CN110031395A - Cornering ratio test macro and method, water injector, road table water film thickness control method - Google Patents
Cornering ratio test macro and method, water injector, road table water film thickness control method Download PDFInfo
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- CN110031395A CN110031395A CN201910333672.7A CN201910333672A CN110031395A CN 110031395 A CN110031395 A CN 110031395A CN 201910333672 A CN201910333672 A CN 201910333672A CN 110031395 A CN110031395 A CN 110031395A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
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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 cornering ratio test macro and method, water injector, road table water film thickness control methods.The road table water film thickness control method of above-mentioned cornering ratio test, comprising the following steps: the construction depth TD on detection test road surface；Water injector is measured into the water bandwidth b that the water of the water injector sprinkling leaves on the test road surface in described test road traveling a distance according to the amount of water sprayed and pre-set velocity of 5 ± 0.5L/s；Amount of water sprayed Q needed for reaching preset water film thickness according to formula calculating；It uses the water injector to travel with the pre-set velocity and spray water according to the amount of water sprayed Q, obtains the moisture film of preset thickness.The road table water film thickness control method of cornering ratio test of the present invention can control water film thickness and amount of water sprayed according to pavement structure, reduce or even eliminate the influence that water film thickness generates cornering ratio SFC test value.
Description
Technical field
The present invention relates to road surface the field of test technology, and in particular to cornering ratio test macro and method, water injector,
Road table water film thickness control method.
Background technique
Measurement for sideway force coefficient SFC value, the cornering ratio test macro introduced in China's standards system
It is the SCRIM system of Britain, while the supplement as large scale equipment in practical applications, China is also by Mu-meter coefficient of friction
Test macro and test method bring specification into, and in recent years using also more universal.Either SCRIM system is still
Mu-meter system requires during the test carries out artificial watering in front of testing wheel, keeps road table wet, to simulate rain
Its worst driving states, while in order to ensure test condition is relatively stable, when test, mention the thickness of road table moisture film
Certain requirement is gone out.In actual application, by a large amount of contrastive test, it has been found that amount of water sprayed in front of testing wheel
Size can have a certain impact to the cornering ratio SFC value measured, be usually expressed as the bigger cornering ratio SFC of amount of water sprayed and survey
Examination value is lower, and the smaller cornering ratio SFC test value of amount of water sprayed is higher.
The spray mode of lateral force test system domestic at present mainly has pressurization water spray and two class of artesian water.Wherein pressurization spray
Water is mainly sprayed onto front of testing wheel by way of pumping for water pump by water, is applied to SCRIM system more.The mode of artesian water is not
If water pump, allows water voluntarily to flow in front of testing wheel by water jet by water pressure, be applied to Mu-meter system more.But no matter
It is the mode of pressurization water spray or the mode of artesian water, the size of pressure (hydraulic) water water more random for the control of amount of water sprayed
It can be influenced by pump power, the size of artesian water water can be influenced by waterwheel height of water level, can not achieve the table moisture film that satisfies the need
Thickness is controlled, to the size of watering amount can not strict control, cannot eliminate water film thickness to cornering ratio SFC test
It is worth the influence generated.
In addition, the pavement structural depth of different types of structure is different, identical water is spread across the road surface of different configuration depth, shape
At water film thickness it is also not identical, and domestic detection unit carries out cornering ratio survey for various forms of pavement structures at present
The control of watering amount is not accomplished to treat with a certain discrimination when examination, also results in water film thickness and is unable to control.
Summary of the invention
Based on this, it is necessary to provide one kind to control water film thickness and amount of water sprayed according to pavement structure by the present invention, reduces very
The road table water film thickness control tested to cornering ratio of the elimination water film thickness to the influence that cornering ratio SFC test value generates
Method processed.
The present invention also provides a kind of cornering ratio test methods.
The present invention also provides a kind of water injectors of cornering ratio test.
The present invention also provides a kind of cornering ratio test macros.
