CN101699559A - Broadband wide-wave-beam longitudinal vibration transducer - Google Patents
Broadband wide-wave-beam longitudinal vibration transducer Download PDFInfo
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- CN101699559A CN101699559A CN200910153744A CN200910153744A CN101699559A CN 101699559 A CN101699559 A CN 101699559A CN 200910153744 A CN200910153744 A CN 200910153744A CN 200910153744 A CN200910153744 A CN 200910153744A CN 101699559 A CN101699559 A CN 101699559A
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Abstract
The invention relates to a broadband wide-wave-beam longitudinal vibration transducer which mainly comprises a front cover plate, a rear cover plate and a ceramic crystal pile, wherein the ceramic crystal pile is fixed on the front cover plate, the rear cover plate is matched with the front cover plate, and the rear cover plate is pressed on the ceramic crystal pile and extends towards the front cover plate, so that an extending section of the rear cover plate can be formed; the extending section of the rear cover plate is covered outside the ceramic crystal pile, and the part of the extending section of the rear cover plate close to the front cover plate extends outside along the inclined direction, so that the skirt of the rear cover plate can be formed; and the rear cover plate is provided with a prestress bolt which passes through the ceramic crystal pile and is fixed on the front cover plate. The transducer has the advantages that due to the special design of the skirt of the rear cover plate, the directivity of the longitudinal vibration transducer can be expanded, and the requirement of planar array high-angle wave beam scanning can be met; the radiating area of the transducer can be enlarged by the introduction of the skirt of the rear cover plate, and the resonance frequency and the Q value of the transducer are reduced; meanwhile, the longitudinal vibration of the transducer is coupled with the bending vibration of the front cover plate, so that two resonance peaks can be generated, and the sending voltage response bandwidth of the transducer can be further expanded.
Description
Technical field
The present invention relates generally to the underwater acoustic transducer field, mainly is a kind of broadband wide-wave-beam longitudinal vibration transducer.
Background technology
In hydrospace detection and ocean development activity, generally adopt with the oceanographic instrumentation of sound wave as detection means.In miscellaneous oceanographic instrumentation, generally wish that all the underwateracoustic basic matrix has the ability of wide-angle beam scanning, to enlarge its investigative range as much as possible.With the most representative be that multibeam sounding system is an example, its significant advantage of comparing traditional sounding system is, transmit and receive a plurality of different wave beams that point to the angle during its work, form a fan-shaped acoustic propagation district, the beam center by calculating single wave beam and the oblique distance of certain some echo, thereby obtain a plurality of depth of water point data, can carry out gamut nothing left drain sweep survey, improved the efficient and the precision of seabed mapping greatly surveying the district.The third generation deep water multibeam sounding system of main flow in the world, the nominal level coverage reaches 5～6 times of the vertical depth of water, and the sector angle maximum can reach 150 degree, and this has proposed higher requirement to the underwateracoustic basic matrix.For realize the wide-angle beam scanning in bigger sector angle, the array element on the battle array must have enough wide directive property, and in the time of could guaranteeing that main beam deflects into the edge angle, the receiving sensitivity level can not descend too much; In addition, could guarantee that main beam fleet angle (difference between signal delay phasing degree and the sound field actual beam angle of rotation) is smaller when having only the directive property of array element to reach certain width, thereby realize covering the beam scanning of whole sector angle.
Summary of the invention
The present invention will solve the shortcoming of above-mentioned prior art, and a kind of broadband operation performance that has is provided, smaller volume and weight, the broadband wide-wave-beam longitudinal vibration transducer of being convenient to battle array to use.
The present invention solves the technical scheme that its technical matters adopts: this broadband wide-wave-beam longitudinal vibration transducer, mainly comprise the brilliant heap of front shroud, back shroud and pottery, the brilliant heap of pottery is fixed on the front shroud, back shroud matches with front shroud, back shroud is pressed on the brilliant heap of pottery and upward and to the front shroud place extends, form the back shroud extension, the back shroud extension wraps in ceramic brilliant out-pile, stretch out near the front shroud place is oblique the back shroud extension, form the back shroud shirt rim, back shroud is provided with the prestress screw rod, and the prestress screw rod passes the brilliant heap of pottery and is fixed on the front shroud.
The brilliant heap of described pottery is connected in parallel by several potsherds and forms.
The oblique angle of stretching out of described back shroud shirt rim is 20 °～80 °.
The effect that the present invention is useful is: the present invention takes this particular design mode of back shroud shirt rim, widen the directive property of longitudinal vibration transducer, satisfy the requirement of planar array wide-angle beam scanning, the introducing of back shroud shirt rim has increased the swept area of transducer, the resonance frequency and the Q value of transducer have been reduced, the extensional vibration of transducer and the flexural vibrations of front shroud simultaneously are coupled, thereby produce two harmonic peaks, have further widened the transmitting voltage response bandwidth of transducer.Compare with traditional longitudinal vibration transducer, have following characteristics:
1) the directive property broad of transducer, (3dB) generally about 90 degree, and adopt the transducer of this programme design, according to different shirt rim length and the oblique angle of stretching out, beam angle can reach between 130 degree～180 degree its beam angle of traditional longitudinal vibration transducer.
