close

Вход

Забыли?

вход по аккаунту

?

JP2000224686

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2000224686
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electroacoustic transducer for emitting a sound wave into water, and more particularly to a
cylindrical transmission for arranging a plurality of vibration elements in a cylindrical shape and
emitting a sound wave using a respiratory vibration mode of a cylinder. Related to
[0002]
2. Description of the Related Art Heretofore, in this type of cylindrical wave transmitter, as shown
in, for example, Japanese Utility Model Application Publication No. 5-88094 or Japanese Patent
Application Laid-Open No. 5-14998, in a cylindrical wave transmitter, a respiratory vibration
mode of a cylinder is obtained. Is used for the purpose of efficiently emitting a low frequency
sound wave by lowering the resonance frequency.
[0003]
FIG. 5 is a schematic view showing an example of a conventional cylindrical transmitter.
In a conventional cylindrical wave transmitter, as shown in FIG. 6, a plurality of drive units 14
each having one rectangular piezoelectric ceramic 11 and two connection fittings 12 as one unit
are arranged in a cylindrical shape, and between each drive unit 14 , And bolted together by a
bolt 13. Further, the inner and outer peripheries of the cylindrical shape are watertight treated
04-05-2019
1
with a rubber boot 16 and the oil 15 is provided inside the inner and outer peripheries covered
with the rubber boot 16.
[0004]
Next, the operation of the conventional cylindrical transmitter will be described. When an
electrical signal at the same frequency as the mechanical resonance frequency (fr) generated in
the entire cylindrical shape is applied to the rectangular piezoelectric ceramic 11, mechanical
resonance by the respiratory vibration mode of the cylindrical transmitter is obtained to obtain a
high-efficient acoustic output. Can. The mechanical resonance frequency (fr) can be expressed as
frfrC / 2πd: Formula (1), where C is the speed of sound of the drive unit 14 and d is the average
radius of the cylindrical shape. Therefore, if the average radius d of the cylindrical shape is
sufficiently large, the mechanical resonance frequency can be lowered.
[0005]
SUMMARY OF THE INVENTION The problem with the above-mentioned prior art is that the
cylindrical transmitter is largely inferior in storability. The reason is that when transmitting low
frequencies with high transmission efficiency, it is necessary to increase the diameter and obtain
a low mechanical resonance frequency in the respiratory vibration mode of the cylinder, so that
miniaturization can not be achieved and storageability is poor. was there.
[0006]
Therefore, it is an object of the present invention to provide a cylindrical type wave transmitter
capable of obtaining high transmission driving efficiency by obtaining a low mechanical
resonance frequency in a respiratory vibration mode of a cylinder while having a compact
structure and improving storability. It is to be.
[0007]
SUMMARY OF THE INVENTION The cylindrical wave transmitter of the present invention
comprises a plurality of fan-shaped piezoelectric ceramics arranged alternately on the
circumference, and a hardened material present in a rubber bag with a partition between them.
The two-part curable resin before, and the shape memory rigid ring which is shrunk in the
cylindrical shape, and which changes to a large diameter by heat, and shrunk in the outer
periphery, is large according to the change of the overall shape It consists of a rigid ring that
04-05-2019
2
changes in diameter and a rubber boot that covers the whole, and the shape change force of the
shape memory rigid ring that changes to a large diameter by heat, the curing of the twocomponent curable resin, and the large diameter in accordance with these shape changes. By
means of the action of the rigid ring on the outer periphery which holds the whole from the outer
periphery, it has a means of forming a cylindrical shape and forming a cylindrical transmitter.
[0008]
In the present invention, the two-part curable resin before curing which is present in the rubber
bag having a partition, which constitutes a cylindrical wave transmitter when not in use, exists in
a state of being shrunk inside the cylindrical shape, A shape memory rigid ring which changes to
a large diameter by heat and a rigid ring which exists in a contracted state on the outer periphery
and changes to a large diameter in accordance with the change of the entire shape can be
present in free shapes.
Therefore, in order to transmit waves efficiently, it is possible to compactly accommodate a largediameter cylindrical transmitter having a low mechanical resonance frequency in the respiratory
vibration mode of the cylinder.
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention
will be described in detail with reference to the drawings.
Referring to FIG. 1, the embodiment of the present invention comprises a plurality of fan-shaped
piezoelectric ceramics 1 and a two-part curable resin 3 before curing present in a rubber bag 2
having a plurality of partitions, and a cylinder A shape memory rigid ring 4 which exists in a
state of being shrunk like a spring and which changes to a large diameter by heat, and a state of
being shrunk like a spring on the outer periphery, a large diameter in accordance with the
change of the whole shape And a metal fitting 9 for positioning the shape memory rigid ring 4
and a rubber boot 6 covering the whole. Further, the rubber boot 6 may contain oil which is
insulating and has good acoustic conductivity.
[0010]
04-05-2019
3
In the plurality of piezoelectric ceramics 1, as shown in FIG. 3, the electrodes 10A and 10B of
different polarities are not visible for the electrode 10A due to the relationship of the figure, but
they are on the side of the piezoelectric ceramic 1 and , Is drawn to the inner peripheral side of
the cylindrical shape. The electrodes 10A of the adjacent piezoelectric ceramics 1 shown in FIG. 1
are connected by leads 20A and the electrodes 10B are connected by leads 20B, respectively
having the same polarity, and electrically connected, and the leads 20A and 20B are connected
