CN105430562B - The band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter - Google Patents
The band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter Download PDFInfo
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- CN105430562B CN105430562B CN201510941412.XA CN201510941412A CN105430562B CN 105430562 B CN105430562 B CN 105430562B CN 201510941412 A CN201510941412 A CN 201510941412A CN 105430562 B CN105430562 B CN 105430562B
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- stack
- piezo crystals
- double excitation
- energy converter
- piezo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/44—Special adaptations for subaqueous use, e.g. for hydrophone
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of the band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter, and energy converter includes the front shroud set gradually, preceding stack of piezo crystals, intermediate mass block, rear stack of piezo crystals and back shroud；Forward and backward stack of piezo crystals is formed by piezoelectric ceramics and electrode slice mixed stack of interlocking, preceding stack of piezo crystals is mounted on by screw rod between the front shroud and intermediate mass block, stack of piezo crystals is mounted on by screw rod between the back shroud and intermediate mass block afterwards, the first resistor R1 is connected by positive wire in stack of piezo crystals in the rear, before the second resistance R2 is connected in the rear by positive wire on the brilliant heap of electricity；The undertaken voltage of front and back stack of piezo crystals is set to reduce using the partial pressure effect of resistance, reduce the transmitting voltage response value at the resonant frequency that front and back stack of piezo crystals is controlled, so that the transmitting voltage response in working band rises and falls and reduces, the broadening of double excitation energy converter working band is realized, and overall structure and manufacture craft are simple.
Description
Technical field
The invention belongs to underwater acoustic transducer fields, are related to a kind of the band spread electrical method and bidifly of double excitation energy converter
Encourage underwater acoustic transducer.
Background technology
With being widely used for broadband underwater acoustic transducer, how further to widen the working band of energy converter and make its transmitting
Respond is becoming the important directions that domestic and foreign scholars study energy converter with interior fluctuating small (i.e. frequency response curve is flat).State at present
The method for widening underwater acoustic transducer bandwidth that inside and outside report is introduced has increases acoustic matching layer on front shroud, uses multi-layer Matched layer
Thickness vibration transducer bandwidth can be effectively expanded, but the acoustical behavior of energy converter is multi-party by the thickness of matching layer, the velocity of sound, density etc.
The restriction of face factor, complex manufacturing technology, consistency are difficult to guarantee.Using the various vibration moulds of the principle reasonable arrangement of multi-mode coupling
State, it is this to open up wide band mode and to accurately control the spacing of two or more mode of oscillations, it needs to consider energy converter each section
The many factors such as size.The preceding two ranks longitudinal vibration of ceramic stack reverse phase excitation generation before and after energy converter is reached using double source driving humorous
It shakes, novel transductive material additionally may be used.Current energy converter is all using any of the above technology and its to be combined in a word
Method, realize underwater acoustic transducer in wider frequency ranges of operation.
Two resonant frequencies of double excitation energy converter are mainly controlled by forward and backward stack of piezo crystals, by adjusting energy converter phase
The size answered can change bandwidth of operation, but bandwidth is wider, and transmitting response fluctuating is bigger, and bandwidth is narrower, and transmitting response, which rises and falls, gets over
It is small.So transmitting response rises and falls limits the expansion of wide-band transducer bandwidth with the contradiction of bandwidth to a certain extent.
Invention content
The purpose of the present invention is to provide a kind of band spread electrical methods of double excitation energy converter and the double excitation underwater sound to change
Energy device, the transmitting voltage response value at two resonant frequencies controlled by stack of piezo crystals before and after reduction, makes emitting voltage frequency
Two peak values on response curve reduce, real to too deep trench (transmitting voltage response reduces with interior fluctuating) do not occur
Existing underwater acoustic transducer is in wider frequency ranges of operation.
In order to achieve the above objectives, the present invention uses following technical scheme：
A kind of band spread electrical method of double excitation energy converter, double excitation energy converter includes by piezoelectric ceramics and electrode slice
Staggeredly preceding stack of piezo crystals and rear stack of piezo crystals made of mixed stack, preceding stack of piezo crystals and rear stack of piezo crystals are separately connected electrode and draw
Line is utilized by the way that second resistance R2, first resistor R1 to be connected on to the positive wire of preceding stack of piezo crystals and rear stack of piezo crystals respectively
The partial pressure effect of second resistance R2, first resistor R1 make the undertaken voltage of front and back stack of piezo crystals reduce to reduce forward and backward piezo crystals
Transmitting voltage response value at the resonant frequency of heap control reduces transmitting voltage response of the energy converter in working band and rises and falls,
Realize double excitation energy converter in wider frequency ranges of operation.
A kind of broadband double excitation underwater acoustic transducer, including set gradually front shroud, preceding stack of piezo crystals, intermediate mass block,
Stack of piezo crystals and back shroud afterwards, front shroud, preceding stack of piezo crystals, intermediate mass block, rear stack of piezo crystals and back shroud pass through perforative
Installation screw rod forces together, and preceding stack of piezo crystals, rear stack of piezo crystals are formed by piezoelectric ceramics and electrode slice mixed stack of interlocking, preceding
Stack of piezo crystals and rear stack of piezo crystals are separately connected contact conductor, before second resistance R2 is connected on stack of piezo crystals positive wire；The
One resistance R1 is connected on rear stack of piezo crystals positive wire, and being acted on by the partial pressure of second resistance R2 and first resistor R1 reduces
The voltage that forward and backward stack of piezo crystals undertakes reduces the transmitting voltage response value at the resonant frequency that forward and backward stack of piezo crystals is controlled.
Further, including shell, coarctate front shroud, preceding stack of piezo crystals, intermediate mass block, rear stack of piezo crystals and after
Cover board is installed inside the shell by holder, and the shell is sealed close to front shroud one end by sound transmitting rubber, and the shell other end is logical
Sealing cover closing is crossed, contact conductor is drawn from the via on sealing cover.
Further, the shell is cylindrical shell, and sealing cover is hemispherical, is buckled in cylindrical shell end.
Further, the front shroud is made of LY12 duralumin, and intermediate mass block is made of 45# steel, preceding stack of piezo crystals
It is pressed using PZT-4 piezoelectric ceramics and electrode slice with rear stack of piezo crystals.
Invention has the following advantages：
The band spread electrical method of the double excitation energy converter of the present invention, second resistance R2, first resistor R1 are gone here and there respectively
It is associated in forward and backward stack of piezo crystals, so that the undertaken voltage of front and back stack of piezo crystals is reduced using the partial pressure effect of resistance, reduce front and back pressure
The transmitting voltage response value at resonant frequency that electric crystalline substance heap is controlled, shows on frequency response curve between one group of adjacent peak valley
Difference reduces (i.e. transmitting voltage response rise and fall in working band reduction) so that hair of the energy converter near two resonant frequencies
The amplitude for penetrating the transmitting response reduction of response ratio disresonance frequence is much larger, the transmitting response amplitude at energy converter disresonance frequence
Almost without decline, the broadening of double excitation energy converter working band is realized.The present invention is compared with other wide-band transducers, nothing
Matching layer need to be added, component used is relatively common, and price is also all cheaper, and overall structure and manufacture craft be simple and cost
It is low.
The broadband double excitation underwater acoustic transducer of the present invention is by front shroud, preceding stack of piezo crystals, intermediate mass block, rear piezo crystals
Heap, back shroud, electrode slice, screw rod, first resistor R1, second resistance R2, positive and negative electrode lead composition, in forward and backward stack of piezo crystals
One resistance of series connection respectively makes the undertaken voltage of front and back stack of piezo crystals reduce, reduces front and back piezoelectricity using the partial pressure effect of resistance
Transmitting voltage response value at the resonant frequency that brilliant heap is controlled makes not occurring too deep trench on frequency response curve (in band
Interior fluctuating is small), underwater acoustic transducer is realized in wider frequency ranges of operation.
Description of the drawings
Fig. 1 is the schematic diagram of double excitation underwater acoustic transducer in broadband of the present invention；
Fig. 2 a are the diagrammatic cross-section of the embodiment of the present invention；
Fig. 2 b are the diagrammatic cross-section of another embodiment of the present invention；
Fig. 3 is the equivalent circuit diagram of the present invention；
Fig. 4 is complete energy converter transmission matrix schematic diagram in the present invention；
Fig. 5 is the equivalent circuit diagram of energy converter matrix of two port in the present invention；
Fig. 6 a are transmitting voltage response curve (the front and back stack of piezo crystals of double excitation underwater acoustic transducer in broadband of the present invention
Not series resistance, i.e. R1=0 Ω, when R2=0 Ω)；
Fig. 6 b are transmitting voltage response curve (the preceding stack of piezo crystals string of double excitation underwater acoustic transducer in broadband of the present invention
When joining resistance R2=900 Ω, rear stack of piezo crystals series resistance R1=300 Ω)；
Fig. 7 is energy converter pond test result schematic diagram.
In figure：1- sound transmitting rubbers, 2- shells, 3- holders, the novel energy converters of 4-, 5- sealing covers, 401- front shrouds, before 402-
Stack of piezo crystals, 403- electrode slices, 404- intermediate mass blocks, stack of piezo crystals after 405-, 406- back shrouds, 407- second resistance R2,
408- first resistors R1,409- screw rod, stack of piezo crystals positive wire after 410-, stack of piezo crystals positive wire before 411-.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
With reference to figure 1 and Fig. 2 b, the broadband double excitation underwater acoustic transducer of the present embodiment includes front shroud 401, preceding stack of piezo crystals
402, intermediate mass block 404, rear stack of piezo crystals 405, back shroud 406, screw rod 409, second resistance R2 407, first resistor R1
408, at the front shroud 401, the center of preceding stack of piezo crystals 402, intermediate mass block 404, rear stack of piezo crystals 405, back shroud 406
Screw rod 409 is installed in position, and front shroud 401, back shroud 406 are separately mounted to 409 rear and front end of screw rod, interstitial in bore cylindrical
Gauge block 404 is mounted between the front shroud 401 and back shroud 406, and preceding stack of piezo crystals 402, rear stack of piezo crystals 405 are by piezoelectricity
Staggeredly mixed stack forms ceramics with electrode slice 403, and preceding stack of piezo crystals 402 is mounted on the front shroud 401 and intermediate mass block
Between 404, rear stack of piezo crystals 405 is mounted between the back shroud 406 and intermediate mass block 404, the second resistance R2
407 are connected on by preceding stack of piezo crystals positive wire 411 in the preceding stack of piezo crystals 402；The first resistor R1 408 passes through
Stack of piezo crystals positive wire 410 is connected in stack of piezo crystals 405 in the rear afterwards.
With reference to figure 2a, the present embodiment further includes sealing cover 5, shell 2, holder 3, sound transmitting rubber 1, wherein 2, the shell
Except the broadband double excitation underwater acoustic transducer that installation is complete shown in Fig. 1, in its interior mounting bracket 3；The sealing cover 5 is located at institute
2 rear of shell is stated by shell seal；The sound transmitting rubber 1 is located at 2 front of the shell.
Further, shell 2 is wrapped in whole device shown in Fig. 1 in cylindrical shell, and cylindrical shell holder 3 is housed in shell 2
It keeps energy converter balance, 5 centre position of hemispherical sealing cover to be provided with circular hole, is mounted on 2 rear of shell, sound transmitting rubber 1 is in round platform
Shape is mounted on 2 front of shell, and front shroud 401 is close in inside.
The front shroud be LY12 duralumin, intermediate mass block be 45# steel, stack of piezo crystals using the piezoelectric ceramics of PZT-4 come
It realizes.
The positive wire is drawn with electrode slice anode in rear stack of piezo crystals 405 from preceding stack of piezo crystals 402 and is passed through respectively
Second resistance R2 408, first resistor R1 407 pass through the circular hole in 5 centre position of sealing cover to be connected with driving source；The cathode
The circular hole that lead is drawn through 5 centre position of sealing cover from preceding stack of piezo crystals cathode is connected with driving source.
