CN200983671Y - 2D co-shaking voltage porcelain vector water hearer - Google Patents
2D co-shaking voltage porcelain vector water hearer Download PDFInfo
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- CN200983671Y CN200983671Y CN 200620172380 CN200620172380U CN200983671Y CN 200983671 Y CN200983671 Y CN 200983671Y CN 200620172380 CN200620172380 CN 200620172380 CN 200620172380 U CN200620172380 U CN 200620172380U CN 200983671 Y CN200983671 Y CN 200983671Y
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- hydrophone
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Abstract
A two-dimensional resonant type piezoelectric ceramic vector hydrophone, which is a sensor apparatus for collecting the vibrating speed information and sound pressure information from a particle in the water sound field, is mainly composed of a piezoelectric bent beam acceleration sensor and a piezoelectric ceramic tube sound pressure hydrophone. A piezoelectric bent beam acceleration sensor bonds a plurality of apertured piezoelectric ceramics which have been divided by an orthogonal electrode and a quantity block to a stressing rod. The ceramic bonding belongs to a parallel connection in electricity. Two radial polarized piezoelectric ceramic tubes are symmetrically arranged on two edges of a supporting board, which belongs to a serial connection in electricity. The acceleration sensitivity of using the piezoelectric acceleration sensor is 6-8 decibels higher than the acceleration sensitivity of using the radial polarized piezoelectric ceramic tubes and the sound pressure receiving sensitivity of using the piezoelectric acceleration sensor is 6 decibels higher than the sound pressure receiving sensitivity of using two paralleled radial polarized piezoelectric ceramic tubes, which balances out the interfering signal of acceleration caused by installing the vector hydrophone on a moving carrier and greatly improves the signal-to-noise ratio of the sound pressure receiving.
Description
Technical field
The utility model and a kind of senser element that is used for while picked up water sound field particle place's vibration velocity information and acoustic pressure information, promptly two dimension is with vibration shape piezoelectric ceramic vector hydrophone.
Background technology
Sound field is a physical field that had both contained vector (particle vibration velocity) and scalar (acoustic pressure).In underwater sound equipment in the past, majority has only used in the sound field acoustic pressure amount to carry out navigation in the water, survey and communicate by letter.The demand that develops to low frequency, broadband, high directivity direction along with sonar technique after the last century the eighties, adopts vector hydrophone to carry out the technology that the water medium and low frequency surveys and develops rapidly.Vector hydrophone has been compared distinguishing feature with pressure hydrophone: the one, can detect particle velocity in the sound field by acceleration transducer (or vibration velocity or displacement transducer), and form the quadrature dipole directive property of two dimension (or three-dimensional); The 2nd, dipole directive property is in the very wide scope of low frequency, and is irrelevant with frequency and hydrophone size; The 3rd, particle velocity and sound pressure phase differ from 90 °; The 4th, volume weight is smaller and light.
These characteristics make vector hydrophone use in following field remarkable superiority: the one, low noise target and seanoise in the water of low frequency, very low frequency are detected, and overcome the huge aperture problem of bringing with the acoustic pressure technology.Two have solved port and starboard resolution smearing problem in the horizontal towed array.The 3rd, realize with the passive direction finding technology of single vector hydrophone low frequency, very low frequency.
Summary of the invention
The purpose of this utility model provides a kind of small size, broad band low frequency, simultaneously in the picked up water two dimension of sound field particle place vibration velocity information and acoustic pressure information with vibration shape piezoelectric ceramic vector hydrophone.
The purpose of this utility model is achieved in that a kind of two dimension is with vibration shape piezoelectric ceramic vector hydrophone, comprise flexural piezoelectric beam acceleration transducer 1 and piezoelectric ceramic tube pressure hydrophone 2, it is characterized in that: flexural piezoelectric beam acceleration transducer 1 is to carry out bonding with mass 3 by stress screw rod 5 piezoelectric ceramic piece 7 that multi-disc is with holes after crossed electrode is cut apart, adopt in parallel the binding on bonding potsherd 7 electricity, the piezoelectric ceramic tube symmetry of two radial polarised in the piezoelectric ceramic pressure hydrophone 2 be installed in supporting bracket 6 two ends, adopt series connection to link on the electricity.Flexural piezoelectric beam acceleration transducer 1 quadrature two paths of signals is drawn respectively; The pressure hydrophone signal is drawn, and totally three road signals are delivered to preamplifier.
Two dimension provided by the utility model is with vibration shape piezoelectric ceramic vector hydrophone, the one, the design of employing cantilever beam acceleration transducer and the piezoelectric ceramic disk of longitudinal polarization are bonded to bent beam and add mass, on piezoelectric disc, adopt crossed electrode to cut apart, adopt in parallel the binding on the electricity, form the quadrature sum signal output of two-dimentional vibration velocity; The 2nd, hydrophone adopts two piezoelectric ceramic tubes of radial polarised, adopts the series connection symmetry to link on electricity, and mechanically symmetry is installed.
