CN103983346B - A kind of noise-measuring system and method - Google Patents
A kind of noise-measuring system and method Download PDFInfo
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- CN103983346B CN103983346B CN201410127290.6A CN201410127290A CN103983346B CN 103983346 B CN103983346 B CN 103983346B CN 201410127290 A CN201410127290 A CN 201410127290A CN 103983346 B CN103983346 B CN 103983346B
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007858 starting material Substances 0.000 claims abstract description 179
- 239000000523 sample Substances 0.000 claims abstract description 49
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 4
- 230000008450 motivation Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 206010019133 Hangover Diseases 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 5
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- 238000012360 testing method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
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Abstract
The invention discloses a kind of noise-measuring system and method, belong to starter technical field.Described device includes fixed structure, first microphone, speed probe and data processor, fixed structure is used for fixing starter, and keep axis and the plane-parallel of starter toothed wheel in starter, first microphone is arranged near starter toothed wheel, first microphone is for measuring the noise that starter sends, speed probe is arranged on starter or arranges near described starter, speed probe is for measuring the speed that starter toothed wheel rotates, first microphone, speed probe all electrically connects with data processor, data processor is for collecting and process the data that the first microphone measures with speed probe.The noise that starter can be sent by the device that the present invention provides carries out independent measurement, makes staff can be analyzed according to the noise that the starter recorded sends, and show that starter produces noise and the reason of hangover sound, and improves starter.
Description
Technical field
The present invention relates to starter technical field, particularly to a kind of noise-measuring system and method.
Background technology
Electromotor is all started by automobile of the prior art by starter.Electric energy is turned by starter
Turn to mechanical energy, drive engine flywheel to rotate the startup realizing electromotor.At starter to engine start
During, owing to there being starter toothed wheel in starter, starter toothed wheel can send some noises in rotation process,
Simultaneously in the moment of engine start, starter, it sometimes appear that the sound that the most significantly trails, has a strong impact on
The sound quality of automobile.
So for ensureing that the sound quality of automobile meets the requirements, being required for this before a automobile produces in a large number
Money automobile carries out noise measurement, but automobile can only carry out in prior art overall measurement, sends out for starter
The noise gone out but cannot be carried out independent measurement.
During realizing the present invention, inventor finds that prior art at least there is problems in that
The noise that cannot send starter due to prior art carries out independent measurement, and measures automobile entirety
Time the noise that obtains the most also include the noise of automobile miscellaneous part so that staff cannot obtain starter
The noise sent, more cannot accurately analyze different starters and produce noise and the reason of hangover sound, thus
Cause staff starter cannot be optimized improvement.
Summary of the invention
In order to solve prior art cannot the problem of noise that sends of independent measurement starter, the embodiment of the present invention
Provide a kind of noise-measuring system and method.Described technical scheme is as follows:
On the one hand, it is provided that a kind of noise-measuring system, for measuring the noise that starter sends, described in make an uproar
Electroacoustic measurement apparatus includes fixed structure, the first microphone, speed probe and data processor, described fixing
Structure is used for fixing described starter, and keeps the axis of the starter toothed wheel in described starter to put down with horizontal plane
OK, described first microphone is arranged near described starter toothed wheel, and described first microphone is used for measuring described rising
The noise that motivation sends, described speed probe is arranged on described starter or arranges near described starter,
Described speed probe is for measuring the speed that described starter toothed wheel rotates, described first microphone, described turn
Speed sensor all electrically connects with described data processor, and described data processor is used for collecting and process described the
The data that one microphone measures with described speed probe；
Described noise-measuring system also includes that adjustable support frame, described fixed structure are arranged on described scalable
On bracing frame, described adjustable support frame is for regulating the height of described fixed structure；
Described adjustable support frame includes that base, height adjusting blocks and screw rod, described base are arranged on described solid
Below fixed structure, described height adjusting blocks is arranged on described base, described screw rod be arranged on described base with
Between described fixed structure, one end of described screw rod is connected with described fixed structure, the other end of described screw rod
Inserting in described base through described height adjusting blocks, described height adjusting blocks is used for regulating described screw rod and inserts
The length of described base.
