A long-distance laser intelligent detonation directional audio warning device

Abstract

The present application provides a long-distance laser intelligent detonation directional audio warning device, which includes a shell, a plurality of sound units and a laser unit; the shell includes a bell body and a mounting plate, the bell body has a sound-emitting inner cavity open along one side of the axial direction, the mounting plate seals and covers the opening of the sound-emitting inner cavity, and the sound-emitting inner cavity is arranged in a horizontal bell shape with an inner diameter gradually expanding along the axial direction toward the opening; the sound unit includes an alloy plate, and the sound unit is mounted on the mounting plate; the laser unit is arranged on the end of the bell body opposite to the mounting plate, and the laser beam generated by the laser unit passes through the sound-emitting inner cavity and irradiates the sound unit to generate directional sound waves. The long-distance laser intelligent detonation directional audio warning device provided by the present application has the advantages of high sound wave intensity, long propagation distance and good directivity.

Description

Technical Field

[0001] This application belongs to the technical field of warning devices, and more specifically, relates to a long-distance laser intelligent detonation directional audio warning device. Background Art

[0002] Among these optoelectronic non-lethal devices, there is an electroacoustic weapon that uses high-intensity sound waves to produce a warning effect, namely an audio warning device. However, the common audio warning devices on the market generally use methods such as gunpowder explosion to generate sound waves or electric energy to drive a speaker to produce sound. Not only is the sound intensity small, the sound propagation distance is short, but also the sound propagation angle diverges, resulting in very poor directivity of the sound wave. Although there are audio warning devices developed using technologies such as piezoelectric ceramic arrays on the market that can slightly improve the above problems, in such audio warning devices, due to the low theoretical limit of the peak value of the sound generating unit module, if a better directivity effect is to be achieved, the array area must be increased, resulting in an overly large volume and inconvenient use. At the same time, even if all the sound generating units adopt a multi-layer structure to stack and enhance the vibrating piece, its maximum focal length sound intensity still does not exceed 160 dB. Although it can make the nearby living targets feel uncomfortable, the deterrence to the distant living targets is still limited, and the strongest sound intensity focus point does not exceed 350 meters. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a long-distance laser intelligent detonation directional audio warning device to solve the technical problems in the prior art that the audio warning device has insufficient sound intensity, short propagation distance, and poor directivity.

[0004] To achieve the above purpose, the technical solution adopted in this application is: providing a long-distance laser intelligent detonation directional audio warning device, including:

[0005] A housing, including a bell body and a mounting plate. The bell body has a sounding inner cavity with an open end on one side along the axis. The mounting plate seals the open end of the sounding inner cavity. The sounding inner cavity is arranged in a horizontally placed bell shape with an inner diameter gradually increasing along the axis towards the open end;

[0006] A plurality of sound generating units, each sound generating unit including an alloy plate, and the sound generating units are installed on the mounting plate; and,

[0007] A laser unit, provided at one end of the bell body opposite to the mounting plate. The laser beam generated by the laser unit irradiates on the sound generating unit after passing through the sounding inner cavity to generate a directional sound wave.

[0008] Optionally, the number of the sound generating units is multiple, the multiple sound generating units are distributed on the mounting plate at intervals, and each sound generating unit is detachably and hermetically connected to the mounting plate.

[0009] Optionally, the alloy plate includes a percussion area provided in the middle and an edge area surrounding the percussion area, and the thickness of the percussion area is greater than that of the edge area, and the laser beam irradiates on the percussion area.

[0010] Optionally, the percussion area includes a plurality of ablation areas for the laser beam to irradiate, one of the ablation areas is provided at the center of the percussion area, and the other ablation areas are evenly spaced circumferentially around the ablation area at the center.

[0011] Optionally, the laser beam is a femtosecond pulsed laser beam, the spot diameter range of the laser beam is 2 mm to 35 mm, the alloy plate is circular, and the diameter of the alloy plate is greater than or equal to 4 times the spot diameter of the laser beam.

