CN220251699U

CN220251699U - Pendulum type friction coefficient tester

Info

Publication number: CN220251699U
Application number: CN202322063925.8U
Authority: CN
Inventors: 张卫刚; 杨孟源; 展英达
Original assignee: Shuyang County Zhongke Zhiba Highway Instrument Co ltd
Current assignee: Shuyang County Zhongke Zhiba Highway Instrument Co ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2023-12-26
Anticipated expiration: 2033-08-02

Abstract

The application discloses a pendulum friction coefficient tester. The device comprises a stand column, a base and a cross beam, wherein a rotating shaft is arranged in the middle of the cross beam, a swing rod is fixedly connected to the rotating shaft, and a swing head is arranged at the end part of the swing rod; one end of the cross beam is provided with a groove, and an electric control magnetic component is arranged in the groove; the other end of the cross beam is provided with a display panel, and the cross beam is provided with an electric control release switch; the swing rod is provided with a contact block at a position corresponding to the electric control magnetic attraction assembly; an angle feedback assembly is arranged in the cross beam and is connected with the rotating shaft; a controller is arranged in the base. The device abandons the traditional mechanical release control switch, adopts an electric control actuation mode, so that the swing rod and the swing head can be stably fixed on the cross beam, and front-back displacement and swing cannot be generated; and need not to set up traditional pressure spring and pressure head, release switch can not produce wearing and tearing, can measure the actual conditions on road surface always correctly, promotes instrument measuring result's precision greatly, has reduced measuring error.

Description

Pendulum type friction coefficient tester

Technical Field

The application relates to the technical field of detection equipment, in particular to a pendulum friction coefficient tester.

Background

The pendulum friction coefficient tester is an instrument for testing friction coefficient of road surface, runway, marking paint, etc. The pendulum friction coefficient tester is a dynamic pendulum impact type instrument, and is developed according to the basic principle that potential energy loss of pendulum is equal to work done by overcoming friction of a road surface when a rubber sheet arranged at the tail end of a swing arm slides across the road surface.

The pendulum friction coefficient tester can be used for measuring the anti-skid value of an asphalt pavement marking line or other material test pieces (polishing values), evaluating the anti-skid capability of the pavement or the material test pieces in a wet state, and evaluating the braking distance of a vehicle tire in the wet state and the anti-skid capability of the asphalt pavement. The pendulum friction system tester is an important detection device for asphalt pavement.

In a pendulum friction coefficient tester commonly used in field test, a circular clamping groove with a notch is arranged on a swing arm, and a device with a connecting rod for controlling the release of the swing arm is arranged on a right cantilever. The circular clamping groove is clamped on the connecting rod of the release device, so that the horizontal fixation of the pendulum can be realized; when the pendulum at the horizontal release position is required to release, the release switch can be pressed down, and the pendulum can fall down to finish the field test work.

However, the conventional pendulum friction coefficient measuring instrument has been controlled by using a mechanical release switch including a spring and a pressure head. During the use, when the hand presses the release switch, the pressure spring and the pressure head fall down simultaneously, so that the pendulum can be released. However, by using the mechanical release switch, lateral displacement and axial outward movement can be generated by long-time pressing, so that the pressure spring and the pressure head are easy to wear, and the accuracy of data measurement is affected, and the measurement experimental data is inaccurate and has larger error.

In addition, when the circular clamping groove is clamped on the connecting rod by using the mechanical release switch, the clamping groove can move back and forth on the connecting rod due to the lack of constraint in the front-back direction, and the measurement error is increased, so that the anti-skid index of the road surface cannot be accurately evaluated.

Disclosure of Invention

Therefore, the application provides a pendulum type friction coefficient tester to solve current pendulum type friction coefficient tester and use mechanical release switch to release control, pressure spring, pressure head are easy wearing and tearing, and the draw-in groove can be back and forth on the connecting rod, lead to increased measuring error's technical problem.

