CN106052934B - A kind of running state of the vehicle parameter indirect measurement system and scaling method - Google Patents
A kind of running state of the vehicle parameter indirect measurement system and scaling method Download PDFInfo
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- CN106052934B CN106052934B CN201610319418.8A CN201610319418A CN106052934B CN 106052934 B CN106052934 B CN 106052934B CN 201610319418 A CN201610319418 A CN 201610319418A CN 106052934 B CN106052934 B CN 106052934B
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- 238000005259 measurement Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000010727 cylinder oil Substances 0.000 claims abstract description 8
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012417 linear regression Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of running state of the vehicle parameter indirect measurement system and scaling method, the operation conditions parameter includes brake force, and described device includes: chassis dynamometer, fender pile, tension sensor.The running state of the vehicle parameter measure indirectly scaling method include: by vehicle parking on vehicle chassis dynamometer rotary drum；Hydrostatic sensor is accessed in wheel cylinder oil pipe；Starting vehicle simultaneously accelerates to 70km/h；Brake pedal is to half；The Result of Indirect Measurement of running state of the vehicle parameter is calculated by vehicle chassis dynamometer and tension sensor data；Result of Indirect Measurement and wheel cylinder oil pressure are compared；Indirect measurement is demarcated according to comparing result.The present invention is suitble to measure the calibration of vehicle braking force indirectly using chassis dynamometer, and keeps Result of Indirect Measurement more accurate；Guarantee can measure parameter by chassis dynamometer and find out vehicle braking force, while can guarantee that indirect measurement accuracy is close with direct measurement accuracy again, greatly improve convenience, the validity of vehicle braking force measurement.
Description
Technical field
The present invention relates to running state of the vehicle parameter measurement fields more particularly to a kind of running state of the vehicle parameter to survey indirectly
Measure device and scaling method.
Background technique
Automobile operating state parameter and the operational safety of automobile are closely related, including parameters such as brake force.2015
China's car ownership up to 1.72 hundred million, a large amount of motor-vehicle accident be all because brake force is not up to standard caused by, especially for
Cargo transport vehicle because accident often will cause great personnel and economic loss caused by it, therefore should more focus on concern system
Dynamic testing.
Patent 201410578676.9 whether there is problem using receiving module and judgment module detection vehicle braking, but not
Detection module is referred to, using only certain direct measuring method to the reasonability of vehicle brake signal and master cylinder pressure signal and mutually
Between synchronism diagnosed, not to measurement scene be required, than such as whether needing dynamometer machine；Patent 201510028605.6 makes
Half virtual vehicle in kind is constituted with the power assembly in the auto model without power assembly and base frame module, passes through power
Assembly location mode information and the traffic information of road model output calculate the moment of resistance and are realized by measurement of power unit, although the patent
Using dynamometer machine, but it is only used for simulating vehicle, cannot real vehicles be carried out with effective measurement of operation conditions parameter, it can not be to whole
Vehicle is surveyed；Patent 201410384563.5 calculates braking moment according to brake pedal displacement signal, although brake pedal
There are certain relationships with braking moment for displacement, but since the brake pedal of each vehicle height is adjustable, and different brands model
Both relationship of vehicle is not necessarily identical, so to demarcate to each vehicle.
Chassis dynamometer is widely used to the Measuring error of vehicle at present, but chassis dynamometer can not reflect vehicle completely
Brake force, be also not applied to the indirect measurement of these parameters, how to be calculated using chassis dynamometer to measure parameter indirectly
Vehicle braking force out, to obtain vehicle actual operating state parameter, accurately effectively to avoid brake force caused vehicle not up to standard
Safety accident occurs, and the technology of this respect does not have developmental research so far.
Summary of the invention
To solve the problems, such as above-mentioned and defect, the present invention provides a kind of running state of the vehicle parameters to measure indirectly
Device and scaling method improve the convenience and reliability of running state of the vehicle parameter measurement, realize that brake force measures indirectly.