Further, described speed probe is photoelectric sensor.
Further, described data processor includes data acquisition components and data display analytic unit, described
Data acquisition components respectively with described first microphone, described speed probe, described DDA analysis group
Part electrically connects.
Further, described noise-measuring system also includes that the second microphone, described second microphone are used for surveying
The noise that fixed described starter sends, described first microphone, described second microphone all with described starting tooth
The axis of wheel is vertical, and the distance of described second microphone and described starter toothed wheel is more than described first microphone
Distance with described starter toothed wheel.
As preferably, described noise-measuring system also includes that cushion, described cushion are arranged on described screw rod
And between described fixed structure.
Further, described noise-measuring system also includes D.C. regulated power supply, described D.C. regulated power supply with
Described starter electrically connects.
On the other hand, it is provided that a kind of noise measuring method, described noise measuring method includes:
Fixing starter；
Starter toothed wheel near described starter arranges the first microphone；
On described starter or near described starter, speed probe is set；
Described first microphone, described speed probe are electrically connected with data processor respectively；
Starting described starter, the noise sent described starter by described first microphone is measured
And it is transferred to described data processor, by described speed probe, the rotating speed of described starter toothed wheel is surveyed
Determine and be transferred to described data processor；
Described noise measuring method also includes:
Arranging adjustable support frame, described fixed structure is arranged on described adjustable support frame, described adjustable
Joint bracing frame is for regulating the height of described fixed structure；
Described adjustable support frame includes that base, height adjusting blocks and screw rod, described base are arranged on described solid
Below fixed structure, described height adjusting blocks is arranged on described base, described screw rod be arranged on described base with
Between described fixed structure, one end of described screw rod is connected with described fixed structure, the other end of described screw rod
Inserting in described base through described height adjusting blocks, described height adjusting blocks is used for regulating described screw rod and inserts
The length of described base.
Further, described noise measuring method also includes:
Second microphone is set, keeps the distance of described second microphone and described starter toothed wheel more than described the
One microphone and the distance of described starter toothed wheel；
Described second microphone is electrically connected with described data processor.
The technical scheme that the embodiment of the present invention provides has the benefit that
Starter is fixed by the noise-measuring system that the present invention provides by fixed structure, and by arranging first
Microphone and speed probe, under a certain rotating speed, the noise sending starter carries out independent measurement, from
Fundamentally avoid automobile miscellaneous part to send noise and cause accurately obtaining the noise that starter sends
Situation so that staff can be analyzed according to the noise that the starter individually recorded sends, and obtains
Starter produces noise and the reason of hangover sound, thus further starter is optimized improvement.This
The noise measuring method of bright offer, by simulated firing machine running status in the car, to the full extent
Ensure that the accuracy of measurement, and the starter of disposable type can be carried out noise measurement have flexibly
Good, the versatility advantages of higher of property.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the noise-measuring system structural representation that the embodiment of the present invention provides；
Fig. 2 is the noise measuring method flow chart that the embodiment of the present invention provides；
Wherein,
1 starter,
2 fixed structures,
3 first microphones,
4 speed probes,
5 data processors,
6 second microphones,
7 bases,
8 height adjusting blocks,
9 screw rods,
10 cushions,
11 D.C. regulated power supplies.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Embodiment one
As it is shown in figure 1, embodiments provide a kind of noise-measuring system, it is used for measuring starter 1
The noise sent, including fixed structure the 2, first microphone 3, speed probe 4 and data processor 5,
Fixed structure 2 is used for fixing starter 1, and keeps axis and the horizontal plane of starter toothed wheel 2 in starter 1
Parallel, the first microphone 3 is arranged near starter toothed wheel 2, and the first microphone 3 is used for measuring 1, starter
The noise gone out, speed probe 4 is arranged on starter 1 or arranges near starter 1, speed probe 4
For measuring the speed that starter toothed wheel 2 rotates, the first microphone 3, speed probe 4 are all and data processor
5 electrical connections, data processor 5 is for collecting and process the number that the first microphone 3 measures with speed probe 4
According to.During use, starter 1 is arranged on fixed structure 2, keeps starter toothed wheel 2 in starter 1
Axis and plane-parallel, rotate the starter toothed wheel 2 in starter 1, simultaneously by speed probe 4
Measure the rotating speed of starter toothed wheel 2, and measure starter toothed wheel 2 under this rotating speed by the first microphone 3
Noise, the noise that the rotating speed of speed probe 4 mensuration and the first microphone 3 measure is sent to data processor 5,
Collected by data processor 5.The data collected during for measuring every time, can be by data line transfer to electricity
In brain, make staff by being analyzed to judge that starter 1 produces noise and hangover to the data collected
The reason of sound, and the structure of starter 1 is optimized design.
