CN201718024U - Plane spiral microphone array - Google Patents
Plane spiral microphone array Download PDFInfo
- Publication number
- CN201718024U CN201718024U CN2010201888065U CN201020188806U CN201718024U CN 201718024 U CN201718024 U CN 201718024U CN 2010201888065 U CN2010201888065 U CN 2010201888065U CN 201020188806 U CN201020188806 U CN 201020188806U CN 201718024 U CN201718024 U CN 201718024U
- Authority
- CN
- China
- Prior art keywords
- array
- planar spiral
- microphone
- rigid
- array element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model relates to a plane spiral microphone array which comprises an array camera arranged in the central position, an array main body, and a plurality of microphones mounted on the array main body, wherein, the array main body is provided with a plurality of plane spiral rigid spokes. The microphone array is characterized in that the microphones are distributed at crossing nodes of an n multiplied n square-formed line, which are evenly formed on the plane at intervals; n equals to an integral multiple of 15 or 21; eight plane spiral rigid spokes are provided, and eight array elements are arranged on each plane spiral rigid spoke; and the 64 array elements are distributed on the crossing nodes of a 15 multiplied 15 square-formed line. The microphone array has the advantages of simple and reliable structure, small amount of support arms connected to each node, little influence to the sound field, facilitation of detection accuracy improvement, fully rigid structure, firmness, reliability, avoidance of errors caused by effective hole diameter changes due to soft connection, large amount of array element microphones, high Information collection capacity, high positioning accuracy and large positioning range.
Description
Technical field
The utility model relates to the microphone array in the acoustic measurement field, and specifically, the utility model relates to a kind of planar spiral microphone array.
Background technology
Microphone array is a kind of acoustic sounding device that a plurality of microphones are formed according to certain geometry distributed combination, this device binding signal process software can be to many sound sources synchronous detecting, can measure the spatial information of sound source, and can carry out the processing that signal strengthens and suppress ambient interferences to the ad-hoc location sound source, can improve the pick-up capability of equipment to target sound, also can be used for following the tracks of the moving process of sound source, this device appears in the major applications of modern acoustics fields of measurement, such as hearing aids, TeleConference Bridge, computer terminals etc. are used to realize that voice strengthen, auditory localization, acoustic imaging detects, stage fixed point sound picks up, remote interview, the machine noise failure diagnosis, functions such as remote monitoring monitoring.
In acoustic sounding equipment, use straight line profile microphone array, spherical profile microphone array or plane distribution type microphone array usually.Array element on the linear microphone array is positioned on the line, has multiple distribution form but can only be that half plane on boundary positions to array place straight line.Planar shaped microphone array, array element are positioned on the plane, have multiple distribution form, can position target on whole plane, and can be that the half space on boundary positions also to plane, array place, but can not be to whole space orientation.Wherein, planar spiral microphone array is a kind of structure by plane distribution, and its microphone unit is positioned at the node on a series of helixes, has multiple distribution form.The snail array is by measuring the spatial sound image pattern, and with battle array on the doubling of the image of taking of the video frequency pick-up head installed of central point show, be used for reflecting that the position of measured sound source and measured object concerns.Planar spiral microphone array can to the dead ahead to two-dimensional space have good detectivity, be particularly useful for directional detection.
The rule that the detection performance of snail battle array and array element distribute is closely related, the spiral battle array of plane distribution form is all inequality to the resolution and the detection accuracy of sound field imaging measurement, the snail battle array of function admirable not only can accurately measure the position of sound source, obtain the echo signal of high s/n ratio, and, effectively reduce the virtual source effect to a certain extent.
Existing planar spiral array is general with a plurality of spirality radiation items compositions, and array element quantity has 24,32,48,60,128 etc.48 yuan of spiral battle arrays as Korea S SM Instruments company have 6 screw rods, 8 array elements of arranging by identical rule on every bar; The array element of 35 yuan of spiral battle arrays of popularity company is divided into 7 groups, and every group has 5 array elements to be distributed on the helical.
But, because array structure has certain influence to sound field, the pole of array is more little, duty ratio in the battle array body plane is more little, influence to acoustic field is just more little, so the snail array will reduce the support bar width on the one hand, reduce pole quantity, and require the holding wire of array to narrow down to the degree that does not influence sound field.
On the other hand, also the claimed structure rigidity is good for the snail array, could guarantee that the detection performance of array is stable.Structural instability will cause sensor position uncertainties bigger, makes the effective aperture of planar spiral microphone array change easily, influences detection accuracy.
The utility model content
Therefore, the purpose of this utility model provides a kind of detection accuracy height, little, the constitutionally stable planar spiral microphone array of virtual source effect.
For realizing above-mentioned utility model purpose, a kind of planar spiral microphone array that the utility model provides, comprise: be located at array camera, the array main body of center and be installed in some microphones on the described array main body, described array main body is the rigid spoke of some planar spirals; It is characterized in that described microphone is distributed near the crossover node of evenly spaced n * n groined type lines on this plane, n gets 15 or 21 integral multiple.Theoretically, general as long as the public node of the big portion in this array of use is made adaptability revision to the minority node, also can obtain technique effect of the present invention.
