CN103236256A - Percussion-style low-frequency underwater acoustic transducer driven by marine current energy - Google Patents
Percussion-style low-frequency underwater acoustic transducer driven by marine current energy Download PDFInfo
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- CN103236256A CN103236256A CN2013100981116A CN201310098111A CN103236256A CN 103236256 A CN103236256 A CN 103236256A CN 2013100981116 A CN2013100981116 A CN 2013100981116A CN 201310098111 A CN201310098111 A CN 201310098111A CN 103236256 A CN103236256 A CN 103236256A
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Abstract
The invention provides a percussion-style low-frequency underwater acoustic transducer driven by marine current energy. The percussion-style low-frequency underwater acoustic transducer comprises a main cylindrical permanent magnet, an auxiliary cylindrical permanent magnet, a cylinder, a percussion member, an acoustic shell, an acoustic tube and the like. The principle of homopolar repulsion and heteropolar attraction between the main cylindrical permanent magnet and the auxiliary cylindrical permanent magnet is adopted; by continually changing magnetic poles of the main cylindrical permanent magnet in the cylinder, the auxiliary cylindrical permanent magnet outside the cylinder is controlled to reciprocate, and a percussion head is driven by the auxiliary cylindrical permanent magnet to periodically percuss the panels of the acoustic tube and the acoustic shell to make sound; and the acoustic signals are high in loudness and wide in frequency band which is in the lower band range. Marine current energy can be directly used for continuously generating acoustic energy required by underwater detection; and the percussion-style low-frequency underwater acoustic transducer is novel in principle, easy to manufacture, compact in structure, reliable in sealing, high in energy utilization rate and long in service life.
Description
Technical field
The invention belongs to utilization of new energy resources and transducer designs field, relate to a kind of energy by ocean current that utilizes under water and come control gear to knock the device that the sounding shell produces the low-frequency sound signal by permanent magnetism power, be specifically related to a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current.
Background technology
People start from the experiment of Switzerland physicist Ke Ladong in 1826 and this figure plan of French mathematician velocity of sound in the measurement water that Geneva Lake launches to the research of modern underwater acoustics.1911, the human bomb is arranged as sound source, carried out the initial experiment of reflection sounding under water, and the echo that is recorded to the seabed of success.We can say that the sound source of bomb blast is that people use underwater sound source the earliest.In recent years, along with the continuous expansion of mankind's activity field to the ocean, people use underwater sound source widely according to different requirements.The deep-sea geology detecting, offshore oil drilling, underwater sound source is all used in fields such as Underwater Target Detection.Moreover; underwater sound source also applies to military hydroacoustic electronic warfare field widely, is used for inveigling, disturbing the detection of enemy's sonar and acoustic homing torpedo, and the hit probability of enemy's torpedo is dropped to about 20% from 80%; thereby protect our naval vessels, improve the viability of naval.
At present, main underwater sound source producing method has following 6 kinds: explosive charge sound source, electroacoustics transducer sound source, parameter array sound source, hydrokinetic type sound source, laser sound source and plasma sound source.Yet main underwater sound source producing method has following deficiency: mechanical drive, and energy loss is big, and the energy by ocean current utilization factor is low; Need extra power to continue under the situation of supply sounding in water for a long time; Audible signal is based on high frequency, and the low-frequency sound signal is little; All do not knock generation by machinery, be difficult to the real sound that imitates the plant equipment of in water, moving; Sound source has the acoustic energy transmission loss in seal chamber.
Summary of the invention
The object of the present invention is to provide a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current.
For achieving the above object, the present invention has adopted following technical scheme:
This underwater acoustic transducer comprises sounding shell, the knocking device of sealing and the energy by ocean current drive unit that cooperates with knocking device by magnetic force.