In order to achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of road table water film thickness control method of cornering ratio test comprising following steps:
The construction depth TD on detection test road surface；
By water injector according to 5 ± 0.5L/s amount of water sprayed and pre-set velocity one section of the test road traveling away from
From measuring the water bandwidth b that the water of water injector sprinkling leaves on the test road surface；
Amount of water sprayed Q needed for reaching preset water film thickness according to following formula calculating:
Wherein, v is the travel speed of the water injector, km/h；δ is water film thickness, mm；D is detection test road surface
The nominal maximum aggregate size of amount used sand, mm when construction depth TD；B is water bandwidth, m；TD is construction depth, mm；
It uses the water injector to travel with the pre-set velocity and spray water according to the amount of water sprayed Q, obtains preset thickness
Moisture film.
In some of embodiments, the method for the construction depth TD on the detection test road surface are as follows: according to specification " highway road
Base road surface on-the-spot test regulation " T0961-1995 in (JTG E60-2008) detected.
In some of embodiments, the water bandwidth that the water of the water injector sprinkling leaves on the test road surface is measured
When b, the travel speed of the water injector need to be stablized in the pre-set velocity.
In some of embodiments, the water film thickness δ is 0.5mm, and the nominal maximum aggregate size d is 0.3mm.
The present invention also provides a kind of cornering ratio test method, the road table moisture film tested using the cornering ratio
Method for controlling thickness is controlled the water injector and is travelled with the pre-set velocity and sprayed water according to default amount of water sprayed Q, preset
Then the moisture film of thickness carries out cornering ratio test.
The present invention also provides a kind of water injectors of cornering ratio test comprising:
Water supply component；
Sprinkler part, the sprinkler part include sparge pipe and the water spout that is installed on the sparge pipe, the water spray
Pipe is connected to the water supply component；
Pressing member, the pressing member are installed on the sparge pipe；
Flow control component, the flow control component is installed on the sparge pipe and is located at the water spout to be added with described
Between splenium part.
In some of embodiments, the water spout of the sprinkler part is in fish tail shape, and the water outlet of the water spout
Mouth size is greater than water inlet size.
In some of embodiments, the water flow adjustable range of the pressing member is 1m3/h-60m3/ h, the flow control
The water flow control range of component is 0L/s-20L/s.
In some of embodiments, the water supply component includes car body and the water tank that is installed on the car body.
The present invention also provides a kind of cornering ratio test macros comprising the water spray dress of the cornering ratio test
It sets.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the water injector of the test of cornering ratio described in a preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of cornering ratio test device described in a preferred embodiment of the present invention.
Specific embodiment
It to facilitate the understanding of the present invention, below will be to invention is more fully described.But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes
It is more thorough and comprehensive to the understanding of the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Embodiment
The present invention provides a kind of road table water film thickness control method of cornering ratio test, for surveying in cornering ratio
The water film thickness on control test road surface when examination, to guarantee the accuracy of test data comprising following steps:
The construction depth TD on detection test road surface；
Water injector is surveyed according to the amount of water sprayed and pre-set velocity of 5 ± 0.5L/s in test road traveling a distance
The water bandwidth b that the water of amount water injector sprinkling leaves on test road surface；
Amount of water sprayed Q needed for reaching preset water film thickness according to following formula calculating:
Wherein, v is the travel speed of water injector, km/h；δ is water film thickness, mm；D is the construction on detection test road surface
The nominal maximum aggregate size of amount used sand, mm when depth TD；B is water bandwidth, m；TD is construction depth, mm；
The water injector is used with pre-set velocity traveling and is sprayed water according to amount of water sprayed Q, the moisture film of preset thickness is obtained.
Water film thickness therein is test specification requirement, and δ is generally 0.5mm, and the nominal maximum aggregate size d of code requirement is
0.3mm.The travel speed of water injector is set as 50km/h according to specification, uses the numerical value of the code requirement herein.
Wherein, the method for the construction depth TD on detection test road surface are as follows: " highway subgrade pavement on-the-spot test is advised according to specification
Journey " T0961-1995 in (JTG E60-2008) detected.Selected test road surface section should have representative when detection
Property, i.e. its construction depth TD should be able to represent the average texture depth TD on test road surface, control so just more precisely.If it cannot be guaranteed that
Selected test road surface section is representative when detection, then its control has deviation, but also superior to current test method pair
The accuracy of test data control.
