CN108254172A - A kind of new automobile side door lock sound quality testboard bay - Google Patents
A kind of new automobile side door lock sound quality testboard bay Download PDFInfo
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- CN108254172A CN108254172A CN201810049372.1A CN201810049372A CN108254172A CN 108254172 A CN108254172 A CN 108254172A CN 201810049372 A CN201810049372 A CN 201810049372A CN 108254172 A CN108254172 A CN 108254172A
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- lock
- door lock
- sound quality
- doorframe
- high rigidity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of new automobile side door lock sound quality testboard bay, including shutdown bench frame apparatus, door closing speed test device and data acquisition device；Shutdown bench frame apparatus includes high rigidity hinge mounting support, doorframe and high rigidity lock mounting bracket, for simulating the switch of doorframe；Door closing speed test device includes digital indicator and sensing cutting element, and the switching speed of doorframe is detected；Data acquisition device includes dummy head and the microphone arm that can test door lock near field far-field noise, and for testing the microphone of door lock near field far-field noise and sound quality, microphone is close to latch bracket and lock catch support.Microphone of the present invention is close to the latch bracket and lock catch support, to solve at present in semianechoic room to door lock sound quality testboard bay vacancy, and solve the selection to sample car production front door lock and evaluation test do not have approach and for mark car door lock to mapping examination testing cost is higher in fixed vehicle the problems such as.
Description
Technical field
The invention belongs to door lock for vehicle NVH performance tests field, more particularly, to a kind of new automobile side door lock sound product
Matter testboard bay.
Background technology
With flourishing for automobile industry, consumer is also increasing to the attention rate of auto NVH, and auto parts and components
Noise and sound quality directly affect evaluation of the customer to automotive quality, door lock is closed as the component being commonly used
The quality of noise and sound quality becomes the focus of most consumer evaluation's automotive quality, while is also that automobile main frame maker dashes forward
One of broken the problem of improving focus, influences to weaken automobile door lock system caused by switch gate sound quality, to door lock
Sound quality research it is quite significant.At present in semianechoic room to door lock sound quality testboard bay vacancy, and it is difficult to reflect that real vehicle is pacified
The state of door lock is filled, test method is also more not perfect, disunity.Selection and the no way of evaluation test to sample car production front door lock
Diameter, and to mapping examination, the testing cost in fixed vehicle is higher for mark car door lock.
Invention content
In view of this, the present invention is directed to propose a kind of new automobile side door lock sound quality testboard bay, to solve mesh
It is preceding in semianechoic room to door lock sound quality testboard bay vacancy, and be difficult to reflect the state of real vehicle installation door lock, and solve
Selection and evaluation test to sample car production front door lock do not have approach and are fixing vehicle to mapping examination for mark car door lock
The problems such as testing cost is higher in type.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of new automobile side door lock sound quality testboard bay, including shutdown bench frame apparatus, door closing speed test device
And data acquisition device；
The shutdown bench frame apparatus is equipped with the car door of simulated automotive car door folding, the stent for installing door lock and installation lock
Stent；The door closing speed test device is to the arrangements for automotive doors in the shutdown bench frame apparatus from certain opening angle to complete
Locking process sound is tested；The data acquisition device is to the arrangements for automotive doors folding generation sound in the shutdown bench frame apparatus
The data of sound are acquired.
Further, the car door of the simulated automotive car door folding is doorframe, and the stent of the installation door lock is can be with door
The latch bracket of cooperation is locked, the stent of the installation lock latches mounting bracket for high rigidity and can be with the lock branch of snap fit
Frame；
The doorframe side is equipped with high rigidity hinge mounting support, and the high rigidity lock mounting bracket is arranged on the door
Frame opposite side, the doorframe are rotatablely connected with the high rigidity hinge mounting support, and the doorframe is pacified with the high rigidity hinge
Dress stent slides up and down connection, and the latch bracket is arranged on the doorframe；The lock catch support is arranged on the high rigidity
It latches in mounting bracket, the latch bracket can be connect by door lock and lock with the lock catch support；
The door closing speed test device includes digital indicator and sensing cutting element, the sensing cutting element setting
On the doorframe, the digital indicator is equipped with the magnetic induction part that can test the sensing cutting element speed；
The data acquisition device includes that the dummy head of door lock near field far-field noise and sound quality and microphone branch can be tested
Frame, the dummy head are arranged in front of the doorframe, set that there are two can test door lock near field far field to make an uproar on the microphone arm
The microphone of sound and sound quality, the microphone is close to the latch bracket and lock catch support.
