CN112345059B - Hydrophone based on 3D prints - Google Patents
Hydrophone based on 3D prints Download PDFInfo
- Publication number
- CN112345059B CN112345059B CN202011309512.8A CN202011309512A CN112345059B CN 112345059 B CN112345059 B CN 112345059B CN 202011309512 A CN202011309512 A CN 202011309512A CN 112345059 B CN112345059 B CN 112345059B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic shielding
- shielding shell
- printing
- electret sheet
- hydrophone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010146 3D printing Methods 0.000 claims abstract description 17
- 239000011241 protective layer Substances 0.000 claims abstract description 14
- 239000012815 thermoplastic material Substances 0.000 claims abstract description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses a hydrophone based on 3D printing, which comprises an electromagnetic shielding shell, wherein a containing cavity is formed in the shell, and openings are formed in two axial sides of the shell; a protective layer filled in the accommodating chamber; the piezoelectric electret sheet covered on the upper side of the protective layer is integrally formed by 3D printing of a thermoplastic material, an air cavity for the electric dipole action of the piezoelectric electret sheet is formed inside the piezoelectric electret sheet, contact electrodes are attached to two sides of the piezoelectric electret sheet, the contact electrodes on the lower side are tightly contacted with the protective layer, and the contact electrodes on the upper side are tightly contacted with a backing body; an end cover for closing the opening at one side of the electromagnetic shielding shell, wherein a wire arranging hole is arranged on the end cover; the pre-amplifier circuit board is supported on the back lining body, is electrically connected with the upper side electrode through one lead wire, and is electrically connected with a cable positioned outside the hydrophone through the other lead wire passing through the wire arrangement hole; a waterproof support body is filled between the end cover and the pre-amplifier circuit board so as to seal the wire arranging holes.
Description
Technical Field
The invention relates to the technical field of sonar auxiliary equipment, in particular to a hydrophone based on 3D printing.
Background
A piezoelectric material is a material that is subjected to a mechanical force to induce an electric charge on its surface. The polypropylene hole type ferroelectric electret film is a novel piezoelectric material, and the film not only has the characteristics of ferroelectric polymers, but also has good piezoelectric performance. The polypropylene hole type ferroelectric electret film not only has good thermal stability, but also has good mechanical strength (fatigue resistance), can form films in a large area, has low cost, low dielectric constant, low acoustic impedance matched with air and water and other outstanding characteristics, so that the ferroelectric electret has wide application prospects in the fields of communication, noise control, nondestructive detection, medical treatment, security electroacoustic equipment, military and the like.
3D printing, also known as additive manufacturing, can directly create a three-dimensional model by controlling the selective build-up of material. Fused deposition modeling (fused deposition modeling, FDM) processes extrude fuses of filamentary, thermoplastic material from a spray head by heating, and selectively print the material on a platen according to a predetermined trajectory of a model slice. The FDM type 3D printer has the advantages of being capable of rapidly manufacturing design models and the like due to the relatively low price.
The hydrophone is used as an underwater sensor, can convert acoustic signals generated by underwater pressure change into electrical signals for subsequent processing, and further can obtain real and reliable change conditions of an underwater sound field through analysis, and plays an important role in marine environment detection.
The conventional hydrophone has the problems of high manufacturing cost, complex structure, high assembly difficulty, low sensitivity and the like.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the hydrophone based on 3D printing, which has a simple structure and higher sensitivity.
To this end, the invention provides a hydrophone based on 3D printing, comprising:
An electromagnetic shielding shell axially extends, a first opening is formed in the bottom end face of the electromagnetic shielding shell, a second opening is formed in the top end face of the electromagnetic shielding shell, and a containing cavity is formed in the electromagnetic shielding shell;
The protective layer is a polymer with watertight function and sound transmission function, is filled in the accommodating cavity and seals the first opening;
The piezoelectric electret sheet is integrally formed by D printing of thermoplastic materials, an air cavity for the electric dipole action of the piezoelectric electret sheet is formed inside the piezoelectric electret sheet, the piezoelectric electret sheet is arranged in the accommodating cavity and covers the upper side of the protective layer, contact electrodes are attached to the upper side and the lower side of the piezoelectric electret sheet, the contact electrodes on the lower side are in close contact with the protective layer, and the contact electrodes on the upper side are in abutting contact with a backing body;
the end cover is fixedly arranged on the electromagnetic shielding shell and seals the second opening, and a wire arrangement hole is formed in the end cover;
The front-end amplifier circuit board is arranged in the accommodating cavity and supported on the backing body, is electrically connected with the upper side electrode through one lead wire and is electrically connected with a cable positioned outside the hydrophone through the other lead wire and penetrating through the wire arrangement hole;
A waterproof support body is filled between the end cover and the pre-amplifier circuit board, and at least part of the support body is provided with a closed wire arrangement hole.
In the above technical solution, preferably, a sealing structure is provided between the end cover and the inner peripheral wall of the electromagnetic shielding shell.
In the above technical solution, preferably, the end cover has a connecting portion extending in an axial direction and sealing-connected with an inner peripheral wall of the electromagnetic shielding housing, a circumferential sealing groove is provided on an outer peripheral wall of the connecting portion, and an O-ring is embedded in the sealing groove.
In the above technical solution, preferably, the electromagnetic shielding shell is made of a metal material.
In the above technical solution, preferably, the metal material includes aluminum, copper or steel.
In the above technical solution, preferably, the thermoplastic material is a polypropylene material.
In the above technical solution, preferably, the backing body is made of nylon and is preset with a wire slot penetrating through it.
In the above technical solution, preferably, the pre-amplifier circuit board is an electronic circuit composed of a pre-amplifier, a high-pass filter and a differential amplifier.
Compared with the prior art, the invention has the following advantages:
1. the piezoelectric electret sheet is integrally formed by 3D printing of thermoplastic materials, an air cavity for the electric dipole action of the piezoelectric electret sheet is formed inside, water wave vibration can be detected better, and the pre-amplifier circuit board is utilized to amplify electric signals, so that the signal receiving sensitivity of the hydrophone is greatly improved;
2. the device has the advantages of small volume, light weight, simple structure, low manufacturing cost, easy assembly and more reliable performance.
Drawings
FIG. 1 is a schematic diagram of the structure of a hydrophone based on 3D printing of the present invention;
Wherein the reference numerals are as follows:
100-hydrophone based 3D printing;
1-an electromagnetic shielding housing; 11-a first opening; 12-a second opening;
2-a protective layer;
3-a piezoelectric electret sheet;
4-contact electrodes;
5-backing body;
6-end caps; 61-a wire arrangement hole;
7-a preamplifier circuit board;
8-a support;
9-lead wire.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
The terms of upper, lower, axial, circumferential, inner, outer, etc. in this specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed accordingly depending on the location and use state of the device. These and other directional terms should not be construed as limiting terms.
As shown in fig. 1, a hydrophone 100 based on 3D printing comprises an electromagnetic shielding housing 1, a protective layer 2, a piezoelectric electret sheet 3, a contact electrode 4, a backing body 5, an end cap 6, a preamplifier circuit board 7 and a support body 8.
The electromagnetic shielding shell 1 is made of metal materials, can be aluminum, copper or steel and the like, and is used for electromagnetic shielding and packaging of components in the hydrophone. Which extends in axial direction and has a first opening 11 in its bottom end face and a second opening 12 in its top end face, and is internally configured with a receiving cavity.
The protective layer 2 is a polymer having a watertight function and an acoustically transparent function, is filled in the accommodation chamber and closes the first opening 11.
The piezoelectric electret sheet 3 is arranged in the accommodating cavity and covers the upper side of the protective layer 2, contact electrodes 4 are attached to the upper side and the lower side of the piezoelectric electret sheet 3, the contact electrodes 4 on the lower side are in close contact with the protective layer 2, and the contact electrodes 4 on the upper side are in close contact with a backing body 5. In this example, the piezoelectric electret sheet 3 is integrally formed by 3D printing of thermoplastic material, such as Polypropylene (PLA), and an air cavity for the electric dipole of the piezoelectric electret sheet 3 is formed inside, so that water wave vibration can be better detected, and vibration signals of sound can be transmitted to the piezoelectric electret sheet 3. Furthermore, the contact electrode 4 is manufactured according to the following process steps: the copper sheet was cut into a round shape, glued to the piezoelectric electret sheet with high strength epoxy, and a direct voltage with an amplitude of 2.5 kv was used to apply a charge directly to the contact electrode within 10 seconds. The backing body 5 is made of nylon and is pre-provided with lead grooves through it to avoid back reflections of the active elements and to interfere with the received signal from the hydrophone.
