AU2020102915A4 - A cascaded piezoelectric underwater transducer - Google Patents
A cascaded piezoelectric underwater transducer Download PDFInfo
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- AU2020102915A4 AU2020102915A4 AU2020102915A AU2020102915A AU2020102915A4 AU 2020102915 A4 AU2020102915 A4 AU 2020102915A4 AU 2020102915 A AU2020102915 A AU 2020102915A AU 2020102915 A AU2020102915 A AU 2020102915A AU 2020102915 A4 AU2020102915 A4 AU 2020102915A4
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- cascaded
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- underwater
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- 238000005452 bending Methods 0.000 claims abstract description 30
- 239000000919 ceramic Substances 0.000 claims description 15
- 230000010287 polarization Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/121—Flextensional transducers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
- G10K9/125—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means with a plurality of active elements
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2200/00—Details of methods or devices for transmitting, conducting or directing sound in general
- G10K2200/11—Underwater, e.g. transducers for generating acoustic waves underwater
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention provides a cascaded piezoelectric underwater transducer, which comprises
a radiating head, cascaded segments, an additional weight housing, prestressed bolts and an
output cable. The radiating head and the additional weight housing are assembled at both ends
of the transducer, and a certain number of cascaded segments are connected in series in the
middle, and the number of multi-segments can be adjusted according to the application. Each
cascaded segment includes 2 columns of piezoelectric stacks, fastened to the bending disks
alongside each other by prestressed bolts. The additional weight housing has the functions of
watertightness and additional weight at the end of transducer. The output cable connects the
leads of piezoelectric stacks to the external driving source, passing through the additional
weight housing. On the premise of ensuring the small transverse size of the transducer, the
invention makes full use of the longitudinal space, and utilizes the reasonable coupling of the
longitudinal vibration of the piezoelectric stacks and the flexural vibration of the bending disks
to achieve a low frequency, small size and light weight transducer. The transducer can work
effectively in the 200Hz-5OkHz frequency range. The transducer proposed in this invention
also has the advantages of simple structure, convenient manufacture, low cost, and stable
performance. This type of transducer can be widely used in underwater detection, underwater
communication, etc., it is especially suitable for underwater operations on the various
underwater vehicles. It is also suitable for arrangement in all kinds of SONAR equipment to
achieve special acoustic performances.
-1/4
Figure 1
Description
-1/4
Figure 1
PATENTS ACT 1990
A cascaded piezoelectric underwater transducer
The invention is described in the following statement:-
A cascaded piezoelectric underwater transducer
The invention relates to an underwater transducer, in particular to a cascaded
piezoelectric underwater transducer. It belongs to the field of electroacoustic sensor, which
is used to efficiently realize the conversion of electroacoustic energy, and it is suitable for
underwater detection, communication and other underwater acoustic applications.
As an indispensable key component of underwater acoustic equipment, underwater
transducer plays an extremely important role in underwater weapons, equipment defence
detection and commercial application. The qualities of the device performances affect the
function of the whole system directly. With the increasing requirements of modem
underwater acoustic applications, the low frequency, small size and light weight of
underwater transducer have become the important trend in its development. Currently, the
widely used low-frequency transducers include various types of flextensional transducers,
flexural transducers, free-flooded ring transducers and giant magnetostrictive low
frequency underwater transducers.
In the open document "Basicproblems caused by depth and size constraints in low
frequency underwater transducers" (Journalof the acoustic society of America, United
States, volume 68, issue 4, 1980, 1031-1037), the limiting relationship between the size of
underwater transducer and its acoustic performance was discussed in detail. In the paper
"The design of low frequency underwater acoustic projectors:present status andfuture
trends" (IEEE Journal of oceanic engineering, United States, Volume 16, issue 1, 1991,
107-122), several commonly used types of low frequency projectors were summarized,
which mainly include flextensional transducer based on flexural vibration mode, and free
flooded ring transducer based on the theory of Helmholtz resonator. In the literature "Thin,
lightweight electroacousticprojectorforlowfrequency underwaterapplications"(Journal
ofthe Acoustical Society ofAmerica, UnitedStates, Volume 116, Issue 3, 2004, 1536-1543),
a lightweight cymbal low frequency underwater transducer with the size of (381x280x64)
mm and the weight of 26 N in water was proposed. It can transmit acoustical energy in the
3-15 kHz frequency range effectively.
