CN100530348C - Double resonant vibrations and double promptings longitudinal vibration transducer - Google Patents
Double resonant vibrations and double promptings longitudinal vibration transducer Download PDFInfo
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- CN100530348C CN100530348C CNB2006101144922A CN200610114492A CN100530348C CN 100530348 C CN100530348 C CN 100530348C CN B2006101144922 A CNB2006101144922 A CN B2006101144922A CN 200610114492 A CN200610114492 A CN 200610114492A CN 100530348 C CN100530348 C CN 100530348C
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Abstract
The invention provides a double resonance double-excitation longitudinal vibration transducer, comprising a radiation head (1), a front crystal stack (2), intermediate mass (3), a back crystal stack (6), a tail load (7), a first insulation spacer, a second insulation spacer, a third insulation spacer, a forth insulation spacer, a nut (8) and a prestressed screw (12). By adjusting the series/parallel condition between each piezoelectric ceramic element in the front crystal stack (2) and the back crystal stack (6) and adjusting the connection mode of positive and negative electrodes of the front crystal stack (2) with the positive and the negative electrodes of the back crystal stack (6), a broadband emission transducer or a narrow-band high sensitivity emission transducer can be obtained respectively. The double resonance double-excitation longitudinal vibration transducer provided by the invention is characterized by low mechanical quality factor Qm, wide frequency band, less fluctuation and high sensitivity, and can be used as a broadband or narrow-band sound source in various detecting sonars, unmanned underwater vehicles or underwater communicators.
Description
Technical field
The present invention relates to a kind of transducer, particularly a kind of double resonant vibrations and double promptings longitudinal vibration transmitting transducer, the transducer of this type can be used as all kinds of detection sonars, the broadband or the arrowband sound source of unmanned aircraft and underwater communication equipment under water.
Background technology
In underwater sound field, along with the development of modern sonar technique and weaponry technology, and the making rapid progress of modern signal processing technology, electronic technology, mechanics of communication and computer technology, transducer and transducer array have been proposed more and more higher requirement.The status of broadband transducer technology in follow-up signal is handled is more and more important.In many engineering projects, higher requirement has all been proposed for frequency band.Transducer is the window of physical quantitys such as perception sound, magnetic, electrical, optical, is the front end of all information processings, and the quality that transducer obtains information directly affects follow-up judgement and identification, and wide band transducer can provide more information.The broadband transducer is the Primary Component of surveying communication in underwater sound field, and its performance quality is concerning the transmission of signal and the emission of FM signal, and is therefore most important for sonar detection.
The longitudinal vibration composite bar energy converter is a transducer commonly used at present, and it both can do high-power emission, also can be used as reception array element, and volume is little in light weight, widespread use in the underwater sound and ultrasonic technique.At present only utilize the longitudinal vibration transducer of single vibration mode to be difficult to accomplish mechanical quality factor Qm＜3 (Q
m=f
r/ Δ f, f
rBe resonance frequency, Δ f is a bandwidth), want transducer and have wideer frequency band and have only and adopt multi-modal coupled vibrations to realize.The current method of widening the transducer frequency band has: utilize flexural vibrations, matching layer technology and the multi resonant of the radiation head multiple activation technology of shaking.
The two exciting techniques of double resonance are a kind of important technologies of widening the longitudinal vibration transducer frequency band.Two mode of transducer are designed in suitable frequency range, and the amplitude of adjusting resonance mode simultaneously makes two fluctuatings between the resonance mode point in very little scope, can realize broadband.Grandson well extensively waits in the article " the finite element designs of two excitation wide-band transducers " that is published in 2003 the 3rd phases " acoustics and electronic engineering ", mentioned with two brilliant heaps and realized the broadband, preceding brilliant heap is two series connection, the brilliant heap in back is 4 parallel connections, brilliant heap is in parallel then, and consequently the generation of transducer response rises and falls more than 5dB, and frequency band rises and falls very big, this shows, actual emulation calculate and experiment in be difficult to make fluctuating between two resonance in-3dB.
Summary of the invention
The objective of the invention is to solve the amplitude control problem of the tuning-points of present double resonant vibrations and double promptings longitudinal vibration transducer, thereby a kind of double resonant vibrations and double promptings longitudinal vibration transducer is provided.
