CN204165643U - The hand-held array that a kind of applicable internal car noise identifing source is measured - Google Patents
The hand-held array that a kind of applicable internal car noise identifing source is measured Download PDFInfo
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- CN204165643U CN204165643U CN201420095856.7U CN201420095856U CN204165643U CN 204165643 U CN204165643 U CN 204165643U CN 201420095856 U CN201420095856 U CN 201420095856U CN 204165643 U CN204165643 U CN 204165643U
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- 238000005259 measurement Methods 0.000 claims abstract description 10
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- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000001093 holography Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
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- 206010038743 Restlessness Diseases 0.000 description 1
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Abstract
The utility model relates to the hand-held array that a kind of applicable internal car noise identifing source is measured, and this array comprises array main frame, handle, microphone array; The isometric support column of at least three distributions in polygon is installed in described array main frame front, and the end of support column is installed rubber blanket and formed feet.When measuring internal car noise source, by microphone array towards region to be measured, keep each feet contact measurement surface, carry out data acquisition, can ensure that in measuring process, microphone array and measured surface form the consistance of distance, thus improve the accuracy of test result.Particularly each support column can be made up of a cylinder or multiple cylinder, can be adjusted the distance on microphone array and surface to be measured, thus adapt to the test of narrow regions noise source in car by the length of adjustment support column.
Description
Technical field
The utility model belongs to noise sources identification field, is related specifically to the hand-held array of a kind of applicable internal car noise identifing source measurement based near field acoustic holography.
Background technology
Vehicle interior sound field is through multiple reflections, and direct sound wave forms reverberant field, and the internal car noise identifing source technology in conjunction with acoustics, acoustics signal processing that developed recently gets up mainly contains Wave beam forming and Nearfield acoustic holography.Internal car noise identifing source based on beam-forming technology adopts spherical microphone array usually, better to the Noise Sources Identification effect of medium, high frequency in car.When the speed of a motor vehicle is less than 120km/h, during internal car noise composition mainly concentrates on, low frequency part, Nearfield acoustic holography in, the recognition effect of low frequency is better.
Hand-held microphone array can be used for the internal car noise identifing source based near field acoustic holography.Because interior space is little, complex structure, corner angle are many and irregular, measured zone uneven surface, the microphone array of common unadjustable handle angle cannot meet the different measuring angle of each measured zone in car in use, especially the measuring position below instrument panel, near brake pedal, makes the identified region in internal car noise source limited; The reverse reconstruction of near field acoustic holography belongs to acoustics inverse problem, the phase place that the mismatch of microphone position is brought and amplitude error can by inverse Green function exponentially form amplify, have a strong impact on the result of Noise Sources Identification, when the common hand-held microphone array not with feet is listed in measurement, rely on the stability of hand-held very difficult guarantee array manifold position, be also difficult to the consistance ensureing microphone array and each measured zone surface distance.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of hand-held array ensureing that microphone and measured surface are measured apart from conforming applicable internal car noise identifing source when measuring.
In order to solve the problems of the technologies described above, the hand-held array that applicable internal car noise identifing source of the present utility model is measured comprises array main frame, handle, microphone array; Characterized by further comprising the isometric support column of at least three distributions in polygon that array main frame front is installed.
Described each support column is made up of at least one cylinder.
The cylinder length of each support column of described formation is equal or not etc.
Described handle is made up of portion of the handle and coupling part, and it is hinged that locking knob is passed through in portion of the handle and coupling part.
The utility model also comprises acoustic absorbant and at least three pillars; Each pillar is the back side of polygon distributing installation at array main frame, and acoustic absorbant is fixed on pillar.
Described each pillar is formed by connecting by least two cylinders.
The cylinder length of each pillar of described formation is equal or not etc.
With microphone through hole and microphone jig on described array main frame, each microphone through hole and microphone jig form via-hole array; The each microphone jig in the front of array main frame is installed a microphone and forms microphone array.
