CN206804499U - A kind of device for determining surface friction coefficient - Google Patents

A kind of device for determining surface friction coefficient Download PDF

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Publication number
CN206804499U
CN206804499U CN201720326387.9U CN201720326387U CN206804499U CN 206804499 U CN206804499 U CN 206804499U CN 201720326387 U CN201720326387 U CN 201720326387U CN 206804499 U CN206804499 U CN 206804499U
Authority
CN
China
Prior art keywords
friction coefficient
elastomer block
pulley
surface friction
steel plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201720326387.9U
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Chinese (zh)
Inventor
郭雷
仇玉良
关羽
汤卓群
斗彦迪
李祖仲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Africa International Construction Engineering Co Ltd
Changan University
Original Assignee
China Africa International Construction Engineering Co Ltd
Changan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Africa International Construction Engineering Co Ltd, Changan University filed Critical China Africa International Construction Engineering Co Ltd
Priority to CN201720326387.9U priority Critical patent/CN206804499U/en
Application granted granted Critical
Publication of CN206804499U publication Critical patent/CN206804499U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of device for determining surface friction coefficient, including electronic laser record screen, support base, rut plate, elastomer block, balancing weight, Laser emission instrument and pulley;Support base height adjustable;Rut plate and pulley are on support base, and elastomer block is on rut plate;One end of connection stay cord in elastomer block, the other end of drawstring are connected by pulley with balancing weight, and the drawstring between pulley and elastomer block is horizontally oriented;Laser emission instrument is located at elastomer block upper surface center.The utility model uses laser, and electronic display is able to record the position of laser dotting, twice the distance between laser dotting, reaches accurate measure road surface acceleration with this, so as to calculate surface friction coefficient indirectly;The present apparatus can go out coefficient of friction with most fast velocity determination, and simple to operate, and accuracy is high.

