JPH08334558

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 JPH08334558
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
submersible transducer for horizontally expanding a plurality of transducer elements in water.
[0002]
2. Description of the Related Art As a conventional underwater transducer for expanding a
transmitting and receiving element horizontally in water, for example, there is one proposed in
JP-A-1-305383. As shown in FIG. 5, this underwater transducer includes a command circuit 110
that outputs a command signal based on a signal from a base station, a switch 120 that operates
by inputting the command signal, and the switch 120. A gas tank 130 for releasing gas when
activated, a vinyl tube 140 connected to the gas tank 130, a plurality of wave transmitting /
receiving elements 150 attached to the vinyl tube 140, a vinyl tube 140 and a wave transmitting
/ receiving element 150 are accommodated. It consisted of case 160 and so on.
[0003]
In such a conventional underwater transducer, the vinyl tube 140 is compressed and folded
before being dropped into water, and is housed in the case 160. Then, the underwater transducer
in this stored state is dropped from an aircraft or the like into the water.
04-05-2019
1
[0004]
After the underwater transducer is dropped into the water, when a signal from the base station is
input to the command circuit 110, the command circuit 110 outputs a command signal to
operate the switch 120, and the gas tank 130 to the vinyl tube 140 Thus, the vinyl tube 140 was
expanded in the horizontal direction, and the wave transmitting / receiving element 150 was
expanded in water.
[0005]
However, in the above-described conventional underwater transducer, the gas is injected into the
vinyl tube 140 and inflated to expand the transmitting / receiving element 150 in water, so that
it can be used again In this case, after recovering the underwater transducer from the water,
manually degas the vinyl tube 140 and fold the degassed vinyl tube 140 so that it can be easily
deployed, and reuse There was a problem that it took time and effort to maintain the
[0006]
Here, if the gas tank 130 is disposable, it is necessary to replace the emptied gas tank 130 with a
new gas tank filled with gas each time the submersible transducer is reused. In the case where
the gas 130 can be refilled, the gas must be replenished each time the submersible transducer is
reused, and there is a problem that it is expensive as well as labor.
[0007]
Furthermore, in the above-described underwater transducer, in order to maintain the state of the
folded vinyl tube 140 so as to be easily expanded, even after landing on the water, the case 160
for protecting the vinyl tube 140 from the impact upon landing is indispensable. Because of this,
there is also a problem that the entire device becomes large.
[0008]
The present invention has been made in view of the above problems, and it is possible to
efficiently deploy and store transmitting and receiving elements while having a simple
configuration, and to miniaturize the equipment. The purpose is to provide a transducer.
[0009]
SUMMARY OF THE INVENTION In order to achieve the above object, the underwater transducer
according to claim 1 comprises a power supply, a switch connected to the power supply, and a
switch connected to the switch when the temperature is low. A bi-directional shape memory alloy
04-05-2019
2
which is stored in a high temperature state, an insulator covering the bi-directional shape
memory alloy, and a wave transmitting / receiving element attached to the bi-directional shape
memory alloy And a command circuit that outputs a command signal based on an external signal
and operates the switch to bring the bi-directional shape memory alloy to a low temperature or a
high temperature.
[0010]
The underwater transducer according to claim 2 has a configuration in which the two-way shape
memory alloy is in a crimped state which is in a contracted state at a low temperature and in an
extended state at a high temperature, and According to a third aspect of the present invention,
there is provided the underwater transducer, wherein the bi-directional shape memory alloy is in
a coiled state which is in a contracted state at a low temperature and in an expanded state at a
high temperature.
[0011]
In the underwater transducer according to the present invention having the above configuration,
after the underwater transducer is dropped into water, when a signal is transmitted from the
base station, the command circuit receiving this signal turns on the switch. Make it into a state.
[0012]
Then, power is supplied to the bi-directional shape memory alloy, and the bi-directional shape
memory alloy, which has reached a high temperature, is expanded.
As a result, the wave transmitting / receiving element attached to the two-way shape memory
alloy is disposed at a position capable of transmitting / receiving wave.
[0013]
When the underwater transducer is recovered from water, a signal is transmitted from the base
station, and the switch is turned off by the command circuit.
Then, the supply of power to the two-way shape memory alloy is stopped, and the two-way shape
04-05-2019
3
memory alloy, which has become a low temperature, is stored.
After that, when the underwater transducer is recovered from the water and used again, it may
be dropped into the water as it is stored.
[0014]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An underwater transducer
according to an embodiment of the present invention will be described below with reference to
the drawings.
FIG. 1 is a block diagram showing an underwater transducer according to an embodiment of the
present invention, wherein FIG. 1 (a) shows a storage state, and FIG. 1 (b) shows a developed
state.
FIG. 2 is a detailed view showing the bidirectional shape memory alloy of the underwater
transducer.
[0015]
In FIGS. 1 (a) and 1 (b), 10 is a command circuit, which outputs a command signal based on the
signal S1 from the base station.
A switch 20 connects the power source 30 and the bidirectional shape memory alloy 40 based
on a command signal from the command circuit 10.
That is, when the command signal is input, the switch 20 is turned on or off to supply power to
the bidirectional shape memory alloy 40 or to stop supplying power to the bidirectional shape
memory alloy 40.
[0016]
04-05-2019
4
As shown in FIGS. 1 (a) and 1 (b), the two-way shape memory alloy 40 is in the form of bellows at
a low temperature and is in a contracted state (stored state), and straight at a high temperature.
The one that is in the extended state (deployed state) is used.
Furthermore, as shown in FIG. 2, the outer periphery of the two-way shape memory alloy 40 is
covered with an insulator 41 to achieve electrical insulation and waterproof.
[0017]
Such a two-way shape memory alloy 40 is in a very small folded storage state, and therefore can
be stored in the empty space of the housing 1 a of the underwater transmitter-receiver 1 when in
the storage state (FIG. 1) See (a)).
[0018]
In FIG. 2, reference numeral 50 denotes a plurality of transducer elements, which are attached to
the bidirectional shape memory alloy 40 in a predetermined arrangement.
That is, these transmitting and receiving elements 50 are disposed at positions where they form
an ideal beam to detect sound waves and the like in water when the bi-directional shape memory
alloy 40 is in the unfolded state.
[0019]
Here, FIG. 3 is an explanatory view showing a use state of the underwater transducer according
to the present embodiment, and as shown in the figure, the underwater transducer 1 is a cable
71 of a winch 70 attached to a buoy 60. , And floats in water by the buoyancy of the buoy 60.
Further, by adjusting the length of the cable 71 with the winch 70, the depth of the underwater
transducer 1 in water is adjusted.
[0020]
04-05-2019
5
Next, the operation of the underwater transducer according to this embodiment will be described
with reference to FIGS. 1 to 3. As shown in FIG. 1A, the underwater transducer 1 stores the bidirectional shape memory alloy 40 and drops it together with the buoy 60 from an aircraft or the
like into water.
[0021]
After landing on the water, as shown in FIG. 1 (b), when the signal S1 is transmitted from the
base station (the aircraft), the command circuit 10 receiving the signal S1 turns the switch 20
into the ON state. Then, power is supplied to the two-way shape memory alloy 40 in the stored
state, and the two-way shape memory alloy 40, which has reached a high temperature, is in the
unfolded state shown in FIG. As a result, as shown in FIG. 2 and FIG. 3, the respective wave
transmitting / receiving elements 50 attached to the two-way shape memory alloy 40 are
disposed at the positions to form an ideal beam.
[0022]
Further, when the underwater transmitter-receiver 1 is recovered from the water, a signal is
transmitted from the base station, and the switch 20 is turned off by the command circuit 10.
Then, the supply of power to the two-way shape memory alloy 40 is stopped, and the two-way
shape memory alloy 40, which has reached a low temperature, is placed in the storage state
shown in FIG. Thereafter, in the case where the underwater transducer 1 is recovered from the
water and used again, it may be dropped into the water as it is stored.
[0023]
According to the underwater transducer of this embodiment, the transmitting and receiving
element 50 is expanded and stored by the two-way shape memory alloy 40, so that it is possible
to transmit and receive signals only from the base station. The wave element 50 can be deployed
and stored efficiently, and in particular, the wave transmitting / receiving element 50 can be
stored without requiring a human hand.
[0024]
04-05-2019
6
Further, the underwater transducer according to the present embodiment can reuse the
underwater transducer as it is simply by storing the two-way shape memory alloy 40, and
maintenance for reuse There is also the effect that you do not need
Furthermore, the configuration in which the bi-directional shape memory alloy 40 is driven by
the power supply 30 can reduce the cost of reuse as compared to the case where a conventional
gas is used.
[0025]
Furthermore, since the two-way shape memory alloy 40 can be folded and stored in a small size,
it can be stored in the empty space of the casing 1a of the underwater transducer 1, and such a
storage state is Due to the regularity of the two-way shape memory alloy 40, it is maintained
even when it receives an impact when it gets wet. Therefore, it is not necessary to provide a
dedicated case for protecting the two-way shape memory alloy 40, and the overall size of the
underwater transducer 1 can be reduced.
[0026]
The underwater transducer according to the present invention is not limited to the abovedescribed embodiment. For example, as shown in FIGS. 4 (a) and 4 (b), the bidirectional shape
memory alloy 40 has a low temperature. The same effect as the above embodiment can be
obtained even in the form of a coil which is in a contracted state at the time of, and in an
expanded state at a high temperature.
[0027]
As described above, according to the underwater transducer of the present invention, the
transmitting and receiving elements can be efficiently deployed and stored while having a simple
configuration, and the size of the device can be reduced. Can be
[0028]
Brief description of the drawings
[0029]
1 is a block diagram showing an underwater transducer according to an embodiment of the
04-05-2019
7
present invention, the figure (a) shows a storage state, and the figure (b) shows a developed state.
[0030]
2 is a detailed view showing the bidirectional shape memory alloy of the underwater transducer.
[0031]
3 is an explanatory view showing a use state of the underwater transducer.
[0032]
4 is a block diagram showing a modification of the underwater transducer, the figure (a) shows
the storage state, the figure (b) shows the unfolded state.
[0033]
5 is a block diagram showing an underwater transducer according to the conventional example.
[0034]
Explanation of sign
[0035]
Reference Signs List 1 underwater transducer 10 command circuit 20 switch 30 power supply
40 bi-directional shape memory alloy 50 transducer
04-05-2019
8