The double resonant vibrations and double promptings longitudinal vibration transducer that the present invention proposes comprises radiation head 1, preceding brilliant heap 2, intermediate mass 3, the brilliant heap 6 in back, tail load 7, first, second, third, fourth insulation spacer, nut 8 and prestress screw rod 12, described radiation head 1 and nut 8 are installed in the two ends of prestress screw rod 12 respectively, on the prestress screw rod, on 8 direction, first insulation spacer, preceding brilliant heap 2, second insulation spacer, intermediate mass 3, the 3rd insulation spacer, back brilliant heap the 6, the 4th insulation spacer and tail load 7 are installed successively from radiation head 1 to nut;
Even number sheet piezo ceramic element before described in the brilliant heap 2 is divided into two groups in equal size, after piezo ceramic element in every group is connected respectively, again these two groups of piezo ceramic elements are together in parallel, and the positive electrode 13 of preceding brilliant heap 2 is connected with preceding brilliant positive electrical of piling each the group piezo ceramic element in 2, and the negative electrode 14 of preceding brilliant heap 2 is connected with the preceding brilliant negative electricity of piling each the group piezo ceramic element in 2;
The positive electrode 13 of brilliant heap 2 is electrically connected the positive electrode as transducer before described with the negative electrode 16 of the brilliant heap 6 in back, and the negative electrode 14 of preceding brilliant heap is electrically connected the negative electrode as transducer with the positive electrode 15 of the brilliant heap 6 in back, obtains the transducer of broadband emission; The positive electrode 13 of brilliant heap 2 is electrically connected the positive electrode as transducer before perhaps described with the positive electrode 15 of the brilliant heap 6 in back, and the negative electrode 14 of preceding brilliant heap is electrically connected the negative electrode as transducer with the negative electrode 16 of the brilliant heap 6 in back, obtains the transducer of arrowband high sensitivity emission.
Further, when the piezo ceramic element of the brilliant heap 6 in back is two or more, be in parallel between described each piezo ceramic element, and the negative electrode 16 of the brilliant heap 6 in back is electrically connected to the negative pole of each sheet piezoelectric ceramic piece in this crystalline substance heap, and the positive electrode 15 of the brilliant heap 6 in back is electrically connected to the positive pole of each sheet piezoelectric ceramic piece in this crystalline substance heap.
Further, preceding brilliant heap 2 is 2: 3 with the brilliant number ratio of piling the piezo ceramic element in 6 in back.
Further, the material of described radiation head 1 is a duralumin, and the material of described intermediate mass 3 is a steel, and described tail load 7 materials are brass.
Further, adopt epoxy bond together between the various piece of described transducer.The invention has the advantages that:
The present invention connects the driving source separated into two parts of a transducer by various combination between two driving source positive and negative electrodes, make transducer that different performances be arranged; Can realize broadband and rise and fall for a short time that technology is made simple, can control the bandwidth of operation of transducer;
Double resonant vibrations and double promptings longitudinal vibration transducer provided by the invention can be used as all kinds of detection sonars, the broadband or the arrowband sound source of unmanned aircraft and underwater communication equipment under water, has low mechanical quality factor Qm, bandwidth, highly sensitive characteristics.
Description of drawings
Fig. 1 is the transducer inner structure synoptic diagram among the present invention;
Fig. 2 is the preceding brilliant pile structure synoptic diagram of transducer among the present invention;
Fig. 3 is a brilliant pile structure synoptic diagram behind the transducer among the present invention;
Fig. 4 is the transmitting response test curve of transducer two driving sources under different connected modes among the present invention;
Reference numeral
Brilliant heap behind the brilliant heap 3-intermediate mass 6-before the 1-radiation head 2-
Brilliant heap positive electrode before the 7-tail load 8-nut 12-prestress screw rod 13-
Crystalline substance heap negative electrode behind the brilliant heap positive electrode 16-behind the preceding brilliant heap negative electrode 15-of 14-
Embodiment
Double resonant vibrations and double promptings longitudinal vibration transducer is on the basis of traditional longitudinal vibration transducer, by intermediate mass the driving source separated into two parts.Different connected mode between two driving sources, promptly different excitations to transducer, transducer will have different performances.Can be controlled at resonance frequency in the suitable scope by reasonable distribution radiation head, preceding brilliant heap, intermediate mass, the brilliant heap in back, tail load quality.
The present invention uses two rank resonance modes of transducer by electric excitation mode.By regulating the each several part parameter of transducer, at the intermediate mass place, two nodel lines of the second rank resonance are located in the middle of being controlled at two brilliant heaps the first rank resonant section line traffic control of transducer.Special connected mode makes when the second rank resonance between the forward and backward brilliant heap of the present invention, the vibration phase of two brilliant heaps is anti-phase, if apply in-phase voltage then can not encourage second rank responses, therefore phase place is anti-phase when applying excitation for two brilliant heaps, promptly the negative electrode of the positive electrode of preceding brilliant heap with the brilliant heap in back is connected as an electrode, the negative electrode of preceding brilliant heap is connected as an electrode with the brilliant positive electrode of piling in back, and transducer excitation goes out the response of second rank like this.Owing to two driving sources are anti-phase, response reduces on first rank, and the response of second rank raises, and like this two rank response regulation is arrived suitable amplitude, makes the response of transducer that less fluctuating be arranged, thereby obtains very wide frequency band.
If the forward and backward brilliant heap to transducer applies in-phase voltage, then response is strengthened at the first resonance place, can not encourage the response of second rank, therefore phase place homophase when applying excitation for forward and backward brilliant heap, promptly the negative electrode of the negative electrode of preceding brilliant heap with the brilliant heap in back is connected as an electrode, the positive electrode of preceding brilliant heap is connected as an electrode with the positive electrode of the brilliant heap in back, and the response of transducer first rank is very high like this, transducer has very high emission voltage sensitivity, can be used as highly sensitive arrowband sound source.
Below in conjunction with specific embodiment the present invention is done to describe further.
Frequency as shown in Figure 1 is that 20kHz is to the 40kHz double resonant vibrations and double promptings longitudinal vibration transducer, comprise prestress screw rod 12, nut 8, radiation head 1, preceding brilliant heap 2, intermediate mass 3, the brilliant heap 6 in back, tail load 7 and first, second, third, fourth insulation spacer, wherein, radiation head 1 and nut 8 are separately positioned on the two ends of prestress screw rod 12, on 8 the direction from radiation head 1 to nut first insulation spacer, preceding brilliant heap 2, second insulation spacer, intermediate mass 3, the 3rd insulation spacer, back brilliant heap the 6, the 4th insulation spacer and tail load 7 are installed successively;
Before the piezo ceramic element of brilliant heap 2 by 4 piezoelectric ceramic piece stacked compositions, wherein, first and the series connection of second piezoelectric ceramic piece are as one group, the 3rd and the 4th series connection are organized as another, between two groups for being connected in parallel, as one embodiment of the present of invention, concrete modes of emplacement as shown in Figure 2, be respectively first to the 4th piezoelectric ceramic piece from the bottom to top, with first, the placement that faces up of the positive pole of second piezoelectric ceramic piece, the 3rd, the positive pole of the 4th piezoelectric ceramic piece is placed down, the positive electrode 13 of preceding brilliant heap 2 is electrically connected to the positive pole of second and the 3rd piezoelectric ceramic piece, the negative electrode 14 of preceding brilliant heap 2 is electrically connected to the negative pole of first and the 4th piezoelectric ceramic piece, and is respectively arranged with first and second insulation spacers (not shown among Fig. 2) at the two ends of preceding brilliant heap 2;
The brilliant heap in back is composed in parallel by 6 piezoelectric ceramic pieces, a kind of concrete modes of emplacement as shown in Figure 3, be respectively first to the 6th piezoelectric ceramic piece from the bottom to top, first, the 3rd, the 5th piezoelectric ceramic piece is the negative pole placement that faces up, second, the the 4th and the 6th piezoelectric ceramic piece is the positive pole placement that faces up, the negative electrode 16 of the brilliant heap 6 in back is electrically connected to the negative pole of each sheet piezoelectric ceramic piece in this crystalline substance heap, the positive electrode 15 of the brilliant heap 6 in back is electrically connected to the positive pole of each sheet piezoelectric ceramic piece in this crystalline substance heap, and being respectively arranged with third and fourth insulation spacer (not shown among Fig. 3) at the two ends of this crystalline substance heap, the preceding brilliant heap 2 of transducer and back are brilliant like this piles 6 and draws 4 strip electrode lines altogether.
