CN103227971B - Multi-mode dimensional microphone array adopting two-way spiral distribution - Google Patents
Multi-mode dimensional microphone array adopting two-way spiral distribution Download PDFInfo
- Publication number
- CN103227971B CN103227971B CN201310006605.7A CN201310006605A CN103227971B CN 103227971 B CN103227971 B CN 103227971B CN 201310006605 A CN201310006605 A CN 201310006605A CN 103227971 B CN103227971 B CN 103227971B
- Authority
- CN
- China
- Prior art keywords
- array
- array element
- main frame
- flank
- microphone
- 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.)
- Active
Links
Abstract
The invention relates to a multi-mode dimensional microphone array adopting two-way spiral distribution, which is technically characterized in that the multi-mode dimensional microphone array comprises a main frame, flanks and array element nodes; the flanks are installed on the side edge of the main frame in a folding manner in the anteroposterior direction; the main frame and the flanks are combined through planar rigid supports; in addition, the array element nodes are installed on eight anti-clockwise rotation spirals and four clockwise rotation spirals, and are also installed at intersections of the eight anti-clockwise rotation spirals and the four clockwise rotation spirals, wherein the eight anti-clockwise rotation spirals and the four clockwise rotation spirals take a central point as a circle center. The flanks can form at least nine arrays that are stable and have excellent performances when being folded in the anteroposterior direction, array elements are distributed in a two-way spiral manner, coordinates of the array elements achieve high accuracy and are not easy to change, sound localization accuracy is high, and virtual images are small; the other eight modes of the arrays have certain three dimensional sound localization capacity except the first mode, and can be suitable for measuring equipment with different noise source distribution shapes; and meanwhile, the flanks are folded backwards so as to form a horizontal combination, and then are packed after being stacked and pressed with the main frame, so that the flanks are convenient to be installed in a packaging box and are convenient to carry and transport.
Description
Technical field
The invention belongs to acoustic measurement microphone array field, the multimode stereoscopic microphone array that especially a kind of bidirectional screw distributes.
Background technology
Microphone array to the acoustic image cross frequence lower limit of noise testing with without the virtual image measuring frequency upper limit, be the index of conflict, the former is that the resolution capability by array determines, microphone array can be told the low-limit frequency of two sound sources, its theoretical value is that wavelength corresponding to lower-frequency limit should be less than array aperture, the latter is that the minimum array element distance by array determines, be defined as the highest frequency that does not occur the virtual image in camera angular field of view, its theoretical value is that wavelength corresponding to upper frequency limit is not less than minimum spacing.Due to acoustic image separation, distinguishing rate lower limit is to be determined by the aperture of array, and be to be determined by the density of battle array upper sensor without virtual image upper frequency limit, thereby there are three inter-related problems: (1) is in order to reduce separable lower-frequency limit, need the aperture of expanded matrix, so array is done very large; (2) due to the limited amount of array upper sensor, after expanding aperture, the reduction of the closeness of transducer causes pitch enlargement, and then array is reduced the imaging measurement upper frequency limit of high-frequency sound, when measuring high frequency, easily occurs the virtual image; (3) before and after planar array is hard to tell, caused general snail battle array to be in use subject to a lot of limitations.All sensor array products, comprise Denmark B & K company pizza battle array at present, MON-SN type three ring arrays of Belgium LMS company, Germany GiFi company ring array, the snail battle array of Germany BBM company, the snail array of Germany Head Acoustic, the Nor848 planar array of Norway Nor Sonic company, the 48channelRing Array of U.S. Acoustic Camera company, the AcVs type battle array of France ACB company, the snail battle array of Korea S SM Instruments company, 48 yuan of screw stereo battle arrays of France CAE Inc., the snail battle array of Beijing popularity company and lattice framing battle array, the InSYS2010 type snail battle array of Acoustical Inst., Chinese Academy of Sciences, 8 * 8 planar rectangular battle arrays of Beijing Century Si Chuan acoustic technique Co., Ltd, 10 * 10 planar rectangular battle arrays of Zhanghe, Guangzhou company, 5 * 5 planar rectangular battle arrays of Beijing Orient vibration and noise research institute, 36 yuan of snail battle arrays of Beijing Shen Zhou Pu Hui company, the planar array spiral battle array experimental provision of Peking University, the rectangle battle array experimental provision of Tsing-Hua University, the ring array experimental provisions that western work is large etc. are plane formation product both at home and abroad, does not all accomplish both to have reduced under acoustic image cross frequence being limited to 200Hz, can make again to reach 20kHz without virtual image upper frequency limit.
