CN201434818Y - Road Surface Friction Coefficient Test Vehicle - Google Patents
Road Surface Friction Coefficient Test Vehicle Download PDFInfo
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- CN201434818Y CN201434818Y CN200920109314XU CN200920109314U CN201434818Y CN 201434818 Y CN201434818 Y CN 201434818Y CN 200920109314X U CN200920109314X U CN 200920109314XU CN 200920109314 U CN200920109314 U CN 200920109314U CN 201434818 Y CN201434818 Y CN 201434818Y
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
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- 238000005259 measurement Methods 0.000 description 5
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Abstract
本实用新型涉及“路面摩擦系数测试车”，属于道路工程施工领域，包括两个测试轮、配重箱和牵引连接架，其特征在于：所述测试轮通过轴连接在一起，所述配重箱下方固定连接有竖梁，所述竖梁通过轴承与轴连接，所述牵引连接架的一端固定在竖梁，另一端与外接设备相连，所述牵引连接架与竖梁之间还连接有测力计，所述测力计与数据记录器电连接。本实用新型提出的摩擦系数测试车可以在车辆正常行驶速度下，测定路面表面的摩擦系数，克服了以往固定点、速度低的条件下与车轮高速行驶条件下，路面摩擦系数的表现存在差异的问题，同时还可以测定出不同速度下的摩擦系数值。通过改变车辆的配重，可以测定在不同的轮胎接地压力条件下的路面摩擦系数值。
The utility model relates to a "road surface friction coefficient test vehicle", which belongs to the field of road engineering construction, and comprises two test wheels, a counterweight box and a traction connecting frame. A vertical beam is fixedly connected, and the vertical beam is connected to the shaft through a bearing. One end of the traction connecting frame is fixed on the vertical beam, and the other end is connected to an external device. A force-measuring gauge, which is electrically connected to the data logger. The friction coefficient test vehicle proposed by the utility model can measure the friction coefficient of the road surface under the normal driving speed of the vehicle, which overcomes the difference between the performance of the road surface friction coefficient under the condition of fixed point and low speed and the high-speed driving condition of the wheel in the past. Problems, at the same time can also measure the value of the coefficient of friction at different speeds. By changing the weight of the vehicle, the road surface friction coefficient value under different tire ground pressure conditions can be determined.
Description
Technical field
The utility model is mainly used in the scientific research of road engineering field, design and construction field, is designed for the mensuration of pitch or cement pavement skin-friction coefficient especially.
Background technology
The friction factor on road surface is an important indicator of road surface usability, and the big young pathbreaker of friction factor directly influences the driving safety of vehicle, and is along with the continuous development of high-speed transit, also more and more higher for the requirement of road table function.In recent years, the ground surface material of developing at raising road surface friction factor is varied, all effectively raises the friction, capability of road table as the appearance of multiple materials such as antiskid top layer AK series, ultra-thin asphaltum concrete cover-layer.But, current method of testing for road table friction factor is still main based on traditional friction coefficient instrument, the weak point of this method is that (1) its mensuration is at point of fixity, the Indirect evaluation that under the condition of low speed the friction, capability of road surfaces is given, fall after level altitude is hammered in swing arm that the end has the rubber slide block into shape by promoting, measure the pendulum rise of slide block behind the friction eceleration of road surface and estimate the friction size of road table and rubber piece, its index parameter is not a friction factor itself, but passes through the height value indirect expression of balancing point; (2) simultaneously, because its test is that pointwise is carried out, length consuming time, intensity is big, and efficient is low, is unfavorable for comprehensively obtaining fast in the road surface is checked and accepted or detected on a large scale traffic information; (3) significance of friction factor is to embody vehicle in process is run at high speed on the road surface, rolling friction between tire and the road table is to the influence of vehicle adhesion, it is measured also should be under high speed, the true effect of vehicular load, the coefficient of rolling friction in the tire rolling process.Therefore, be necessary to develop a kind of can the actual measurement under the high vehicle speeds state, the equipment of Lu Biao and wheel effect friction factor satisfies the requirement that the road surface functions of use detects.