Further, the lock catch support is equipped with the single track of sliding track slidably latched, the high rigidity hinge installation
Stent is equipped with two-orbit sliding rail, and the doorframe is slided up and down by the two-orbit sliding rail.
Further, the doorframe passes sequentially through hinge, hinge coordinating block and adjusting slider with the two-orbit sliding rail and connects
It connects, the doorframe is rotatablely connected with the hinge.
Further, the sensing cutting element is arranged on the doorframe edge frame, the digital indicator and magnetic
Sensing element is arranged on the high rigidity lock mounting bracket.
Further, the high rigidity lock installation frame waist location is equipped with lateral reinforcing beam, the high rigidity lock
Installation frame bottom is equipped with triangle reinforcing plate.
Further, the high rigidity hinge installation frame is equipped with vibration isolation with high rigidity lock installation frame bottom
Rubber.
Further, the high rigidity hinge mounting support avris is equipped with multiple reinforcement square holes.
Further, the microphone arm can carry out the adjusting of six-freedom degree, and the microphone is close to the door lock
Stent and lock catch support, two microphones are respectively 10cm away from the latch bracket and lock catch support cooperation position horizontal distance,
50cm。
Further, the dummy head is arranged on the latch bracket and lock catch support cooperation position front horizontal distance
At 100cm, high 172cm, the dummy head bottom is equipped with triangular support bracket.
Relative to the prior art, a kind of new automobile side door lock sound quality testboard bay of the present invention has following
Advantage：
A kind of new automobile side door lock sound quality testboard bay of the present invention, is meeting making an uproar for various model door locks
Under sound and sound quality test case, of low cost, dependable performance is manufactured, it is easy to operate, have in this testboard bay main frame structure
There is high rigidity, there is low noise during the work time.It can be installed and cut with scissors by hinge coordinating block according to different automobile types simultaneously
Chain adjusts to rack and substantially conforms to the state installed with real vehicle, doorframe weight and width and real vehicle quality, is closely sized to, more can be true
Real reflection real vehicle shutdown door lock closure situation.It is suitable that lock can coordinate door lock to obtain by single slideway lock catch support up and down adjustment
Position.Speed testing device on testboard bay can monitor common door closing speed on door closing speed, with real vehicle each time and meet
Certain rate conversion relationship.Harvester is equipped with the higher dummy head of fidelity and near field microphone, and installation position can be with
Be consistent in real steering vectors shutdown sound quality, can test result can check one against another on real vehicle with door lock, have it is higher
Data can refer to and compare meaning.
Description of the drawings
The attached drawing for forming the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is a kind of new automobile side door lock sound quality testboard bay schematic diagram described in the embodiment of the present invention；
Fig. 2 is the shutdown rack in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention
Schematic device；
Fig. 3 is the velocity test in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention
Device stereoscopic schematic diagram；
Fig. 4 is the microphone branch in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention
Frame schematic diagram；
Fig. 5 is that the dummy head in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention shows
It is intended to；
Fig. 6 is the shutdown rack in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention
The front view of device；
Fig. 7 is the shutdown rack in a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention
The left view of device；
Fig. 8 is that a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention carries out test 01
The time-frequency figure of door lock；
Fig. 9 is that a kind of new automobile side door lock sound quality testboard bay described in the embodiment of the present invention carries out test 02
The time-frequency figure of door lock.
Reference sign：
1- high rigidity hinge mounting supports；The bis- slideway sliding rails of 2-；3- adjusting sliders；4- hinge coordinating blocks；5- hinges；6-
Frame；7- latch brackets；8- lock catch supports；9- high rigidities latch mounting bracket；10- vibration isolation rubbers；11- digital indicators；12- magnetic
Sensing element；13- senses cutting element；14- dummy heads；15- triangular support brackets；16- microphone arms；17- microphones.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instructions such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
Show that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for description purpose, and it is not intended that instruction or hint phase
To importance or the implicit quantity for indicating indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of new automobile side door lock sound quality testboard bay as shown in figs. 1-7, including shutdown bench frame apparatus, is closed the door
Speed testing device and data acquisition device；
Shutdown bench frame apparatus is equipped with the branch of the car door of simulated automotive car door folding, the stent for installing door lock and installation lock
Frame；Door closing speed test device tests the arrangements for automotive doors folding speed in shutdown bench frame apparatus；Data acquisition device pair
The data that arrangements for automotive doors folding in shutdown bench frame apparatus generates sound are acquired.
