CN101285727A - Elementary inertia meter - Google Patents
Elementary inertia meter Download PDFInfo
- Publication number
- CN101285727A CN101285727A CNA2008100618776A CN200810061877A CN101285727A CN 101285727 A CN101285727 A CN 101285727A CN A2008100618776 A CNA2008100618776 A CN A2008100618776A CN 200810061877 A CN200810061877 A CN 200810061877A CN 101285727 A CN101285727 A CN 101285727A
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- speed
- chassis dynamometer
- control box
- constant force
- inertia
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Abstract
The invention provides a fundamental inertia tester, comprising an IGBT control casing, a speed sensor assembly and a computer, wherein, the IGBT control casing comprises a microprocessor and a high power field effect transistor, and is electrically connected with the speed sensor assembly, the computer, a force sensor on a chassis dynamometer and an electric eddy current machine; the IGBT achieves constant force control to the electric eddy current machine, measures signals transmitted from the speed sensor assembly and the force sensor through twice load coast-down of constant forces F1 and F2 respectively, and measures the speed of a roller and a medium value of actual measured resistances; and a computer program measures and controls the whole measurement process and calculates the measurement result according to the computing formula of the fundamental inertia. The fundamental inertia tester has the advantages of accurate measurement, good repetitiveness, easy operation, capability of measuring the automobile chassis dynamometer in using field and convenient portability.
Description
Technical field
The present invention relates to a kind of elementary inertia measurement mechanism, relate in particular to a kind of road simulation dynamometer stage body elementary inertia meter.
Background technology
According to national environmental protection industry HJ/T290-2006, HJ/T291-2006, HJ/T292-2006 and HJ/T396-2007 standard, be used for the road simulation dynamometer that the operating condition method exhaust contaminant is measured, its elementary inertia all will be measured, its elementary inertia should be within setting ± 2% scope, with nominal value phase tolerace 1%.The HJ/T396-2007 regulation is measured by following method:
1, the abundant preheating of chassis dynamometer does not load chassis dynamometer, detects the coasting time t1 (s) of the 48～32km/h of chassis dynamometer when the normal configuration state.
2, remove the mechanical flywheel of chassis dynamometer after, the abundant preheating of chassis dynamometer does not load chassis dynamometer, detects the coasting time t2 (s) of 48～32km/h of chassis dynamometer when removing mechanical flywheel.
3, the DIW of calculating machine flywheel
Fly
4, calculate chassis dynamometer elementary inertia DIW
In the formula:
DIW---chassis dynamometer elementary inertia (kg).
DIW
Fly---the equivalent car mass (kg) of mechanical flywheel moment of inertia.
T1---the actual measurement coasting time (s) of 48～32km/h during chassis dynamometer normal configuration state.
T2---remove the actual measurement coasting time (s) of flywheel rear chassis dynamometer machine 48～32km/h.
There is following shortcoming in said method:
1, because of behind the increase and decrease flywheel, stage body change in resistance behind windage that flywheel rotates and the increase and decrease flywheel causes the hypothesis of this elementary inertia computing formula to be difficult to set up, and the accuracy of its measurement result data and repeatability are relatively poor, can not satisfy the requirement of correlation technique index.
2, detect elementary inertia and will increase and decrease mass flywheel, this is to realize at equipment use scene.
3, want the equivalent car mass of calculating machine Rotary Inertia of Flywheel, the practical operation difficulty is big.
Summary of the invention
Technical matters to be solved by this invention overcomes the deficiencies in the prior art exactly, provides a kind of measurement data accurately and the elementary inertia meter of good reproducibility.
The technical solution adopted in the present invention is: elementary inertia meter, comprise the IGBT control box, speed pickup assembly and computer, the IGBT control box comprises microprocessor and high-power FET, IGBT control box and speed pickup assembly, computer, force transducer on the chassis dynamometer and current vortex are dynamo-electric to be connected, the IGBT control box is realized constant force control to the current vortex machine, by twice constant force F1, F2 loads and slides, the signal that transmits of measuring speed sensor unit and force transducer respectively, measure the mean value of drum rotation speed and actual measurement resistance, the whole measuring process of computer program observing and controlling, and the computing formula calculating measurement result of pressing elementary inertia.
Beneficial technical effects of the present invention is: at first, slide because the present invention adopts twice constant force to load, the power controlling value with in the mean value replacement classical formulas of actual measurement resistance has the advantage of measurement accuracy and good reproducibility.Secondly, when the present invention measures moment of inertia, needn't the configuration standard flywheel, needn't the dismounting flywheel, alleviated labour intensity greatly, have simple to operate, can be to the advantage of using on-the-spot road simulation dynamometer to measure.The 3rd, because volume of the present invention is less, in light weight, have portable advantage.