In order to achieve the above object, the present application provides the following technical solutions:

the pendulum friction coefficient tester comprises a stand column, wherein a base is arranged at the lower end of the stand column, a cross beam is arranged on the stand column, a rotating shaft is arranged in the middle of the cross beam, a pendulum rod is fixedly connected to the rotating shaft, a pendulum head is arranged at the end part of the pendulum rod, and the pendulum head comprises a balance top, a rubber sheet and a lifting hook;

a groove is formed in one end of the cross beam, and an electric control magnetic component is arranged in the groove; the other end of the cross beam is provided with a display panel, and the cross beam is provided with an electric control release switch; the swing rod is provided with a contact block at a position corresponding to the electric control magnetic component; an angle feedback assembly is arranged in the cross beam and is connected with the rotating shaft; the base is internally provided with a controller, the control signal input end of the electric control magnetic attraction assembly is electrically connected with one path of control signal output end of the controller, the control signal output end of the electric control release switch is electrically connected with one path of control signal input end of the controller, the data output end of the angle feedback assembly is electrically connected with the data input end of the controller, and the display panel is in bidirectional communication connection with the controller.

Optionally, a plurality of screw holes are formed in the base, and a leveling knob is arranged in each screw hole.

Optionally, a lifting mechanism is arranged at the back of the cross beam, and the cross beam can move up and down on the upright post through the lifting mechanism.

Optionally, the angle feedback component is a code wheel.

Optionally, the display panel includes a display and a plurality of control keys, a control signal input end of the display is electrically connected with one path of control signal output end of the controller, and a control signal output end of each control key is electrically connected with one path of control signal input end of the controller.

Optionally, a battery assembly and a memory are further arranged in the base, and an electric quantity display screen, a first power switch key and a power charging interface are arranged on the base; the voltage output end of the battery assembly is electrically connected with the voltage input end of the controller through the first power switch key; the voltage output end of the power charging interface is electrically connected with the voltage input end of the battery assembly, and the power charging interface is used for being electrically connected with a power supply; the memory is in bidirectional communication connection with the controller; and the control signal output end of the electric quantity display screen is electrically connected with one path of control signal output end of the controller.

Optionally, a signal interface is arranged on the base, and a control signal output end of the electric control release switch is electrically connected with one path of control signal input end of the controller through the signal interface.

Optionally, a communication interface and a second power switch button are arranged on the back of the display panel; the data output end of the controller is electrically connected with the data input end of the communication interface, and the communication interface is used for establishing communication connection with the terminal; the display panel is in bidirectional communication connection with the controller through the second power switch key.

Optionally, a handle is arranged at the upper end of the upright post.

Further alternatively, the handle is made of aluminum alloy.

Compared with the prior art, the application has the following beneficial effects:

the application provides a new hardware architecture of a pendulum friction coefficient tester, which adopts a large number of integrated circuit control to realize digital measurement, abandons a traditional mechanical release control switch, and selects an electric control magnetic component and a magnet and matches with the electric control release switch to perform pendulum release control; the electric control suction mode provides omnibearing magnetic force constraint for the swing rod and the swing head, so that the swing rod and the swing head can be stably fixed on the cross beam without front and back displacement and shaking, the problems that a clamping groove on the swing of the original pendulum instrument slides back and forth on a connecting rod at a release switch and the swing head can shake back and forth are solved, and the accuracy of a test is improved; moreover, the release switch controlled by electric control is adopted, and the traditional pressure spring and pressure head are not required to be arranged, so that the release switch cannot generate lateral displacement and axial external movement during release measurement, abrasion cannot be generated, the actual condition of the road surface can be always and correctly measured, the accuracy of the measuring result of the instrument is greatly improved, and the measuring error is reduced.

