CN104038862A - Electric acoustic transmitting transducer - Google Patents
Electric acoustic transmitting transducer Download PDFInfo
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- CN104038862A CN104038862A CN201310071343.2A CN201310071343A CN104038862A CN 104038862 A CN104038862 A CN 104038862A CN 201310071343 A CN201310071343 A CN 201310071343A CN 104038862 A CN104038862 A CN 104038862A
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Abstract
The invention provides an electric acoustic transmitting transducer which has the advantages of small size and high working depth and can achieve underwater very-low-frequency, broadband and high-power sound radiation. The transducer comprises a pressure-resistant shell composed of a wall surface and a bottom surface, and a piston radiation surface near an upper port of the transducer. The piston radiation surface is supported by an air spring installed inside the pressure-resistant shell, and is connected with the wall surface of the pressure-resistant shell through a leaf spring. The air spring is internally equipped with an electromagnetic actuator used for exciting longitudinal vibration of the piston radiation surface to radiate sound waves. The upper part of the electromagnetic actuator is equipped with an eddy current displacement sensor used for monitoring the longitudinal position of the piston radiation surface so as to work with an external air pressure control system to adjust the internal pressure of the air spring to achieve hydrostatic equilibrium of air pressure and water pressure. The hollow part of the bottom surface of the pressure-resistant shell is equipped with an electrical interface board which includes an air valve connected with the external air pressure control system, and electrical interfaces of the electromagnetic actuator and the displacement sensor.
Description
Technical field
The invention belongs to underwater acoustic transducer technical field, be specifically related to a kind of electric water acoustic emission transducer.
Background technology
Sound wave is the information carrier of unique known long-distance communications under water, and acoustic method is the Main Means of the numerous areas such as undersea detection, measurement, target identification and location, Marine Geology exploration, and its application is day by day deep.Development along with modern underwater acoustic technology, in some fields, the low side operating frequency of sound wave has extended to the very low frequency section of tens hertz, therefore the essential tool of being implemented as underwater acoustic technology, the significant and value of the development of very low frequency broadband underwater acoustic transducer, especially transmitting transducer.
In realizing the method for very low frequency broadband acoustic radiation under water, common are overflow-type annulus transducer, multimode flextensional transducer, dynamic transducer etc.Wherein overflow-type annulus transducer, multimode flextensional transducer design transducer based on different structure, adjust and utilize the resonance of structure different modalities, thereby reach the acoustic radiation of very low frequency broadband.The transducer radiating surface both sides of above-mentioned two types are water, although this feature makes transducer have advantages of that resistance to static pressure ability is strong, working depth is high, its all-bottom sound radiation efficiency is lower.For reaching higher very low frequency acoustic radiation ability, the general volume of the type transducer is large, quality is high, loss power is large, therefore its practical application is subject to certain limitation.
Dynamic transducer is mainly comprised of the stiff piston of magnetic circuit and connecting coil.When passing to electric current, thereby the coil in magnetic field excites piston vibration radiative acoustic wave by the effect that is subject to power, so this type transducer is called again moving-coil type transducer.Because piston area inner side is air, the acoustic radiation efficiency of dynamic transducer is higher, therefore its volume, quality and loss power are relatively little under identical acoustic radiation ability.But for assurance transducer, under different depth, all can normally work, must piston cavity air pressure be regulated, with balance hydrostatic pressing.Current dynamic transducer is generally taked pressure self-balancing structure, by flexible air-bag, store a certain amount of air, utilize the compression of different depth lower gasbag volume to guarantee the consistent of its air pressure inside and external water pressure, thereby realize the self-balancing of air pressure under different depth, hydraulic pressure, the UW600 type moving-coil type ultralow frequency transducer of Britain Data Physics company for example, and patent publication No. a kind of broadband sound source of very low frequency under water that is CN102075828A, the type transducer general structure is as shown in Figure 1.Because air compressibility is stronger, not only volume is larger for the dynamic transducer of employing prior art, and its working depth is also subject to certain limitation.
Summary of the invention
The object of the invention is to, for overcoming the deficiency of current dynamic transducer, the very low frequency broadband emission transducer of a kind of small size, the high workload degree of depth is provided, can realizes high-power acoustic radiation under water, the invention provides a kind of Novel electric underwater sound transmitting transducer.
