CN108037070A - A kind of dynamic coefficient of sliding friction measuring system and method - Google Patents

A kind of dynamic coefficient of sliding friction measuring system and method Download PDF

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Publication number
CN108037070A
CN108037070A CN201711309958.9A CN201711309958A CN108037070A CN 108037070 A CN108037070 A CN 108037070A CN 201711309958 A CN201711309958 A CN 201711309958A CN 108037070 A CN108037070 A CN 108037070A
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friction
sliding
sensor
coefficient
msub
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马彬
陈勇
林幕义
王新果
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Beijing Information Science and Technology University
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Beijing Information Science and Technology University
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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 present invention provides a kind of dynamic coefficient of sliding friction measuring system and method, wherein system includes parameter loading system, the power supply unit being connected with the input terminal of parameter loading system, the sensor signal system being connected with parameter loading system output terminal reads system, the data handling system being connected with sensor signal reading system 3.The present invention solves existing slip friction factor measurement system and method, and there are the technical problem such as experiment condition is harsh, the coefficient of determination is few, sliding velocity loading range is narrow.With changing rule of the coefficient of sliding friction with load, sliding velocity, rough road, rubber property and temperature can be tested, the advantages of realizing the continuous loading of vertical load, sliding velocity and temperature and keep.

Description

A kind of dynamic coefficient of sliding friction measuring system and method
Technical field
The invention belongs to frictional experiment equipment and mechanics of tire technical field of measurement and test, and in particular to a kind of dynamic sliding friction Coefficient measuring system level method.
Background technology
The dynamic coefficient of sliding friction has very strong nonlinear characteristic, has in mechanics of tire, accurate control field important Influence.For this reason, the dynamic coefficient of sliding friction is obtained with the non-linear of load, sliding velocity, rough surface, rubber property and temperature Changing rule is of great significance.At present, the measuring friction coefficient for carrying out sliding velocity loading using vertical disc fills Put, but measurement rubber piece volume and disk radius of curvature are small, and measurement accuracy is poor, and link characteristics effectively can not be sentenced It is fixed.Rubber test piece size can be improved using the coefficient of sliding friction measuring device of horizontal slide rail, characterize the influence of road surface characteristic, But loading range is limited by equipment quality, had a great influence by road roughness, precision is relatively low, it is impossible to which temperature is characterized.It is logical Cross identification algorithm can road pavement friction coefficient recognized, but recognized when being related to sliding velocity, vertical load and temperature parameter Spend relatively low.It can be seen from the above that there are experiment condition is harsh, the coefficient of determination is few, sliding is fast for existing slip friction factor measurement device Spend the defects of loading range is narrow.Therefore, how continuous, wide range is carried out to load, temperature and sliding velocity at the same time accurately to load It is the key issue that current coefficient of sliding friction detection device needs to solve.
The content of the invention
To solve existing slip friction factor measurement system and method, there are experiment condition is harsh, the coefficient of determination is few, sliding The technical problems such as speed loading range is narrow, the present invention provide a kind of dynamic coefficient of sliding friction measuring system and method.
A kind of dynamic coefficient of sliding friction measuring system, the system comprises parameter loading system, with parameter loading system Input terminal connection power supply unit, be connected with parameter loading system output terminal sensor signal reading system, with sensor The data handling system of signal-obtaining system connection；The power supply unit is used to provide DC power supply for measuring system；The ginseng Number loading system is made of vertical load loading and dynamometric system and sliding velocity and temperature control system；Wherein vertical load adds Carry and dynamometric system and sliding speed and temperature loading system are respectively used to realize vertical stress, sliding velocity, Contact Temperature Loading and holding；The sensor signal reads system, completes real-time display and the transmission of system all the sensors signal；It is described Data handling system, completes the data acquisition and processing (DAP) of whole system.
Preferably, above-mentioned signal-obtaining system includes force snesor, temperature sensor and velocity sensor, is respectively used to reality Power in existing measuring system, the extraction of temperature and speed signal.