2) the bandwidth of operation broad of transducer, the back shroud shirt rim participates in vibration, has increased the radiating surface area of whole energy transducer, thereby has increased radiation impedance, and the resonance frequency of transducer and the reduction of Q value, bandwidth are broadened; The size of appropriate design transducer front shroud is coupled the extensional vibration of transducer and the flexural vibrations of front shroud, thereby produces two harmonic peaks simultaneously, has further widened the transmitting voltage response bandwidth of transducer.Its transmitting voltage response bandwidth (3dB) can reach one more than the octave.
3) compare with traditional longitudinal vibration transducer of identical central frequency, the transducer of this conceptual design has broadband, broad beam, little, the lightweight characteristics of size, primitive as the underwateracoustic basic matrix preferably uses, and satisfies the needs that sonar system is carried out the wide-angle beam scanning.
Description of drawings
Fig. 1 is a sectional structure synoptic diagram of the present invention;
Fig. 2 is the sectional structure synoptic diagram of back shroud of the present invention;
Fig. 3 is a front shroud structural representation of the present invention;
Fig. 4 is actual measurement transmitting voltage response figure of the present invention;
Fig. 5 is an actual measurement directivity pattern of the present invention.
Description of reference numerals: front shroud 1, the brilliant heap 2 of pottery, back shroud 3, prestress screw rod 4, back shroud extension 5, back shroud shirt rim 6.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in the figure, this broadband wide-wave-beam longitudinal vibration transducer mainly comprises the brilliant heap 2 of front shroud 1, back shroud 3 and pottery, the front shroud 1 general light metal that adopts constitutes, as duralumin or titanium alloy etc., and the back shroud 3 general bigger metals of density that adopt are made, as stainless steel or brass etc.The brilliant heap of pottery 2 is adhesively fixed on front shroud 1 by high-temp epoxy, draw on the brilliant heap 2 of pottery "+;-" two leads, the brilliant heap of pottery 2 is connected in parallel by several potsherds and forms, back shroud 3 matches with front shroud 1, back shroud 3 is pressed on the brilliant heap 2 of pottery and to front shroud 1 place and extends, form back shroud extension 5, back shroud extension 5 wraps in outside the brilliant heap 2 of pottery, back shroud extension 5 is near oblique the stretching out in front shroud 1 place, form back shroud shirt rim 6, the oblique angle of stretching out of back shroud shirt rim 6 is 20 °～80 °, by the radiation backward of back shroud shirt rim 6, increased the radiating surface area of whole energy transducer, thereby increased radiation impedance, therefore this transducer resonance frequency and Q value reduce, and bandwidth broadens; Because the vibration of the vibration of shirt rim and front shroud 1 with superimposed, has increased the energy to transducer oblique rear radiation, make the directivity angle of release widen simultaneously.Back shroud 3 is provided with prestress screw rod 4, and prestress screw rod 4 passes the brilliant heap 2 of pottery and is fixed on the front shroud 1, therefore, prestress screw rod 4 is fixed together back shroud 3, the brilliant heap 2 of pottery and front shroud 1, after applying prestress, put into baking oven, transducer moulding after the heating cure.
The diameter of back shroud shirt rim 6 generally is not more than the diameter of front shroud 1, increases shirt rim length and the oblique angle of stretching out and can obtain wideer directive property, but can bring the increase of transducer volume, becomes battle array to use to transducer and brings adverse effect.Can be according to actual techniques index demand, calculate shirt rim length and stretch out angle by Finite Element Method, averaging out aspect the wide directive property of transducer and the smaller volume two.
Back shroud shirt rim 5 participates in vibration, has increased the radiating surface area of whole energy transducer, thereby has increased radiation impedance, therefore compares with the traditional transducers of equal volume, can obtain resonance frequency and reduce, the beneficial effect that the Q value reduces; The size of appropriate design transducer front shroud is coupled its corner frequency and transducer longitudinal vibration frequency simultaneously, with the bandwidth of further increase transducer, and front shroud as shown in Figure 3, its corner frequency can calculate with formula 1:
Wherein
H＝3.6h/a (h/a≤0.5)
Can get
Here E-Young modulus, ρ-front shroud density, σ-Poisson ratio;
From formula 1 as can be seen, the corner frequency of front shroud 1 is except being subjected to material own influences, and mainly with three relating to parameters, the thickness of front shroud 1 is thick more, and radius is more little, and the slope of tapered segment is more little, and its corner frequency is just high more; The thickness of front shroud 1 is thin more, and radius is big more, and the slope of tapered segment is big more, and its corner frequency is just low more.Calculate the correlation parameter of transducer targetedly with finite element software, the extensional vibration of transducer and the flexural vibrations of front shroud 1 are coupled, thereby produce two harmonic peaks, widened the transmitting voltage response bandwidth of transducer.
Transducer is under the promotion of the brilliant heap 2 of piezoelectric ceramics, and front shroud 1 is emittance forwards, back shroud shirt rim 5 emittance rearward simultaneously, and the two combination increased the beam angle of transducer effectively, makes transducer obtain the effect of broadband, broad beam work.
Requirements such as working frequency range according to the actual requirements, impedance, response, determine the concrete size of front shroud 1, the brilliant heap 2 of pottery and back shroud 3, extensional vibration and front shroud 1 flexural vibrations of guaranteeing transducer can be coupled, thereby obtain more smooth transmitting voltage response, make the transducer can broadband operation; Simultaneously, according to the actual demand of structuring the formation, the length of appropriate design back shroud shirt rim 5, angle etc., the vibration that makes the vibration of shirt rim and front shroud increases the energy to transducer oblique rear radiation with superimposed, thereby obtains the effect of broad beam work.
The suitable underwateracoustic basic matrix primitive as all kinds of sonar systems of the present invention uses, can satisfy sonar system and carry out the needs of wide-angle beam scanning, especially suitable acoustic array primitive as systems such as multibeam echosounding sonar, side-scan sonar, sea-bottom profile instrument is widely used in aspects such as submarine topography topographic feature survey, oceanographic engineering construction, marine resources development, waterway investigation.
In addition to the implementation, all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (3)
1. broadband wide-wave-beam longitudinal vibration transducer, mainly comprise front shroud (1), back shroud (3) and the brilliant heap of pottery (2), it is characterized in that: the brilliant heap of pottery (2) is fixed on the front shroud (1), back shroud (3) matches with front shroud (1), back shroud (3) is pressed on the brilliant heap of pottery (2) and upward and to front shroud (1) locates to extend, form back shroud extension (5), back shroud extension (5) wraps in ceramic brilliant out-pile, oblique stretching out located near front shroud (1) in back shroud extension (5), form back shroud shirt rim (6), back shroud (3) is provided with prestress screw rod (4), and prestress screw rod (4) passes the brilliant heap of pottery (2) and is fixed on the front shroud (1).
2. broadband wide-wave-beam longitudinal vibration transducer according to claim 1 is characterized in that: the described brilliant heap of pottery (2) is connected in parallel by several potsherds and forms.
3. broadband wide-wave-beam longitudinal vibration transducer according to claim 1 is characterized in that: the oblique angle of stretching out of described back shroud shirt rim (6) is 20 °～80 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910153744A CN101699559A (en) | 2009-11-05 | 2009-11-05 | Broadband wide-wave-beam longitudinal vibration transducer |
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| CN200910153744A CN101699559A (en) | 2009-11-05 | 2009-11-05 | Broadband wide-wave-beam longitudinal vibration transducer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121988A (en) * | 2010-11-30 | 2011-07-13 | 中国船舶重工集团公司第七一五研究所 | Broadband sound array for high-resolution color horizontal fish finder |
| CN103021396A (en) * | 2012-12-17 | 2013-04-03 | 中国船舶重工集团公司第七一五研究所 | Deep-water broadband transducer with ultralow backward radiation |
| CN103489440A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工程大学 | Broadband oscillator cross drive underwater acoustic transducer |
| CN108356710A (en) * | 2018-02-05 | 2018-08-03 | 海鹰企业集团有限责任公司 | The method for improving high frequency curved surface longitudinal vibration transducer frequency |
| CN108766412A (en) * | 2018-05-25 | 2018-11-06 | 中国科学院声学研究所东海研究站 | A kind of pressure resistant type underwater sound cylindrical transducer basic matrix |
| CN112099022A (en) * | 2020-08-21 | 2020-12-18 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Broadband sound primitive suitable for long-distance high-resolution fish finder |
| CN112180349A (en) * | 2020-09-15 | 2021-01-05 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Fishing detector transducer shell |
-
2009
- 2009-11-05 CN CN200910153744A patent/CN101699559A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121988A (en) * | 2010-11-30 | 2011-07-13 | 中国船舶重工集团公司第七一五研究所 | Broadband sound array for high-resolution color horizontal fish finder |
| CN103021396A (en) * | 2012-12-17 | 2013-04-03 | 中国船舶重工集团公司第七一五研究所 | Deep-water broadband transducer with ultralow backward radiation |
| CN103489440A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工程大学 | Broadband oscillator cross drive underwater acoustic transducer |
| CN108356710A (en) * | 2018-02-05 | 2018-08-03 | 海鹰企业集团有限责任公司 | The method for improving high frequency curved surface longitudinal vibration transducer frequency |
| CN108766412A (en) * | 2018-05-25 | 2018-11-06 | 中国科学院声学研究所东海研究站 | A kind of pressure resistant type underwater sound cylindrical transducer basic matrix |
| CN108766412B (en) * | 2018-05-25 | 2020-10-02 | 中国科学院声学研究所东海研究站 | Pressure-resistant underwater acoustic cylindrical transducer array |
| CN112099022A (en) * | 2020-08-21 | 2020-12-18 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Broadband sound primitive suitable for long-distance high-resolution fish finder |
| CN112180349A (en) * | 2020-09-15 | 2021-01-05 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Fishing detector transducer shell |
| CN112180349B (en) * | 2020-09-15 | 2022-07-01 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Fishing detector transducer shell |
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Application publication date: 20100428 |