CN102098610B - Loudspeaker unit, loudspeaker arrangement and directed sound wave scarer - Google Patents
Loudspeaker unit, loudspeaker arrangement and directed sound wave scarer Download PDFInfo
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Abstract
The invention discloses a kind of loudspeaker unit, loudspeaker arrangement and directed sound wave scarer.Wherein, loudspeaker arrangement comprises mounting base; One or more loudspeaker unit, loudspeaker unit comprises: reflective radiator; Loud speaker, is arranged in the cavity of reflective radiator; Preposition reflecting element, is arranged on the front of loud speaker.On the other hand, directed sound wave scarer comprises: source of sound supply circuit module, produces one or more first and drives bird audio signal; Audio frequency processing circuit module, drives bird audio signal to first and carries out signal transacting, to obtain the audio data stream of the first digital modulation; Power processing circuit module, does to amplify and filtering process to the audio data stream of the first digital modulation, and converts second to and drive bird audio signal; Loudspeaker arrangement, drives bird audio signal for exporting second.By the present invention, the effect of effectively driving bird at a distance can be reached.
Description
Technical field
The present invention relates to sound wave to produce and application, in particular to a kind of loudspeaker unit, loudspeaker arrangement and directed sound wave scarer.
Background technology
Along with people's protection of the environment, love bird, protect bird consciousness enhancing; birds quantity increases year by year; the scope of mankind's activity simultaneously constantly expands, and the natural environment of make applicable birdife, perch, multiplying significantly reduces, the ideal place that airport just becomes birdife, perches, multiplies.Therefore the event that birds jeopardize flight safety increases year by year, and the loss caused is increasing.Once there is bird to hit event, gently then cause certain economic loss, heavy then fatal crass.
In existing correlation technique, when birds fly infrared detection area, this infrared signal is converted to the signal of telecommunication by pyroelectricity element, drives directed sound wave warning system to send and drives bird sound, the sphere of action of device is 16m, effectively can drive away the birds on electric power pylon top.
In existing correlation technique, when birds enter into protection zone, radar signal module is by the information feed back that detects to supersonic wave bird driving module, and supersonic wave bird driving module sends ultrasonic wave, has good effect on driving birds, but the scope of driving bird is not more than 20m.Disclose a kind of directed sound wave scarer at present, main feature of its invention is can long-range reception instruction, and volume can change at random, and the audio repository of storage can upgrade in time, but drives bird scope and be not more than 20m.
Airport bird scaring equipment at present for correlation technique is all confined in smaller sphere of action, cannot implement the problem of driveing at a distance, not yet propose effective solution at present to whole airfield runway or the birds risen and fallen on navigation channel.
Summary of the invention
Airport bird scaring equipment for correlation technique is all confined in smaller sphere of action, the problem of driveing at a distance cannot be implemented to whole airfield runway or the birds risen and fallen on navigation channel, not yet propose effective solution and propose the present invention at present, for this reason, main purpose of the present invention is to provide a kind of loudspeaker unit, loudspeaker arrangement and directed sound wave scarer, to solve the problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of loudspeaker unit, comprise: reflective radiator, this reflective radiator comprises the reflective side walls of the taper of opening wide toward the front and is connected to the rear wall of reflective side walls rear end, forms cavity between reflective side walls and rear wall; Loud speaker, is arranged in the cavity of reflective radiator, the horn mouth of loud speaker towards reflective radiator rear wall and and have preset distance between the rear wall of reflective radiator; Preposition reflecting element, is arranged on the front of loud speaker and loud speaker tightly covers preposition reflecting element.
Further, preposition reflecting element is reflector.
Further, the open end of reflector towards the rear wall of reflective radiator, and and has preset distance between rear wall.
Further, the middle part of the rear wall of reflective radiator has towards the phase plug of loud speaker.
Further, loudspeaker unit also comprises annular fixing member, this annular fixing member comprises annular slab and is arranged on the footing of annular slab side, and annular fixing member is fixed on the rear wall of reflective radiator by footing, makes the rear wall of annular slab and reflective radiator leave space.