In recent years, certain progress has been made in small size low frequency
transducers in China. In the document "Design of a small-size low-frequency broadband
sound source transducer"(Acoustic Technology, Vol. 32, No. 6, 2013, 285-286), a bending
disk transducer based on the symmetrical double lamination is introduced. Its size is
(p200x30mm, its mass does not exceed 3 kg, and it can work in the 260-2450Hz frequency
range. The patent "A small size and large amplitude helical spring low-frequency
transducer" (Publication number CN 107509149 A) introduced a helical spring transducer,
which realized the characteristics of low frequency, small size and large displacement. The
patent "A low-frequency underwater transducer based on fold-back structure "
(Publication No. CN 102136268 A) introduced a fold-back structure piezoelectric
transducer, which realized the characteristics of low frequency, light weight and small size.
The patent "A kind ofultra-smalllow-frequency emission transducer" (Publication No. CN
109935223 A) introduced a low frequency projector composed of several strip-shaped vibration segments, which had a small size and high source level. It can achieve the low frequency resonance of 500 Hz, the source level of more than 185 dB, and the weight of about 10 kg.
Based on the existing research results of small size and low frequency transducers,
most of them adopt, to some extent, the flexural vibration modes of the whole structure or
components of the transducers, so as to realize the light weight of low frequency
transducers. However, for the practical application, we still need smaller size and lighter
weight low frequency transducers. The cascaded piezoelectric underwater transducer of
proposed in this invention can obviously reduce the size and weight of the transducer while
maintaining the low frequency characteristics of the transducer, and optimize its
electroacoustic performance. Thereby it can satisfy the special requirements in practical
applications.
The invention provides an underwater transducer. This kind of transducer reasonably
couples the longitudinal vibration of the structure and the flexural vibration of the bending
disks, which makes full use of the space of the transducer, and realizes the characteristics
of low frequency, light weight and small size of the underwater transducer by flexible
cascaded connection. The transducer has the advantages of simple structure, convenient
manufacture, low cost and stable performance. It can be widely used in underwater
detection, underwater acoustic communication and other fields, which is especially suitable
to fit various underwater vehicles for underwater operations. It is also suitable for
arrangement in all kinds of SONAR equipment to achieve special acoustic performances.
In order to realize the above functional requirements and solve the related technical
problems, the technical scheme of the invention is as follows: the transducer is connected
in series with the radiating head, a certain number of cascaded segments, and the additional
weight housing. More specific invention contents are as follows:
The cascaded segments of this type transducer are flexible, and the number is
generally from 3 to 15. All the cascaded segments are connected in series one by one into
a whole cascaded section, and the two ends of the cascaded section are respectively glued
to the radiating head and the additional weight housing. Generally, all the cascaded
segments have the same structure, and each cascaded segment is composed of the
piezoelectric stacks and a bending disk. In every cascaded segment, there are 2
piezoelectric stacks, which are arranged side by side along a certain diameter direction of
the bending disk. Both the piezoelectric stacks are tightly connected to the bending disk by
prestressed bolts. The adjacent segments are connected to both sides of the bending disk.
What needs to be ensured is that when one side of the bending disk is connected to the two
groups of piezoelectric stacks of the cascaded segment along a certain diameter direction,
the other side needs to be connected along the orthogonal direction. The cascaded section
will be formed through the connection one by one in series of all the cascade segments.
The advantage of such a structure is that the flexural vibration mode of the bending disk
will be fully utilized to obtain the maximum longitudinal vibration displacement of the
radiating head of the transducer, and the acoustical energy will be transmitted out easily.
The thickness of the bending disk is relatively thin, and it can be optimized by holing. The
specific design is based on the required performances of transducer. The thickness of
bending disk is generally in the range of 5 to 10 mm.
For the piezoelectric stacks of each cascaded segment, conductive adhesive should be
used to glue the piezoelectric ceramic plates with holes in the centrality into a stack. The
number of piezoelectric ceramic plates is generally an even number, such as four or six.