The end cover 6 is fixedly arranged on the electromagnetic shielding shell and seals the second opening 12, and the end cover 6 is provided with a wire arrangement hole 61. Specifically, a sealing structure (not shown) is provided between the end cap 6 and the inner peripheral wall of the electromagnetic shield case 1. The end cap 6 has a connecting portion extending in the axial direction and sealing-connected to the inner peripheral wall of the electromagnetic shield case 1, and a circumferential seal groove is provided in the outer peripheral wall of the connecting portion, and an O-ring is fitted in the seal groove.
The preamplifier circuit board 7 is an electronic circuit composed of a preamplifier, a high-pass filter, and a differential amplifier, and is capable of amplifying and outputting an electric signal from the piezoelectric electret sheet 3. The preamplifier circuit board 7 is disposed in the housing chamber and supported on the backing body 5, and the preamplifier circuit board 7 is electrically connected to the upper side electrode 4 via one lead 9, and electrically connected to a cable (not shown) located outside the hydrophone via the other lead 9 through the wire arrangement hole 61.
A waterproof support body 8 is filled between the end cover 6 and the pre-amplifier circuit board 7, and the support body 8 at least partially seals the wire arrangement hole 61.
The working principle of the hydrophone of the invention is as follows:
The external wave vibration signal with certain sound intensity is transmitted to the piezoelectric electret sheet 4, the piezoelectric electret sheet 4 senses the pressure signal on the end face of the piezoelectric electret sheet and outputs an electric signal, the output electric signal is output to the electronic pre-amplification circuit board 6 through a lead 9 connected between the contact electrode 3 and the electronic pre-amplification circuit board 6, the electric signal is amplified, and then the electric signal is output to an external cable through the lead 9 connected to the pre-amplification circuit board 6 and extending towards the direction of the end cover 8.
The technical scope of the present application is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present application, and these changes and modifications should be included in the scope of the present application.
Claims (5)
1. A hydrophone based on 3D printing, comprising:
The electromagnetic shielding shell (1) extends along the axial direction, a first opening (11) is formed in the bottom end face of the electromagnetic shielding shell, a second opening (12) is formed in the top end face of the electromagnetic shielding shell, and a containing cavity is formed in the electromagnetic shielding shell;
a protective layer (2) which is a polymer with watertight function and sound-transmitting function, is filled in the accommodating cavity and seals the first opening (11); it is characterized in that the utility model also comprises,
The piezoelectric electret sheet (3) is integrally formed by 3D printing of thermoplastic materials, an air cavity for the electric dipole action of the piezoelectric electret sheet (3) is formed inside, the piezoelectric electret sheet (3) is arranged in the accommodating cavity and covers the upper side of the protective layer (2), contact electrodes (4) are attached to the upper side and the lower side of the piezoelectric electret sheet (3), the contact electrodes (4) on the lower side are tightly contacted with the protective layer (2), and the contact electrodes (4) on the upper side are tightly contacted with a backing body (5);
An end cover (6) fixedly arranged on the electromagnetic shielding shell and sealing the second opening (12), wherein a wire arrangement hole (61) is arranged on the end cover (6); a sealing structure is arranged between the end cover (6) and the inner peripheral wall of the electromagnetic shielding shell (1); the end cover (6) is provided with a connecting part which extends along the axial direction and is in sealing connection with the inner peripheral wall of the electromagnetic shielding shell (1), the outer peripheral wall of the connecting part is provided with a circumferential sealing groove, and an O-shaped sealing ring is embedded in the sealing groove; the electromagnetic shielding shell (1) is made of a metal material;
A pre-amplifier circuit board (7) capable of amplifying and outputting an electric signal from the piezoelectric electret sheet (3), the pre-amplifier circuit board (7) being disposed in the accommodating chamber and supported on the backing body (5), the pre-amplifier circuit board (7) being electrically connected to the contact electrode (4) on the upper side through a lead wire (9), and being electrically connected to a cable located outside the hydrophone through the wire arrangement hole (61) through another lead wire (9);
Waterproof supporting bodies (8) are filled between the end covers (6) and the preamplifier circuit board (7), and the supporting bodies (8) at least partially seal the wire arrangement holes (61).
2. The 3D printing-based hydrophone of claim 1, wherein: the metallic material includes aluminum, copper or steel.
3. The 3D printing-based hydrophone of claim 1, wherein: the thermoplastic material is a polypropylene material.
4. The 3D printing-based hydrophone of claim 1, wherein: the back lining body (5) is made of nylon and is provided with a wire guide groove penetrating through the back lining body.
5. The 3D printing-based hydrophone of claim 1, wherein: the pre-amplifier circuit board (7) is an electronic circuit composed of a pre-amplifier, a high-pass filter and a differential amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309512.8A CN112345059B (en) | 2020-11-20 | 2020-11-20 | Hydrophone based on 3D prints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011309512.8A CN112345059B (en) | 2020-11-20 | 2020-11-20 | Hydrophone based on 3D prints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112345059A CN112345059A (en) | 2021-02-09 |
| CN112345059B true CN112345059B (en) | 2024-05-28 |
Family
ID=74364510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011309512.8A Active CN112345059B (en) | 2020-11-20 | 2020-11-20 | Hydrophone based on 3D prints |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112345059B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114689166B (en) * | 2022-03-23 | 2023-04-14 | 西安交通大学 | Piezoresistive ion polymer hydrophone structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010090269A (en) * | 2000-03-24 | 2001-10-18 | 최동환 | Piezoelectric hydrophone |
| CN110207806A (en) * | 2019-07-10 | 2019-09-06 | 国网上海市电力公司 | A kind of oblique angle end face optical fibre vibration sensor and its method of measurement vibration |
| CN111537057A (en) * | 2020-03-26 | 2020-08-14 | 中国船舶重工集团公司第七一五研究所 | 70 MPa-resistant standard hydrophone and manufacturing method thereof |
| CN213274557U (en) * | 2020-11-20 | 2021-05-25 | 江苏海洋大学 | Hydrophone based on 3D prints |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11579011B2 (en) * | 2016-02-19 | 2023-02-14 | Fujifilm Sonosite, Inc. | Membrane hydrophone for high frequency ultrasound and method of manufacture |
-
2020
- 2020-11-20 CN CN202011309512.8A patent/CN112345059B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010090269A (en) * | 2000-03-24 | 2001-10-18 | 최동환 | Piezoelectric hydrophone |
| CN110207806A (en) * | 2019-07-10 | 2019-09-06 | 国网上海市电力公司 | A kind of oblique angle end face optical fibre vibration sensor and its method of measurement vibration |
| CN111537057A (en) * | 2020-03-26 | 2020-08-14 | 中国船舶重工集团公司第七一五研究所 | 70 MPa-resistant standard hydrophone and manufacturing method thereof |
| CN213274557U (en) * | 2020-11-20 | 2021-05-25 | 江苏海洋大学 | Hydrophone based on 3D prints |
Non-Patent Citations (1)
| Title |
|---|
| 灵敏度可调式压电薄膜水听器;王丽坤, 李光, 王光灿;应用声学;20030330(02);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112345059A (en) | 2021-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213274557U (en) | Hydrophone based on 3D prints | |
| US4733379A (en) | Line array transducer assembly | |
| US5646470A (en) | Acoustic transducer | |
| US5545942A (en) | Method and apparatus for dissipating heat from a transducer element array of an ultrasound probe | |
| US7545082B2 (en) | Ultrasonic sensor device and ultrasonic transducer | |
| US4866683A (en) | Integrated acoustic receiver or projector | |
| CN112345059B (en) | Hydrophone based on 3D prints | |
| US20170031040A1 (en) | Hermetically sealed hydrophones with very low acceleration sensitivity | |
| US20160279749A1 (en) | Method of manufacturing a low density underwater accelerometer | |
| US5394379A (en) | Hydrophone | |
| JPS61204560A (en) | Underwater transducer | |
| US3018466A (en) | Compensated hydrophone | |
| US5363344A (en) | Acoustic sensor having a shell-mounted transducer | |
| EP0201421A1 (en) | Contact microphone pick-up with a piezo-polymeric membrane | |
| GB1350213A (en) | Electroacoustic transducers | |
| CN115752702A (en) | Low-noise vector hydrophone | |
| EP3232232B1 (en) | Hermetically sealed hydrophones with very low acceleration sensitivity | |
| KR100337775B1 (en) | Piezoelectric hydrophone | |
| US20110242943A1 (en) | Hydrophone and Hydrophone Assembly for Performing Stereophonic Underwater Sound Recordings | |
| CN201820440U (en) | Energy transducer of fish finder | |
| CN117412218B (en) | Hydrophone and manufacturing process | |
| WO2024113493A1 (en) | Low-noise vector hydrophone | |
| RU2754604C1 (en) | Sonar equipment of autonomous uninhabited underwater vehicle | |
| KR101654888B1 (en) | Ultrasound transducer | |
| JP2013046409A (en) | Ultrasonic sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |