Discrete element simulation parameter measuring device and method

Abstract

The invention discloses a discrete element simulation parameter measuring device and method.The discrete element simulation parameter measuring device comprises a measuring box, a discharging mechanism is installed at one end of the top of the measuring box, a conveying belt is installed at the bottom of the discharging mechanism, a positioning mechanism is installed on one side of the conveying belt, and a height adjusting mechanism is installed on the other side of the top of the measuring box; a repose angle measuring mechanism is installed at the end, close to the height adjusting mechanism, in a cavity of the measuring box, a man-machine interaction screen is installed at the end, close to the discharging assembly, of the measuring box, and multiple sets of keys are installed at the bottom of the man-machine interaction screen. The falling height can be adjusted through the height adjusting mechanism, measurement is more accurate, the lifting speed can be controlled by arranging the repose angle measuring mechanism, the repose angle measuring precision can be improved, a material motion image and measured parameter values can be displayed in real time through the arranged man-machine interaction screen, the measuring process is visualized, and measured values are more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of simulation parameter measurement experiment, in particular to a discrete element simulation parameter measurement device and method. BACKGROUND

[0002] Discrete element simulation method (Discrete Element Method) is a numerical simulation method, which is specially used for solving the problem of discontinuous medium. It discretizes the solution space into a discrete element cell array, and predicts the behavior of the particle system by simulating the interaction and movement between particles. This method is widely used in geotechnical engineering, particle material handling, powder process design and other fields. The main purpose is to simulate the behavior of particles by numerical simulation, to help engineers and scientists optimize design and process parameters in the design and development process, reduce the number of experiments, and reduce cost and cycle.

[0003] When using discrete element simulation, a large number of parameters are needed, such as collision restitution coefficient, static friction coefficient, dynamic friction coefficient, and angle of repose. However, in the experiment, each parameter needs an instrument, and when measuring the collision restitution coefficient, it needs to ensure that it is falling vertically, which is cumbersome to operate and has large measurement error. When measuring the static friction coefficient and the dynamic friction coefficient, the material state and the inclination angle need to be observed, which is easy to produce large error. When measuring the angle of repose, if there is error in the shooting angle or observation angle, it will produce large error in measurement, and the work efficiency is low. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] Therefore, the purpose of the present application is to provide a discrete element simulation parameter measurement device and method to solve the problems in the background art.

[0006] To solve the above technical problems, according to one aspect of the present application, the present application provides the following technical scheme:

[0007] A discrete element simulation parameter measurement device comprises:

[0008] A measurement box;

[0009] A feeding mechanism is arranged at one end of the top of the measurement box for material supply;

[0010] A conveying mechanism is arranged below the feeding mechanism to convey the material;

[0011] A positioning mechanism is arranged on one side of the conveying mechanism and used for guiding and positioning the material.

[0012] A height adjusting mechanism is arranged on the other side of the top of the measuring box and below the positioning mechanism and used for adjusting the falling height of the material.

[0013] A rest angle measuring mechanism is arranged at one end of the measuring box close to the height adjusting mechanism and used for measuring the rest angle.

[0014] A man-machine interaction screen is arranged at one end of the measuring box close to the discharging mechanism, the bottom of the man-machine interaction screen is provided with a plurality of groups of keys, and the man-machine interaction screen is used for displaying the measurement information and operation control.

[0015] As a preferred scheme of the discrete element simulation parameter measuring device, the discharging mechanism is a detachable and replaceable component, the discharging end of the discharging mechanism is close to the conveying mechanism, and the conveying mechanism comprises a conveying belt.

[0016] As a preferred scheme of the discrete element simulation parameter measuring device, the positioning mechanism comprises a conveying motor, a fixed wheel and a clamping belt, the conveying motor is symmetrically distributed on both sides of the top of the measuring box and above the conveying mechanism, the fixed wheel is arranged in parallel with the conveying motor and above the height adjusting mechanism, and the clamping belt is arranged between the fixed wheel and the conveying motor.

[0017] As a preferred scheme of the discrete element simulation parameter measuring device, one side of the clamping belt close to the conveying motor is provided with a tensioning wheel, and the other side close to the fixed wheel is provided with a moving wheel, the top of the moving wheel is nested and arranged on the top of the measuring box.