It should be understood that the first microphone 3 measures starter 1 in the near field around starter 1
The noise sent, is generally set to 10cm by the distance between the first microphone 3 and starter toothed wheel 2.Further,
First microphone 3 is specifically located at starter toothed wheel 2 side, makes the corresponding starter receiver of the first microphone 3
Tooth is arranged.Speed probe 4 is specifically located at the end of starter toothed wheel 2, wherein, if speed probe 4
Select common speed probe 4, then speed probe 4 is arranged on the gear shaft of starter toothed wheel 2, by
This measures the rotating speed of starter toothed wheel 2；If photoelectric sensor 4 selected by speed probe 4, then photoelectricity is turned
Speed sensor 4 is positioned close to the suitable position of starter 1, to ensure the light from starter toothed wheel 2 reflection
Line can be received by photoelectric sensor 4.
Starter 1 is fixed by the noise-measuring system that the present invention provides by fixed structure 2, and by arranging
First microphone 3 and speed probe 4, under a certain rotating speed, the noise sending starter 1 is carried out individually
Measure, fundamentally avoid automobile miscellaneous part and send noise and cause cannot accurately obtaining 1, starter
The situation of the noise gone out so that staff can be carried out according to the noise that the starter 1 individually recorded sends
Analyze, and obtain starter 1 and produce noise and the reason of hangover sound, thus further starter 1 is entered
Row Optimal improvements.
Further, embodiments providing a kind of noise-measuring system, wherein speed probe 4 is
Photoelectric sensor 4.Use photoelectric sensor 4 can ensure that and be fitted without other on starter 1
Components and parts, it is ensured that during measuring state and the normal operating conditions of starter 1 closest to, thus
Ensure the measurement result to the noise that starter 1 sends.
Further, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, wherein count
Including data acquisition components and data display analytic unit according to processor 5, data acquisition components is for record the
The data that one microphone 3 records with speed probe 4, usual data acquisition components is specially data acquisition unit
Or memorizer etc., DDA analysis assembly facilitates staff to watch for the data recorded being shown,
And the data recorded are analyzed, usual DDA analysis assembly is specially computer.
Further, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, also include
Second microphone 6, the second microphone 6 for measuring the noise that starter 1 sends, the first microphone 3, the
Two microphones 6 are all vertical with the axis of starter toothed wheel 2, and the distance of the second microphone 6 and starter toothed wheel 2
Distance more than the first microphone 3 with starter toothed wheel 2.
It should be understood that the second microphone 6 measures starter 1 in the far field around starter 1
The noise sent, is generally set to 1m by the distance between the second microphone 6 and starter toothed wheel 2.Meanwhile,
First microphone 3 is disposed as the state vertical with the axis of starter toothed wheel 2 with the second microphone 6, can
To facilitate the first microphone 3 more clearly to measure the noise that starter 1 sends with the second microphone 6.And
And by arranging distance, the second microphone 6 and the starter toothed wheel 2 between the first microphone 3 and starter toothed wheel 2
Between distance different, the noise of starter toothed wheel 2 at many group different distance when measuring, can be measured,
Make staff can obtain more comprehensively data when the noise sending starter 1 is analyzed to prop up
Hold.