More than the realization of two technical measures, make the piezoelectric acceleration sensor acceleration sensitivity will exceed 6～8dB than earthenware with radial polarised; The acoustic pressure receiving sensitivity also increases 6dB than in parallel binding of two pipes, has most importantly solved because vector hydrophone is installed in the acceleration interference signal that causes on the motion carrier and is offset, and improves the signal to noise ratio that acoustic pressure receives greatly.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is that the utility model piezo tube electricity is cut apart connection diagram.
Fig. 3 is the utility model acceleration sensor structure schematic diagram.
Embodiment
The utility model operation principle is as follows: acceleration transducer 1 adopts the cantilever beam arrangements of accelerometers: be bonded to crystalline substance heap rod by a plurality of piezoelectric patches 7, an end of rod is fixed on the supporting bracket 6, the mass loading of the other end and mass 3 bonding formation rod ends.End cap 4 plays the water-stop effect.In sound field under the acoustic wave action, power is delivered on the piezoelectric acceleration sensor 1, make it produce flexural vibrations, because about every piezoelectric patches 7 adopts, up and down, quadrature cuts apart electrode, electrode 8 and external electrode 9 in piezoelectric patches 7 forms adopt connecting circuit shown in Figure 2 just to obtain two times quadrature dipole signal.Pressure hydrophone is formed the vector hydrophone shell by the piezoelectric ceramic tube of two radial polarised, and sound pressure signal is picked up by it in the sound field at this moment.Resulting three road signals just can be done the signal processing of different purposes, as being connected with preamplifier etc., to realize the detection to submarine signal.
Claims (2)
1, a kind of two dimension is with vibration shape piezoelectric ceramic vector hydrophone, comprise flexural piezoelectric beam acceleration transducer (1) and piezoelectric ceramic tube pressure hydrophone (2), it is characterized in that: flexural piezoelectric beam acceleration transducer (1) is to carry out bonding with mass (3) by stress screw rod (5) piezoelectric ceramic piece that multi-disc is with holes (7) after crossed electrode is cut apart, adopt in parallel the binding on bonding potsherd (7) electricity, the piezoelectric ceramic tube symmetry of two radial polarised in the piezoelectric ceramic pressure hydrophone (2) be installed in supporting bracket (6) two ends, adopt series connection to link on the electricity.
2, two dimension according to claim 1 is characterized in that with vibration shape piezoelectric ceramic vector hydrophone: flexural piezoelectric beam acceleration transducer (1) quadrature two paths of signals is drawn respectively; The pressure hydrophone signal is drawn, and totally three road signals are delivered to preamplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620172380 CN200983671Y (en) | 2006-12-14 | 2006-12-14 | 2D co-shaking voltage porcelain vector water hearer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620172380 CN200983671Y (en) | 2006-12-14 | 2006-12-14 | 2D co-shaking voltage porcelain vector water hearer |
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| Publication Number | Publication Date |
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| CN200983671Y true CN200983671Y (en) | 2007-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620172380 Expired - Lifetime CN200983671Y (en) | 2006-12-14 | 2006-12-14 | 2D co-shaking voltage porcelain vector water hearer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431875A (en) * | 2013-09-13 | 2013-12-11 | 于一 | Method and device for increasing linearity of hydrophone |
| CN106124041A (en) * | 2016-07-28 | 2016-11-16 | 北京中智永科技发展有限公司 | A kind of hydrophone of band amplifying circuit |
| CN106706108A (en) * | 2017-03-10 | 2017-05-24 | 中北大学 | MEMS (micro-electromechanical system) co-vibration type spherical vibrator vector hydrophone based on piezoelectric effect |
| CN107063438A (en) * | 2017-03-10 | 2017-08-18 | 中北大学 | MEMS three-dimensional co-vibrating type vector hydrophones based on piezo-electric effect |
| CN113639852A (en) * | 2021-07-20 | 2021-11-12 | 哈尔滨工程大学 | Torsional non-inertial vector hydrophone |
-
2006
- 2006-12-14 CN CN 200620172380 patent/CN200983671Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431875A (en) * | 2013-09-13 | 2013-12-11 | 于一 | Method and device for increasing linearity of hydrophone |
| CN103431875B (en) * | 2013-09-13 | 2014-12-31 | 于一 | Method and device for increasing linearity of hydrophone |
| CN106124041A (en) * | 2016-07-28 | 2016-11-16 | 北京中智永科技发展有限公司 | A kind of hydrophone of band amplifying circuit |
| CN106706108A (en) * | 2017-03-10 | 2017-05-24 | 中北大学 | MEMS (micro-electromechanical system) co-vibration type spherical vibrator vector hydrophone based on piezoelectric effect |
| CN107063438A (en) * | 2017-03-10 | 2017-08-18 | 中北大学 | MEMS three-dimensional co-vibrating type vector hydrophones based on piezo-electric effect |
| CN113639852A (en) * | 2021-07-20 | 2021-11-12 | 哈尔滨工程大学 | Torsional non-inertial vector hydrophone |
| CN113639852B (en) * | 2021-07-20 | 2024-01-02 | 哈尔滨工程大学 | Torsion type non-inertial vector hydrophone |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071128 |
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| EXPY | Termination of patent right or utility model |