CN107505259A - A kind of rotary skin-friction coefficient test system and method for testing - Google Patents
A kind of rotary skin-friction coefficient test system and method for testing Download PDFInfo
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- CN107505259A CN107505259A CN201710711023.7A CN201710711023A CN107505259A CN 107505259 A CN107505259 A CN 107505259A CN 201710711023 A CN201710711023 A CN 201710711023A CN 107505259 A CN107505259 A CN 107505259A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention discloses a kind of rotary skin-friction coefficient test system, including level table, adjustable baffle plate, fixed dam and rotation loading device, level table is used to fix floor to be measured, rotation loading device includes the motor from top to bottom set gradually, disk and standard weight, sensor is provided with the disk, the motor is connected by a machine shaft with the sensors topside, the bottom of the sensor is connected by a connection component with the standard weight, connection has elastic component between the sensor and the disk, under original state, the flexible member does not deform upon.The invention also discloses a kind of method of testing of rotary skin-friction coefficient test system, and the test system structure is simple, compact, operation are easy, and the test process is closer to virtual condition, and test result is more accurate, with more referential and science.
Description
Technical field
The invention belongs to Sports floor mapping surface properties technical field field, and in particular to a kind of rotary mantle friction
Coefficient test system and method for testing.
Background technology
Sports floor sliding properties require that the coefficient of friction of floor surface is appropriate, if frictional force is excessive, sportsman exists
Easily fallen down when stopping suddenly in motion process, and increase floor to player feet's muscle and the load of ligament, make sportsman
Too fast is tired or injured；, whereas if frictional force is too small, sportsman easily slides out when stopping suddenly during exercise, influences to transport
The performance of technical merit is mobilized, therefore the research for the mapping surface properties especially coefficient of friction of Sports floor seems particularly
It is important.
Relative motion state between sportsman's sole and Sports floor surface layer is usually relative static conditions, therefore static friction
Power more can the feature of actual response Sports floor in use with confficient of static friction.On the one hand, in the prior art, floor
The generally test of skin-friction coefficient method of testing is mainly the coefficient of kinetic friction, and its test result fully actual response can not move
Operative condition of the member in motion process with Sports floor, detection method are difficult to reflect the actual motion effect of sportsman.For
The improvement and assessment of the Sports floor surface property of specialty cause certain obstruction, are unfavorable for wooden Sports floor surface property
The application and popularization of standardized testing.
The content of the invention
To solve above technical problem, the present invention provides a kind of simple in construction, compact, operation readily rotary table
Face PVvalue testing system and method for testing, the test process is closer to virtual condition, and test result is more accurate, with more ginseng
The property examined and science.
To achieve the above object, the invention provides following scheme：
The present invention provides a kind of rotary skin-friction coefficient test system, including level table, adjustable baffle plate, fixation
Baffle plate and rotation loading device, the level table, the adjustable baffle plate and the fixed dam are used to fix floor to be measured,
The rotation loading device includes motor, disk and the standard weight from top to bottom set gradually, is provided with and passes in the disk
Sensor, the motor are connected by a machine shaft with the sensors topside, and the bottom of the sensor passes through a connection group
Part is connected with the standard weight, connects and has elastic component between the sensor and the disk, under original state, the bullet
Property element does not deform upon.