Description

A kind of device for determining surface friction coefficient
Technical field
The utility model belongs to highway engineering field of traffic safety, and in particular to a kind of dress for determining surface friction coefficient Put.
Background technology
In highway engineering in China communication, it is a key factor for causing traffic accident that pavement behavior, which degenerates,. It is principal element that surface friction coefficient, which changes, in these factors, and it has not only had a strong impact on the quality on road surface itself, also shadow The performance on road surface has been rung, comfortable and safe huge hidden danger is brought to driving a vehicle.One side surface friction coefficient changes, car Road surface junction is being run over, gathering materials the bufferings of corner angle due to having lacked road surface, so as to exacerbate jolting for driving, make driving Comfortableness substantially reduce;On the other hand, when surface friction coefficient changes, the adhesive force of vehicle can also change, now, If driver has found emergency and takes brake hard, it will make it that braking distance is elongated and be more than safe distance, to driving The operation of member brings great difficulty, can even be caused a traffic accident when serious.Therefore we should be able to quickly and easily determine road surface Coefficient of friction, particularly when surface friction coefficient changes, so that we can take effective maintenance processing mode.
At present surface friction coefficient measure it is more using pendulum friction coefficient determinator, dynamic friction coefficient analyzer and Brake type surface friction coefficient detection device.Pendulum friction coefficient determinator is mainly equipped with block rubber in portable pendulum tester bottom, allows Pendulum is fallen from certain height, and because block rubber and road surface have certain frictional resistance consumed energy, pendulum can only be returned to than original Carry out low height, so as to calculate surface friction coefficient, but the method can only reflect the coefficient of friction on road surface when speed is relatively low, and Can only surface friction coefficient under single point assay certain speed.Dynamic friction coefficient analyzer is transported with a constant load and certain speed Capable tire and road surface contact, measure frictional force so as to calculate surface friction coefficient, control of this method to travel speed It is required that it is stricter, it should not implement during measure.Brake type surface friction coefficient detection device, mainly utilizes road surface Frictional force provides vehicle braking force and thrust, the size equipped with force snesor measure frictional force on wheel, so as to evaluating road The coefficient of friction in face, but this method can only determine the frictional force of direction of traffic, and road surface friction force mainly has longitudinal friction Power and side-friction composition, therefore this mode can not accurately reflect the coefficient of friction on road surface very much.
The content of the invention
For defect present in prior art, the purpose of this utility model, which is to provide one kind, quickly and easily to be determined The device of surface friction coefficient, change for pavement of road coefficient of friction, the surface friction coefficient for solving measure can not be accurate The problem of reflecting actual pavement friction.
In order to solve the above-mentioned technical problem, the utility model, which adopts the following technical scheme that, is achieved:
A kind of device for determining surface friction coefficient, including electronic laser record screen, support base, rut plate, elastomer block, match somebody with somebody Pouring weight, Laser emission instrument and pulley;
Described support base height adjustable;On support base, described elastomer block is located at for described rut plate and pulley On rut plate;One end of connection stay cord in described elastomer block, the other end of described drawstring are connected by pulley with balancing weight, Drawstring between described pulley and elastomer block is horizontally oriented;Described Laser emission instrument is located at elastomer block upper surface center Position.
The utility model also has following distinguishing feature:
Described support base includes the first steel plate and supports the support bar of the first steel plate, and described support bar is screw rod, spiral shell Bar is provided with nut.
Described support bar is at the corner location of the first steel plate.
The first described steel plate is provided with the second steel plate, and the second described steel plate is vertical with the first steel plate.
Pulley bracket is provided between described pulley and support base, described pulley bracket is arranged on the second steel plate.
Described pulley bracket is made up of first paragraph and second segment, and first paragraph is parallel with the second steel plate, second segment and first Section is in 45 ° of angles, is inclined to the outside of the first steel plate.
Described drawstring is inelastic rope.
Described elastomer block is provided with draw ring with drawstring junction, and draw ring also is provided with the other direction of described elastomer block, Two draw rings are in same level.
Described draw ring is located at the center of elastomer block side.
Described elastomer block is provided with snap ring, and described snap ring is U-shaped, the U-shaped opening insertion cushion interposition of snap ring Put, described Laser emission instrument is on snap ring.
Compared with prior art, the beneficial effects of the utility model are:
(1) the utility model uses laser, and electronic display is able to record the position of laser dotting, twice laser dotting it Between distance, accurate measure road surface acceleration is reached with this, so as to calculate surface friction coefficient indirectly;
(2) by adjusting the angle of inclination of road deck, to reach the purpose of simulated roadway road gradient actual conditions.Work as road When face coefficient of friction changes, the present apparatus can go out coefficient of friction with most fast velocity determination, and simple to operate, accuracy It is high.
Brief description of the drawings
Fig. 1 is overall structure figure of the present utility model.
Fig. 2 is pulley support figure of the present utility model.
Fig. 3 is elastic block structure schematic diagram.
Each label is expressed as in figure:1- electronic lasers record screen, 2- support bases, 3- rut plates, 4- elastomer blocks, 5- counterweights Block, 6- Laser emission instrument, 7- pulleys, 8- drawstrings, the steel plates of 9- second, 10- pulley brackets, 11- draw rings, 12- snap rings;
(2-1)-the first steel plate, (2-2)-support bar.