Electric water acoustic emission transducer provided by the invention, it is characterized in that, comprise: the pressure casing being formed by wall 7 and bottom surface 8, the air spring 2 of longitudinal extension is set in the inside of pressure casing, and this air spring 2 is for supporting the radiating of circular piston face 6 that is positioned near horizontal positioned wall 7 upper port;
Described air spring 2 inside lay one for encouraging the electromagnetic actuator 1 of described radiating of circular piston face 6 extensional vibrations and then radiative acoustic wave, described electromagnetic actuator 1 is fixed on the electric interfaces plate 11 that is positioned at pressure casing bottom surface, the power output of described electromagnetic actuator 1 is connected with radiating of circular piston face 6, and the upper surface of this electromagnetic actuator 1 is placed for monitoring the eddy current displacement sensor 4 of radiating of circular piston face 6 lengthwise positions;
Described electric interfaces plate 11 is fixed on the hollow space of pressure casing bottom surface 8, and on this electric interfaces plate 8, arrange one for regulating air valve 9 and an electrical interface 10 of air spring 2 air pressure inside, and this electrical interface 10 further comprises the signal output interface of electromagnetic actuator 1 input interface and eddy current displacement sensor 4.
Above-mentioned electromagnetic actuator 1 is connected with described radiating of circular piston face 6 with screw by screw rod, and described screw rod two ends connect respectively the output of electromagnetic actuator 1 and the central through hole of radiating of circular piston face 6.
Above-mentioned transducer also comprises a leaf spring, and this leaf spring is positioned at the upper port place of pressure casing wall 7 and connects center and the pressure casing wall 7 of radiating of circular piston face 6, for limiting the lateral displacement of the radiating of circular piston face of this leaf spring below.
Above-mentioned radiating of circular piston face 6 is connected with leaf spring by a connection piece, and this connector is used O type circle to be fixed on the center of radiating of circular piston face 6, realizes watertight.
Above-mentioned transducer also comprises and is arranged near the some laterally zygomorphic stopping means 3 radiating of circular piston face correspondence position inside pressure casing, and this stopping means 3 be that semicircle sheet is protruding;
Described radiating of circular piston face 6 is provided with semi-circular groove 15 some and that semi-cylindrical hill stopping means 3 is measure-alike corresponding to stopping means 3.
Above-mentioned radiating of circular piston face 6 is made of aluminum, is carved with a plurality of scalloped recess 16 on it, to alleviate its quality.
Above-mentioned radiating of circular piston face 6 and 1～2 millimeter, wall 7 interval.
Under the different operating degree of depth, need to regulate by external pressure control system the air pressure inside of air spring 2, realize the static balance of hydraulic pressure, air pressure, make radiating of circular piston face 6 in equilbrium position (centers of upper and lower two groups of stopping means), thereby guarantee the normal work of transducer;
Wherein, described external pressure control system structure is:
Described external pressure control system comprises source of the gas 17, three-way air valve 18 and two breather valves 19, wherein the first gas port of three-way air valve 18 is connected two breather valves 19 and source of the gas 17 by tracheae 20 respectively with the 3rd gas port, its second gas port directly leads to atmosphere, and two breather valve 19 another gas ports connect transducer air valve 9 by tracheae 20.
Can operate as follows said external pneumatic control system, realize the adjusting to transducer air pressure inside:
First, open two breather valves 19;
Secondly, according to the current location of eddy current displacement sensor 4 output signal judgement radiating of circular piston faces 6, if higher than equilbrium position, the position that radiating of circular piston face 6 was exitted, reduced to the first gas port of UNICOM's three-way air valve 18 and the second gas port, otherwise the position that radiating of circular piston face 6 was inflated, improved to the first gas port of UNICOM's three-way air valve 18 and the 3rd gas port;
When radiating of circular piston face 6 is adjusted to equilbrium position, close two breather valves 19, complete air pressure adjustment process.
Optionally, above-mentioned air pressure adjustment process can be used PID controller and three-way servo air valve automatically to realize, wherein PID controller is input as the output signal of displacement transducer, and its output is controlled three-way servo air valve, thereby automatically realizes the operation of above-mentioned venting and inflation.