Drawings

For a more visual illustration of the prior art and the present application, several exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

Fig. 1 is a schematic perspective view of a pendulum friction coefficient measuring apparatus according to an embodiment of the present application;

fig. 2 is a schematic diagram of a first front structure of a pendulum friction coefficient measuring device according to an embodiment of the present application;

fig. 3 is a schematic diagram of a second front structure of a pendulum friction coefficient measuring device according to an embodiment of the present application;

FIG. 4 is a block diagram of the circuit connection relationship of a pendulum friction coefficient tester according to an embodiment of the present application;

fig. 5 is a schematic diagram of a back structure of a pendulum friction coefficient measuring apparatus according to an embodiment of the present application;

FIG. 6 is a block diagram of a detailed circuit connection relationship of a pendulum friction coefficient tester according to an embodiment of the present application;

fig. 7 is a block diagram of a complete circuit connection relationship of a pendulum friction coefficient tester according to an embodiment of the present application.

Reference numerals illustrate:

1. a column; 2. a base; 3. a cross beam; 4. a rotating shaft; 5. swing rod; 6. balance top; 7. a rubber sheet; 8. a lifting hook; 9. a groove; 10. an electric control magnetic component; 11. a display panel; 111. a display; 112. a control key; 12. an electric control release switch; 13. a touch block; 14. an angle feedback assembly; 15. a controller; 16. leveling a knob; 17. a lifting mechanism; 18. a battery assembly; 19. a memory; 20. an electric quantity display screen; 21. a first power switch key; 22. a power supply charging interface; 23. a signal interface; 24. a communication interface; 25. a second power switch key; 26. a handle.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

In the embodiment of the application, as shown in fig. 1-3, a pendulum friction coefficient tester is provided, and the pendulum friction coefficient tester comprises a stand column 1, wherein a base 2 is arranged at the lower end of the stand column 1, a cross beam 3 is arranged on the stand column 1, a rotating shaft 4 is arranged in the middle of the cross beam 3, a pendulum rod 5 is fixedly connected to the rotating shaft 4, a pendulum head is arranged at the end part of the pendulum rod 5, and the pendulum head comprises a balance top 6, a rubber sheet 7, a lifting hook 8, a slide block and the like;

a groove 9 is formed in one end of the cross beam 3, and an electric control magnetic attraction assembly 10 is arranged in the groove 9; the other end of the cross beam 3 is provided with a display panel 11, and the cross beam 3 is provided with an electric control release switch 12; the swing rod 5 is provided with a contact block 13 at a position corresponding to the electric control magnetic attraction assembly 10, and the contact block 13 can be an iron block; an angle feedback assembly 14 is arranged in the cross beam 3, and the angle feedback assembly 14 is connected with the rotating shaft 4;

the base 2 is provided with a controller 15, as shown in fig. 4, a control signal input end of the electric control magnetic attraction assembly 10 is electrically connected with one path of control signal output end of the controller 15, a control signal output end of the electric control release switch 12 is electrically connected with one path of control signal input end of the controller 15, a data output end of the angle feedback assembly 14 is electrically connected with a data input end of the controller 15, and the display panel 11 is in bidirectional communication connection with the controller 15.

The angle feedback component 14 is specifically disposed at the rear end of the rotation shaft 4 and located in the middle of the beam 3, and the angle feedback component 14 can detect the rotation angle of the rotation shaft 4, that is, can measure and obtain the rotation angle of the swing rod 5 and the swing head. In addition, the shape of the groove 9 is matched with the shape of the contact block 13, so that the contact block 13 can be positioned in the groove 9 under the adsorption of the electric control magnetic attraction component 10.

In other words, the friction coefficient measuring apparatus provided in the embodiment of the present application includes a supporting mechanism and a swinging mechanism, the supporting mechanism is composed of a stand column 1, a base 2, a beam 3, a groove 9, an electric control magnetic attraction component 10 (i.e. an electromagnet), a display panel 11, an electric control release switch 12, a controller 15, and the like, and the swinging mechanism is composed of a rotating shaft 4, a swinging rod 5, a balance top 6, a rubber sheet 7, a lifting hook 8, a contact block 13, an angle feedback component 14, and the like. One end of the swinging mechanism is rotationally connected with the supporting mechanism, and the other end of the swinging mechanism is made of rubber and is used for measuring or detecting friction coefficients of samples to be measured such as marble, plastic tracks, airport runways, wood floors, inspection well cover plates, ceramic tiles and the like.