[0012] Optionally, the mounting plate includes a front plate and a rear plate, the rear plate faces the laser unit, and the outer edges of the front plate and the rear plate are detachably and sealingly connected to the outer edge of the open end of the bell body;

[0013] A first limiting ring groove having the same shape as the alloy plate is provided on the front plate, and a second limiting ring groove having the same shape as the alloy plate is provided on the rear plate; a first fixed limiting tooth is provided on the front plate surface of the alloy plate near the outer edge, and a second fixed limiting tooth is provided on the rear plate surface of the alloy plate near the outer edge;

[0014] The sound generating unit further includes a sealing ring, and a sealing ring is clamped between the first fixed limiting tooth and the first limiting ring groove, and a sealing ring is also clamped between the second fixed limiting tooth and the second limiting ring groove.

[0015] Optionally, a plurality of first fixed limiting teeth are provided on the front plate surface of the alloy plate near the outer edge, and the plurality of first fixed limiting teeth are arranged in a stepped manner in the thickness direction of the alloy plate, and a sealing ring is embedded on each first fixed limiting tooth;

[0016] A plurality of second fixed limiting teeth are provided on the rear plate surface of the alloy plate near the outer edge, and the plurality of second fixed limiting teeth are arranged in a stepped manner in the thickness direction of the alloy plate, and a sealing ring is embedded on each second fixed limiting tooth.

[0017] Optionally, the laser unit includes a laser generator, a light guide tube, a galvanometer assembly, and a lens module; the galvanometer assembly includes a galvanometer;

[0018] A light transmission window is provided on the bell body, and the incident beam emitted by the laser generator sequentially passes through the light guide tube, the galvanometer, and the lens module along the optical path to form a laser beam with a preset spot diameter.

[0019] Optionally, the long-distance laser intelligent detonation directional audio warning device further includes an iodine addition device and an air extraction device respectively arranged on both sides of the bell body; the iodine addition device includes an iodine addition tube extending into the sound generating cavity, and the air extraction device includes an air extraction tube extending into the sound generating cavity.

[0020] Optionally, an anti-corrosion coating is applied on the inner wall of the sound-generating cavity and on the inner surface of the mounting plate facing the laser unit.

[0021] The sound generation principle of the long-distance laser intelligent detonation directional audio warning device provided by this application is as follows: After the laser beam generated by the laser unit passes through the sound-generating cavity, the laser beam is specified to irradiate near the center of the alloy plate for 10 to 20 picoseconds according to a certain algorithm, so as to ablate 1 to 2 nanometers of the surface metal in a single shot and generate a metal mixed plasma cloud; then, the laser beam further irradiates the undiffused plasma cloud for a period of time with a suitable power, such as 3 femtoseconds, thereby forcing the plasma cloud to aggregate and increase in density under the light pressure and then be heated; then, the laser irradiation is terminated. At this time, the high-temperature and high-pressure plasma cloud will rapidly diffuse, thereby generating a detonation effect on the side of the alloy plate close to the sound-generating cavity, and then pushing the alloy plate of the sound-generating unit to vibrate, so as to conduct the energy to the other side of the alloy plate, and finally push the air on the outer surface layer of the alloy plate to emit the energy in the form of longitudinal waves. This method of generating a high-temperature and high-pressure metal plasma cloud through high-energy laser and then causing the plasma cloud to detonate to generate sound waves can generate a huge sound exceeding 220 dBd on the surface of the sound-generating unit, and after beamforming, it can also generate a sound exceeding 190 dB at the direct position at a distance of more than 3 KM. In this way, using the high-intensity sound waves generated in the directional direction and with a long directional propagation distance provided by this long-distance laser intelligent detonation directional audio warning device, functions such as ultra-long-range audio warning, audio information transmission, psychological deterrence, and crowd isolation can be achieved. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic side view of the long-distance laser intelligent detonation directional audio warning device provided by the embodiment of this application;

[0024] Figure 2 It is a rear view of the sound-generating unit in the long-distance laser intelligent detonation directional audio warning device provided by the embodiment of this application;

[0025] Figure 3 It is a partial structural schematic diagram of the mounting plate in the long-distance laser intelligent detonation directional audio warning device provided by the embodiment of this application;

[0026] Figure 4A side view of the sound - generating unit in the long - distance laser - intelligent detonation - oriented audio warning device provided by the embodiments of the present application;

[0027] Figure 5 It is Figure 4 An enlarged schematic view of part A in

[0028] Explanation of the reference numerals in the attached drawings:

[0029] Detailed implementation manners

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the following further details the present application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It also should be noted that the orientation terms such as left, right, up and down in the embodiments of the present application are only relative concepts to each other or are referenced based on the normal use state of the product, and should not be considered restrictive.