The beneficial effects of the utility model:
1, the support column that the front installation at least three of described array main frame is isometric, when measuring internal car noise source, by microphone array towards region to be measured, keep each feet contact measurement surface, carry out data acquisition, can ensure that in measuring process, microphone array and measured surface form the consistance of distance, thus improve the accuracy of test result.Particularly each support column is made up of a cylinder or multiple cylinder, can be adjusted the distance on microphone array and surface to be measured, thus adapt to the test of narrow regions noise source in car by the length of adjustment support column.
2, the edge of one end of described handle and array main frame is hinged by locking knob, the hand-held angle adjustable of handle, all hand-held angle can be regulated according to use needs in different measuring positions, and locked by locking knob, conveniently can carry out Noise Sources Identification measurement to most of measured zone in the car complex region such as comprising below instrument panel, near brake pedal.
3, in the front of array main frame, individual layer microphone array is installed, the noise source from surface to be measured is measured; At the back side of array main frame, by multiple pillar, fixing acoustic absorbant is installed, direct absorption is from the noise of array dorsal part incidence, thus filter out background noise, relative double-decker array, decrease at double microphone and number adopt the prerequisite of number of channels under internal car noise source is tested, the requirement of experiment of internal car noise source electricity can be met.
4, multiple cylinder is utilized to connect into pillar, can by the adjustment specification of cylinder and the length of quantity regulating pillar, thus the acoustic absorbant of different-thickness can be installed according to signal to noise ratio (S/N ratio), at more than frequency 100Hz, signal to noise ratio (S/N ratio) is greater than the environment of 0dB, and namely noise source signal to be measured can reach under being not less than the environment of ground unrest and Noise Sources Identification result closely in free field environment.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the hand-held array front elevation that applicable internal car noise identifing source of the present utility model is measured.
Fig. 2 is the hand-held array vertical view that applicable internal car noise identifing source of the present utility model is measured.
Fig. 3 is hand-held array microphone axonometric drawing and acoustic absorbant scheme of installation.
Fig. 4 is that pillar and prop liner are connected schematic diagram.
Wherein: 1, array main frame 2, handle 21, portion of the handle 22, coupling part 3, locking knob 4, prop liner 5, pillar 51, long size cylinder 52, short specification cylinder 6, support column 7, rubber blanket 81,82, packing ring 9, cable clamping apparatus 10, microphone through hole 11, acoustic absorbant 12, microphone jig 13, bolt
Embodiment
As shown in Figure 1,2,3, 4, the hand-held array that applicable internal car noise identifing source of the present utility model is measured comprises array main frame 1, handle 2, microphone array, at least three support columns 6 and pillar 5, acoustic absorbant 11.With microphone through hole 10 on described array main frame 1, each microphone through hole 10 forms the via-hole array of 8 × 8; With microphone through hole 10 and microphone jig 12 on array main frame 1, each microphone through hole 10 and microphone jig 12 form via-hole array; The each microphone jig 12 in the front of array main frame 1 is installed a microphone and forms microphone array.Four support columns 6 are fixedly mounted on corner, the front place of array main frame 1, and each support column 6 is made up of a long size cylinder, and the end of each long size cylinder is installed rubber blanket 7 and formed feet.The back side of array main frame 1 is mounted with cable clamping apparatus 9, for fixing microphone cable.The right side of array main frame 1 is provided with handle 2.Handle 2 is made up of portion of the handle 21 and coupling part 22, portion of the handle 21 is hinged by locking knob 3 with coupling part 22, unclamp locking knob 3, portion of the handle 21 can be selected to be adjusted to suitable angle within the scope of 0 ~ 270 °, stowed position is 0 °, is then screwed by locking knob 3 and the angle of portion of the handle 21 can be fixed.Corner, back side place fixed installation prop liner 4, four pillars 5 of array main frame 1 are arranged on four prop liners 4 respectively.Acoustic absorbant 11 is fixed on four pillars 5; Each pillar 5 is threaded connection by two long size cylinders 51 and multiple short specification cylinder 52 and combines, and utilizes bolt 13 to install packing ring 81 at 5 tops of pillar, installs packing ring 82 in the junction of two long size cylinders 51; Acoustic absorbant 11 is fixed between packing ring 81,82.