The utility model content
At the blank in this area, the utility model provides a kind of and can measure under the different kinds of tyre ground pressure under normal vehicle operation speed, and the testing equipment of road surface friction factor is a pavement friction coefficient testing car.
Pavement friction coefficient testing car, comprise two testing wheels, ballast box and traction link, it is characterized in that: described testing wheel links together by axle, described ballast box below is fixedly connected with vertical beam, described vertical beam is connected with axle by bearing, and an end of described traction link is fixed on vertical beam, and the other end links to each other with external equipment, also be connected with dynamometer between described traction link and the vertical beam, described dynamometer is electrically connected with data recorder.
On the wheel hub of described testing wheel knotmeter is installed, the signal receiver that can receive tachometer signal is installed on the described ballast box, described signal receiver is electrically connected with data recorder.
One end of described signal receiver is fixed in the outside of ballast box, and the other end is a free end, nestles up knotmeter.
Be fixed with the vehicle frame balance device on the described vertical beam, described vehicle frame balance device is made up of a leveling board and a vertical plate, and is fixed together in T type mode, and described traction link is fixedlyed connected with the leveling board in the vehicle frame balance device.
Two machinists clamps are arranged on the described traction link, and the leveling board in the described vehicle frame balance device snaps in two machinists clamps, is bolted to connection.
One end of described dynamometer is fixed on the traction link, and the other end is fixed on the vertical panel in the vehicle frame balance device, and dynamometer is arranged on the surface of leveling board of vehicle frame balance device.
Described dynamometry is counted a hydraulic oil cylinder type dynamometer.
Be provided with balancing weight in the described ballast box.
Also be fixed with vibroshock on the described axle.
Also be fixed with bracing frame on the described vertical beam, be positioned at the front and/or the back of wheel.
Central principle of the present utility model is: the force of rolling friction P of automobile
fBe wheel when on the road surface, rolling, the friction force that produces because of road surface and squeegee action.It is relevant with road surface kind, state, the speed of a motor vehicle, tire construction and charge pressure.Force of rolling friction is directly proportional with loading of tire (axle carries) G, that is:
P
f＝fG
In the formula: G---wheel load (N);
F---coefficient of rolling friction, relevant with the multiple factors such as character of pavement behavior, travel speed, tire.
Utilize the relation of friction force and friction factor, by measuring wheel required pulling force in the road surfaces rolling process, the coefficient of rolling friction between inverse wheel and the road surface.
Axle under the actual measurement vehicle frame no-load condition carries, or the balancing weight of configuration varying number, finishes the counterweight of frame system and frame.By the actual measurement contact area, calculate the ground connection pressure of tire.Note as the preset parameter of measuring.Then, external equipment external force traction car is linked to each other by the traction link with the utility model friction factor car, connect dynamometer, check that signal affirmation data transmission is normal, finish the installation and the debugging of each system.Travel with certain speed drawing friction coefficient car, after reaching the required speed of test, remain a constant speed and advance, arrive test segment, turn-on data register (can be placed in the tractor) is gathered the speed of a motor vehicle and pulling force corresponding data, in this process, should note keeping speed steadily and road conditions stable, test segment should be no less than 100 meters accordingly.The mean value of getting all data in the test section is as test result.
Because friction factor is relevant with the speed of a motor vehicle, therefore the utility model is equipped with knotmeter and sensor on testing wheel, signal receiver is installed on ballast box simultaneously, when car moves ahead, wheel, signal receiver links to each other with data recorder, notes the number of turns and the time relation of wheel, can determine the speed of a motor vehicle, thus the relation of the speed of a motor vehicle of determining and pulling force.
The utility model also is equipped with a vehicle frame balance device between tractive force and vertical beam, this device is the plate that the T type is fixed together by two and forms, and can be used for torsion that the balancing a survey car produces in advancing etc.
The utility model also is provided with two bracing frames, is used to support the utility model car and parks reliable when not working.