The polarization directions of two adjacent piezoelectric ceramic plates are opposite, and
the adhesive surface has electrode to lead out. The identical electrodes of each piezoelectric
stack are electrically connected in parallel, and two taps are drawn out according to the two
poles of the polarization. There is an insulating shim at each end of the piezoelectric stack.
The piezoelectric stack is applied with appropriate prestress by prestressed bolts and
connected to the bending disks.
In order to increase the acoustic radiation area of the transducer, the radiating head is
generally designed as a horn structure, or a truncated cone type, or an exponential
generating line type. The material is generally light metal such as duralumin. The additional
weight housing is generally made of heavy metals such as steel. Such a design can enlarge
the vibration velocity ratio of head to tail, which is beneficial to the forward radiation of
acoustical energy. The additional weight housing is composed of a waterproof housing and
a tail mass. The front end of the waterproof housing and the radiating head are sealed with
O-rings, and the rear end of the waterproof housing and the tail mass are also sealed with
O-rings. The bolt and epoxy adhesive are used for tight gluing, so as to ensure the water
tightness of the transducer and realize the functional requirements of large weight at the
tail of the transducer.
In addition, all piezoelectric ceramic plates of the transducer are electrically connected
in parallel. According to the polarization direction of the piezoelectric ceramic plates, the
positive electrodes are connected into one lead, the negative electrodes are connected into another lead, and the leads are connected to the external driving source.
The above-described cascaded piezoelectric underwater transducer reasonably
couples the longitudinal vibration of the structure and the flexural vibration of the bending
disks. It can realize the low frequency characteristics of the transducer in a small space,
especially in a small traverse section size. The beneficial effects of the proposed invention
are as follows: the transducer has remarkable characteristics of low frequency, small size
and light weight. It can work effectively in 200 Hz-50 kHz frequency range. So it is a high
power projector. This kind of cascaded piezoelectric underwater projector has the
advantages of simple structure, convenient manufacture, low cost and stable performance.
It is a light and small underwater projector with excellent performances, which provides
the possibility for the arrangement of low frequency array in various SONAR equipment.
The cascaded piezoelectric underwater transducer of the proposed invention is further
described in combination with the attached drawings and the implementation mode.
Fig. 1 is the schematic structural diagram of the cascaded piezoelectric underwater
transducer according to the proposed invention.
Fig. 2 is the schematic diagram of the structure of cascaded segment of the transducer
involved in the proposed invention.
Fig.3 is the schematic diagram of the connection relationship between the additional
weight housing of the transducer and the piezoelectric stacks according to the proposed invention.
Fig. 4 is the schematic diagram of the piezoelectric stack involved in the proposed
invention.
1. Radiating head; 2. O-ring 3. Cascaded segment; 4. Bending disk; 5. Insulating shim;
6. Electrode plate; 7. Piezoelectric ceramic plate; 8. Waterproof housing; 9. Tail mass; 10.
Output cable; 11. additional weight housing; 12. Prestressed bolt; 13. Spring shim; 14.
Insulating sleeve; 15. Piezoelectric stack; 16. Fastening bolt; 17. Electrode connection wire.
The invention relates to a cascaded piezoelectric underwater transducer, which
comprises a radiating head 1, multiple cascaded segment 3, an additional weight housing
11, O-rings 2, an output cable 10, etc. The additional weight housing 11 includes a
waterproof housing 8, a tail mass 9 and fastening bolts 16; the cascaded segment 3 includes
a bending disk 4, piezoelectric stacks 15, a spring shim 13 and prestressed bolts 12; the
piezoelectric stack 15 includes insulating shims 5, electrode plates 6, piezoelectric ceramic
plates 7, an insulating sleeve 14 and electrode connection wires 17.
As shown in Fig. 1, the radiating head1 of the cascaded piezoelectric underwater
transducer according to the proposed invention, can be a horn structure, or a truncated cone
type, or an exponential generating line type. The horn end of the radiating head 1 is outward,
and its larger surface is conducive to the outward radiation of acoustical energy. The throat
of the radiating head 1 is provided with a sealing ring groove for installing the O-ring 2.