[0033] The embodiments of the present application are described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0034] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless specifically defined otherwise.

[0036] In this application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] An embodiment of this application provides a long-distance laser intelligent detonation directional audio warning device.

[0038] Please refer to Figure 1 、 Figure 2 and Figure 4 , in an embodiment, the long-distance laser intelligent detonation directional audio warning device includes a housing, a plurality of sound generating units 200, and a laser unit 300. Among them, the housing includes a bell body 110 and a mounting plate 120. The bell body 110 has a sound generating inner cavity 130 that is open on one side along the axis. The mounting plate 120 seals and covers the opening of the sound generating inner cavity 130. The sound generating inner cavity 130 is arranged in a horizontally placed bell shape with an inner diameter gradually increasing along the axis towards the opening; the sound generating unit 200 includes an alloy plate 210, and the sound generating unit 200 is installed on the mounting plate 120; the laser unit 300 is provided at one end of the bell body 110 opposite to the mounting plate 120. The laser beam generated by the laser unit 300 irradiates on the sound generating unit 200 after passing through the sound generating inner cavity 130 to generate a directional sound wave.

[0039] Based on this structural design, in the present embodiment, the sounding principle of the present long-distance laser intelligent detonation directional audio warning device is as follows: after the laser beam generated by the laser unit 300 passes through the sounding inner cavity 130, the laser beam is designated to irradiate near the center of the alloy plate 210 for 10 to 20 picoseconds according to a certain algorithm, so as to achieve a single ablation of 1 to 2 nanometers of surface metal and generate a metal mixed plasma cloud; then, the laser beam further irradiates the plasma cloud that has not yet diffused with a suitable power for a period of time, such as 3 femtoseconds, thereby forcing the plasma cloud to gather under light pressure to increase density, and then be heated; then, the laser irradiation is terminated, at which time, the high-temperature and high-pressure plasma cloud will diffuse rapidly, thereby generating a detonation effect on the side of the alloy plate 210 close to the sounding inner cavity 130, thereby driving the alloy plate 210 of the sounding unit 200 to vibrate, so as to conduct energy to the other side of the alloy plate 210, and finally driving the surface air on the outer side of the alloy plate 210 to emit energy to the outside in the form of longitudinal waves. This method of using high-energy laser to generate a high-temperature and high-pressure metal plasma cloud, and then causing the plasma cloud to explode and generate sound waves, can generate a huge sound of more than 220dBd on the surface of the sound-generating unit 200, and after beamforming, it can also generate a sound of more than 190dB at a direct position at a distance of more than 3KM. In this way, the sound waves with very high sound intensity generated in the directional direction and with a long directional propagation distance provided by the long-distance laser intelligent detonation directional audio warning device are used.

[0040] It should be noted that in the above-mentioned sound wave generation process, the laser beam preferably uses a laser with a wavelength of 452.5 nanometers that is easily absorbed by the alloy. Of course, in other embodiments, lasers of other bands can also be used, but lasers with a wavelength of 433.8 nanometers that are not easily absorbed by the alloy are avoided as much as possible. The power of the laser beam used to irradiate the undiffused plasma cloud can be preferably 1×107J / cm². Furthermore, in order to obtain better sound wave directivity, the present long-distance laser intelligent detonation directional audio warning device can preferably use ultrasonic carrier technology on the basis of the original sound unit 200 directly emitting sound. In this way, the good directivity of ultrasonic waves is utilized to further carry the audio band audible to the human ear and the ultrasonic frequency band.