Optionally, one end of the level table connects a fixed dam, and the other end of the level table is provided with one
Adjustable baffle plate, the adjustable baffle plate are connected by regulating bolt with another fixed dam, another fixed dam
Axially arranged to have the internal thread coordinated with the regulating bolt, each fixed dam upper end is hinged with a fixation girder steel, each institute
State the other end of fixed girder steel and the housing hinge of the motor；The connection component includes special-shaped connecting shaft and special-shaped axle sleeve,
The special-shaped connecting shaft outer cover is provided with the special-shaped axle sleeve, and the special-shaped connecting shaft can be in the special-shaped axle sleeve up and down
Mobile, the special-shaped axle sleeve is screwed with the standard weight；
Optionally, the centre position that the sensor is placed in inside the disk, the flexible member be provided with it is multiple, and
Multiple flexible members are symmetrical arranged on the center sensor；
Optionally, the flexible member both ends are respectively welded on the inwall and the sensor of the disk；
Optionally, the covers disposed on sensor is equipped with the first hook, and the second hook is provided with the inwall of the disk, described
Flexible member both ends connect with the described first hook and second hook respectively；
Optionally, the motor is the motor of constant rotational speed, and the angular speed of the motor is less than 6 °/s；
Optionally, the flexible member center symmetric setting has four or six；
Optionally, the flexible member is stainless steel spring, and the flexible member bears the scope of pulling force in 0.1N to 2N
Between；
The present invention also provides a kind of method of testing of rotary skin-friction coefficient test system, comprises the following steps：
A. simulation material is fixedly connected on the standard weight lower surface, the standard weight is fixed on the abnormity
Below axle sleeve；
B. the motor is opened, the motor drives the sensor rotation, the sensor by the machine shaft
Rotate and drive the flexible member elongation, the flexible member is gradually stretched and its suffered pulling force gradually increases the sensor
The pulling force that the flexible member applies to the sensor is transmitted defeated according to the sensor to a computer, the computer
The curve that the frictional resistance suffered by data generation simulation material sent changes over time, obtains maximum static friction force, static friction system
Number, force of sliding friction and the coefficient of sliding friction；
Optionally,
A, the curve changed over time according to the frictional resistance between simulation material and the floor to be measured, simulation material with
When between floor to be measured in the critical condition to slide and not yet slide, the pulling force suffered by the sensor is suffered by simulation material
Maximum static friction force F, the calculation formula of confficient of static friction is：
U=F/N
In formula：F maximum static friction forces；N is normal pressure suffered by floor；U is required confficient of static friction；
B, the curve changed over time according to the frictional resistance between simulation material and the floor to be measured, when standard weight
When relative motion occurring between floor to be measured, slip of the pulling force between simulation material and floor to be measured suffered by the sensor
Frictional force F ', coefficient of sliding friction u ' calculation formula are：
U '=F '/N
In formula：F ' is force of sliding friction；N is normal pressure suffered by floor；U ' is the required coefficient of sliding friction.
The present invention achieves following technique effect relative to prior art：
1st, rotary skin-friction coefficient test system of the invention is provided with rotation loading device, the PVvalue testing
System architecture is simple, compact, operation are easy, and test result is more accurate, can be trueer with more referential and science
Friction law between real reflection sportsman institute's wear shoes bottom and floor, has filled up the blank of coherent detection mode.
2nd, PVvalue testing system of the invention is opened by rotating loading device, applies one in standard weight
Gradual increased torsion centered on axle, it is maximum quiet when torsion increases to the maximum static friction force critical value of two kinds of material surfaces
Frictional force and torsion balance, now standard weight is still that inactive state can obtain maximum static friction force and coefficient of friction；Work as torsion
Power continues increase until relative displacement now frictional resistance occurs when being more than maximum static friction force, between standard weight and floor to be measured
It is reduced to force of sliding friction, and stress curve is drawn out by sensor feedback, force of sliding friction and sliding friction can be obtained
Coefficient.For the method for testing of rotary skin-friction coefficient test system closer to virtual condition, test result is more accurate, has more
Referential and science.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of rotary skin-friction coefficient test system front view in inventive embodiments；
Fig. 2 is a kind of disk top view of rotary skin-friction coefficient test system in inventive embodiments；
Fig. 3 is a kind of connection component schematic diagram of rotary skin-friction coefficient test system in inventive embodiments；
Fig. 4 is a kind of rotary skin-friction coefficient test system connection component A-A partial sectional views in inventive embodiments；
Fig. 5 is a kind of frictional resistance change of rotary skin-friction coefficient test system and test process in inventive embodiments
Curve；
Description of reference numerals：1st, fixed dam；2nd, floor to be measured；3rd, level table；4th, simulation material；5th, standard weight；
6th, disk；7th, flexible member；8th, sensor；9th, motor；10th, machine shaft；11st, fixed steelframe；12nd, special-shaped connecting shaft；13rd,
One hook；14th, the second hook；15th, screw；16th, special-shaped axle sleeve；17 adjustable baffle plates；18 regulating bolts.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide a kind of rotary skin-friction coefficient test system, the apparatus structure is simple effectively,
Equipment is compact, structure, and the test methods and procedures are closer to virtual condition, and test result is more accurate, with more referential and section
The property learned, the friction law that can more really reflect between sportsman institute's wear shoes bottom and floor, has filled up coherent detection mode
Blank, have great practical value.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying example, the present invention is further detailed explanation.
