nut.

[0024] During the use process:

[0025] Step 1: The external dimensions of the present invention are length × width × height = 600mm × 280mm × 600mm. Place the present invention at the measuring point, clean the surface of the measuring point. The biaxial inclination sensor 7 measures that the current X and Y biaxial inclinations of the present invention are 5° and 7° respectively. Taking the long side direction of the T-shaped base 3 of the present invention as the X direction, when the leveling screw 1 rotates one week, it rises 1mm. Then the number of rotation circles A of the two leveling screws in the long side direction of the present invention should be driven by the leveling drive motor 2, and its expression is:

[0026]

[0027] For the T-shaped base 3 of the present utility model, the leveling screw 1 on the left side in the long side direction is driven forward by the leveling drive motor 2, causing the leveling screw 1 to rotate and move downward. The leveling screw 1 on the right side in the long side direction of the T-shaped base 3 of the present utility model is driven in the reverse direction by the leveling drive motor 2, causing the leveling screw 1 to rotate and move upward. The number of rotation turns of both is 26.2 turns.

[0028] Step 2: Through Step 1, the automatic leveling of the instrument in the X direction is achieved. The leveling screw 1 in the wide side direction of the T-shaped base 3 of the present utility model is driven by the leveling drive motor 2, and the number of driving turns is B. Its expression is:

[0029]

[0030] The leveling screw 1 in the wide side direction of the T-shaped base 3 of the present utility model is driven in the reverse direction by the leveling drive motor 2, causing the leveling screw 1 to rotate and move upward by 17.1 mm;

[0031] Step 3: Through Steps 1 and 2, the two-way automatic leveling of the instrument of the present utility model is achieved. The height drive motor 6 is controlled by the control button 18 to raise the pendulum and enable it to swing freely. Then, the pendulum 16 is fixed on the positioning collar 13. Press the release switch with the right hand to make the pendulum 16 swing to the left. When the pendulum 16 reaches the highest position and just starts to fall, the LED digital display panel 10 should display zero at this time. If it is not zero, adjust it by turning the tension adjustment nut, and repeat Step 3 until it is zero.

[0032] Step 4: The distance from the outer edge of the rubber sheet of the present utility model to the swing center is 510 mm. Let the pendulum 16 be in a natural hanging state. The height drive motor 6 is controlled by the control button 18 to lower the pendulum 16, and lift it to move the pendulum 16 to the left side, so that the lower edge of the slider 17 gently touches the ground. At this time, the angle measurement photoelectric encoder 21 records the angle as 70°. Then, the data acquisition, processing, and control platform 8 drives the height drive motor 6 to change the height of the pendulum 16 by δ. Its expression is:

[0033]

[0034] Then the pendulum 16 moves upward by 69.0 mm; <>

[0035] Step 4: Through Step 4, the automatic checking of the sliding length of the present new type can be achieved, and the detection starts.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.

Claims

1. A friction coefficient measuring instrument based on automatic leveling and checking the sliding length, characterized in that, Including: A T-shaped base (3), with a leveling screw (1) provided at each of the three ends of the T-shaped base (3). A leveling drive motor (2) is provided on the leveling screw (1). The upper end surface of the middle part of the T-shaped base (3) is connected with a column (5) and a spirit level (4). An axial column scale (19) is arranged on the side wall of one end of the column (5) close to the T-shaped base (3). A height adjustment gear (20) adapted to the rack of the column scale (19) is arranged on the upper end surface of the column (5). A height drive motor (6) is arranged on the right side of the height adjustment gear (20). A fixed handle (11) and a cantilever (12) are fixed at the top of the column (5). A positioning snap ring (13) is arranged on the right side of the cantilever (12), and a data acquisition, processing and control platform (8) is arranged on the left side of the cantilever (12). An LED digital display panel (10), a control button (18) and a biaxial inclination sensor (7) are arranged on the front side of the data acquisition, processing and control platform (8). The upper end of the column (5) is connected with a pendulum rod (15), a pendulum bob (16) and a slider (17) through a rotating shaft (14). An angle measurement photoelectric encoder (21) is arranged inside the rotating shaft (14).

2. The friction coefficient measuring instrument based on automatic leveling and checking sliding length according to claim 1, characterized in that: The leveling drive motor (2), the height drive motor (6), the biaxial inclination sensor (7) and the angle measurement photoelectric encoder (21) are respectively electrically connected with the data acquisition, processing and control platform (8).

3. The friction coefficient measuring instrument based on automatic leveling and checking sliding length according to claim 2, characterized in that: A data transmission interface (9) is arranged at the rear side of the data acquisition, processing and control platform (8), and can be connected with an external computer for data transmission.

4. The friction coefficient measuring instrument based on automatic leveling and checking sliding length according to claim 1, characterized in that: The height drive motor (6) is controlled by the control button (18) to raise the pendulum and make it swing freely. When the pendulum bob (16) reaches the highest position and just starts to fall.

5. The friction coefficient measuring instrument based on automatic leveling and checking sliding length according to claim 4, wherein: An adjusting nut is arranged on the pendulum bob (16). When the pendulum bob (16) reaches the highest position and just starts to fall, the LED digital display panel (10) should display zero at this time. If not, adjust by rotating the tightening and loosening adjusting nut.

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