The technical solution adopted in the present invention is: transducer is comprised of pressure casing, leaf spring, radiating of circular piston face, air spring, electromagnetic actuator, eddy current displacement sensor, electric interfaces plate and some connectors; Radiating of circular piston face is installed on the upper surface of transducer, and its longitudinal piston vibration is to radiative acoustic wave outside transducer; Radiating of circular piston face inner side is supported by air spring, utilizes air spring to connect radiating of circular piston face and transducer lower surface, and air spring inside is filled with air; Radiating of circular piston face diameter is slightly less than pressure casing internal diameter, between the two, leave certain gap, use the metal leaf spring with high transverse stiffness, low longitudinal rigidity to connect radiating of circular piston face and pressure casing simultaneously, when guaranteeing radiating surface extensional vibration flexibility, avoid it to occur larger lateral displacement and then produce frictional influence transducer sound Radiation; Radiating of circular piston face is connected with metal leaf spring by the connector at its center, uses O type circle to seal between this connector and radiating surface, guarantees watertightness; For improving transducer acoustic radiation ability, radiating of circular piston face is made by the less aluminium of density, and its upper surface is carved with a plurality of scalloped recess, when guaranteeing its integral rigidity, reduces quality; Electromagnetic actuator is equipped with in air spring inside, and for exciting the extensional vibration of radiating of circular piston face, this electromagnetic actuator is connected and fixed by screw rod and radiating surface center; At the inner eddy current displacement sensor that uses of air spring, the length travel of radiating of circular piston face is monitored, this transducer by floor installation in electromagnetic actuator top; Upper and lower two groups of stopping means are housed in the inside circumference of pressure casing upper surface, every group of stopping means consists of even several semicircle lamellar projections that are distributed on circumference, its object is length travel, the protection electromagnetic actuator of limited piston radiating surface, correspondence position at radiating of circular piston face circumference is carved with semi-circular groove simultaneously, so that install; Electric interfaces plate is equipped with in the lower surface of transducer, and electromagnetic actuator input interface, displacement transducer output interface and air valve are housed on plate, and this electric interfaces plate is used O type circle to be connected with pressure casing bottom.
During practical application of the present invention, need use watertight cable to connect electromagnetic actuator input interface and displacement transducer interface, need to use tracheae to connect air valve simultaneously.When transducer is immersed in the water behind predetermined work position, first should regulate air spring air pressure inside according to displacement transducer output, make radiating of circular piston face be positioned at equilbrium position, i.e. center between upper and lower stopping means, thus reach the static balance of hydraulic pressure, air pressure.This process can realize by manual adjustment, also can use controller to coordinate servo air valve automatically to realize.After said process completes, can drive electromagnetic actuator by power amplifier, excite longitudinal piston vibration of radiating of circular piston face, and then to radiative acoustic wave in water.
Compare with immediate prior art, main advantage of the present invention is:
(1) technical scheme of the present invention is owing to having abandoned the pressure self-balancing structure of existing very low frequency broadband underwater acoustic transducer generation with displacement transducer and air valve, by regulating the mode of controlling to realize static balance on the bank, therefore compare with general dynamic transducer, the present invention has less volume, and can reach higher working depth.
(2) from there is pressure self-balancing structure, generally need the dynamic transducer of horizontal positioned different, the present invention is owing to directly chamber internal gas pressure being regulated, thus while using its radiating of circular piston face towards unrestricted.
Accompanying drawing explanation
Fig. 1 is the structure of the pressure self-balancing dynamic transducer of prior art underwater acoustic transducer employing;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is radiating of circular piston face upper side surface structure figure of the present invention;
Fig. 4 is external pressure control system schematic diagram of the present invention.
Accompanying drawing sign:
1, electromagnetic actuator, 2, air spring, 3, stopping means,
4, eddy current displacement sensor, 5, metal leaf spring, 6, radiating of circular piston face,
7, pressure casing wall, 8, pressure casing bottom surface, 9, air valve,
10, electrical interface (electromagnetic actuator input interface, displacement transducer output interface),
11, electric interfaces plate, 12, connector, 13, displacement transducer base,
14, flexible air-bag, 15, semi-circular groove, 16, scalloped recess,
17, source of the gas, 18, three-way air valve, 19, two breather valves,
20, tracheae.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
The invention provides a kind of very low frequency broadband underwater acoustic transducer, have advantages of that volume is little, working depth is high, can realize very low frequency, broadband, high-power acoustic radiation under water.
According to the very low frequency broadband underwater acoustic transducer structure of the present invention's development as shown in Figure 2, its integral body is cylindrical, pressure casing, leaf spring, radiating of circular piston face, air spring, electromagnetic actuator, eddy current displacement sensor, electric interfaces plate and some connectors, consists of.