Further, the height of the footing of annular fixing member is identical with the height of the phase plug of the rear wall of reflective radiator.
Further, the reflective side walls of reflective radiator is exponential type curved surface.
Provide a kind of loudspeaker arrangement according to another aspect of the present invention, this device comprises: mounting base; Loudspeaker unit, is arranged on mounting base, and arranges towards predetermined direction.
Further, mounting base is plate-like, has multiple installing hole, is separately installed with a corresponding loudspeaker unit in each installing hole, and each loudspeaker unit is all arranged towards the first side of mounting base; Loudspeaker arrangement also comprises reticular lamina, is arranged on the first side of mounting base, covers the front of each loudspeaker unit.
Further, the installing hole on mounting base is through hole; Loudspeaker arrangement also comprises cover plate, and be arranged on second side relative with the first side of mounting base, cover the rear of each loudspeaker unit, the outer surface of cover plate is provided with double handle.
Further, what reflective radiator mutual spacing was less than or equal to that loudspeaker arrangement exports drives the most long wavelength's of bird audio signal 1/4th.
Provide a kind of directed sound wave scarer according to another aspect of the present invention, this directed sound wave scarer comprises the above-mentioned loudspeaker arrangement of above any one.
Further, this directed sound wave scarer also comprises: source of sound supply circuit module, produces one or more first and drives bird audio signal; Audio frequency processing circuit module, drives bird audio signal to first and carries out signal transacting, to obtain the audio data stream of the first digital modulation; Power processing circuit module, does to amplify and filtering process to the audio data stream of the first digital modulation, and converts second to and drive bird audio signal; Loudspeaker arrangement, drives bird audio signal for exporting second; Power circuit block, is connected with audio frequency processing circuit module, and realizes power management.
Further, audio frequency processing circuit module comprises: AD converter, carrying out digital-to-analogue conversion, obtaining the audio data stream of the second digital modulation for driving bird audio signal to first; Audio frequency DSP, for carrying out shaping to the audio data stream waveform of the second digital modulation, converting the PCM signal of audio data stream to pwm signal, completing the setting to pwm signal parameter simultaneously, to obtain the audio data stream of the first digital modulation; Programmable logic device (CPLD), for obtaining the audio data stream of the first digital modulation, and completes and controls the audio data stream communication channel delay of the first digital modulation.
Further, Power processing circuit module, comprising: MOSFET power tube, and the bird audio data stream of driving of the first digital modulation is carried out power amplification, drives bird audio data stream to obtain after amplification; Low pass filter, carries out filtering to the bird audio data stream of driving after amplifying, drives bird audio signal to obtain second; Second drives bird audio signal exports via loudspeaker arrangement.
Further, source of sound supply circuit module also comprises Audio storage unit, and first in Audio storage unit drives bird audio signal for prerecord or USB flash disk inputs immediately.
Further, second to drive bird audio signal acoustic pressure be 160dB, and effectively driving bird distance is 3000m, and institute frequency acoustic wave beam angle of pronouncing is less than or equal to 10 °.
By the present invention, have employed a kind of loudspeaker unit, loudspeaker arrangement and directed sound wave scarer: wherein, loudspeaker arrangement comprises mounting base; One or more loudspeaker unit, loudspeaker unit comprises: reflective radiator; Loud speaker, is arranged in the cavity of reflective radiator; Preposition reflecting element, is arranged on the front of loud speaker.On the other hand, directed sound wave scarer comprises: source of sound supply circuit module, produces one or more first and drives bird audio signal; Audio frequency processing circuit module, drives bird audio signal to first and carries out signal transacting, to obtain the audio data stream of the first digital modulation; Power processing circuit module, does to amplify and filtering process to the audio data stream of the first digital modulation, and converts second to and drive bird audio signal; Loudspeaker arrangement, drives bird audio signal for exporting second; Power circuit block, be connected with audio frequency processing circuit module, solve airport bird scaring equipment and be all confined in smaller sphere of action, cannot implement to whole airfield runway or the birds risen and fallen on navigation channel the problem that remote orientation drives, and then reach the effect of effectively driving bird at a distance.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the loudspeaker unit generalized section according to the embodiment of the present invention;
Fig. 2 is reflective radiator structure and generalized section in the loudspeaker arrangement according to the embodiment of the present invention;
Fig. 3 is annular fixing member structural representation in the loudspeaker unit according to the embodiment of the present invention;
Fig. 4 is annular fixing member generalized section in the loudspeaker unit according to the embodiment of the present invention;
Fig. 5 is the loudspeaker arrangement structural representation according to the embodiment of the present invention;
Fig. 6 is the structural principle schematic diagram of the directed sound wave scarer according to the embodiment of the present invention;
Fig. 7 is audio frequency processing circuit module according to the embodiment of the present invention and Power processing circuit resume module schematic flow sheet;
Fig. 8 is the directed sound wave scarer source of sound supply circuit module diagram according to the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the loudspeaker unit generalized section according to the embodiment of the present invention, and Fig. 2 is reflective radiator structure and generalized section in the loudspeaker arrangement according to the embodiment of the present invention.Shown in composition graphs 1 and Fig. 2: this loudspeaker unit comprises: reflective radiator 11, it comprises the reflective side walls 111 of the taper of opening wide toward the front and is connected to the rear wall 112 of reflective side walls rear end, forms cavity 113 between reflective side walls 111 and rear wall 112; Loud speaker 14, is arranged in the cavity 113 of reflective radiator 11; Preposition reflecting element 15, is arranged on the front of loud speaker 14.
In the above embodiment of the present invention, preposition reflecting element 15 can be reflector.As shown in Figure 1, the open end of reflector towards the rear wall 112 of reflective radiator 11, and and has preset distance between rear wall 112.
Preferably, the middle part of the rear wall 112 of reflective radiator 11 has towards the phase plug 112a of loud speaker, and this phase plug 112a is a surperficial projection for hyperbolic-type.
Fig. 3 is annular fixing member structural representation in the loudspeaker unit according to the embodiment of the present invention.This loudspeaker unit also comprises annular fixing member 13, this annular fixing member 13 comprises annular slab 132 and is arranged on the footing 131 of annular slab side, annular fixing member 13 is fixed on the rear wall 112 of reflective radiator 11 by footing 131, makes annular slab 132 leave space with the rear wall 112 of reflective radiator 11.
Fig. 4 is annular fixing member generalized section in the loudspeaker unit according to the embodiment of the present invention.Composition graphs 1 is with shown in Fig. 4, and the height of the footing 131 of annular fixing member 13 is identical with the height of the phase plug 112a of the rear wall 112 of reflective radiator 11.
Specific embodiments of the invention are as follows: the reflective side walls 111 of reflective radiator 11 forms cavity 113 with the rear wall 112 of reflective side walls rear end; Loud speaker 14, is arranged in the cavity 113 of reflective radiator 11, and the horn mouth of loud speaker 14 is towards the rear wall 112 of reflective radiator; The reflective side walls 111 of reflective radiator is exponential type curved surface; The projection that it be a surface is hyperbolic-type that the middle part of the rear wall 112 of reflective radiator has towards the phase plug 112a of loud speaker 14, phase plug 112a.Annular fixing member comprises annular slab 132 and is arranged on the footing 131 of annular slab 132 side, and annular fixing member 13 is fixed on the rear wall 112 of reflective radiator by footing 131, makes the rear wall 112 of annular slab and reflective radiator leave space.The height of footing 131 is identical with the height of the phase plug 112a of the rear wall 112 of reflective radiator.