The rigid spoke of described planar spiral is 8, and 8 array elements are arranged on every rigid spoke, and described 64 array elements are distributed near the crossover node of 15 * 15 groined type lines.As preferably, the rigid spoke of described 8 planar spirals is the rigid spoke of two groups of different helicals, and uniformly at intervals, the normalization coordinate data table of 64 nodes is:
| The array element ordinal number | X? | Y? | The array element ordinal number | X? | Y? | The array element ordinal number | X? | Y? |
| O (initial point) | 0? | 0? | E22? | 4? | -4? | E44? | -5? | -1? |
| E1? | 0? | 0? | E23? | 4? | -5? | E45? | -6? | 0? |
| E2? | 0? | 2? | E24? | 4? | -6? | E46? | -6? | 1? |
| E3? | 0? | 3? | E25? | 3? | -7? | E47? | -7? | 2? |
| E4? | 1? | 4? | E26? | 1? | -1? | E48? | -7? | 3? |
| E5? | 3? | 4? | E27? | 2? | -2? | E49? | -2? | 0? |
| E6? | 4? | 4? | E28? | 2? | -4? | E50? | -3? | 0? |
| E7? | 5? | 4? | E29? | 1? | -5? | E51? | -4? | 1? |
| E8? | 6? | 4? | E30? | 0? | -6? | E52? | -4? | 3? |
| E9? | 7? | 3? | E31? | -1? | -6? | E53? | -4? | 4? |
| E10? | 1? | 1? | E32? | -2? | -7? | E54? | -4? | 5? |
| E11? | 2? | 2? | E33? | 0? | -2? | E55? | -4? | 6? |
| E12? | 4? | 2? | E34? | 0? | -3? | E56? | -3? | 7? |
| E13? | 5? | 1? | E35? | -1? | -4? | E57? | -1? | 1? |
| E14? | 6? | 0? | E36? | -3? | -4? | E58? | -2? | 2? |
| E15? | 6? | -1? | E37? | -4? | -4? | E59? | -2? | 4? |
| E16? | 7? | -2? | E38? | -5? | -4? | E60? | -1? | 5? |
| E17? | 7? | -3? | E39? | -6? | -4? | E61? | 0? | 6? |
| E18? | 2? | 0? | E40? | -7? | -3? | E62? | 1? | 6? |
| E19? | 3? | 0? | E41? | -1? | -1? | E63? | 2? | 7? |
| E20? | 4? | -1? | E42? | -2? | -2? | E64? | 3? | 7? |
| E21? | 4? | -3? | E43? | -4? | -2? | ? | ? | ? |
The rigid spoke of described planar spiral is 8, and 8 array elements are arranged on every rigid spoke, and described 64 array elements are distributed near the crossover node of 21 * 21 groined type lines.As preferably, the rigid spoke of described 8 planar spirals is the rigid spoke of two groups of different helicals, and uniformly at intervals, the normalization coordinate data table of 64 nodes is:
| Array element indicates | The array element ordinal number | X(cm)? | Y(cm)? | Array element indicates | The array element ordinal number | X(cm)? | Y(cm)? |
| K11? | O (initial point) | 0? | 0? | I9? | E33? | -1? | -2? |
| M13? | E1? | -2? | 2? | H8? | E34? | 3? | -3? |
| N14? | E2? | -3? | 3? | H6? | E35? | 3? | -5? |
| N16? | E3? | -3? | 5? | J4? | E36? | 1? | -7? |
| L18? | E4? | -1? | 7? | K3? | E37? | 0? | -8? |
| K19? | E5? | 0? | 8? | L2? | E38? | -1? | -9? |
| J20? | E6? | 1? | 9? | M1? | E39? | -2? | -10? |
| I21? | E7? | 2? | 10? | O1? | E40? | -4? | -10? |
| G21? | E8? | 4? | 10? | K9? | E41? | 0? | -2? |
| K13? | E9? | 0? | 2? | K7? | E42? | 0? | -4? |
| K15? | E10? | 0? | 4? | M5? | E43? | -2? | -6? |
| I17? | E11? | 2? | 6? | O5? | E44? | -4? | -6? |
| G17? | E12? | 4? | 6? | Q5? | E45? | -6? | -6? |
| E17? | E13? | 6? | 6? | R6? | E46? | -7? | -5? |
| D16? | E14? | 7? | 5? | T6? | E47? | -9? | -5? |
| B16? | E15? | 9? | 5? | U7? | E48? | -10? | -4? |
| A15? | E16? | 10? | 4? | M9? | E49? | -2? | -2? |
| I13? | E17? | -1? | 2? | N8? | E50? | -3? | -3? |
| H14? | E18? | 3? | 3? | P8? | E51? | -5? | -3? |
| F14? | E19? | 5? | 3? | R10? | E52? | -7? | -1? |
| D12? | E20? | 7? | 1? | S11? | E53? | -8? | 0? |
| C11? | E21? | 8? | 0? | T12? | E54? | -9? | 1? |
| B10? | E22? | 9? | -1? | U13? | E55? | -10? | 2? |
| A9? | E23? | 10? | -2? | U15? | E56? | -10? | 4? |
| A7? | E24? | 10? | -4? | M11? | E57? | -2? | 0? |
| I11? | E25? | -1? | 0? | O11? | E58? | -4? | 0? |
| G11? | E26? | 4? | 0? | Q13? | E59? | -6? | 2? |
| E9? | E27? | 6? | -2? | Q15? | E60? | -6? | 4? |
| E7? | E28? | 6? | -4? | Q17? | E61? | -6? | 6? |
| E5? | E29? | 6? | -6? | P18? | E62? | -5? | 7? |
| F4? | E30? | 5? | -7? | P20? | E63? | -5? | 9? |
| F2? | E31? | 5? | -9? | O21? | E64? | -4? | 10? |
| G1? | E32? | 4? | -10? | ? | ? | ? | ? |
The spoke width of described planar spiral rigid support is 9mm～15mm, is preferably 12mm.
