CN104266749B - A kind of alternator for vehicle NVH off-line test devices and methods therefors - Google Patents

A kind of alternator for vehicle NVH off-line test devices and methods therefors Download PDF

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Publication number
CN104266749B
CN104266749B CN201410576755.6A CN201410576755A CN104266749B CN 104266749 B CN104266749 B CN 104266749B CN 201410576755 A CN201410576755 A CN 201410576755A CN 104266749 B CN104266749 B CN 104266749B
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China
Prior art keywords
sound
generator
belt
alternator
sound insulation
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Expired - Fee Related
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CN201410576755.6A
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Chinese (zh)
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CN104266749A (en
Inventor
易鹏
余勇
李雷霆
李文礼
邵雅雯
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Chongqing Academy of Science and Technology
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Chongqing Academy of Science and Technology
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Abstract

The invention discloses a kind of alternator for vehicle NVH off-line test devices, it is characterised in that including sound insulation bin, monitor station, the drive end in sound proof box, belt tensioning mechanism and acoustics acquisition analysis system.The invention also discloses a kind of alternator for vehicle NVH off-line test methods, the process employs said apparatus, generator to be detected is placed in a closed sound insulation bin, generator simulation work to be detected is driven to operate by the drive end in sound proof box again, generator operation voice signal is gathered using sound pressure sensor, earphone is transferred signals to again and is converted into sound by operator's sense of hearing judgement detection, and/or transfers signals to middle control computer carries out contrast judgement detection.Therefore the present invention has apparatus structure simply compact, fabrication and installation are convenient, flexibly adjustable, and method test dynamic is good, and test data true and accurate, precision are high, good reliability, the advantages of cost is relatively low.

Description

A kind of alternator for vehicle NVH off-line test devices and methods therefors
Technical field
The present invention relates to a kind of method of alternator for vehicle NVH off-line tests and corresponding detection means.
Background technology
NVH is noise, vibration and sound vibration roughness(Noise、Vibration、Harshness)English abbreviation.This is Global question of automobile making quality is weighed, it is experienced as most directly and most surface to user vehicle.Vehicle NVH problems are the major vehicle manufacturing enterprises of international automobile industry and one of the problem of parts enterprises are paid close attention to.There is statistics to show, The failure problems that vehicle there are about 1/3 are that have relation with the NVH problems of vehicle, and there is nearly 20% R & D Cost consumption in each major company On the NVH for solving the problems, such as vehicle.
In auto NVH, it is that generator is caused to have significant portion, when automobile is in startup, idling or halted state, Cheng Yuanneng Clearly hear that alternating current generator sends a kind of at a relatively high, the especially ear-piercing cry of hissing of frequency.Therefore NVH is carried out to automobile current generator Research, in favor of eliminating auto NVH, just seems necessary.
Each generator enterprise rests on laboratory's stage to generator NVH researchs, and what client feedback was returned has NVH problems Generator measure analysis in laboratory, finding out the small lot model machine produced after the problem of causing NVH, rectification does not have NVH quality problems, but produce product out in enormous quantities and still there are NVH quality problems, main reason is that electric generating In machine batch production process, because part quality is difficult to accurate control, assembling quality can not accurate control, cause what is produced in batches Alternator for vehicle quality is difficult to overall control, therefore, is necessary to alternator for vehicle NVH off-line tests.
At present, alternator for vehicle NVH off-line tests are directed in the prior art both at home and abroad, one kind is to be arranged on generator On vehicle, hang neutral, closed door and vehicle window, listening judges the quality of generator, another method to driver in the car It is to drive generator to rotate using drive device, vibrating sensor is arranged on generator housing, is judged by vibration signal The NVH quality of generator.The first method degree of accuracy is not high, and experiment time is long;Second method judges by vibrating, The interference that drive end vibration signal vibrates in itself to generator can not be excluded, laboratory technician can not also be sent out by vibration values subjective assessment The quality of motor sound.