Described energy by ocean current drive unit comprises transmission shaft, is arranged at the magnet cover in the sounding shell and the impeller that is arranged at sounding shell one side, one end of transmission shaft links to each other with impeller, the other end links to each other with the magnet cover, the magnet cover is provided with some main cylindrical permanent magnet of arranging along the transmission shaft circumference, and the magnetic pole of adjacent main cylindrical permanent magnet is opposite.
Be provided with cylinder in the described sounding shell, the magnet cover is arranged in the cylinder, knocking device comprises and is arranged at the guide rail on the cylinder outer wall circumference and is arranged at linear bearing in the guide rail, linear bearing and guide rail interference fit, be provided with the plexor member that can reciprocatingly slide in the linear bearing, plexor member comprise striking head and link to each other with striking head knock sleeve, knock and be provided with secondary cylindrical permanent magnet in the sleeve, the two ends of secondary cylindrical permanent magnet are respectively arranged with cushion pad.
Be provided with bearing bracket stand in the described cylinder, bearing bracket stand is provided with the deep groove ball bearing for supporting shaft.
Cube shaped or the cuboid of the both-side opening that described sounding shell is four end to end formation of sheet material is welded with front apron on one side opening of sounding shell, is welded with backboard on the opposite side opening.
Described underwater acoustic transducer also comprises the sounding pipe, and the cylinder type hollow pipe of a sounding Guan Weisi different materials, different inner diameters and external diameter, cylinder type hollow pipe are separately fixed on the interior sounding tube fixing device of sounding shell, and the sounding tube fixing device is welded on the front apron.
The preceding 10 rank natural frequencys of described sheet material and sounding pipe are distributed in the different frequency section of low-frequency range.
Described knocking device is 8, and wherein the striking head of 4 knocking devices and four blocks of sheet materials are oppositely arranged respectively, and striking head and four sounding pipes of remaining 4 knocking devices are oppositely arranged respectively, and striking head is knocked four blocks of sheet materials simultaneously or knocked four sounding pipes simultaneously.
Web member and rear connectors before being provided with in the described sounding shell, one side opening of cylinder links to each other with preceding web member, the opposite side opening links to each other with rear connectors, before web member link to each other with locating ring on being arranged at front apron, backboard is provided with back up pad, offer limiting through hole on the back up pad, rear connectors is stuck in the limiting through hole.
Described backboard is provided with bonnet, the junction of bonnet and backboard is provided with O shape rubber seal, driving sleeve is located on the bonnet, and the junction of bonnet and transmission shaft is provided with height lip Y shape rubber seal, and bonnet is provided with the gland that prevents the axially-movable of height lip Y shape rubber seal.
The present invention has following significant advantage: 1) the sounding energy needed directly converts from energy by ocean current, can have great advantage in the off-lying sea marine site utilizes there not being under the situation of extra power supply for a long time sounding under water.2) adopt magnetic drives, saved mechanically operated friction, reduced energy loss.
The percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of the present invention directly utilizes energy by ocean current that power is provided, by the driving device controls plexor member, make the plexor member intermittence knock sounding shell and sounding pipe realization sounding, sounding shell of the present invention adopts all-sealed, and with shell as sounding body, placed the sounding pipe in inside, with respect to independent sounding body is placed ocean current, under the equal conditions, sounding loudness is bigger, and the sounding performance in far field is more excellent; With respect to independent sounding body is placed seal inside, sound attenuating is little.
Permanent magnet of the present invention is cylindrical, the magnetic line of force of main cylindrical permanent magnet crypto set and perpendicular to the upper and lower end face more with respect to watt shape permanent magnet, secondary cylindrical permanent magnet is subjected to littler side force, further reduce the friction force of plexor member wall, improved capacity usage ratio.
