CN105333943A - Sound sensor and sound detection method by using sound sensor - Google Patents
Sound sensor and sound detection method by using sound sensor Download PDFInfo
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- CN105333943A CN105333943A CN201410399938.5A CN201410399938A CN105333943A CN 105333943 A CN105333943 A CN 105333943A CN 201410399938 A CN201410399938 A CN 201410399938A CN 105333943 A CN105333943 A CN 105333943A
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Abstract
The invention discloses a sound sensor and a sound detection method by using the sound sensor. The sound sensor comprises a shell, a friction motor, a detection device and a processing device, wherein the friction motor is arranged in the shell and generates deformation under effects of sound waves generated by a sound source, electric signals are outputted based on generation of the deformation, and the sound waves generated by the sound source are propagated in a medium; the detection device is electrically connected with the friction motor for detecting the electric signals outputted by the friction motor; and the processing device is electrically connected with the detection device for receiving the detected electric signals and acquiring related information of the sound source according to the electric signals. Through using the above sound sensor and the sound detection method, sound in the medium can be detected without an additional power supply, sensitivity is high, and the cost is low.
Description
Technical field
The present invention relates to a kind of sound-detection method of sound transducer and use sound transducer.
Background technology
Due to the requirement on sound-detection under water and human development utilize ocean resources in the urgent need to, undersea detection technology has arrived unprecedented development.Sound transducer is the important component part of undersea detection system, usually adopts such as based on the super magnetostrictive rare-earth sensor of new material, electrostriction ceramics sensor and low frequency large-area piezoelectricity film (PVDF) sensor and based on the vector sensor of new ideas and new method and Fibre Optical Sensor etc. in prior art.But all there are some shortcomings in these sensors, such as the problem that material is low compared with crisp, eddy current loss large (as ceramic sensor element), temperature influence large (as Fibre Optical Sensor) and sensitivity etc.
Summary of the invention
The object of this invention is to provide a kind of sound transducer and use the sound-detection method of sound transducer, to solve sensor material of the prior art compared with crisp, that eddy current loss is large, temperature influence is large and sensitivity is low etc. problem.
To achieve these goals, the invention provides a kind of sound transducer, wherein, this sound transducer comprises: shell; Friction generator, is arranged in described shell, and produce deformation under the sound wave effect that this friction generator produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well; Pick-up unit, with described triboelectricity mechatronics, for detecting the electric signal that described friction generator exports; And treating apparatus, be electrically connected with described pick-up unit, for receiving detected electric signal and obtaining the relevant information of sound source according to this electric signal.
Present invention also offers a kind of sound-detection method using sound transducer, wherein, the method comprises: produce deformation under the sound wave effect that friction generator produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well; Pick-up unit detects the electric signal that described friction generator exports; And treating apparatus receive detected by electric signal and obtain the relevant information of sound source according to this electric signal.
Pass through technique scheme, deformation is produced under the sound wave effect that the friction generator of sound transducer produces in sound source, and produce based on this deformation and export electric signal, the pick-up unit of sound transducer detects the electric signal that described friction generator exports, and the treating apparatus of sound transducer receive detected by electric signal and obtain the relevant information of sound source according to this electric signal.Thus, just can realize the detection to the sound (medium medium and low frequency and the faint audible target such as such as deep underwater pipes, oil well, deep-sea) in medium without the need to additional power source, and above-mentioned sound transducer and sound-detection method has highly sensitive, that cost is low advantage.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the sound transducer according to one embodiment of the present invention;
Fig. 2 is the structural representation of the friction generator of sound transducer according to one embodiment of the present invention;
Fig. 3 A and 3B is the schematic diagram of the electric signal produced under sound wave effect according to the sound transducer of one embodiment of the present invention;
Fig. 4 A to 4D is the fundamental diagram of the friction generator of sound transducer according to one embodiment of the present invention; And
Fig. 5 is the process flow diagram of the sound-detection method of use sound transducer according to one embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the structural representation of the sound transducer according to one embodiment of the present invention.
