CN102324228A - Infrasonic wave generator based on laser-induced shock waves - Google Patents
Infrasonic wave generator based on laser-induced shock waves Download PDFInfo
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- CN102324228A CN102324228A CN 201110168608 CN201110168608A CN102324228A CN 102324228 A CN102324228 A CN 102324228A CN 201110168608 CN201110168608 CN 201110168608 CN 201110168608 A CN201110168608 A CN 201110168608A CN 102324228 A CN102324228 A CN 102324228A
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Abstract
The invention relates to an infrasonic wave generator base on laser-induced shock waves, which comprises a high-energy ultrashort pulse laser, a focusing system, a working medium-jetting system and a flaring tube. The high-energy ultrashort pulse laser interacts with the substance jetted by the working medium-jetting system, so that a working medium can be broken down to form plasma, the plasma explodes to generate a shock wave, the shock wave pushes the air in the flaring tube to move at extremely high speed along the axial direction of the flaring tube, the air of the orifice is excited by the shock wave, so that infrasonic waves with different frequencies can be generated, and the intensity of the infrasonic waves can be changed by changing the energy of the pulse laser or changing the working medium. The infrasonic wave generator has the characteristics of adjustable frequency and power, high maneuverability and the like. Since the infrasonic waves have extremely strong penetrating ability, the infrasonic waves can easily penetrate a building to cause a physiological effect on lives in the building, and by regulating frequency and power, the infrasonic wave generator can produce different physiological effects on lives.
Description
Technical field
The present invention relates to a kind of infrasonic wave generating device, refer in particular to a kind of infrasonic wave generating means based on laser blast wave.
Background technology
Infrasonic wave is meant the sound wave of frequency less than 20Hz (hertz), and it can't be heard by people's ear.Vibration frequency that human body viscera is intrinsic and undersonic frequency be similar (0.01～20 hertz); If external undersonic frequency is similar or identical with the vibration frequency of body internal organ; Will cause " resonance " of human body viscera, all there is trickle and rhythmical pulsation in the partes corporis humani position, and this ripple frequency is generally 2～16Hz; Like internal organ is 4～6Hz, and head is 8～12Hz etc.These natural frequencys of human body just in time in infrasonic frequency range, in case powerful infrasonic wave acts on human body, can cause the resonance that human body is strong, thereby cause great injury.Make that the people produces dizziness, agitation, tinnitus, a series of symptoms of feeling sick or the like.Particularly when intrinsic vibration frequency such as people's abdominal cavity, thoracic cavity is consistent with external undersonic frequency, more be prone to cause the resonance of human body viscera, make human body viscera impaired and get killed.Experiment showed, 10 hertz 135 decibels infrasonic wave abroad, can make the internal organ of small white mouse be on the verge of necrosis; 0.5 the infrasonic wave that hertz is about 170 decibels can make the expiratory dyspnea of dog, even stop.
Infrasonic wave has extremely strong penetration power, not only can penetrate atmosphere, seawater, soil, and can also penetrate the buildings that firm reinforced concrete constitutes, even tank, warship, submarine and aircraft all are nothing difficult.Infrasonic velocity of propagation and heard sound phase of wave are same, because the infrasonic wave frequency is very low.Atmosphere is very little to its absorption, and when infrasonic wave was propagated several thousand kms, its absorption was less than ten thousand/and several, so the distance that its is propagated is far away, can pass to beyond a few km to tens ten thousand kms.In August, 1883, the carat Kato volcanic explosion between southern Sumatra and the Java Island, the infrasonic wave of generation is around the earth three circles, and more than 10 ten thousand kilometers of total lengths are lasted 108 hours.1961, the Soviet Union in the Arctic Circle newly the conduct nuclear test infrasonic wave that evokes of island changeed 5 circles around the earth.The sound wave of 7000Hz can stop with a piece of paper, and the infrasonic wave of 7Hz can penetrate tens meters thick reinforced concrete.
Infrasonic weapon is exactly that a kind of ability transmission frequency be lower than 20 hertz infrasonic wave, and itself and human body are resonated, and causes the organ of resonance or position to be subjected to displacement, to be out of shape even break, thereby causes damage so that dead advanced technology weapon.It is disguised strong that infrasonic weapon has, and velocity of propagation is fast, propagation distance is far away, and penetration power is strong, free from environmental pollution with destroy characteristics such as facility.But mostly the infrasonic weapon of current development is disposable, can not reuse, and be difficult to its intensity of control.
