CN106052934A - Indirect measuring apparatus for vehicle operation status parameter and calibration method - Google Patents
Indirect measuring apparatus for vehicle operation status parameter and calibration method Download PDFInfo
- Publication number
- CN106052934A CN106052934A CN201610319418.8A CN201610319418A CN106052934A CN 106052934 A CN106052934 A CN 106052934A CN 201610319418 A CN201610319418 A CN 201610319418A CN 106052934 A CN106052934 A CN 106052934A
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- vehicle
- chassis dynamometer
- running state
- pulling force
- sensor
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Classifications
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- 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 an indirect measuring apparatus for a vehicle operation status parameter and a calibration method. The operation status parameter includes a brake power. The apparatus includes: a chassis dynamometer, a fender pile, and a drawing force transducer. The calibration method includes the following steps: parking a vehicle on a rotary drum of the chassis dynamometer of the vehicle; connecting a hydraulic sensor to a wheel cylinder oil pipe; starting the vehicle and accelerating the vehicle to 70 km/h; treading a brake pedal to a half position; calculating an indirect measuring result of the vehicle operation status parameter on the basis of the chassis dynamometer of the vehicle and the drawing force transducer; comparing the indirect measuring result with the wheel cylinder oil pressure; and on the basis of a comparing result, calibrating the indirect measuring. According to the invention, the apparatus and the method are suitable to use the chassis dynamometer to conduct calibration on indirect measuring of the vehicle brake power and make an accurate indirect measuring result. The apparatus and the method guarantee measure parameters through the chassis dynamometer and solve the vehicle brake power, and at the same time guarantee similarity between indirect measuring precision and direct measuring precision, and greatly increase convenience and effectiveness in measuring the vehicle brake power.
Description
Technical field
The present invention relates to running state of the vehicle parameter measurement field, particularly relate to a kind of running state of the vehicle parameter and indirectly survey
Amount device and scaling method.
Background technology
Automobile operating state parameter is closely related, including parameters such as brake force with the operation of automobile safety.2015
China's automobile pollution reaches 1.72 hundred million, and substantial amounts of motor-vehicle accident is all because that brake force is the most up to standard to be caused, especially for
Freight wagon, because its accident caused often causes great personnel and economic loss, the most more should pay close attention to emphatically system
Dynamic testing.
Patent 201410578676.9 use accepts module and whether judge module detection car braking has problems, but not
Mention detection module, only use certain direct measuring method to vehicle brake signal and the reasonability of master cylinder pressure signal and mutually
Between synchronicity diagnose, not to measure scene be required, such as the need of dynamometer machine；Patent 201510028605.6 makes
Constitute half virtual car load in kind with the auto model without power assembly with the power assembly in base frame module, pass through power
The traffic information of assembly location mode information and road model output calculates the moment of resistance and is realized by measurement of power unit, although this patent
Use dynamometer machine, but be only used for simulating vehicle, it is impossible to real vehicles is carried out effective measurement of operation conditions parameter, it is impossible to whole
Car is surveyed；Patent 201410384563.5 calculates braking moment according to brake pedal displacement signal, although brake pedal
There is certain relation in displacement and braking moment, but due to the brake pedal height adjustable of each vehicle, and different brands model
Vehicle both relations are the most identical, so to demarcate each vehicle.
Chassis dynamometer is widely used to the Measuring error of vehicle at present, but chassis dynamometer can not reflect car completely
Brake force, be also not applied to the indirect measurement of these parameters, how to utilize chassis dynamometer indirectly to record parameter and calculate
Go out vehicle braking force, thus accurately obtain vehicle actual operating state parameter, to be prevented effectively from the brake force car caused the most up to standard
Security incident occurs, and the technology of this respect does not has developmental research so far.
Summary of the invention
For solve above-mentioned present in problem and defect, the invention provides a kind of running state of the vehicle parameter and indirectly measure
Device and scaling method, improve convenience and the reliability of running state of the vehicle parameter measurement, it is achieved brake force is measured indirectly.
The object of the invention, can be realized by following technical measures: a kind of running state of the vehicle parameter measures dress indirectly
Put, including:
For the chassis dynamometer contacted with tested wheel of vehicle, rear defence fender pile, back pull sensor, rear defence fender pile is solid
Being scheduled on rear side of chassis dynamometer, back pull sensor is connected between the rear end of rear defence fender pile and tested vehicle through hawser；
When braking 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 transducerVF, draw Result of Indirect Measurement brake force F of running state of the vehicle parameterS。
Described fender pile is provided with cable hole, it is simple to the tractive of pulling force sensor is fixed.
Described pulling force sensor includes that pulling force transmitting portions, force-sensing parts and segment signal output, force-sensing parts both sides set
Having pulling force transmitting portions, pulling force transmitting portions to be equipped with hawser connecting hole, the output end of force-sensing parts connects signal output unit
Point, segment signal output is shielded cable output, connects for outer signals line.