Description of drawings
Fig. 1: be principle of work block scheme of the present invention;
Fig. 2: be the structural representation of speed pickup assembly;
Fig. 3: be the vertical view of Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
As shown in Figure 1, elementary inertia meter, comprise the IGBT control box, speed pickup assembly and computer, the IGBT control box comprises microprocessor and high-power FET, IGBT control box and speed pickup assembly, computer, force transducer on the chassis dynamometer and current vortex are dynamo-electric to be connected, the IGBT control box is realized constant force control to the current vortex machine, by twice constant force F1, F2 loads and slides, constant force F1, F2 is equivalent cylinder surface resistance for the current vortex machine loads, the signal that transmits of measuring speed sensor unit and force transducer respectively, measure the mean value of drum rotation speed and actual measurement resistance, the whole measuring process of computer program observing and controlling, and the computing formula calculating measurement result of pressing elementary inertia.The frequency converter that the IGBT control box is provided with control motor on point driving switch and the chassis dynamometer is electrically connected, controls the start-stop of motor, convenient detection.In the present embodiment, for the ease of carrying, adopt notebook computer, notebook computer is connected with the IGBT control box by RS-232 serial communication mouth, and the operating voltage of force transducer is 12V, elementary inertia meter connect two-phase AC220V power supply.Adopt 60A high-power FET control circuit, force sensor signals adopts 16 A/D converter collections, slewing rate 5 microseconds.The speed pickup assembly adopts 600 pulse angle-position encoders.The turbine electric current adopts IGBT pulse-width regulated, regulating frequency 800Hz.
The computing formula of elementary inertia is: DIW=(F1-F2)/(Δ V
1/ Δ t
1-Δ V
2/ Δ t
2) (kg), F1 and F2 are respectively under constant force F1, the F2 situation, slide the mean value (N) of interval actual measurement resistance in speed; Δ t
1With Δ t
2For being respectively under constant force F1, the F2 situation, slide interval coasting time (s) in speed; Δ V
1, Δ V
2Be respectively under constant force F1, the F2 situation, slide the interval initial sliding speed of physical record and stop sliding speed poor (m/s) in speed.Below be a practical measuring examples:
According to the requirement of equipment specification manual,, carry out according to the following steps then chassis dynamometer or the abundant preheating of tested equipment:
1, head roll speed is carried out constant force F to 56km/h in (48～16) km/h speed interval section
1Slide test during=1170N, last station machine record coasting time Δ t
1(s) and the mean value F1 (N) of actual measurement resistance, survey initial and termination sliding speed difference Δ V
1
2, head roll speed is carried out constant force F to 56km/h in (48～16) km/h speed interval section
1Slide test during=0N, last station machine record coasting time Δ t
2(s) and the mean value F2 (N) of actual measurement resistance, survey initial and termination sliding speed difference Δ V
2
3, host computer is tried to achieve DIW by computing formula
DIW＝(F1-F2)/(ΔV
1/Δt
1-ΔV
2/Δt
2)
4, repeat twice above-mentioned measurement again, ask three DIW measurement result mean values as final measurement.
Shown in Fig. 2 and 3, the speed pickup assembly comprises angle-position encoder 1, roller 2 and bracket assembly, bracket assembly comprises swing arm 3, bearing pin 4, spring 5, L type crossbeam 6 and Magnetic gauge stand 7, angle-position encoder 1 and roller 2 be coaxial to be arranged on the end of swing arm 3, swing arm 3 is arranged on the L type crossbeam 6 rotationally by bearing pin 4, the other end of swing arm 3 is connected with L type crossbeam 6 by spring 5, cylinder 9 Elastic Contact on roller 2 and the chassis dynamometer, L type crossbeam 6 is fixedlyed connected with Magnetic gauge stand 7, and Magnetic gauge stand 7 is fixed on the frame 8.Because of cylinder 9 Elastic Contact on roller 2 and the chassis dynamometer, the cylinder that this speed pickup assembly can adapt to any format diameter carries out velocity survey.
Claims (5)
1, elementary inertia meter, it is characterized in that: comprise the IGBT control box, speed pickup assembly and computer, the IGBT control box comprises microprocessor and high-power FET, IGBT control box and speed pickup assembly, computer, force transducer on the chassis dynamometer and current vortex are dynamo-electric to be connected, the IGBT control box is realized constant force control to the current vortex machine, by twice constant force F1, F2 loads and slides, the signal that transmits of measuring speed sensor unit and force transducer respectively, measure the mean value of drum rotation speed and actual measurement resistance, the whole measuring process of computer program observing and controlling, and the computing formula calculating measurement result of pressing elementary inertia.