The supporting structure is provided with an electric control magnetic attraction assembly 10, a starting and stopping mechanism (an electric control release switch 12) and a controller 15, the swinging mechanism comprises a contact block 13, and the electric control magnetic attraction assembly 10 and the electric control release switch 12 are electrically connected with the controller 15. The electronic control magnetic attraction assembly 10 is arranged in the groove 9 of the supporting mechanism and is positioned on the rotating path of the swinging mechanism, the electronic control magnetic attraction assembly 10 is in sliding connection with the cross beam 3 of the supporting mechanism, and the electronic control magnetic attraction assembly 10 is used for adsorbing or desorbing the swinging mechanism.

When the friction coefficient tester provided by the application is used, the friction coefficient of a sample to be tested is measured by the rubber sheet 7 of the swinging head, which is the same as the existing pendulum tester: when the contact block 13 is attached to the electric control magnetic attraction assembly 10, the electric control magnetic attraction assembly 10 can generate electromagnetic force, and the electric control magnetic attraction assembly 10 can adsorb the contact block 13, which is equivalent to the electric control magnetic attraction assembly 10 can adsorb the swing rod 5 and the swing head, that is, the electric control magnetic attraction assembly 10 can play a role of adsorbing the swing mechanism, and the accumulated gravitational potential energy is measured for the swing of the swing mechanism.

When the user needs to measure the friction coefficient of the sample to be measured, only the electric control release switch 12 needs to be pressed down, and then the controller 15 sends a control signal to the electric control magnetic assembly 10 after receiving a state control signal indicating that the electric control release switch 12 is pressed down, so that the electric control magnetic assembly 10 is instantaneously disconnected and demagnetized, and the contact block 13 is separated from the adsorption of the electric control magnetic assembly 10. When the contact block 13 is separated from the electric control magnetic attraction assembly 10, under the condition of removing electromagnetic force, the swing rod 5 and the swing head only swing under the action of gravity of the contact block, so that the influence of external force in other directions on the swing rod 5 is avoided, the swing precision of the swing rod 5 is improved, and the detection precision is further improved.

In the process of swinging the swing rod 5 and the swing head, the rotating shaft 4 and the angle feedback assembly 14 are driven to rotate simultaneously, the angle feedback assembly 14 can detect the rotating angle of the rotating shaft 4 in real time, and accordingly the controller 15 can calculate the friction coefficient of a sample to be detected according to the rotating angle of the rotating shaft 4, namely the rotating angle of the swing rod 5 and the swing head, and can send the calculated friction coefficient to the display panel 11 for display.

That is, by adopting the above technical scheme, when the iron contact block is connected with the electromagnet, the electromagnet is electrified to form electromagnetic force, so that the iron block can be adsorbed, and the swing mechanism can perform the lower swing with initial gravitational potential energy. After the electric control release switch 12 is pressed to demagnetize the electric control magnetic component 10, the adsorption force between the iron block and the electromagnet is instantaneously disappeared, the contact block 13 and the electromagnet can be separated, the swinging mechanism swings downwards under the action of gravity, the friction coefficient of the sample to be detected is detected, the interference of external force in other directions is reduced, and the swinging mechanism can stably detect.

Further, a plurality of screw holes are formed in the base 2, and a leveling knob 16 is disposed in each screw hole. The base 2 may be of a T-shaped structure, consisting of 3 legs, each provided with a screw hole and a levelling knob 16. Of course, the base 2 may also be provided with a vial.

Further, as shown in fig. 5, the back of the cross beam 3 is provided with a lifting mechanism 17, and the cross beam 3 can move up and down on the upright 1 by the lifting mechanism 17, and the lifting mechanism 17 is used for lifting and fixing the swing position. The lifting mechanism 17 may specifically comprise two lifting knobs.