Therefore a kind of new detection technique how is designed, and allow its direct, rapidly measure alternator for vehicle noise figure, can With subjective assessment engine NVH quality, it objective can also judge whether noise figure reaches requirement of dispatching from the factory, as there is considered solution The problem of.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are:How to provide one kind can be straight Connect, rapidly measure alternator for vehicle noise figure, can be with subjective assessment engine NVH quality, can also objective judgement engine Whether NVH reaches the alternator for vehicle NVH off-line test devices and methods therefors for requirement of dispatching from the factory;Make it have test data truly accurate Really, precision is high;The structure of the detecting device form of use is simple, flexibly adjustable, and test performance is good, the features such as cost is relatively low.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme:
A kind of alternator for vehicle NVH off-line test devices, it is characterised in that including
Sound insulation bin, sound insulation bin is to be provided with sound insulation in box typed structure and the interference for completely cutting off external voice, sound insulation bin Door;
Monitor station, the monitor station is located in sound insulation bin, and monitor station upper surface is provided with for installing generating to be detected The mounting seat of machine;
Drive end, the drive end includes a sound proof box being located at below monitor station, and one is provided with sound proof box and is moved Force servo motor(It is preferred to use the water cooling servomotor of low noise), kinetic servo motor output shaft and a power transmission shaft pass through connection Axle device(Preferred rubber shaft coupling)Level is connected, and power transmission shaft is horizontally arranged on a bearing block, and power transmission shaft one end is rotatable Extend sound proof box and belt pulley is fixed with outside sound proof box in ground;Belt pulley and it is installed on the generator to be detected after mounting seat Output wheel is oppositely arranged and left on monitor station for installing driving belt in space between the two;
Belt tensioning mechanism, the belt tensioning mechanism is located at belt pulley and is installed on the generator to be detected after mounting seat Output wheel between and for realizing the tensioning of driving belt;
Acoustics acquisition analysis system, the acoustics acquisition analysis system includes being located at the acoustic pressure in sound insulation bin around generator Sensor, sound pressure sensor is connected with data collecting card, earphone of the data collecting card by data wire and outside sound insulation bin And/or middle control computer is connected.
The invention also discloses a kind of alternator for vehicle NVH off-line test methods, even if with above-mentioned detection device, will be to be checked Survey generator to be placed in a closed sound insulation bin, then drive generator to be detected to simulate work by the drive end in sound proof box Operate, using sound pressure sensor gather generator operation voice signal, then transfer signals to earphone be converted into sound by grasp Author's sense of hearing judgement detection, and/or transfer signals to middle control computer progress contrast judgement detection.
So, generator NVH quality is judged according to the mode of detection sound in the present invention, it is then outer using sound insulation bin shielding Sound interference is connect, using sound proof box shield guard motor sound interference, this makes it possible to direct, alternator for vehicle is rapidly measured Noise figure so that testing result is very reliable, can more accurately reflect the fine or not degree of generator NVH.Can also be objective Judge whether noise figure reaches requirement of dispatching from the factory;It has test data true and accurate, precision high;The structure of the detecting device shape of use Formula is simple, flexibly adjustable, and test performance is good, the features such as cost is relatively low.
As the optimization of such scheme, in the detection means of use, the housing of the sound insulation bin and sound proof box is hollow Structure, it uses cold-reduced sheet as surface of shell material, is provided with one layer of perforated plate in housing hollow, perforated plate and cold-reduced sheet it Between space in be filled with the porous cotton of melamine fat.So, three-decker formation resonant cavity sound absorption structure, can be played Great sound-adsorbing sound-insulating hung effect, preferably avoids the interference of external sound and motor sound to detection.Ensure detection knot The accuracy of fruit.
As optimization, in the detection means of use, the belt tensioning mechanism, including belt tension motor and tensioning wheel, Tensioning wheel is arranged in tension wheel shaft bearing, and tension wheel shaft bearing is slidably disposed on a level and is fixed on below monitor station Guide rail on, and tension wheel shaft bearing and one with guide rail parallel set rack be connected, the belt tension motor output shaft On gear is installed, gear and rack engage and pinion rotation can be converted into rack translation.