The utility model can also be adjusted vehicular load by the balancing weight of configuration different quality in ballast box, obtains different tire ground connection pressure.In addition, can also dispose temperature, humidity sensor as required, with the warm and humid situation in record test moment highway section.
With respect to prior art, test carriage of the present utility model has following advantage and effect:
1. the friction coefficient testing car that the utility model proposes can be under normal vehicle operation speed, measure the friction factor of road surface, overcome under the low condition of point of fixity in the past, speed with wheel and run at high speed under the condition, the problem that the performance of surface friction coefficient there are differences can also determine the friction co-efficient value under the friction speed simultaneously.
2. the friction factor car that the utility model proposes can be determined under the different tyre contact pressure conditions friction co-efficient value on road surface by change the counterweight of vehicle in the vehicle frame Weighting system.
Description of drawings
Fig. 1 is of the present utility model to be taken the structure master apart and looks synoptic diagram;
Fig. 2 structure schematic side view of the present utility model;
Each label lists as follows among the figure:
The 1-ballast box, the 2-knotmeter, the 3-testing wheel, 4-vehicle frame balance device, 5-draws link, 6-vertical beam, 7-vibroshock, 8-bracing frame, 9-hydraulic oil cylinder type dynamometer, 10-axle, 12-signal receiver.
Embodiment
As Fig. 1, shown in Figure 2, pavement friction coefficient testing car, comprise by axle 10 two testing wheels 3 that link together, be positioned at the ballast box 1 of testing wheel 3 tops, with traction link 5, ballast box 1 below is fixedly connected with vertical beam 6, described vertical beam 6 is connected with axle 10 by bearing, one end of described traction link 5 links to each other with external equipment (as the external force traction car), the other end is fixed on the vertical beam 6, also be connected with hydraulic jack dynamometer 9 between described traction link 5 and the vertical beam 6, described hydraulic jack dynamometer 9 is connected (data recorder is placed in the tractor, does not mark among the figure) with data recorder.Axle under the actual measurement vehicle frame no-load condition carries (promptly having only ballast box and vertical beam), by the actual measurement contact area, calculates the ground connection pressure of tire, can calculate the wheel load, notes as the preset parameter of measuring.Then, the external force traction car is linked to each other by traction link 5 with the utility model friction factor car, connect hydraulic jack dynamometer 9, check that signal affirmation data transmission is normal, finish the installation and the debugging of each system.Travel with certain speed drawing friction coefficient car, after reaching the required speed of test, remain a constant speed and advance, arrive test segment, the turn-on data register is gathered corresponding pulling force data, obtains the friction force under the certain speed, and counter pushing away obtains friction co-efficient value.
On the wheel hub of described testing wheel 3 knotmeter is installed, the outside of described ballast box 1 is equipped with the signal receiver 12 that can receive tachometer signal, the other end of described signal receiver 12 is a free end, nestles up knotmeter, and described signal receiver 12 is connected with data recorder.Data recorder can be noted the relation of speed and pulling force.
Be fixed with vehicle frame balance device 4 on the described vertical beam 6, described vehicle frame balance device 4 is snapped in two machinists clamps by a leveling board and a vertical plate, is bolted to connection.Vehicle frame balance device 4 can be used for torsion that the balancing a survey car produces etc. in advancing.One end of hydraulic oil cylinder type dynamometer 9 is fixed on the traction link 5, and the other end is fixed on the vertical panel in the vehicle frame balance device 4, and is fixed on the surface of the leveling board in the vehicle frame balance device.
Described ballast box 1 is provided with balancing weight, can adjust vehicular load by the balancing weight of configuration different quality in ballast box 1, obtains different tire ground connection pressure.Also be fixed with vibroshock 7 on the described axle 10, reduce test carriage road conditions influence in advancing testing.
Also be fixed with bracing frame 8 on the described perpendicular frame 6, be positioned at the front and/or the back of testing wheel 3, it is reliable that the utility model car is parked when not working.
In addition, the utility model can also dispose temperature, humidity sensor as required, with the warm and humid situation in record test moment highway section.