The present invention utilizes plexor member to-and-fro movement intermittence in linear bearing to knock the sounding pipe and sounding shell wall carries out sounding, the penetrable cylinder wall of magnetic force is directly controlled the motion of cylindrical outer plexor member, do not need in wall perforate transmission, motive seal and energy loss thereof have been removed from, and linear bearing is set in guide rail, wall friction between plexor member and the guide rail is changed into the rolling friction of plexor member and linear bearing, reduce the frictional dissipation between plexor member and the guide rail to greatest extent, motion realizes simple, sound stable is good, it is convenient to install, and the reliability height can well be simulated the sound that ship etc. moves in water; Sounding shell wall adopts the sheet material of different-thickness and different materials to form, the sounding pipe also adopts the cylinder type hollow pipe of different materials, different inner diameters and external diameter to constitute, therefore different sounding performances and sounding frequency band are just arranged, and the preceding 10 rank natural frequencys that make each sheet material and each sounding pipe are distributed in the different frequency section of low-frequency range (in the 2000Hz), simultaneously sounding time-frequency bandwidth, frequency is low, sound intensity is big.
Description of drawings
Fig. 1 is front view of the present invention (analysing and observe);
Fig. 2 is one of fundamental diagram of the present invention;
Fig. 3 is two of fundamental diagram of the present invention;
Fig. 4 is the sounding body model; Among Fig. 4, a is Open architecture, and b is enclosed construction;
Fig. 5 is the sound field pressure-plotting; Among Fig. 5, a is Open architecture, and b is enclosed construction;
Fig. 6 is the acoustic pressure comparison diagram of Open architecture and sealed construction;
Among the figure: 1 front apron; The 1a locating ring; 2 sounding shells; Web member before 3; 4 cylinders; 5 guide rails; 6 linear bearings; 7 knock sleeve; 8 striking head; 9 secondary cylindrical permanent magnet; 10 cushion pads; 11 rear connectors; 12 backboards; 12a O-ring seal mounting groove; 13 bonnets; 14 impellers; 15 glands; 16 height lip Y shape rubber seal; 17O shape rubber seal; 18 back up pads; The 18a limiting through hole; 19 transmission shafts; 20 clamp nuts; 21 magnet covers; 22 main cylindrical permanent magnet; 23 rubber blankets; 24 bearing bracket stands;
25 deep groove ball bearings; 26 sounding pipes; 27 sounding tube fixing devices; S is the percussion power acting surface.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Referring to Fig. 1-Fig. 3, underwater acoustic transducer of the present invention comprises sounding shell 2, the knocking device of sealing and the energy by ocean current drive unit that cooperates with knocking device by magnetic force.Described energy by ocean current drive unit comprises transmission shaft 19, is arranged at the magnet cover 21 in the sounding shell 2 and the impeller 14 that is arranged at sounding shell 2 one sides, one end of transmission shaft 19 links to each other with impeller 14, the other end and magnet cover 21 links to each other by screw thread, clamp nut 20 further locked magnet covers 21, magnet cover 21 is provided with some main cylindrical permanent magnet 22 of arranging along transmission shaft 19 circumference, and the magnetic pole of adjacent main cylindrical permanent magnet is opposite.Be provided with cylinder 4 in the described sounding shell 2, magnet cover 21 and main cylindrical permanent magnet 22 are arranged in the cylinder 4, knocking device comprises and is arranged at the guide rail 5 on the cylinder 4 outer wall circumference and is arranged at linear bearing 6 in the guide rail, linear bearing 6 and guide rail 5 interference fit, be provided with the plexor member that can reciprocatingly slide in the linear bearing 6, plexor member comprise striking head 8 and link to each other with striking head 8 knock sleeve 7, knock and be provided with secondary cylindrical permanent magnet 9 in the sleeve 7, the two ends of secondary cylindrical permanent magnet are respectively arranged with cushion pad 10.Be provided with two bearing bracket stands 24 in the described cylinder 4, bearing bracket stand 24 is provided with the deep groove ball bearing 25 for supporting shaft 19.