[0018] As a preferred scheme of the discrete element simulation parameter measuring device, the top of the moving wheel is connected with a moving cylinder, the central position of the top of the measuring box corresponding to the moving wheel is provided with an infrared sensor, and the infrared sensor is electrically connected with the moving cylinder and the conveying motor.

[0019] As a preferred scheme of the discrete element simulation parameter measuring device, the height adjusting mechanism comprises a first advancing motor, a second advancing motor and a lifting plane, the first advancing motor is arranged between the tensioning wheel and the moving wheel, the second advancing motor is arranged on the side away from the infrared sensor, and the lifting plane is arranged directly below the moving wheel.

[0020] As a kind of discrete element simulation parameter measurement device described in the application, one preferred scheme, wherein, the two sides of the lifting plane are connected with steel wire one and steel wire two respectively, the steel wire one is located between tensioning wheel and action wheel, and the other end of the steel wire one is connected on the output shaft of motor one, the steel wire two is located on the side of infrared sensor, and the other end of the steel wire two is connected on the output shaft of motor two, the inclination sensor is installed on the lifting plane, and the magnetic stripe is nestedly installed in the center of the lifting plane.

[0021] As a kind of discrete element simulation parameter measurement device described in the application, one preferred scheme, wherein, the repose angle measuring mechanism includes winch, push cylinder and sleeve, the winch is arranged on the outside of measuring box, and the output end of the winch is connected with steel wire rope, the other end of the steel wire rope is connected with sleeve;The push cylinder is arranged on the side of winch, and the output end of the push cylinder is connected with roller, and the roller is located on the same horizontal plane with the output end of winch.

[0022] As a kind of discrete element simulation parameter measurement device described in the application, one preferred scheme, wherein, the sleeve is installed with vibration piece around, the buffer piece is installed on the side close to sleeve in the cavity of measuring box, the dial is installed on the side close to lifting plane in the cavity of measuring box, the cleaning door is connected on the side opposite to dial of measuring box, and the high-speed camera is installed in the center of cleaning door.

[0023] A discrete element simulation parameter measurement method, steps are as follows:

[0024] S1, the material to be measured is conveyed to the conveying mechanism by the blanking mechanism, and the material is conveyed to the positioning mechanism by the conveying mechanism;

[0025] S2, the positioning mechanism clamps the material and conveys it to the upper side of height adjusting mechanism, when the infrared sensor detects the material, the positioning mechanism releases the material, so that the material falls vertically;

[0026] S3, the falling height is adjusted by height adjusting mechanism, the falling and rebounding process of material is recorded by high-speed camera, and the parameters are obtained by combining dial;

[0027] S4, the inclination of the lifting plane of height adjusting mechanism is controlled, the inclination angle is obtained by inclination sensor, and the friction coefficient is calculated based on force analysis;

[0028] S5, the sleeve is moved to the lifting plane and fixed, the material is added into the sleeve, the material is compacted by vibration piece, the sleeve is controlled to lift and separate from the material, the material accumulation form is photographed by high-speed camera, and the repose angle is calculated;

[0029] S6, the measurement process image and parameter value are displayed in real time by man-machine interaction screen, and the measurement data record is completed.

[0030] Compared with the prior art, the present application has the beneficial effect that the parameter measurement of the collision restitution coefficient, the maximum static friction coefficient, the dynamic friction coefficient and the repose angle (stacking angle) required by the discrete element simulation is completed by the measuring device; the clamping and transportation of the measured material can be realized by the positioning mechanism, and when the infrared sensor senses that the material arrives, the positioning mechanism stops transportation, and the action wheel is recovered, thereby realizing the vertical falling of the material, reducing the experimental error, and the height adjusting mechanism can adjust the height according to the characteristics of different materials during the collision restitution coefficient measurement, thereby improving the practicability of the device; the repose angle measurement mechanism can realize the measurement of the repose angle, and the magnetic strip can make the sleeve stably fall in the center of the lifting platform, and the vibration sheet can make the material distribution more compact.