The radiation head 1 of transducer is a circular platform type, is made by duralumin, and thickness is 15mm, and the front end face of radiation head 1 is a radiating surface, is of a size of φ 45mm, and rear end face is of a size of φ 24mm, is connected with prestress screw rod 12; The piezoelectric ceramic piece of preceding brilliant heap 2 and back crystalline substance heap 6 all is the round-meshed piezoelectric disc in center that " PZT-4 " type piezoceramic material is made, and on prestress screw rod 12, it is of a size of φ 24mm * φ 8mm * 2mm by its circle hole sleeve; The material of insulation spacer is a pottery, and on prestress screw rod 12, size is identical with piezoelectric disc by its circle hole sleeve; Intermediate mass 3 is enclosed within on the prestress screw rod 12 by its manhole for the middle column type that has manhole, and material is the 45# steel, is of a size of φ 24mm * φ 8mm * 4mm; Tail load 7 is enclosed within on the prestress screw rod 12 by its manhole for the middle column type that has manhole, and material is a brass, is of a size of φ 24mm * φ 8mm * 35mm.The each several part of transducer and is connected fasteningly with epoxy bond together with nut 8 with prestress screw rod 12, the array element total length is about 78mm.
As can be seen from Figure 4, when two driving sources of transducer are anti-phase, promptly the positive electrode 13 of preceding brilliant heap 2 and back crystalline substance are piled 6 the negative electrode 16 electricity positive electrodes as transducer in parallel, before during the positive electrode 15 of negative electrode 14 and the brilliant heap 6 in back of brilliant heap 2 negative electrode as transducer electric in parallel, transducer can be realized broadband emission, shown in curve 1, its bandwidth can realize that 18kHz is to 40kHz; The positive electrode 13 of current brilliant heap 2 and brilliant 6 the positive electrode 15 electricity positive electrode as transducer in parallel of piling in back, the negative electrode 14 of preceding brilliant heap 2 and brilliant 6 the negative electrode 16 electricity negative electrodes as transducer in parallel of piling in back, transducer can be realized arrowband high sensitivity emission under this kind combination, shown in curve 2.Transducer its sensitivity when the broadband can reach more than the 145dB, and its sensitivity can reach more than the 150dB during as the arrowband.
Claims (5)
1. double resonant vibrations and double promptings longitudinal vibration transducer, comprise radiation head (1), preceding brilliant heap (2), intermediate mass (3), the brilliant heap in back (6), tail load (7), first, second, the 3rd, the 4th insulation spacer, nut (8) and prestress screw rod (12), described radiation head (1) and nut (8) are installed in the two ends of prestress screw rod (12) respectively, on the prestress screw rod, first insulation spacer is installed successively along direction from radiation head (1) to nut (8), preceding brilliant heap (2), second insulation spacer, intermediate mass (3), the 3rd insulation spacer, the brilliant heap in back (6), the 4th insulation spacer and tail load (7);
It is characterized in that, described before brilliant heap (2) by stacked composition of even number sheet piezo ceramic element of at least two, the described brilliant heap in back (6) is made up of a slice piezo ceramic element at least;
Even number sheet piezo ceramic element before described in the brilliant heap (2) is divided into two groups in equal size, after piezo ceramic element in every group is connected respectively, again these two groups of piezo ceramic elements are together in parallel, and the positive electrode (13) of preceding brilliant heap (2) is connected with preceding brilliant positive electrical of piling each the group piezo ceramic element in (2), and the negative electrode (14) of preceding brilliant heap (2) is connected with the preceding brilliant negative electricity of piling each the group piezo ceramic element in (2);
The positive electrode (13) of brilliant heap (2) is electrically connected the positive pole as transducer before described with the negative electrode (16) of the brilliant heap in back (6), and the negative electrode (14) of preceding brilliant heap is electrically connected the negative electrode as transducer with the positive electrode (15) of the brilliant heap in back (6); The positive electrode (13) of brilliant heap (2) is electrically connected the positive electrode as transducer before perhaps described with the positive electrode (15) of the brilliant heap in back (6), and the negative electrode (14) of preceding brilliant heap is electrically connected the negative electrode as transducer with the negative electrode (16) of the brilliant heap in back (6).