And staff can be arranged around multiple microphone at starter 1 according to actual needs, and will
Multiple microphones are arranged on starter toothed wheel 2 around according to different distances, are used for detecting starter toothed wheel 2 weeks
Enclose multiple direction, the noise of multiple distance, and according to multi-group data, starter 1 is carried out the most excellent
Change design.
Further, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, also include
Adjustable support frame, fixed structure 2 is arranged on adjustable support frame, and adjustable support frame is used for regulating admittedly
The height of fixed structure 2.
Further, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, wherein
Adjustable support frame includes base 7, height adjusting blocks 8 and screw rod 9, and base 7 is arranged on fixed structure 2 times
Side, height adjusting blocks 8 is arranged on base 7, and screw rod 9 is arranged between base 7 and fixed structure 2,
One end of screw rod 9 is connected with fixed structure 2, and the other end of screw rod 9 passes height adjusting blocks 8 inserted base 7
In, height adjusting blocks 8 is for the length of adjusting screw rod 9 inserted base 7, thus adjusting screw rod 9 is positioned at height
Length above degree regulating block 8, and then the height of adjustment fixing structure 2.
As preferably, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, also include
Cushion 10, cushion 10 is arranged between screw rod 9 and fixed structure 2.Due to starter toothed wheel 2 rotation
During, fixed structure 2 more or less can be caused to produce certain vibrations, thus fixed structure 2 can be caused
And produce some frictions or collision between adjustable support frame, in adjustable support frame self between all parts,
Likely can send number voice final measurement result is interfered, thus need fixed structure 2 with
Cushion 10 is set between adjustable support frame, so that the vibrations that fixed structure 2 is produced by starter 1
Eliminated by the cushioning effect of cushion 10, fundamentally avoid fixed structure 2 and adjustable support frame
Between the vibrations that likely occur, it is ensured that the present invention carries out the data that noise measurement obtains to starter 1
Accuracy.
Further, as it is shown in figure 1, embodiments provide a kind of noise-measuring system, also include
D.C. regulated power supply 11, D.C. regulated power supply 11 electrically connects with starter 1.By arranging D.C. regulated power supply
11 can be that starter 1 provides power, it is ensured that the starter toothed wheel 2 in starter 1 continues, rotates smoothly.
Starter 1 is fixed by the noise-measuring system that the present invention provides by fixed structure 2, and by arranging
First microphone 3 and speed probe 4, under a certain rotating speed, the noise sending starter 1 is carried out individually
Measure, fundamentally avoid automobile miscellaneous part and send noise and cause cannot accurately obtaining 1, starter
The situation of the noise gone out so that staff can be carried out according to the noise that the starter 1 individually recorded sends
Analyze, and obtain starter 1 and produce noise and the reason of hangover sound, thus further starter 1 is entered
Row Optimal improvements.And the noise-measuring system that the present invention provides, it is possible to get rid of other noise source interference, make
The test result obtaining starter 1 can be with objective evaluation starter 1 monomer noise level.This measurement apparatus is suitable for
Property and highly versatile, can be suitably used for starter 1 noise measurement (containing competing product starter 1) of different model, base
The difference of the noise that different starter 1 sends can be compared in test result, carry for starter 1 structure optimization
For data support.This measurement apparatus simple in construction, handling ease, low cost, easy to use, measuring
Cheng Zhong, starter 1 is installed, dismantles and is changed easily, can improve work efficiency.
Embodiment two
As in figure 2 it is shown, embodiments provide a kind of noise measuring method, described noise measuring method
Including:
Step 201: fixing starter 1.
Specifically, be fixed on fixed structure 2 by starter 1, and keep starter toothed wheel 2 in starter 1
Axis and plane-parallel.
Step 202: the starter toothed wheel 2 near starter 1 arranges the first microphone 3.
It should be understood that when arranging the first microphone 3, the first microphone 3 and starter toothed wheel 2 need to be ensured
Axis vertical, to ensure that the noise of starter 1 can be directly received by the first microphone 3, it is ensured that the
The noise that the starter 1 that one microphone 3 measures sends is clear.