The present invention proposes a kind of infrasonic wave generating means, characteristics such as it has frequency, adjustable power, and maneuverability is good based on laser blast wave.Because infrasonic wave has extremely strong penetration capacity; It can pass buildings easily, the life entity of the inside is caused physiologic effect, through regulating frequency, power; Can produce different physiologic effect to biosome; Gently then dizzy, heavy then fatal, be expected to obtain excellent effect in anti-terrorism fields such as the hostage kidnap.
Summary of the invention
The object of the present invention is to provide a kind of infrasonic wave generating means based on laser blast wave, the device of embodiment of the present invention comprises high-energy ultrashort pulse laser, focusing system, actuating medium ejection system, flaring pipe.Its principle of this device is: the high-energy ultra-short pulse laser is with the matter interaction that sprays in the actuating medium ejection system; Actuating medium is punctured form plasma; The plasma blast forms shock wave (plasma inside can produce the pressure of several GPa); Along the flaring pipe axially-movable, when the repetition frequency of pulse laser changed between 1 ~ 20HZ, shock wave encouraged the gas of the mouth of pipe to air in the shock wave promotion oviduct with high speed; Just formed the different infrasonic wave of frequency, energy that can be through changing pulse laser or change actuating medium and change infrasonic intensity.
Apparatus of the present invention comprise laser instrument, focus lamp, nozzle, cylindrical case, division board, actuating medium, actuating medium nozzle and flaring pipe; Laser instrument is the high-energy ultrashort pulse laser; The laser alignment focusing system of laser instrument, focus lamp and division board are located at the cylindrical case two ends and are formed an insulated chamber, and nozzle is located at the end near focus lamp on the cylindrical case, and nozzle sprays pressurized air to focus lamp; Offer bellmouth in the middle of the division board; Division board is provided with parabola with respect to the outside of insulated chamber; Paraboloidal focus overlaps with the focus of focus lamp, and the division board outside connects flaring pipe, and flaring pipe is provided with the actuating medium nozzle; Paraboloidal focus is pointed in the outlet of actuating medium nozzle, and actuating medium sprays to paraboloidal focus through the actuating medium nozzle.
Nozzle is blown and is protected focus lamp to avoid the pollution of splashings, and division board is used for guaranteeing moving along the hydraucone direction after most plasmas blasts.
The high-energy ultrashort pulse laser can make actuating medium puncture after it focuses on, and repetition frequency can reach 1 ~ 20HZ.
Actuating medium must have the higher absorption rate to high energy pulse laser, can be powder, also can be the liquid of atomizing.Change the different working medium, can obtain the plasma detonation wave of different-energy, thereby change infrasonic intensity.
Flaring pipe is used for guaranteeing that shock wave institute produce power is concentrated to a direction propagation.
Infrasonic wave is to be excited in the plasma blast that actuating medium produced by laser action, can change infrasonic frequency and intensity through repetition frequency and the intensity that changes high energy pulse laser, thereby life entity is produced different physiologic effect.
The division board front end face is a parabolic, and to being parallel to the motion of the tubular axis heart, the rear end face center of division board has tapered openings with better reflection plasma, is used for through the laser beam after focusing on, and also can prevent that actuating medium from getting into separate cavities simultaneously.
Generating device of laser of the present invention can separate with the infrasonic wave generating means, realizes the long-distance transmissions pulsed laser energy, improves its maneuverability greatly.
Advantage of the present invention is:
1) shock wave energy of laser plasma generation is high, can promote air with high velocity fluctuation, therefore, can produce the very high infrasonic wave of the sound intensity.
2) repetition frequency of pulse laser can obtain the infrasonic wave of different frequency when 1 ~ 20HZ changes.
3) because plasma is limited in exploding in the flaring pipe, so explosion energy concentrates on the same direction and discharges, and can improve infrasonic intensity.
4) because the directivity of laser is splendid, can long-distance communications, therefore, laser beam emitting device is separated with the infrasonic wave generating means, improve the maneuverability of this infrasonic wave generating means greatly.
Description of drawings
Fig. 1 is the structural representation that the present invention is based on the infrasonic wave generating means of laser blast wave.
Among the figure, 1: laser instrument, 2: laser beam, 3: focus lamp, 4: nozzle, 5: cylindrical case, 6: division board, 7: actuating medium, 8: actuating medium nozzle, 9: flaring pipe.
Embodiment
Below in conjunction with description of drawings the present invention, but do not limit the present invention.