US Patent No. 6473514B1 discloses a kind of folding equally distributed linear array, the whiplike structure of its similar more piece, and formation is simple, and positioning function is not strong, does not have multiple folding operating state yet, and folding is mainly for convenient transportation.WO2008/040991A3 discloses the array that a kind of spheric harmonic function method of reseptance that utilizes many sensors spatial folding to distribute obtains the accurate sound pressure level of space broadband sound field, the feature of this array is array element transducer non-directive, and array non-formation spatial gain necessarily can not realize the imaging of sound source is detected.
In sum, existing microphone array is all relatively-stationary form, there is no the variable three-dimensional microphone array of multi-mode, can not be simultaneously for the measurement of space two-dimensional sound field and three-dimensional sound field, takes into account the requirement that expands aperture and improve array element closeness.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of Stability Analysis of Structures, form is changeable, precision is high, measuring frequency wide ranges, have total space resolution capability, can obtain the multimode stereoscopic microphone array that the sonographic bidirectional screw of the different depth of field distributes.
The present invention solves its technical problem and takes following technical scheme to realize:
The multimode stereoscopic microphone array that a kind of bidirectional screw distributes, comprise main frame, flank and array element node, described flank can be arranged on main frame side front and back foldedly, described main frame and flank are planar rigidity holder combination, described array element node installation take on eight helicals that are rotated counterclockwise that central point is the center of circle, four helicals that turn clockwise and the crosspoint of two kinds of helicals on.
And the quantity of described array element node is 80, on every counterclockwise helical and every the helical that turns clockwise, all there are 8 array elements, all array element nodes are installed on the edge of planar rigidity support.
And, described array element node comprises array element microphone, array element base amplifier, array element installing insulating ring, array element installation locking swivel nut and array element signals line, array element microphone is arranged on array element base amplifier, this array element base amplifier is installed locking swivel nut by array element installing insulating ring and array element and is arranged in the installing hole that planar array rigid support is provided with, and the endoporus that described array element signals line is installed locking swivel nut through array element is drawn.
And the quantity of described flank is 1,2,3 or 4.
And, described flank is connected with main frame by three folding hinges, before being provided with, fold vertical columns and be connected with flank by folding rigid bracing on the planar array rigid support of main frame front side, folding vertical columns being connected with flank by folding rigid bracing after being provided with on the planar array rigid support of main frame rear side, the folding rigid bracing by different length makes flank and main frame be fixed as different angles with realization at least 9 array mode of operations.
And the center, front side of described main frame is provided with array camera, this array camera is by being arranged in the centre bore of main frame by camera installation sleeve.
And, on described array camera planar rigidity support around, be laid with four light compensating lamps.
And, a main supporting disk is installed by four centre posts in the back center position of described main frame, this main supporting disk is connected with the planar array rigid support of main frame by four oblique pull support bars, in the outside of main supporting disk, connect a threaded collar, in this threaded collar, be connected with loose joint, by this loose joint, connect a main stay pipe.
And described array element microphone is 1/4 inch or 1/2 inch of measuring microphone.
And the material of described planar array rigid support is aluminium alloy, stainless steel or fiberglass, or other can guarantee enough firm performance materials of array bracket.
Advantage of the present invention and good effect are:
1, this microphone array is classified as after a kind of rigid support width is less than 12mm open and flat and is the array that double helix distributes, the battle array body of the array of open and flat rear diameter 1m duty ratio planar only has 13%, the battle array body of open and flat rear diameter 2m array duty ratio planar only has 6%, therefore little of ignoring on the impact of acoustic field.On this basis, by folded array, can realize multiple multi-form array, realize the solid array of various modes, before and after both can having distinguished, can realize again the separable Measurement and analysis to high-frequency sound.
