CN104406765B - Test method for dynamic lift of automobile wiper and test device thereof - Google Patents
Test method for dynamic lift of automobile wiper and test device thereof Download PDFInfo
- Publication number
- CN104406765B CN104406765B CN201410669724.5A CN201410669724A CN104406765B CN 104406765 B CN104406765 B CN 104406765B CN 201410669724 A CN201410669724 A CN 201410669724A CN 104406765 B CN104406765 B CN 104406765B
- Authority
- CN
- China
- Prior art keywords
- wiper
- thin plate
- wind
- pressure
- model
- 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
Links
Abstract
The invention relates to a test method for dynamic lift of automobile wiper and test device thereof. The test device includes an engine cover model configured to simulate the front of the automobile, a windscreen model configured to simulate the windscreen and install the wiper assembly, a rectangular thin plate configured to support the wiper, a synchronous device used for synchronization of the wiper and the thin plate, and a computer used for data storage and processing. Through the flow field simulation of the automobile wiper in a wind tunnel laboratory using the provided test method and test device, the dynamic pressure of the wiper in the conditions of wind and without wind can be obtained, and the dynamic lift of automobile wiper generated under the influence of wind can be calculated through a formula.
Description
Technical field
The present invention relates to a kind of automobile wiper dynamic lift method of testing and its test device are it is achieved that wiper is in work
The test of the aerodynamic lift during work.The invention belongs to automobile wiper aerodynamics Top-Down Design technical field.
Background technology
When travelling the rainy day, wiper is acted on automobile by air-flow, can produce an aerodynamic lift, in low speed, gas
Dynamic lift is less, does not affect the normal work of wiper；In high speed, aerodynamic lift increases, and wiper occurs unstable feelings
Condition, makes the wiper efficiency of itself reduce, leads to rainwater wiper unclean, and driver is in the visual field of windscreen for impact, thus
Impact travel safety.
In the case that speed gradually steps up, the high speed pneumatic stability of wiper is not but correspondingly improved.Mesh
Before, for the research of wiper aerodynamic lift, only with numerical value emulation method, but the result that numerical value emulation method obtains
Its correctness cannot be judged, lack persuasion.And experimental study accordingly can be complemented each other with numerical simulation, make result of study
Truer.Due to not having corresponding experimental study so far, the aerodynamics Top-Down Design of wiper is led to lack reliable
Instruct foundation, so just seldom consider the aerodynamic characteristic of wiper from aerodynamic angle.Therefore, the present invention is to wiper
Aerodynamics Top-Down Design has great importance.
Content of the invention
The purpose of the present invention is the lift during method test wiper motion by test, fills up current wiper air
The blank of dynamics Top-Down Design test method.Technical problem to be solved is how to simulate the working environment of real vehicle wiper
And how to test lower pressure during wiper motion.
Technical scheme is as follows：
This test device includes：
The model (hereinafter bonnet model) of one simulated automotive bonnet,
The model (hereinafter front windshield model) of one simulated automotive front windshield,
The thin plate of one support wiper,
The sychronisation of one wiper and thin plate,
A set of pressure testing system,
One collection and the computer of processing data.
The method of test wiper dynamic lift comprises the following steps：
Step one：Wiper, thin plate, sychronisation are arranged on front windshield model；
Step 2：Pressure sensor in pressure testing system is fixed between wiper and thin plate；
Step 3：Bonnet model is spliced with front windshield model in wind tunnel laboratory and fixes；
Step 4：Add the wind of certain wind speed in wind-tunnel, so that wiper is started working, test wiper is having the condition of wind
Under lower pressure, and record data；
Step 5：Wind speed in wind-tunnel is reduced to 0m/s, wiper maintenance work, test wiper is under conditions of calm
Lower pressure, and record data；
Step 6：By the data recording in step 4 and step 5, wiper can be calculated according to following computing formula
The dynamic lift being produced by wind effect.
FL=FP-FP'
In formula：FLFor the lift of wiper, unit is ox；FPAlways descend pressure for wiper under calm condition；FP' be
Wiper always descends pressure under windy condition.
Beneficial effects of the present invention are：
1st, this invention can be used for the experimental study of automobile wiper lift, currently without correlation test.
2nd, the test of dynamic lift when this invention can achieve automobile wiper work, currently without relevant test method.
3rd, the wiper value of lift order of magnitude is less, and the experimental enviroment of this invention is wind tunnel laboratory, eliminates outside major part
Portion's disturbing factor.
4th, this invention is easy to operate, and test efficiency is high, and different model wiper all can be used.
Brief description
Fig. 1 is automobile wiper dynamic lift test device structure chart；
Fig. 2 is thin plate and sychronisation connection figure；
Fig. 3 is wiper and sychronisation connection figure；
Fig. 4 is arranged in the schematic diagram on thin plate for pressure sensor；
Fig. 5 is wiper, pressure sensor, cushion block and thin plate constitutional diagram.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
The test device of the present invention and wiper mounting structure figure are referring to Fig. 1：Bonnet model 1, front windshield model 4, thin
Plate 3, sychronisation 8, pressure testing system 5, computer 6, wiper 2, wiper motor 7.
Thin plate 3 is connected by screw 9 with sychronisation 8, such as Fig. 2, the rotating shaft of wiper 2 is inserted in the in the hole of thin plate 3,
It is subsequently installed on wiper motor 7.Pressure wiper 2 is so as to be located at the centre position of thin plate 3.Again by sychronisation 8
Screw 12 is tightened, and compresses briquetting 11, so that compression wiper 2, so that wiper 2 is fixedly connected with thin plate 3, and both move completely same
Step, such as Fig. 3.Thin plate 3 requires outline and wiper 2 profile similarity, is so conducive to reducing thin plate 3 to wiper 2 surrounding stream
The impact of field.Thin plate 3 has certain width, so that arrangement pressure sensor 13, fall 30～45 degree of oblique angle at edge, and effect is
Avoid air-flow to occur separation to form turbulent flow in the edge of thin plate 3, and then affect the flow field quality around wiper.
3 to 5 pressure sensors 13 are fixed on thin plate 3 it is ensured that the pressure-sensitive region of pressure sensor 13 is located at scrapes water
Immediately below device 2, such as Fig. 4.Stick certain thickness cushion block 14 in the pressure-sensitive region of pressure sensor 13, effect is to make wiper 2
Original linear contact lay changes over several points and contacts between thin plate 3, and not in contact with region and thin plate leave the gap of very little,
As Fig. 5.The output line of pressure sensor 13 is arranged in the rear of wiper 2, and it is compliant good to smooth out with the fingers along thin plate 3 profile, at rotating shaft
Circular hole derive, so be conducive to reduce output line stream field impact.
Bonnet model 1 and front windshield model 4 be placed on correct position in test chamber it is ensured that two models
Longitudinally asymmetric face is parallel with the median plane of test chamber.Add weight to increase its stability inside model, prevent from testing
When there is security incident because model is unstable.Bonnet model 1 is anterior to be circular arc, plays guide functions, bonnet model 1 rear portion and
The string of a musical instrument angle of this two positions of angle reference car of front windshield model 4 upper surface；The length of the width ratio wiper 2 of model
Long about 30cm is it is ensured that the surrounding flow field of wiper 2 is close to truth.
Front windshield model 4 upper surface coat lubricant it is ensured that wiper 2 operationally, thin plate 3 and front windshield model 4
Between frictional force as far as possible little, to reduce the vibration that produces because of friction.
Measuring method using this measurement apparatus comprises the following steps：Connect wiper 2 power supply so as to normal work, this
When wiper 2, thin plate 3 and pressure sensor 13 synchronous hunting；The wind of certain wind speed will be added in wind-tunnel, such as 40km/h,
80km/h, 120km/h, to simulate the situation of low speed, middling speed, high speed.After stable, 5 to 10 motions of each speed acquisition
The dynamic pressure in cycle.Maintain wiper 2 to work, wind speed is reduced to 0, gather the dynamic pressure of the same number period of motion again
Power.For a certain pressure sensor 13, each cycle data under above-mentioned a certain speed is entered the handling averagely between line period, obtains
This pressure sensor 13 dynamic pressure value in this speed a cycle, the data after processing by following computational methods is
Can get the dynamic lift value of each speed of wiper 2.
Dynamic lift computational methods are as follows：Be located at calm in the case of record the dynamic pressure of each pressure sensor 13 respectively
For F1, F2, F3..., the dynamic pressure recording in the case of having wind is respectively F1', F2', F3' ....Because each pressure sensor
13 Impact direction are all vertical with front windshield model 4 upper surface, so gross pressure is equal to the pressure sum of each pressure sensor 13,
When the lift of wiper 2 is calm, wiper always descends pressure FPPressure F is always descended with respect to having during windP' knots modification, rise
Power is set to FL, then
FP=(F1+F2+F3+…)
FP'=(F1'+F2'+F3'+…)
FL=FP-FP' .
Claims (2)
1. a kind of method of testing of automobile wiper dynamic lift is it is characterised in that the method comprises the following steps：
Step one：Wiper (2), thin plate (3), sychronisation (8) are arranged on front windshield model (4)；
Step 2：By some pressure sensors (13) in pressure testing system (5) be fixed on wiper (2) and thin plate (3) it
Between；
Step 3：Bonnet model (1) is spliced in wind tunnel laboratory and fixes with front windshield model (4)；
Step 4：Add the wind of certain wind speed in wind-tunnel, so that wiper (2) is started working, test wiper (2) is having the bar of wind
Dynamically pressure is descended under part, and record data；
Step 5：Wind speed in wind-tunnel is dropped to 0m/s, wiper (2) maintenance work, test wiper (2) is in calm condition
Under dynamically descend pressure, and record data；
Step 6：By the data recording in step 4 and step 5, wiper wind-engaging can be calculated according to following computing formula
The dynamic lift that impact produces：
FL=FP-FP'
In formula：FLFor the lift of wiper, unit is ox；FPDynamically always descend pressure for wiper under calm condition；FP' be
Wiper dynamically always descends pressure under windy condition.
2. a kind of test device of automobile wiper dynamic lift is it is characterised in that this test device includes：
The model of one simulated automotive bonnet,
The model of one simulated automotive front windshield,
The thin plate of one support wiper,
The sychronisation of one wiper and thin plate,
A set of pressure testing system,
One collection and the computer of processing data；
Bonnet model (1) is hollow-core construction, and anterior for plane and have certain angle for circular arc, rear portion；
Front windshield model (4) is hollow-core construction, and upper surface is plane and has certain angle；There is a circle upper surface left front
Hole, the rotating shaft of wiper (2) be may be installed on the output shaft of wiper motor (7) by circular hole；
Thin plate (3) outline determines there is one fixed width according to wiper (2) outline；Edge bevelling, for water conservancy diversion, rotating shaft
There is circular hole one end, can be enclosed within wiper (2) rotating shaft；Thin plate (3) is connected with sychronisation (8) by screw (9)；
Sychronisation (8) integrally becomes U-shaped, including U-shaped body (10), two briquettings (11) and (4) individual screw (12)；U-shaped body (10)
Respectively there are two screwed holes both sides, and for cartridge screw (12), screw (12) can compress briquetting (11), and then compress wiper (2)；
The power delivery mode that thin plate (3), wiper (2), sychronisation (8) and pressure sensor (13) are realized being synchronized with the movement is
Wiper motor (7) wiper (2) sychronisation (8) thin plate (3) pressure sensor (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410669724.5A CN104406765B (en) | 2014-11-21 | 2014-11-21 | Test method for dynamic lift of automobile wiper and test device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410669724.5A CN104406765B (en) | 2014-11-21 | 2014-11-21 | Test method for dynamic lift of automobile wiper and test device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104406765A CN104406765A (en) | 2015-03-11 |
| CN104406765B true CN104406765B (en) | 2017-02-22 |
Family
ID=52644412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410669724.5A Expired - Fee Related CN104406765B (en) | 2014-11-21 | 2014-11-21 | Test method for dynamic lift of automobile wiper and test device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104406765B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131995A (en) * | 2017-06-30 | 2017-09-05 | 吉林大学 | A kind of Wiper pressing force distribution air tunnel testing device and wiper control method |
| CN108645594A (en) * | 2018-07-23 | 2018-10-12 | 吉林大学 | A kind of wind tunnel test simplification car model for research of making an uproar for interior wind |
| CN109827741B (en) * | 2018-12-26 | 2021-05-11 | 贵阳万江航空机电有限公司 | Method for detecting wind tunnel test parameters of wiper product |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10044172A1 (en) * | 2000-09-07 | 2002-03-21 | Valeo Auto Electric Gmbh | Pressure force distribution measuring device for windscreen wiper blade carrier element has sensor head of force measuring device displaced along slit in rail supporting carrier element |
| CN201072367Y (en) * | 2007-07-14 | 2008-06-11 | 常州纺织服装职业技术学院 | Pressure testing device of water scraper |
| CN102081036A (en) * | 2010-11-19 | 2011-06-01 | 贵阳万江航空机电有限公司 | Tester for frictional coefficient between rain wiper rubber strip and glass |
| CN202339181U (en) * | 2011-11-09 | 2012-07-18 | 浙江金刚汽车有限公司 | Torsional angle and pressure detection device for windshield wiper arm |
| CN202693176U (en) * | 2012-06-14 | 2013-01-23 | 浙江吉利汽车研究院有限公司杭州分公司 | Windscreen wiper arm pressing force testing and regulating device |
| CN104019787A (en) * | 2014-06-25 | 2014-09-03 | 贵阳万江航空机电有限公司 | Method and device for detecting torsional angle, arch rise and pressure of wiper arm |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100401790B1 (en) * | 2000-12-29 | 2003-10-17 | 현대자동차주식회사 | Wiper blade structure for an automobile |
| DE102005050773A1 (en) * | 2005-10-24 | 2007-04-26 | Robert Bosch Gmbh | Windscreen wiper device and method for operating a windscreen wiper device |
-
2014
- 2014-11-21 CN CN201410669724.5A patent/CN104406765B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10044172A1 (en) * | 2000-09-07 | 2002-03-21 | Valeo Auto Electric Gmbh | Pressure force distribution measuring device for windscreen wiper blade carrier element has sensor head of force measuring device displaced along slit in rail supporting carrier element |
| CN201072367Y (en) * | 2007-07-14 | 2008-06-11 | 常州纺织服装职业技术学院 | Pressure testing device of water scraper |
| CN102081036A (en) * | 2010-11-19 | 2011-06-01 | 贵阳万江航空机电有限公司 | Tester for frictional coefficient between rain wiper rubber strip and glass |
| CN202339181U (en) * | 2011-11-09 | 2012-07-18 | 浙江金刚汽车有限公司 | Torsional angle and pressure detection device for windshield wiper arm |
| CN202693176U (en) * | 2012-06-14 | 2013-01-23 | 浙江吉利汽车研究院有限公司杭州分公司 | Windscreen wiper arm pressing force testing and regulating device |
| CN104019787A (en) * | 2014-06-25 | 2014-09-03 | 贵阳万江航空机电有限公司 | Method and device for detecting torsional angle, arch rise and pressure of wiper arm |
Non-Patent Citations (2)
| Title |
|---|
| 汽车刮水器摩擦特性试验分析;张立军 等;《2009中国汽车工程学会年会论文集》;20091231;第294-299页 * |
| 汽车风窗玻璃电动刮水器耐久试验台设计;朱子川 等;《汽车电器》;20110731(第7(2011)期);第44-45页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104406765A (en) | 2015-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103471803B (en) | A kind of aerodynamic parameter defining method of model free flight test | |
| Li et al. | Experimental study on aerodynamic characteristics of high-speed train on a truss bridge: A moving model test | |
| CN101793591B (en) | Aircraft aero-servo-elasticity ground simulating test system | |
| CN104406765B (en) | Test method for dynamic lift of automobile wiper and test device thereof | |
| CN108871788B (en) | A kind of method of calibration of automatic transmission shift attribute test rack | |
| Wordley et al. | On-road turbulence: Part 2 | |
| CN104443427A (en) | Aircraft flutter prediction system and method | |
| CN108984862A (en) | A kind of aerodynamic characteristic CFD calculated result modification method | |
| CN109766627A (en) | A kind of analysis method of the pantograph unsteady characteristic based on slide plate spacing | |
| CN105712142A (en) | Elevator operating state detection system and method | |
| CN103837322A (en) | Hydrodynamic performance testing method of water surface aircraft | |
| D'Hooge et al. | Application of real-world wind conditions for assessing aerodynamic drag for on-road range prediction | |
| CN107976593A (en) | Energy expenditure test system in a kind of electric automobile operational process | |
| CN102818556A (en) | Vehicle road gradient detection method and device thereof | |
| CN110065452A (en) | A kind of evaluation method of new energy vehicle course continuation mileage | |
| Yamashita et al. | Unsteady aerodynamic response of a vehicle by natural wind generator of a full-scale wind tunnel | |
| TWI806670B (en) | A dynamic calculation method and device for the mass of an electric vehicle | |
| Dai et al. | Numerical study on aerodynamic performance of high-speed pantograph with double strips | |
| CN205643128U (en) | A way face friction coefficient test car | |
| CN103674221B (en) | Hydrostatic liquid bearing PIGA motor vibrations input, analysis and screening technique | |
| CN107462394A (en) | Multisensor wind-tunnel pole vibration suppression method based on smoothing prediction strategy | |
| CN103158718B (en) | Detection device and detection method of road longitudinal slope based on accelerator pedal position and vehicle speed | |
| CN209356159U (en) | A kind of device for the test of pantograph wind load | |
| CN108303231A (en) | A kind of test system for wind energy collecting device single vibration wind tunnel test | |
| Arsene et al. | The influence of wind on the pantograph placed on the railway electric vehicles bodywork |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170222 Termination date: 20211121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |