CN103364760B - Large aperture three-dimensional array structure - Google Patents
Large aperture three-dimensional array structure Download PDFInfo
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- CN103364760B CN103364760B CN201210169879.3A CN201210169879A CN103364760B CN 103364760 B CN103364760 B CN 103364760B CN 201210169879 A CN201210169879 A CN 201210169879A CN 103364760 B CN103364760 B CN 103364760B
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Abstract
The invention relates to a large aperture three-dimensional array structure, which comprises a center support platform and a plurality of round rods (11), wherein the round rods (11) and the center support platform are fixedly assembled, the center support platform comprises a camera base (7), a front end plate (6), a cylinder (4) and a platform installation base (1), which are sleeved coaxially sequentially, the cylinder (4) is connected to the platform installation base (1) through a pin at the front end, the other end of the cylinder (4) is in cup joint with the front end plate (6), the camera base (7) is sleeved on the front end plate (6); array bases (10) are arranged on each round rod (11), and each round rod (11) is arranged on the platform installation base (1) through a round rod connecting piece (2) and a round rod support piece (3) on the platform installation base (1), and maintains a certain angle with the center line of the center support platform. The structure has a simple structure, the array aperture is increased, the measuring frequency lower limit is expanded, and improvement of the detection positioning precision is facilitated.
Description
Technical field
The present invention relates to acoustic measurement field, specifically, the present invention relates to a kind of large aperture solid array structure.
Background technology
Array structure refers to the acoustic sounding device combined according to certain plane or solid geometry distribution of shapes by multiple microphone, this device lays several acoustic sounding unit according to certain rule and receives sound field acoustic signal, by auditory localization algorithm, multi-acoustical is synchronously located, determine the spatial information of sound field, and wanted signal and Background suppression Noise and Interference source can be strengthened, improve the positioning precision of sound source and the rejection ability to irrelevant signal, may be used for the distribution situation measuring sound source or sound field, determine sound source position, follow the tracks of the sound source of movement, this device can be applicable in acoustic measurement field, as the noise measurement of machinery and equipment, the tracking of moving target, the Quick Measurement location of moving target noise, the fields such as machine noise fault diagnosis, large aperture solid array structure is particularly suitable for the measurement and positioning of large-scale target and low-frequency sound source.
Conventional acoustic sounding array structure mainly comprises linear array structure, planar array structure, solid array structure.Linear array structure refers to that all array element is located along the same line, the array structure form that array element distributes according to certain rule, can only determine the position angle of acoustic target, cannot determine the elevation angle of sound source, cannot differentiate which side that sound source is positioned at straight line.Planar array structure refers to the upper array structure form that all array element is in the same plane, and array element can distribute according to different rules in the plane, can the position angle of localization of sound source and the elevation angle, but cannot carry out space three-dimensional location.Solid array structure is the solid array form according to the distribution of certain rule on three dimensions, can position three-dimensional sound source, and wide-aperture array format can be designed, make the spatial resolution of array higher, the survey frequency lower limit of array is lower, and can differentiate the sound source of fore-and-aft direction.Utilize solid array structure, three dimensions gathers acoustic signal, according to specific algorithm, computational analysis is carried out to space sound field, obtain the distribution situation of space sound field, and merge with the time-frequency image of front end camera collection and superpose, obtain auditory localization figure intuitively.The auditory localization that three-dimensional array meta structure is particularly suitable for low frequency general objective is measured.
The detection performance of the array element distribution pair array of solid array structure has important impact.Array not only can be made to have higher spatial resolution according to the formation of proper form distribution, and there is higher Sidelobe Suppression ability, wave interference of coming for unexpected direction has stronger rejection ability, thus obtain more accurately positioning result, undesired signal can not be obtained the positioning result of mistake as sound source simultaneously.The three-dimensional array meta structure of function admirable not only can accurately measure the position of sound source, obtains the echo signal of high s/n ratio, and can effectively reduce virtual source effect, obtains auditory localization result accurately.Three-dimensional array meta structure is particularly suitable for the outer field measurement of low frequency general objective, and size is comparatively large, but requirement is firm, it is portable, reliable easily to install.