Claims (10)
1, pavement friction coefficient testing car, comprise two testing wheels, ballast box and traction link, it is characterized in that: described testing wheel links together by axle, described ballast box below is fixedly connected with vertical beam, described vertical beam is connected with axle by bearing, and an end of described traction link is fixed on vertical beam, and the other end links to each other with external equipment, also be connected with dynamometer between described traction link and the vertical beam, described dynamometer is electrically connected with data recorder.
2, pavement friction coefficient testing car according to claim 1, it is characterized in that: on the wheel hub of described testing wheel knotmeter is installed, the signal receiver that can receive tachometer signal is installed on the described ballast box, and described signal receiver is electrically connected with data recorder.
3, pavement friction coefficient testing car according to claim 1 is characterized in that: an end of described signal receiver is fixed in the outside of ballast box, and the other end is a free end, nestles up knotmeter.
4, pavement friction coefficient testing car according to claim 1, it is characterized in that: be fixed with the vehicle frame balance device on the described vertical beam, described vehicle frame balance device is made up of a leveling board and a vertical plate, and be fixed together in T type mode, described traction link is fixedlyed connected with the leveling board in the vehicle frame balance device.
5, pavement friction coefficient testing car according to claim 4 is characterized in that: described traction link has two machinists clamps, and the leveling board in the described vehicle frame balance device snaps in two machinists clamps, is bolted to connection.
6, pavement friction coefficient testing car according to claim 4, it is characterized in that: an end of described dynamometer is fixed on the traction link, the other end is fixed on the vertical panel in the vehicle frame balance device, and dynamometer is arranged on the surface of leveling board of vehicle frame balance device.
7, pavement friction coefficient testing car according to claim 1 is characterized in that: described dynamometry is counted a hydraulic oil cylinder type dynamometer.
8, pavement friction coefficient testing car according to claim 1 is characterized in that: be provided with balancing weight in the described ballast box.
9, pavement friction coefficient testing car according to claim 1 is characterized in that: also be fixed with vibroshock on the described axle.
10, pavement friction coefficient testing car according to claim 1 is characterized in that: also be fixed with bracing frame on the described vertical beam, be positioned at the front and/or the back of wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920109314XU CN201434818Y (en) | 2009-06-23 | 2009-06-23 | Road Surface Friction Coefficient Test Vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920109314XU CN201434818Y (en) | 2009-06-23 | 2009-06-23 | Road Surface Friction Coefficient Test Vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201434818Y true CN201434818Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920109314XU Expired - Lifetime CN201434818Y (en) | 2009-06-23 | 2009-06-23 | Road Surface Friction Coefficient Test Vehicle |
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| Country | Link |
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| CN (1) | CN201434818Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175776A (en) * | 2013-03-14 | 2013-06-26 | 北京中路安交通科技有限公司 | Test system for aggregate friction coefficient of truck escape ramp |
| CN106702861A (en) * | 2017-03-21 | 2017-05-24 | 中汽中心盐城汽车试验场有限公司 | Grinding trailer for testing road surfaces and grinding vehicle group |
| CN112666073A (en) * | 2020-12-15 | 2021-04-16 | 北京科技大学 | Full-scale pavement acceleration loading device with pavement lateral force coefficient testing function |
| CN114594045A (en) * | 2022-03-10 | 2022-06-07 | 重庆交通大学 | Continuous detector for road surface friction performance |
-
2009
- 2009-06-23 CN CN200920109314XU patent/CN201434818Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175776A (en) * | 2013-03-14 | 2013-06-26 | 北京中路安交通科技有限公司 | Test system for aggregate friction coefficient of truck escape ramp |
| CN106702861A (en) * | 2017-03-21 | 2017-05-24 | 中汽中心盐城汽车试验场有限公司 | Grinding trailer for testing road surfaces and grinding vehicle group |
| CN112666073A (en) * | 2020-12-15 | 2021-04-16 | 北京科技大学 | Full-scale pavement acceleration loading device with pavement lateral force coefficient testing function |
| CN114594045A (en) * | 2022-03-10 | 2022-06-07 | 重庆交通大学 | Continuous detector for road surface friction performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100331 |