Explanation is further explained in detail to particular content of the present utility model below in conjunction with the drawings and specific embodiments.
Embodiment
Support base of the present utility model includes the first steel plate and supports the support bar of the first steel plate, and support bar is screw rod, spiral shell Bar is provided with nut, by rotating nuts, the height of the first steel plate is can adjust, with the actual feelings of this simulated roadway road gradient Condition.
The second steel plate of the present utility model being provided with the first steel plate edge perpendicular to the first steel plate, plays fixed experiment The purpose of rut plate used.
Drawstring between pulley of the present utility model and elastomer block is horizontally oriented, and ensures the block rubber of measure frictional force Run in the horizontal direction, ensure the precision of measure.
The utility model measure drawstring 8 used is nonelastic rope, ensures that rope does not have oneself in motion with this Acceleration.
Pulley bracket of the present utility model is made up of first paragraph and second segment, and first paragraph is parallel with the second steel plate 9, second segment It is in 45 ° of angles with first paragraph, generation friction is contacted between anti-limited slip wheel and rut plate.
Elastomer block of the present utility model is rubber, and rubber accounts for 50% in rubber, and carbon black accounts for 25%, steel wire 15%, sulphur oxidation Zinc and sulphur auxiliary agent account for 10%, simulate the main component of tire.
Laser emission instrument 6 is timing emitter, as launches a laser at interval of 0.04s.Electronic laser record screen 1 The position of laser dotting is able to record, twice the distance between laser dotting.
Principle of the present utility model:Elastomer block with Laser emission instrument is in balancing weight gravity and the common work of self friction power Under, it will do uniformly accelrated rectilinear motion, acceleration is designated as a, and the time interval that timing Laser emission instrument 6 launches laser is identical , be designated as T (0.04s herein), the position that each laser beats can be recorded by electronic laser record screen 1, twice laser spots it Between distance, take intermediate distance to change more uniform section and be designated as S1、S2、S3、S4、S5、S6.It can be calculated by physics principle Go out acceleration a, surface friction coefficient can be calculated by acceleration a, calculation procedure and formula are:
M1g-uM2G=(M1+M2)a
Wherein:
Thus can calculate:
In formula:M1The quality of-counterweight;
M2The gross mass of-rubber Laser emission instrument blob of viscose and transmitter neck;
U- needs the surface friction coefficient determined;
Test process of the present utility model:
Test the preparatory stage:Need first to check support base i.e. the first steel plate 2-1 levelness during test, pass through circle air level Or other means detection levels;The abrasion condition of elastomer block 4 is checked, ensures that elastomer block can simulate tire and be run on road surface Situation;Check whether electronic laser record screen 1 and timing Laser emission instrument 6 are working properly;The elastic situation of drawstring 8 is checked, Ensure that rope is nonelastic, the problem of preventing due to counterweight caused by rope elasticity and inconsistent block rubber acceleration;Check pulley Height, ensure that the drawstring between pulley and elastomer block is horizontally oriented, prevent horizontal direction rope from being caused with pulley friction Energy loss problem.
Test phase:Rut plate 3 is placed on above the first steel plate 2-1, ensures the level of the first steel plate 2-1 and rut plate 3, Elastomer block 4 equipped with timing Laser emission instrument 6 is placed on the left end of rut plate 3, and drawstring 8 is fastened at draw ring 11 thereon, is examined Whether horizontal look into drawstring, if unhorizontal readjust until horizontal, rope lower section hangs up balancing weight (the i.e. weight of certain mass Code), start timing Laser emission instrument, unclamp elastomer block, recall electronic laser record screen protection and deposit, under same case in triplicate.
Finally, electronic laser record screen record is recalled, six sections of length even variation in record are chosen, using in principle The formula mentioned calculates the coefficient of friction u on road surface.
Specific embodiment of the utility model given below is, it is necessary to which explanation is that the utility model is not limited to following tool Body embodiment, all equivalents done on the basis of technical scheme each fall within the scope of protection of the utility model.
Embodiment 1
A kind of device for determining surface friction coefficient, including electronic laser record screen 1, support base 2, rut plate 3, elastomer block 4th, balancing weight 5, Laser emission instrument 6 and pulley 7;
The height adjustable of support base 2;Rut plate 3 and pulley 7 are on support base 2, and elastomer block 4 is on rut plate 3;Elasticity One end of connection stay cord 8 on block 4, the other end of drawstring 8 is connected by pulley 7 with balancing weight 5, between pulley 7 and elastomer block 4 Drawstring 8 is horizontally oriented, a diameter of 20mm of pulley;Laser emission instrument 6 is located at the upper surface center of elastomer block 4.Drawstring 8 For inelastic rope.
It is screw rod that support base 2, which includes the first steel plate 2-1 and supports the support bar 2-2 of the first steel plate, support bar 2-2, screw rod It is provided with nut.Support bar 2-2 is at the first steel plate 2-1 corner location.
Another technical scheme is distinguished as with embodiment 1:First steel plate 2-1 is provided with the second steel plate 9, the second steel plate 9 It is vertical with the first steel plate 2-1;The height of second steel plate 9 is rut plate mid-height.
Another technical scheme is distinguished as with embodiment 1:Pulley bracket 10, pulley are provided between pulley 7 and support base 2 Support 10 is arranged on the second steel plate 9.Pulley bracket 10 is made up of first paragraph and second segment, and first paragraph is parallel with the second steel plate 9, Second segment and first paragraph are in 45 ° of angles, are inclined to the first steel plate 2-1 outside;The height of first paragraph is the half of rut plate height.
Another technical scheme is distinguished as with embodiment 1:Elastomer block 4 is provided with draw ring 11, elastomer block with the junction of drawstring 8 Draw ring 11 also is provided with 4 other direction, two draw rings are in same level;Draw ring 11 is located at the center of the side of elastomer block 4 Position.
Another technical scheme is distinguished as with embodiment 1:Elastomer block 4 is provided with snap ring 12, and snap ring 12 is U-shaped, snap ring 12 U-shaped opening insertion cushion 4 centre position, Laser emission instrument 6 is on snap ring 12.