Step 203: speed probe 4 is set on starter 1 or near starter 1.
Wherein, if common speed probe 4 selected by speed probe 4, then speed probe 4 is arranged on
On the gear shaft of starter toothed wheel 2, thus measure the rotating speed of starter toothed wheel 2；
If photoelectric sensor 4 selected by speed probe 4, then photoelectric sensor 4 is positioned close to
The suitable position of starter 1, to ensure that the light from starter toothed wheel 2 reflection can be by photoelectric sensor 4
Receive.
Step 204: the first microphone 3, speed probe 4 are electrically connected with data processor 5 respectively.
Thus the data that the first microphone 3 and speed probe 4 measure can be transferred to data processor 5,
And collected by data processor 5 and carry out display and analyze.
Step 205: starting starter 1, the noise sent starter 1 by the first microphone 3 is surveyed
Determine and be transferred to data processor 5, by speed probe 4 rotating speed of starter toothed wheel 2 be measured and pass
It is defeated by data processor 5.
Further, embodiments provide a kind of noise measuring method, also include:
Second microphone 6 is set, keeps second microphone 6 distance with starter toothed wheel 2 more than the first microphone
3 with the distance of starter toothed wheel 2；
Second microphone 6 is electrically connected with data processor 5.
It should be noted that when arranging the second microphone 6, need ensure the second microphone 6 and start tooth
The axis of wheel 2 is vertical, to ensure that the noise of starter 1 can be directly received by the second microphone 6, protects
Demonstrate,prove the noise that sends of starter 1 that the second microphone 6 measures clear.This step should start starter 1 it
Before carry out.
When same starter 1 is tested by the present invention, at least three group data should be tested to ensure test
The accuracy of result.
The noise measuring method that the present invention provides, by simulated firing machine 1 running status in the car, from
Ensure that the accuracy of measurement to the full extent, and the starter 1 of disposable type can be carried out noise survey
Amount, has motility good, and versatility is high, test simply, advantage accurately and efficiently.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in the present invention's
Within protection domain.
Claims (8)
1. a noise-measuring system, for measuring the noise that starter sends, it is characterised in that described in make an uproar
Electroacoustic measurement apparatus includes fixed structure, the first microphone, speed probe and data processor, described fixing
Structure is used for fixing described starter, and keeps the axis of the starter toothed wheel in described starter to put down with horizontal plane
OK, described first microphone is arranged near described starter toothed wheel, and described first microphone is used for measuring described rising
The noise that motivation sends, described speed probe is arranged on described starter or arranges near described starter,
Described speed probe is for measuring the speed that described starter toothed wheel rotates, described first microphone, described turn
Speed sensor all electrically connects with described data processor, and described data processor is used for collecting and process described the
The data that one microphone measures with described speed probe；
Described noise-measuring system also includes that adjustable support frame, described fixed structure are arranged on described scalable
On bracing frame, described adjustable support frame is for regulating the height of described fixed structure；
Described adjustable support frame includes that base, height adjusting blocks and screw rod, described base are arranged on described solid
Below fixed structure, described height adjusting blocks is arranged on described base, described screw rod be arranged on described base with
Between described fixed structure, one end of described screw rod is connected with described fixed structure, the other end of described screw rod
Inserting in described base through described height adjusting blocks, described height adjusting blocks is used for regulating described screw rod and inserts
The length of described base.
Noise-measuring system the most according to claim 1, it is characterised in that described speed probe is
Photoelectric sensor.
Noise-measuring system the most according to claim 1, it is characterised in that described data processor bag
Including data acquisition components and data display analytic unit, described data acquisition components is first transaudient with described respectively
Device, described speed probe, described DDA analysis assembly electrically connect.
Noise-measuring system the most according to claim 1, it is characterised in that described noise-measuring system
Also include the second microphone, described second microphone for measuring the noise that described starter sends, described the
One microphone, described second microphone are all vertical with the axis of described starter toothed wheel, and described second microphone
With the distance of described starter toothed wheel more than described first microphone and the distance of described starter toothed wheel.