When testing the water bandwidth b that road surface leaves, the travel speed of water injector needs the water of measurement water injector sprinkling
Stablize in pre-set velocity, measures and be averaged at three.Because since speed leads to water cross flow more slowly when car body ground zero, thus water
Water bandwidth after band is wider, and speed is stablized is more representative.
Amount of water sprayed and water film thickness can be accurately controlled using the above method, after controlling water film thickness using this method, so that it may
It is tested with road pavement.
That is, the present invention also protects a kind of cornering ratio test method, the road table tested using above-mentioned cornering ratio
Water film thickness control method controls water injector with above-mentioned pre-set velocity traveling and sprays water according to the amount of water sprayed Q being calculated,
The moisture film of preset thickness is obtained, cornering ratio test is then carried out.With original speed when driving, can release rate factor
Influence to water film thickness.
Above-mentioned test method and road table water film thickness control method can be sprayed using arbitrary water injector
Water, for example, by using following water injector.
Please refer to Fig. 1, a kind of water injector 100 of cornering ratio test comprising water supply component 10, sprinkler part
20, pressing member 30 and flow control component 40, water supply component 10 are connected to water supply component for providing water source, sprinkler part 20
10, the water in water supply component 10 is drawn, sprinkler part 20 includes sparge pipe 21 and the water spout 22 being installed on sparge pipe 21, spray
Water pipe 21 is connected to water supply component 10, and pressing member 30 is installed on sparge pipe 21, for the water in sparge pipe 21 pressurize with
It sprays, flow control component 40 is installed on sparge pipe 21 and between pressing member 30 and water spout 22, for adjusting water spray
The water flow that pipe 21 sprays, and then adjust amount of water sprayed Q.
In one embodiment, water supply component 10 includes car body 11 and the water tank 12 being installed on the car body 11.Car body 11 can be with
It walks with water tank 12 on road surface, so that sprinkler part 20 can follow movement, water is sprayed on to the different location on road surface.Water
The shape and structure of case 12 with no restrictions, can achieve storage water and the purpose being connected to sprinkler part 20.
In one embodiment, the water spout 22 of sprinkler part 20 is in fish tail shape, and the water outlet size of water spout 22 be greater than into
Mouth of a river size.Water flow can be sprayed in this way with waterfall shape, and the position of the adjustable water flow sprinkling in the direction by adjusting water spout.Spray
The quantity of water nozzle 22 be one, two or more, be mounted on a sparge pipe 21.The quantity of sprinkler part 20 is also possible to
Multiple, multiple sprinkler parts 20 pass through a flow control component by a flow control component 40 or each sprinkler part 20
40 controls.
In one embodiment, the water flow adjustable range that pressing member 30 requires is 1m3/h-60m3/ h, to be adapted to more roads
Face test.
In one embodiment, pressing member 30 is a pressure pump.
The water flow control range that flow control component 40 requires is 0L/s-20L/s, with regulating water flow as needed
Size, to achieve the purpose that accurately control unit time water yield.
In one embodiment, flow control component 40 is a constant flow rate valve, can accurately control water flow by control valve
The size of amount.Certainly, in other embodiments, flow control component 40 is also possible to other flow regulating parts, as long as energy
Enough achieve the purpose that accurately control unit time water yield.
Referring to figure 2., the present invention also protects a kind of cornering ratio test macro 200 comprising above-mentioned cross force system
The water injector 100 and test suite 101 of number test, test suite 101 are mounted on the side of water supply component 10, and close to water spray
Component 20 is arranged, and when the water spray of sprinkler part 20 is after testing road surface formation moisture film, 101 road pavement of test suite is tested.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of road table water film thickness control method of cornering ratio test, which comprises the following steps:
The construction depth TD on detection test road surface；
Water injector is surveyed according to the amount of water sprayed and pre-set velocity of 5 ± 0.5L/s in described test road traveling a distance
Measure the water bandwidth b that the water of the water injector sprinkling leaves on the test road surface；
Amount of water sprayed Q needed for reaching preset water film thickness according to following formula calculating:
Wherein, v is the travel speed of the water injector, km/h；δ is water film thickness, mm；D is the construction on detection test road surface
The nominal maximum aggregate size of amount used sand, mm when depth TD；B is water bandwidth, m；TD is construction depth, mm；
It uses the water injector to travel with the pre-set velocity and spray water according to the amount of water sprayed Q, obtains the water of preset thickness
Film.