2, the position of the array element microphone of this microphone array have two kinds each other reverse helix distribute, be conducive to improve detection accuracy, reduce the virtual image.
3, this microphone array has nine kinds of above mode of operations, the array of each form has measurement advantage separately, open and flat shape mode of operation can be carried out two-dimentional acoustic image and be measured, the solid array pattern being folded to form, can carry out three-dimensional acoustic imaging and measure, can carry out axially accurately location to sound source.
4, the support of this microphone array adopts full rigid structure, and three folding hinges can guarantee that folding rear stabilized structure is reliable, have avoided formation error.
5, the flank of this microphone array folds back into after horizontal combination, stacks packing with main frame, and reduced size, is convenient to be installed in packing case, is convenient for carrying transportation.
Accompanying drawing explanation
Fig. 1 is positive blast distribution map of the present invention;
Fig. 2 is blast distribution map in the back side of the present invention;
Fig. 3 is the blast distribution map of array element node of the present invention;
Fig. 4 is that the installation of main frame of the present invention and flank is related to schematic diagram;
Fig. 5 is front view (a) and the rearview (b) of the first pattern of the present invention;
Fig. 6 is front view (a) and the rearview (b) of the second pattern of the present invention;
Fig. 7 is front view (a) and the rearview (b) of the third pattern of the present invention;
Fig. 8 is front view (a) and the rearview (b) of the 4th kind of pattern of the present invention;
Fig. 9 is front view (a) and the rearview (b) of the 5th kind of pattern of the present invention;
Figure 10 is front view (a) and the rearview (b) of the 6th kind of pattern of the present invention;
Figure 11 is front view (a) and the rearview (b) of the 7th kind of pattern of the present invention;
Figure 12 is front view (a) and the rearview (b) of the 8th kind of pattern of the present invention;
Figure 13 is front view (a) and the rearview (b) of the 9th kind of pattern of the present invention;
Figure 14 is array element and the helical distribution relation schematic diagram of the present invention under the first mode of operation;
Figure 15 be the present invention under the second mode of operation array element and helical distribution relation schematic diagram;
Figure 16 is the first pattern of the present invention and the detection wave beam contrast of the second pattern to the 2kHz sound of 1m distance;
Figure 17 is the first pattern of the present invention (a) and the imaging comparison diagram of the second pattern (b) to the 2kHz sound of 1m distance;
Figure 18 is the first pattern of the present invention and the detection wave beam contrast of the second pattern to the 6kHz sound of 1m distance;
Figure 19 is the first pattern of the present invention (a) and the imaging comparison diagram of the second pattern (b) to the 6kHz sound of 1m distance;
Figure 20 is the first pattern of the present invention and the detection wave beam contrast of the second pattern to the 10kHz sound of 1m distance;
Figure 21 is the first pattern of the present invention (a) and the imaging comparison diagram of the second pattern (b) to the 10kHz sound of 1m distance;
Figure 22 is that nine kinds of pattern arrays are surveyed and pointed to contrast property figure the omnirange of the 2kHz sound of 30cm distance;
Figure 23 is that nine kinds of pattern arrays are surveyed and pointed to contrast property figure the omnirange of the 6kHz sound of 30cm distance.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
The multimode stereoscopic microphone array that bidirectional screw distributes, as shown in Figure 1 to Figure 3, comprises main frame 9, four flanks 10 and is arranged on the array element node on main frame and flank, four described flanks can before and after be arranged on foldedly around main frame.Described main frame and flank constitute by planar rigidity support 8, and the concrete annexation of main frame and four flanks is: main frame outside links together by three folding hinges 11 and four flanks, and this three foldings hinge fixes by latch 15.Be symmetrically installed with four on the planar array rigid support of main frame front side before, fold vertical columns 16 and be connected with flank by folding rigid bracing 21; On the planar array rigid support of main frame rear side, being symmetrically installed with four folds afterwards vertical columns 14 and is connected with flank by folding rigid bracing 21.An array camera 5, the center that this center is array, the basic side of the coordinate that its optical surface is array are installed by camera installation sleeve 6 in center, front side at main frame.In four symmetric positions of the planar array rigid support of main frame front side, 4 light compensating lamps 7 are installed, for increasing brightness compared with under dark situation.In the back center position of main frame, by four centre posts 12,17, four centre posts of a main supporting disk being installed is connected and fixed with main supporting disk is vertical; A main stay pipe 20 is installed in the outside of main supporting disk, its concrete annexation is: the outside of main supporting disk connects a threaded collar 18, in this threaded collar, be connected with loose joint 19, by this loose joint, be connected with main stay pipe, the other end that is laid with 13, four oblique pull support bars of four oblique pull support bars in main supporting disk surrounding is fixed on the planar array rigid support of main frame.In the present embodiment, the width of planar array rigid support is 12mm left and right, thickness 6mm, can adopt the materials such as aluminium alloy, stainless steel, fiberglass to make, when adopting steel, width can be reduced to 5mm, even less, also can adopt other can guarantee that array bracket has enough just performance materials.