A kind of scaling method of running state of the vehicle parameter indirect measurement system, including:
A by storing cycle on vehicle chassis dynamometer rotary drum；And by hawser by back pull sensor, tested vechicle
, fender pile connect tension；
Hydrostatic sensor is accessed the hydraulic braking force surveying reality in tested vehicle wheel cylinder oil pipe by B；
C starts vehicle and accelerates to 70km/h；
D brake pedal is to half；
E measures knot indirectly by what vehicle chassis dynamometer and pulling force sensor data calculated running state of the vehicle parameter
Really.
Result of Indirect Measurement is contrasted by F with wheel cylinder oil pressure；
G demarcates indirectly measuring according to comparing result.
The technical scheme that the present invention provides provides the benefit that:
The present invention is suitable for the demarcation using chassis dynamometer indirectly to measure vehicle braking force, and makes Result of Indirect Measurement more
Accurately；Guarantee can record parameter by chassis dynamometer and obtain vehicle braking force, can guarantee that again simultaneously indirect certainty of measurement with
Directly certainty of measurement is close, is greatly improved convenience, effectiveness that vehicle braking force is measured.
Accompanying drawing explanation
Fig. 1 is running state of the vehicle parameter indirect measurement system total arrangement schematic diagram；
Fig. 2 is single cylinder road simulation dynamometer structural representation；
Fig. 3 fender pile structural representation；
Fig. 4 pulling force sensor structural representation；
Fig. 5 running state of the vehicle parameter indirect measurement system demarcates flow chart.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail:
Seeing Fig. 1, the present embodiment running state of the vehicle parameter indirect measurement system, including chassis dynamometer 101, rear protecting
Stake 102, back pull sensor 103, chassis dynamometer 101 is for contacting with tested wheel of vehicle, and rear defence fender pile 102 is fixed on
On ground on rear side of chassis dynamometer；Back pull sensor 103 is connected to the rear end of rear defence fender pile 102 and tested vehicle through hawser
Between；Fender pile is connected with pulling force sensor by hawser, is used for avoiding vehicle derailing rotary drum.
Such as Fig. 2, above-mentioned two fender pile all has and is made up of foundation bolt 301, main body 302, cable hole 303, described 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, it is simple to hawser connects fixing；
Such as Fig. 3, above-mentioned two pulling force sensor can use Shanghai Di Jia to sense the S type pressure sensing of Science and Technology Ltd.
Device DJSX-50, including pulling force transmitting portions 401, force-sensing parts 402 and segment signal output 403, force-sensing parts 402 both sides set
Putting pulling force transmitting portions, pulling force transmitting portions is equipped with hawser connecting hole, and the output end of force-sensing parts connects signal output unit
Dividing 403, segment signal output is shielded cable output, connects for outer signals line.
Such as Fig. 4, the existing chassis dynamometer 101 selected in the present embodiment is by pressure transducer 201, lever 202, change speed gear box
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 transducer 201 is connected with electric eddy current dynamometer 207 by lever 202, rotary drum 204 and
Tested vehicle tire contacts, and above-mentioned rotary drum uses single-cylinder type.
Such as the demarcation flow chart that Fig. 5 is above-mentioned running state of the vehicle parameter indirect measurement system, concrete enforcement step is such as
Under:
Step 501, by running car to be measured to the rotary drum 204 of dynamometer machine 101, makes the front-wheel contact of automobile to be measured turn
On drum 204；
Automobile rear is connected with the pulling force transmitting portions 401 of pulling force sensor 103 by step 502 respectively with hawser；
Back pull sensor 103 is connected with fender pile by step 503 by hawser, and makes hawser tighten as possible, makes pulling force
Sensor reaches 300N, and now vehicle is the most static, and the pulling force reading now existed needs to be processed by subsequent compensation calculating；
The segment signal output 403 of pulling force sensor 103 is connected to harvester by step 504；
Step 505 hydrostatic sensor accesses in automobile wheel cylinder oil pipe to be measured, for surveying the hydraulic braking force of reality, i.e. and oil
Pressure
Step 506 starts vehicle and is accelerated forwardly to 70km/h, brake pedal to half, keeps；
Step 507 obtains the test data of now vehicle chassis dynamometer and pulling force sensor, including, rotary drum pressure
FTLWith back pull sensor reading FVF, lever length LT, rotary drum radius RT, radius of wheel RV, vehicle drive shaft radius DVF?
Record in advance.Parameter according to above-mentioned acquisition calculates Result of Indirect Measurement brake force F of running state of the vehicle parameterS, braking
Power FSFor the amount of real-time change, its reckoning process is as follows:
The most known rotary drum pressure FTL, back pull sensor reading FVF, lever 202 length LT, rotary drum radius RT, wheel half
Footpath RVWith vehicle drive shaft radius DVF, seek brake force FS, i.e. have Wherein wheel torque TV=-LTFTLRV/RT, R in formulaT、LT、RV、DVFConstant then can be regarded as once measuring,
Thus have FS=FS(FTL,FVF), i.e. FSCan be by FTL,FVFTwo variablees are obtained.Due to wheel cylinder oil pressure be just applied on brake block
Pressure is directly proportional, and on brake block, normal pressure is directly proportional to frictional force, so brake force FSLinear relationship is there is with oil pressure；
2. set and indirectly measure oil pressure FS', due to brake force F of above-mentioned calculating gainedSLinear relationship is there is, i.e. brake force with oil pressure
FSWith measurement oil pressure F indirectlyS' there is linear relationship, the most indirectly measure oil pressure
Wherein a represents Monomial coefficient, i.e. slope, and b represents constant term, utilizes method of least square to obtain in linear regression fit equationIt is respectively the estimated value of a, b, then has Estimate for indirectly measuring oil pressure
Calculation value.
