CN104776911A - Microphone fixing device for saloon car exterior tire noise testing - Google Patents
Microphone fixing device for saloon car exterior tire noise testing Download PDFInfo
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- CN104776911A CN104776911A CN201510202507.XA CN201510202507A CN104776911A CN 104776911 A CN104776911 A CN 104776911A CN 201510202507 A CN201510202507 A CN 201510202507A CN 104776911 A CN104776911 A CN 104776911A
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- microphone
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- fixing device
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Abstract
The invention relates to a microphone fixing device for saloon car exterior tire noise testing. A stand column is fixed to the upper surface of a base, a transverse rod is fixed to the top end of the stand column, an arc-shaped installation rod is fixed to the transverse rod, the cross section of the installation rod is circular, the two ends of the installation rod are fixed to the corresponding ends of the transverse rod, and a microphone chuck is installed on the installation rod. By means of the microphone fixing device, noise generated by an saloon car exterior tire is accurately and stably tested through a microphone measurement device, the position of a microphone can be freely adjusted in a multidirectional mode, the microphone fixing device is flexible in use and convenient to install, and the testing efficiency and the testing flexibility are greatly improved.
Description
Technical field
The present invention relates to a kind of Car cover noise-measuring system technical field, the present invention especially relates to a kind of Car cover noise testing microphone stationary installation.
Background technology
Automobile noise, when namely running car is on road, engine, loudspeaker, tire etc. all can send a large amount of noises.Automobile noise has a strong impact on the healthy of people.In recent years, urban motor vehicle increases very fast, and incident traffic noise pollution environmental phenomenon also becomes increasingly conspicuous.Expert thinks, automobile is noise pollution to the harm that environmental protection is maximum.The size of automobile noise weighs the important indicator of car mass level.
Therefore, the control of automobile noise is also an important topic of World Auto Industry.
Tyre noise is one of main sound source of automobile noise, and how overcoming the impact of environmental factor, accurately utilize microphone to measure the noise of car cover generation, improve the impact of tyre noise on internal car noise further, is control internal car noise effective way.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and be arranged in semianechoic room that turn between hub can microphone position, the Car cover noise testing microphone stationary installation that test result stability is higher of multi-faceted free assignment test car cover noise.
According to technical scheme provided by the invention, described Car cover noise testing microphone stationary installation, column is fixed with at the upper surface of base, cross bar is fixed with in the top ends of column, cross bar is fixed with the mounting rod in circular arc, the xsect of mounting rod is circular, and the two ends of mounting rod are fixed in the corresponding end of cross bar, and mounting rod is provided with microphone dop.
The height of described column is 0.15 ~ 0.25m.
Described mounting rod is semi-circular arc.
The diameter of described mounting rod is 0.3 ~ 0.5m.
The axis of described column and the axis of cross bar are vertical setting, and the top ends of column is fixed on the medium position of cross bar.
Utilize the noise that microphone measurement mechanism test carriage cover produces accurate stable of the present invention, and the position of the multi-faceted free adjustment microphone of energy, use flexible, easy for installation, greatly improve efficiency and the dirigibility of test.
Accompanying drawing explanation
Fig. 1 is stereographic map of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
This Car cover noise testing microphone stationary installation, column 2 is fixed with at the upper surface of base 1, cross bar 3 is fixed with in the top ends of column 2, cross bar 3 is fixed with the mounting rod 4 in circular arc, the xsect of mounting rod 4 is circular, the two ends of mounting rod 4 are fixed in the corresponding end of cross bar 3, and mounting rod 4 is slidably fitted with one or more than one microphone dop 5, and microphone dop 5 can move freely and sense of rotation on mounting rod 4; When microphone dop 5 is used in test, microphone is installed.
The height of described column 2 is 0.15 ~ 0.25m.
Described mounting rod 4 is semi-circular arc.
The diameter of described mounting rod 4 is 0.3 ~ 0.5m.
The axis of described column 2 and the axis of cross bar 3 are vertical setting, and the top ends of column 2 is fixed on the medium position of cross bar 3.
Described mounting rod 4 is installed one or more can being free to slide and rotatable microphone dop 5, according to test needs, the number of installation microphone dop 5, position and direction can be determined.
Car cover noise testing microphone stationary installation of the present invention is applicable to semianechoic room and turns testing tire noise between hub, utilize in anechoic room and turn hub test tire and make an uproar and can overcome the interference of surrounding enviroment, the noise signal simultaneously recorded is relatively stable, consistance is better.But when utilizing microphone testing tire noise in the past, on vehicle body, often fix microphone test tire make an uproar, but the noise signal signal to noise ratio (S/N ratio) of the method test is poor, it is comparatively large that the signal recorded is subject to body vibrations interference, not easily realizes multi-faceted free testing tire noise in addition on vehicle body.