The present invention provides a kind of rotary skin-friction coefficient test system, as shown in figure 1, rotary skin-friction coefficient
Test system includes level table 3, adjustable baffle plate 17, fixed dam 1 and rotation loading device, level table 3, adjustable gear
Plate 17, fixed dam 1 are used to fix floor 2 to be measured, and rotation loading device includes motor 9, the disk 6 from top to bottom set gradually
And standard weight 5, disk 6 is interior to be provided with sensor 8, and motor 9 is connected with the top of sensor 8 by a machine shaft 10, sensed
The bottom of device 8 is connected by a connection component with standard weight 5, between sensor 8 and disk 6 connection have elastic component 7, initially
Under state, flexible member 7 does not deform upon, and motor 9 drives sensor 8 to rotate by a machine shaft 10, the rotational band of sensor 8
Dynamic elasticity element 7 extends, and flexible member 7 is gradually stretched and its suffered pulling force gradually increases sensor 8 by flexible member 7 to passing
The pulling force that sensor 8 applies is transmitted to a computer, and the data that computer conveys according to sensor 8 generate frictional resistance anaplasia at any time
The curve of change, obtain maximum static friction force, confficient of static friction, force of sliding friction and the coefficient of sliding friction.Simple in construction, small volume
Ingeniously, operation is easy, and test process is more accurate closer to virtual condition, test result.
In order to adapt to the simulation material of different dimensional heights, and improve the stabilization of rotary skin-friction coefficient test system
Property, in specific embodiment of the present invention, as shown in Figure 3 and Figure 4, one end of level table 3 connects a fixed dam 1, horizontal
The other end of table top 3 is provided with an adjustable baffle plate 17, and adjustable baffle plate 17 is connected by regulating bolt 18 and another fixed dam 1
Connect, another fixed dam 1 is axially arranged the internal thread coordinated with regulating bolt 18, and it is solid that each upper end of fixed dam 1 is hinged with one
Determine girder steel 11, can conveniently horizontal fixed floor 2 to be measured, by adjust adjustable bolt 18 can adjust adjustable baffle plate 17 with
The distance between another fixed dam 1, it is convenient to fix and change floor 2 to be measured；Each upper end of fixed dam 1 is hinged with a fixation steel
Beam 11, the other end of each fixed girder steel 11 and the housing hinge of motor 9；Connection component includes special-shaped connecting shaft 12 and special-shaped axle sleeve
16, special-shaped axle sleeve 16 is connected with standard weight 5, and the special-shaped outer cover of connecting shaft 12 is provided with special-shaped axle sleeve 16, and special-shaped connecting shaft 12
It can be moved up and down in special-shaped axle sleeve 16, enough installing spaces can be reserved to simulation material 4, standard weight 5, installed
Afterwards, can also by special-shaped connecting shaft 12 moving down in special-shaped axle sleeve 16 so that the lower surface of simulation material 4 is with treating
The upper surface of geodetic plate 2 contacts just, is easy to the progress of later stage friction test.
In specific embodiment of the present invention, as shown in Figure 3 and Figure 4, in order to facilitate special-shaped axle sleeve 16 and standard weight 5
Installation and removal, the special-shaped both ends of axle sleeve 16 are connected by screw 15 with standard weight 5, the mounting means so that special-shaped axle sleeve 16
It can be reused with standard weight 5, and after some parts damages, without whole replacings, need to only change the part of damage
, saved cost.
In specific embodiment of the present invention, as shown in Fig. 2 the centre position that sensor 8 is placed in inside disk 6, elasticity
Element 7 is provided with multiple, and multiple flexible members 7, on the center symmetric setting of sensor 8, flexible member 7 is stretched from stress and sent out
Weight range suffered by raw deformation to the stretcher strain limit should be between 0.1N to 2N so that device passes generally in poised state
Numerical value detected by sensor is also relatively more steady so that test result is more accurate.
The both ends of flexible member 7 are respectively welded on the inwall and the sensor 8 of disk 6.
Preferably, in order to improve the accuracy of experimental result, it is necessary to ensure flexible member 7 within service life, therefore
Through after deformation after a while, it is necessary to change flexible member 7 to ensure the authenticity of experimental result and accuracy, therefore in
In the specific embodiment of the present invention, the first hook 13 is provided with sensor 8, the second hook 14 is provided with the inwall of disk 6,
The both ends of flexible member 7 are connected with the first hook 13 and the second hook 14 respectively, it is preferred that the center symmetric setting of flexible member 7 has
Four or six, flexible member 7 needs to take off from the first hook 13 and the second hook 14, and it is convenient to change.
Preferably, motor 9 elects the motor of constant rotational speed as, using the teaching of the invention it is possible to provide stable output power.
Preferably, flexible member 7 is stainless steel spring, and stainless steel spring is simple in construction, low manufacture cost, greatlys save
Experimentation cost.
The method of testing of rotary skin-friction coefficient test system provided by the invention, comprises the following steps：
A. simulation material 4 is fixedly connected on the lower surface of standard weight 5, standard weight 5 is fixed under special-shaped axle sleeve 16
Side；
C. motor 9 is opened, motor 9 drives sensor 8 to rotate by machine shaft 10, the rotational band dynamic elasticity of sensor 8 member
Part 7 extends, and flexible member 7 is gradually stretched and its suffered pulling force gradually increases sensor 8 and applies flexible member 7 to sensor 8
The pulling force added is transmitted to a computer, the gradual increased torsion centered on axis applied to standard weight 5, works as torsion
When increasing to the maximum static friction force critical value of two kinds of material surfaces, maximum static friction force and torsion balance, now standard weight 5
Still maximum static friction force and coefficient of friction can be obtained for inactive state；When torsion continues increase until being more than maximum static friction force
When, now frictional resistance is reduced to force of sliding friction for 2 generation relative displacements between standard weight 5 and floor to be measured, and passes through sensing
Device feedback draws out stress curve, can obtain force of sliding friction and the coefficient of sliding friction.
In specific embodiment of the present invention, as shown in figure 5,
A, the curve changed over time according to the frictional resistance between simulation material 4 and floor to be measured 2, simulation material 4 with
When between floor 2 to be measured in the critical condition to slide and not yet slide, the pulling force suffered by sensor 8 is suffered by simulation material 4
Maximum static friction force F, the calculation formula of confficient of static friction is：
U=F/N
In formula：F maximum static friction forces；N is normal pressure suffered by floor；U is required confficient of static friction；
B, the curve changed over time according to the frictional resistance between simulation material 4 and floor to be measured 2, when standard weight 5
When relative motion occurring between floor 2 to be measured, slip of the pulling force between simulation material 4 and floor to be measured 2 suffered by sensor 8
Frictional force F ', coefficient of sliding friction u ' calculation formula are：
U '=F '/N
In formula：F ' is force of sliding friction；N is normal pressure suffered by floor；U ' is required coefficient of sliding friction
Final result is shown, can not be measured confficient of static friction using traditional pendulum type friction coefficient measuring instrument, can only be measured
The coefficient of kinetic friction, the measurement result of the coefficient of kinetic friction is 0.45, but utilizes the rotary skin-friction coefficient test of the present invention
System, which can not only measure the coefficient of kinetic friction, can also obtain confficient of static friction, the coefficient of kinetic friction 0.46, and confficient of static friction is
0.53, rotary skin-friction coefficient test system and method for testing of the invention can more really reflect that sportsman is worn
Friction law between sole and floor, the data have more relative to the measurement result of traditional pendulum type friction coefficient measuring instrument
Convincingness.
As can be seen here, rotary skin-friction coefficient test system and method for testing of the invention, simple in construction, small volume
Ingeniously, operation is easy, and test result is more accurate, with more referential and science, can more really reflect that sportsman is worn
Friction law between sole and floor, the blank of coherent detection mode is filled up.
It is set to not it should be noted that the flexible member in the rotary skin-friction coefficient test system of the present invention differs
Become rusty steel spring, as long as with flexible member that is certain elastic and can voluntarily recovering, motor, which also differs, is set to constant rotational speed
Motor, as long as the motor of stable output power can be provided.
Apply specific case in this specification to be set forth the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method and its core concept；Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, in specific embodiments and applications there will be changes.In summary, in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
- A kind of 1. rotary skin-friction coefficient test system, it is characterised in that：Including level table (3), adjustable baffle plate (17), fixed dam (1) and rotation loading device, the level table (3), the adjustable baffle plate (17) and the fixed gear Plate (1) is used to fix floor to be measured (2), and the rotation loading device includes motor (9), the disk from top to bottom set gradually (6) and standard weight (5), be provided with sensor (8) in the disk (6), the motor (9) by a machine shaft (10) and Being connected at the top of the sensor (8), the bottom of the sensor (8) is connected by a connection component with the standard weight (5), It is connected have elastic component (7) between the sensor (8) and the disk (6), under original state, the flexible member (7) is not Deform upon.
- 2. rotary skin-friction coefficient test system according to claim 1, it is characterised in that：The level table (3) one end connects a fixed dam (1), and the other end of the level table (3) is provided with an adjustable baffle plate (17), described Adjustable baffle plate (17) is connected by regulating bolt (18) with another fixed dam (1), another fixed dam (1) axle To the internal thread being provided with the regulating bolt (18) cooperation, each fixed dam (1) upper end is hinged with a fixation girder steel (11), the housing hinge of the other end of each fixed girder steel (11) and the motor (9)；The connection component includes abnormity even Spindle (12) and special-shaped axle sleeve (16), special-shaped connecting shaft (12) outer cover are provided with the special-shaped axle sleeve (16), and described different Shape connecting shaft (12) can move up and down in the special-shaped axle sleeve (16), the special-shaped axle sleeve (16) and the standard weight (5) it is fixed by screw (15).
- 3. rotary skin-friction coefficient test system according to claim 1, it is characterised in that：The sensor (8) It is placed in the internal centre position of the disk (6), the flexible member (7) is provided with multiple, and multiple flexible members (7) On the sensor (8) center symmetric setting.
- 4. rotary skin-friction coefficient test system according to claim 3, it is characterised in that：The flexible member (7) both ends are respectively welded on the inwall and the sensor (8) of the disk (6).
- 5. rotary skin-friction coefficient test system according to claim 3, it is characterised in that：The sensor (8) On be provided with the first hook (13), the second hook (14), the flexible member (7) two are provided with the inwall of the disk (6) End is connected with the described first hook (13) and second hook (14) respectively.
- 6. rotary skin-friction coefficient test system according to claim 1, it is characterised in that：The motor (9) is The motor of constant rotational speed, the angular speed of the motor (9) are less than 6 °/s.
- 7. rotary skin-friction coefficient test system according to claim 1, it is characterised in that：The flexible member (7) center symmetric setting has four or six.
- 8. the rotary skin-friction coefficient test system stated according to claim 7, it is characterised in that：The flexible member (7) For stainless steel spring, the flexible member (7) bears the scope of pulling force between 0.1N to 2N.
- 9. the method for testing of the rotary skin-friction coefficient test system according to any one of claim 1-8, it is special Sign is：Comprise the following steps：A. simulation material (4) is fixedly connected on standard weight (5) lower surface；B. the motor (9) is opened, the motor (9) drives the sensor (8) to rotate by the machine shaft (10), institute State sensor (8) and rotate drive flexible member (7) elongation, the flexible member (7) is gradually stretched and its suffered pulling force Gradually increase the sensor (8) to transmit the pulling force that the flexible member (7) applies the sensor (8) to a calculating Machine, the frictional resistance suffered by data generation simulation material (4) that the computer is conveyed according to the sensor (8) anaplasia at any time The curve of change, obtain maximum static friction force, confficient of static friction, force of sliding friction and the coefficient of sliding friction.
- 10. the method for testing of rotary skin-friction coefficient test system according to claim 9：It is characterized in that：A, the curve changed over time according to the frictional resistance between simulation material (4) and the floor to be measured (2), simulation material (4) when between floor to be measured (2) in the critical condition to slide and not yet slide, the pulling force suffered by the sensor (8) is Maximum static friction force F suffered by simulation material (4), the calculation formula of confficient of static friction are：U=F/NIn formula：F maximum static friction forces；N is normal pressure suffered by floor；U is required confficient of static friction；B, the curve changed over time according to the frictional resistance between simulation material (4) and the floor to be measured (2), when standard weight When relative motion occurring between thing (5) and floor to be measured (2), pulling force suffered by the sensor (8) for simulation material (4) with it is to be measured Force of sliding friction F ' between floor (2), coefficient of sliding friction u ' calculation formula are：U '=F '/NIn formula：F ' is force of sliding friction；N is normal pressure suffered by floor；U ' is the required coefficient of sliding friction.
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| CN201710711023.7A CN107505259B (en) | 2017-08-18 | 2017-08-18 | A kind of rotary skin-friction coefficient test macro and test method |
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| CN201710711023.7A CN107505259B (en) | 2017-08-18 | 2017-08-18 | A kind of rotary skin-friction coefficient test macro and test method |
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| CN107505259B CN107505259B (en) | 2019-11-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490159A (en) * | 2018-01-29 | 2018-09-04 | 北京建工四建工程建设有限公司 | Newly mix cement-based material pump-conveying property test device and its test method |
| CN109507106A (en) * | 2018-11-19 | 2019-03-22 | 东北大学 | Snowfield friction coefficient measuring apparatus and measurement method |
| CN109932312A (en) * | 2018-07-19 | 2019-06-25 | 中国石油大学(华东) | Pipeline cleaner seal rubber disk testing device for friction coefficient and test method |
| CN112557297A (en) * | 2020-12-11 | 2021-03-26 | 河北省产品质量监督检验研究院 | Method for measuring sliding friction coefficient between two materials |
| CN113418860A (en) * | 2021-06-08 | 2021-09-21 | 法士特伊顿(西安)动力传动系统有限责任公司 | Mechanism for measuring friction force/friction coefficient and measuring method thereof |
| CN114544484A (en) * | 2022-04-26 | 2022-05-27 | 国机传感科技有限公司 | Test device and method for measuring static friction coefficient of tire |
| CN114778364A (en) * | 2022-06-20 | 2022-07-22 | 江苏悦展新型材料有限公司 | Special-shaped refractory brick wear resistance detection device |
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|---|---|---|---|---|
| CN1717580A (en) * | 2002-11-20 | 2006-01-04 | 腾凯特塞奥隆公司 | Device for measuring the static and/or dynamic friction coefficient of a surface |
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2017
- 2017-08-18 CN CN201710711023.7A patent/CN107505259B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1717580A (en) * | 2002-11-20 | 2006-01-04 | 腾凯特塞奥隆公司 | Device for measuring the static and/or dynamic friction coefficient of a surface |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490159A (en) * | 2018-01-29 | 2018-09-04 | 北京建工四建工程建设有限公司 | Newly mix cement-based material pump-conveying property test device and its test method |
| CN109932312A (en) * | 2018-07-19 | 2019-06-25 | 中国石油大学(华东) | Pipeline cleaner seal rubber disk testing device for friction coefficient and test method |
| CN109507106A (en) * | 2018-11-19 | 2019-03-22 | 东北大学 | Snowfield friction coefficient measuring apparatus and measurement method |
| CN112557297A (en) * | 2020-12-11 | 2021-03-26 | 河北省产品质量监督检验研究院 | Method for measuring sliding friction coefficient between two materials |
| CN113418860A (en) * | 2021-06-08 | 2021-09-21 | 法士特伊顿(西安)动力传动系统有限责任公司 | Mechanism for measuring friction force/friction coefficient and measuring method thereof |
| CN113418860B (en) * | 2021-06-08 | 2023-08-25 | 法士特伊顿(西安)动力传动系统有限责任公司 | Mechanism for measuring friction force/friction coefficient and measuring method thereof |
| CN114544484A (en) * | 2022-04-26 | 2022-05-27 | 国机传感科技有限公司 | Test device and method for measuring static friction coefficient of tire |
| CN114778364A (en) * | 2022-06-20 | 2022-07-22 | 江苏悦展新型材料有限公司 | Special-shaped refractory brick wear resistance detection device |
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|---|---|
| CN107505259B (en) | 2019-11-01 |
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