The present invention realizes that the principle of energy converter working band broadening is：It is driven using double source, by second resistance R2, the first electricity
Resistance R1 is connected on respectively in the forward and backward stack of piezo crystals of energy converter, and voltage is made to pass through second resistance R2, first resistor R1 respectively to transducing
The excitation of stack of piezo crystals reverse phase generates preceding two ranks longitudinal vibration and reaches resonance before and after device, makes front and back pressure using the partial pressure effect of resistance
The undertaken voltage of electric crystalline substance heap reduces, and reduces the transmitting voltage response value at the resonant frequency that front and back stack of piezo crystals is controlled, performance
Difference reduces (trench shoals between two peaks) between one group of adjacent peak valley on frequency response curve, what transmitting voltage response rose and fell
Reduce and realize the broadening of double excitation energy converter working band.
Fig. 3 is the equivalent circuit that the method for widening frequency band of the present invention is applied in the double excitation underwater acoustic transducer of broadband
Figure further uses two-port network matrix that can be expressed as admittance matrix form by circuit equivalent abbreviation and by A, B matrix,
The admittance expression formula that its Equivalent Admittance Matrix C is obtained by the parallel relationship of matrix A, B is respectively：
Further, admittance matrix C is converted into transmission matrix form, complete energy converter transmission matrix is represented by this time
Fig. 4, D=[D1,D2；D3,D4], wherein
Fig. 5 is the equivalent circuit diagram that cascades of transmission matrix C, D, E, L=CDE[ in figure;1,jXW；0,1]L1=
L (1,1), L2=L (1,2), L3=L (2,1), L4=L (2,2)
V=L1F+L2u
I=L3F+L4u
Voltage transmission coefficient is at this time：
For the radiating of circular piston device on infinitely great rigid baffle, directional gain is：
Therefore
Fig. 6 a are forward and backward stack of piezo crystals not series resistance, i.e. R in double excitation underwater acoustic transducer in broadband of the present invention1
=0 Ω, R2When=0 Ω admittance with frequency change curve.
Fig. 6 b are different resistance of connecting respectively in forward and backward stack of piezo crystals, and two resistance sizes of adjustment make second resistance
R2=900 Ω, R1Admittance can reduce the forward and backward stack of piezo crystals of energy converter and be controlled simultaneously with the change curve of frequency when=300 Ω
Two resonant frequencies at conductance response value so that conductance response curve rise and fall smaller, energy converter working band broadening effect
Preferably.
Fig. 7 is energy converter pond test result, the value of control unitary variant R1 (or R2), change R2 (or) test of the value of R1
Transmitting voltage response under different resistance conditions.It verifies after tested, in 14-34kHz frequency ranges, as first resistor R1=0 Ω,
When two resistance R2=0 Ω, i.e., it is 12dB that the transmitting voltage response of energy converter itself, which rises and falls, as first resistor R1=297 Ω, second
When resistance R2=903 Ω, it is 7.3dB, the apparent drop of transmitting response fluctuating that energy converter transmitting voltage response in working band, which rises and falls,
It is low.
Claims (5)
1. a kind of band spread electrical method of double excitation energy converter, it is characterised in that：Double excitation energy converter includes preceding piezo crystals
Heap (402) and rear stack of piezo crystals (405), the preceding stack of piezo crystals (402) and rear stack of piezo crystals (405) by piezoelectric ceramics with
Electrode slice (403) is constituted；Preceding stack of piezo crystals (402) and rear stack of piezo crystals (405) are separately connected contact conductor, by electric by second
Resistance R2, first resistor R1 are connected on respectively on the positive wire of preceding stack of piezo crystals (402) and rear stack of piezo crystals (405), utilize the
The partial pressure effect of two resistance R2, first resistor R1 make the undertaken voltage of front and back stack of piezo crystals reduce to reduce forward and backward stack of piezo crystals
Transmitting voltage response value at the resonant frequency of control reduces transmitting voltage response of the energy converter in working band and rises and falls, real
Existing double excitation energy converter is in wider frequency ranges of operation.