So, with simple in construction, it is tensioned reliable advantage.It is convenient to install after belt, then by the strainer by belt Tensioning, it is ensured that reliable transmission, detection is accurate.
As optimization, in the detection means of use, the sound pressure sensor be two and one be transversely arranged at it is to be checked Survey at generator side 300mm, another is vertically arranged at engine head 300mm to be detected.So, two are provided with The sound pressure sensor of different directions, can facilitate and be compared to each other to carry out, to mark, preferably protecting in sound signal collecting Demonstrate,prove the reliability of detection.
The alternator for vehicle NVH off-line test methods of the present invention, specifically include following steps:
A, the detection means for obtaining such as above-mentioned structure;
B, opening soundproof door, generator to be detected is installed in sound insulation bin in the mounting seat on monitor station, then will transmission Belt sleeve is set between the output wheel of belt pulley and generator to be detected, is started belt tensioning mechanism and is realized belt tension;
Soundproof door is closed after c, the motor work of startup kinetic servo, servomotor passes through power transmission shaft and belt drive generator Operating, gathers generator operation voice signal by sound pressure sensor, then transfers signals to earphone and be converted into sound by operator Sense of hearing judgement detection, and/or transfer signals to middle control computer progress contrast judgement detection.
So, generator can be arranged in sound insulation environment by the present invention, in the case where not disturbed by outside noise both Whether can be reached by the objective noise for judging generator of data analysis system again with subjective assessment generator noise quality Dispatch from the factory requirement.Therefore the present invention has apparatus structure simply compact, fabrication and installation are convenient, flexibly adjustable, and method test dynamic is good, Test data true and accurate, precision are high, good reliability, the advantages of cost is relatively low.
Brief description of the drawings
The structure schematic diagram of the detection means used when Fig. 1 is present invention specific implementation.
Fig. 2 is the structural representation after independent sound insulation bin opening in Fig. 1.
Fig. 3 is Fig. 2 sectional view.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As Figure 1-3, a kind of alternator for vehicle NVH off-line test devices, including
Sound insulation bin 1, sound insulation bin be box typed structure and for completely cut off in the interference of external voice, sound insulation bin 1 be provided with every Sound door 2;
Monitor station 3, the monitor station 3 is located in sound insulation bin 1, and the upper surface of monitor station 3 is provided with for installing to be detected The mounting seat 5 of generator 4;
Drive end, the drive end includes being provided with one in a sound proof box 6 being located at below monitor station, sound proof box 6 Kinetic servo motor 7(It is preferred to use the water cooling servomotor of low noise), the output shaft of kinetic servo motor 7 and a power transmission shaft lead to Cross shaft coupling 8(Preferred rubber shaft coupling)Level is connected, and power transmission shaft is horizontally arranged on a bearing block 9, and power transmission shaft one end Rotationally extend sound proof box 6 and belt pulley 10 is fixed with outside sound proof box 6;Belt pulley 10 and it is installed on treating after mounting seat The output wheel of detection generator is oppositely arranged and left on monitor station 3 for installing driving belt in space between the two;
Belt tensioning mechanism 11, the belt tensioning mechanism 11 is located at belt pulley 10 and is installed on to be detected after mounting seat Between the output wheel of generator 4 and for realizing the tensioning of driving belt;
Acoustics acquisition analysis system, the acoustics acquisition analysis system includes being located at the acoustic pressure in sound insulation bin around generator Sensor 12, sound pressure sensor and data collecting card(Do not show)It is connected, data collecting card is by data wire and positioned at sound insulation bin Outside earphone(Do not show)And/or middle control computer 13 is connected.