[0041] This long-distance laser intelligent explosion directional audio warning device can reduce power and realize long-distance voice communication in a straight line in bad weather conditions. In addition, by using the vibration effect of sound waves, this long-distance laser intelligent explosion directional audio warning device can also take into account artificial rainfall, hail induction, etc. Figure 1, specifically in this embodiment, the number of the sound generating units 200 is multiple, and the multiple sound generating units 200 are distributed at intervals on the mounting plate 120, and each sound generating unit 200 is detachably and sealingly connected to the mounting plate 120. Here, the sound generating cavity 130 is a horizontally placed bell-shaped cavity structure. When the sound generating unit 200 is laser-burned and worn to a certain extent, the sound generating unit 200 can be removed from the mounting plate 120 for replacement. The sealing connection mode between the sound generating unit 200 and the mounting plate 120 can effectively maintain the near-vacuum environment in the sound generating cavity 130 and reduce the propagation of sound waves on the back of the warning device. In other embodiments, only one sound generating unit 200 may be provided. However, in this embodiment, when the number of the sound generating units 200 is multiple and the multiple sound generating units 200 are distributed at intervals, it is beneficial to generate beamforming and create the maximum sound pressure at a specified point at a specified distance through interference and other effects. Specifically, for example, in this embodiment, the maximum sound intensity generated on the outer surface of a single sound generating unit 200 can reach 220 dB. After multi-unit beamforming, a high sound intensity area of 190 dB can be formed at a distance of 3000 meters. Its loudness far exceeds 100 times the intensity of a concussion grenade at 170 dB and is close to the theoretical limit value of 194.7 dB for the atmospheric energy transfer of sound waves. In other words, in this application, when multiple sound generating units 200 are used simultaneously, one or more laser beams can be irradiated according to an algorithm, occurring at a certain phase difference and frequency, so as to achieve the purpose of obtaining the maximum interference effect at a specified distance and a specified location.

[0042] In addition, in this embodiment, the alloy plate 210 of the sound generating unit 200 is preferably made of zinc-aluminum alloy, and further preferably a zinc-aluminum alloy containing 40% zinc and 60% aluminum. However, this design is not limited thereto. In other embodiments, the alloy plate 210 can also be made of alloys with other formulations. However, in this embodiment, selecting the zinc-aluminum alloy within the foregoing preferred range can not only make the alloy plate 210 stronger and lighter, but also obtain better acoustic performance. For example, the alloy plate 210 of the zinc-aluminum alloy has better audio performance for sound resonance. Of course, other components can be added to the alloy plate 210 to improve its physical and chemical properties, but it should be noted that its oxygen content shall not exceed 2% to avoid performance degradation caused by excessive oxidation.

[0043] Further, please refer to Figure 1 , Figure 2 and Figure 4, in this embodiment, the alloy plate 210 includes a percussion area 211 provided in the middle and an edge area 212 surrounding the periphery of the percussion area 211, and the thickness of the percussion area 211 is greater than that of the edge area 212. The laser beam irradiates on the percussion area 211. Specifically, the alloy plate 210 is circular, the percussion area 211 is a cylinder, and is preferably integrally formed with the edge area 212. Of course, in other embodiments, the alloy plate 210 and the percussion area 211 may also have other shapes, and the percussion area 211 can also be fixed on the alloy plate 210 by means of screw fixation or welding. The thickness of the edge area 212 of the alloy plate 210 can usually be set to 1 cm. After the laser beam irradiates on the percussion area 211, a metal layer of 1-2 nanometers can be peeled off at the position of the laser spot during each detonation effect. In this way, the thickened percussion area 211 will be consumed. When the overall thickness of the percussion area 211 due to burning is the same as the unit thickness, the sound generating unit 200 needs to be replaced.