Claims (5)
1. Car cover noise testing microphone stationary installation, it is characterized in that: be fixed with column (2) at the upper surface of base (1), cross bar (3) is fixed with in the top ends of column (2), cross bar (3) is fixed with the mounting rod (4) in circular arc, the xsect of mounting rod (4) is circular, the two ends of mounting rod (4) are fixed in the corresponding end of cross bar (3), and mounting rod (4) is provided with microphone dop (5).
2. Car cover noise testing microphone stationary installation as claimed in claim 1, is characterized in that: the height of described column (2) is 0.15 ~ 0.25m.
3. Car cover noise testing microphone stationary installation as claimed in claim 1, is characterized in that: described mounting rod (4) is semi-circular arc.
4. the Car cover noise testing microphone stationary installation as described in claim 1 or 3, is characterized in that: the diameter of described mounting rod (4) is 0.3 ~ 0.5m.
5. Car cover noise testing microphone stationary installation as claimed in claim 1, is characterized in that: the axis of described column (2) and the axis of cross bar (3) are vertical setting, and the top ends of column (2) is fixed on the medium position of cross bar (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202507.XA CN104776911A (en) | 2015-04-24 | 2015-04-24 | Microphone fixing device for saloon car exterior tire noise testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510202507.XA CN104776911A (en) | 2015-04-24 | 2015-04-24 | Microphone fixing device for saloon car exterior tire noise testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776911A true CN104776911A (en) | 2015-07-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510202507.XA Pending CN104776911A (en) | 2015-04-24 | 2015-04-24 | Microphone fixing device for saloon car exterior tire noise testing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776911A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398182A (en) * | 2018-01-25 | 2018-08-14 | 珠海格力电器股份有限公司 | Noise detecting system and noise measuring method |
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| US1975283A (en) * | 1932-12-31 | 1934-10-02 | United Res Corp | Sound recording |
| JP2001020848A (en) * | 1999-07-02 | 2001-01-23 | Mitsubishi Heavy Ind Ltd | Blade generating noise measuring device |
| CN2428774Y (en) * | 1999-12-08 | 2001-05-02 | 中国科学院武汉物理与数学研究所 | Supersonic scanning-inspection positioning device for elbow of pipeline |
| CN202066585U (en) * | 2011-03-14 | 2011-12-07 | 浙江吉利汽车研究院有限公司 | Sound sensor support for in-vehicle noise detection |
| CN202351252U (en) * | 2011-11-15 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Fixing bracket of speed measuring sensor |
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| CN203824644U (en) * | 2014-05-13 | 2014-09-10 | 珠海格力电器股份有限公司 | Sound power level testing tool |
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| CN204065026U (en) * | 2014-10-08 | 2014-12-31 | 宁波拓普集团股份有限公司 | For the microphone holder of material sound transmission loss test |
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Patent Citations (9)
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| US1975283A (en) * | 1932-12-31 | 1934-10-02 | United Res Corp | Sound recording |
| JP2001020848A (en) * | 1999-07-02 | 2001-01-23 | Mitsubishi Heavy Ind Ltd | Blade generating noise measuring device |
| CN2428774Y (en) * | 1999-12-08 | 2001-05-02 | 中国科学院武汉物理与数学研究所 | Supersonic scanning-inspection positioning device for elbow of pipeline |
| CN202066585U (en) * | 2011-03-14 | 2011-12-07 | 浙江吉利汽车研究院有限公司 | Sound sensor support for in-vehicle noise detection |
| CN202351252U (en) * | 2011-11-15 | 2012-07-25 | 浙江吉利汽车研究院有限公司 | Fixing bracket of speed measuring sensor |
| CN102853901A (en) * | 2012-09-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Device and method for testing automobile exhaust tail pipe noise |
| CN203824644U (en) * | 2014-05-13 | 2014-09-10 | 珠海格力电器股份有限公司 | Sound power level testing tool |
| CN203965037U (en) * | 2014-07-04 | 2014-11-26 | 无锡吉兴汽车声学部件科技有限公司 | Many microphones stationary installation for car load acoustical testing |
| CN204065026U (en) * | 2014-10-08 | 2014-12-31 | 宁波拓普集团股份有限公司 | For the microphone holder of material sound transmission loss test |
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| 朱振华等: "半消声室内轮胎噪声测试方法研究", 《轮胎工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398182A (en) * | 2018-01-25 | 2018-08-14 | 珠海格力电器股份有限公司 | Noise detecting system and noise measuring method |
| CN108398182B (en) * | 2018-01-25 | 2020-01-10 | 珠海格力电器股份有限公司 | Noise detection system and noise detection method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150715 |
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| RJ01 | Rejection of invention patent application after publication |