In the above embodiment of the present invention, composition graphs 1 and Fig. 2, phase plug 112a coaxial line bottom annular fixing member 13 and reflective radiator, the horn mouth of loud speaker 14 is placed in the top of reflective radioactive phase plug 112a by annular fixing member 13 by annular slab 132, ensure that the venturi that the sound wave that loud speaker sends is formed by the reflective side walls 111 of reflective radiator and the rear wall 112 of reflective radiator sends; Loud speaker 14 preferably adopts magneto-electric HiFi Speakers, and loud speaker 14 other end tightly covers preposition reflector 15, and and has preset distance between the rear wall 112 of reflective radiator.Preposition reflector 15 can be reflector, and its Main Function is to control the consistency of sound field and fixing loudspeaker signal line.
Fig. 5 is the loudspeaker arrangement structural representation according to the embodiment of the present invention, and this loudspeaker arrangement 1 includes loudspeaker unit as above, and as shown in Figure 5, this loudspeaker arrangement 1 also includes mounting base 12, and it is plate-like, has multiple installing hole.The material of mounting base 12 can be the nonmetallic materials with radiation proof and anti-flaming function, also can be titanium alloy or stainless steel.Installing hole on mounting base is through hole, is separately installed with a corresponding loudspeaker unit in each installing hole, and each loudspeaker unit is all arranged towards the first side of mounting base.Loudspeaker unit or rectangular-shapedly can be arranged in mounting base according to ring-type, preferred mode for by one, center loudspeaker unit, periphery six loudspeaker unit close-packed arrays.The most long wavelength's of bird audio signal that what the mutual spacing of each loudspeaker unit was less than or equal to that described loudspeaker arrangement 1 exports drive 1/4th.Loudspeaker arrangement 1 also comprises reticular lamina 16, and be arranged on the first side of mounting base 12 by clench nail 17, cover the front of each loudspeaker unit, the mesh diameter of reticular lamina 16 preferentially selects 1-3mm.Loudspeaker arrangement 1 also comprises cover plate 18, be arranged on second side relative with the first side of mounting base 12, cover the rear of each loudspeaker unit, the outer surface of described cover plate is provided with double handle 19, and operating personnel regulate pitching and the azimuth of loudspeaker arrangement 1 by holding double handle 19.
Fig. 6 is the structural principle schematic diagram of the directed sound wave scarer according to the embodiment of the present invention.As shown in Figure 6, this device can comprise: source of sound supply circuit module 4, drives bird audio signal for generation of one or more first; Audio frequency processing circuit module 3, drives bird audio signal to first and carries out signal transacting, to obtain the audio data stream of the first digital modulation; Power processing circuit module 2, for doing the audio data stream of the first digital modulation to amplify, after filtering process, and converts second to and drives bird audio signal; Loudspeaker arrangement 1, drives bird audio signal for exporting second.This device also comprises power circuit block 5,220V alternating voltage is converted into the direct voltage of 48V by power circuit block 5, and then regeneration 24V, 12V, 5V and 3V DC power supply, supply loudspeaker arrangement 1, audio frequency processing circuit module 3, Power processing circuit module 2 and source of sound supply circuit module 4 respectively.
State on the invention in embodiment, by the directed sound wave scarer be made up of loudspeaker arrangement 1, Power processing circuit module 2, audio frequency processing circuit module 3, source of sound supply circuit module 4 and power circuit block 5, the bird signal that drives that airport bird scaring equipment is sent is not confined in smaller sphere of action, remote orientation can be implemented to whole airfield runway or the birds risen and fallen on navigation channel to drive, and then reach the effect of effectively driving bird at a distance.
Concrete, the workflow of the above embodiment of the present invention is introduced as follows in detail, first by source of sound supply circuit module 4 produce for different regions, Various Seasonal and different birds first drive bird audio signal, source of sound supply circuit module 4 can provide prerecord first drive bird audio signal, also can immediately input all kinds of first by USB flash disk and drive bird audio signal.Then operation amplifier process is carried out by the audio signal of audio frequency processing circuit module 3 pairs of source of sound supply circuit module 4 inputs, carry out optimum configurations simultaneously, parallel computation and communication channel delay, to obtain the audio data stream of the first digital modulation, the audio data stream of this first digital modulation is supplied to Power processing circuit module 2 and amplifies the most at last, filtering, convert second again to and drive bird audio signal, this second is driven bird audio signal and is exported by loudspeaker arrangement 1 with the form of analog signal, drive bird audio signal acoustic pressure through second of loudspeaker arrangement 1 output and can reach 160dB, effectively drive bird distance and can reach 3000m, frequently acoustic wave beam angle of pronouncing be less than or equal to 10 °.