Described pressure casing consists of wall 7 and bottom surface 8 two parts, and the two is bolted; Described radiating of circular piston face 6 is positioned at the upper surface of pressure casing wall 7, and its longitudinal piston vibration is to transducer external radiation sound wave; Inner at transducer, radiating of circular piston face 6 is supported by air spring 2, utilizes air spring 2 to connect radiating of circular piston face 6 and pressure casing bottom surface 8; In the inner chamber supporting at air spring 2, electromagnetic actuator 1 is installed, the output of electromagnetic actuator is secured by bolts on the through hole at radiating of circular piston face 6 centers, thereby for exciting longitudinal piston vibration of radiating of circular piston face 6 to outside radiative acoustic wave; Described electromagnetic actuator 1 is screwed on electric interfaces plate 11, and electric interfaces plate 11 is screwed on pressure casing bottom surface 8, and electric interfaces plate 11 and pressure casing bottom surface 8 the two use O type circle seal, and guarantee watertightness; Described eddy current displacement sensor 4 is installed on the top of electromagnetic actuator 1 by base 13, for monitoring the length travel of radiating of circular piston face 6, thereby coordinate external pressure control system (structure of described external pressure control system as mentioned below) to regulate air chamber internal gas pressure, maintain radiating of circular piston face 6 all the time in equilbrium position, realize the static balance of air chamber air pressure inside and external water pressure.
Air valve 9 and electrical interface 10 are installed on described electric interfaces plate 11, and wherein electrical interface 10 comprises electromagnetic actuator input interface and displacement transducer output interface two parts; During transducer work, need to use watertight cable to connect electrical interface 10, should use tracheae to connect air valve 9 simultaneously.
Described external pressure control system is mainly comprised of source of the gas 17, three-way air valve 18, two breather valves 19, as shown in Figure 4.Wherein 1., 3. three-way air valve 18 gas ports pass through respectively tracheae 20 connection two breather valves 19 and sources of the gas 17, and 2. its another gas port directly leads to atmosphere, and two breather valve 19 another gas ports connect transducer air valves 9 by tracheae 20.The concrete adjustment process of air pressure is as follows: first open two breather valves 19; Secondly according to the current location of displacement transducer 4 output signal judgement radiating of circular piston faces 6, if higher than equilbrium position, the position that radiating of circular piston face 6 was exitted, reduced to UNICOM's three-way air valve 18 gas ports 1. and 2., otherwise the position that radiating of circular piston face 6 was inflated, improved to UNICOM's gas port 1. and 3.; When radiating of circular piston face 6 is adjusted to equilbrium position, close two breather valves 19, complete air pressure adjustment process.Above-mentioned manual adjustments process also can be used PID controller and three-way servo air valve automatically to realize, and wherein PID controller is input as displacement transducer 4 output signals, and its output controls to three-way servo air valve the operation that automatically realizes above-mentioned venting, inflation.7 of described radiating of circular piston face 6 and pressure casing walls leave 1mm gap, and use metal leaf spring 5 to connect pressure casing wall 7 and radiating of circular piston face 6 by connector 12; Because metal leaf spring has higher lateral stiffness and lower longitudinal rigidity, therefore can avoid it to occur larger lateral displacement when guaranteeing radiating of circular piston face 6 extensional vibration flexibilities and then produce frictional influence transducer sound Radiation; Connector 12 is screwed in radiating of circular piston face 6 centers, because radiating of circular piston face 6 centers are porose, therefore use O type circle to seal at connector 12 and 6, radiating of circular piston face, realizes watertight.
In pressure casing wall 7 inner sides, stopping means 3 is housed, for length travel, the protection electromagnetic actuator 1 of limited piston radiating surface 6; Stopping means 3 is divided into upper and lower two groups, and every group consists of 3 half-circle projection, is 120 ° of even being distributed on circumference; Correspondence position at radiating of circular piston face 6 circumference is carved with same size semi-circular groove 15 simultaneously, as shown in Figure 3, so that install.
For reducing quality, improving acoustic radiation ability, described radiating of circular piston face 6 and connector 12 are made by the less aluminium of density, and radiating of circular piston face 6 upper surfaces are carved with 8 scalloped recess 16, as shown in Figure 3; Between adjacent scalloped recess, there is muscle, to guarantee the integral rigidity of radiating of circular piston face 6.
The concrete assembling mode of the embodiment of the present invention is as follows:
(1) radiating of circular piston face 6 is installed on to air spring 2 upper ends, and air spring 2 is installed on pressure casing bottom surface 8;
(2) pressure casing wall 7 is connected with pressure casing bottom surface 8, while noting installing, should adjust the angle of being inserted in of pressure casing wall 7, make stopping means 3 over against the semi-circular recesses of radiating of circular piston face 6, when radiating of circular piston face 6 enters between upper and lower stopping means, rotation pressure casing wall, semi-circular recesses and the stopping means 3 of radiating of circular piston face 6 are staggered, thereby correctly realize spacing;
(3) electromagnetic actuator 1 is fixed on electric interfaces plate 11, and electric interfaces plate 11 is fixed on pressure casing bottom surface 8, the two uses the sealing of O type circle, during installation, should make the screw rod at electromagnetic actuator 1 top through the through hole at radiating of circular piston face 6 centers, and adjust the position of screw tip screw, while making radiating of circular piston face 6 be positioned at equilbrium position, screw rod does not stress, and now at radiating of circular piston face 6 upsides, screw is installed and is realized the fixing of screw rod;
(4) connector 12 is installed on to radiating of circular piston face 6 centers, the two uses O RunddichtringO;
(5) at connector 12 and 7 of pneumatic shell walls, leaf spring 5 is installed.
The concrete use step of the embodiment of the present invention is as follows:
(1) use watertight cable to be connected respectively electrical interface and air valve with tracheae, after inspection interface air-tightness and watertightness, transducer is placed in to water precalculated position;
(2) according to the output signal of displacement transducer, coordinate exit/charge operation of external pressure control system, adjust air spring air pressure inside, make radiating of circular piston face in equilbrium position, this process can realize by Manual gas valve manual adjustment, also can use PID controller to coordinate servo air valve automatically to realize;
(3) open electromagnetic actuator power amplifier, after input signal, transducer will be started working.
The invention provides a kind of novel very low frequency broadband underwater acoustic transducer, specifically a kind of electrodynamic type transmitting transducer.Its main feature is to use air spring to support radiating of circular piston face, and encourages its extensional vibration radiative acoustic wave by being installed on the electromagnetic actuator of air spring inside, and utilizes leaf spring to retrain its lateral displacement; For realizing the static balance of its air pressure, hydraulic pressure, use eddy current displacement sensor to monitor the lengthwise position of radiating of circular piston face, and realize the control to air spring air pressure inside by external pressure control system.
Compared with the prior art the present invention, has that volume weight is little, working depth is high, is easy to hang the advantages such as installation, can realize the design object of very low frequency, broadband, high-power acoustic radiation under water.
In addition to the implementation, all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of requirement of the present invention.
Claims (8)
1. an electric water acoustic emission transducer, it is characterized in that, comprise: the pressure casing being formed by wall (7) and bottom surface (8), the air spring (2) of longitudinal extension is set in the inside of pressure casing, and this air spring (2) is for supporting the radiating of circular piston face (6) that is positioned near the horizontal positioned of wall (7) upper port;
Described air spring (2) inside lays one for encouraging the electromagnetic actuator (1) of described radiating of circular piston face (6) extensional vibration and then radiative acoustic wave, described electromagnetic actuator (1) is fixed on the electric interfaces plate (11) that is positioned at pressure casing bottom surface, the power output of described electromagnetic actuator (1) is connected with radiating of circular piston face (6), and the upper surface of this electromagnetic actuator (1) is placed the eddy current displacement sensor (4) that is used for monitoring radiating of circular piston face (6) lengthwise position;
Described electric interfaces plate (11) is fixed on the hollow space of pressure casing bottom surface (8), and on this electric interfaces plate (11), arrange one for regulating air valve (9) and an electrical interface (10) of air spring (2) air pressure inside, and this electrical interface (10) further comprises the signal output interface of electromagnetic actuator (1) input interface and eddy current displacement sensor (4).
2. electric water acoustic emission transducer according to claim 1, it is characterized in that, described electromagnetic actuator (1) is connected with described radiating of circular piston face (6) with screw by screw rod, and described screw rod two ends connect respectively the output of electromagnetic actuator (1) and the central through hole of radiating of circular piston face (6).
3. electric water acoustic emission transducer according to claim 1, it is characterized in that, described transducer also comprises a leaf spring, this leaf spring is positioned at the upper port place of pressure casing wall and connects center and the pressure casing wall (7) of radiating of circular piston face (6), for limiting the lateral displacement of the radiating of circular piston face of this leaf spring below.
4. electric water acoustic emission transducer according to claim 3, is characterized in that, described radiating of circular piston face (6) is connected with leaf spring by a connection piece, and this connector is used O type circle to be fixed on the center of radiating of circular piston face (6), realizes watertight.
5. electric water acoustic emission transducer according to claim 1, it is characterized in that, described transducer also comprises and is arranged near the some laterally zygomorphic stopping means (3) radiating of circular piston face correspondence position inside pressure casing, this stopping means (3) is semicircle sheet projection, for the length travel of limited piston radiating surface;
Described radiating of circular piston face (6) is provided with semi-circular groove (15) some and that semi-cylindrical hill stopping means (3) is measure-alike corresponding to stopping means (3).
6. electric water acoustic emission transducer according to claim 1, is characterized in that, described radiating of circular piston face (6) is made of aluminum, is carved with a plurality of scalloped recess (16) on it.
7. electric water acoustic emission transducer according to claim 1, is characterized in that, described radiating of circular piston face (6) and 1～2 millimeter, wall (7) interval.
8. electric water acoustic emission transducer according to claim 1, it is characterized in that, described electric water acoustic emission transducer regulates the air pressure inside of air spring (2) under the different operating degree of depth by external pressure control system, realize the static balance of hydraulic pressure, air pressure, make radiating of circular piston face (6) in equilbrium position (centers of upper and lower two groups of stopping means), thereby guarantee the normal work of transducer;
Wherein, described external pressure control system structure is:
Described external pressure control system comprises source of the gas (17), three-way air valve (18) and two breather valves (19), wherein the first gas port of three-way air valve (18) is connected two breather valves (19) and source of the gas (17) by tracheae (20) respectively with the 3rd gas port, its second gas port directly leads to atmosphere, and another gas port of two breather valves (19) connects transducer air valve (9) by tracheae (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310071343.2A CN104038862B (en) | 2013-03-06 | 2013-03-06 | Electric acoustic transmitting transducer |
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|---|---|---|---|
| CN201310071343.2A CN104038862B (en) | 2013-03-06 | 2013-03-06 | Electric acoustic transmitting transducer |
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| CN104038862A true CN104038862A (en) | 2014-09-10 |
| CN104038862B CN104038862B (en) | 2017-05-17 |
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| CN201310071343.2A Active CN104038862B (en) | 2013-03-06 | 2013-03-06 | Electric acoustic transmitting transducer |
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| CN107313763A (en) * | 2017-06-23 | 2017-11-03 | 四川大学 | Engineering rock mass acoustic emission monitor(ing) and Transmission system |
| CN107659870A (en) * | 2017-11-22 | 2018-02-02 | 青岛理工大学 | digital underwater acoustic transducer unit, array, device and control method |
| 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 |
| CN109909141A (en) * | 2019-03-26 | 2019-06-21 | 海鹰企业集团有限责任公司 | A kind of energy converter of radiating surface pressure adjustable section |
| RU2716846C2 (en) * | 2015-09-10 | 2020-03-17 | Яюма Аудио Сп. З.О.О. | Audio signal correction method |
| CN111822315A (en) * | 2020-08-12 | 2020-10-27 | 湖南大学 | Electromagnetic underwater acoustic transducer based on gas spring and control method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2716846C2 (en) * | 2015-09-10 | 2020-03-17 | Яюма Аудио Сп. З.О.О. | Audio signal correction method |
| CN107313763A (en) * | 2017-06-23 | 2017-11-03 | 四川大学 | Engineering rock mass acoustic emission monitor(ing) and Transmission system |
| CN107313763B (en) * | 2017-06-23 | 2020-01-10 | 四川大学 | Acoustic emission monitoring and transmission system for engineering rock mass |
| 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 |
| CN107731218B (en) * | 2017-09-28 | 2021-07-06 | 哈尔滨工程大学 | Reciprocating underwater very low frequency sound source |
| CN107659870A (en) * | 2017-11-22 | 2018-02-02 | 青岛理工大学 | digital underwater acoustic transducer unit, array, device and control method |
| CN107659870B (en) * | 2017-11-22 | 2023-08-22 | 青岛理工大学 | Digital underwater acoustic transducer unit, array, device and control method |
| CN109909141A (en) * | 2019-03-26 | 2019-06-21 | 海鹰企业集团有限责任公司 | A kind of energy converter of radiating surface pressure adjustable section |
| CN109909141B (en) * | 2019-03-26 | 2020-07-14 | 海鹰企业集团有限责任公司 | Energy converter with adjustable radiant surface pressure |
| CN111822315A (en) * | 2020-08-12 | 2020-10-27 | 湖南大学 | Electromagnetic underwater acoustic transducer based on gas spring and control method |
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| Publication number | Publication date |
|---|---|
| CN104038862B (en) | 2017-05-17 |
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