Noise-measuring system the most according to claim 1, it is characterised in that described noise-measuring system
Also include that cushion, described cushion are arranged between described screw rod and described fixed structure.
Noise-measuring system the most according to claim 1, it is characterised in that described noise-measuring system
Also include that D.C. regulated power supply, described D.C. regulated power supply electrically connect with described starter.
7. a noise measuring method, it is characterised in that described noise measuring method includes:
Fixing starter；
Starter toothed wheel in described starter arranges the first microphone；
On described starter or near described starter, speed probe is set；
Described first microphone, described speed probe are electrically connected with data processor respectively；
Starting described starter, the noise sent described starter by described first microphone is measured
And it is transferred to described data processor, by described speed probe, the rotating speed of described starter toothed wheel is surveyed
Determine and be transferred to described data processor；
Described noise measuring method also includes:
Arranging adjustable support frame, described fixed structure is arranged on described adjustable support frame, described adjustable
Joint bracing frame is for regulating the height of described fixed structure；
Described adjustable support frame includes that base, height adjusting blocks and screw rod, described base are arranged on described solid
Below fixed structure, described height adjusting blocks is arranged on described base, described screw rod be arranged on described base with
Between described fixed structure, one end of described screw rod is connected with described fixed structure, the other end of described screw rod
Inserting in described base through described height adjusting blocks, described height adjusting blocks is used for regulating described screw rod and inserts
The length of described base.
Noise measuring method the most according to claim 7, it is characterised in that described noise measuring method
Also include:
Second microphone is set, keeps the distance of described second microphone and described starter toothed wheel more than described the
One microphone and the distance of described starter toothed wheel；
Described second microphone is electrically connected with described data processor.
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| CN201410127290.6A CN103983346B (en) | 2014-03-31 | 2014-03-31 | A kind of noise-measuring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104215454A (en) * | 2014-09-19 | 2014-12-17 | 武汉理工大学 | Automotive rear bridge main speed reducer noise performance testing method |
| CN105136271A (en) * | 2015-05-19 | 2015-12-09 | 奇瑞汽车股份有限公司 | Noise measurement method and device, and vibration measurement method and device |
| CN105241542A (en) * | 2015-08-30 | 2016-01-13 | 盐城工学院 | Frictional screaming noise generation method and device |
| CN108871791B (en) * | 2018-06-28 | 2020-08-04 | 奇瑞汽车股份有限公司 | Automobile starting noise testing device and testing method |
| CN109406160A (en) * | 2018-09-04 | 2019-03-01 | 华南理工大学 | Low speed brakes CVT gearbox abnormal sound test when driving and analysis system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526816Y (en) * | 2002-02-21 | 2002-12-18 | 南京第二机床厂 | Gear noise inspection apparatus |
| CN201039427Y (en) * | 2007-05-15 | 2008-03-19 | 恩沛音响设备(上海)有限公司 | Transmitter supporter |
| CN202057773U (en) * | 2011-07-26 | 2011-11-30 | 北京丰荣航空科技有限公司 | Airplane starter performance detection apparatus |
| CN103674223A (en) * | 2013-12-13 | 2014-03-26 | 中联重科股份有限公司渭南分公司 | Device, system and method for testing noise source |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0743206A (en) * | 1993-07-30 | 1995-02-14 | Hitachi Ltd | Method and device for measuring vibration of rotary blade |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2526816Y (en) * | 2002-02-21 | 2002-12-18 | 南京第二机床厂 | Gear noise inspection apparatus |
| CN201039427Y (en) * | 2007-05-15 | 2008-03-19 | 恩沛音响设备(上海)有限公司 | Transmitter supporter |
| CN202057773U (en) * | 2011-07-26 | 2011-11-30 | 北京丰荣航空科技有限公司 | Airplane starter performance detection apparatus |
| CN103674223A (en) * | 2013-12-13 | 2014-03-26 | 中联重科股份有限公司渭南分公司 | Device, system and method for testing noise source |
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