Existing large aperture solid array adopts 3 stocks or 5 stock forms, 3 stock forms that star battle array as German Acoustic Camera adopts, always have 36 array elements, and every root stock cannot dismantle folding installation, therefore, array element aperture size, bar and array element number all can be restricted; On each bar, the distribution of array element is identical; The signal wire of each bar pools together outer being exposed, and is easy to impaired.The star array of B & K company of Denmark adopts the form of 5 bars, and on every root bar, array element is by identical rule distribution, and single pole cannot accomplish dismounting or folding installation.Therefore, the single bar of the solid array of existing popularization cannot be dismantled or fold, cause three-dimensional array array body larger, cause the inconvenience in use, installation and transport, result in and must do some in array battle array body size and use, transporter portability, steadiness and compromise, limit the large aperture advantage of solid array.In addition, in installation, existing solid array structure is that stock composition battle array body is directly installed on support, is mainly used in the target noise looked up in angle and measures, under looking squarely or overlooking situation, can there is center of gravity unbalance, cause installing built on the sand.
Therefore, the aperture of array is less, and transport is installed constant, and on every root bar, array element distribution is consistent, causes the performance of array not reach best.
Summary of the invention
The object of the invention is to, for overcoming the shortcoming of existing array element structure in detection accuracy, virtual source effect, mounting structure and stability etc. and deficiency, thus providing a kind of array element structure with large aperture, high detection accuracy, low survey frequency lower limit.
For solving the problems of the technologies described above, a kind of large aperture solid array structure that technical scheme of the present invention provides, it is characterized in that, this large aperture solid array structure comprises: central supported platform and some round bars 11, described some round bars 11 and the fixing assembling of central supported platform;
Described central supported platform comprises camera pedestal 7 coaxially sheathed successively, front end plate 6, cylinder 4 and platform mounting base 1, described cylinder 4 is connected with stage+module pedestal by front end latch, end plate 6 before the socket of cylinder 4 other end, described camera pedestal 7 is socketed on front end plate 6;
Described round bar 11 is provided with array element pedestal 10, and this round bar 11 is connected on stage+module pedestal 1 by the round bar web member 2 on stage+module pedestal 1 and round bar support member 3, and maintains certain angle with support platform center line.Described camera pedestal 7, for fixing camera.
One as technique scheme is improved, and described round bar 11 is connected and fixed by three quarter butts and forms, so that assembling and transport.Connected by spring between three described quarter butts, undertaken assembling by telescopic spring between adjacent two quarter butts and fold.Or the diameter of three described quarter butts is successively decreased by adterminal first quarter butt of the 3rd quarter butt on top, is connected, with ease of assembly and dismounting between adjacent two quarter butts by sleeve fit.
As another improvement of technique scheme, described array element pedestal 10 distributing according to three-dimensional helix rule on some round bars 11.
As another improvement of technique scheme, described round bar 11 is 8, and described array element pedestal 10 installs 8 on every root round bar 11, and in eight star solid array structures, totally 64 array element pedestals 10 determine according to optimized algorithm, and coordinate is as follows:
As another improvement of said method, described front end plate 6 is circumferentially provided with some connecting pins 5, and this connecting pin 5 is socketed with one end of support bar 8, and the other end of support bar 8 supports and is fixed in the middle part of round bar 11.Support bar 8 adjusts gravity balance effect together with central supported platform, strengthens installing firmly.
Improve as the also a kind of of said method, described array element pedestal 10, for fixing array element, described array element pedestal 10 is provided with installs inlet wire circular hole, is connected up by this circular hole, leads to round bar 11 inside.Described round bar 11 internal placement array element signals line, and gather via the end of round bar 11 and enter cylinder 4, the hidden cylinder interior of array element signals line, ensures that cabling is clean and succinctly will circuit be made because of error to pull apart simultaneously.Described round bar 11 adopts plastics, aluminium alloy, carbon fiber, stainless steel or glass-reinforced plastic material to make.
The array element structure with large aperture, high detection accuracy, low survey frequency lower limit of the present invention, camera is installed by camera web member in described support platform front end, rear end is by round bar web member 2 and round bar 11 link support round bar 11, web member circular hole is angled, ensure that round bar 11 is kept at an angle after accurately installing; Design wide-aperture array structure, by different syndetons, large-scale array can be dismantled as less volume, facilitate installing/dismounting, the aperture of array element structure can be expanded simultaneously further.Element position on every root round bar 11 is different, and lays according to certain rule, makes array have higher spatial resolution.
Compared with existing formation, a kind of large aperture of the present invention three-dimensional array meta structure has the following advantages:
1, the present invention's convenience simple and reliable for structure, round bar 11 is adopted to be connected with support platform, detachable assembling, every root round bar 11 is made up of shorter three quarter butts, middle to be connected by spring fastenings 12, can folding extension, and by the support of support bar 8, this form expands the aperture of array, and for providing possibility in expanded matrix aperture further future.