The car door of simulated automotive car door folding is doorframe 6, and the stent for installing door lock is the latch bracket that can coordinate with door lock
7, the stent for installing lock latches mounting bracket 9 for high rigidity and can pass through with the lock catch support 8 of snap fit, latch bracket 7
Door lock and lock can be connect with lock catch support 8；
6 side of doorframe is equipped with high rigidity hinge mounting support 1, and it is another that high rigidity lock mounting bracket 9 is arranged on doorframe 6
Side, doorframe 6 are rotatablely connected with high rigidity hinge mounting support 1, and doorframe 6 is slided up and down with high rigidity hinge mounting support 1 and connect,
Latch bracket 7 is arranged on doorframe 6；Lock catch support 8 is arranged in high rigidity lock mounting bracket 9, and latch bracket 7 passes through door lock
And lock can be connect with lock catch support 8；
Door closing speed test device includes digital indicator 11 and sensing cutting element 13, and sensing cutting element 13 is arranged on
On doorframe 6, digital indicator 11 is equipped with the magnetic induction part 12 that can test sensing 13 speed of cutting element；
Data acquisition device includes dummy head 14 and the microphone arm that can test door lock near field far-field noise and sound quality
16, dummy head 14 is arranged on the front of doorframe 6, sets that there are two can test door lock near field far-field noise and sound quality on microphone arm
Microphone 17, microphone 17 is close to latch bracket 7 and lock catch support 8.It is existing that door closing speed test device is alternatively other
It can be to device that the arrangements for automotive doors folding speed in shutdown bench frame apparatus is tested for example：Photoelectric speed sensor, suddenly
Your formula velocity sensor etc.；Data acquisition device is alternatively other to the arrangements for automotive doors folding generation sound in shutdown bench frame apparatus
The device that the data of sound are acquired.
Lock catch support 8 is equipped with the single track of sliding track slidably latched, and lock can be found with up and down adjustment to be coordinated with door lock
Suitable position, high rigidity hinge mounting support 1 be equipped with two-orbit sliding rail 2, doorframe 6 on two-orbit sliding rail 2 by gliding
It is dynamic.
Doorframe 6 passes sequentially through hinge 5, hinge coordinating block 4 and adjusting slider 3 with two-orbit sliding rail 2 and connect, doorframe 6 and hinge
Chain 5 is rotatablely connected, and adjusting slider 3 is mounted on double slideway sliding rails 2 further through slide bolt, and spiral shell is evenly arranged on double slideway sliding rails 2
Hole is bolted on high rigidity hinge installation frame 1.
Sensing cutting element 13 is arranged on 6 edge frame of doorframe, and digital indicator 11 and magnetic induction part 12 are arranged on
High rigidity latches mounting bracket 9.
High rigidity 9 waist location of lock installation frame is equipped with lateral reinforcing beam, and 9 bottom of high rigidity lock installation frame is set
There is triangle reinforcing plate.
High rigidity hinge installation frame 1 is equipped with vibration isolation rubber 10 with 9 bottom of high rigidity lock installation frame.
1 avris of high rigidity hinge mounting support is equipped with multiple reinforcement square holes, good convenient for being provided for data acquisition device
Acoustic environment.
Microphone arm 16 can carry out the adjusting of six-freedom degree, microphone 17 close to latch bracket 7 and lock catch support 8,
Two microphones 17 are respectively 10cm, 50cm away from latch bracket 7 and 8 cooperation position horizontal distance of lock catch support.
Dummy head 14 is arranged at 8 cooperation position front horizontal distance 100cm of latch bracket 7 and lock catch support, high
172cm, 14 bottom of dummy head are equipped with triangular support bracket 15.
The working method of this example
The external collecting device of data acquisition device, collecting device are connect respectively with dummy head 14,17 output terminal of microphone, point
It Ce Shi not door lock near field, far-field noise and sound quality.The output terminal of collecting device connects computer by USB line and obtains sound
Sample is analyzed, and is as follows：
No. 01 door lock of certain vehicle is mounted on by single slideway latch bracket 8 on doorframe 6 first, corresponding lock is mounted on
On high rigidity lock 9 column of installation frame, lock is adjusted to suitable position by single slideway mounting bracket 8, it is made to meet real vehicle
Installation condition.
Two microphones 17 are separately mounted on microphone arm 16, adjusting position makes it respectively away from door lock central horizontal
For 10cm, 50cm, dummy head 14 is adjusted and door lock horizontal distance 100cm, away from the high 172cm in ground, microphone 17 and artificial distance
First 14 acquire the sample sound in door lock near field, far field respectively.