The O-ring 2 is closely matched with the waterproof housing 8 to form a watertight
structure. The throat of the radiating head 1 is closely connected with the cascaded
segments 3 by the prestressed bolts 12.
There are several cascaded segments 3. The number from 3 to 15 is appropriate. These
cascaded segments are connected in series with each other by prestressed bolts 12. The
cascaded segment 3 consists of two groups of piezoelectric stacks 15 and a bending disk 4.
On the one side of the bending disk 4, two groups of piezoelectric stacks 15 are fixed along
a certain diameter direction by prestressed bolts 12, while on the other side of the bending
disk, two groups of piezoelectric stacks 15 are fixed along the orthogonal direction by the
prestressed bolts 12. Such an assembling shown in Fig. 2 ensures the staggered series
connection of each cascaded segment. In order to make full use of the flexural vibration
mode of the bending disks 4, the thickness of the bending disk 4 is generally in the range
of 5 to 10 mm.
After all the cascaded segments 3 are connected in series, their tails are connected
with the additional weight housing 11 by the prestressed bolts 12. The waterproof housing
8 is connected to the tail mass 9 by four fastening bolts 16, and an O-ring 2 is used for
watertight treatment between the waterproof housing 8 and the tail mass 9. Such an
assembling is shown in Fig. 3. The output cable 10 is connected to the electrode connection
wires 17 of all the piezoelectric reactors 15, passing through the additional weight housing
11.
The piezoelectric stack 15 is composed of piezoelectric ceramic plates 7 with holes in
the centrality. The polarization direction of the adjacent piezoelectric ceramic plates is opposite. The electrode plates 6 are glued between them and insulating shims 5 are glued at both ends of the piezoelectric stack 15. All piezoelectric stacks 15 are glued by conductive adhesive. They are respectively connected to the bending disks 4, the radiating head 1 or the tail mass 9 by the prestressed bolts 12 sleeved with insulating sleeve 14. Two electrode connection wires 17 are led out from the piezoelectric stacks 15 according to the polarization direction of the piezoelectric ceramic plates 7, which are connected with the output cable 10.
The specific assembly process of the cascaded piezoelectric underwater transducer is
as follows:
(1) The insulating shim 5, electrode plate 6 and piezoelectric ceramic plate 7 are glued
in sequence by conductive adhesive.
(2) According to the structure shown in Fig. 2, the two groups of piezoelectric stacks
completed in step (1) are connected with the bending disk 4 by prestressed bolts 12 to
complete the cascaded segment 3.
(3) According to the structure shown in Fig. 1, the cascaded segment 3 completed in
step (2) are fasten to the radiating head 1 with prestressed bolts 12. This is how to realize
the connection between the first-layer cascaded section and the radiating head 1. It should
be noted that the appropriate prestress should be applied when tightening with prestressed
bolts 12.
(4) The piezoelectric stack 15 is completed by the same of step (1), and the cascaded
segment 3 is completed as same as step (2), and the completed cascaded segment 3 is
fastened to the position of the upper layer cascaded section in order to realize the series connection structure of several cascaded section. The sketch is shown in Fig. 1.
(5) Fastening the last layer cascaded section to the tail mass 9 by the prestressed bolts
12.
(6) Electrode connection wires 17 of piezoelectric stacks 15 should be welded, and all
piezoelectric stacks are electrically connected in parallel according to the polarization
direction of piezoelectric ceramic plates 7.
(7) Passing the output cable 10 which is connected to the electrode connection wires
17 completed in step (6) through the corresponding hole of the waterproof housing 8 and
the tail mass 9.
(8) Fastening the waterproof housing 8 to the tail mass 9 by the fastening bolts 16,
and completing the watertight fit of the waterproof housing 8 by the O-rings of the radiating
head 1 and the tail mass block 9.
The transducer can realize the function of transmitting and receiving underwater
acoustical waves. It has the characteristics of low frequency, high power, small size and
light weight. The transducer is a rod-shaped structure with small cross-section. Such a
structure is especially suitable for the assembly of various underwater carriers, especially
for the arrangement in various SONAR equipment, thus it has excellent acoustic
performances in underwater detection, underwater acoustic communication and other
fields.