[0031] The height adjusting mechanism can make the lifting platform horizontal and located in front of the high-speed camera, thereby reducing the repose angle (stacking angle) measurement error; the high-speed camera, the human-computer interaction screen and the keys can realize the switching of the multiple parameter measurement functions, and the real-time position of the material falling and the falling parameter curve are displayed on the human-computer interaction screen during the collision restitution coefficient measurement, the real-time material state and the inclination angle are displayed during the static friction coefficient and dynamic friction coefficient measurement, and the lifting speed can be controlled during the stacking angle measurement, the image boundary extraction is realized, and the data is displayed on the human-computer interaction screen, thereby improving the repose angle measurement precision. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the present application will be described in detail below with reference to the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them:

[0033] Figure 1 The static friction coefficient and dynamic friction coefficient analysis diagram provided by the present application is shown in the following figure:

[0034] Figure 2 The overall structure diagram of the discrete element simulation parameter measuring device of the present application is shown in the following figure:

[0035] Figure 3 The cross-sectional structure diagram of the discrete element simulation parameter measuring device of the present application is shown in the following figure:

[0036] Figure 4 The structure diagram of the positioning mechanism of the discrete element simulation parameter measuring device of the present application is shown in the following figure:

[0037] Figure 5 The height adjusting mechanism structure diagram of the discrete element simulation parameter measuring device of the present application is shown in the following figure:

[0038] Figure 6 It is a lifting plane structure schematic view of a discrete element simulation parameter measuring device of the present application;

[0039] Figure 7 It is a buffer sheet structure schematic view of a discrete element simulation parameter measuring device of the present application;

[0040] Figure 8 It is a sleeve structure schematic view of a discrete element simulation parameter measuring device of the present application. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0042] Figures 2-8 It is a structure schematic view of a discrete element simulation parameter measuring device of the present embodiment, please refer to Figures 2-8 The discrete element simulation parameter measuring device of the present embodiment comprises a measuring box 1, a discharging mechanism 2, a conveying mechanism, a positioning mechanism 4, a height adjusting mechanism 5, a rest angle measuring mechanism 6 and a man-machine interaction screen 10.

[0043] The discharging mechanism 2 is installed at one end of the top of the measuring box 1, and the discharging mechanism 2 is a detachable replacement component, which can be replaced into a single discharging mechanism or multiple discharging mechanisms 2 according to the needs of the prior art. The conveying mechanism (i.e. the conveying belt 3) is installed at the bottom of the discharging mechanism 2, and the discharging hole of the discharging mechanism 2 is close to the conveying belt 3, so that the material can be prevented from bouncing greatly when discharging from the discharging mechanism 2, and the experimental measurement data can be prevented from being affected.

[0044] The positioning mechanism 4 is installed on one side of the conveying belt 3, and the positioning mechanism 4 comprises a conveying motor 411, wherein the conveying motor 411 is distributed on both sides of the top of the measuring box 1 and located above the conveying belt 3. A fixed wheel 414 is installed in parallel to the conveying motor 411, and a clamping belt 415 is installed between the conveying motor 411 and the fixed wheel 414. It is worth noting that the fixed wheel 414 is located above the height adjusting mechanism 5, so that the positioning mechanism 4 can be clamped from the conveying belt 3 to the top of the height adjusting mechanism 5. The positioning mechanism 4 mainly clamps the material by mutual extrusion between the clamping belts 415, and then drives the material to move to the top of the height adjusting mechanism 5 by driving the clamping belts 415 through the conveying motor 411.

[0045] The clamping belt 415 is installed with a tensioning wheel 412 near one side of the conveying motor 411, and the clamping belt 415 is installed with a moving wheel 413 near one side of the fixed wheel 414, and the top of the moving wheel 413 is nestedly installed on the top of the measuring box 1, wherein the tensioning wheel 412 can be manually adjusted according to the material type, so that the clamping belt 415 can clamp the material.

[0046] The moving wheel 413 is nestedly installed on the top of the measuring box 1, and a moving cylinder 421 is connected to the top of the moving wheel 413, and the function of the moving wheel 413 is similar to that of the tensioning wheel 412, and is used to adjust the distance between the clamping belts 415 to clamp the material, and an infrared sensor 431 is installed in the center of the measuring box 1 on the top of the moving wheel 413, and the infrared sensor 431 is electrically connected with the moving cylinder 421, when the infrared sensor 431 senses the arrival of the material, an electrical signal is transmitted to the moving cylinder 421 and the conveying motor 411, so that the conveying motor 411 stops rotating, and at the same time the moving cylinder 421 drives the moving wheel 413 to move backward, so that the distance between the clamping belts 415 is increased, so that the material can vertically fall from the clamping belts 415, reducing experimental errors.