[0044] Please refer to Figure 1 , Figure 2 , in this embodiment, the percussion area 211 includes a plurality of burning areas 213 for the laser beam to irradiate. One of the burning areas 213 is provided at the center of the percussion area 211, and the other burning areas 213 are evenly spaced along the circumferential direction outside the burning area 213 at the center. Specifically, as Figure 2As shown in the figure, a total of 7 circular ablation zones 213 are provided in the percussion area 211 of a sound generating unit 200. One of the ablation zones 213 is located at the center of the percussion area 211, and the other six ablation zones 213 are arranged around the periphery. During actual use, the laser beam will sequentially irradiate the seven ablation zones 213 according to a preset algorithm. At this time, since the laser pulses are in the picosecond and femtosecond levels, in a very short time, the laser can sequentially irradiate the seven ablation zones 213, and the interval time can be almost ignored. In this way, it is equivalent to increasing the thickness of the ablation zone 213 of the sound generating unit 200 by 7 times, which can effectively extend the service life of the alloy plate 210. In other words, by adopting this fancy non-fixed point irradiation method on the alloy plate 210 in the percussion area 211 with a thickness of 2 cm, the thickness of the working medium can reach a cumulative 7 cm, thereby realizing sensitive and continuous sound emission in the direction. For example, when the sound wave is emitted at a typical frequency of 2000 Hz, this long-distance laser intelligent detonation directional audio warning device can continuously emit normal audio at full power for 9.72 hours; if the ultrasonic carrier wave technology is used for sound emission, such as when using a 60000 Hz carrier wave, this long-distance laser intelligent detonation directional audio warning device can continuously emit carrier audio at full power for 0.32 hours. Therefore, in actual work, this long-distance laser intelligent detonation directional audio warning device can adopt a low-power and point-action working mode, so that the actual working time of the warning device exceeds one week, and the metal plate can be quickly replaced with simple basic tools in a low-dust environment to achieve continuous work. In addition, this long-distance laser intelligent detonation directional audio warning device only needs to continuously work for 3 seconds to shatter the target bulletproof glass 3 kilometers away. If it does not work with only the peak value, the service life of the sound generating unit 200 can be further extended by 3 times. At this time, since the voice transmission efficiency is less than 20%.

[0045] Furthermore, in this embodiment, to obtain better spectral dynamic response, the laser beam is preferably a femtosecond pulsed laser beam, and the spot diameter range of the laser beam is 2 mm to 35 mm. Of course, the spot size can also be changed according to different models and working mode requirements; the alloy plate 210 is circular, the diameter of the alloy plate 210 is greater than or equal to 4 times the spot diameter of the laser beam, and the diameter of the percussion area 211 is preferably three times the spot diameter. In this way, the area of the alloy plate 210 is much larger than the area of the laser spot, which can be used to prevent local over-rapid ablation from causing pitch inaccuracy and prevent functional changes. Specifically, in the laser unit 300, a laser beam with a spot diameter of 5 mm can be generated after reflection and focusing, and the maximum spot power density is greater than 1×10 8 J / cm².

[0046] Please refer to Figure 1 、 Figure 3 and Figure 4, in this embodiment, the mounting plate 120 includes a front plate 121 and a rear plate 122. The rear plate 122 faces the laser unit 300. The outer edges of both the front plate 121 and the rear plate 122 are detachably and sealingly connected to the open outer edge of the bell body 110. A first limiting ring groove 121a having the same shape as the alloy plate 210 is provided on the front plate 121, and a second limiting ring groove 122a having the same shape as the alloy plate 210 is provided on the rear plate 122. A first fixed limiting tooth 1211 is provided on the front plate 121 surface of the alloy plate 210 near the outer edge, and a second fixed limiting tooth 1212 is provided on the rear plate 122 surface of the alloy plate 210 near the outer edge. The sound generating unit 200 further includes a sealing ring 220. The sealing ring 220 is clamped between the first fixed limiting tooth 1211 and the first limiting ring groove 121a, and the sealing ring 220 is also clamped between the second fixed limiting tooth 1212 and the second limiting ring groove 122a. It can be understood that after setting these limiting ring grooves, fixed limiting teeth and the sealing ring 220, the sound generating unit 200 can be hermetically installed on the mounting plate 120, and the sound generating cavity 130 remains in a nearly vacuum state. Of course, the front plate 121 and the rear plate 122 are also sealingly connected to the open edge of the bell body 110, and the front of the alloy plate 210 is sealed with a buffer material. Therefore, at the back of the device, the noise does not exceed 60 dB, and there is no damage to the user's hearing and physiology. Specifically, the first fixed limiting tooth 1211 is used to bite the sealing ring 220 and the front plate 121, and the second fixed limiting tooth 1212 is used to bite the sealing ring 220 and the rear plate 122, so as to realize the positioning and clamping effect of the front plate 121 and the rear plate 122 on the sound generating unit 200. Both fixed limiting teeth can also be used to fix the sealing ring 220 to prevent displacement. The sealing ring 220 has both airtightness and buffering properties, can maintain a nearly vacuum in the sound generating cavity 130, and can effectively damp the energy transmitted from the sound generating unit 200 to the device panel.