Cube shaped or the cuboid of the both-side opening of the end to end formation of sheet material that described sounding shell 2 is four different-thickness different materials is welded with front apron 1 on one side opening of sounding shell 2, is welded with backboard 12 on the opposite side opening.Described underwater acoustic transducer also comprises sounding pipe 26, the cylinder type hollow pipe of a sounding Guan Weisi different materials, different inner diameters and external diameter, the cylinder type hollow pipe is separately fixed on the interior sounding tube fixing device 27 of sounding shell, and sounding tube fixing device 27 is welded on the front apron 1.The preceding 10 rank natural frequencys of described every block of sheet material and each sounding pipe are distributed in the different frequency section of low-frequency range.Web member 3 and rear connectors 11 before being provided with in the described sounding shell 2, one side opening of cylinder 4 and preceding web member 3 link to each other by bolt, opposite side opening and rear connectors 11 link to each other by bolt, before web member 3 link to each other with locating ring 1a on being arranged at front apron 1, backboard 12 is provided with back up pad 18, back up pad 18 and backboard 12 link to each other by bolt, offer limiting through hole 18a on the back up pad 18, and rear connectors 11 is stuck in the limiting through hole 18a.
Described backboard 12 is provided with bonnet 13, backboard 12 is connected with the form of bonnet 13 with flange, bonnet 13 is provided with O shape rubber seal 17 with the junction of backboard 12, transmission shaft 19 is sheathed on the bonnet 13, bonnet 13 is provided with height lip Y shape rubber seal 16 with the junction of transmission shaft 19, and bonnet 13 is provided with the gland 15 that prevents 16 axially-movables of height lip Y shape rubber seal.
Described knocking device is 8, and wherein the striking head of 4 knocking devices and four blocks of sheet materials are oppositely arranged respectively, and striking head and four sounding pipes of remaining 4 knocking devices are oppositely arranged respectively, and striking head is knocked four blocks of sheet materials simultaneously or knocked four sounding pipes simultaneously.
Principle of work of the present invention is as follows:
The rotating mechanical energy that this underwater acoustic transducer directly utilizes device such as impeller to obtain current drives the transmission shaft rotation, by the magnetic pole acting force transmission of permanent magnet, makes the plexor member intermittence knock sounding pipe or sounding shell wall and then sounding; The transmission of magnetic pole acting force refers to that this underwater acoustic transducer utilizes the principle that homopolar-repulsion, heteropole are inhaled mutually between secondary cylindrical permanent magnet and the main cylindrical permanent magnet, magnetic pole by main cylindrical permanent magnet in the continuous change cylinder, control the outer secondary cylindrical permanent magnet of cylinder and move reciprocatingly, secondary cylindrical permanent magnet drives striking head and constantly knocks sounding pipe or sounding shell wall and then sounding.
Secondary cylindrical permanent magnet with the mechanism of main cylindrical permanent magnet is: the close cylinder side of the secondary cylindrical permanent magnet of plexor member that is used for knocking sheet material is the S utmost point, Dui Ying main cylindrical permanent magnet magnetic pole is the N utmost point with it, plexor member is in the guide rail bottom under attraction force acts, meanwhile, the secondary cylindrical permanent magnet of plexor member that is used for knocking the sounding pipe is the S utmost point near the cylinder side, Dui Ying main cylindrical permanent magnet magnetic pole is the S utmost point with it, and plexor member is pushed and knocks the sounding pipe and carry out sounding under the repulsive force effect.Rotation along with the magnet cover, magnetic pole for the corresponding main cylindrical permanent magnet of plexor member of knocking sheet material becomes the S utmost point by the N utmost point, plexor member is pushed and knocks the sounding shell and carry out sounding under the effect of repulsive force, meanwhile, magnetic pole for the corresponding main cylindrical permanent magnet of plexor member of knocking the sounding pipe becomes the N utmost point by the S utmost point, and plexor member is in the guide rail bottom under attraction force acts.Along with the rotation of magnet cover, repeat said process again, so circulation, plexor member to-and-fro movement intermittence knocks the sounding pipe and the sounding shell carries out sounding; This underwater acoustic transducer energy loss is little, and it is little to rub, energy by ocean current utilization factor height, and the principle novelty, easy to manufacture, compact conformation, sealing is reliable, and rigidity is big, the intensity height, bearing capacity is strong, and the life-span is long.
Embodiment
With reference to shown in Figure 1, a kind of percussive low frequency underwater acoustic transducer based on the permanent magnet transmission comprises drive unit, stationary installation, sound-producing device, knocking device and packoff.Drive unit mainly is made up of transmission shaft 19, magnet cover 21, main cylindrical permanent magnet 22, clamp nut 20 and impeller 14 etc.Circumferentially 8 main cylindrical permanent magnet of uniform array are fixed on magnet cover surface by epoxide-resin glue, magnetic pole is opposite between two any adjacent main cylindrical permanent magnet, transmission shaft circles like this, main cylindrical permanent magnet magnetic pole can conversion 8 times, magnet overlaps with transmission shaft by being threaded, and locked with clamp nut, transmission shaft is connected by bolt with impeller.Stationary installation is made up of cylinder 4, preceding web member 3, rear connectors 11, front apron 1, backboard 12, bearing bracket stand 24, deep groove ball bearing 25, back up pad and sounding shell 2 etc.Transmission shaft is connected with bearing bracket stand by deep groove ball bearing, bearing bracket stand is connected with cylinder by bolt, preceding web member 3 and rear connectors 11 are connected the cylinder two ends by bolt, before web member be connected with locating ring 1a on the front apron, rear connectors is connected with limiting through hole 18a on the back up pad 18, locating ring 1a and limiting through hole 18a acting in conjunction have limited combiner (preceding web member 3, cylinder 4, moving axially rear connectors 11), rear connectors is connected with back up pad by bolt, limited combiner (preceding web member 3, cylinder 4, rear connectors 11) radially rotation, back up pad is connected with backboard 12 by bolt again, and front apron is connected with the sounding shell by welding with backboard.Knocking device mainly by guide rail 5, linear bearing 6, knock sleeve 7, striking head 8, secondary cylindrical permanent magnet 9, cushion pad 10 and rubber blanket 23 etc. and form.Guide rail is connected with cylinder outer wall by welding, linear bearing 6 and guide rail interference fit, striking head by screw thread with knock sleeve and be connected and be positioned in the linear bearing, striking head with knock the secondary cylindrical permanent magnet of packing in the space that sleeve forms, put into cushion pad up and down in secondary cylindrical permanent magnet and form plexor member, place rubber blanket in the guide rail bottom.Cushion pad and rubber blanket all are for damping, buffering, because permanent magnet material is more crisp, frangible.Sound-producing device is made up of sounding shell 2 and sounding pipe 26,4 blocks of sheet materials of sounding shell have different materials and thickness, 4 cylinder type hollow pipes that the sounding pipe is unlike material, different inner diameters and external diameter, the preceding 10 rank natural frequencys of 4 blocks of sheet materials and 4 sounding pipes are distributed in the different frequency section of low-frequency range.Drive unit moves reciprocatingly plexor member, thereby the plexor member intermittence is knocked sounding pipe 26 and sounding shell 2 is realized sounding, and 4 sounding pipes and 4 blocks of sheet materials replace sounding, and sound intensity is bigger, and frequency band is wideer.Packoff mainly is made up of bonnet 13, O shape rubber seal 17, height lip Y shape rubber seal 16 and gland 15 etc.Seal by O shape rubber seal 17 between bonnet 13 and the backboard 12, design O-ring seal mounting groove 12a on the backboard, the position of O-ring seal mounting groove, width, the degree of depth match with O shape rubber seal 17.Rotatablely move between transmission shaft and the bonnet, adopt height lip Y shape rubber seal 16 and gland 15 to carry out motive seal, axial restraint is carried out by gland in the right side of height lip Y shape rubber seal, the diameter of the transmission shaft through hole that arranges on the gland is than the big 1～3mm of diameter of transmission shaft, guarantee that frictional interference does not take place for transmission shaft and transmission shaft through hole, gland is connected with bonnet by screw thread.
With reference to Fig. 2 and shown in Figure 3, the sounding principle of above-mentioned percussive low frequency underwater acoustic transducer based on the permanent magnet transmission is to utilize homopolar-repulsion between secondary cylindrical permanent magnet and the main cylindrical permanent magnet, heteropole is inhaled mutually, the rotation of ocean current impeller, impeller drives transmission shaft and the magnet cover rotates, the main cylindrical permanent magnet corresponding with secondary cylindrical permanent magnet constantly changing magnetic pole, secondary cylindrical permanent magnet is subjected to periodicity attractive force and the repulsive force of main cylindrical permanent magnet, secondary cylindrical permanent magnet just can to-and-fro movement, knocks sounding pipe and sounding shell and then sounding thereby promote striking head.Fig. 2 and Fig. 3 are the whole sounding principle process of knocking.Among Fig. 2, the secondary cylindrical permanent magnet of plexor member that is used for knocking sheet material is the S utmost point near the cylinder side, Dui Ying main cylindrical permanent magnet magnetic pole is the N utmost point with it, different magnetic poles produces attractive force, striking head, knock the plexor member that sleeve and secondary cylindrical permanent magnet form and be in the guide rail bottom, meanwhile, the secondary cylindrical permanent magnet of plexor member that is used for knocking the sounding pipe is the S utmost point near the cylinder side, Dui Ying main cylindrical permanent magnet magnetic pole is the S utmost point with it, and plexor member is pushed and knocks the sounding pipe and carry out sounding under the repulsive force effect.Among Fig. 3, when transmission shaft rotates 1/8 circle, magnetic pole for the corresponding main cylindrical permanent magnet of plexor member of knocking sheet material becomes the S utmost point by the N utmost point, identical magnetic pole produces repulsive force, plexor member is pushed under the effect of repulsive force, knocks the sounding shell and carries out sounding, meanwhile, magnetic pole for the corresponding main cylindrical permanent magnet of plexor member of knocking the sounding pipe becomes the N utmost point by the S utmost point, and plexor member is in the guide rail bottom under attraction force acts.So circulation, plexor member to-and-fro movement intermittence knocks the sounding pipe and the sounding shell carries out sounding.4 sounding pipes are sounding simultaneously, and four blocks of sheet material is sounding simultaneously also, and sounding pipe and sheet material replace sounding.Owing in the guide rail linear bearing is arranged, reduced when plexor member moves reciprocatingly greatly and the friction force between the guide rail, and rotation and the cylinder of magnet cover are noncontacts, zerofriction force, between transmission shaft and the bearing bracket stand by the deep groove ball bearing effect, friction force is also very little, so whole device has only very little frictional dissipation in operation process, the energy by ocean current utilization factor is very high.
In order to explain sealed construction with respect to the advantage of Open architecture, simulation software has carried out analogue simulation with sysnoise acoustics.Open sounding body directly places ocean current, surrounded by ocean current around the sounding body, and be that 0.2m, thickness are that the corrosion resistant plate of 2mm is simulated open sounding body with the length of side, shown in Fig. 4 (a); Enclosure-type sounding body periphery is surrounded by seawater, and inside is air, is that 0.2m, thickness are that the stainless steel box of the corrosion resistant plate splicing of 2mm is simulated the enclosure-type sounding body with 6 length of sides, shown in Fig. 4 (b).
After setting up structural model, apply the percussion power of 100N, 10Hz at the percussion power acting surface center of Open architecture (corrosion resistant plate) center and sealed construction (stainless steel box), guarantee the boundary condition unanimity.In the sysnoise simulation process, for the emulation of Open architecture, adopt indirect boundary element model, the material properties of definition fluid is water, the definition jerk value is zero acoustic pressure boundary condition; For the emulation of sealed construction, adopt the inside and outside coupling model of DIRECT BOUNDARY ELEMENT, the material properties of definition internal flow is air, the material properties of external fluid is water, sets up the connection coupled relation of Fluid-Fluid.Define the court point after calculating is finished again, the sound field pressure distribution of open sounding body and enclosure-type sounding body as shown in Figure 5.
Through calculating, can obtain distance and knock the sound pressure level at face different distance place, it is more near that distance is knocked face, and the sound field sound pressure level is more big, and it is more far away that distance is knocked face, and the sound field sound pressure level is more little.The peaked variation of sound field pressure when distance is knocked face 0.1m-1m is referring to Fig. 6.Simultaneously, can find: under the effect of same percussion power, the acoustic pressure of sealed construction is greater than the acoustic pressure of Open architecture, and more far away apart from knocking face, and the gap between the two is more big.So under equal conditions, with respect to open vocal structure, the sounding loudness of sealed construction is bigger, and the sounding performance in far field is more excellent.
Claims (10)
1. percussive low frequency underwater acoustic transducer that drives based on energy by ocean current, it is characterized in that: this underwater acoustic transducer comprises sounding shell (2), the knocking device of sealing and the energy by ocean current drive unit that cooperates with knocking device by magnetic force.
2. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 1, it is characterized in that: described energy by ocean current drive unit comprises transmission shaft (19), is arranged at the magnet cover (21) in the sounding shell (2) and the impeller (14) that is arranged at sounding shell (2) one sides, one end of transmission shaft (19) links to each other with impeller (14), the other end links to each other with magnet cover (21), magnet cover (21) is provided with some main cylindrical permanent magnet (22) of arranging along transmission shaft (19) circumference, and the magnetic pole of adjacent main cylindrical permanent magnet is opposite.
3. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 2, it is characterized in that: be provided with cylinder (4) in the described sounding shell (2), magnet cover (21) is arranged in the cylinder (4), knocking device comprises and is arranged at the guide rail (5) on cylinder (4) the outer wall circumference and is arranged at linear bearing (6) in the guide rail, linear bearing (6) and guide rail (5) interference fit, linear bearing is provided with the plexor member that can reciprocatingly slide in (6), plexor member comprise striking head (8) and link to each other with striking head (8) knock sleeve (7), knock in the sleeve (7) and be provided with secondary cylindrical permanent magnet, the two ends of secondary cylindrical permanent magnet are respectively arranged with cushion pad (10).
4. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 3, it is characterized in that: be provided with bearing bracket stand (24) in the described cylinder (4), bearing bracket stand (24) is provided with the deep groove ball bearing (25) for supporting shaft (19).
5. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 3, it is characterized in that: described sounding shell (2) is the cube shaped or cuboid of the both-side opening of four end to end formation of sheet material, be welded with front apron (1) on one side opening of sounding shell (2), be welded with backboard (12) on the opposite side opening.
6. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 5, it is characterized in that: described underwater acoustic transducer also comprises sounding pipe (26), the cylinder type hollow pipe of a sounding Guan Weisi different materials, different inner diameters and external diameter, the cylinder type hollow pipe is separately fixed on the interior sounding tube fixing device (27) of sounding shell, and sounding tube fixing device (27) is welded on the front apron (1).
7. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 6, it is characterized in that: the preceding 10 rank natural frequencys of described sheet material and sounding pipe (26) are distributed in the different frequency section of low-frequency range.
8. according to the described a kind of percussive low frequency underwater acoustic transducer based on the permanent magnet transmission of claim 6, it is characterized in that: described knocking device is 8, wherein the striking head of 4 knocking devices and four blocks of sheet materials are oppositely arranged respectively, striking head and four sounding pipes of remaining 4 knocking devices are oppositely arranged respectively, and striking head is knocked four blocks of sheet materials simultaneously or knocked four sounding pipes simultaneously.
9. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 5, it is characterized in that: be provided with preceding web member (3) and rear connectors (11) in the described sounding shell (2), one side opening of cylinder (4) links to each other with preceding web member (3), the opposite side opening links to each other with rear connectors (11), before web member (3) link to each other with locating ring (1a) on being arranged at front apron (1), backboard (12) is provided with back up pad (18), offer limiting through hole (18a) on the back up pad (18), rear connectors (11) is stuck in the limiting through hole (18a).
10. according to the described a kind of percussive low frequency underwater acoustic transducer that drives based on energy by ocean current of claim 9, it is characterized in that: described backboard (12) is provided with bonnet (13), bonnet (13) is provided with O shape rubber seal (17) with the junction of backboard (12), transmission shaft (19) is sheathed on the bonnet (13), bonnet (13) is provided with height lip Y shape rubber seal (16) with the junction of transmission shaft (19), and bonnet (13) is provided with the gland (15) that prevents the axially-movable of height lip Y shape rubber seal (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310098111.6A CN103236256B (en) | 2013-03-25 | 2013-03-25 | A kind of percussive low-frequency underwater acoustic transducer driven based on energy by ocean current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310098111.6A CN103236256B (en) | 2013-03-25 | 2013-03-25 | A kind of percussive low-frequency underwater acoustic transducer driven based on energy by ocean current |
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| Publication Number | Publication Date |
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| CN103236256A true CN103236256A (en) | 2013-08-07 |
| CN103236256B CN103236256B (en) | 2015-10-28 |
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| CN103680487A (en) * | 2013-12-18 | 2014-03-26 | 西安交通大学 | Axial knocking type underwater acoustic transducer driven by ocean current energy |
| CN107731218A (en) * | 2017-09-28 | 2018-02-23 | 哈尔滨工程大学 | A kind of reciprocating underwater very low frequency sound source |
| CN113180664A (en) * | 2021-04-14 | 2021-07-30 | 脑谷人工智能研究院(南京)有限公司 | Child psychological test assessment method and display mechanism thereof |
| CN113450749A (en) * | 2020-03-24 | 2021-09-28 | 中国人民解放军国防科技大学 | Fluid sound source system capable of achieving low-frequency push-pull modulation without negative pressure source |
| CN116618279A (en) * | 2023-07-25 | 2023-08-22 | 深圳市城市公共安全技术研究院有限公司 | Underwater simulated knocking device and application method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680487A (en) * | 2013-12-18 | 2014-03-26 | 西安交通大学 | Axial knocking type underwater acoustic transducer driven by ocean current energy |
| CN103680487B (en) * | 2013-12-18 | 2017-01-04 | 中国船舶工业系统工程研究院 | A kind of axial percussive underwater acoustic transducer driven based on energy by ocean current |
| CN107731218A (en) * | 2017-09-28 | 2018-02-23 | 哈尔滨工程大学 | A kind of reciprocating underwater very low frequency sound source |
| CN113450749A (en) * | 2020-03-24 | 2021-09-28 | 中国人民解放军国防科技大学 | Fluid sound source system capable of achieving low-frequency push-pull modulation without negative pressure source |
| CN113450749B (en) * | 2020-03-24 | 2024-04-23 | 中国人民解放军国防科技大学 | Negative pressure source-free low-frequency push-pull modulation fluid sound source system |
| CN113180664A (en) * | 2021-04-14 | 2021-07-30 | 脑谷人工智能研究院(南京)有限公司 | Child psychological test assessment method and display mechanism thereof |
| CN113180664B (en) * | 2021-04-14 | 2024-01-02 | 山东中科慧心智能科技有限公司 | Psychological test evaluation method for children and display mechanism thereof |
| CN116618279A (en) * | 2023-07-25 | 2023-08-22 | 深圳市城市公共安全技术研究院有限公司 | Underwater simulated knocking device and application method thereof |
| CN116618279B (en) * | 2023-07-25 | 2024-02-20 | 深圳市城市公共安全技术研究院有限公司 | Underwater simulated knocking device and application method thereof |
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