Claims (7)
1. The cascaded piezoelectric underwater transducer, which comprises a radiating
head, multiple cascaded segments, an additional weight housing, prestressed bolts and an
output cable. The radiating head and the additional weight housing are provided at both
ends of the transducer, and several cascaded segments are connected in series in the middle,
and the number of cascaded segments can be adjusted according to the application. Each
cascaded section is arranged in parallel by two groups of piezoelectric stacks, and it is glued
tightly by prestressed bolts and bending disks. The output cable connects the leads of
piezoelectric stacks to the external driving source, passing through the additional weight
housing.
2. Based on the cascaded piezoelectric underwater transducer according to claim 1,
its characteristics are that the radiating head, multiple cascaded segments, and the
additional weight housing are connected in series in the transducer.
3. Based on the cascaded piezoelectric underwater transducer according to claim 1
and claim 2, it is characterized in that: all the cascaded sections have the same structure,
and they are connected in series one by one. The number of cascades section is not fixed,
which can be flexibly adjusted to optimize the performances of the transducer.
4. Based on the cascaded piezoelectric underwater transducer according to claim and
claim 3, it is characterized in that: each cascaded segment is composed of two groups
piezoelectric stacks and a bending disk. The two groups piezoelectric stacks are arranged
side by side, which are tightly connected with the bending disk by prestressed bolts. Each
group of piezoelectric stacks is consisted of an even number of piezoelectric ceramic plates, that are electrically connected in parallel and mechanically connected in series according to the positive and negative polarization directions.
5. Based on the cascaded piezoelectric underwater transducer according to claims and
claim 4, it is characterized in that: the transducer adopts the disk type bending beam,
namely the bending disk. The bending disk is connected with the piezoelectric stacks in
two orthogonal diameter directions. Its one side is connected with two groups of
piezoelectric stacks of a cascaded segment, and its other side (i.e., the back side of the
bending disk) is connected with two groups of piezoelectric stacks of adjacent cascaded
segment. The above assembling will realize the series connection of the multiple cascaded
sections of claim 3.
6. Based on the cascaded piezoelectric underwater transducer according to claim, it
is characterized in that: all piezoelectric ceramic plates of the transducer are electrically
connected in parallel. According to the polarization direction of piezoelectric ceramic
plates, the positive electrodes are connected into one lead, and the negative electrodes are
connected into another lead, which are connected to the external driving source by leads.
7. Based on the cascaded piezoelectric underwater transducer according to claim and
claim 2, it is characterized in that: both the additional weight housing and the horn-type
radiating head are watertight by O-ring. The additional weight housing not only satisfies
the functional requirements of the large weight at the tail of the transducer, but also plays
a watertight role in the transducer.
Figure 1 -1/4-
-2/4-
Figure 2.
-3/4-
Figure 3
-4/4-
Figure 4
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020102915A AU2020102915A4 (en) | 2020-10-21 | 2020-10-21 | A cascaded piezoelectric underwater transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020102915A AU2020102915A4 (en) | 2020-10-21 | 2020-10-21 | A cascaded piezoelectric underwater transducer |
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| AU2020102915A4 true AU2020102915A4 (en) | 2020-12-17 |
Family
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053342A (en) * | 2021-03-29 | 2021-06-29 | 厦门大学 | Underwater acoustic collimator capable of breaking through diffraction limit |
| CN115024837A (en) * | 2022-06-14 | 2022-09-09 | 成都市萨尼医疗器械有限公司 | Megahertz ultrasonic transducer for root canal therapy and use method thereof |
-
2020
- 2020-10-21 AU AU2020102915A patent/AU2020102915A4/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113053342A (en) * | 2021-03-29 | 2021-06-29 | 厦门大学 | Underwater acoustic collimator capable of breaking through diffraction limit |
| CN113053342B (en) * | 2021-03-29 | 2023-08-18 | 厦门大学 | Underwater acoustic collimator breaking through diffraction limit |
| CN115024837A (en) * | 2022-06-14 | 2022-09-09 | 成都市萨尼医疗器械有限公司 | Megahertz ultrasonic transducer for root canal therapy and use method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) |