As shown in Figure 1, the invention provides a kind of sound transducer to comprise: shell 10; Friction generator 20, is arranged in described shell 10, and produce deformation under the sound wave effect that this friction generator 20 produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well; Pick-up unit 30, is electrically connected with described friction generator 20, for detecting the electric signal that described friction generator 20 exports; And treating apparatus 40, be electrically connected with described pick-up unit 30, for receiving detected electric signal and obtaining the relevant information of sound source according to this electric signal.
Wherein, the medium related in the present invention can for can the medium of transmitting vibrations energy, such as gas or liquid.Pick-up unit 30 can such as, for detecting the device of voltage or current signal, current/voltage table and voltage/current amplifier.The relevant information of described sound source can comprise the vibration frequency of sound source, amplitude and position.
By above-mentioned embodiment, deformation is produced under the sound wave effect that the friction generator 20 of sound transducer produces in sound source, and produce based on this deformation and export electric signal, the pick-up unit 30 of sound transducer detects the electric signal that described friction generator 20 exports, and the treating apparatus 40 of sound transducer receives detected electric signal and obtain the relevant information of sound source according to this electric signal.Thus, just can realize the detection to the sound (medium medium and low frequency and the faint audible target such as such as deep underwater pipes, oil well, deep-sea) in medium without the need to additional power source, and above-mentioned sound transducer has highly sensitive, that cost is low advantage.
Fig. 2 is the structural representation of the friction generator of sound transducer according to one embodiment of the present invention.
As shown in Figure 2, friction generator 20 comprises the first frictional layer 201, substrate 202, first conducting element 203, second frictional layer 204 and the second conducting element 205, and wherein, described substrate 202 is for supporting described first frictional layer 201; Described first conducting element 203 to be arranged between described first frictional layer 201 and described substrate 202 and to contact with described substrate 202 with described first frictional layer 201 (such as, can be fixed on above described first frictional layer 201); Described second conducting element 205 arranges (such as, can be fixed on above described second frictional layer 204) (such as, can be fixed on above described second frictional layer 204) above described second frictional layer 204 and contact with described second frictional layer 204; First frictional layer 201 described in when not having sound wave effect and predetermined gap between described second frictional layer 204; First frictional layer 201 described in when there is sound wave effect contacts with each other with described second frictional layer 204 and is separated, and exports described electric signal by described first conducting element 203 and described second conducting element 205.
Wherein, described first conducting element 203 and described second conducting element 205 can be formed by the mode (such as electron beam evaporation, plasma sputtering, magnetron sputtering or evaporation etc.) of deposition respectively on described first frictional layer 201 with described second frictional layer 204.Substrate 202 can be solid material, and such as plastics (PMMA, PC), metal and compound etc., by the support of substrate 202 to the first frictional layer 201, can guarantee that the first frictional layer 201 does not keep stationary state by sound wave affects.
According to one embodiment of the present invention, described first conducting element 203 and described second conducting element 205 are connected to pick-up unit 30 by wire 206.
According to one embodiment of the present invention, described first frictional layer 201 keeps stationary state usually, and described second frictional layer 204 can produce deformation under the effect of described sound wave.
According to one embodiment of the present invention, described shell 10 is pneumatic shell, the housing of described pneumatic shell is provided with opening, be embedded with sound transparent layer in described opening, the described sound wave propagated in media as well acts on the second frictional layer 204 of described friction generator through described sound transparent layer and makes described second frictional layer 204 produce deformation.Thus, described first frictional layer 201 can contact with each other with described second frictional layer 204 and be separated, and exporting described electric signal by described first conducting element 203 and described second conducting element 205, the electric signal (current/voltage signal) of this output and the relation of time be (Fig. 3 A and Fig. 3 B is the schematic diagram of the electric signal produced under sound wave effect according to the sound transducer of one embodiment of the present invention) as shown in Figure 3 A and Figure 3 B.Wherein, sound transparent layer can be formed by corrosion-resistant, compression resistance, material that entrant sound ability is strong, such as silicon rubber, the size of described sound transparent layer is greater than the size of described first frictional layer and the second frictional layer, preferably, described sound transparent layer is of a size of 1.1 to 10 times of the size of described first frictional layer and the second frictional layer.In addition, the distance range of sound transparent layer and friction generator is 1cm to 5cm.