2. by the described double resonant vibrations and double promptings longitudinal vibration transducer of claim 1, it is characterized in that, when the piezo ceramic element of the brilliant heap in back (6) is two or more, be in parallel between described each piezo ceramic element, and the negative electrode of the brilliant heap in back (6) is electrically connected to the negative pole of each sheet piezoelectric ceramic piece in this crystalline substance heap, and the positive electrode of the brilliant heap in back (6) is electrically connected to the positive pole of each sheet piezoelectric ceramic piece in this crystalline substance heap.
3. by the described double resonant vibrations and double promptings longitudinal vibration transducer of claim 1, it is characterized in that the number ratio of the piezo ceramic element in preceding brilliant heap (2) and the brilliant heap in back (6) is 2: 3.
4. by the described double resonant vibrations and double promptings longitudinal vibration transducer of claim 1, it is characterized in that the material of described radiation head (1) is a duralumin, the material of described intermediate mass (3) is a steel, and described tail load (7) material is a brass.
5. by the described double resonant vibrations and double promptings longitudinal vibration transducer of claim 1, it is characterized in that, adopt epoxy bond together between the various piece of described transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101144922A CN100530348C (en) | 2006-11-10 | 2006-11-10 | Double resonant vibrations and double promptings longitudinal vibration transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101144922A CN100530348C (en) | 2006-11-10 | 2006-11-10 | Double resonant vibrations and double promptings longitudinal vibration transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101178894A CN101178894A (en) | 2008-05-14 |
| CN100530348C true CN100530348C (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101144922A Expired - Fee Related CN100530348C (en) | 2006-11-10 | 2006-11-10 | Double resonant vibrations and double promptings longitudinal vibration transducer |
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| CN (1) | CN100530348C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136268B (en) * | 2011-01-27 | 2012-09-05 | 西北工业大学 | Bent piezoelectric-ceramic low-frequency underwater acoustic transducer |
| CN102309341B (en) * | 2011-09-15 | 2014-10-01 | 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 |
| CN104810013B (en) * | 2014-01-23 | 2018-02-16 | 中国科学院声学研究所 | A kind of deep water low frequency compound bar coupler transducer |
| CN104811879B (en) * | 2014-01-23 | 2018-07-03 | 中国科学院声学研究所 | A kind of more piezoelectric ceramic stack excitation deepwater wideband energy converters |
| CN105430562B (en) * | 2015-12-15 | 2018-10-26 | 陕西师范大学 | The band spread electrical method and double excitation underwater acoustic transducer of double excitation energy converter |
| CN107023288B (en) * | 2016-02-01 | 2019-08-20 | 中国科学院声学研究所 | A kind of low frequency extensional vibration energy converter and preparation method thereof for oil well sound wave communication |
| CN110721890A (en) * | 2019-10-25 | 2020-01-24 | 海鹰企业集团有限责任公司 | Light and thin medium-high frequency broadband transduction element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2314369Y (en) * | 1997-09-26 | 1999-04-14 | 同济大学 | Ultrasonic transducer |
| CN1245366A (en) * | 1998-08-13 | 2000-02-23 | 中国科学院声学研究所 | Acoustic surface wave reflecting electrode's width weighed filter with single-phase monodirection transducer |
| US20040169439A1 (en) * | 2002-07-22 | 2004-09-02 | Minoru Toda | Handheld device having ultrasonic transducer for axial transmission of acoustic signals |
-
2006
- 2006-11-10 CN CNB2006101144922A patent/CN100530348C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2314369Y (en) * | 1997-09-26 | 1999-04-14 | 同济大学 | Ultrasonic transducer |
| CN1245366A (en) * | 1998-08-13 | 2000-02-23 | 中国科学院声学研究所 | Acoustic surface wave reflecting electrode's width weighed filter with single-phase monodirection transducer |
| US20040169439A1 (en) * | 2002-07-22 | 2004-09-02 | Minoru Toda | Handheld device having ultrasonic transducer for axial transmission of acoustic signals |
Non-Patent Citations (1)
| Title |
|---|
| 双激励宽带换能器的有限元设计. 孙好广等.声学与电子工程，第3期. 2003 * |
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| CN101178894A (en) | 2008-05-14 |
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Granted publication date: 20090819 Termination date: 20111110 |