2, elementary inertia meter according to claim 1 is characterized in that: the computing formula of elementary inertia is: DIW=(F1-F2)/(Δ V
1/ Δ t
1-Δ V
2/ Δ t
2) (kg), F1 and F2 are respectively under constant force F1, the F2 situation, slide the mean value (N) of interval actual measurement resistance in speed; Δ t
1With Δ t
2Be respectively under constant force F1, the F2 situation, slide interval coasting time (s) in speed; Δ V
1With Δ V
2Be respectively under constant force F1, the F2 situation, slide the interval initial sliding speed of physical record and stop sliding speed poor (m/s) in speed.
3, elementary inertia meter according to claim 1 and 2, it is characterized in that: the speed pickup assembly comprises angle-position encoder, roller and bracket assembly, bracket assembly comprises swing arm, bearing pin, spring, L type crossbeam and Magnetic gauge stand, angle-position encoder and roller be coaxial to be arranged on the end of swing arm, swing arm is arranged on the L type crossbeam rotationally by bearing pin, the other end of swing arm is connected with L type crossbeam by spring, cylinder Elastic Contact on roller and the chassis dynamometer, L type crossbeam is fixedlyed connected with Magnetic gauge stand, and Magnetic gauge stand is fixed on the frame.
4, elementary inertia meter according to claim 1 and 2 is characterized in that: the frequency converter that the IGBT control box is provided with control motor on point driving switch and the chassis dynamometer is electrically connected, controls the start-stop of motor.
5, elementary inertia meter according to claim 3 is characterized in that: the frequency converter that the IGBT control box is provided with control motor on point driving switch and the chassis dynamometer is electrically connected, controls the start-stop of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061877A CN100575899C (en) | 2008-05-29 | 2008-05-29 | Elementary inertia meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810061877A CN100575899C (en) | 2008-05-29 | 2008-05-29 | Elementary inertia meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101285727A true CN101285727A (en) | 2008-10-15 |
| CN100575899C CN100575899C (en) | 2009-12-30 |
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ID=40058044
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810061877A Expired - Fee Related CN100575899C (en) | 2008-05-29 | 2008-05-29 | Elementary inertia meter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858814A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for measuring parasitic frictional resistance of electric dynamometer of chassis in gliding way |
| CN101858813A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for base inertia of chassis electric dynamometer |
| CN102451949A (en) * | 2010-10-29 | 2012-05-16 | 成都焊研科技有限责任公司 | Narrow-lap seam welding machine for ultra-thin plates |
| CN106461506A (en) * | 2014-06-02 | 2017-02-22 | 株式会社明电舍 | Control device for chassis dynamometer |
| CN113281061A (en) * | 2021-05-23 | 2021-08-20 | 朱卫萍 | Method for verifying loading force of automobile under steady-state working condition detection |
| CN114553091A (en) * | 2022-02-25 | 2022-05-27 | 哈尔滨工业大学 | Identification method of constant force contact system |
-
2008
- 2008-05-29 CN CN200810061877A patent/CN100575899C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858814A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for measuring parasitic frictional resistance of electric dynamometer of chassis in gliding way |
| CN101858813A (en) * | 2010-06-11 | 2010-10-13 | 中国汽车技术研究中心 | Calibration method for base inertia of chassis electric dynamometer |
| CN102451949A (en) * | 2010-10-29 | 2012-05-16 | 成都焊研科技有限责任公司 | Narrow-lap seam welding machine for ultra-thin plates |
| CN106461506A (en) * | 2014-06-02 | 2017-02-22 | 株式会社明电舍 | Control device for chassis dynamometer |
| CN106461506B (en) * | 2014-06-02 | 2019-01-25 | 株式会社明电舍 | Control device for chassis dynamometer |
| CN113281061A (en) * | 2021-05-23 | 2021-08-20 | 朱卫萍 | Method for verifying loading force of automobile under steady-state working condition detection |
| CN113281061B (en) * | 2021-05-23 | 2023-06-27 | 朱卫萍 | Verification method for detecting loading force of automobile under steady-state working condition |
| CN114553091A (en) * | 2022-02-25 | 2022-05-27 | 哈尔滨工业大学 | Identification method of constant force contact system |
| CN114553091B (en) * | 2022-02-25 | 2024-09-13 | 哈尔滨工业大学 | Identification method of constant force contact system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100575899C (en) | 2009-12-30 |
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|---|---|---|---|
| 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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhejiang Jiangxing Automobile Inspection Equipment Co., Ltd. Assignor: Zhou Shensheng Contract fulfillment period: 2010.1.5 to 2015.1.4 contract change Contract record no.: 2010330000133 Denomination of invention: Elementary inertia meter Granted publication date: 20091230 License type: Exclusive license Record date: 2010.1.29 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2010.1.5 TO 2015.1.4; CHANGE OF CONTRACT Name of requester: ZHEJIANG JIANGXING AUTOMOBILE TESTING EQUIPMENT CO Effective date: 20100129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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