Fig. 7 is audio frequency processing circuit module according to the embodiment of the present invention and Power processing circuit resume module schematic flow sheet.Audio frequency processing circuit module 3 comprises: AD converter, carrying out digital-to-analogue conversion, obtaining the audio data stream of the second digital modulation for driving bird audio signal to first; Audio frequency DSP, for carrying out shaping to the audio data stream waveform of the second digital modulation, converting the audio data stream PCM signal of the second digital modulation to pwm signal, completing the setting to pwm signal parameter simultaneously, to obtain the audio data stream of the first digital modulation; Programmable logic device (CPLD), for obtaining the audio data stream of the first digital modulation, and completes and controls the audio data stream communication channel delay of the first digital modulation.Renewal, the broadcasting of audio frequency processing circuit module sound intermediate frequency signal start, stop and selecting by external options button control operation.Power processing circuit module 2 comprises: MOSFET power tube, and the first digital modulation driven the power amplification of bird audio data stream, drives bird audio data stream to obtain after amplification; Low pass filter, conversion amplify after drive bird audio data stream, drive bird audio signal to obtain second; Second drives bird audio signal exports via loudspeaker arrangement 1.
State on the invention in embodiment, audio frequency processing circuit module 3 can become autonomous system separately, also can with Power processing circuit module 2 cascade, realize master-slave control mode.As shown in Figure 7, audio frequency processing circuit module 3 and Power processing circuit module 2 preferably adopt the mode of cascade, and audio frequency processing circuit module 3 is primary module, and Power processing circuit module 2 is from module.This audio frequency processing circuit module 3 control treatment plate provides USB flash disk source of sound input interface 31, input signal obtains the differential signal that can be cascaded to other modules through cascade circuit 32, by when pre-processing module adopts with the subtending port 32 from module, shielding conductor is corresponding to be connected, maximum can cascade 8 modules, namely 64 tunnels export, and can drive bird audio signal like this output to second on multichannel loudspeaker 14.Audio frequency processing circuit module 3 is except the effect having audio frequency amplifier 33 and power for rear class; also provide output interface 35, single-chip microcomputer online updating code interface 36 and optimum configurations interface 37, meanwhile, audio frequency processing circuit module 3 also has short circuit; overload, overheat protector function.Volume controls display module 38 and is designed with volume controlled encoder, by the size regulating encoder to control output volume, and the size of volume is divided into the range intervals of 0 ~ 100 to be shown in the LED screen of volume control display module 38.Audio frequency processing circuit module 3 has for the power circuit block 5 needed for rear end Power processing circuit module 2, and power circuit block 5 adopts the DC-DC of vehicle-mounted level that 48V source of stable pressure is converted to the voltages such as 5V, 3.3V, the 1.8V in Power processing circuit module 2 needed for chip.First drives bird audio signal through audio frequency DSP(such as, D2Audio intelligent audio processor 34) carry out dsp code to complete code conversion, what obtain required digital modulation drives bird audio data stream, send into MOSFET power amplification circuit through small-signal digital driver circuitry and carry out power amplification, finally the bird voice data that drives after amplification is flowed through filter, extract simulation second drives bird audio signal.