Doorframe 6 is opened to 45 degree, by the door closing speed of door closing speed device control 0.8m/s, restores real steering vectors shutdown sound
Minimum door closing speed state during quality, by told requirement carry out repeatedly close doorframe 6 operate, and lock on the door lock process into
Row data acquire, and experiment is completed after carrying out 5 groups of valid data acquisitions.Door lock data sample is analyzed in a computer, point
The psychologic acoustics parameters such as door lock loudness, sharpness are precipitated and time-frequency figure comes objective evaluation door lock noise figure and sound quality, such as table 1 and
Shown in Fig. 8；
Table 1
| Parameter | Sound pressure level | Loudness | Sharpness |
| Numerical value | 88.1dB(A) | 69.4SoneGF | 6.1acum |
No. 02 door lock of certain vehicle is mounted on by single slideway latch bracket 8 on doorframe, corresponding lock is mounted on Gao Gang
On degree lock 9 column of installation frame, lock is adjusted to suitable position by single slideway mounting bracket 8, it is made to meet real vehicle installation
State.
Two microphones 17 are separately mounted on microphone arm 16, adjusting position makes it respectively away from door lock central horizontal
For 10cm, 50cm, dummy head 14 is adjusted and door lock horizontal distance 100cm, away from the high 172cm in ground, microphone 17 and artificial distance
First 14 acquire the sample sound in door lock near field, far field respectively.
Doorframe 6 is opened to 45 degree, by the door closing speed of door closing speed device control 0.8m/s, restores real steering vectors shutdown sound
Minimum door closing speed state during quality, by told requirement carry out repeatedly close doorframe 6 operate, and lock on the door lock process into
Row data acquire, and experiment is completed after carrying out 5 groups of valid data acquisitions.Door lock data sample is analyzed in a computer, point
The psychologic acoustics parameters such as door lock loudness, sharpness are precipitated and time-frequency figure comes objective evaluation door lock noise figure and sound quality, such as table 2 and
Shown in Fig. 9；
Table 2
| Parameter | Sound pressure level | Loudness | Sharpness |
| Numerical value | 87.6dB(A) | 73.6SoneGF | 5.5acum |
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of new automobile side door lock sound quality testboard bay, it is characterised in that：Including shutdown bench frame apparatus, door closing speed
Test device and data acquisition device；
The shutdown bench frame apparatus includes the branch of the car door of simulated automotive car door folding, the stent for installing door lock and installation lock
Frame；The door closing speed test device tests the arrangements for automotive doors folding speed in the shutdown bench frame apparatus；The number
The data for generating sound to the arrangements for automotive doors folding in the shutdown bench frame apparatus according to harvester are acquired.
2. a kind of new automobile side door lock sound quality testboard bay according to claim 1, it is characterised in that：The mould
The car door for intending arrangements for automotive doors folding is doorframe (6), and the stent of the installation door lock is the latch bracket (7) that can coordinate with door lock,
The stent of the installation lock latches mounting bracket (9) for high rigidity and can be with the lock catch support (8) of snap fit；
Doorframe (6) side is equipped with high rigidity hinge mounting support (1), and the high rigidity lock mounting bracket (9) is arranged on
Doorframe (6) opposite side, the doorframe (6) are rotatablely connected with the high rigidity hinge mounting support (1), the doorframe (6)
It slides up and down and connect with the high rigidity hinge mounting support (1), the latch bracket (7) is arranged on the doorframe (6)；Institute
It states lock catch support (8) to be arranged on the high rigidity lock mounting bracket (9), the latch bracket (7) passes through door lock and lock
It can be connect with the lock catch support (8)；
The door closing speed test device includes digital indicator (11) and sensing cutting element (13), the sensing cutting element
(13) it is arranged on the doorframe (6), the digital indicator (11), which is equipped with, can test sensing cutting element (13) speed
The magnetic induction part (12) of degree；
The data acquisition device includes that door lock near field far-field noise and the dummy head (14) of sound quality and microphone branch can be tested
Frame (16), the dummy head (14) are arranged in front of the doorframe (6), set that there are two can test door lock on the microphone arm
The microphone of near field far-field noise and sound quality (17).
3. a kind of new automobile side door lock sound quality testboard bay according to claim 2, it is characterised in that：The lock
Button stent (8) is equipped with the single track of sliding track slidably latched, and the high rigidity hinge mounting support (1) slides equipped with two-orbit
Rail (2), the doorframe (6) are slided up and down by the two-orbit sliding rail (2).
4. a kind of new automobile side door lock sound quality testboard bay according to claim 3, it is characterised in that：The door
Frame (6) passes sequentially through hinge (5), hinge coordinating block (4) and adjusting slider (3) with the two-orbit sliding rail (2) and connect, the door
Frame (6) is rotatablely connected with the hinge (5).