80 array element nodes are installed on the planar rigidity support of main frame and flank altogether, these array element nodes be positioned at take on eight helicals that are rotated counterclockwise that central point is the center of circle, four helicals that turn clockwise and the crosspoint of two kinds of helicals on, on every counterclockwise helical and every the helical that turns clockwise, all have 8 array element nodes, the array element on two kinds of helicals overlaps.As shown in Figure 4, each array element node comprises array element microphone 1, array element base amplifier 2, array element installing insulating ring 3, array element installation locking swivel nut 4 and array element signals line, described array element microphone 1 is arranged on array element base amplifier, this array element base amplifier is installed locking swivel nut by array element installing insulating ring and array element and is arranged in the installing hole that planar array rigid support is provided with, the endoporus that array element signals line is installed locking swivel nut through array element is drawn, and array element number of nodes can reduce according to practical application.Array element microphone adopts 1/4 inch or 1/2 inch of measuring microphone with array element base amplifier, the about 25mm of total height of array element node.
Four flanks can be folded to form multiple-working mode in front and back, and if Fig. 5 to Figure 13 is nine kinds of mode of operations commonly using, the three-dimensional microphone array that the diameter of take is below 1 meter describes:
The first mode of operation, as shown in Figure 5, four flank horizontal developments are also injected latch in the hole of three folding hinges fixingly, form the first mode of operation.The array element layout of the first mode of operation as shown in figure 14, the numbering that on counterclockwise helical, array element Cong Zhen outwards disperses at center arrangement is followed successively by: article one has S0, S1, S2, S3, S4, S5, S6, S7, second has S8, S9, S10, S11, S12, S13, S14, S15, article three, there is S16, S17, S18, S19, S20, S21, S22, S23, article four, there is S24, S25, S26, S27, S28, S29, S30, S31, article five, there is S32, S33, S34, S35, S36, S37, S38, S39, article six, there is S40, S41, S42, S43, S44, S45, S46, S47, article seven, there is S48, S49, S50, S51, S52, S53, S54, S55, article eight, there is S56, S57, S58, S59, S60, S61, S62, S63, the numbering that on clockwise helical, array element Cong Zhen outwards disperses at center arrangement is followed successively by: article one has S69, S25, S68, S17, S11, S66, S67, S6, second has S73, S41, S72, S33, S27, S70, S71, S22, article three, have S77, S57, S76, S49, S43, S74, S75, S38, the 4th has S65, S9, S64, S1, S59, S78, S79, S54.Article four, in clockwise helical and eight counterclockwise helicals, there is part array element node to intersect.
After four flanks of open and flat rear diameter 1m battle array launch completely, array element coordinate is as shown in the table:
Equal proportion is amplified array element coordinate figure just can change the pore size of array, and the version of array also can change to some extent, for example, array element coordinate figure is taken advantage of to the bidirectional screw microphone array that has just obtained diameter 2m after 2.Guaranteeing that under the prerequisite of enough rigidity, the array lattice framing width of the present embodiment is enough thin, the duty ratio approximately 13% while being designed to diameter 1m array, the duty ratio approximately 6% while being designed to the array of diameter 2m.
The second mode of operation, as shown in Figure 6, flank folds back and makes main frame and flank in folding coincidence status, and flank is connected with rear folding vertical columns.This pattern is solid array, and the spacing of flank and main frame is 18mm, and flank array element microphone and main frame array element microphone one spacing are 68mm, and as shown in figure 15, its array element coordinate is as shown in the table for its array element layout.
This pattern is a kind of looser parallel battle array combination, increased the array element closeness in detection plane, be conducive to reduce the measurement virtual image to high-frequency sound, and then make the 3dB under this pattern bring up to 24kHz without the virtual image measuring frequency upper limit, 5dB brings up to 18kHz without the virtual image measuring frequency upper limit, expanded the applying frequency scope of microphone array, but its separating power to low-frequency sound declines to some extent, make the separable lower-frequency limit under this pattern bring up to 600Hz, be used in conjunction with and can make the separable lower-frequency limit of 1m battle array be reduced to 320Hz with the first mode of operation, 3dB brings up to 24kHz without the virtual image measuring frequency upper limit, correspondingly, be used in conjunction with and can make the separable lower-frequency limit of 2m battle array be reduced to 200Hz with the first mode of operation, 3dB brings up to 15kHz without the virtual image measuring frequency upper limit.
The third mode of operation, as shown in Figure 7, flank folds back and becomes 315 ° of angles to form three-dimensional array with main frame, and flank is connected with rear folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, is conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, but it declines slightly to some extent to the separating power of low-frequency sound.
The 4th kind of mode of operation, as shown in Figure 8, flank folds back and becomes 270 ° of angles to form three-dimensional array with main frame, and flank is connected with rear folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, be conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, and to the stationkeeping ability of depth direction sound source, be the highest in all patterns, but it decline slightly to some extent to the separating power of low-frequency sound.
The 5th kind of mode of operation, as shown in Figure 9, flank folds back and becomes 225 ° of angles to form three-dimensional array with main frame, and flank is connected with rear folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, is conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, but it declines slightly to some extent to the separating power of low-frequency sound.
The 6th kind of mode of operation, as shown in figure 10, flank is folding forward becomes 135 ° of angles to form three-dimensional array with main frame, and flank is connected with front folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, is conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, but it declines slightly to some extent to the separating power of low-frequency sound.
The 7th kind of mode of operation, as shown in figure 11, flank is folding forward forms three-dimensional array with main frame angle in 90 °, and flank is connected with front folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, be conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, and be the highest in all patterns to the stationkeeping ability of depth direction sound source, or for measured target is carried out to enclosed measurement, but it declines slightly to some extent to the separating power of low-frequency sound.
The 8th kind of mode of operation, as shown in figure 12, flank is folding forward forms three-dimensional array with main frame angle at 45 °, and flank is connected with front folding vertical columns by folding rigid bracing.This pattern is compared the first pattern has increased the array element closeness in detection plane, is conducive to reduce the measurement virtual image to high-frequency sound, expanded the applying frequency scope of microphone array, but it declines slightly to some extent to the separating power of low-frequency sound.
The 9th kind of mode of operation, as shown in figure 13, flank forward folding and main frame is complete when parallel, makes main frame and flank in folding coincidence status, and flank is connected with front folding vertical columns.This pattern is solid array, and the spacing of flank and main frame is 30mm, flank array element microphone and main frame array element microphone interlaced arrangement, and array element interplanar distance is 20mm.This pattern is a kind of parallel battle array combination of the tightliest playing, increased the array element closeness in detection plane, be conducive to reduce the measurement virtual image to high-frequency sound, and then make the 3dB of 1m battle array bring up to 24kHz without the virtual image measuring frequency upper limit, expanded the applying frequency scope of microphone array, but its separating power to low-frequency sound declines to some extent, the separable lower-frequency limit of this pattern 1m battle array has been brought up to 600Hz, be used in conjunction with and can make the separable lower-frequency limit of 1m battle array be reduced to 320Hz with the first mode of operation, 3dB brings up to 24kHz without the virtual image measuring frequency upper limit, correspondingly, be used in conjunction with and can make the separable lower-frequency limit of 2m battle array be reduced to 200Hz with the first mode of operation, 3dB brings up to 15kHz without the virtual image measuring frequency upper limit.
In technique scheme, flank, to forward and backward folding while forming other angles with main frame, can form other more array patterns.
Microphone array of the present invention is listed in different space exploration performances under different mode, wherein the first pattern has best spatial resolution to sound source in two-dimensional space, acoustic image cross frequence lower limit is minimum, is applicable to measure all-bottom sound, but sound source before and after can not distinguishing.The second pattern has the highest without the virtual image measuring frequency upper limit, be applicable to measure high-frequency sound, and there is certain front and back resolution capability, but there are certain a few acoustic image measuring frequency trap, near Frequency point corresponding to acoustic image measuring frequency trap, acoustic imaging resolution pole is low, the localization of sound ability of the odd-multiple of the corresponding half-wavelength of double-deck front spacing is the poorest, and spacing is larger, exists the frequency of acoustic image measuring frequency trap lower.Figure 16,18,20 is respectively multimode stereoscopic microphone array the first pattern and the detection wave beam contrast to 2kHz, 6kHz, 10kHz sound respectively of the second pattern that 80 yuan of bidirectional screws of diameter 1m distribute.In figure, dotted line is the first pattern array beam, solid line is the second pattern array beam, from curve can find out the second pattern in the beam side lobe level of each frequency than the low about 5dB of the first pattern, within the scope of ± 40° angular field, the first pattern equates with main lobe to the secondary lobe of 8kHz sound, illustrate its without virtual image upper limiting frequency scope lower than 8kHz, and within the scope of ± 40° angular field, the second pattern to the secondary lobe of 16kHz sound still than the low 3dB of main lobe, only have the detection beam side lobe of 24kHz sound is equated with main lobe, the 3dB that the second pattern is described at least can reach 20kHz without virtual image upper limiting frequency.Figure 17,19, the 21st, multimode stereoscopic microphone array the first pattern (left side) that 80 yuan of bidirectional screws of diameter 1m distribute and the second pattern (right side) be the imaging contrast to 2kHz, 6kHz, 10kHz sound respectively.Wherein the left figure of every width figure is the image of the first pattern battle array, right figure is the image of the second pattern battle array, by contrast, can find out, for low-frequency sound, the image of image ratio the first pattern of the second pattern is thick, show that its spatial resolution is low, but can find out from the image contrast to high-frequency sound, within the scope of ± 40° angular field, imaging measurement for same frequency sound, the quantity that the virtual image of the first pattern occurs is more than the second pattern, and the virtual image intensity of virtual image strength ratio the second pattern of the first pattern is larger.
The third pattern has identical acoustic image cross frequence lower limit with the second pattern, lower slightly without the virtual image measuring frequency upper limit, and noiseless picture measuring frequency trap phenomenon, has certain front and back resolution capability.The 4th kind of pattern has identical acoustic image cross frequence lower limit with the second pattern, identical with the first pattern without the virtual image measuring frequency upper limit, and noiseless picture measuring frequency trap phenomenon, has best front and back resolution capability.The 5th kind of pattern and acoustic image cross frequence lower limit, between the first pattern and the second pattern, approach without the virtual image measuring frequency upper limit and the first pattern, and noiseless picture measuring frequency trap phenomenon, has certain front and back resolution capability.The 6th kind of pattern and acoustic image cross frequence lower limit are between the first pattern and the second pattern, without the virtual image measuring frequency upper limit and the first pattern, approach, noiseless picture measuring frequency trap phenomenon, has certain front and back resolution capability, is applicable to enclosed and measures compared with the sound of large equipment.The 7th kind of pattern has identical acoustic image cross frequence lower limit with the second pattern, identical with the first pattern without the virtual image measuring frequency upper limit, noiseless picture measuring frequency trap phenomenon, has best front and back resolution capability, is applicable to enclosed and measures compared with the sound of skinny device.The 8th kind of pattern has identical acoustic image cross frequence lower limit with the second pattern, lower slightly without the virtual image measuring frequency upper limit, and noiseless picture measuring frequency trap phenomenon, has certain front and back resolution capability.The 9th kind of pattern has higher without the virtual image measuring frequency upper limit, is applicable to measure high-frequency sound, front and back resolution capability than the second pattern a little less than, but exist the frequency of acoustic image measuring frequency trap higher.
It is that the omnirange of 2kHz, 6kHz sound is surveyed directive property comparison diagram that Figure 22,23 has provided respectively adjust the distance the respectively frequency at 30cm place of the first to the nine kinds of pattern arrays.Therefrom can find out, except the first pattern, the detection directive property of other various modes has stronger spatial selectivity, but the contrast differences of its main lobe and secondary lobe is different, main lobe is respectively not identical with the contrast differences of back lobe yet, illustrates and selects different patterns can realize different Effect on Detecting.
It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; if array element quantity can be the various ways such as 64 or 48; therefore the present invention includes and be not limited to the embodiment described in embodiment; every other execution modes that drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (10)
1. the multimode stereoscopic microphone array that a bidirectional screw distributes, it is characterized in that: comprise main frame, flank and array element node, described flank can be arranged on main frame side front and back foldedly, described main frame and flank are planar rigidity holder combination, described array element node installation take on eight helicals that are rotated counterclockwise that central point is the center of circle, four helicals that turn clockwise and the crosspoint of two kinds of helicals on.
2. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, it is characterized in that: the quantity of described array element node is 80, on every counterclockwise helical and every the helical that turns clockwise, all have 8 array elements, all array element nodes are installed on the edge of planar rigidity support.
3. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 and 2 distributes, it is characterized in that: described array element node comprises array element microphone, array element base amplifier, array element installing insulating ring, array element installation locking swivel nut and array element signals line, array element microphone is arranged on array element base amplifier, this array element base amplifier is installed locking swivel nut by array element installing insulating ring and array element and is arranged in the installing hole that planar array rigid support is provided with, and the endoporus that described array element signals line is installed locking swivel nut through array element is drawn.
4. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, is characterized in that: the quantity of described flank is 1,2,3 or 4.
5. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, it is characterized in that: described flank is connected with main frame by three folding hinges, before being provided with, fold vertical columns and be connected with flank by folding rigid bracing on the planar array rigid support of main frame front side, after being provided with, fold vertical columns and be connected with flank by folding rigid bracing on the planar array rigid support of main frame rear side, folding rigid bracing by different length makes flank and main frame be fixed as different angles to realize at least 9 array mode of operations.
6. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, it is characterized in that: the center, front side of described main frame is provided with array camera, this array camera is arranged in the centre bore of main frame by camera installation sleeve.
7. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 6 distributes, is characterized in that: on described array camera planar rigidity support around, be laid with four light compensating lamps.
8. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, it is characterized in that: a main supporting disk is installed by four centre posts in the back center position of described main frame, this main supporting disk is connected with the planar array rigid support of main frame by four oblique pull support bars, in the outside of main supporting disk, connect a threaded collar, in this threaded collar, be connected with loose joint, by this loose joint, connect a main stay pipe.
9. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, is characterized in that: described array element microphone is 1/4 inch or 1/2 inch of measuring microphone.
10. the multimode stereoscopic microphone array that a kind of bidirectional screw according to claim 1 distributes, is characterized in that: the material of described planar array rigid support is aluminium alloy, stainless steel or fiberglass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310006605.7A CN103227971B (en) | 2013-01-08 | 2013-01-08 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310006605.7A CN103227971B (en) | 2013-01-08 | 2013-01-08 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103227971A CN103227971A (en) | 2013-07-31 |
| CN103227971B true CN103227971B (en) | 2014-10-29 |
Family
ID=48838190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310006605.7A Active CN103227971B (en) | 2013-01-08 | 2013-01-08 | Multi-mode dimensional microphone array adopting two-way spiral distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103227971B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776877B (en) * | 2015-04-01 | 2017-05-03 | 浙江大学 | Three-dimensional microphone array tensioning positioning instrument |
| CN105276341B (en) * | 2015-11-20 | 2017-11-10 | 湖南大学 | A kind of Vehicular multifunctional microphone mounting bracket |
| CN107782441B (en) * | 2016-08-30 | 2021-04-13 | 张若愚 | Three-dimensional acoustic sensor array for target noise test |
| FI129137B (en) * | 2016-09-22 | 2021-08-13 | Noiseless Acoustics Oy | An acoustic camera and a method for revealing acoustic emissions from various locations and devices |
| CN108445450B (en) * | 2018-04-13 | 2024-03-12 | 上海其高电子科技有限公司 | Ultra-large scale sound source positioning method |
| CN112179483B (en) * | 2020-09-28 | 2022-07-05 | 上海工程技术大学 | Microphone array with scalable aperture |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369806Y (en) * | 2009-02-02 | 2009-12-23 | 中国科学院声学研究所 | Spherical microphone array |
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN201718024U (en) * | 2010-05-07 | 2011-01-19 | 中国科学院声学研究所 | Plane spiral microphone array |
| CN203015095U (en) * | 2013-01-08 | 2013-06-19 | 中科声相（天津）科技有限公司 | Multi-mode stereo microphone array distributed in a two-way spiral manner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2438259B (en) * | 2006-05-15 | 2008-04-23 | Roke Manor Research | An audio recording system |
-
2013
- 2013-01-08 CN CN201310006605.7A patent/CN103227971B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369806Y (en) * | 2009-02-02 | 2009-12-23 | 中国科学院声学研究所 | Spherical microphone array |
| CN101860776A (en) * | 2010-05-07 | 2010-10-13 | 中国科学院声学研究所 | Planar spiral microphone array |
| CN201718024U (en) * | 2010-05-07 | 2011-01-19 | 中国科学院声学研究所 | Plane spiral microphone array |
| CN203015095U (en) * | 2013-01-08 | 2013-06-19 | 中科声相（天津）科技有限公司 | Multi-mode stereo microphone array distributed in a two-way spiral manner |
Non-Patent Citations (1)
| Title |
|---|
| 刘哲，陈日林，藤鹏晓，杨亦春.基于平面传声器阵列的声源定位系统.《声学技术》.2011,第30卷(第2期),第123-128页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103227971A (en) | 2013-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103227971B (en) | Multi-mode dimensional microphone array adopting two-way spiral distribution | |
| Park et al. | Giant acoustic concentration by extraordinary transmission in zero-mass metamaterials | |
| Feng et al. | Negative refraction of acoustic waves in two-dimensional sonic crystals | |
| CN107863096B (en) | Reflection type wavefront-regulated super-surface structure and application method thereof | |
| CN203015095U (en) | Multi-mode stereo microphone array distributed in a two-way spiral manner | |
| JP2015114142A5 (en) | ||
| CN110010119B (en) | Acoustic super-surface structure and acoustic vortex wave generator | |
| CN109102795A (en) | A kind of acoustics super lens for realizing the imaging of depth sub-wavelength | |
| CN201369806Y (en) | Spherical microphone array | |
| CN109901118A (en) | Manual corner reflector for synthetic aperture radar interferometry calibration | |
| Kjellander et al. | Experimental determination of self-similarity constant for converging cylindrical shocks | |
| CN103278095B (en) | The production method of one-dimensional extension type target apparatus and feature point for calibration thereof | |
| Naify et al. | Demonstration of a directional sonic prism in two dimensions using an air-acoustic leaky wave antenna | |
| CN104287262A (en) | Three-dimensional body scanner | |
| de Moraes Calazan et al. | Simplex based three-dimensional eigenray search for underwater predictions | |
| CN208255399U (en) | Ultra-large sound source locating device | |
| CN104749654A (en) | Quaternary composite array sensing layout method based on PIR (passive infrared) sensors and microphones | |
| CN105744437B (en) | Horizontal omnidirectional sound intensifier | |
| CN110779456A (en) | Terahertz waveband super-surface phase shift device and measuring method thereof | |
| CN202735507U (en) | Wide-aperture stereo array structure | |
| CN211627803U (en) | Sound source positioning random array device based on polar coordinate system | |
| CN108922511B (en) | Acoustic super-surface structure and acoustic antenna device | |
| CN114267320A (en) | Sub-wavelength acoustic metamaterial coupling structure for sound source positioning | |
| CN101558324B (en) | Transducer array arrangement and operation for sodar applications | |
| CN103594081A (en) | Design method for composite paraboloid for sound bunching |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |