CN101558324A - Transducer array arrangement and operation for sodar applications - Google Patents
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Abstract
The invention discloses an array (10) of transducers (12) for a sodar system, and the operation of the array (10) in a monostatic sodar system. The array (10) is made up of a number of individual sound transducers (12). Each transducer (12) emits sound into the atmosphere and senses emitted sound that has been reflected by the atmosphere. The transducers (12) have a generally circular cross-sectional shape. The transducers (12) are arranged in a generally planar, generally hexagonal grid packing arrangement.
Description
Technical field
The present invention relates to a kind of acoustic sounding and range finding (acoustic radar) system.
Background technology
Sodar system utilizes sound to detect meteor, for example wind speed.Single base (monostatic) acoustic radar is by launching directed sound pulse and detecting and operate from the signal of single device reflected back.Acoustic transducer transmits and receives different directions by means of electronic unit beam of sound is organized in the phased array monostatic sodar utilization more.This be by change by the phase place that independent transducer transmitted of forming array and change sampling process phase place so that the signal that the transducer detection is returned from atmospheric reflectance realize.In operating process, keep static on this body structure of array.Described this method in the patent No. is the patent of US4558594, the content of this patent disclosure is incorporated into by reference at this.
The advantage of this phased array method is: the directive overrurrent relay density that transmits and want the directed susceptibility of the array of received signal to have main beam width very narrow with respect to single transducer, and it can utilize suitable electron device to be oriented on a plurality of directions.
Monostatic sodar systems typically utilizes and is disposed in the transducer array of rectangular node in fill arranging, makes transducer arrange with row and column, is shown in Fig. 2,4 and 5 in 4558594 the patent as the patent No..These arrays are operated and make three continuous wave beams of these arrays emission, and one perpendicular to array plane, two other tilt with certain altitude with respect to array and between them the phasing degree be 90 degree.Adopt the rectangular node of circular transducer to make 27% of array surface become the clear area at interval, so just on array, produced the inhomogeneous of acoustic pressure, might cause measuring error.In addition, the maximum intensity that this has also reduced acoustic pressure has inherently correspondingly reduced the accuracy and the susceptibility of array.And adopting asymmetric beam of sound to cause asymmetric sensing, this has just produced the measurements and calculations error.
Summary of the invention
The present invention includes a kind of layout or array that is used for the acoustic transducer of sodar system, and a kind of this array of operating is to realize the system and method for improved atmospheric exploration.On the one hand, the present invention includes to fill and arrange and replace traditional rectangular node to fill arranging making up acoustic transducer array with hexagonal mesh roughly.Array advantageous applications of the present invention is in monostatic sodar systems.On the other hand, the present invention includes described transducer is operating as on three that are spaced apart 120 degree directed rows (rather than two directed rows that are spaced apart 90 degree) phased array of operation in order.This operation has produced three continuous sound wave bundles, and these three wave beams have the main axis that is spaced apart 120 degree phasing degree each other.As preferably, three wave beams are all at the sustained height place.So just make that the main axis of three wave beams is evenly spaced apart around the virtual vertically-oriented conical surface that with array center is its summit.
As preferably, use transducer in the present invention with symmetry (circle) actuator and loudspeaker (horn), make each transducer not have inherent directivity.An advantage of the present invention is, the roughly hexagonal mesh of described array is filled and arranged and generate the array that the acoustics that is approached transducer actuator, transducer horn by each transducer area surrounded and be associated with them scatters the circle of pattern.This transducer is filled and is arranged that the inherence has reduced the undesirable acoustic characteristic in the space between the loudspeaker, thereby has improved the homogeneity of array front side acoustic pressure.Inhomogeneity raising has reduced sound to the emission that is directed to outside the wave beam periphery, and symmetry has also reduced the susceptibility of array to the receive mode of the outer sound of wave beam.
Another advantage is, compares with the transducer that the rectangular node of the transducer of arranging with row and column is allowed to adopt at interval, and substantially hexagonal grid filling is arranged and allow to adopt more transducer in the given area.The transducer packed density of array of the present invention has also improved the homogeneity and the intensity of the acoustic pressure of passing the transducer front side.
Another is also advantageous in that, utilizes three wave beams that are directed spaced apart 120 degree, and the operation of the array of structural symmetry on each direction in the phasing degree direction of being propagated at wave beam is made three continuous sound wave Shu Jinhang operations of symmetry on acoustic radar is based on structure.This makes the shell of acoustic radar be processed to the shape symmetry, and produces being launched and received beam of sound of shape symmetry then.Like this, the distortion that produces owing to the interaction with shell is applied on all three orientations inherently.This has just reduced the measurements and calculations error that produces owing to asymmetric operation.
Also have another advantage to be, utilize three wave beams that are directed spaced apart 120 degree, the operation of array allows to have maximum angle between the center of each wave beam, and allows to have between arbitrary beam center and summit the maximum angle of any specific.Because the angle that increases between each wave beam can improve degree of accuracy, increase angle between each wave beam and the summit then because atmospheric effect can reduce the reliability of degree of accuracy and data aggregation, so with respect to prior art, this structure has improved the reliability of accuracy and data aggregation.
Of the present inventionly be characterized as a kind of transducer array that is used for sodar system, this transducer array comprises a plurality of independently acoustic transducers that are used for to atmosphere emission sound and detect the sound of having been returned by atmospheric reflectance that is sent; Wherein said transducer arrangement basically flat, during roughly hexagonal grid is filled and is arranged.Described transducer array comprises the essentially identical transducers that many rows closely fill, and the described transducer among the adjacent row is offset the only about half of of transducer width each other on the direction perpendicular to described row's longitudinal axis simultaneously.Described transducer itself can limit and be roughly hexagonal peripheral shape.Described transducer horn can have circular substantially shape of cross section.
As preferably, described transducer array comprises 36 transducers at least.Described transducer is arranged at least seven rows.Can limit each limit in six limits of lattice by at least three transducers, and preferably limit by four transducers.In one embodiment, first row (that row who forms the limit of array) comprises four transducers, five transducers are drawn together in that package after each limit, six transducers are drawn together in every package among three rows after this row, five transducers are drawn together in that package after this three row, and four transducers are drawn together in last package.
Described transducer array is operated, and is spaced apart azimuthal three the continuous wave beams of about 120 degree with generation.The described transducer of forming a row is preferably with substantially the same Frequency Synchronization ground operation, and each continuously operation of row be that row with respect to operation instantly carries out all uniformly phase shift, thereby be created in the wave beam that the certain altitude with respect to the plane of transducer tilts.Described all phase shift between row and row are approximately 60 degree.The half-power point of the angular breadth of described wave beam from the main axis of described wave beam to described wave beam is approximately 5 degree.Each intrafascicular wave beam of described three continuous waves is launched along the main beam axis, and the main axis of described three wave beams is positioned at substantially the same height place.The main axis of described three wave beams is positioned at the height of about 10 degree on the plane from the normal of described transducer to described transducer.In a particular embodiment, the height of described wave beam is about 11.2 degree of the described normal of distance.Described transducer array preferably is operated, to produce a plurality of essentially identical wave beams.The half-power point of the angular breadth of each wave beam in the described wave beam from the main axis of described wave beam to described wave beam is approximately 5 degree.
Described transducer can have roughly hexagonal periphery.The effective coverage of described transducer comprises about 90% of array region at least.Described transducer can be a tweeter horn.Described transducer preferably limits a circular cross section.The diameter of described transducer preferably is about 3 inches.Described transducer can have the plastics cone.The cone of described transducer can be made by polycarbonate.
A kind of transducer array that is used for sodar system is characterised in that this transducer array comprises a plurality of independently acoustic transducers of the sound of having been returned by atmospheric reflectance that is used for to atmosphere emission sound and is used for that sensing sends; The effective coverage of wherein said transducer comprises about 90% of array region.
A kind of transducer array that is used for sodar system is characterised in that this transducer array comprises a plurality of independently acoustic transducers of the sound of having been returned by atmospheric reflectance that is used for to atmosphere emission sound and is used for that sensing sends; During that wherein said transducer is disposed in is flat substantially, roughly hexagonal grid is filled and arranged, described layout comprises the substantially the same transducer that many rows closely fill, simultaneously the described transducer among the adjacent row is offset the only about half of of transducer width each other on the direction perpendicular to described row's longitudinal axis, and at least three transducers limit each limit in six limits of described lattice; Wherein said transducer array is operated, be spaced apart azimuthal three continuous, the substantially the same and symmetrical wave beams of 120 degree with generation, described operation comprises the described transducer of forming a row with substantially the same Frequency Synchronization ground operation, simultaneously each continuously operation of row be that row with respect to operation instantly carries out all uniformly phase shift, thereby be created in the wave beam that the certain altitude with respect to the plane of described transducer tilts.
Description of drawings
In conjunction with the following drawings, other purpose, the feature and advantage that present invention will become more fully understood, in institute's drawings attached, identical Reference numeral is represented same or similar parts, and wherein:
Fig. 1 is the skeleton view that is used for 36 transducer element arrays of embodiments of the invention;
Fig. 2 A, 2B and 2C schematic representation three wave beams that produce by operation according to the array of Fig. 1 of embodiments of the invention.In above-mentioned figure, for clarity, with the scale wave beam more much smaller than array itself;
Fig. 3 A, 3B and 3C show each row who is operated in order with the array element of the wave beam that produces Fig. 2 A, 2B and 2C respectively;
Fig. 4 A and 4B are the different directions skeleton views of preferred embodiment that is used for the acoustic radar shell of transducer array shown in Figure 1, and Fig. 4 C is its vertical view;
Fig. 4 D is the rough schematic in the cross section of shell shown in Fig. 4 A-4C, has described the beam of sound path;
Fig. 5 is the vertical view of the available layout of the transducer array in the shell identical with the overall design of shell shown in Fig. 4 A-4D; And
Fig. 6 is the schematic block diagram that is used to operate according to the system of transducer array of the present invention.
Embodiment
The continuous directed sound beams of monostatic sodar utilization is as the part of its operation.Typically, independently acoustic transducer is similar in the wide wave front of spherical surface one and sounds, and this makes these acoustic transducers not be suitable for not having the acoustic radar of Focusing mechanism.As shown in Figure 1, closely the array 10 of filling and even isolated transducer can be finished focusing by the wavefront interference pattern that produces a complexity, thereby can produce the narrower main beam of main beam that generates than single transducer effectively.The angular spread of wave beam is relevant with the quantity of transducer in the array, and on the whole, transducer is many more, and the wave beam of generation is just narrow more.Array with 32 to 60 transducers can produce usually for acoustic radar uses enough narrow wave beam, and array 10 of the present invention has 36 transducers 12.Each transducer 12 has circular actuator and loudspeaker.Transducer 12 is closely filled (7 such rows are arranged) along a plurality of parallel in the non-limiting preferred embodiment of invention shown in Figure 1, simultaneously adjacent row's transducer is offset half of transducer diameter on perpendicular to each row's direction each other.Thisly be arranged in this and be defined as roughly hexagonal grid and fill and arrange.
Each transducer preferably has hexagonal overall circumference shape, with diameter be that effectively horn region is closely external for 3 inches circular.Transducer is based on standard piezoelectric tweeter horn element, thereby the profile of this element is reequiped and is convenient to hexagonal mesh and fill arranges.The paper cone of transducer can replace with plastics (being preferably polycarbonate) cone, to improve the weather-resistance of equipment.For the ease of the installation and the replacing of equipment, transducer 12 is provided with connector.Described transducer can be designed to be about as preferred operating frequency concerning equipment of the present invention the transmitter and the receiver of the sound of 4000Hz (more specifically being 4425Hz) and operate effectively.The transducer that the size of described transducer is confirmed as making phased array techniques can use fair amount produces the beam of sound with good directivity.The element of transducer of other shapes and type just can not be assemblied in the hexagonal array so effectively, can not operate as transmitter and receiver simultaneously under desired operating frequency so effectively, and be not suitable for being installed in the open-air equipment.
The roughly hexagonal grid of roughly hexagonal outer shape of described array and described array is filled and is arranged and also allow not control the necessary direction control of wave beam under the situation of mechanical part being provided with.It is that transducer by driving is arranged in series of parallel row is finished that wave beam is controlled, and the transducer among each row is in phase driven each other, and every row is made a long driver to move by same wave, but has the continuous all phase shift that equate between row and row.If do not have all phase shift between each row, just along axis emission main beam perpendicular to array plane.Owing to introduced all phase shift, interference figure just changes over that to make wave beam be oriented at no longer be that vertical (supposing that array is a level) highly located.In addition, wave beam and the axis normal of the transducer of forming each row among each row along its location.Like this, by driving be arranged in different relative orientations each row transducer, can produce the wave beam that is directed along desired azimuth direction.
Roughly hexagonal grid is filled and is arranged and make the occupied hexagonal area of each active component of array approximately only the circular occupied actual area greater than each transducer horn is big by 10%.Like this, approximately only there is 10% of array region not participate in sound generating or sensing.In this and the prior art rectangular node array element arrange completely different, in the prior art, the square region actual area big 27% more occupied that each circular transducer is occupied than circular transducer horn.Hexagonal mesh array of the present invention fill arrange make in the whole array to desired interference figure and minimum to all inoperative zone of consistance of the acoustic pressure of passing array.Air flow between the circular transducer in the zone also can produce interference figure, and described interference figure produces audio emission on other direction that is different from the direction of estimating wave beam.This unnecessary emission has reduced the ability of sodar system discrimination beam direction, thereby has lowered its measurement performance.Also along continuous straight runs radiation of this unnecessary emission, thus can run into tree or near the object other, produced and estimated that wave beam is similar or than its bigger echo to the reflection amplitudes of meteor.
Hexagonal array of the present invention is around spending symmetry on isolated six longitudinal axis structures with 60.This is adopt to constitute three or more transducers among each row of six outboard row on hexagonal six limits and the transducer (transducer in the adjacent parallel row of array is offset half of transducer width mutually) of closely filling in array is realized.This creative roughly hexagonal mesh is filled and is arranged and allow to be operating as three to six general conical wave beams that produce in order along the emission of main beam axis, and described main beam axis is symmetry and being positioned on this surface roughly around the surface of the virtual vertical circular cone with the summit that is positioned at the array center place.Preferred embodiment produces three this wave beams that are spaced apart 120 degree.Described wave beam is positioned at a suitable height place, and this is highly determined by mode of operation.In Fig. 2 A-2C schematic representation this wave beam.This synoptic diagram is schematically fully, because the bottom of wave beam is more as a circle that is roughly array sizes.The effective length of wave beam is approximately 400 times of array diameter.Fig. 3 A-3C has schematically shown the operation of the array that produces this wave beam.The schematic block diagram that is used to finish this operated system has been shown among Fig. 6.
For example, in order to generate the wave beam 1 that schematically shows among Fig. 2 A, the transducer 4,9,15 and 21 of forming row 1 is driven by a specific waveforms; The transducer 3,8,14,20 and 27 of forming row 2 is by the same drive waveform with all phase shift n; Row 3 has all phase shift 2n with respect to row 1; Row 4 has all phase shift 3n with respect to row 1; Row 5 has all phase shift 4n with respect to row 1; Row 6 has all phase shift 5n with respect to row 1; Row 7 has all phase shift 6n with respect to row 1.Shown in Fig. 3 B, wave beam 2 generates by making first row move 120 degree according to clockwise mode, makes the package of winning draw together transducer 33,34,35 and 36, simultaneously the also row of showing 2 to 7 and operate array in same mode among the figure.Shown in Fig. 3 C, generates wave beam 3 by making first row move 120 degree once more equally according to clockwise mode, make the package of winning draw together transducer 1,5,10 and 16, simultaneously the also row of showing 2 to 7 and also operate respectively and arrange among the figure in same mode.
System shown in Fig. 6 150 finishes this operation by signal generator 152 for phase transition control device 154 provides signal, and described phase transition control device 154 provides suitable transducer drive signal for the array 156 of transducer 1 to N.The echoed signal that is received by transducer array 156 sends to receiver 158 and processor 160 by a certain route, the atmospheric information that the output of this processor can obtain from sodar system.Can from prior art, understand the atmospheric information that obtains from the acoustic radar signal, as setting forth in the United States Patent (USP) 4558594.
It will be apparent to one skilled in the art that system 150 can be used as all hardware, or the combination of hardware and firmware realizes.As preferably, except the part of all signal generators 152 and phase transition control device 150 was implemented as firmware in microprocessor and the dsp chip, system 150 was realized by hardware.
Because the transducer arrangement of array 10 is that three wave beams are mutually the same basically about each the limit symmetry in six limits of hexagonal array, unique difference is the azimuth direction of wave beam main axis.Can produce nearly six such wave beams.The shell 100 of horn shape has the shape of symmetry equally among Fig. 4 A-4C, defines three the identical shaped lug bosses 102,104 and 106 around spaced apart 120 degree of the center vertical axis 105 of shell 100.
In the shell 100, array 10 is vertically located, and in the face of the flat surfaces 110 in vertical direction with miter angle, thereby this flat surfaces is as the sound reflection device.Shown in the schematic cross-section among the accompanying drawing 4D.This layout is similar to the centre, bottom that identical array 10 is horizontally set on shell from acoustics, and the vertical view of alternate embodiments as shown in Figure 5 is described.Vertical array position shown in Fig. 4 D can prevent transducer stack ponding, ice, snow or fragment.
In a unrestriced embodiment, the diameter of each transducer is approximately 3 inches, and array is worked being approximately corresponding to wavelength under 3 inches the frequency.Typical frequency is 4425Hz.The sound of this wavelength be found reflection in atmosphere turbulent flow and thermal gradient and pass through turbulent flow and thermal gradient in the atmosphere, operation is a vital compromise method to acoustic radar.Preferred array is made up of 36 transducers in 7 rows, and all phase shift between row and row are approximately 60 degree (perhaps about 3.75 * 10
-5Second), this has realized wave beam at about 10 degree (being 11.2 degree more specifically) that tilt of the certain altitude from the normal direction of transducer to the transducer plane, the main beam angular breadth of measuring from the main beam axis to half-power point is about 5 degree simultaneously.Beam power has approximately dropped to zero (about 20 degree of total beam angle) at the zero-bit place that approximately becomes 10 degree angles with the wave beam main axis.As preferably, each lug boss in three lug bosses of shell 100 defines the inside surface that roughly is positioned at this zero-bit.Thereby this makes main beam be used to the atmosphere sensing fully when helping interception to suppress the unnecessary emission of non-main beam part and unnecessary return signal.
The preferred implementation of array as shown in Figure 1 has 36 transducers; In array center transducer is not set, although can be provided with.This mainly be because the electron device in the preferred implementation be designed to be positioned at be generally used for integrated circuit that surround sound uses around.Each circuit in these circuit has 3 left passages and 3 right passages respectively, and promptly each circuit has 6 passages.The segment of each of array 60 degree is controlled by a circuit in these circuit just, is used for totally six geometric configuratioies of radiating circuit and the subdivision that electron device all is equal to.Add that the 37th transducer increased the complicacy of radiating circuit design and firmware design greatly for the center of array.Test shows that central loudspeakers does not have big influence to the directivity of equipment, and directivity can improve 3% at most, but may increase by 17% cost and complicacy simultaneously.Therefore, central loudspeakers not being set is to consider the suitable half-way house of cost and functional back.
For the further discussion of application of the present invention and mode of operation, can know understanding by top analysis.Therefore further discussion about application and mode of operation no longer is provided.
Can understand according to above analysis, optimum dimension relation for each parts of the present invention, comprise change in size, material, shape, structure, operating frequency and wavelength, operating function and mode, assembling and use, be conspicuous for a person skilled in the art, and the present invention be intended to comprise with shown in the accompanying drawing with instructions described in all relations that concern equivalence.
Therefore, think that above-mentioned content only set forth principle of the present invention.In addition, owing to be easy to the present invention is carried out the many places modifications and variations to those skilled in the art, definite structure and operation that the present invention is not limited to meaning shown in the literary composition and describes, correspondingly, all suitable modifications and similar scheme can be thought and dropped in the scope that the present invention limited.
Claims (25)
1. transducer array that is used for sodar system, this transducer array comprise a plurality of independently acoustic transducers that are used for to atmosphere emission sound and detect the sound of having been returned by atmospheric reflectance that is sent;
During that wherein said transducer is disposed in is flat basically, roughly hexagonal grid is filled and arranged.
2. transducer array according to claim 1, wherein said transducer array comprises the essentially identical transducers that many rows closely fill, and the described transducer among the adjacent row is offset the only about half of of transducer width each other on the direction perpendicular to described row's longitudinal axis simultaneously.
3. transducer array according to claim 2, wherein said transducer limit and are roughly hexagonal peripheral shape.
4. transducer array according to claim 2, wherein said transducer array is operated, and is spaced apart azimuthal three the continuous wave beams of about 120 degree with generation.
5. transducer array according to claim 4, the described transducer of wherein forming a row is with substantially the same Frequency Synchronization ground operation, and each continuously operation of row be that row with respect to operation instantly carries out all uniformly phase shift, thereby be created in the wave beam that the certain altitude with respect to the plane of described transducer tilts.
6. transducer array according to claim 5, wherein said all phase shift between row and row are approximately 60 degree.
7. transducer array according to claim 4, the half-power point of the angular breadth of wherein said wave beam from the main axis of described wave beam to described wave beam is approximately 5 degree.
8. transducer array according to claim 4, each intrafascicular wave beam of wherein said three continuous waves is launched along the main beam axis, and the main axis of described three wave beams is positioned at substantially the same height place.
9. transducer array according to claim 8, the main axis of wherein said three wave beams are positioned at the height of about 10 degree on the plane from the normal of described transducer to described transducer.
10. transducer array according to claim 9, the main axis of wherein said three wave beams are positioned at the height that begins about 11.2 degree from described normal.
11. having, transducer array according to claim 1, wherein said transducer horn be roughly circular shape of cross section.
12. transducer array according to claim 1, wherein said transducer array comprise 36 transducers at least.
13. transducer array according to claim 12, wherein said transducer is arranged at least seven rows.
14. transducer array according to claim 13, wherein said transducer array limits six limits, and each limit in described six limits all comprises at least four transducers.
15. transducer array according to claim 14, wherein being positioned at after each limit of described transducer array that drains into and comprises five transducers less, whenever draining among three rows after this row comprises six transducers less, after this three row that drains into and comprises five transducers less, and last drains into and comprises four transducers less.
16. transducer array according to claim 1, wherein said transducer array is operated, to produce a plurality of essentially identical wave beams.
17. transducer array according to claim 16, the half-power point of the angular breadth of each wave beam in the wherein said wave beam from the main axis of described wave beam to described wave beam is approximately 5 degree.
18. transducer array according to claim 1, the effective coverage of wherein said transducer comprise about 90% of array region at least.
19. transducer array according to claim 1, wherein said transducer is a tweeter horn.
20. transducer array according to claim 19, wherein said transducer limits a circular cross section.
21. transducer array according to claim 20, the diameter of wherein said transducer are about 3 inches.
22. transducer array according to claim 1, wherein said transducer has the plastics cone.
23. transducer array according to claim 22, the cone of wherein said transducer is made by polycarbonate.
24. a transducer array that is used for sodar system, this transducer array comprise a plurality of independently acoustic transducers of the sound of having been returned by atmospheric reflectance that is used for to atmosphere emission sound and is used for that sensing sends;
The effective coverage of wherein said transducer comprises about 90% of array region.
25. a transducer array that is used for sodar system, this transducer array comprise a plurality of independently acoustic transducers of the sound of having been returned by atmospheric reflectance that is used for to atmosphere emission sound and is used for that sensing sends;
During that wherein said transducer is disposed in is flat substantially, roughly hexagonal grid is filled and arranged, described layout limits six limits and comprises the essentially identical transducer that many rows closely fill, simultaneously the described transducer among the adjacent row is offset the only about half of of transducer width each other on the direction perpendicular to described row's longitudinal axis, and at least three transducers limit described grid and fill each limit in six limits arranging;
Wherein said transducer array is operated, be spaced apart azimuthal three continuous, the substantially the same and symmetrical wave beams of 120 degree with generation, described operation comprises the described transducer of forming a row with substantially the same Frequency Synchronization ground operation, simultaneously each continuously operation of row be that row with respect to operation instantly carries out all uniformly phase shift, thereby be created in the wave beam that the certain altitude with respect to the plane of described transducer tilts.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86442906P | 2006-11-06 | 2006-11-06 | |
| US60/864,429 | 2006-11-06 | ||
| US94130207P | 2007-06-01 | 2007-06-01 | |
| US60/941,302 | 2007-06-01 | ||
| US11/934,915 US8009513B2 (en) | 2006-11-06 | 2007-11-05 | Transducer array arrangement and operation for sodar application |
| US11/934,915 | 2007-11-05 | ||
| PCT/US2007/083690 WO2008108894A2 (en) | 2006-11-06 | 2007-11-06 | Transducer array arrangement and operation for sodar applications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101558324A true CN101558324A (en) | 2009-10-14 |
| CN101558324B CN101558324B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800412495A Expired - Fee Related CN101558324B (en) | 2006-11-06 | 2007-11-06 | Transducer array arrangement and operation for sodar applications |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101558324B (en) |
| ZA (1) | ZA200902678B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199519A (en) * | 2016-07-26 | 2016-12-07 | 山东省科学院海洋仪器仪表研究所 | A kind of ultra-short baseline five primitive solid space basic matrix and hydrolocation method thereof |
| CN106526571A (en) * | 2016-11-08 | 2017-03-22 | 深圳市速腾聚创科技有限公司 | Planar phased array radar and planar phased array radar controlling method |
| CN110687526A (en) * | 2019-10-30 | 2020-01-14 | 海鹰企业集团有限责任公司 | Method for reducing directional fluctuation of wide-beam transmitting transducer and transducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509304A (en) * | 1994-08-10 | 1996-04-23 | Radian Corporation | Phased array acoustic antenna system |
| US5808967A (en) * | 1996-10-07 | 1998-09-15 | Rowe-Deines Instruments Incorporated | Two-dimensional array transducer and beamformer |
| US6384516B1 (en) * | 2000-01-21 | 2002-05-07 | Atl Ultrasound, Inc. | Hex packed two dimensional ultrasonic transducer arrays |
-
2007
- 2007-11-06 CN CN2007800412495A patent/CN101558324B/en not_active Expired - Fee Related
-
2009
- 2009-04-17 ZA ZA200902678A patent/ZA200902678B/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106199519A (en) * | 2016-07-26 | 2016-12-07 | 山东省科学院海洋仪器仪表研究所 | A kind of ultra-short baseline five primitive solid space basic matrix and hydrolocation method thereof |
| CN106526571A (en) * | 2016-11-08 | 2017-03-22 | 深圳市速腾聚创科技有限公司 | Planar phased array radar and planar phased array radar controlling method |
| CN106526571B (en) * | 2016-11-08 | 2020-05-22 | 深圳市速腾聚创科技有限公司 | Planar phased array radar and planar phased array radar control method |
| CN110687526A (en) * | 2019-10-30 | 2020-01-14 | 海鹰企业集团有限责任公司 | Method for reducing directional fluctuation of wide-beam transmitting transducer and transducer |
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| ZA200902678B (en) | 2010-04-28 |
| CN101558324B (en) | 2012-10-17 |
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