Wherein, shown pneumatic shell refers to the housing that can bear certain pressure in media as well, and those skilled in the art can select the shell that can bear corresponding pressure according to actual needs, and the present invention does not limit this.For sound transparent layer (or opening), its quantity can be one also can be multiple, the sound transparent layer of right quantity can be embedded into the diverse location of the housing of pneumatic shell by those skilled in the art according to actual needs, such as, on the upper bottom surface that sound transparent layer can be embedded into right cylinder pneumatic shell and/or sidewall, or embed on six faces of rectangular parallelepiped pneumatic shell.In addition, the quantity of the friction generator arranged in pneumatic shell for one or more, can be oppositely arranged with sound transparent layer, when the number of described opening is identical with the number of described friction generator, be preferably one_to_one corresponding to arrange, a friction generator is set near each sound transparent layer.
Described pneumatic shell is called withstand voltage chamber around the cavity formed, the air chamber of this is withstand voltage chamber can be air chamber, such as right cylinder or rectangular parallelepiped.Friction generator is arranged on the position that in this withstand voltage chamber, acoustic pressure is the strongest.Wherein, described first frictional layer 201, substrate 202 and the shape of the second frictional layer 203 and the mating shapes in withstand voltage chamber.
According to one embodiment of the present invention, described first frictional layer 201 and described second frictional layer 204 can be conductive material, insulating material or semiconductor material.Wherein, the surface that described first frictional layer 201 is relative with described second frictional layer 204 can have different triboelectric characteristics, and (conventional high molecular polymer, semiconductor etc. all have triboelectric characteristics, all can be used as the material of the first frictional layer 201 and described second frictional layer 204), namely there is between the surface that described first frictional layer 201 is relative with described second frictional layer 204 friction electrode sequence difference, thus make the two can produce contact electric charge in the process coming in contact friction.When the apparent surface of the first frictional layer 201 and the second frictional layer 204 material electronic capability difference larger (namely far away in the difference of the position in electrode sequence that rubs) time, the electric signal of friction generator output is stronger.Therefore, those skilled in the art according to actual needs, can select suitable material to make the first frictional layer 201 and the second frictional layer 204, to obtain better output effect.
Wherein, described conductive material can be selected from metal and conductive oxide, the alloy that described metal can be selected from gold, silver, platinum, aluminium, nickel, copper, titanium, chromium, tin and be formed by above-mentioned metal.
Wherein, insulating material can be selected from following material: teflon, dimethyl silicone polymer, polyimide, poly-diphenyl propane carbonic ester, polyethylene terephthalate, aniline formaldehyde resin, polyoxymethylene, ethyl cellulose, polyamide, melamino-formaldehyde, polyglycol succinate, cellulose, cellulose ethanoate, polyethylene glycol adipate, polydiallyl phthalate, regenerated fibre sponge, polyurethane elastomer, styrene-acrylonitrile copolymer multipolymer, styrene-butadiene-copolymer, regenerated fiber, polymethacrylate, polyvinyl alcohol (PVA), polyester, polyisobutylene, polyurethane flexible sponge, polyvinyl butyral, phenolics, neoprene, butadiene-propylene copolymer, natural rubber, polyacrylonitrile, poly-(vinylidene chloride-co-vinyl cyanide), tygon third diphenol carbonate, polystyrene, polymethylmethacrylate, polycarbonate, polymeric liquid crystal copolymer, polychlorobutadiene, poly-biphenol carbonic ester, CPPG, polychlorotrifluoroethylene, polyvinylidene chloride, tygon, polypropylene, Polyvinylchloride and Parylene.
Wherein, described semiconductor material can be selected from following material: silicon, germanium, the IIIth and the Vth compounds of group are (such as, gallium arsenide and gallium phosphide), the IIth and the VIth compounds of group (such as, cadmium sulfide and zinc sulphide), the solid solution (such as, gallium aluminum arsenide and gallium arsenic phosphide) be made up of III-V compounds of group and II-VI compounds of group, amorphous glass semiconductor and organic semiconductor.
Alternatively, metal, non-conductive oxide, conductor oxidate and complex oxide also have triboelectric characteristics, surface charge can be formed in friction process, therefore also can be used as the material be coated on the first frictional layer 201 surface relative with described second frictional layer 204.The such as oxide of manganese, chromium, iron, copper, and monox, manganese oxide, chromium oxide, iron oxide, cupric oxide, zinc paste, BiO
2and Y
2o
3; The alloy that conventional metal can comprise gold, silver, platinum, aluminium, nickel, copper, titanium, chromium, tin and be formed by above-mentioned metal.In addition, other materials with conductive characteristic can also be used to serve as the frictional layer coating material easily losing electronics, the semiconductor of such as indium tin oxide ITO and doping.
According to one embodiment of the present invention, the surface that described first frictional layer 201 is relative with described second frictional layer 204 has the microstructure of micron or secondary micron dimension, and described microstructure is one or more in following structure: nano wire, nanotube, nano particle, nanometer channel, micron trenches, nanocone, micron cone, nanosphere and micron chondritic.Thus, the contact area between described first frictional layer 201 and described second frictional layer 204 can be increased, thus increase the contact quantity of electric charge.The microstructure of described micron or secondary micron dimension can be realized by photoengraving, chemical etching and plasma etching etc., also can by nano material intersperse or the mode of coating realizes.
According to one embodiment of the present invention, chemical modification can be carried out in the surface relative with described second frictional layer 204 to described first frictional layer 201, making in polarity is that (namely positive material surface introducing easily loses the functional group of electronics, strong to electron cloud, such as amino, hydroxyl, alkoxy etc.) and be that (namely negative material surface introducing easily obtains the functional group of electronics in polarity, strong electrophilic group, such as acyl group, carboxyl, nitro, sulfonic group etc.), thus the transfer amount of electric charge when mutually sliding can be improved further, thus improve the output power of triboelectric charge density and friction generator, or making in polarity is that positive material surface is introduced positive charge and is that negative material surface introduces negative charge in polarity, the mode such as can introducing charged groups by chemical bonding realizes.
There is the preferred polystyrene of material of negative polarity friction electrode sequence, tygon, polypropylene, poly-diphenyl propane carbonic ester, polyethylene terephthalate, polyimide, Polyvinylchloride, dimethyl silicone polymer, polychlorotrifluoroethylene and teflon and Parylene (comprising Parylene C, Parylene N, Parylene D, Parylene HT or Parylene AF4), there is the preferred aniline formaldehyde resin of friction electrode sequence material of positive polarity, polyoxymethylene, ethyl cellulose, polyamide nylon 11, polyamide nylon 66, wool and fabric thereof, silk and fabric thereof, paper, polyglycol succinate, cellulose, cellulose acetate, polyethyleneglycol adipate, polydiallyl phthalate, regenerated cellulosic sponge, cotton and fabric thereof, polyurethane elastomer, styrene-acrylonitrile copolymer, Styrene-Butadiene, wood, rubberite, acetate, regenerated fiber, polymethylmethacrylate, polyvinyl alcohol (PVA), polyester, copper, aluminium, gold, silver and steel.
According to one embodiment of the present invention, described first conducting element 203 and/or the second conducting element 205 are selected from metal and conductive oxide, the alloy that described metal is selected from gold, silver, platinum, aluminium, nickel, copper, titanium, chromium, tin and is formed by above-mentioned metal.
According to one embodiment of the present invention, described first frictional layer 201, first conducting element 203, second frictional layer 204 and the second conducting element 205 can be flexible, it can be such as film, the thickness range of described first frictional layer 201 and the second frictional layer 204 can be 50 nanometers to 5 millimeter, being preferably 100 nanometers to 2 millimeter, is more preferably 1 micron to 800 microns; First conducting element 203 and the second conducting element 205 are as two electrodes of friction generator, as long as possess the characteristic of conduction, such as can be selected from metal or conductive oxide film (preferable alloy film, such as aluminium film, golden film, copper film), thickness range can be 10 nanometers to 2 millimeter, be preferably 50 nanometers to 1 millimeter, be preferably 100 nanometers to 50 micron.Wherein, described first frictional layer 201 can adopt thickness to be such as Teflon (teflon) film of 25 microns, first conducting element 203 can adopt thickness to be such as the metal copper film of 100 nanometers, second frictional layer 204 can adopt thickness to be the metallic aluminium film of 100 nanometers, second conducting element 205 can adopt indium tin oxide ito thin film, and the macro-size of these films can be 5cm × 7cm.
It will be appreciated by those skilled in the art that material, thickness, size etc. listed in above-mentioned embodiment are all exemplary, be not intended to limit the present invention.
Fig. 4 A to Fig. 4 D is the fundamental diagram of the friction generator of sound transducer according to one embodiment of the present invention.
Be described below in conjunction with the principle of work of Fig. 4 A to Fig. 4 D to friction generator of the present invention, wherein, the first frictional layer 201 adopts conductor material, and the second frictional layer 204 adopts insulating material.
As shown in Figure 4 A, under original state, preset distance of being separated by between the upper surface of the first frictional layer 201 and the lower surface of the second frictional layer 204, does not have electric charge to produce therebetween, does not have electric potential difference between the first conducting element 203 and the second conducting element 205 yet.When sound source produces sound wave, two frictional layers contact with each other under sound wave effect, produce Charger transfer in friction process, between two electrodes, now also do not have electric potential difference (see Fig. 4 A) between two conducting elements.When two frictional layers start to be separated, fricative positive and negative charge forms dipole moment, and then electric potential difference is formed between two conducting elements, this electric potential difference drives the free electron in the first conducting element 203 (or first frictional layer 201) to be flow on the second conducting element 205 by external circuit, thus produces an extrinsic current (see Fig. 4 B).When two frictional layers separation reach maximum, produce the highest output (see Fig. 4 C).When two frictional layers gradually near time, electric potential difference reduces gradually, electronics in second conducting element 203 (or first frictional layer 201) flows back to the first conducting element 205, thus provides a rightabout extrinsic current, until two frictional layers contact (see Fig. 4 D) again.Move and so forth, form alternating pulsing current.
Fig. 5 is the process flow diagram of the sound-detection method of use sound transducer according to one embodiment of the present invention.
As shown in Figure 5, a kind of sound-detection method of sound transducer that uses provided by the invention comprises:
S500, produce deformation under the sound wave effect that friction generator produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well;
S502, pick-up unit detects the electric signal that described friction generator exports; And
S504, the electric signal detected by treating apparatus receives also obtains the relevant information of sound source according to this electric signal.
Pass through said method, deformation is produced under the sound wave effect that friction generator produces in sound source, and produce based on this deformation and export electric signal, pick-up unit detects the electric signal that described friction generator exports, and treating apparatus receive detected by electric signal and obtain the relevant information of sound source according to this electric signal.Thus, just can realize the detection to the sound (medium medium and low frequency and the faint audible target such as such as deep underwater pipes, oil well, deep-sea) in medium without the need to additional power source, and above-mentioned detection method has highly sensitive, that cost is low advantage.
According to one embodiment of the present invention, described friction generator comprises the first frictional layer, substrate, the first conducting element, the second frictional layer and the second conducting element, and wherein, described substrate is for supporting described first frictional layer; Described first conducting element to be arranged between described first frictional layer and described substrate and with described first frictional layer and described substrate contact; Described second conducting element to be arranged on above described second frictional layer and to contact with described second frictional layer; First frictional layer described in when not having sound wave effect and predetermined gap between described second frictional layer; First frictional layer described in when there is sound wave effect contacts with each other with described second frictional layer and is separated, and exports described electric signal by described first conducting element and described second conducting element.
According to one embodiment of the present invention, described first frictional layer keeps stationary state, and described second frictional layer produces deformation under the effect of described sound wave.
Disclosed in the above-mentioned embodiment of the present invention, sound transducer and sound detection method can be applied in the environment such as liquid, gas or biosome.Particularly can apply in a liquid, the detections such as such as, military target in ocean or seabed resources, also can be applied to the safety monitoring aspect of oil pipeline or city supply water pipeline.Equally, can also be applied to some dangerous and be unsuitable for applying the particular surroundings of extra power, such as, in low temperature or radiation environment.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (17)
1. a sound transducer, wherein, this sound transducer comprises:
Shell;
Friction generator, is arranged in described shell, and produce deformation under the sound wave effect that this friction generator produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well;
Pick-up unit, with described triboelectricity mechatronics, for detecting the electric signal that described friction generator exports; And
Treating apparatus, is electrically connected with described pick-up unit, for receiving detected electric signal and obtaining the relevant information of sound source according to this electric signal.
2. sensor according to claim 1, wherein, described friction generator comprises the first frictional layer, substrate, the first conducting element, the second frictional layer and the second conducting element, wherein,
Described substrate is for supporting described first frictional layer;
Described first conducting element to be arranged between described first frictional layer and described substrate and with described first frictional layer and described substrate contact;
Described second conducting element to be arranged on above described second frictional layer and to contact with described second frictional layer;
First frictional layer described in when not having sound wave effect and predetermined gap between described second frictional layer; First frictional layer described in when there is sound wave effect contacts with each other with described second frictional layer and is separated, and exports described electric signal by described first conducting element and described second conducting element.
3. sensor according to claim 2, wherein, described first frictional layer keeps stationary state, and described second frictional layer produces deformation under the effect of described sound wave.
4. sensor according to claim 3, wherein, described shell is pneumatic shell, the housing of described pneumatic shell is provided with opening, be embedded with sound transparent layer in described opening, the described sound wave propagated in media as well makes described second frictional layer produce deformation through described sound transparent layer acts on described second frictional layer of described friction generator.
5. sensor according to claim 4, wherein, the distance range of described sound transparent layer and described friction generator is 1cm to 5cm.
6. sensor according to claim 5, wherein, the housing of described pneumatic shell is provided with one or more described opening.
7. sensor according to claim 6, wherein, be provided with multiple described friction generator in described shell, the number of described opening is identical with the number of described friction generator, and described friction generator and described sound transparent layer one_to_one corresponding are arranged.
8. sensor according to claim 4, wherein, the size of described sound transparent layer is greater than the size of described first frictional layer and described second frictional layer.
9. sensor according to claim 4, wherein, described first frictional layer and described second frictional layer are conductive material, insulating material or semiconductor material.
10. sensor according to claim 4, wherein, the surface that described first frictional layer is relative with described second frictional layer has the microstructure of micron or secondary micron dimension, and described microstructure is one or more in following structure: nano wire, nanotube, nano particle, nanometer channel, micron trenches, nanocone, micron cone, nanosphere and micron chondritic.
11. sensors any one of claim 1-10 described in claim, wherein, described first frictional layer, the first conducting element, the second frictional layer and the second conducting element are film.
12. sensors according to claim 11, wherein, the thickness range of described first frictional layer and described second frictional layer is 50 nanometers to 5 millimeter, and the thickness range of described first conducting element and the second conducting element is 10 nanometers to 2 millimeter.
13. sensors according to claim 11, wherein, described pneumatic shell is right cylinder or rectangular parallelepiped around the withstand voltage chamber formed.
14. 1 kinds of sound-detection methods using sound transducer, wherein, the method comprises:
Produce deformation under the sound wave effect that friction generator produces in sound source, and produce based on this deformation and export electric signal, the sound wave that wherein said sound source produces is propagated in media as well;
Pick-up unit detects the electric signal that described friction generator exports; And
Electric signal detected by treating apparatus receives also obtains the relevant information of sound source according to this electric signal.
15. methods according to claim 14, wherein, described friction generator comprises the first frictional layer, substrate, the first conducting element, the second frictional layer and the second conducting element, wherein,
Described substrate is for supporting described first frictional layer;
Described first conducting element to be arranged between described first frictional layer and described substrate and with described first frictional layer and described substrate contact;
Described second conducting element to be arranged on above described second frictional layer and to contact with described second frictional layer;
First frictional layer described in when not having sound wave effect and predetermined gap between described second frictional layer; First frictional layer described in when there is sound wave effect contacts with each other with described second frictional layer and is separated, and exports described electric signal by described first conducting element and described second conducting element.
16. methods according to claim 15, wherein, described first frictional layer keeps stationary state, and described second frictional layer produces deformation under the effect of described sound wave.
17. methods according to claim 15, wherein, the sound wave that described sound source produces is propagated in liquid, gas or biosome.
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| CN109470354A (en) * | 2018-11-16 | 2019-03-15 | 大连海事大学 | From driving Ship Vibration monitoring and fault diagnosis system |
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Application publication date: 20160217 |