[0047] In addition, the front plate 121 is preferably made of a high-damping material, and its outer surface is treated against corrosion to prevent corrosion in the natural environment or the use environment. The front plate 121 is mainly a fixed structure, which can prevent the plate and the sound generating unit 200 from falling off, and can also be provided with structures such as threads, buckles, and quick-release wrenches for convenient and quick disassembly, maintenance, and replacement of the sound generating unit 200. The rear plate 122 is a fixed and strengthened support structure, and is preferably integrally formed with the bell body 110. Both the rear plate 122 and the bell body 110 are preferably made of high-damping and high-strength materials. Of course, reinforcing ribs or other support structures can also be used to enhance their structural strength. The intermediate chamber between the front plate 121 and the rear plate 122 should usually maintain a negative pressure vacuum state. The material strength of both the front plate 121 and the rear plate 122 should be sufficient to support the structural gravity and the uniform pressure difference of 1500 hPa on both sides of the plate.

[0048] Please refer to Figure 4 and Figure 5, in this embodiment, a plurality of first fixed limit teeth 1211 are provided on the front plate 121 surface of the alloy plate 210 near the outer edge, and the plurality of first fixed limit teeth 1211 are arranged in a stepped manner along the thickness direction of the alloy plate 210. A sealing ring 220 is embedded on each first fixed limit tooth 1211; a plurality of second fixed limit teeth 1212 are provided on the rear plate 122 surface of the alloy plate 210 near the outer edge, and the plurality of second fixed limit teeth 1212 are arranged in a stepped manner along the thickness direction of the alloy plate 210. A sealing ring 220 is embedded on each second fixed limit tooth 1212. It can be understood that when such a plurality of fixed limit teeth and the sealing ring 220 are both distributed in a staggered stepped shape, a labyrinth-type anti-leakage circuit can be formed, which can effectively maintain the near-vacuum environment in the cavity; in addition, this setting can also disperse the stress area of the sealing ring 220 and increase the biting area, so that it can prevent poor sealing caused by the falling off of the sealing ring 220 during high-speed vibration.

[0049] Please refer to Figure 1 , specifically in this embodiment, the laser unit 300 includes a laser generator 310, a light guide tube 320, a galvanometer 330 assembly, and a lens module 340; the galvanometer 330 assembly includes a galvanometer 330; a light-transmitting window is provided on the bell body 110. The incident light beam emitted by the laser generator 310 sequentially passes through the light guide tube 320, the galvanometer 330, and the lens module 340 along the optical path to form a laser beam with a preset spot diameter. Then, the laser beam passes through the light-transmitting window and irradiates the sound-generating unit 200. Here, the laser generator 310 preferably adopts a commercial high-energy pulsed laser generator 310, which can generate femtosecond and picosecond laser pulses, and its rated emission power can be selected as 500W, and a single-channel or multi-channel laser input mode can be adopted. The light guide tube 320 can adopt a vacuum tube, and the lens module 340 can be digitally controlled. The laser unit 300 further includes a drive power supply device 350 including a control response algorithm, a silicon galvanometer chip and drive 360, a galvanometer 330 and an attached drive circuit, a cooling module for the lens, and a cooling device attached to the laser generator 310. Here, since a lot of heat is generated when high-energy laser irradiates on the galvanometer 330 and the lens, the cooling module for the lens preferably adopts a high-power forced refrigeration and heat dissipation device such as liquid cooling, and the cooling device attached to the laser generator 310 can preferably adopt an active air-cooling device. Of course, in other embodiments, other cooling schemes are not excluded. Among them, the galvanometer 330 and the lens module 340 can be deflected together under the drive of the corresponding drive device and focus the laser spot to accurately irradiate each designated burning area 213 of the knocking area 211.

[0050] Further, please refer to Figure 1, in this embodiment, the long-distance laser intelligent detonation directional audio warning device further includes an iodine addition device 400 and an air extraction device 500 respectively arranged on both sides of the bell body 110; the iodine addition device 400 includes an iodine addition tube 410 extending into the sound generating cavity 130, and the air extraction device 500 includes an air extraction tube 510 extending into the sound generating cavity 130. Specifically, the iodine addition device 400 includes an iodine vapor generator and an iodine addition tube 410. A through hole for the iodine addition tube 410 to pass through is provided on the bell body 110, and the inner wall of the hole is treated by an iodine corrosion prevention process; the iodine vapor generator 420 generates iodine vapor through vacuum heating and transports the iodine vapor into the sound generating cavity 130 through an air delivery tube. These iodine vapors are mainly used to absorb metal plasma gas, maintain a high light transmittance in the sound generating cavity 130 and prevent the light transmission window from being contaminated by metal deposits, so as to prevent the reduction of the light transmittance; usually, the iodine core dosage is slightly larger than the longest service life of the metal sound generating unit 200, and the iodine vapor generator 420 is modularly designed and can be replaced together when the sound generating unit 200 needs to be replaced. Of course, in an environment where iodine vapor is mixed internally, its detonation effect is to further combine the energy released by chemical energy on the basis of the original change, so as to increase the driving ability of the sound generating unit 200 and enhance the sound generating performance of this long-distance laser intelligent detonation directional audio warning device.

[0051] A plurality of through holes for the air extraction tube 510 to extend into are also provided at the lower part of the bell body 110. The air extraction device 500 can extract or supplement the air between the two layers of the front plate 121 and the rear plate 122 and in the sound generating cavity 130 through the air extraction tube 510. Usually, air extraction is carried out after the mounting plate 120 is installed, and it is communicated with the atmosphere before disassembly. In addition, a filtering device is provided in the external pipeline of the air extraction device 500 for absorbing iodine vapor and iodides.

[0052] Finally, it should be noted that in this embodiment, an anti-corrosion coating is applied to the inner wall of the sound generating cavity 130 and the inner surface of the mounting plate 120 facing the laser unit 300 to prevent iodine vapor corrosion. Outside the bell body 110, means such as a housing can also be used to achieve the functions of aesthetics and preventing environmental and usage damage corrosion. For example, a corrosion-resistant coating such as Teflon can be applied to the inner surface of the rear plate 122 to isolate the corrosion effect of iodine vapor. In addition, in this application, in addition to the foregoing components, it further includes a main control servo unit 600 and data lines and power supply wires for connecting each component. The main control servo unit 600 includes a ranging and positioning algorithm and can realize the intelligent control of each component. In this embodiment, touch screen control is preferably adopted and buttons are provided for backup.

[0053] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A long-distance laser intelligent detonation directional audio warning device, characterized in that, it includes: A housing, the housing includes a bell body and a mounting plate. The bell body has a sounding inner cavity with an open end along the axial direction. The mounting plate seals and covers the open end of the sounding inner cavity. The sounding inner cavity is arranged in a horizontally placed bell shape with an inner diameter gradually expanding along the axial direction towards the open end; A number of sounding units, the sounding unit includes an alloy plate, and the sounding unit is mounted on the mounting plate; and, A laser unit, provided at one end of the bell body opposite to the mounting plate. The laser beam generated by the laser unit irradiates on the sounding unit after passing through the sounding inner cavity to generate a directional sound wave; among them, the laser beam is specified to irradiate near the center of the alloy plate, ablating the surface metal to generate a metal mixed plasma cloud. Then, the laser beam irradiates the non-diffused plasma cloud with a suitable power, forcing the plasma cloud to gather and increase in density under the light pressure. Then, the laser irradiation is terminated, and the high-temperature and high-pressure plasma cloud rapidly diffuses, thereby generating a detonation effect on the side of the alloy plate close to the sounding inner cavity, and then pushing the alloy plate of the sounding unit to vibrate, so as to conduct the energy to the other side of the alloy plate, pushing the air on the outer surface layer of the alloy plate, and emitting the energy in the form of longitudinal waves to the outside; The number of the sounding units is multiple, and the multiple sounding units are distributed at intervals on the mounting plate, and each sounding unit is detachably and hermetically connected to the mounting plate; The alloy plate is made of zinc aluminum alloy.