5. a kind of new automobile side door lock sound quality testboard bay according to claim 2, it is characterised in that：The sense
Cutting element (13) is answered to be arranged on the doorframe (6) edge frame, the digital indicator (11) and magnetic induction part (12)
It is arranged on the high rigidity lock mounting bracket (9).
6. a kind of new automobile side door lock sound quality testboard bay according to claim 5, it is characterised in that：The height
Rigidity lock installation frame (9) waist location is equipped with lateral reinforcing beam, and described high rigidity lock installation frame (9) bottom is equipped with three
Angle reinforcing plate.
7. a kind of new automobile side door lock sound quality testboard bay according to claim 6, it is characterised in that：The height
Rigidity hinge installation frame (1) is equipped with vibration isolation rubber (10) with high rigidity lock installation frame (9) bottom.
8. a kind of new automobile side door lock sound quality testboard bay according to claim 7, it is characterised in that：The height
Rigidity hinge mounting support (1) avris is equipped with multiple reinforcement square holes.
9. a kind of new automobile side door lock sound quality testboard bay according to claim 2, it is characterised in that：The biography
Sound device stent (16) can carry out the adjusting of six-freedom degree, and the microphone (17) is close to the latch bracket (7) and lock branch
Frame (8), two microphones (17) are respectively 10cm away from the latch bracket (7) and lock catch support (8) cooperation position horizontal distance,
50cm。
10. a kind of new automobile side door lock sound quality testboard bay according to claim 2, it is characterised in that：It is described
Dummy head (14) is arranged at the latch bracket (7) and lock catch support (8) cooperation position front horizontal distance 100cm, high
172cm, dummy head (14) bottom are equipped with triangular support bracket (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049372.1A CN108254172A (en) | 2018-01-18 | 2018-01-18 | A kind of new automobile side door lock sound quality testboard bay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049372.1A CN108254172A (en) | 2018-01-18 | 2018-01-18 | A kind of new automobile side door lock sound quality testboard bay |
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| Publication Number | Publication Date |
|---|---|
| CN108254172A true CN108254172A (en) | 2018-07-06 |
Family
ID=62741306
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|---|---|---|---|
| CN201810049372.1A Pending CN108254172A (en) | 2018-01-18 | 2018-01-18 | A kind of new automobile side door lock sound quality testboard bay |
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| CN109489956A (en) * | 2018-12-07 | 2019-03-19 | 王佳颖 | A kind of automobile door lock noise testing device |
| CN109612745A (en) * | 2018-12-28 | 2019-04-12 | 大乘汽车有限公司 | Device and its test method for automobile door slam quality test |
| CN110208010A (en) * | 2019-07-18 | 2019-09-06 | 上汽大众汽车有限公司 | A kind of door lock security of system energy test device for vehicle impact testing |
| CN110567575A (en) * | 2019-08-12 | 2019-12-13 | 同济大学 | automobile door lock joint sound quality evaluation method |
| CN110749456A (en) * | 2019-10-31 | 2020-02-04 | 重庆长安汽车股份有限公司 | System and method for testing opening and closing sound quality of side-sliding type vehicle door |
| CN111006876A (en) * | 2019-12-17 | 2020-04-14 | 北京新能源汽车技术创新中心有限公司 | Method for measuring minimum door closing energy and minimum door closing speed of vehicle door |
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| CN113418722A (en) * | 2021-06-30 | 2021-09-21 | 一汽奔腾轿车有限公司 | Automobile sliding door opening and closing speed test rack and test method |
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| CN110567575B (en) * | 2019-08-12 | 2021-06-04 | 同济大学 | Automobile door lock joint sound quality evaluation method |
| CN110749456A (en) * | 2019-10-31 | 2020-02-04 | 重庆长安汽车股份有限公司 | System and method for testing opening and closing sound quality of side-sliding type vehicle door |
| CN111006876A (en) * | 2019-12-17 | 2020-04-14 | 北京新能源汽车技术创新中心有限公司 | Method for measuring minimum door closing energy and minimum door closing speed of vehicle door |
| CN112665714A (en) * | 2021-01-11 | 2021-04-16 | 东风汽车集团股份有限公司 | Auxiliary testing device for noise inside and outside vehicle |
| CN112665714B (en) * | 2021-01-11 | 2023-06-30 | 东风汽车集团股份有限公司 | Auxiliary testing device for noise inside and outside vehicle |
| CN113418722A (en) * | 2021-06-30 | 2021-09-21 | 一汽奔腾轿车有限公司 | Automobile sliding door opening and closing speed test rack and test method |
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