Preferably, the coefficient of sliding friction that said system is adapted to is：
In formula：c0、c1、c2、c3It is friction coefficient characteristics parameter, it is related to road surface and rubber property.rvRepresent speed Relevant parameters, rpRepresent load relevant parameters, VsRepresent sliding velocity, P represents lateral pressure.
Preferably, above-mentioned vertical test system includes system frame, and the system frame is by rack leg and is arranged at stent Stent cover composition on leg；Friction dial and vertical load loading and dynamometric system, the friction are provided with the stent cover Turntable is disposed with the gear disk being threadedly coupled with friction dial from top to bottom through stent cover, is connected with gear disk Retarder, and the motor being connected with retarder.
Preferably, above-mentioned vertical load loading and dynamometric system include ball-screw, the sensing being arranged on ball-screw Device stent, the slide being arranged on sensor stand, the sliding block being arranged on slide；It is arranged between sensor stand and sliding block Vertical load dynamometer；One end is installed on sensor stand, and the horizontal force that the other end is connected with rubber test piece connecting rod is surveyed Power meter；By way of ball connection on the outside of connection sliding block, other end connection rubber test piece fixes dress for rubber test piece connecting rod one end Put；Vertical load dynamometer upper end is connected with sensor stand, the upper end connection of lower end and sliding block；Horizontal force dynamometer left end with Sensor stand connects, and right end is connected with rubber test piece connecting rod.
Preferably, above-mentioned sliding velocity and temperature control system include motor, the retarder and retarder engaged with motor Meshed gears disk, the friction dial engaged with gear disk；Temperature sensor is installed, on gear disk on friction dial Electromagnetic induction sensor is installed, resistive heater is installed on friction dial, and the conduction being connected with resistive heater is sliding Ring；The system also includes the electric machine controller being connected with motor.
Preferably, above-mentioned signal-obtaining system includes speed probe, temperature sensor, is passed with speed probe and temperature The signal conversion module of sensor connection；Further include, load measuring cell and dynamometer, with load measuring cell and dynamometer The multiple signals amplifier of connection；Further include, the numerical value being connected with signal conversion module and multiple signals amplifier out is real When display；And the RS232 interface being connected with multiple signals amplifier out；The number being connected with RS232 interface output terminal According to processing system.
Preferably, above-mentioned data handling system includes serial port data acquisition card, data collector, RS232 connectors, SD card And host computer；The serial port data acquisition card is by gathering sensor signal, by sensor signal by RS232 connectors by number According to passing to host computer；Meanwhile the data of data acquisition equipment can also be stored by SD card, and in upper computer software into Row data analysis；In host computer, experimental data average is obtained by changing corresponding operating mode.
Preferably, above-mentioned measuring method comprises the following steps：
Step 1, the rubber test piece prepared is installed on test specimen mounting rod, it is high to adjust rubber sliding block by ball-screw Degree, makes rubber block be contacted with the disk that trackslips；Return to zero vertical load dynamometer and horizontal dynamometer；
Step 2, motor is loaded by electric machine controller, until motor speed reaches pre-provisioning request；Load vertical Load, when reaching predetermined load, progress vertical deviation is fixed；
Step 3, the value of vertical load dynamometer and horizontal dynamometer is read；Obtain under this kind of rubber, rough road characteristic The dynamic coefficient of sliding friction with the rotating speed, the changing rule of vertical load；Meet to shut down after experimental data requirement, it is pending Next group of experiment；
Step 4, the preparation of different rough roads is completed by dismantling disk, change rubber test piece realizes the table of rubber property Sign；When considering temperature parameter, friction disc is preheated by resistance wire before the experiments were performed；When temperature reaches designated value Afterwards, tested by step 1；
Step 5, in the above process, gained measurement data is subjected to classified finishing, obtains friction coefficient fitting result.
Preferably, friction coefficient fitting result is that data are handled using MATLAB programmings in above-mentioned steps 5, is massaged Wipe coefficient formula form and be fitted acquisition.
It is using the beneficial effect of above technical scheme：
1st, the system can test the coefficient of sliding friction with load, sliding velocity, rough road, rubber property and temperature Changing rule, realizes the continuous loading of vertical load, sliding velocity and temperature and keeps.
2nd, loading range is wide, measurement parameter is comprehensive, small, disclosure satisfy that the function of coefficient of sliding friction full working scope test It is required that and cost-effectiveness requirement.
Brief description of the drawings
Fig. 1 is test principle figure in the present invention；
Fig. 2 is test system structure schematic diagram in the present invention；
Fig. 3 is vertical load loading and horizontal force measuring unit in the present invention；
Fig. 4 is that resistive heater arranges design sketch in the present invention；
Fig. 5 is sliding velocity and temperature control system schematic diagram in the present invention；
Fig. 6 is that sensor signal reads systematic schematic diagram in the present invention；
Fig. 7 is system data processing unit schematic diagram in the present invention.
Brief description of the drawings：
Data load system 1, vertical test system 101, vertical load loading and dynamometric system 111, ball-screw 1111, Sensor stand 1112, slide 1113, sliding block 11131, vertical load dynamometer 1114, horizontal force dynamometer 1115, rubber examination Part connecting rod 1116, rubber test piece fixing device 1117, sliding velocity and temperature control system 102, motor 112, retarder 122, gear disk 132, friction dial 142, temperature sensor 152, electromagnetic induction sensor 162, resistive heater 172, leads Electric slip ring 182, electric machine controller 192；System frame 131, rack leg 1311, stent cover 1312, friction dial 121, gear circle Disk 161, retarder 141, motor 151；
Power supply unit 2；
Signal-obtaining system 3, speed probe 301, temperature sensor 302, signal conversion module 305, load measurement pass Sensor 303, dynamometer 304, multiple signals amplifier 306, numerical value real-time display device 307, RS232 interface 308；
Data handling system 4, serial port data acquisition card 401, data collector 402, RS232 connectors 403, SD card 404 With host computer 405.
Embodiment
Below against attached drawing, by the description of the embodiment, making to embodiment of the invention further details of Explanation, it is therefore an objective to help those skilled in the art to have more complete, accurate and deep reason to design of the invention, technical solution Solution, and contribute to its implementation.
Shown in Figure 1, dynamic coefficient of sliding friction measuring system provided by the invention includes parameter loading system 1, with The power supply unit 2 of the input terminal connection of parameter loading system 1, the sensor signal system being connected with 1 output terminal of parameter loading system System reading system 3, the data handling system 4 being connected with sensor signal system reading system 3；Parameter loading system 1 is by vertical Load loading and dynamometric system 101 and sliding velocity and temperature control system 102 form；It is measuring system that power supply unit 2, which is used for, DC power supply is provided；Parameter loading system 1, completes the parameter loading of whole system and keeps, wherein vertical load loading and survey Force system 101 and sliding speed and temperature loading system 102 are respectively used to realize vertical stress, sliding velocity, Contact Temperature Loading and holding.Sensor signal system, which reads system 3, includes force snesor, temperature sensor and velocity sensor, uses respectively In realizing power in measuring system, the extraction of temperature and speed signal.The present invention can realize the continuous loading of measurement parameter, can Different temperatures work is carried out with the non-linear relation of load, sliding velocity, rough road, rubber property to the dynamic coefficient of sliding friction Accurate measurement under condition.The coefficient of sliding friction that this system is adapted to is
In formula：c0、c1、c2、c3It is friction coefficient characteristics parameter, it is related to road surface and rubber property.rvRepresent speed Relevant parameters, rpRepresent load relevant parameters, VsRepresent sliding velocity, P represents lateral pressure.The coefficient of sliding friction is surveyed It is main to measure sliding velocity V during amounts, lateral pressure P, four parameters of roadway characteristic and rubber property, pass through be fitted obtain c0、 c1、c2、c3, rv, rp.Wherein, power supply unit provides DC power supply for system；Vertical load loads and device for measuring force, sliding speed And temperature loading system realizes the loading and holding of vertical stress, sliding velocity, Contact Temperature；Sensing system reading unit is real The signal extraction of existing force snesor, temperature sensor and velocity sensor；System data processing unit completes the number of whole system According to collection and processing.