The terminal has been pulled out of the rubber boot 6.
[0011]
As shown in FIG. 4, the rubber bag 2 having a partition between them is adhered by the adjacent
piezoelectric ceramic 1 and the adhesive layer 50, and the partition of the main agent 31 and the
curing agent 32 constituting the two-component curable resin 3 is The inner and outer diameter
sides of the cylindrical transmitter are bonded and separated by the adhesive layer 40 so as to
connect them. Further, the adhesive force of the adhesive layer 40 is weaker than the tensile
force at the time of shape deformation of the shape memory rigid ring 4, and one of the
compartments of the partitioned bag (for example, the portion where the curing agent 32 exists)
is partitioned The internal pressure is higher than the other room of the bag. The adhesive layer
40 is peeled off, and the main agent 31 and the curing agent 32 constituting the two-component
curable resin 3 are mixed and cured to form a block 8 (FIG. 2). As the main agent 31 and the
curing agent 32 constituting the two-component curable resin 3, there is an Araldite (registered
trademark) adhesive sold by CIBA-GEIGY, and of these, it is possible to use a room temperature
curing type adhesive. it can.
[0012]
The shape memory rigid ring 4 has a large diameter cylindrical shape stored in advance, and
when stored, it exists in a shape that is shrunk like a spring by pre-processing (FIG. 1). Connected
with 7. In addition, the shape memory rigidity ring 4 is made of a material which is electrically
insulated at one place other than the portion contracted like a spring by the pretreatment and
which has the same rigidity as the shape memory rigidity ring 4. The mechanical connection of
the ring 4 is maintained and forms an electrically insulating part.
[0013]
04-05-2019
4
The inside of the lead 21 has a pair wire structure divided into a positive electrode and a
negative electrode, and the positive electrode and the negative electrode are respectively
connected to both ends of the electrically insulating portion of the shape memory rigid ring 4
inside the rubber boot 6 Then, current can be supplied to the shape memory rigid ring 4 through
the lead 21 drawn from the power source 7 to the outside of the rubber boot 6.
[0014]
The rigid ring 5 conforms to the outer diameter of the cylindrical transmitter having a large
diameter cylindrical shape in the fully extended state, and is stored in a state of being contracted
like a spring when stored (FIG. 1) There is.
[0015]
As shown in FIG. 1, the fixtures 9 are attached to each of the piezoelectric ceramics 1 so as to be
orthogonal to the circumference of the cylindrical shape, and fix the shape memory rigid ring 4.
[0016]
Further, FIG. 2 shows an embodiment of the present invention, in which the shape memory rigid
ring 4 is changed to a large diameter and the two-part curable resin 3 is cured to form a block 8
to form a cylindrical transmitter of cylindrical shape. FIG.
The mean radius of the cylindrical transmitter of cylindrical shape is matched to the desired
mechanical resonance frequency.
[0017]
Now, the fan-shaped piezoelectric ceramic 1 used here is a drive unit 14 having a structure in
which one or more rectangular piezoelectric ceramics 11 as shown in FIG. It may be.
[0018]
Next, the operation of the embodiment of the present invention will be described with reference
to the drawings.
04-05-2019
5
Heat is supplied to the shape memory rigid ring 4 by supplying a current from the power supply
7 to the shape memory rigid ring 4 shown in FIG.
The spring causes the shape memory rigid ring 4 to expand to a previously stored large diameter
by heat, and the tensile force due to this deformation pulls the rubber bag 2 with a partition
between the two. Since the adhesive layer 40 (FIG. 4), which is a partition of a certain rubber bag
2, is set to an adhesive force lower than the tensile force due to the deformation of the shape
memory rigid ring 4, the tear is released.
At the time of peeling off, the main agent 31 and the curing agent 32 (FIG. 4) constituting the
two-component mixed resin 3 have high internal pressure (for example, the portion where the
curing agent 32 is present) at one side of the partitioned bag, The mixture is vigorously mixed,
and the two-component mixed resin 3 is cured to form a block 8 (FIG. 2).
[0019]
Due to a series of operations caused by the deformation of the shape memory rigid ring 4, the
rigid ring 5 on the outer periphery is also tensioned, the spring-like shaped part is stretched,
changes into a large diameter, and becomes a large diameter cylindrical shape in an extended
state The cylindrical transmitter is pressed and fixed from the outside. The rubber boot also
changes its shape to match the shape of the cylindrical wave transmitter which changes to a
large diameter by these series of operations.
[0020]
FIG. 2 shows a schematic view of a cylindrical transmitter having a large cylindrical shape after
the series of operations described above have been completed. At this time, an electrical signal
having the same frequency as the mechanical resonance frequency fr (formula 1) of the
cylindrical transmitter is input from each of the leads 20A and 20B. This input electrical signal
vibrates the cylindrical transmitter to emit sound waves.
[0021]
The effect of the present invention is that the large-sized cylindrical transmitter with good
04-05-2019
6
transmission efficiency, which can obtain low mechanical resonance frequency in the respiratory
vibration mode of the cylinder, can be compactly stored when not in use. The storability can be
improved.
[0022]
The reason is that the rubber bag 2 with partitions between it, the two-component mixed resin 3
that exists without being cured in it, and the shape of the large diameter are stored in advance,
and when stored, it shrinks like a spring By using a certain shape memory rigid ring 4 and a rigid
ring 5 which is shrunk like a spring outside the cylindrical shape, it is possible to form a
cylindrical transmitter with a free shape.
04-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
15 Кб
Теги
jp2000224686
1/--страниц
Пожаловаться на содержимое документа