Further, the angle feedback component 14 may be a code wheel, and in particular may be an optoelectronic code wheel. How the code wheel is specifically connected to the rotation shaft 4 to detect the rotation angle of the rotation shaft 4 is common knowledge of a person skilled in the art, and thus will not be described in detail.

Further, as shown in fig. 6, the display panel 11 specifically includes a display 111 and a plurality of control keys 112, wherein a control signal input end of the display 111 is electrically connected to one path of control signal output end of the controller 15, and a control signal output end of each control key 112 is electrically connected to one path of control signal input end of the controller 15.

The display 111 is capable of displaying the measured friction coefficient and also providing a display operation interface for realizing the corresponding function by the control key 112. The plurality of control keys 112 may include a set key, a number key, a select key, a print key, etc., which may be used to select whether to measure a road surface or a finish value, to perform a function of setting an identification road segment number, etc. Specifically, which keys can be set can be customized according to the functions of the tester in actual application.

Further, as shown in fig. 5-7, a battery assembly 18 and a memory 19 are further disposed in the base 2, and an electric quantity display screen 20, a first power switch key 21 and a power charging interface 22 are disposed on the base 2; the voltage output end of the battery assembly 18 is electrically connected with the voltage input end of the controller 15 through the first power switch key 21; the voltage output end of the power charging interface 22 is electrically connected with the voltage input end of the battery assembly 18, and the power charging interface 22 is used for being electrically connected with a power supply; the memory 19 is connected with the controller 15 in a bidirectional communication manner; the control signal output end of the power display screen 20 is electrically connected with one path of control signal output end of the controller 15.

When the first power switch key 21 is pressed to gate the first power switch key 21, the battery assembly 18 can provide the required working voltage for the controller 15 and other various circuit modules; battery assembly 18 can be charged through power charging interface 22. The battery assembly 18 may be a lithium battery, and can stand by for 86 hours, and is suitable for indoor and outdoor measurement.

In addition, the memory 19 can store not only the operation data required for the measuring instrument itself, but also the friction coefficient data measured by the measuring instrument, and the memory 19 can store 400 sets of data. The current remaining power of the battery assembly 18 can be displayed through the power display 20; meanwhile, the current residual electric quantity of the battery assembly 18 can be displayed through the display panel 11.

Further, as shown in fig. 5-7, the base 2 is provided with a signal interface 23, and the control signal output end of the electric control release switch 12 is electrically connected with one path of control signal input end of the controller 15 through the signal interface 23.

Further, as shown in fig. 5 to 7, the back surface of the display panel 11 is provided with a communication interface 24 and a second power switch key 25; the data output end of the controller 15 is electrically connected with the data input end of the communication interface 24, and the communication interface 24 is used for establishing communication connection with the terminal; the display panel 11 is connected with the controller 15 in a bi-directional communication manner through the second power switch key 25.

After the first power switch key 21 is pressed to activate the meter, the second power switch key 25 is pressed again to activate the display panel 11. After the communication interface 24 is connected to the terminal, data detected by the meter can be transmitted to the terminal, so that friction data measured in real time can be referred to and printed by the terminal. Of course, the print button on the display panel 11 may be directly pressed, so that the controller 15 can directly send the detected data to the terminal, and directly send a control signal to the terminal, so that the terminal prints the detected data.

Further, the upper end of the upright 1 is provided with a handle 26. The handle 26 may be, but is not limited to, an aluminum alloy.