The object of the invention can be realized by technical measures below: a kind of running state of the vehicle parameter measures dress indirectly
It sets, comprising:
Chassis dynamometer, rear defence fender pile, post-tensioning force snesor for being in contact with tested vehicle wheel, rear defence fender pile are solid
It is scheduled on rear side of chassis dynamometer, post-tensioning force snesor is connected between rear defence fender pile and the rear end of tested vehicle through hawser；
In the state of being braked after tested vehicle reaches 70km/h, by obtaining on existing vehicle chassis dynamometer
Rotary drum pressure FTL, lever length LT, rotary drum radius RT, radius of wheel R on vehicleV, vehicle drive shaft radius DVFAnd post-tensioning
The reading F of force snesorVF, obtain the Result of Indirect Measurement brake force F of running state of the vehicle parameterS。
The fender pile is equipped with cable hole, fixes convenient for the drawing of tension sensor.
The tension sensor includes pulling force transmitting portions, force-sensing parts and segment signal output, and force-sensing parts two sides are set
There are pulling force transmitting portions, pulling force transmitting portions are equipped with hawser connecting hole, the output end connection signal output section of force-sensing parts
Point, segment signal output is shielded cable output, is connected for outer signals line.
A kind of scaling method of running state of the vehicle parameter indirect measurement system, comprising:
A is by vehicle parking on vehicle chassis dynamometer rotary drum；And pass through hawser for post-tensioning force snesor, tested vechicle
, fender pile connection tense；
Hydrostatic sensor is accessed in tested vehicle wheel cylinder oil pipe and surveys actual hydraulic braking force by B；
C starting vehicle simultaneously accelerates to 70km/h；
D brake pedal is to half；
E is tied by the indirect measurement that vehicle chassis dynamometer and tension sensor data calculate running state of the vehicle parameter
Fruit.
F compares Result of Indirect Measurement and wheel cylinder oil pressure；
G demarcates indirect measurement according to comparing result.
The beneficial effect of the technical scheme provided by the present invention is that:
The present invention is suitble to measure the calibration of vehicle braking force indirectly using chassis dynamometer, and makes Result of Indirect Measurement more
Accurately；Guarantee can measure parameter by chassis dynamometer and find out vehicle braking force, at the same can guarantee again indirect measurement accuracy with
Direct measurement accuracy is close, greatly improves convenience, the validity of vehicle braking force measurement.
Detailed description of the invention
Fig. 1 is running state of the vehicle parameter indirect measurement system total arrangement schematic diagram；
Fig. 2 is single roller road simulation dynamometer structural schematic diagram；
Fig. 3 fender pile structural schematic diagram；
Fig. 4 tension sensor structural schematic diagram；
Fig. 5 running state of the vehicle parameter indirect measurement system demarcation flow figure.
Specific embodiment
Below in conjunction with attached drawing, embodiment of the present invention is described further in detail:
Referring to Fig. 1, the present embodiment running state of the vehicle parameter indirect measurement system, including chassis dynamometer 101, rear protecting
Stake 102, post-tensioning force snesor 103, for being in contact with tested vehicle wheel, rear defence fender pile 102 is fixed on chassis dynamometer 101
On ground on rear side of chassis dynamometer；Post-tensioning force snesor 103 is connected to the rear end of rear defence fender pile 102 Yu tested vehicle through hawser
Between；Fender pile is connected by hawser with tension sensor, for avoiding vehicle derailing rotary drum.
Such as Fig. 2, above-mentioned two fender pile has to be made of foundation bolt 301, main body 302, cable hole 303, the lower margin
Fender pile main body 302 is fixed on ground by bolt 301, and cable hole 303 is placed in fender pile main body, is connected and fixed convenient for hawser；
Such as Fig. 3, the S type pressure sensing of Shanghai Di Jia sensing Science and Technology Ltd. is can be used in above-mentioned two tension sensor
Device DJSX-50, including pulling force transmitting portions 401, force-sensing parts 402 and segment signal output 403,402 two sides of force-sensing parts are set
Pulling force transmitting portions are set, pulling force transmitting portions are equipped with hawser connecting hole, the output end connection signal output section of force-sensing parts
Divide 403, segment signal output is shielded cable output, is connected for outer signals line.
Such as Fig. 4, the existing chassis dynamometer 101 selected in the present embodiment is by pressure sensor 201, lever 202, gearbox
203, rotary drum 204, velocity sensor 205, clutch 206, electric eddy current dynamometer 207, bearing block 208, shaft coupling 209, belt
Wheel 210 and flywheel 211 form, and pressure sensor 201 is connected by lever 202 with electric eddy current dynamometer 207, rotary drum 204 and
Tested vehicle tire is in contact, and above-mentioned rotary drum uses single-cylinder type.
Such as the demarcation flow figure that Fig. 5 is above-mentioned running state of the vehicle parameter indirect measurement system, specific implementation steps are such as
Under:
Step 501, which contacts the front-wheel on the rotary drum 204 of running car to be measured to dynamometer machine 101, making automobile to be measured, to be turned
On drum 204；
Automobile rear is connected by step 502 with hawser with the pulling force transmitting portions 401 of tension sensor 103 respectively；
Post-tensioning force snesor 103 is connect by step 503 by hawser with fender pile, and tightens hawser as possible, makes pulling force
Sensor reaches 300N, and vehicle is still static at this time, and existing pulling force reading is needed through subsequent compensation calculation processing at this time；
The segment signal output 403 of tension sensor 103 is connected to acquisition device by step 504；
Step 505 is accessed in automobile wheel cylinder oil pipe to be measured with hydrostatic sensor, for surveying actual hydraulic braking force, i.e., oily
Pressure
Step 506 starting vehicle is simultaneously accelerated forwardly to 70km/h, brake pedal to half, is kept；
Step 507 obtains the test data of vehicle chassis dynamometer and tension sensor at this time, including rotary drum pressure
FTLWith post-tensioning sensor readings FVF, lever length LT, rotary drum radius RT, radius of wheel RV, vehicle drive shaft radius DVF?
It measures in advance.The Result of Indirect Measurement brake force F of running state of the vehicle parameter is calculated according to the parameter of above-mentioned acquisitionS, braking
Power FSFor the amount of real-time change, calculate that process is as follows:
1. known rotary drum pressure FTL, post-tensioning sensor readings FVF, 202 length L of leverT, rotary drum radius RT, radius of wheel RVAnd vehicle
Driving shaft radius DVF, seek brake force FS, that is, have
Wherein wheel torque TV=-LTFTLRV/RT, R in formulaT、LT、RV、DVFConstant can then be regarded as once measurement, to there is FS=FS(FTL,
FVF), i.e. FSIt can be by FTL,FVFTwo variables are found out.Since wheel cylinder oil pressure is directly proportional to normal pressure on brake block is applied to, brake
On piece normal pressure is directly proportional to frictional force, so brake force FSThere are linear relationships with oil pressure；
2. setting measurement oil pressure F indirectlyS', due to the resulting brake force F of above-mentioned calculatingSThere are linear relationships with oil pressure, that is, make
Power FSWith indirect measurement oil pressure FS' there are linear relationships, then oil pressure is measured indirectlyWherein a indicates that Monomial coefficient, i.e. slope, b indicate constant term,
It is found out in linear regression fit equation using least square methodThe respectively estimated value of a, b, then have To measure oil pressure estimated value indirectly.
Step 508 will measure oil pressure estimated value indirectlyWith the oil pressure directly measured from step 505 wheel cylinderInto
Row comparison, the two is " time --- pressure " curve, according to comparing result to indirect measurement brake force FSIt is demarcated.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of running state of the vehicle parameter indirect measurement system, characterized by comprising:
Chassis dynamometer for being in contact with tested vehicle wheel, rear defence fender pile, post-tensioning force snesor, rear defence fender pile are fixed on
On rear side of chassis dynamometer；Post-tensioning force snesor is connected between rear defence fender pile and the rear end of tested vehicle through hawser；
In the state of being braked after tested vehicle reaches 70km/h, by obtaining the rotary drum pressure F on chassis dynamometerTL、
Lever length LT, rotary drum radius RT, radius of wheel RV, vehicle drive shaft radius DVFAnd the reading F of post-tensioning force snesorVF, obtain
The Result of Indirect Measurement brake force F of running state of the vehicle parameter outS,
2. a kind of running state of the vehicle parameter indirect measurement system according to claim 1, it is characterised in that: the protection
Stake is equipped with the cable hole fixed convenient for tension sensor drawing.
3. a kind of running state of the vehicle parameter indirect measurement system according to claim 1 or 2, it is characterised in that: described
Tension sensor includes pulling force transmitting portions, force-sensing parts and segment signal output, and force-sensing parts two sides are equipped with pulling force transfer part
Point, pulling force transmitting portions are equipped with hawser connecting hole, the output end connection signal output par, c of force-sensing parts, signal output section
It is divided into shielded cable output, is connected for outer signals line.
4. a kind of scaling method of running state of the vehicle parameter indirect measurement system, characterized by comprising:
A is by vehicle parking on vehicle chassis dynamometer rotary drum；And by hawser by post-tensioning force snesor, tested vehicle, anti-
Fender pile connection tenses；
Hydrostatic sensor is accessed in tested vehicle wheel cylinder oil pipe and surveys actual hydraulic braking force by B；
C starting vehicle simultaneously accelerates to 70km/h；
D brake pedal is to half；
E is calculated between running state of the vehicle parameter by obtaining the test data of vehicle chassis dynamometer and tension sensor
Connect measurement result brake force；
F compares Result of Indirect Measurement brake force and step B wheel cylinder oil pressure；
G demarcates indirect measurement brake force according to comparing result.
5. a kind of scaling method of running state of the vehicle parameter indirect measurement system according to claim 4, feature exist
In: the test data of acquisition chassis dynamometer and tension sensor includes: the rotary drum pressure F on chassis dynamometerTL, lever length
LT, rotary drum radius RT, obtaining vehicle parameter includes radius of wheel RV, vehicle drive shaft radius DVF, obtain the reading of post-tensioning force snesor
Number FVF。
6. a kind of scaling method of running state of the vehicle parameter indirect measurement system according to claim 4, feature exist
In: subsequent compensation processing is carried out to the reading generated in tension sensor in step A.
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| CN201610319418.8A CN106052934B (en) | 2016-05-13 | 2016-05-13 | A kind of running state of the vehicle parameter indirect measurement system and scaling method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771746B (en) * | 2016-12-20 | 2019-05-14 | 中国电器科学研究院有限公司 | A kind of electric car dynamic operation condition electromagnetic disturbance fast appraisement method |
| CN107703747B (en) * | 2017-10-09 | 2020-01-03 | 东南大学 | Friction stir welding application-oriented dynamic parameter self-calibration method for heavy-load robot |
| CN108152050B (en) * | 2017-12-22 | 2020-02-14 | 南京越博动力系统股份有限公司 | Finished automobile parameter calibration method |
| CN112629738B (en) * | 2020-12-18 | 2024-12-10 | 舜泰汽车有限公司 | A braking force calibration system for unmanned vehicles |
| CN113916442B (en) * | 2021-10-14 | 2022-11-25 | 安徽江淮汽车集团股份有限公司 | Torque calibration method and system for transmission shaft of vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519064A (en) * | 2008-02-29 | 2009-09-02 | 株式会社日立制作所 | Braking device |
| CN101893495A (en) * | 2010-06-25 | 2010-11-24 | 浙江江兴汽车检测设备有限公司 | Integrated multifunctional automobile chassis dynamometer |
| CN102195464A (en) * | 2010-03-16 | 2011-09-21 | 刘非 | Power factor correction circuit and control method thereof |
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2016
- 2016-05-13 CN CN201610319418.8A patent/CN106052934B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519064A (en) * | 2008-02-29 | 2009-09-02 | 株式会社日立制作所 | Braking device |
| CN102195464A (en) * | 2010-03-16 | 2011-09-21 | 刘非 | Power factor correction circuit and control method thereof |
| CN101893495A (en) * | 2010-06-25 | 2010-11-24 | 浙江江兴汽车检测设备有限公司 | Integrated multifunctional automobile chassis dynamometer |
Non-Patent Citations (1)
| Title |
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| 全驱车辆制动性能台架稳态检测约束系统研究;李蒙蒙;《工程科技Ⅱ辑》;20130815;第5章 |
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Address after: 510302 No. 204 Xingang West Road, Haizhu District, Guangzhou City, Guangdong Province Patentee after: China Electrical Appliance Research Institute Co., Ltd. Address before: 510302 No. 204 West Xingang Road, Guangdong, Guangzhou Patentee before: China National Electric Apparatus Research Institute Co., Ltd. |
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