Test system specific implementation provided by the invention is as follows：
Step 1, the rubber test piece prepared is installed on test specimen mounting rod, it is high to adjust rubber sliding block by ball-screw Degree, makes rubber block be contacted with the disk that trackslips；Return to zero vertical load dynamometer and horizontal dynamometer；
Step 2, motor is loaded by electric machine controller, until motor speed reaches pre-provisioning request；Load vertical Load, when reaching predetermined load, progress vertical deviation is fixed；
Step 3, the value of vertical load dynamometer and horizontal dynamometer is read；Obtain under this kind of rubber, rough road characteristic The dynamic coefficient of sliding friction with the rotating speed, the changing rule of vertical load；Meet to shut down after experimental data requirement, it is pending Next group of experiment；
Step 4, the preparation of different rough roads is completed by dismantling disk, change rubber test piece realizes the table of rubber property Sign；When considering temperature parameter, friction disc is preheated by resistance wire before the experiments were performed；When temperature reaches designated value Afterwards, tested by step 1；
Step 5, in the above process, gained measurement data is subjected to classified finishing, data are carried out using MATLAB programmings Processing, is fitted by friction coefficient formula form, obtains friction coefficient fitting result.
The dynamic coefficient of sliding friction provided by the invention tests system, can realize load, sliding velocity, temperature it is continuous Loading, while can accurately measure the influence of rubber, rough road to the coefficient of sliding friction.The present invention has small, test Parameter is extensive, and load loading range is 0-1KN, sliding velocity loading range is 0-5m/s, meets the function and economy of test It is required that.System design parameter is as follows
1 device parameter list of table
Referring to shown in Fig. 2-Fig. 3：
Vertical test system 101 includes system frame 131, and system frame 131 is by rack leg 1311 and is arranged at rack leg Stent cover 1312 on 1311 forms；Friction dial 121 and vertical load loading and dynamometric system are provided with stent cover 1312 111, friction dial 121 is disposed with the gear circle being threadedly coupled with friction dial 121 through stent cover 1321 from top to bottom Disk 161, the retarder 141 being connected with gear disk 161, and the motor 151 being connected with retarder 141.Vertical load loads And dynamometric system 111 includes ball-screw 1111, the sensor stand 1112 being arranged on ball-screw 1111, is arranged at slide Sliding block 11131 on 1113；The vertical load dynamometer 1114 being arranged between sensor stand 1112 and sliding block 11131；Hang down It is connected to 1114 upper end of load dynamometer with sensor stand 1112, lower end is connected with the upper end of sliding block 11131；One end is installed on On sensor stand 1112, horizontal force dynamometer 1115 that the other end is connected with rubber test piece connecting rod 1116；Rubber test piece 1116 one end of connecting rod outside of connection sliding block 11131 by way of ball connection, other end connection rubber test piece fixing device 1117；Wherein, the Plumb load of load is realized by ball-screw 1111, locking device can carry out locking to loading, ensure to survey Load loading during examination.Sensor stand 1112 is connected with ball-screw 1111.1114 upper end of vertical load dynamometer with Sensor stand 1112 connects, and lower end is connected with the upper end of sliding block 11131.Slide 1113 is connected with sensor stand 1112.It is sliding The use of rail can ensure fixed X, Y direction, only measure the power of Z-direction, ensure vertical force measurement accuracy.Horizontal force dynamometer Stent is fixed in one end, and the other end is connected with rubber test piece connecting rod, and horizontal slide that rubber test piece is obtained by changing is rubbed Wipe power.This device can make the vertical active force of force sensor measuring all the time, remove adjustment from the smaller angular range in vertical surface Device.Rubber test piece connecting rod allows certain vertical angle, angle need to only be measured, vertical effect can be calculated Power P and force of sliding friction actual value u.