Described rigid spoke 2 has array element installing hole 6, and this array element installing hole 6 is provided with installs inlet wire breach 5; Described microphone 1 and corresponding preamplifier 7 be by being threaded togather, sheathed installation insulating sleeve 8 on the described preamplifier 7, and described array element is installed insulating sleeve 8 and is arranged in the array element installing hole 6 on the rigid spoke 2; The rear end of described preamplifier 7 is installed back seat 9 by screw thread and array element and is connected.
Be set with hurricane globe 10 on the described microphone 1.
Described preamplifier 7 is by holding wire and line concentration plug 4 be flexible coupling signal condition and Acquisition Instrument 3, and the holding wire of described preamplifier 7 enters described array element installing hole 6 from inlet wire breach 5 is installed; Described holding wire and line concentration plug 4 are inserted on the base of signal condition and Acquisition Instrument 3.
Described array camera 13 is installed in the center of described array main body by screw.
Described array main body comprises: array folding part 11 and array main element 12 are screwed between array folding part 11 and the array main element 12.
The rear of described array main element 12 is fixed with support bar 14, and described signal condition and Acquisition Instrument 3 are installed on the other end of this support bar 14.
Compared with prior art, the virtual source effect of a kind of planar spiral microphone array of the present utility model is very little; In addition, also have following technique effect:
1, the utility model is simple and reliable for structure, and the support arm quantity that each node place connects is few, and is little to the sound field influence, helps improving detection accuracy.
2, embodiment medium-height trestles more of the present utility model adopt full rigid structure, and are solid and reliable, and the effective aperture of having avoided causing owing to being flexible coupling changes the error of bringing.
3, structure of the present utility model can adopt the ramuscule boom, helps further improving detection accuracy.
In a word, the utility model is simple and reliable for structure, and the support arm quantity that each node place connects is few, and is little to the sound field influence, helps improving detection accuracy; The utility model adopts full rigid structure, and is solid and reliable, and the effective aperture of having avoided causing owing to being flexible coupling changes the error of bringing; The array element microphone quantity that the utility model comprised is many, and the information gathering amount is big, the positioning accuracy height, and orientation range is wide.
Description of drawings
Below, describe embodiment of the present utility model in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 be the array element of snail battle array and helical distribute concern schematic diagram.
Fig. 2 is each array element distribution rule schematic diagram of snail battle array.
Fig. 3 is a snail array scheme of installation.
Fig. 4 is signal condition and Acquisition Instrument and line concentration plug corresponding relation schematic diagram.
Fig. 5 is the schematic diagram that concerns of radiation of array rigidity and array element mounting hole site.
Fig. 6 is each exploded sketch that the array element microphone unit is installed to the array element mounting hole site.
Fig. 7 a is the structural representation of preamplifier on the array element;
Fig. 7 b is the output lead-in wire definition schematic diagram of preamplifier.
Fig. 8 is the decomposition chart that array element is installed insulating sleeve and array element installation back seat.
Fig. 9 is the structure chart of the hurricane globe on the array element.
Figure 10 is the array overall structure figure of embodiment 1.
Figure 11 is 4 array folding means structure charts of the collapsible array of embodiment 1.
Figure 12 is the array main element structure chart of the collapsible array of embodiment 1.
Figure 13 is the superimposed back battle array structure chart of the collapsible array of embodiment 1.
Figure 14 is the collapsible array structure schematic diagram of embodiment 2.
Figure 15 is the superimposed back battle array structural representation of the collapsible array of embodiment 2.
Figure 16 is that embodiment 3 array elements are distributed in 64 yuan of helical array on 21 * 21 crossover nodes.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done to describe further.
Present embodiment is 64 yuan of planar spiral microphone arrays, shown in Fig. 3～10, comprising: microphone 1, array rigid spoke 2, signal condition and Acquisition Instrument 3, line concentration plug 4, inlet wire breach 5 is installed, array element installing hole 6, preamplifier 7, array element is installed insulating sleeve 8, and array element is installed back seat 9, hurricane globe 10, array folding part 11, array main element 12, array camera 13, support bar 14.