Fig. 8 is the directed sound wave scarer source of sound supply circuit module diagram according to the embodiment of the present invention.As shown in Figure 8, this source of sound supply circuit module 4 comprises: main control MCU 41, flash-memory storage system 42, debug i/f circuit 43, power-supply system 45 and output interface 44, in this module, as shown in Figure 7, main control MCU 41 adopts 8 multimedia microprocessor AT89C51SND1C chips, this chip carries the 51 kernel single-chip microcomputers of MPEG I/II-Layer hardware decoder and Human Interface, support the decoding to 8 ~ 320kbps elementary stream, the sampling frequency scope of support is 16 ~ 48kHz.Flash-memory storage system 42 selects the 1GB FLASH storage chip K9F5608U0B of SAMSUNG company.This memory can store the music of 19 hours 128kbp/s, and effect can reach CD Quality.Debug i/f circuit 43 carries out the download of audio-frequency information by USB interface and portable computer, the wail sound that the horrible cry sound that audio-frequency information comprises the sound of birds natural enemy, the bird of prey catches birds, birds are hit by shotgun and explosive sound etc.Renewal, the broadcasting of sound source signal start, stop and selecting by external options button control operation.Power-supply system 45 is connected with power circuit block 5, and first drives bird audio signal is mated with the source of sound input interface 31 of audio frequency processing circuit module 3 by output interface 44.
Directed sound wave scarer of the present invention, can be arranged on the motion platforms such as the box-type equipment that automobile or other power source pull, and forms orientable remote action, motor-driven drives bird equipment on a large scale.
As can be seen from the above description, present invention achieves following technique effect:
For the relevant issues of prior art, loudspeaker unit provided by the invention, loudspeaker arrangement and directed sound wave scarer solve airport bird scaring equipment and are all confined in smaller sphere of action, cannot implement to whole airfield runway or the birds risen and fallen on navigation channel the problem that remote orientation drives, and then reach the effect of effectively driving bird at a distance.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. a loudspeaker unit, is characterized in that, comprising:
Reflective radiator (11), comprises the reflective side walls (111) of the taper of opening wide toward the front and is connected to the rear wall (112) of described reflective side walls rear end, forming cavity (113) between described reflective side walls (111) and described rear wall (112);
Loud speaker (14), is arranged in the cavity (113) of described reflective radiator (11), the horn mouth of described loud speaker towards described reflective radiator rear wall (112) and and have preset distance between the rear wall (112) of described reflective radiator;
Preposition reflecting element (15), is arranged on the front of described loud speaker (14) and described loud speaker (14) tightly covers described preposition reflecting element (15).
2. loudspeaker unit according to claim 1, is characterized in that, described preposition reflecting element (15) is reflector.
3. loudspeaker unit according to claim 2, is characterized in that, the open end of described reflector towards the rear wall (112) of described reflective radiator, and and has preset distance between described rear wall (112).
4. loudspeaker unit according to claim 3, is characterized in that, the middle part of the rear wall (112) of described reflective radiator has towards the phase plug of described loud speaker (112a).
5. loudspeaker unit according to claim 4, it is characterized in that, described loudspeaker unit also comprises: annular fixing member (13), described annular fixing member (13) comprises annular slab (132) and is arranged on the footing (131) of described annular slab (132) side, described annular fixing member (13) is fixed on the rear wall (112) of described reflective radiator by footing (131), makes described annular slab (132) leave space with the rear wall (112) of described reflective radiator.
6. loudspeaker unit according to claim 5, is characterized in that, the height of described footing (131) is identical with the height of the phase plug (112a) of the rear wall (112) of described reflective radiator.
7. loudspeaker unit according to claim 1, is characterized in that, the reflective side walls (111) of described reflective radiator is exponential type curved surface.
8. a loudspeaker arrangement, is characterized in that, comprising:
Mounting base (12);
One or more loudspeaker unit according to any one of claim 1-7, is arranged on described mounting base (12), and arranges towards predetermined direction.
9. loudspeaker arrangement according to claim 8, is characterized in that:
Described mounting base (12), in plate-like, has multiple installing hole, is separately installed with a corresponding described loudspeaker unit in each described installing hole, and each described loudspeaker unit is all arranged towards the first side of described mounting base;
Described loudspeaker arrangement also comprises reticular lamina (16), is arranged on the first side of described mounting base (12), covers the front of each described loudspeaker unit.