2. The long-distance laser intelligent detonation directional audio warning device according to claim 1, characterized in that, The alloy plate includes a percussion area provided in the middle and an edge area surrounding the periphery of the percussion area, and the thickness of the percussion area is greater than that of the edge area, and the laser beam irradiates on the percussion area.

3. The long-distance laser intelligent detonation directional audio warning device according to claim 2, characterized in that, The percussion area includes a plurality of ablation areas for the laser beam to irradiate. One of the ablation areas is provided at the center of the percussion area, and the other ablation areas are evenly spaced along the circumferential direction around the ablation area at the center.

4. The long-distance laser intelligent detonation directional audio warning device according to claim 1, characterized in that, The laser beam is a femtosecond pulsed laser beam, the spot diameter range of the laser beam is 2 mm to 35 mm, the alloy plate is circular, and the diameter of the alloy plate is greater than or equal to 4 times the spot diameter of the laser beam.

5. The long-distance laser intelligent detonation directional audio warning device according to claim 1, characterized in that, The mounting plate includes a front plate and a rear plate. The rear plate faces the laser unit. The outer edges of the front plate and the rear plate are detachably and hermetically connected to the outer edge of the open end of the bell body; A first limiting ring groove with the same shape as the alloy plate is provided on the front plate, and a second limiting ring groove with the same shape as the alloy plate is provided on the rear plate; first fixed limiting teeth are provided on the front plate surface of the alloy plate near the outer edge, and second fixed limiting teeth are provided on the rear plate surface of the alloy plate near the outer edge; The sound generating unit further includes a sealing ring, and the sealing ring is clamped between the first fixed limiting teeth and the first limiting ring groove, and the sealing ring is also clamped between the second fixed limiting teeth and the second limiting ring groove.

6. The long-distance laser intelligent detonation directional audio warning device according to claim 5, wherein, a plurality of the first fixed limiting teeth are provided on the front plate surface of the alloy plate near the outer edge, and the plurality of the first fixed limiting teeth are arranged in a stepped manner in the thickness direction of the alloy plate, and each of the first fixed limiting teeth is embedded with a sealing ring; a plurality of the second fixed limiting teeth are provided on the rear plate surface of the alloy plate near the outer edge, and the plurality of the second fixed limiting teeth are arranged in a stepped manner in the thickness direction of the alloy plate, and each of the second fixed limiting teeth is embedded with a sealing ring.

7. The long-distance laser intelligent detonation directional audio warning device according to claim 1, wherein, the laser unit includes a laser generator, a light guide tube, a galvanometer assembly and a lens module; the galvanometer assembly includes a galvanometer; a light transmission window is provided on the bell body, and the incident light beam emitted by the laser generator sequentially passes through the light guide tube, the galvanometer and the lens module along the optical path to form the laser beam with a preset spot diameter.

8. The long-distance laser intelligent detonation directional audio warning device according to any one of claims 1 to 7, wherein, the long-distance laser intelligent detonation directional audio warning device further includes an iodine adding device and an air extraction device respectively arranged on both sides of the bell body; the iodine adding device includes an iodine adding tube extending into the sound generating cavity, and the air extraction device includes an air extraction tube extending into the sound generating cavity.

9. The long-distance laser intelligent detonation directional audio warning device according to claim 8, wherein, an anti-corrosion coating is coated on the inner wall of the sound generating cavity and the inner plate surface of the mounting plate facing the laser unit.

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