Step 508 will measure oil pressure estimated value indirectlyWith the oil pressure directly recorded at step 505 wheel cylinderEnter
Row contrast, both are " time pressure " curve, according to comparing result to indirectly measuring brake force FSDemarcate.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (6)
1. a running state of the vehicle parameter indirect measurement system, it is characterised in that including:
For the chassis dynamometer contacted with tested wheel of vehicle, rear defence fender pile, back pull sensor, rear defence fender pile is fixed on
On rear side of chassis dynamometer；Back pull sensor is connected between the rear end of rear defence fender pile and tested vehicle through hawser；
When braking 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 back pull sensorVF,
Go out Result of Indirect Measurement brake force F of running state of the vehicle parameterS。
A kind of running state of the vehicle parameter indirect measurement system the most according to claim 1, it is characterised in that: described protection
Stake is provided with is easy to the cable hole that pulling force sensor tractive is fixing.
A kind of running state of the vehicle parameter indirect measurement system the most according to claim 1 and 2, it is characterised in that: described
Pulling force sensor includes that pulling force transmitting portions, force-sensing parts and segment signal output, force-sensing parts both sides are provided with pulling force transfer part
Point, pulling force transmitting portions is equipped with hawser connecting hole, and the output end of force-sensing parts connects segment signal output, signal output unit
It is divided into shielded cable to export, connects for outer signals line.
4. the scaling method of a running state of the vehicle parameter indirect measurement system, it is characterised in that including:
A by storing cycle on vehicle chassis dynamometer rotary drum；And by hawser by back pull sensor, tested vehicle, anti-
Fender pile connects tension；
Hydrostatic sensor is accessed the hydraulic braking force surveying reality in tested vehicle wheel cylinder oil pipe by B；
C starts vehicle and accelerates to 70km/h；
D brake pedal is to half；
E, by obtaining vehicle chassis dynamometer and the test data of pulling force sensor, calculates between running state of the vehicle parameter
Connect measurement result brake force.
Result of Indirect Measurement brake force is contrasted by F with step B wheel cylinder oil pressure；
Measurement brake force indirectly is demarcated by G according to comparing result.
The scaling method of a kind of running state of the vehicle parameter indirect measurement system the most according to claim 4, its feature exists
In: the test data obtaining chassis dynamometer and pulling force sensor include: the rotary drum pressure F on chassis dynamometerTL, lever length
LT, rotary drum radius RT, obtain vehicle parameter and include radius of wheel RV, vehicle drive shaft radius DVF, obtain the reading of back pull sensor
Number FVF。
The scaling method of a kind of running state of the vehicle parameter indirect measurement system the most according to claim 4, its feature exists
In: the reading produced on pulling force sensor in step A carries out subsequent compensation process.
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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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| 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106771746A (en) * | 2016-12-20 | 2017-05-31 | 中国电器科学研究院有限公司 | A kind of electric automobile dynamic operation condition electromagnetic disturbance fast appraisement method |
| CN107703747A (en) * | 2017-10-09 | 2018-02-16 | 东南大学 | A kind of heavy-load robot kinetic parameter self-calibrating method towards agitating friction weldering application |
| CN108152050A (en) * | 2017-12-22 | 2018-06-12 | 南京越博动力系统股份有限公司 | A kind of whole-car parameters calibration method |
| CN112629738A (en) * | 2020-12-18 | 2021-04-09 | 舜泰汽车有限公司 | Unmanned vehicle braking force calibration system |
| CN113916442A (en) * | 2021-10-14 | 2022-01-11 | 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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| CN102195464A (en) * | 2010-03-16 | 2011-09-21 | 刘非 | Power factor correction circuit and control method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771746A (en) * | 2016-12-20 | 2017-05-31 | 中国电器科学研究院有限公司 | A kind of electric automobile dynamic operation condition electromagnetic disturbance fast appraisement method |
| 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 |
| CN107703747A (en) * | 2017-10-09 | 2018-02-16 | 东南大学 | A kind of heavy-load robot kinetic parameter self-calibrating method towards agitating friction weldering application |
| CN108152050A (en) * | 2017-12-22 | 2018-06-12 | 南京越博动力系统股份有限公司 | A kind of whole-car parameters calibration method |
| CN112629738A (en) * | 2020-12-18 | 2021-04-09 | 舜泰汽车有限公司 | Unmanned vehicle braking force calibration system |
| CN113916442A (en) * | 2021-10-14 | 2022-01-11 | 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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| CN106052934B (en) | 2019-02-05 |
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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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