[0047] A height adjusting mechanism 5 is installed on the other side of the top of the measuring box 1, the height adjusting mechanism 5 comprises a progress motor one 51, a progress motor two 52 and a lifting plane 53, wherein the progress motor one 51 is installed between the tensioning wheel 412 and the moving wheel 413, the progress motor two 52 is installed on the side away from the infrared sensor 431, and the lifting plane 53 is located directly below the moving wheel 413, and a steel wire one 511 and a steel wire two 521 are connected on both sides of the lifting plane 53 respectively.

[0048] It is worth noting that the steel wire one 511 is located between the tensioning wheel 412 and the moving wheel 413, and the other end of the steel wire one 511 is connected to the output shaft of the progress motor one 51, the steel wire two 521 is located on the side of the infrared sensor 431, and the other end of the steel wire two 521 is connected to the output shaft of the progress motor two 52, that is, if the progress motor one 51 and the progress motor two 52 are simultaneously forward or reverse, the lifting plane 53 vertically rises or falls, and if only one of the progress motor one 51 and the progress motor two 52 is forward or reverse, the lifting plane 53 will have an inclination.

[0049] By controlling the progress motor one 51 and the progress motor two 52 to be simultaneously forward or reverse, the vertical rising or falling of the lifting plane 53 can be adjusted, so that the relative height of the material vertically falling from the clamping belt 415 can be changed, so that the height can be adjusted according to the characteristics of different materials, improving the practicability of the device, and the experimental data error can be reduced by adjusting different heights.

[0050] The inclination sensor 531 is installed on the lifting plane 53. When the forward rotation of the motor 1 51 and the motor 2 52 is further increased, the inclination is generated. The inclination value is transmitted to the display screen 10 by the inclination sensor 531, and the inclination of the lifting plane 53 is displayed. The purpose of the inclination of the lifting plane 53 is to generate the friction force of the object on the lifting plane 53, and the friction factor is calculated according to the inclination value.

[0051] The calculation of the friction factor is based on the force analysis shown in Figure 1 The angle is θ, the gravity mgf=F=mg*sinθ

[0052] N=mg*cosθ

[0053] The decomposition into the horizontal plane and the vertical plane f=μ*N, and it can be seen that μ=f / N=tanθ. The inclination value can be used to calculate the friction factor.

[0054] The rest angle measuring mechanism 6 is installed near the height adjusting mechanism 5 in the cavity of the measuring box 1. The rest angle measuring mechanism 6 includes a winch 61 and a push cylinder 63. The winch 61 is installed on one side of the outside of the measuring box 1. A steel wire rope 611 is connected to the output end of the winch 61. A sleeve 62 is connected to the other end of the steel wire rope 611. The steel wire rope 611 is wound by the forward and reverse rotation of the winch 61, and the upward and downward movement of the sleeve 62 is realized.

[0055] It is worth noting that the push cylinder 63 is installed on one side of the winch 61. A roller 631 is connected to the output end of the push cylinder 63, and the roller 631 is in the same horizontal plane as the output end of the winch 61. The movement of the push cylinder 63 pushes the roller 631 to move forward and backward. When the winch 61 is unwinding, the push cylinder 63 pushes the roller 631 forward at the same time, so that the sleeve 62 moves forward and reaches the lifting plane 53. The magnetic stripe 532 is embedded in the center of the lifting plane 53. The magnetic stripe 532 can make the sleeve 62 be adsorbed on the lifting plane 53. When it is needed to make the sleeve 62 leave the lifting plane 53, the winch 61 first winds the steel wire rope 611. When the material in the sleeve 62 completely separates from the sleeve 62, the push cylinder 63 pushes the roller 631 to move backward, so that the sleeve 62 moves backward. The buffer sheet 64 is installed near the sleeve 62 in the cavity of the measuring box 1. When the sleeve 62 moves backward, it finally reaches the buffer sheet 64. The relative fixation of the position of the sleeve 62 is realized.

[0056] The vibration sheet 621 is installed around the sleeve 62, which can make the material in the sleeve 62 more compact and reduce the error of the experiment.

[0057] The scale disc 7 is installed near the lifting plane 53 in the cavity of the measuring box 1. The scale disc 7 helps to observe the material bounce height and improves the accuracy of the experimental value.