Referring to shown in Fig. 4-Fig. 5, sliding velocity and temperature control system 102 include motor 112, are engaged with motor 112 Retarder 122 and 122 meshed gears disk 132 of retarder, the friction dial 142 engaged with gear disk 132；Friction turns Temperature sensor 152 is installed on disk 142, electromagnetic induction sensor 162 is installed on gear disk 132, on friction dial 142 Resistive heater 172, and the conducting slip ring 182 being connected with resistive heater 172 are installed；The system further includes and motor The electric machine controller 192 of 112 connections.Wherein, motor 112 is direct current generator, passes through retarder 122 and gear disk 132, friction Turntable 142 is attached.The connection of retarder 122 can improve motor output torque and reduce friction disc rotating speed.Friction dial 142 be aluminum alloy material, can be dismantled and be laid with corresponding road surface, can ensure friction disc rotation process by plane treatment In do not produce the fluctuation of vertical load.The rotating speed for realizing turntable by electric rotating machine rotating speed control button loads.Electromagnetic induction passes Sensor 162 keeps certain distance to be installed with gear disk 132, measures the velocity of rotation of turntable in real time.Rubber block sliding speed Spending calculation formula is
Vs=2 π L ω
Wherein：L represents distance of the test specimen away from disc centre, and ω represents to rotate disk rotating speed, and numerical value is measured by speed probe Signal is drawn according to gear disk analog-to-digital conversion.To ensure that experimental system has higher stability, can be carried out in relatively low deceleration Friction coefficient compared with big load is tested, and in higher rotation speed test compared with the friction coefficient of low load.Conducting slip ring 182 and heating Resistance wire 172 connects, and resistive heater is in heating mode all the time during can ensureing disk rotational, completes the loading of temperature And holding.When being tested into trip temperature, bottom-heated is carried out to friction dial in advance, treats that temperature sensor reading reaches preset requirement When, temperature is kept.Temperature sensor 152 completes the real-time measurement of disc surfaces temperature.The pallet that trackslips can be completed not With the structure on road surface；Pass through the rubber test piece that changes the outfit, influence of the test rubber property to friction coefficient.
Shown in Figure 6, sensor signal system, which reads system 3, includes speed probe 301, temperature sensor 302, with The signal conversion module 305 that speed probe 301 and temperature sensor 302 connect；Further include, 303 He of vertical load dynamometer Horizontal force dynamometer 304, the multiple signals amplifier 306 being connected with vertical load dynamometer 303 and horizontal force dynamometer 304； Further include, the numerical value real-time display device 307 being connected with signal conversion module 305 and 306 output terminal of multiple signals amplifier；And The RS232 interface 308 being connected with 306 output terminal of multiple signals amplifier；At the data being connected with 308 output terminal of RS232 interface Reason system 4.Sensor signal system read system 3, be specially sensor signal reading unit, sensor specifically include S types draw/ Compression dynamomoter, speed probe, temperature sensor；Horizontal force dynamometer 304 is connected with multiple signals amplifier 306, is passed through The signal of signal amplifier adjustment is converted to the voltage signal of 1-5V, can carry out real-time display by measurement data display device. The output of speed probe 301 is 1-18V voltage signals, and real-time display is carried out through display device by signal conversion.Temperature sensing The output of device 302 is 4-20MA current signals, and need to be transformed to by signal, which can directly display voltage signal, carries out real-time display.This Outside, the sensor measurement signal by conversion is connected by RS232 interface with peripheral data processing system 4, for later data Processing.
It is shown in Figure 7, the present invention in data handling system 4 include serial port data acquisition card 401, data collector 402, RS232 connectors 403, SD card 404 and host computer 405；Serial port data acquisition card is believed sensor by gathering sensor signal Number host computer is passed data to by RS232 connectors；Meanwhile the data of data acquisition equipment can also be deposited by SD card Storage, and data analysis is carried out in upper computer software；In host computer, experimental data average is obtained by changing corresponding operating mode. Serial port data acquisition card 401 reads sensor signal in system 3 by gathering sensor signal system, and sensor signal is passed through RS232 connectors 403 pass data to host computer.Meanwhile the data of data collector 402 can also be deposited by SD card Storage, and data analysis is carried out in upper computer software.In host computer, experimental data average is obtained by changing corresponding operating mode. By writing MATLAB data processors, the conversion and analysis of gathered data are completed.Function is fitted with MATLAB data, is obtained Obtain coefficient of sliding friction fitting parameter c0、c1、c2、c3, rv, rp, finally obtain without the slip friction factor model under operating mode.
Specific test procedure in implementation process is as follows：When being tested, keep vertical load constant, measure certain cunning Shut down after the coefficient of sliding friction moved after speed.After rubber test piece temperature is reduced to environment temperature, restart to test.Specifically Experimental procedure it is as follows：
Step 1, the rubber test piece prepared is installed on test specimen mounting rod, it is high to adjust rubber sliding block by ball-screw Degree, makes rubber block be contacted with the disk that trackslips；Return to zero vertical load dynamometer and horizontal dynamometer；
Step 2, motor is loaded by electric machine controller, until motor speed reaches pre-provisioning request；Load vertical Load, when reaching predetermined load, progress vertical deviation is fixed；
Step 3, the value of vertical load dynamometer and horizontal dynamometer is read；Obtain under this kind of rubber, rough road characteristic The dynamic coefficient of sliding friction with the rotating speed, the changing rule of vertical load；Meet to shut down after experimental data requirement, it is pending Next group of experiment；
Step 4, the preparation of different rough roads is completed by dismantling disk, change rubber test piece realizes the table of rubber property Sign；When considering temperature parameter, friction disc is preheated by resistance wire before the experiments were performed；When temperature reaches designated value Afterwards, tested by step 1；
Step 5, in the above process, gained measurement data is subjected to classified finishing, data are carried out using MATLAB programmings Processing, is fitted by friction coefficient formula form, obtains friction coefficient fitting result.
The present invention is exemplarily described above in association with attached drawing, it is clear that the present invention implements and from above-mentioned side The limitation of formula, as long as employ the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress；Or not It is improved, the above-mentioned design of the present invention and technical solution are directly applied into other occasions, in protection scope of the present invention Within.

Claims (10)

  1. A kind of 1. dynamic coefficient of sliding friction measuring system, it is characterised in that：The system comprises parameter loading system (1), with The power supply unit (2) of the input terminal connection of parameter loading system (1), the sensor being connected with parameter loading system (1) output terminal Signal-obtaining system (3), the data handling system (4) being connected with sensor signal reading system (3)；The parameter loading system (1) it is made of vertical test system (101) and sliding velocity and temperature control system (102)；The power supply unit (2) is used for Measuring system provides DC power supply；The parameter loading system (1) completes the data acquisition and processing (DAP) of whole system, wherein vertical Test system (101) is respectively used to realize vertical stress, sliding velocity, contact with sliding speed and temperature loading system (102) The loading and holding of temperature.
  2. 2. dynamic coefficient of sliding friction measuring system according to claim 1, it is characterised in that：The sensor signal is read System (3) includes force snesor, temperature sensor and velocity sensor, is respectively used to realize power in measuring system, temperature and speed Spend the extraction of signal.
  3. 3. dynamic coefficient of sliding friction measuring system according to claim 1 or 2, it is characterised in that：The system is fitted The coefficient of sliding friction answered is：
    <mrow> <mi>u</mi> <mo>=</mo> <mrow> <mo>(</mo> <msub> <mi>c</mi> <mn>0</mn> </msub> <mo>+</mo> <msub> <mi>c</mi> <mn>1</mn> </msub> <msup> <mi>e</mi> <mrow> <msub> <mi>r</mi> <mi>v</mi> </msub> <mrow> <mo>|</mo> <msub> <mi>V</mi> <mi>s</mi> </msub> <mo>|</mo> </mrow> </mrow> </msup> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <msub> <mi>c</mi> <mn>2</mn> </msub> <mo>+</mo> <msub> <mi>c</mi> <mn>3</mn> </msub> <msup> <mi>e</mi> <mrow> <msub> <mi>r</mi> <mi>p</mi> </msub> <mrow> <mo>|</mo> <mi>P</mi> <mo>|</mo> </mrow> </mrow> </msup> <mo>)</mo> </mrow> </mrow>
    In formula：c0、c1、c2、c3It is friction coefficient characteristics parameter, it is related to road surface and rubber property.rvRepresent that speed is concerned with Parameter, rpRepresent load relevant parameters, VsRepresent sliding velocity, P represents lateral pressure.
  4. 4. dynamic coefficient of sliding friction measuring system according to claim 3, it is characterised in that：The vertical test system (101) system frame (131) is included, the system frame (131) is by rack leg (1311) and is arranged on rack leg (1311) Stent cover (1312) composition；Friction dial (121) and vertical load loading and dynamometry are provided with the stent cover (1312) System (111), the friction dial (121) are disposed with and friction dial (121) from top to bottom through stent cover (1321) The gear disk (161) of threaded connection, the retarder (141) being connected with gear disk (161), and with retarder (141) even The motor (151) connect.
  5. 5. dynamic coefficient of sliding friction measuring system according to claim 4, it is characterised in that：Vertical load loading and Dynamometric system (111) includes ball-screw (1111), and the sensor stand (1112) being arranged on ball-screw (1111), is set In the slide (1113) on sensor stand (1112), the sliding block (11131) being arranged on slide (1113)；It is arranged at sensor Vertical load dynamometer (1114) between stent (1112) and sliding block (11131)；One end is installed on sensor stand (1112 On), the horizontal force dynamometer (1115) that the other end is connected with rubber test piece connecting rod (1116)；The rubber test piece connecting rod (1116) by way of ball connection on the outside of connection sliding block (11131), the other end connects rubber test piece fixing device for one end (1117)；Vertical load dynamometer (1114) upper end is connected with sensor stand (1112), lower end and sliding block (11131) Upper end connects；Horizontal force dynamometer (1115) left end is connected with sensor stand (1112), and right end is connected with rubber test piece Bar (1116) connects.
  6. 6. dynamic coefficient of sliding friction measuring system according to claim 5, it is characterised in that：The sliding velocity and temperature Control system (102) includes motor (112), the retarder (122) engaged with motor (112), the tooth engaged with retarder (122) Take turns disk (132), the friction dial (142) engaged with gear disk (132)；Temperature is installed on the friction dial (142) Sensor (152), is provided with electromagnetic induction sensor (162) on the gear disk (132), on the friction dial (142) Resistive heater (172), and the conducting slip ring (182) being connected with resistive heater (172) are installed；The system also includes The electric machine controller (192) being connected with motor (112).
  7. 7. dynamic coefficient of sliding friction measuring system according to claim 6, it is characterised in that：The sensor signal is read System (3) includes speed probe (301), temperature sensor (302), with speed probe (301) and temperature sensor (302) The signal conversion module (305) of connection；Further include, vertical load dynamometer (303) and horizontal force dynamometer (304), it is and vertical Load dynamometer (303) and the multiple signals amplifier (306) of horizontal force dynamometer (304) connection；Further include, converted with signal The numerical value real-time display device (307) that module (305) is connected with multiple signals amplifier (306) output terminal；And and multiple signals The RS232 interface (308) of amplifier (306) output terminal connection；The data processing system being connected with RS232 interface (308) output terminal Unite (4).
  8. 8. dynamic coefficient of sliding friction measuring system according to claim 7, it is characterised in that：The data handling system (4) serial port data acquisition card (401), data collector (402), RS232 connectors (403), SD card (404) and host computer are included (405)；Sensor signal is passed through RS232 connectors by the serial port data acquisition card (401) by gathering sensor signal (403) host computer (405) is passed data to.
  9. A kind of 9. dynamic coefficient of sliding friction measuring method, it is characterised in that：The measuring method comprises the following steps：
    S1：The rubber test piece prepared is installed on test specimen mounting rod, rubber sliding block height is adjusted by ball-screw, makes rubber Blob of viscose is contacted with the disk that trackslips；Return to zero vertical load dynamometer and horizontal dynamometer；
    S2：Motor is loaded by electric machine controller, until motor speed reaches pre-provisioning request；Vertical load is loaded, when Vertical deviation is carried out when reaching predetermined load to fix；
    S3：Read the value of vertical load dynamometer and horizontal dynamometer；The dynamic obtained under this kind of rubber, rough road characteristic is slided The coefficient of kinetic friction is with the rotating speed, the changing rule of vertical load；Meet to shut down after experimental data requirement, pending next group real Test；
    S4：The preparation of different rough roads is completed by dismantling disk, change rubber test piece realizes the characterization of rubber property；Consider During temperature parameter, friction disc is preheated by resistance wire before the experiments were performed；After temperature reaches designated value, lead to Step 1 is crossed to be tested；
    S5：In the above process, gained measurement data is subjected to classified finishing, obtains friction coefficient fitting result.
  10. A kind of 10. dynamic coefficient of sliding friction measuring method according to claim 9, it is characterised in that：The step S5 Middle friction coefficient fitting result is that data are handled using MATLAB programmings, is fitted and obtains by friction coefficient formula form Take.
CN201711309958.9A 2017-12-11 2017-12-11 A kind of dynamic coefficient of sliding friction measuring system and method Pending CN108037070A (en)

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CN109060648A (en) * 2018-08-28 2018-12-21 河南科技大学 A kind of spheric granules coefficient of rolling friction measurement method
CN109211775A (en) * 2018-09-10 2019-01-15 武汉轻工大学 A kind of dynamic friction coefficient measuring device
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
CN112595665A (en) * 2020-12-31 2021-04-02 华南理工大学 Device and method for measuring sliding friction coefficient between poly V-ribbed belt and belt wheel
CN112730596A (en) * 2020-12-22 2021-04-30 河南科技大学 System and method for testing surface force-heat-electricity load distribution of current-carrying friction micro-area
CN113375918A (en) * 2021-05-28 2021-09-10 西安理工大学 Device and method for measuring dynamic characteristics of sliding friction joint surface
CN114279881A (en) * 2022-01-10 2022-04-05 吉林大学 Device and method for testing frictional wear characteristics of tread rubber material at critical temperature

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CN109060648A (en) * 2018-08-28 2018-12-21 河南科技大学 A kind of spheric granules coefficient of rolling friction measurement method
CN109060648B (en) * 2018-08-28 2021-02-05 河南科技大学 Method for measuring rolling friction coefficient of spherical particles
CN109211775A (en) * 2018-09-10 2019-01-15 武汉轻工大学 A kind of dynamic friction coefficient measuring device
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
CN112730596A (en) * 2020-12-22 2021-04-30 河南科技大学 System and method for testing surface force-heat-electricity load distribution of current-carrying friction micro-area
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CN112595665A (en) * 2020-12-31 2021-04-02 华南理工大学 Device and method for measuring sliding friction coefficient between poly V-ribbed belt and belt wheel
CN113375918A (en) * 2021-05-28 2021-09-10 西安理工大学 Device and method for measuring dynamic characteristics of sliding friction joint surface
CN113375918B (en) * 2021-05-28 2023-11-03 西安理工大学 Sliding friction joint surface dynamic characteristic measuring device and measuring method
CN114279881A (en) * 2022-01-10 2022-04-05 吉林大学 Device and method for testing frictional wear characteristics of tread rubber material at critical temperature

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Application publication date: 20180515