2. the road table water film thickness control method of cornering ratio test according to claim 1, which is characterized in that detection
The method of the construction depth TD on the test road surface are as follows: according to specification " highway subgrade pavement on-the-spot test regulation " (JTG E60-
2008) T0961-1995 in is detected.
3. the road table water film thickness control method of cornering ratio test according to claim 1 or 2, which is characterized in that
When measuring the water bandwidth b that the water of water injector sprinkling leaves on the test road surface, the traveling speed of the water injector
Degree need to be stablized in the pre-set velocity.
4. a kind of cornering ratio test method, which is characterized in that use the described in any item cornering ratios of claim 1-3
The road table water film thickness control method of test, is controlled the water injector and is travelled with the pre-set velocity and according to default amount of water sprayed
Q water spray, obtains the moisture film of preset thickness, then carries out cornering ratio test.
5. a kind of water injector of cornering ratio test characterized by comprising
Water supply component；
Sprinkler part, the sprinkler part include sparge pipe and the water spout that is installed on the sparge pipe, and the sparge pipe connects
Lead to the water supply component；
Pressing member, the pressing member are installed on the sparge pipe；
Flow control component, the flow control component are installed on the sparge pipe and are located at the water spout and the pressurization part
Between part.
6. the water injector of cornering ratio test according to claim 5, which is characterized in that the institute of the sprinkler part
Water spout is stated in fish tail shape, and the water outlet size of the water spout is greater than water inlet size.
7. the water injector of cornering ratio test according to claim 5, which is characterized in that the water of the pressing member
Stream adjustable range is 1m3/h-60m3/ h, the water flow control range of the flow control component are 0L/s-20L/s.
8. the water injector of cornering ratio according to claim 5 test, which is characterized in that the water supply component includes
Car body and the water tank being installed on the car body.
9. a kind of cornering ratio test macro, which is characterized in that including the described in any item cross force systems of such as claim 6-8
The water injector of number test.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910333672.7A CN110031395B (en) | 2019-04-24 | 2019-04-24 | Transverse force coefficient testing method and road surface water film thickness control method |
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| CN201910333672.7A CN110031395B (en) | 2019-04-24 | 2019-04-24 | Transverse force coefficient testing method and road surface water film thickness control method |
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| CN110031395B CN110031395B (en) | 2021-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924081A (en) * | 2021-01-25 | 2021-06-08 | 北京科技大学 | Dynamic water pressure field test system and method for controlling depth of surface accumulated water |
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| EP0793207A2 (en) * | 1996-03-02 | 1997-09-03 | Daimler-Benz Aktiengesellschaft | Procedure for determining the road gripping of motor vehicle wheels |
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| CN107132060A (en) * | 2017-06-27 | 2017-09-05 | 山东建筑大学 | Tyre tread drainage experimental bench and experimental method |
| CN206954082U (en) * | 2017-07-18 | 2018-02-02 | 中国重型汽车集团唐山市宏远专用汽车有限公司 | A kind of road detection vehicle Sideway force coefficient test Two dimensional control water system |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0793207A2 (en) * | 1996-03-02 | 1997-09-03 | Daimler-Benz Aktiengesellschaft | Procedure for determining the road gripping of motor vehicle wheels |
| CN203259890U (en) * | 2013-04-17 | 2013-10-30 | 南京熙赢测控技术有限公司 | Automatic sprinkling device for road friction coefficient tester |
| CN203243777U (en) * | 2013-05-06 | 2013-10-23 | 长安大学 | Rail-mounted soil watering cart for laboratory |
| CN205941314U (en) * | 2016-08-27 | 2017-02-08 | 北京今谷神箭测控技术研究所 | Vehicular road surface transverse force friction coefficient test car |
| CN107132060A (en) * | 2017-06-27 | 2017-09-05 | 山东建筑大学 | Tyre tread drainage experimental bench and experimental method |
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| CN112924081A (en) * | 2021-01-25 | 2021-06-08 | 北京科技大学 | Dynamic water pressure field test system and method for controlling depth of surface accumulated water |
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