[0058] A cleaning door 8 is connected to the side of the measuring box 1 opposite the dial 7, and the cleaning door 8 can be opened to clean the material in the measuring box 1. A high-speed camera 9 is installed in the center of the cleaning door 8, and a display screen 10 is installed at the end of the measuring box 1 close to the discharging assembly 2. A plurality of keys 11 are installed at the bottom of the display screen 10. The high-speed camera 9 captures the measurement process and displays it in real time through the display screen 10, and also displays the measurement value.

[0059] In combination Figures 1-8 The specific operation steps of the discrete element simulation parameter measuring device are as follows:

[0060] Turn on the power supply, and select the measured discrete element simulation parameter through the keys. When measuring the coefficient of restitution, first make the material fall alone through the discharging mechanism 2, and then make the material move horizontally to the infrared sensor 431, and then make the material move vertically downward. During the movement, the high-speed camera 9 records the process through multiple exposures, and transmits the data to the display screen 10. The height of the lifting plane can be adjusted individually according to the needs during the test.

[0061] When measuring the friction coefficient, open the cleaning door 8, place the material in the center of the lifting plane 53, and then close the cleaning door 8. By controlling the forward rotation of the first motor 51 and the second motor 52, an inclination angle is generated. The inclination angle sensor 531 can transmit the inclination angle value to the display screen 10 for display. The purpose of generating the inclination angle of the lifting plane 53 is to generate friction on the object on the lifting plane 53, and the friction coefficient is calculated according to the inclination angle value.

[0062] When measuring the coefficient of rest angle, control the winch 61 to pay out the wire, and at the same time, push the cylinder 63 to push the roller 631 forward, so that the sleeve 62 moves forward and reaches the lifting plane 53. The magnetic strip 532 on the lifting plane 53 can attract the sleeve 62. Then, select the discharging assembly 2 to discharge or open the cleaning door 8 to place the material directly. During the placement process, the vibration piece 621 vibrates to make the material in the sleeve 62 more compact, reducing the error of the experiment. When the sleeve 62 needs to move away from the lifting plane 53, the winch 61 first winds up the steel wire rope 611. When the material in the sleeve 62 is completely separated from the sleeve 62, the cylinder 63 pushes the roller 631 to move backward, so that the sleeve 62 moves backward and finally reaches the buffer piece 64, achieving the relative fixation of the position of the sleeve 62. The lifting assembly 5 can make the lifting plane 53 horizontal and located in front of the high-speed camera. Then, the high-speed camera 9 extracts the image boundary and displays the data on the display screen, and fits the inclination angle through the computer, and then calculates the rest angle.

[0063] Although the present application has been described with reference to the embodiments above, various changes and modifications can be suggested to one skilled in the art, and it is intended that the present application encompass such changes and modifications as fall within the scope of the appended claims. Particularly, each feature disclosed in the description and / or the claims can be used in the combination with each of the features disclosed in the description and / or the claims, unless specifically stated otherwise. Therefore, the present application is not intended to be limited to the particular embodiments disclosed in the description and / or the claims.

Claims

1. A discrete element simulation parameter measurement apparatus, characterized by, Include: Measuring box (1); Discharging mechanism (2) is arranged at one end of the top of the measuring box (1), which is used for material supply; Conveying mechanism, arranged below the discharging mechanism (2), for conveying materials; Positioning mechanism (4) is arranged on one side of the conveying mechanism, which is used for guiding and positioning the material; Height adjusting mechanism (5) is arranged on the other side of the top of the measuring box (1) and below the positioning mechanism (4), which is used for adjusting the falling height of the material; Rest angle measuring mechanism (6) is arranged at one end of the measuring box (1) close to the height adjusting mechanism (5), which is used for measuring the rest angle; Human-computer interaction screen (10) is arranged at one end of the measuring box (1) close to the discharging mechanism (2), and the bottom of the human-computer interaction screen (10) is provided with a plurality of groups of keys (11), which is used for displaying measurement information and operation control.

2. A discrete element simulation parameter measurement apparatus according to claim 1, wherein, The discharging mechanism (2) is a detachable replacement component, and the discharge end is close to the conveying mechanism, and the conveying mechanism comprises a conveying belt (3).

3. A discrete element simulation parameter measurement apparatus according to claim 1, wherein, The positioning mechanism (4) comprises a conveying motor (411), a fixed wheel (414) and a clamping belt (415), the conveying motor (411) is symmetrically distributed on both sides of the top of the measuring box (1) and above the conveying mechanism, the fixed wheel (414) is arranged in parallel with the conveying motor (411) and above the height adjusting mechanism (5), and the clamping belt (415) is arranged between the fixed wheel (414) and the conveying motor (411).

4. A discrete element simulation parameter measurement apparatus according to claim 3, wherein, One side of the clamping belt (415) close to the conveying motor (411) is provided with a tensioning wheel (412), and the other side close to the fixed wheel is provided with a moving wheel (413), and the top of the moving wheel (413) is nested and installed on the top of the measuring box (1).

5. A discrete element simulation parameter measurement apparatus according to claim 4, wherein, The top of the moving wheel (413) is connected with an action cylinder (421), the top of the measuring box (1) is provided with an infrared sensor (431) corresponding to the central position of the moving wheel (413), and the infrared sensor (431) is electrically connected with the action cylinder (421) and the conveying motor (411).

6. A discrete element simulation parameter measurement apparatus according to claim 5, wherein, The height adjusting mechanism (5) comprises a first motor (51), a second motor (52) and a lifting plane (53), the first motor (51) is installed between the tensioning wheel (412) and the moving wheel (413), the second motor (52) is installed on the side away from the infrared sensor (431), and the lifting plane (53) is located directly below the moving wheel (413).

7. A discrete element simulation parameter measurement apparatus according to claim 6, wherein, The lifting plane (53) is connected with a steel wire one (511) and a steel wire two (521) on both sides, the steel wire one (511) is located between the tensioning wheel (412) and the moving wheel (413), and the other end of the steel wire one (511) is connected to the output shaft of the first motor (51), the steel wire two (521) is located on one side of the infrared sensor (431), and the other end of the steel wire two (521) is connected to the output shaft of the second motor (52), the lifting plane (53) is provided with an inclination sensor (531), and the lifting plane (53) is nested and installed with a magnetic stripe (532).

8. A discrete element simulation parameter measurement apparatus according to claim 6, wherein, The rest angle measuring mechanism (6) comprises a winch (61), a pushing cylinder (63) and a sleeve (63), the winch (61) is arranged on one side outside the measuring box (1), the output end of the winch (61) is connected with a steel wire rope (611), the other end of the steel wire rope (611) is connected with the sleeve (63); the pushing cylinder (63) is arranged on one side of the winch (61), the output end of the pushing cylinder (63) is connected with a roller (631), the roller (631) is located on the same horizontal plane with the output end of the winch (61).

9. A discrete element simulation parameter measurement apparatus according to claim 8, wherein, The sleeve (62) is provided with a vibrating plate (621) around, the side close to the sleeve (62) in the cavity of the measuring box (1) is provided with a buffer plate (64), the side close to the lifting plane (53) in the cavity of the measuring box (1) is provided with a scale dial (7), the side of the measuring box (1) opposite to the scale dial (7) is connected with a cleaning door (8), the central part of the cleaning door (8) is provided with a high-speed camera (9).

10. A measurement method of a discrete element simulation parameter measurement apparatus according to any one of claims 1 to 9, characterized by, The steps are as follows: S1, conveying the material to be measured to the conveying mechanism by the discharging mechanism (2), and conveying the material to the positioning mechanism (4) by the conveying mechanism; S2, the positioning mechanism (4) clamps the material and conveys it above the height adjusting mechanism (5), when the infrared sensor (431) detects the material, the positioning mechanism (4) releases the material, so that the material falls vertically; S3, adjusting the falling height by the height adjusting mechanism (5), recording the falling and rebounding process of the material by the high-speed camera (9), and obtaining parameters by the scale dial (7); S4, controlling the inclination of the lifting plane (53) of the height adjusting mechanism (5), obtaining the inclination angle by the inclination sensor (531), and calculating the friction coefficient based on force analysis; S5, moving the sleeve to the lifting plane (53) and fixing it, adding material into the sleeve (63), compacting the material by the vibrating plate (621), controlling the sleeve (63) to lift and separate from the material, and shooting the material accumulation form by the high-speed camera (9) and calculating the rest angle; S6, displaying the measurement process image and parameter value in real time by the man-machine interaction screen (10), and completing the measurement data record.

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