10. loudspeaker arrangement according to claim 9, is characterized in that:
Described installing hole on described mounting base (12) is through hole;
Described loudspeaker arrangement also comprises cover plate (18), and be arranged on second side relative with described first side of described mounting base (12), cover the rear of each described loudspeaker unit, the outer surface of described cover plate is provided with double handle (19).
11. loudspeaker arrangements according to claim 9, is characterized in that, what described reflective radiator (11) mutual spacing was less than or equal to that described loudspeaker arrangement exports drives the most long wavelength's of bird audio signal 1/4th.
12. 1 kinds of directed sound wave scarers, is characterized in that, comprising: the loudspeaker arrangement (1) according to any one of claim 8-11.
13. directed sound wave scarers according to claim 12, it is characterized in that, this device also comprises:
Source of sound supply circuit module (4), produces one or more first and drives bird audio signal;
Audio frequency processing circuit module (3), drives bird audio signal to described first and carries out signal transacting, to obtain the audio data stream of the first digital modulation;
Power processing circuit module (2), does to amplify and filtering process to the audio data stream of described first digital modulation, and converts second to and drive bird audio signal;
Power circuit block (5), is connected with described audio frequency processing circuit module (3).
14. directed sound wave scarers according to claim 13, is characterized in that, described audio frequency processing circuit module (3) comprising:
AD converter, carrying out digital-to-analogue conversion for driving bird audio signal to described first, obtaining the audio data stream of the second digital modulation;
Audio frequency DSP, for carrying out shaping to the audio data stream waveform of described second digital modulation, convert the audio data stream PCM signal of described second digital modulation to pwm signal, complete the setting to described pwm signal parameter simultaneously, to obtain the audio data stream of the first digital modulation;
Programmable logic device (CPLD), for obtaining the audio data stream of described first digital modulation, and carries out delays time to control to the passage of the audio data stream of described first digital modulation.
15. directed sound wave scarers according to claim 13, is characterized in that, described Power processing circuit module (2) comprising:
MOSFET power tube, carries out power amplification by the bird audio data stream of driving of described first digital modulation, drives bird audio data stream to obtain after amplification;
Low pass filter, carries out filtering to the bird audio data stream of driving after described amplification, drives bird audio signal to obtain second;
Described second drives bird audio signal exports via described loudspeaker arrangement (1).
16. directed sound wave scarers according to claim 13, is characterized in that, described source of sound supply circuit module (4) also comprises Audio storage unit, and first in described Audio storage unit drives bird audio signal for prerecord or USB flash disk inputs immediately.
17. directed sound wave scarers according to claim 13 or 15, is characterized in that, described second to drive bird audio signal acoustic pressure be 160dB, and effectively driving bird distance is 3000m, and institute frequency acoustic wave beam angle of pronouncing is less than or equal to 10 °.
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| CN201110059912.2A CN102098610B (en) | 2011-03-11 | 2011-03-11 | Loudspeaker unit, loudspeaker arrangement and directed sound wave scarer |
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| CN201110059912.2A CN102098610B (en) | 2011-03-11 | 2011-03-11 | Loudspeaker unit, loudspeaker arrangement and directed sound wave scarer |
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| CN1860869A (en) * | 2006-05-25 | 2006-11-15 | 大连海事大学 | Digital birds-dispersing system used in domestic air-port area |
| CN101014209B (en) * | 2007-01-19 | 2011-06-01 | 电子科技大学 | Full band natural sound effect audio directional loudspeaker |
| CN101115323B (en) * | 2007-08-03 | 2011-04-20 | 席葆树 | Acoustic wave bundle radiator |
| CN202310074U (en) * | 2011-03-11 | 2012-07-04 | 湖南继善高科技有限公司 | Speaker unit, speaker device and directional sound wave bird-scaring device |
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| CN1551679A (en) * | 2003-05-13 | 2004-12-01 | ������������ʽ���� | Loudspeaker device |
| JP2009290357A (en) * | 2008-05-27 | 2009-12-10 | Mk Seiko Co Ltd | Parametric speaker |
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