As illustrated in fig. 1 and 2, the rigid support of described planar spiral has 64 nodes, and all nodes are distributed in a kind of special coordinates place.These nodes are arranged in laterally evenly spaced 15 lines and the vertically elite node in evenly spaced 15 line crosspoints, and selected node is distributed on 8 helicals, and 8 array elements are arranged on every helical.Its normalization coordinate is as shown in table 1, and the length of side of the lateral profile of array is 15 * 15.
Table 1 (snail battle array normalization coordinate data table)
| The array element ordinal number | X? | Y? | The array element ordinal number | X? | Y? |
| O (initial point) | 0? | 0? | E33? | 0? | -2? |
| E1? | 0? | 0? | E34? | 0? | -3? |
| E2? | 0? | 2? | E35? | -1? | -4? |
| E3? | 0? | 3? | E36? | -3? | -4? |
| E4? | 1? | 4? | E37? | -4? | -4? |
| E5? | 3? | 4? | E38? | -5? | -4? |
| E6? | 4? | 4? | E39? | -6? | -4? |
| E7? | 5? | 4? | E40? | -7? | -3? |
| E8? | 6? | 4? | E41? | -1? | -1? |
| E9? | 7? | 3? | E42? | -2? | -2? |
| E10? | 1? | 1? | E43? | -4? | -2? |
| E11? | 2? | 2? | E44? | -5? | -1? |
| E12? | 4? | 2? | E45? | -6? | 0? |
| E13? | 5? | 1? | E46? | -6? | 1? |
| E14? | 6? | 0? | E47? | -7? | 2? |
| E15? | 6? | -1? | E48? | -7? | 3? |
| E16? | 7? | -2? | E49? | -2? | 0? |
| E17? | 7? | -3? | E50? | -3? | 0? |
| E18? | 2? | 0? | E51? | -4? | 1? |
| E19? | 3? | 0? | E52? | -4? | 3? |
| E20? | 4? | -1? | E53? | -4? | 4? |
| E21? | 4? | -3? | E54? | -4? | 5? |
| E22? | 4? | -4? | E55? | -4? | 6? |
| E23? | 4? | -5? | E56? | -3? | 7? |
| E24? | 4? | -6? | E57? | -1? | 1? |
| E25? | 3? | -7? | E58? | -2? | 2? |
| E26? | 1? | -1? | E59? | -2? | 4? |
| E27? | 2? | -2? | E60? | -1? | 5? |
| E28? | 2? | -4? | E61? | 0? | 6? |
| E29? | 1? | -5? | E62? | 1? | 6? |
| E30? | 0? | -6? | E63? | 2? | 7? |
| E31? | -1? | -6? | E64? | 3? | 7? |
| E32? | -2? | -7? | ? | ? | ? |
The change ratio just can obtain the node coordinate of the snail array of different size, and table 2 is length of side 1m snail battle array coordinate data tables; Table 3 is length of side 2m snail battle array coordinate data tables.
Table 2 (length of side 1m snail battle array coordinate data table)
| The array element ordinal number | X(mm)? | Y(mm)? | The array element ordinal number | X(mm)? | Y(mm)? |
| O (initial point) | 0? | 0? | E33? | 0? | -140? |
| E1? | 0? | 140? | E34? | 0? | -210? |
| E2? | 0? | 210? | E35? | -70? | -280? |
| E3? | 70? | 280? | E36? | -210? | -280? |
| E4? | 210? | 280? | E37? | -280? | -280? |
| E5? | 280? | 280? | E38? | -350? | -280? |
| E6? | 350? | 280? | E39? | -420? | -280? |
| E7? | 420? | 280? | E40? | -490? | -210? |
| E8? | 490? | 210? | E41? | -70? | -70? |
| E9? | 70? | 70? | E42? | -140? | -140? |
| E10? | 140? | 140? | E43? | -280? | -140? |
| E11? | 280? | 140? | E44? | -350? | -70? |
| E12? | 350? | 70? | E45? | -420? | 0? |
| E13? | 420? | 0? | E46? | -420? | 70? |
| E14? | 420? | -70? | E47? | -490? | 140? |
| E15? | 490? | -140? | E48? | -490? | 210? |
| E16? | 490? | -210? | E49? | -140? | 0? |
| E17? | 140? | 0? | E50? | -210? | 0? |
| E18? | 210? | 0? | E51? | -280? | 70? |
| E19? | 280? | -70? | E52? | -280? | 210? |
| E20? | 280? | -210? | E53? | -280? | 280? |
| E21? | 280? | -280? | E54? | -280? | 350? |
| E22? | 280? | -350? | E55? | -280? | 420? |
| E23? | 280? | -420? | E56? | -210? | 490? |
| E24? | 210? | -490? | E57? | -70? | 70? |
| E25? | 70? | -70? | E58? | -140? | 140? |
| E26? | 140? | -140? | E59? | -140? | 280? |
| E27? | 140? | -280? | E60? | -70? | 350? |
| E28? | 70? | -350? | E61? | 0? | 420? |
| E29? | 0? | -420? | E62? | 70? | 420? |
| E30? | -70? | -420? | E63? | 140? | 490? |
| E31? | -140? | -490? | E64? | 210? | 490? |
| E32? | -210? | -490? | ? | ? | ? |
Table 3 (length of side 2m snail battle array coordinate data table)
| The array element ordinal number | X(mm)? | Y(mm)? | The array element ordinal number | X(mm)? | Y(mm)? |
| O (initial point) | 0? | 0? | E33? | 0? | -250? |
| E1? | 0? | 250? | E34? | 0? | -375? |
| E2? | 0? | 375? | E35? | -125? | -500? |
| E3? | 125? | 500? | E36? | -375? | -500? |
| E4? | 375? | 500? | E37? | -500? | -500? |
| E5? | 500? | 500? | E38? | -625? | -500? |
| E6? | 625? | 500? | E39? | -750? | -500? |
| E7? | 750? | 500? | E40? | -875? | -375? |
| E8? | 875? | 375? | E41? | -125? | -125? |
| E9? | 125? | 125? | E42? | -250? | -250? |
| E10? | 250? | 250? | E43? | -500? | -250? |
| E11? | 500? | 250? | E44? | -625? | -125? |
| E12? | 625? | 125? | E45? | -750? | 0? |
| E13? | 750? | 0? | E46? | -750? | 125? |
| E14? | 750? | -125? | E47? | -875? | 250? |
| E15? | 875? | -250? | E48? | -875? | 375? |
| E16? | 875? | -375? | E49? | -250? | 0? |
| E17? | 250? | 0? | E50? | -375? | 0? |
| E18? | 375? | 0? | E51? | -500? | 125? |
| E19? | 500? | -125? | E52? | -500? | 375? |
| E20? | 500? | -375? | E53? | -500? | 500? |
| E21? | 500? | -500? | E54? | -500? | 625? |
| E22? | 500? | -625? | E55? | -500? | 750? |
| E23? | 500? | -750? | E56? | -375? | 875? |
| E24? | 375? | -875? | E57? | -125? | 125? |
| E25? | 125? | -125? | E58? | -250? | 250? |
| E26? | 250? | -250? | E59? | -250? | 500? |
| E27? | 250? | -500? | E60? | -125? | 625? |
| E28? | 125? | -625? | E61? | 0? | 750? |
| E29? | 0? | -750? | E62? | 125? | 750? |
| E30? | -125? | -750? | E63? | 250? | 875? |
| E31? | -250? | -875? | E64? | 375? | 875? |
| E32? | -375? | -875? | ? | ? | ? |
Change the pore size that lines width at interval just can change array, but the version of array is constant, and the quantity of array rigid spoke is constant.Use rigid connecting rod and described planar spiral array main body to fix, array is played firm supporting role.
Enlarge the spacing of equally distributed 15 * 15 groined type line, just can obtain having enlarged the planar spiral array of size, spacing is set at 70mm, just can obtain length of side 980mm * 980mm, the spiral battle array of diameter 1.066m, each array element coordinate is shown in subordinate list 2, spacing is set at 125mm, just can obtain length of side 1.75m * 1.75m, the spiral battle array of diameter 1.904m, each array element coordinate is shown in subordinate list 3.
In this example, described microphone 1 and described preamplifier 7 are by being threaded togather, and by behind the described array element installation insulating sleeve 8, pass the described array element installing hole 6 on the described array rigid spoke 2, described preamplifier 7 is installed back seat 9 by screw thread and described array element and is connected, and described hurricane globe 10 is sleeved on the described microphone 1.Described preamplifier 7 is flexible coupling by holding wire and line concentration plug 4, the holding wire of described preamplifier 7 enters described array element installing hole 6 from inlet wire breach 5 is installed, described line concentration plug 4 is inserted on the base of described signal condition and Acquisition Instrument 3, described array camera 13 is installed in the center of described array main body 12 by screw, and described array folding part 11 is screwed with array main element 12.
Also comprise support bar 14, described support bar 14 is positioned at the rear of described planar spiral array main element 12, and the center by rigid connecting rod and plane, array element place is connected and fixed.
In this example, the width of described planar spiral array rigid spoke 2 is about 12mm, can adopt material such as aluminium alloy, stainless steel, fiberglass.Described microphone is 1/4 inch or 1/2 inch microphone.
Shown in Fig. 3 and 4, described signal condition and Acquisition Instrument 3 are installed on the described planar spiral rigid supporting rod 14, described signal condition and Acquisition Instrument 3 are signal acquisition circuit plates 24 of a signal processor 22 or a high-speed, high precision, comprising: instrument box 21, line concentration mouth 23, USB interface 25 and supply socket 26; 4 pairs of described signal condition and Acquisition Instrument 3 and described line concentration plugs are flexible coupling by many signal line and described array element microphone 1 after inserting and being connected.
Shown in Figure 10～13, it is a kind of by a quadrate array main element and four planar spiral microphone arrays that the array folding means is synthetic that present embodiment provides.The planar spiral microphone array of present embodiment comprises critical pieces such as planar spiral array rigid spoke, support bar, microphone, camera, signal acquisition process instrument.
Present embodiment has designed the microphone installing hole on each element position, described installing hole is fixedlyed connected with preamplifier by array element installation insulating sleeve, and the installation of microphone is convenient in the design of this mount pad.
For the planar spiral microphone array that cooperates present embodiment carries out data acquisition, corresponding line concentration plug box and signal condition and Acquisition Instrument box have also been designed.The holding wire of each array element (being microphone) all is fixedly attached on the line concentration plug along the radiation item arm back side independently, and then is inserted on the socket of signal condition and Acquisition Instrument box.Described signal condition and Acquisition Instrument are the DSP signal processor, carry out signal output by USB interface, by the control computer signal processor are controlled, thereby are formed a complete system.
The microphone installing hole of present embodiment on each element position all is positioned at the outside of rigid spoke, and this structure has guaranteed that the rigidity of array main body frame does not reduce, as shown in Figure 5.
The erection sequence of the microphone of present embodiment on each element position is, microphone is threaded with preamplifier, the base of preamplifier is inserted in array element and installs in the insulating sleeve, and the array element installing hole on the insertion array rigid spoke node, array element is installed the opposite side insertion of back seat from the array element installing hole, and be connected with the whorl of base of preamplifier, as shown in Figure 6.Array element is installed insulating sleeve and array element and back seat is installed is that insulating material makes, and can guarantee that the signal ground of array element is transferred to line concentration head end independently, has avoided in advance the danger on ground altogether, as shown in Figure 9.
The microphone of present embodiment on each element position is installed on the preamplifier, the front end of preamplifier has conduction better elastic contact 31, can contact well with the output signal end of microphone, the bottom of preamplifier is the hollow stud 32 of a M5, output signal line 33 is passed at the center, screw thread is used to install and fix, shown in Fig. 7 and 8.
The microphone head of present embodiment on each element position installed spherical hurricane globe, and hurricane globe has the ability of good elimination wind noise, simultaneously with the no-float of microphone, as shown in Figure 9.
The planar spiral microphone array of present embodiment is simple in structure, can guarantee that each array element microphone all is positioned on the same plane, as shown in figure 10.The present embodiment elementary cell is to be made of enough rigidity and enough thin rigid spoke (as Metallic rod), and spoke uses rigid structure fully, has strengthened the rigidity of planar spiral microphone array, can form firm system, has improved the reliability of system.The microphone mount pad of present embodiment is positioned on the node of planar spiral microphone array, and the effective aperture of the planar spiral microphone array of this installation is big, the detection accuracy height.
Under the prerequisite that guarantees enough rigidity, the array design of present embodiment has become folding, and the array main element is a square structure, inner each spoke is connected to each other, and is at the bottom of the simple in structure and duty ratio, little to the influence of sound field, 32 array elements are arranged, as shown in figure 12 on it.The array folding part is a simple imperial shape structure, is in order to promote rigidity and the influence that reduces sound field, 8 array elements to be arranged, as shown in figure 11 on it.Four array folding means are installed just to have formed around array main element symmetry and are finished array, as shown in figure 10.
It is collapsible that the array folding means of present embodiment inwardly turns over 180 degree backs, stacks packing with the array main element, and reduced size is convenient to transportation, as shown in figure 13.
Present embodiment and embodiment 1 basically identical, the difference part is that the version of present embodiment array main element 12 and array folding part 11 is simpler, rounded and scroll is shown in Figure 14 and 15.This structural change the spoke quantity of planar spiral microphone array, but the distributing position of array element transducer relation is just the same with embodiment 1, promptly the array element coordinate is constant.
As shown in figure 16, the rigid support of described planar spiral has 64 nodes, and all nodes are distributed in a kind of special coordinates place.These nodes are arranged in laterally evenly spaced 21 lines and the vertically elite node in evenly spaced 21 line crosspoints, and selected node is distributed on 8 helicals, and 8 array elements are arranged on every helical.Its normalization coordinate is as shown in table 4.
Table 4 (array element is distributed in the spiral battle array coordinate on 21 * 21 crossover nodes)
| Array element indicates | The array element ordinal number | X(cm)? | Y(cm)? | Array element indicates | The array element ordinal number | X(cm)? | Y(cm)? |
| K11? | O (initial point) | 0? | 0? | I9? | E33? | -1? | -2? |
| M13? | E1? | -2? | 2? | H8? | E34? | 3? | -3? |
| N14? | E2? | -3? | 3? | H6? | E35? | 3? | -5? |
| N16? | E3? | -3? | 5? | J4? | E36? | 1? | -7? |
| L18? | E4? | -1? | 7? | K3? | E37? | 0? | -8? |
| K19? | E5? | 0? | 8? | L2? | E38? | -1? | -9? |
| J20? | E6? | 1? | 9? | M1? | E39? | -2? | -10? |
| I21? | E7? | 2? | 10? | O1? | E40? | -4? | -10? |
| G21? | E8? | 4? | 10? | K9? | E41? | 0? | -2? |
| K13? | E9? | 0? | 2? | K7? | E42? | 0? | -4? |
| K15? | E10? | 0? | 4? | M5? | E43? | -2? | -6? |
| I17? | E11? | 2? | 6? | O5? | E44? | -4? | -6? |
| G17? | E12? | 4? | 6? | Q5? | E45? | -6? | -6? |
| E17? | E13? | 6? | 6? | R6? | E46? | -7? | -5? |
| D16? | E14? | 7? | 5? | T6? | E47? | -9? | -5? |
| B16? | E15? | 9? | 5? | U7? | E48? | -10? | -4? |
| A15? | E16? | 10? | 4? | M9? | E49? | -2? | -2? |
| I13? | E17? | -1? | 2? | N8? | E50? | -3? | -3? |
| H14? | E18? | 3? | 3? | P8? | E51? | -5? | -3? |
| F14? | E19? | 5? | 3? | R10? | E52? | -7? | -1? |
| D12? | E20? | 7? | 1? | S11? | E53? | -8? | 0? |
| C11? | E21? | 8? | 0? | T12? | E54? | -9? | 1? |
| B10? | E22? | 9? | -1? | U13? | E55? | -10? | 2? |
| A9? | E23? | 10? | -2? | U15? | E56? | -10? | 4? |
| A7? | E24? | 10? | -4? | M11? | E57? | -2? | 0? |
| I11? | E25? | -1? | 0? | O11? | E58? | -4? | 0? |
| G11? | E26? | 4? | 0? | Q13? | E59? | -6? | 2? |
| E9? | E27? | 6? | -2? | Q15? | E60? | -6? | 4? |
| E7? | E28? | 6? | -4? | Q17? | E61? | -6? | 6? |
| E5? | E29? | 6? | -6? | P18? | E62? | -5? | 7? |
| F4? | E30? | 5? | -7? | P20? | E63? | -5? | 9? |
| F2? | E31? | 5? | -9? | O21? | E64? | -4? | 10? |
| G1? | E32? | 4? | -10? | ? | ? | ? | ? |
It should be noted last that above embodiment is only unrestricted in order to the explanation the technical solution of the utility model.Although the utility model is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, the technical solution of the utility model is made amendment or is equal to replacement, the spirit and scope that do not break away from technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (12)
1. planar spiral microphone array comprises: be located at array camera, the array main body of center and be installed in some microphones on the described array main body, described array main body is the rigid spoke of some planar spirals; It is characterized in that described microphone is distributed near the crossover node of evenly spaced n * n groined type lines on this plane, n gets 15 or 21 integral multiple.
2. planar spiral microphone array according to claim 1, it is characterized in that, the rigid spoke of described planar spiral is 8, and 8 array elements are arranged on every rigid spoke, and described 64 array elements are distributed near the crossover node of 15 * 15 groined type lines.
3. planar spiral microphone array according to claim 2 is characterized in that, the rigid spoke of described 8 planar spirals is the rigid spoke of two groups of different helicals, and uniformly at intervals, the normalization coordinate data table of 64 nodes is:
。
4. planar spiral microphone array according to claim 1, it is characterized in that, the rigid spoke of described planar spiral is 8, and 8 array elements are arranged on every rigid spoke, and described 64 array elements are distributed near the crossover node of 21 * 21 groined type lines.
5. planar spiral microphone array according to claim 4 is characterized in that, the rigid spoke of described 8 planar spirals is the rigid spoke of two groups of different helicals, and uniformly at intervals, the normalization coordinate data table of 64 nodes is:
。
6. planar spiral microphone array according to claim 1 is characterized in that, the spoke width of described planar spiral rigid support is 9mm～15mm, is preferably 12mm.
7. planar spiral microphone array according to claim 1 is characterized in that described rigid spoke has the array element installing hole, and this array element installing hole is provided with installs the inlet wire breach;
Described microphone and corresponding preamplifier be by being threaded togather, sheathed installation insulating sleeve on the described preamplifier, and described array element is installed insulating sleeve and is arranged in the array element installing hole on the rigid spoke; The rear end of described preamplifier is installed back seat by screw thread and array element and is connected.
8. planar spiral microphone array according to claim 7 is characterized in that, is set with hurricane globe on the described microphone.
9. planar spiral microphone array according to claim 7, it is characterized in that, described preamplifier is flexible coupling by holding wire and line concentration plug and is inserted on signal condition and the Acquisition Instrument, and the holding wire of described preamplifier enters described array element installing hole from the inlet wire breach is installed; Described holding wire and line concentration plug are inserted on the base of signal condition and Acquisition Instrument.
10. planar spiral microphone array according to claim 1 is characterized in that, described array camera is installed in the center of described array main body by screw.
11. planar spiral microphone array according to claim 1 is characterized in that, described array main body comprises: array folding means and array main element are screwed between array folding means and the array main element.
12. planar spiral microphone array according to claim 11 is characterized in that, the rear of described array main element is fixed with support bar, and described signal condition and Acquisition Instrument are installed on the other end of this support bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201888065U CN201718024U (en) | 2010-05-07 | 2010-05-07 | Plane spiral microphone array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201888065U CN201718024U (en) | 2010-05-07 | 2010-05-07 | Plane spiral microphone array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201718024U true CN201718024U (en) | 2011-01-19 |
Family
ID=43464033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201888065U Expired - Lifetime CN201718024U (en) | 2010-05-07 | 2010-05-07 | Plane spiral microphone array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201718024U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN103024625A (en) * | 2012-09-03 | 2013-04-03 | SMInstrument株式会社 | High precision acoustic senseing device and acoustic camera using microphone array |
| CN103227971A (en) * | 2013-01-08 | 2013-07-31 | 中科声相（天津）科技有限公司 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
| CN105657587A (en) * | 2014-11-11 | 2016-06-08 | 沈阳新松机器人自动化股份有限公司 | Microphone array component |
| CN112739997A (en) * | 2018-07-24 | 2021-04-30 | 弗兰克公司 | Systems and methods for detachable and attachable acoustic imaging sensors |
| CN112731290A (en) * | 2020-12-30 | 2021-04-30 | 中国航天空气动力技术研究院 | Be applied to microphone installation device that unmanned aerial vehicle near field detected |
-
2010
- 2010-05-07 CN CN2010201888065U patent/CN201718024U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN101860776B (en) * | 2010-05-07 | 2013-08-21 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN103024625A (en) * | 2012-09-03 | 2013-04-03 | SMInstrument株式会社 | High precision acoustic senseing device and acoustic camera using microphone array |
| CN103227971A (en) * | 2013-01-08 | 2013-07-31 | 中科声相（天津）科技有限公司 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
| CN103227971B (en) * | 2013-01-08 | 2014-10-29 | 中科声相（天津）科技有限公司 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
| CN105657587A (en) * | 2014-11-11 | 2016-06-08 | 沈阳新松机器人自动化股份有限公司 | Microphone array component |
| CN112739997A (en) * | 2018-07-24 | 2021-04-30 | 弗兰克公司 | Systems and methods for detachable and attachable acoustic imaging sensors |
| CN112731290A (en) * | 2020-12-30 | 2021-04-30 | 中国航天空气动力技术研究院 | Be applied to microphone installation device that unmanned aerial vehicle near field detected |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101860776B (en) | Planar spiral microphone array | |
| CN201718024U (en) | Plane spiral microphone array | |
| Yu et al. | Near-field head-related transfer-function measurement and database of human subjects | |
| EP2657716A3 (en) | Electromagnetic measurement system | |
| Nair et al. | Vocalizations of wild Asian elephants (Elephas maximus): structural classification and social context | |
| US20190004124A1 (en) | High-precision imaging and detecting device for detecting small defect of pipeline by helical magnetic matrix | |
| CN101158677A (en) | Cell electric physiology integrated chip and preparation method | |
| KR100936587B1 (en) | 3-d microphone array structure | |
| CN104127244A (en) | Passive type infrared light reflection small ball and use method thereof | |
| Zena-Giménez et al. | A flexible multiring concentric electrode for non-invasive identification of intestinal slow Waves | |
| Zhang et al. | Design, characterization, and performance of woven fabric electrodes for electrocardiogram signal monitoring | |
| CN102599907A (en) | Electrical impedance tomography method based on gridding displacement model | |
| Zhu et al. | An experimental study on transfer function estimation using acoustic modelling and singular value decomposition | |
| Tu et al. | Washable and Flexible Screen-Printed Ag/AgCl Electrode on Textiles for ECG Monitoring | |
| CN205539197U (en) | Based on little resistance measurement system of singlechip | |
| US9658205B2 (en) | Electrode array for analyzing electrical characteristics of cell spheroid | |
| CN109009082A (en) | A kind of cardiac diagnosis lead system | |
| CN109683133B (en) | Single-sensor acoustic camera based on space folding acoustic metamaterial | |
| CN210664531U (en) | Breed and use humidity transducer's fixed knot to construct | |
| CN103364760A (en) | Large aperture three-dimensional array structure | |
| Masiero et al. | Design of a fast individual HRTF measurement system | |
| Jiang et al. | Self-contained high-SNR underwater acoustic signal acquisition node and synchronization sampling method for multiple distributed nodes | |
| Cengarle et al. | Comparison of anemometric probe and tetrahedral microphones for sound intensity measurements | |
| Maki et al. | Reducing individual differences in the external-ear transfer functions of the Mongolian gerbil | |
| Ibsen et al. | Spatial orientation of different frequencies within the echolocation beam of a Tursiops truncatus and Pseudorca crassidens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110119 Effective date of abandoning: 20130821 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110119 Effective date of abandoning: 20130821 |
|
| RGAV | Abandon patent right to avoid regrant |