The application provides a novel hardware architecture of a pendulum friction coefficient tester, a large number of integrated circuit controls are adopted to realize digital measurement, a traditional mechanical release control switch is abandoned, an electric control magnetic attraction component and a magnet are selected and matched with the electric control release switch to perform release control of pendulum, and an omnibearing magnetic force constraint is provided for a pendulum rod and a pendulum head in an electric control attraction mode, so that the pendulum rod and the pendulum head can be stably fixed on a cross beam, front-back displacement and swinging cannot be generated, the problem that a clamping groove on the pendulum of an original pendulum tester slides back and forth on a connecting rod at the release switch and the pendulum head can swing back and forth is solved, and the accuracy of a test is improved; moreover, the release switch controlled by electric control is adopted, and the traditional pressure spring and pressure head are not required to be arranged, so that the release switch cannot generate lateral displacement and axial external movement during release measurement, abrasion cannot be generated, the actual condition of the road surface can be always and correctly measured, the accuracy of the measuring result of the instrument is greatly improved, and the measuring error is reduced.

In summary, the pendulum friction coefficient measuring instrument provided by the application comprises at least one of the following beneficial technical effects:

(1) The swinging mechanism rotates relative to the supporting mechanism, and the free end of the swinging mechanism is used for measuring the friction coefficient of a sample to be measured;

(2) When the contact block is attached to the electric control magnetic attraction component, the electric control magnetic attraction component plays a role of adsorbing the swing mechanism because the electric control magnetic attraction component generates electromagnetic force, and the accumulated gravitational potential energy is measured for the swing of the swing mechanism;

(3) After the contact block is separated from the electric control magnetic component, the swing rod only swings under the action of gravity of the swing rod under the condition that the electromagnetic force is removed, so that the influence of external force on the swing rod in other directions is avoided, the swing precision of the swing rod is improved, and the detection precision is further improved.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims

1. The pendulum friction coefficient tester comprises a stand column, wherein a base is arranged at the lower end of the stand column, a cross beam is arranged on the stand column, a rotating shaft is arranged in the middle of the cross beam, a pendulum rod is fixedly connected to the rotating shaft, a pendulum head is arranged at the end part of the pendulum rod, and the pendulum head comprises a balance top, a rubber sheet and a lifting hook; the method is characterized in that:

2. The pendulum friction coefficient measuring instrument according to claim 1, wherein a plurality of screw holes are provided in the base, and a leveling knob is provided in each screw hole.

3. The pendulum friction coefficient measuring instrument according to claim 1, wherein a lifting mechanism is provided on the back of the cross beam, and the cross beam is movable up and down on the column by the lifting mechanism.

4. The pendulum friction coefficient measuring instrument according to claim 1, wherein the angle feedback assembly is a code wheel.

5. The pendulum friction coefficient measuring instrument according to claim 1, wherein the display panel comprises a display and a plurality of control keys, wherein a control signal input end of the display is electrically connected with one path of control signal output end of the controller, and a control signal output end of each control key is electrically connected with one path of control signal input end of the controller.

6. The pendulum friction coefficient tester according to claim 1, wherein a battery assembly and a memory are further arranged in the base, and an electric quantity display screen, a first power switch key and a power charging interface are arranged on the base; the voltage output end of the battery assembly is electrically connected with the voltage input end of the controller through the first power switch key; the voltage output end of the power charging interface is electrically connected with the voltage input end of the battery assembly, and the power charging interface is used for being electrically connected with a power supply; the memory is in bidirectional communication connection with the controller; and the control signal output end of the electric quantity display screen is electrically connected with one path of control signal output end of the controller.

7. The pendulum friction coefficient measuring instrument according to claim 1, wherein a signal interface is provided on the base, and a control signal output end of the electric control release switch is electrically connected with one path of control signal input end of the controller through the signal interface.

8. The pendulum friction coefficient measuring instrument according to claim 1, wherein a communication interface and a second power switch button are provided on the back surface of the display panel; the data output end of the controller is electrically connected with the data input end of the communication interface, and the communication interface is used for establishing communication connection with the terminal; the display panel is in bidirectional communication connection with the controller through the second power switch key.

9. The pendulum friction coefficient measuring instrument according to claim 1, wherein a handle is provided at an upper end of the column.

10. The pendulum friction coefficient measuring instrument according to claim 9, wherein the handle is made of an aluminum alloy.