2. a kind of broadband double excitation underwater acoustic transducer, it is characterised in that：Including set gradually front shroud (401), preceding piezo crystals
Heap (402), intermediate mass block (404), rear stack of piezo crystals (405) and back shroud (406), front shroud (401), preceding stack of piezo crystals
(402), intermediate mass block (404), rear stack of piezo crystals (405) and back shroud (406) are pressed in by perforative installation screw rod (409)
Together, preceding stack of piezo crystals (402), rear stack of piezo crystals (405) mixed stack interlocked by piezoelectric ceramics and electrode slice (403) and
At preceding stack of piezo crystals (402) and rear stack of piezo crystals (405) are separately connected contact conductor, and second resistance R2 (407) is connected on preceding pressure
On electric crystalline substance heap positive wire (411)；First resistor R1 (408) is connected on rear stack of piezo crystals positive wire (410), passes through second
The effect of the partial pressure of resistance R2 (407) and first resistor R1 (408) reduces the voltage that forward and backward stack of piezo crystals undertakes, and reduces forward and backward pressure
The transmitting voltage response value at resonant frequency that electric crystalline substance heap is controlled.
3. double excitation underwater acoustic transducer in broadband according to claim 2, it is characterised in that：Including shell (2), force together
Front shroud (401), preceding stack of piezo crystals (402), intermediate mass block (404), rear stack of piezo crystals (405) and back shroud (406) it is logical
Holder (3) is crossed in shell (2), the shell (2) is sealed close to front shroud (401) one end by sound transmitting rubber (1), outside
Shell (2) other end is closed by sealing cover (5), and contact conductor is drawn from the via on sealing cover (5).
4. double excitation underwater acoustic transducer in broadband according to claim 3, it is characterised in that：The shell (2) is cylindrical shell
Shape, sealing cover (5) are hemispherical, are buckled in cylindrical shell end.
5. according to claim 2-4 any one of them broadband double excitation underwater acoustic transducer, it is characterised in that：The front shroud
(401) it is made of LY12 duralumin, intermediate mass block (405) is made of 45# steel, preceding stack of piezo crystals (402) and rear piezo crystals
Heap (405) is pressed using PZT-4 piezoelectric ceramics and electrode slice (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510941412.XA CN105430562B (en) | 2015-12-15 | 2015-12-15 | The band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510941412.XA CN105430562B (en) | 2015-12-15 | 2015-12-15 | The band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter |
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| CN105430562A CN105430562A (en) | 2016-03-23 |
| CN105430562B true CN105430562B (en) | 2018-10-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509137B (en) * | 2017-08-17 | 2019-06-11 | 陕西师范大学 | A kind of small size circumferential direction screw slotting extensional vibration underwater acoustic transducer |
| CN107633837B (en) * | 2017-10-24 | 2020-12-01 | 陕西师范大学 | Longitudinal-radial vibration conversion underwater acoustic transducer of slotted circular tube with periodic structure and transduction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178894A (en) * | 2006-11-10 | 2008-05-14 | 中国科学院声学研究所 | Double resonant vibrations and double promptings longitudinal vibration transducer |
| CN102136268A (en) * | 2011-01-27 | 2011-07-27 | 西北工业大学 | Bent piezoelectric-ceramic low-frequency underwater acoustic transducer |
| CN102309341A (en) * | 2011-09-15 | 2012-01-11 | 华外医疗器械(上海)有限公司 | Ultrasonic transducer |
| CN103372536A (en) * | 2012-04-26 | 2013-10-30 | 上海声定科技有限公司 | Ultrasonic transducer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004010592A2 (en) * | 2002-07-22 | 2004-01-29 | Measurement Specialties, Inc. | Handheld device having ultrasonic transducer for axial transmission of acoustic signals |
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2015
- 2015-12-15 CN CN201510941412.XA patent/CN105430562B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101178894A (en) * | 2006-11-10 | 2008-05-14 | 中国科学院声学研究所 | Double resonant vibrations and double promptings longitudinal vibration transducer |
| CN102136268A (en) * | 2011-01-27 | 2011-07-27 | 西北工业大学 | Bent piezoelectric-ceramic low-frequency underwater acoustic transducer |
| CN102309341A (en) * | 2011-09-15 | 2012-01-11 | 华外医疗器械(上海)有限公司 | Ultrasonic transducer |
| CN103372536A (en) * | 2012-04-26 | 2013-10-30 | 上海声定科技有限公司 | Ultrasonic transducer |
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