CN208255399U - Ultra-large sound source locating device - Google Patents
Ultra-large sound source locating device Download PDFInfo
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- CN208255399U CN208255399U CN201820522537.8U CN201820522537U CN208255399U CN 208255399 U CN208255399 U CN 208255399U CN 201820522537 U CN201820522537 U CN 201820522537U CN 208255399 U CN208255399 U CN 208255399U
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Abstract
A kind of ultra-large sound source locating device, comprising: main frame, panel and the array element node being set on panel, panel are detachably connectable to main frame by connection structure；Video flowing is collected by array camera；The device realizes extension by increasing cube rigid support unit；The utility model positioning is remote, low-frequency sound source signal accuracy is high, real-time is good.
Description
Technical field
The utility model relates to a kind of skills of the large-scale or remote object field of sound source location such as aircraft, blower
Art, specifically a kind of ultra-large sound source locating device.
Background technique
Existing large size array is many kinds of, Various Functions, but really solves simultaneously without a microphone array: 1)
The frequency of source lower limit of positioning is down to the collected effective sound-source signal lower-frequency limit of Mike's wind energy；2) the sound source distance positioned is big
In 300m；3) array size and element number of array can truly infinite expandings；4) it is rigid to solve ultra-large type microphone array array structure
Spend the problem poor, microphone error of coordinate is big；5) camera visual angle is adjustable, does not have to mobile array, need to only adjust camera angle
It can be achieved with to different direction auditory localization；6) it combines beamforming algorithm to simplify processing, calculates time saving.
Utility model content
The utility model In view of the above shortcomings of the prior art, proposes a kind of ultra-large sound source locating device, uses
The video flowing that ultra-large microphone array detection azimuthal viewing angle is acquired while acquiring the audio signal that sound source issues, obtains
It is accurately positioned result.
The sound source includes but is not limited to aircraft, blower etc..
The utility model is achieved through the following technical solutions:
The utility model relates to a kind of ultra-large sound source locating devices, comprising: main frame, panel and be set to panel
On array element node, in which: panel is detachably connectable to main frame by connection structure.
The main frame is the combination of detachable cube rigid support unit, passes through support rod between each carrier unit
Ultra-large array is movably connected to form with adapter.
The flexible connection preferably further realizes extension by increasing cube rigid support unit.
The array element node is at least 80, in which: the center of ultra-large microphone array, i.e. coordinate origin (x=
0, y=0) an array element node is equipped at, remaining array element node is with oval successively extension.
The array camera for acquiring video flowing is further provided on the main frame, array camera fixation is set
It is placed in the X-coordinate 15cm of the main frame of ultra-large microphone array, at Y coordinate 0cm, the camera visual angle is adjustable, camera
Default coordinate is (x, y), and default angle 0, i.e. camera normal direction are parallel with ultra-large microphone array normal direction, adjustment camera shooting
Brilliance degree is θ, and new coordinate is (x', y'), x'=x after conversion*cos(θ)-y*Sin (θ), y'=y*sin(θ)+y*cos(θ)。
The layer-by-layer extension is six layers of oval structure, and every layer of array element quantity is respectively 6,10,12,14,17 and 20.
Technical effect
Compared with existing sound source locating device, the frequency of source lower limit of the utility model positioning is collected down to Mike's wind energy
Effective sound-source signal lower-frequency limit；The sound source distance of positioning is greater than 300m；Array size and element number of array can be truly
Infinite expanding；Solve the problems, such as that the ultra-large type microphone array rigidity of structure is poor, microphone error of coordinate is big；Camera visual angle can
It adjusts, does not have to mobile array, only need to adjust camera angle can be achieved with to different direction auditory localization；Algorithm simplifies processing, section
Save calculation amount.
Detailed description of the invention
Fig. 1 is the perspective view of the utility model；
Fig. 2 is the main view of the utility model；
Fig. 3 is the bottom view of the utility model；
Fig. 4 is the top view of the utility model；
Fig. 5 is the left view of the utility model；
Fig. 6 is the right view of the utility model；
Fig. 7 is cube rigid support unit figure；
Fig. 8 is array element node diagram；
Fig. 9 array element node distribution map；
Figure 10 array element node and panel number corresponding diagram；
Figure 11 array directivity pattern；
Figure 12 window function coefficient figure；
Figure 13 window function frequency response function；
Figure 14 adding window and window beamforming algorithm is not added to identical auditory localization directive property comparison diagram；
Figure 15 program flow diagram
Specific embodiment
As shown in Figure 1, for a kind of ultra-large sound source locating device that the present embodiment is related to, it includes: main frame, face
Plate, array element node, in which: panel is mounted on main frame by 8 nuts.
The main frame is composed of multiple cube rigid support units, as shown in fig. 7, each cube is rigid
Carrier unit includes: oblique 7, four transverse connecting rods 8 of connecting rod of four 6, eight, longitudinally connected bars and eight adapters 9,
In: longitudinally connected bar 6 and adapter 9 are connected through a screw thread, and are interference fitted between transverse connecting rod 8 and adapter 9, oblique connection
Bar 7 and adapter 9 are fixed by the pin shaft of TBE (threaded both ends), and pin shaft and oblique connecting rod 7 are clearance fit, transverse connecting rod 8
It can be rotated around pin shaft.
The connecting rod plays reinforcing rib to rigidity, the stability of cube rigid support unit；Cube is rigid
The rigidity of property support level and vertical direction is all guaranteed, and structural stability is good, is unlikely to deform, and microphone coordinate precision obtains
To guarantee.
The present embodiment is opened the fixed card buckle on longitudinally connected bar 6, longitudinally connected bar 6 by removing transverse connecting rod 8
It is divided into two sections, the contraction of cube rigid support unit is realized by rotating oblique connecting rod 7, array main frame passes through cube
The contraction of rigid support unit, which is realized, shrinks.
Array is installed by array camera head fixing device at the X-coordinate 15cm of the main frame, Y coordinate 0cm to take the photograph
As head, camera angle is adjustable.
The array element node is 80, there is an array element node at coordinate origin, with the past external expansion of ellipse, first layer
Ellipse has 6 array element nodes, and second layer ellipse has 10 array element nodes, and third layer ellipse has 12 array element nodes, and the 4th layer ellipse
Circle has 14 array element nodes, and layer 5 ellipse has 17 array element nodes, and layer 6 ellipse has 20 array element nodes.
As shown in figure 8, each array element node includes array element hurricane globe 5, array element microphone 4, array element microphone base 3, battle array
First wing nut 2, array element firm banking 1, array element microphone base are fixed on face by array element firm banking, array element wing nut
Plate there are mounting hole in, array element microphone is mounted on array element microphone base, and the windproof enclosure is on array element microphone, array element
Number of nodes can be increasedd or decreased according to practical application.
The array element microphone uses 1/4 inch or 1/2 inch of the microphone with array element pedestal.
Array element node layout is numbered, each array element as shown in Fig. 9 to Figure 10 to panel where each array element microphone
The corresponding coordinate of node and panel number are as shown in the table:
Figure 11 is directivity pattern of the array to 200Hz sound source at 350 meters, and main lobe is higher by 15dB than secondary lobe, and directive property is good.
The main frame can be by 7 × 13 cube rigid support unit groups and form, can also be basic herein
Upper extension.
The present apparatus is expansible by formation, element number of array is expansible, and the lower-frequency limit of localization of sound source is Mike's wind collecting
The effective sound-source signal lower-frequency limit arrived, localization of sound source distance are greater than 300 meters.
The cube rigid support unit of the present apparatus uses full rigidity structure, has nine connecting rod branch at each adapter
Support, stabilized structure is reliable, good rigidity, and array element node installation hole is preset on panel, and microphone error of coordinate is small.
The present apparatus can conveniently move repeatedly arrangement at a small cubes structure with integral telescopic and use, and can also be disassembled into
Multiple independent cube rigid support units facilitate storage, transport.
Camera visual angle in the present apparatus is adjustable, does not have to mobile array, only need to adjust camera angle can be achieved with to not
With orientation auditory localization, which is (x, y), and default angle 0, adjustment camera angle is θ, new after conversion
Coordinate (x', y') meets: x'=x*cos(θ)-y*Sin (θ), y'=y*sin(θ)+y*cos(θ)。
The calculating process of the specific localization of sound source of the present embodiment is as follows:
The first step, microphone array collected sound signal obtain discrete signal s (n), and n is time series；
Second step, to discrete signal s (n) sub-frame processing, in each frame each microphone as a channel, each frame
Signal length is preferably 1024 points；
Step 3: 1024 points to each channel in each frame distinguish windowing process, used window function are as follows:It is time series that α, which generally takes 0.46, n, and N is each channel
Signal length, herein, N=1024；
Signal after the adding window
4th step is done DFT calculating to the signal after adding window, is obtained s (f), f is frequency point information；
5th step, camera obtain image aspects, and the grid division in visual angle；
Image aspects are divided into C*D mesh point by the division, the corresponding Delay of each mesh point is long
L=80, the i.e. vector T of microphone number=[1 Δ 2 ... Δ 80 of Δ] are spent,ΔijIt is
Delay between i-th of mesh point and j-th of microphone, wherein (xi, yi) it is i-th of mesh point coordinate, (Xj, Yj) be
J-th of microphone coordinate, c are the velocities of sound, default 340m/s；
6th step, cross-spectrum matrixWherein e=80, i.e. microphone number, Cnm=sn
(f)×sn(f)*Cross-spectrum of the sound pressure signal relative to n microphone reception sound pressure signal is received for m microphone, is each microphone
Receive the spectrum C certainly of sound pressure signalnnSound pressure signal cross-spectrum C is received with different two microphonenmThe generalized expression of (n ≠ m)；
7th step eliminates each microphone and receives the spectrum certainly of sound pressure signal as a result, obtaining except the cross-spectrum matrix from spectrum:
Matrix is symmetrical about diagonal line, and when calculating only takes diagonal line to participate in calculating；
Sound pressure signal is received except the cross-spectrum delay summation Wave beam forming output result from spectrum based on array microphone are as follows:Wherein: V (k, w) is the mean-square value of beam forming, and k is focus direction list
Bit vector, w are signal circular frequency, and M is number of sensors, CnmSound pressure signal is received for m microphone to connect relative to n microphone
Receive the cross-spectrum of sound pressure signal, rmIt is m microphone coordinate vector, rnIt is n microphone coordinate vector；
8th step, Wave beam forming mean-square value are G × T, only take G upper triangular matrix to be calculated, Wave beam forming mean-square value pair
The coordinate for the maximum value answered is sound source position, and obtains acoustic pressure cloud atlas；
The video flowing that acoustic pressure cloud atlas and camera acquire is superimposed by the 9th step, obtains positioning result.
Application 1 (unmanned plane positioning): it is no more than 300m using the sound source distance that before the utility model, can be oriented.
Application 2 (fan noise positioning): being 200Hz using the frequency of source lower limit that before the utility model, can be positioned,
Fan noise main frequency is the low-frequency noise of 20~200Hz.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific
Implementation is limited, and each implementation within its scope is by the constraint of the utility model.
Claims (7)
1. a kind of ultra-large sound source locating device characterized by comprising main frame, panel and be set on panel
Array element node, in which: panel is detachably connectable to main frame by connection structure；Video flowing is acquired by array camera
It arrives.
2. ultra-large sound source locating device according to claim 1, characterized in that the flexible connection passes through increasing
Cube rigid support unit is added to realize extension.
3. ultra-large sound source locating device according to claim 1, characterized in that the main frame is by multiple cubes
Body rigid support unit is composed, and each cube rigid support unit includes: four longitudinally connected bars, eight oblique connections
Bar, four transverse connecting rods and eight adapters, in which: longitudinally connected bar and adapter are connected through a screw thread, transverse connecting rod
It is interference fitted between adapter, oblique connecting rod and adapter are fixed by the pin shaft of TBE (threaded both ends), pin shaft and oblique company
Extension bar is clearance fit, and transverse connecting rod can be rotated around pin shaft.
4. ultra-large sound source locating device according to claim 1, characterized in that the array element node is at least 80
It is a, in which: the center of ultra-large microphone array, i.e., at coordinate origin be equipped with an array element node, remaining array element node with
Oval successively extension.
5. ultra-large sound source locating device according to claim 1 or 2, characterized in that the main frame enterprising one
Step is equipped with the array camera for acquiring video flowing.
6. ultra-large sound source locating device according to claim 5, characterized in that the array camera fixation is set
It is placed in the X-coordinate 15cm of the main frame of ultra-large microphone array, at Y coordinate 0cm, the camera visual angle is adjustable, camera
Default coordinate is (x, y), and default angle 0, i.e. camera normal direction are parallel with ultra-large microphone array normal direction, adjustment camera shooting
Brilliance degree is θ, and new coordinate is (x', y'), x'=x*cos (θ)-y*sin (θ), y'=y*sin (θ)+y*cos (θ) after conversion.
7. ultra-large sound source locating device according to claim 4, characterized in that the layer-by-layer extension is six layers
Oval structure, every layer of array element quantity are respectively 6,10,12,14,17 and 20.
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| CN201820522537.8U CN208255399U (en) | 2018-04-13 | 2018-04-13 | Ultra-large sound source locating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738867A (en) * | 2019-02-26 | 2019-05-10 | 应急管理部沈阳消防研究所 | The sound positioning performance detection system and method for sound induction evacuation product |
| CN110418242A (en) * | 2019-07-30 | 2019-11-05 | 西安声必捷信息科技有限公司 | Sound source direction method, apparatus and system |
| WO2022087774A1 (en) * | 2020-10-26 | 2022-05-05 | 中科传启（苏州）科技有限公司 | Extendable large-scale mems microphone array |
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2018
- 2018-04-13 CN CN201820522537.8U patent/CN208255399U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109738867A (en) * | 2019-02-26 | 2019-05-10 | 应急管理部沈阳消防研究所 | The sound positioning performance detection system and method for sound induction evacuation product |
| CN110418242A (en) * | 2019-07-30 | 2019-11-05 | 西安声必捷信息科技有限公司 | Sound source direction method, apparatus and system |
| CN110418242B (en) * | 2019-07-30 | 2021-02-05 | 西安声必捷信息科技有限公司 | Sound source orientation method, device and system |
| WO2022087774A1 (en) * | 2020-10-26 | 2022-05-05 | 中科传启（苏州）科技有限公司 | Extendable large-scale mems microphone array |
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