Described each pillar 5 can also be formed by connecting by a long size cylinder and multiple short specification cylinder, or is formed by connecting by multiple short specification cylinder; Can adopt between each cylinder and be threaded, also can adopt other connected modes such as axle sleeve connection, snap-in connection.
Claims (8)
1. a hand-held array for applicable internal car noise identifing source measurement, comprises array main frame (1), handle (2), microphone array; Characterized by further comprising the isometric support column (6) of at least three distributions in polygon that array main frame (1) front is installed.
2. the hand-held array of applicable internal car noise identifing source measurement according to claim 1, is characterized in that described each support column (6) is made up of at least one cylinder.
3. the hand-held array measured of applicable internal car noise identifing source according to claim 2, is characterized in that the cylinder length of each support column of described formation (6) is equal or not etc.
4. the hand-held array of applicable internal car noise identifing source measurement according to claim 1, it is characterized in that described handle (2) is made up of portion of the handle (21) and coupling part (22), portion of the handle (21) is hinged by locking knob (3) with coupling part (22).
5. the hand-held array of applicable internal car noise identifing source measurement according to claim 1, characterized by further comprising acoustic absorbant (11) and at least three pillars (5); Each pillar (5) is in the back side of polygon distributing installation in array main frame (1), and acoustic absorbant (11) is fixed on pillar (5).
6. the hand-held array of applicable internal car noise identifing source measurement according to claim 5, is characterized in that described each pillar (5) is formed by connecting by least two cylinders.
7. the hand-held array measured of applicable internal car noise identifing source according to claim 6, is characterized in that the cylinder length of each pillar of described formation (5) is equal or not etc.
8. the hand-held array that the applicable internal car noise identifing source according to claim 2,4 or 5 is measured, it is characterized in that with microphone through hole (10) and microphone jig (12) on described array main frame (1), each microphone through hole (10) and microphone jig (12) form via-hole array; In the front of array main frame (1), each microphone jig (12) upper installation microphone forms microphone array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095856.7U CN204165643U (en) | 2014-03-04 | 2014-03-04 | The hand-held array that a kind of applicable internal car noise identifing source is measured |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420095856.7U CN204165643U (en) | 2014-03-04 | 2014-03-04 | The hand-held array that a kind of applicable internal car noise identifing source is measured |
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| CN204165643U true CN204165643U (en) | 2015-02-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500828A (en) * | 2016-09-29 | 2017-03-15 | 中国人民解放军军械工程学院 | A kind of method that noise profile in driving cabin is voluntarily equipped in hand microphone array and its test |
| CN106625717A (en) * | 2017-01-23 | 2017-05-10 | 中国第汽车股份有限公司 | Numerical control scanning type robot for automobile noise source recognition |
| WO2019184892A1 (en) * | 2018-03-26 | 2019-10-03 | 京东方科技集团股份有限公司 | Test box |
| CN110530602A (en) * | 2019-08-05 | 2019-12-03 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of Combined microphone array apparatus |
| CN111257912A (en) * | 2020-03-07 | 2020-06-09 | 智博兴(武汉)测绘有限公司 | Self-positioning handheld GPS land measuring device |
-
2014
- 2014-03-04 CN CN201420095856.7U patent/CN204165643U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106500828A (en) * | 2016-09-29 | 2017-03-15 | 中国人民解放军军械工程学院 | A kind of method that noise profile in driving cabin is voluntarily equipped in hand microphone array and its test |
| CN106625717A (en) * | 2017-01-23 | 2017-05-10 | 中国第汽车股份有限公司 | Numerical control scanning type robot for automobile noise source recognition |
| WO2019184892A1 (en) * | 2018-03-26 | 2019-10-03 | 京东方科技集团股份有限公司 | Test box |
| CN110530602A (en) * | 2019-08-05 | 2019-12-03 | 中国航空工业集团公司哈尔滨空气动力研究所 | A kind of Combined microphone array apparatus |
| CN111257912A (en) * | 2020-03-07 | 2020-06-09 | 智博兴(武汉)测绘有限公司 | Self-positioning handheld GPS land measuring device |
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Granted publication date: 20150218 |
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