As shown in Figure 1, at first, nozzle 4 ejection pressurized air form certain pressure in insulated chamber, be used for protecting focus lamp 3; Actuating medium nozzle 8 ejection actuating mediums 7; Laser instrument 1 sends high-energy ultra-short pulse laser bundle 2, after focusing on through focus lamp 3, passes division board 6 bellmouths; Act on the actuating medium 7 of nozzle 8 ejections then; Actuating medium is punctured in flaring pipe 9, produce plasma blast, the inner pressure that produces several GPa of plasma, the gas in the plasma blast impulse wave excitation oviduct of formation; When the pulsed frequency of laser instrument 1 when 1 ~ 20HZ changes, just form the infrasonic wave of different frequency.
Claims (2)
1. infrasonic wave generating means based on laser blast wave; It is characterized in that, comprise laser instrument (1), focus lamp (3), nozzle (4), cylindrical case (5), division board (6), actuating medium (7), actuating medium nozzle (8) and flaring pipe (9); Said laser instrument (1) is the high-energy ultrashort pulse laser; Laser instrument (1) emitted laser is aimed at focus lamp (3); Said focus lamp (3) and division board (6) are located at cylindrical case (5) two ends and are formed an insulated chamber; Said nozzle (4) is located at the end near focus lamp (3) on the cylindrical case (5), and nozzle (4) is to focus lamp (3) spray pressurized air; Offer bellmouth in the middle of the said division board (6); Division board (6) is provided with parabola with respect to the one side in the insulated chamber outside; Paraboloidal focus overlaps with the focus of focus lamp (3), and said division board (6) outside connects flaring pipe (9), and flaring pipe (9) is provided with actuating medium nozzle (8); Paraboloidal focus is pointed in the outlet of actuating medium nozzle (8), and said actuating medium (7) sprays to paraboloidal focus through actuating medium nozzle (8).
2. a kind of infrasonic wave generating means based on laser blast wave according to claim 1 is characterized in that the repetition frequency of the pulse laser of said laser instrument (1) is 1 ~ 20HZ.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101686081A CN102324228B (en) | 2011-06-22 | 2011-06-22 | Infrasonic wave generator based on laser-induced shock waves |
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| CN2011101686081A CN102324228B (en) | 2011-06-22 | 2011-06-22 | Infrasonic wave generator based on laser-induced shock waves |
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| CN102324228A true CN102324228A (en) | 2012-01-18 |
| CN102324228B CN102324228B (en) | 2012-08-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109859735A (en) * | 2019-02-20 | 2019-06-07 | 西安闪光能源科技有限公司 | A kind of plasma low-frequency sound source and its timing control synthetic method |
| CN111988900A (en) * | 2020-07-21 | 2020-11-24 | 中国空气动力研究与发展中心低速空气动力研究所 | Application of plasma exciter and infrasonic wave generating method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638533A (en) * | 1996-07-17 | 2005-07-13 | 美国技术公司 | Sound heterodyne apparatus and method |
| CN101363698A (en) * | 2007-08-08 | 2009-02-11 | 杨伦华 | Infrasonic wave generator |
| JP2009281892A (en) * | 2008-05-22 | 2009-12-03 | Kochi Univ Of Technology | Infrasound measuring sensor |
| CN101871807A (en) * | 2010-04-16 | 2010-10-27 | 华南师范大学 | Infrasonic wave detection device and method |
-
2011
- 2011-06-22 CN CN2011101686081A patent/CN102324228B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638533A (en) * | 1996-07-17 | 2005-07-13 | 美国技术公司 | Sound heterodyne apparatus and method |
| CN101363698A (en) * | 2007-08-08 | 2009-02-11 | 杨伦华 | Infrasonic wave generator |
| JP2009281892A (en) * | 2008-05-22 | 2009-12-03 | Kochi Univ Of Technology | Infrasound measuring sensor |
| CN101871807A (en) * | 2010-04-16 | 2010-10-27 | 华南师范大学 | Infrasonic wave detection device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109859735A (en) * | 2019-02-20 | 2019-06-07 | 西安闪光能源科技有限公司 | A kind of plasma low-frequency sound source and its timing control synthetic method |
| CN109859735B (en) * | 2019-02-20 | 2022-11-08 | 西安闪光能源科技有限公司 | Plasma low-frequency sound source and time sequence control synthesis method thereof |
| CN111988900A (en) * | 2020-07-21 | 2020-11-24 | 中国空气动力研究与发展中心低速空气动力研究所 | Application of plasma exciter and infrasonic wave generating method and device |
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| CN102324228B (en) | 2012-08-15 |
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