Wherein, the housing of the sound insulation bin 1 and sound proof box 6, is hollow structure, and it uses cold-reduced sheet as surface of shell It is provided with material, housing hollow in one layer of perforated plate, the space between perforated plate and cold-reduced sheet and has been filled with melamine The porous cotton of fat.So, three-decker formation resonant cavity sound absorption structure, can play great sound-adsorbing sound-insulating hung effect, preferably keep away Exempt from the interference of external sound and motor sound to detection.
Wherein, the belt tensioning mechanism 11, including belt tension motor and tensioning wheel, tensioning wheel is arranged on tension wheel shaft In bearing, tension wheel shaft bearing is slidably disposed on a level and is fixed on the guide rail below monitor station, and tension wheel shaft Bearing and a rack set with guide rail parallel are connected, and are provided with gear on the belt tension motor output shaft, gear and Rack engages and pinion rotation can be converted into rack translation.
Wherein, the sound pressure sensor 12 is transversely arranged at the side 300mm of generator 4 to be detected for two and one Place, another is vertically arranged at the top 300mm of engine 4 to be detected.
Invention additionally discloses a kind of alternator for vehicle NVH off-line test methods, following steps are specifically included:
A, the detection means for obtaining such as above-mentioned structure;
B, opening soundproof door, generator to be detected is installed in sound insulation bin in the mounting seat on monitor station, then will transmission Belt sleeve is set between the output wheel of belt pulley and generator to be detected, is started belt tensioning mechanism and is realized belt tension;
Soundproof door is closed after c, the motor work of startup kinetic servo, servomotor passes through power transmission shaft and belt drive generator Operating, gathers generator operation voice signal by sound pressure sensor, then transfers signals to earphone and be converted into sound by operator Sense of hearing judgement detection, and/or transfer signals to middle control computer progress contrast judgement detection.
The present invention can be direct, rapidly measures alternator for vehicle noise figure, can be fine or not with subjective assessment engine NVH, It objective can also judge whether engine NVH reaches requirement of dispatching from the factory;It has the advantages that test data true and accurate, precision are high; The detection means wherein used has structure type simple, flexibly adjustable, and test performance is good, the advantages of cost is relatively low.

Claims (5)

1. a kind of alternator for vehicle NVH off-line test devices, it is characterised in that including
Sound insulation bin, sound insulation bin is to be provided with soundproof door in box typed structure and the interference for completely cutting off external voice, sound insulation bin;
Monitor station, the monitor station is located in sound insulation bin, and monitor station upper surface is provided with for installing generator to be detected Mounting seat;
Drive end, the drive end includes a sound proof box being located at below monitor station, is provided with a power in sound proof box and watches Motor is taken, kinetic servo motor output shaft and a power transmission shaft are connected by shaft coupling level, and power transmission shaft is horizontally arranged at one On bearing block, and power transmission shaft one end rotationally extends sound proof box and belt pulley is fixed with outside sound proof box;Belt pulley and peace Output wheel loaded on the generator to be detected after mounting seat is oppositely arranged and left on monitor station for installing driving belt in two Space between person;
Belt tensioning mechanism, the belt tensioning mechanism is located at belt pulley and is installed on the defeated of the generator to be detected after mounting seat Go out between wheel and be used for the tensioning for realizing driving belt;
Acoustics acquisition analysis system, the acoustics acquisition analysis system includes being located at the acoustic pressure sensing around generator in sound insulation bin Device, sound pressure sensor is connected with data collecting card, earphone of the data collecting card by data wire and outside sound insulation bin and/or Middle control computer is connected.
2. alternator for vehicle NVH off-line test devices as claimed in claim 1, it is characterised in that the sound insulation bin and sound insulation The housing of case, is hollow structure, and it uses cold-reduced sheet as surface of shell material, and one layer of perforation is provided with housing hollow The porous cotton of melamine fat has been filled with plate, the space between perforated plate and cold-reduced sheet;
So, three-decker formation resonant cavity sound absorption structure, can play great sound-adsorbing sound-insulating hung effect, preferably avoid the external world The interference of sound and motor sound to detection.
3. alternator for vehicle NVH off-line test devices as claimed in claim 1, it is characterised in that the belt tensioning mechanism, Including belt tension motor and tensioning wheel, tensioning wheel is arranged in tension wheel shaft bearing, and tension wheel shaft bearing is mounted slidably It is fixed in a level on the guide rail below monitor station, and tension wheel shaft bearing and a rack set with guide rail parallel are connected Connect, gear is installed on the belt tension motor output shaft, gear and rack engage and pinion rotation can be converted into tooth Bar translation.
4. alternator for vehicle NVH off-line test devices as claimed in claim 1, it is characterised in that the sound pressure sensor is Two and one are transversely arranged at generator side 300mm to be detected, and another is vertically arranged at engine to be detected At the 300mm of top.
5. a kind of alternator for vehicle NVH off-line test methods, it is characterised in that specifically include following steps:
The alternator for vehicle NVH off-line test devices of a, acquisition as described in any one of claim 1 to 4 claim;
B, soundproof door is opened, generator to be detected is installed in sound insulation bin in the mounting seat on monitor station, then by driving belt Set is set between the output wheel of belt pulley and generator to be detected, is started belt tensioning mechanism and is realized belt tension;
Soundproof door is closed after c, the motor work of startup kinetic servo, servomotor passes through power transmission shaft and belt drive generator is transported Turn, generator operation voice signal is gathered by sound pressure sensor, then transfer signals to earphone and be converted into sound and listened by operator Feel and judge detection, and/or transfer signals to middle control computer progress contrast and judge detection.
CN201410576755.6A 2014-10-24 2014-10-24 A kind of alternator for vehicle NVH off-line test devices and methods therefors Expired - Fee Related CN104266749B (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104792406A (en) * 2015-04-05 2015-07-22 重庆理工清研凌创测控科技有限公司 NVH offline detecting device for car gearbox
CN104849352B (en) * 2015-05-05 2017-09-29 中国科学院信息工程研究所 A kind of sound insulation property detecting system
CN105208487B (en) * 2015-07-22 2018-09-11 广西汽车集团有限公司 A kind of voice acquisition system
CN105277275B (en) * 2015-11-10 2019-03-19 吉林大学 Automobile tire road rumble is test bed
CN105277370A (en) * 2015-11-25 2016-01-27 山东大学 Engine exhaust noise off-line simulation test table and test method
CN105841797B (en) * 2016-03-15 2019-07-02 中南大学 A kind of Car window electric machine extraordinary noise detection method and device based on MFCC and SVM
CN106404163B (en) * 2016-08-25 2019-04-19 辽宁科技学院 One kind is for testing gearbox gear meshing noise testing stand
CN111624000A (en) * 2020-06-08 2020-09-04 安徽江淮汽车集团股份有限公司 NVH detection equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008261688A (en) * 2007-04-11 2008-10-30 Hitachi Ltd Apparatus and method for separating sound source
CN102183369A (en) * 2011-03-19 2011-09-14 重庆长安汽车股份有限公司 Noise tester of engine belt tightener
CN201983916U (en) * 2010-12-31 2011-09-21 中国科学院沈阳自动化研究所 Vibration analysis test device of automobile speed changer
CN103344323A (en) * 2013-06-09 2013-10-09 浙江大学 Wind turbine generator noise masking method and device based on noise control technique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008261688A (en) * 2007-04-11 2008-10-30 Hitachi Ltd Apparatus and method for separating sound source
CN201983916U (en) * 2010-12-31 2011-09-21 中国科学院沈阳自动化研究所 Vibration analysis test device of automobile speed changer
CN102183369A (en) * 2011-03-19 2011-09-14 重庆长安汽车股份有限公司 Noise tester of engine belt tightener
CN103344323A (en) * 2013-06-09 2013-10-09 浙江大学 Wind turbine generator noise masking method and device based on noise control technique

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