Claims (10)

  1. A kind of 1. device for determining surface friction coefficient, it is characterised in that:Including electronic laser record screen (1), support base (2), Rut plate (3), elastomer block (4), balancing weight (5), Laser emission instrument (6) and pulley (7);
    Described support base (2) height adjustable;Described rut plate (3) and pulley (7) are on support base (2), described bullet Property block (4) on the rut plate (3);One end of connection stay cord (8) in described elastomer block (4), described drawstring (8) it is another End is connected by pulley (7) with balancing weight (5), and the drawstring (8) between described pulley (7) and elastomer block (4) is in level side To;Described Laser emission instrument (6) is located at elastomer block (4) upper surface center.
  2. 2. the device of measure surface friction coefficient as claimed in claim 1, it is characterised in that:Described support base (2) includes First steel plate (2-1) and the support bar (2-2) for supporting the first steel plate, described support bar (2-2) is screw rod, and screw rod is provided with spiral shell It is female.
  3. 3. the device of measure surface friction coefficient as claimed in claim 2, it is characterised in that:Described support bar (2-2) is set At the first steel plate (2-1) corner location.
  4. 4. the device of measure surface friction coefficient as claimed in claim 2, it is characterised in that:Described the first steel plate (2-1) The second steel plate (9) is provided with, described the second steel plate (9) is vertical with the first steel plate (2-1).
  5. 5. the device of measure surface friction coefficient as claimed in claim 1, it is characterised in that:Described pulley (7) and support Pulley bracket (10) is provided between seat (2), described pulley bracket (10) is arranged on the second steel plate (9).
  6. 6. the device of measure surface friction coefficient as claimed in claim 5, it is characterised in that:Described pulley bracket (10) by First paragraph and second segment are formed, and first paragraph is parallel with the second steel plate (9), and second segment and first paragraph are in 45 ° of angles, are inclined to the first steel The outside of plate (2-1).
  7. 7. the device of measure surface friction coefficient as claimed in claim 1, it is characterised in that:Described drawstring (8) is without bullet The rope of property.
  8. 8. the device of measure surface friction coefficient as claimed in claim 1, it is characterised in that:Described elastomer block (4) is with drawing Rope (8) junction is provided with draw ring (11), also is provided with draw ring (11) on the other direction of described elastomer block (4), at two draw rings In same level.
  9. 9. the device of measure surface friction coefficient as claimed in claim 8, it is characterised in that:Described draw ring (11) is located at bullet The center of property block (4) side.
  10. 10. the device of measure surface friction coefficient as claimed in claim 1, it is characterised in that:Set in described elastomer block (4) There is snap ring (12), described snap ring (12) is U-shaped, U-shaped opening insertion elastomer block (4) centre position of snap ring (12), described Laser emission instrument (6) is on snap ring (12).
CN201720326387.9U 2017-03-30 2017-03-30 A kind of device for determining surface friction coefficient Expired - Fee Related CN206804499U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720326387.9U CN206804499U (en) 2017-03-30 2017-03-30 A kind of device for determining surface friction coefficient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720326387.9U CN206804499U (en) 2017-03-30 2017-03-30 A kind of device for determining surface friction coefficient

Publications (1)

Publication Number Publication Date
CN206804499U true CN206804499U (en) 2017-12-26

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ID=60731329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720326387.9U Expired - Fee Related CN206804499U (en) 2017-03-30 2017-03-30 A kind of device for determining surface friction coefficient

Country Status (1)

Country Link
CN (1) CN206804499U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030345A (en) * 2018-07-13 2018-12-18 中国葛洲坝集团国际工程有限公司 A kind of face-plate of rockfill dam base surface restraint stress detection method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109030345A (en) * 2018-07-13 2018-12-18 中国葛洲坝集团国际工程有限公司 A kind of face-plate of rockfill dam base surface restraint stress detection method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20171226

Termination date: 20210330

CF01 Termination of patent right due to non-payment of annual fee