2, structure of the present invention, the element position on every root round bar 11 is all not identical, further increases the positioning performance of array.
In a word, structure of the present invention is simple, increases array aperture, has expanded survey frequency lower limit, and is conducive to improving Detection location precision.
Accompanying drawing explanation
Below, describe embodiments of the invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 is large aperture of the present invention solid array structure front schematic view;
Fig. 2 is large aperture of the present invention solid array texture edge schematic diagram;
Fig. 3 is the mounting structure schematic diagram of the central supported platform of large aperture of the present invention solid array;
Fig. 4 is the structural representation of large aperture of the present invention solid array round bar folded state;
Fig. 5 is the structural representation after the solid array foldable integral of large aperture of the present invention;
Fig. 6 is the element position schematic diagram that large aperture of the present invention solid array distributes according to three-dimensional helix rule;
Fig. 7 is the distribution schematic diagram of element position on three dimensions in Fig. 6;
Fig. 8 is the wave beam response directional diagram of the large aperture solid array of another optimum embodiment of the present invention.
Accompanying drawing identifies:
1, stage+module pedestal 2, round bar web member 3, round bar support member
4, cylinder 5, connecting pin 6, front end plate
7, camera pedestal 8, support bar 9, quarter butt
10, array element pedestal 11, round bar 12, spring fastenings
13, microphone
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As depicted in figs. 1 and 2, the large aperture three-dimensional array meta structure of the present embodiment comprises: central supported platform and some round bars 11, described some round bars 11 and the fixing assembling of central supported platform; Wherein, round bar 11 material adopts materials such as can adopting plastics, aluminium alloy, stainless steel, fiberglass to make, the hidden cylinder interior of array element signals line, ensures that cabling is clean and succinctly will circuit be made because of error to pull apart simultaneously.
As shown in Figure 3, the relation that is linked and packed of support platform and round bar 11, the first paragraph quarter butt of round bar 11 is by round bar web member 2 connecting platform mounting base 1, and ensure that round bar 11 and support platform center line maintain certain angle by round bar support member 3, cylinder 4 is connected with mounting base by front end latch, end plate 6 before the socket of cylinder 4 other end, and camera pedestal 7 is socketed on front end plate 6, connecting pin 5 and support bar 8 are socketed, and the support bar other end connects second segment quarter butt and supports round bar 11.
As shown in Figure 4 and Figure 5, round bar 11 is fixedly assembled by spring fastenings 12 by 3 sections of quarter butts 9, quarter butt 9 is provided with array element pedestal 10, for installing microphone 13 on array element pedestal 10.
Or can be that every bar rigidity round bar 11 is made up of three sections of quarter butts, be successively decreased by top terminad diameter, diameter 15mm ~ 24mm, be connected by sleeve fit, with ease of assembly and dismounting between adjacent two quarter butts.
As shown in Figure 6 and Figure 7, on the round bar 11 with the three-dimensional large aperture three-dimensional array meta structure of space orientation ability of the present embodiment, array element pedestal coordinate distributes according to three-dimensional helix rule.
As optimum embodiment, as shown in table 1, round bar 11 number with the three-dimensional large aperture three-dimensional array meta structure of space orientation ability of the present embodiment elects 8 as, on every bar rigidity round bar 11, array element pedestal number elects 8 as, the array element pedestal regularity of distribution of every bar round bar 11 is inconsistent, as follows according to optimized algorithm determination array element pedestal coordinate:
Table 1
As shown in Figure 8, be the wave beam response directional diagram of the large aperture solid array of the above-mentioned optimum embodiment of the present invention.This figure confirms further, and based on structural advantage of the present invention, the present embodiment is positioned at the rigidity round bar 11 that the support platform at center and 8 are positioned at central platform periphery, and total diameter can reach 3.6 meters, is conducive to expansion survey frequency lower limit.64 unit are according to the distribution of certain rule altogether, have optimum detection performance, ensure that element position accurately improves array measurement precision and interference rejection capability, one-piece construction assembling for convenience detach, install firm.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a large aperture solid array structure, is characterized in that, this large aperture solid array structure comprises: central supported platform and some round bars (11), described some round bars (11) and the fixing assembling of central supported platform;
Described central supported platform comprises camera pedestal (7) coaxially sheathed successively, front end plate (6), cylinder (4) and platform mounting base (1), described cylinder (4) is connected with stage+module pedestal by front end latch, end plate (6) before the socket of cylinder (4) other end, described camera pedestal (7) is socketed on front end plate (6);
Described round bar (11) is provided with array element pedestal (10), this round bar (11) is connected on stage+module pedestal (1) by the round bar web member (2) on stage+module pedestal (1) and round bar support member (3), and maintains certain angle with support platform center line;
Described round bar (11) is connected and fixed by three quarter butts and forms, so that assembling and transport;
Connected by spring between three described quarter butts, undertaken assembling by telescopic spring between adjacent two quarter butts and fold;
Described front end plate (6) is circumferentially provided with some connecting pins (5), this connecting pin (5) is socketed with one end of support bar (8), and the other end of support bar (8) supports and is fixed on round bar (11) middle part.
2. large aperture according to claim 1 solid array structure, is characterized in that, the diameter of three described quarter butts is successively decreased by adterminal first quarter butt of the 3rd quarter butt on top, is connected, with ease of assembly and dismounting between adjacent two quarter butts by sleeve fit.
3. large aperture according to claim 1 solid array structure, is characterized in that, described array element pedestal (10) is according to three-dimensional helix rule distribution on some round bars (11).
4. large aperture according to claim 1 solid array structure, it is characterized in that, described round bar (11) is 8, upper distribution 8 the array element pedestals (10) of every root round bar (11), in eight star solid array structures, totally 64 array element pedestals (10), as follows by optimized algorithm determination array element pedestal coordinate:
5. the large aperture solid array structure according to any one of Claims 1 to 4, it is characterized in that, described array element pedestal (10), for fixing array element, described array element pedestal (10) is provided with installs inlet wire circular hole, connected up by this circular hole, lead to round bar (11) inside.
6. the large aperture solid array structure according to any one of Claims 1 to 4, it is characterized in that, described round bar (11) internal placement array element signals line, and gather via the end of round bar (11) and enter cylinder (4), the hidden cylinder interior of array element signals line, ensures that cabling is clean and succinctly will circuit be made because of error to pull apart simultaneously.
7. the large aperture solid array structure according to any one of Claims 1 to 4, is characterized in that, described round bar (11) adopts plastics, aluminium alloy, carbon fiber, stainless steel or glass-reinforced plastic material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210169879.3A CN103364760B (en) | 2012-04-01 | 2012-05-29 | Large aperture three-dimensional array structure |
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| CN2012100966643 | 2012-04-01 | ||
| CN201210096664.3 | 2012-04-01 | ||
| CN201210096664 | 2012-04-01 | ||
| CN201210169879.3A CN103364760B (en) | 2012-04-01 | 2012-05-29 | Large aperture three-dimensional array structure |
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| CN103364760A CN103364760A (en) | 2013-10-23 |
| CN103364760B true CN103364760B (en) | 2015-04-22 |
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| CN201210169879.3A Active CN103364760B (en) | 2012-04-01 | 2012-05-29 | Large aperture three-dimensional array structure |
| CN 201220244753 Withdrawn - After Issue CN202735507U (en) | 2012-04-01 | 2012-05-29 | Wide-aperture stereo array structure |
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| CN103364760B (en) * | 2012-04-01 | 2015-04-22 | 中科声相（天津）科技有限公司 | Large aperture three-dimensional array structure |
| CN105828259B (en) * | 2016-03-10 | 2019-01-08 | 浙江工业大学 | A kind of umbrella shape can recombinate three-dimensional microphone array |
| CN110244264B (en) * | 2019-06-26 | 2021-04-13 | 北京航天控制仪器研究所 | Acoustic sensor array structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865510A2 (en) * | 2006-05-15 | 2007-12-12 | Roke Manor Research Limited | An audio recording system |
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN202735507U (en) * | 2012-04-01 | 2013-02-13 | 中科声相（天津）科技有限公司 | Wide-aperture stereo array structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100936587B1 (en) * | 2007-12-10 | 2010-01-13 | 한국항공우주연구원 | 3-d microphone array structure |
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2012
- 2012-05-29 CN CN201210169879.3A patent/CN103364760B/en active Active
- 2012-05-29 CN CN 201220244753 patent/CN202735507U/en not_active Withdrawn - After Issue
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1865510A2 (en) * | 2006-05-15 | 2007-12-12 | Roke Manor Research Limited | An audio recording system |
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN202735507U (en) * | 2012-04-01 | 2013-02-13 | 中科声相（天津）科技有限公司 | Wide-aperture stereo array structure |
Non-Patent Citations (1)
| Title |
|---|
| 室内声学测量中传声器阵列的特点及其引用;赵跃英等;《声学技术》;20091231;第28卷(第6期);705－709 * |
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| CN202735507U (en) | 2013-02-13 |
| CN103364760A (en) | 2013-10-23 |
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