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JP2000134689

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DESCRIPTION JP2000134689
[0001]
TECHNICAL FIELD The present invention relates to a receive array used for a sonar used in water
or air, an acoustic antenna for acoustic communication, etc., having a plurality of acoustic
apertures and a sound wave propagation path for incidence. The configuration of the device is
simplified as a configuration that receives the received acoustic signal with a minimum of
sensors.
[0002]
2. Description of the Related Art In a receiving array used in a conventional sonar or the like, a
large number of acoustic sensors are used in one system to construct a directional receiving
array. The hardware configuration of the signal processing unit has been large, for example, each
acoustic sensor is provided with a receiving amplifier consisting of an individual system.
[0003]
As described above, in the conventionally used receiving array, a large number of acoustic
sensors are used to improve directivity in one system of sonar, and input from the aperture of
each acoustic sensor Since the acoustic input signal is signal-processed in each system, the
apparatus becomes large, and simplification of the apparatus has been desired.
[0004]
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1
Therefore, in the present invention, in the receiving array, a plurality of acoustic openings on
which acoustic input signals are incident are provided and propagated through a plurality of
sound wave propagation paths, and the incident acoustic signals can be detected by a minimum
acoustic sensor. It is an object of the present invention to provide a receive array capable of
simplifying the signal processing unit of the receive array as a system and miniaturizing the
entire apparatus.
[0005]
SUMMARY OF THE INVENTION The present invention provides the following means (1) to (4) in
order to solve the above-mentioned problems.
[0006]
(1) A plurality of sound wave propagation paths having an acoustic opening that transmits an
acoustic signal and propagating a signal incident from the opening are provided, and the
plurality of sound wave propagation paths are collected and communicated to each of these
paths A single sound wave propagation path, and an acoustic sensor provided at the end of the
single sound wave propagation path, receiving an acoustic signal propagated from the plurality
of sound wave propagation paths, and converting the acoustic signal into an electrical signal or
an optical signal A receive array characterized by comprising.
[0007]
(2) The wave receiving array according to (1), wherein the single sound wave propagation path
and the acoustic sensor are in two systems and are respectively in communication with the
plurality of sound wave propagation paths.
[0008]
(3) The wave receiving array according to (1), wherein a plurality of systems consisting of a
sound wave propagation path having a plurality of acoustic openings, a single sound wave
propagation path and a system consisting of an acoustic sensor are combined.
[0009]
(4) The wave receiving array according to any one of (1) to (3), wherein the wave receiving array
is disposed in a container in water or air.
[0010]
04-05-2019
2
In (1) of the present invention, although a plurality of sound wave propagation paths having
acoustic openings are arranged, each acoustic opening can be arranged three-dimensionally at an
arbitrary position.
Acoustic signals from a plurality of arbitrary positions are propagated by the respective acoustic
wave propagation paths to be collected into a single acoustic wave propagation path, from which
they are received by one acoustic sensor and converted into electrical signals.
Therefore, since the output signal from the acoustic sensor propagates in the observation space
and contains the information of the sound wave at any position that has been propagated to each
acoustic aperture, sonar reception for which a narrow reception beam needs to be formed It can
be used as a signal or a received signal for acoustic communication.
Moreover, since it is not necessary to arrange a sound pressure sensor in each acoustic opening,
the number of sound pressure sensors can be reduced, and the number of wave receiving
amplifiers and signal processing hardware can be reduced. Can be miniaturized.
[0011]
In (2) of the present invention, since a single sound wave propagation path and a system of
acoustic sensors are composed of two systems, output signals from the respective acoustic
sensors have different waveforms, and in addition to the effect of the above (1) The amount of
information can be further increased, and directivity can be improved.
[0012]
In (3) of the present invention, the number of acoustic openings can be increased more than in
the case of (1) above, and the spatial range for sensing the sound wave propagating in space can
be expanded. It is possible to form a narrower receive beam than the
[0013]
According to (4) of the present invention, since the receive array of (3) is disposed in a container
in water or air, the output signal from the acoustic sensor needs to form a narrower receive
beam. It can be used as a received wave signal for acoustic communication and a received wave
signal for acoustic communication.
04-05-2019
3
[0014]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the reception array
proposed in the present invention is roughly classified into the following three parts.
That is, it comprises (A) acoustic aperture, (B) sound wave propagation path, and (C) acoustic
sensor.
(A) The acoustic opening portion is a portion having a structure capable of transmitting a sound
wave propagating in a space such as underwater or in the air in a state of little attenuation,
which is an end portion of a sound wave propagation path described below And are arranged at a
plurality of positions in a three-dimensional manner.
[0015]
(B) The sound wave propagation path is a sound wave propagation path in which sound waves
incident on any number of arbitrary acoustic openings propagate as elastic waves such as
longitudinal waves and transverse waves.
Also, the propagation paths are coupled such that sound waves incident on the plurality of
acoustic apertures propagate to the smallest acoustic sensor.
[0016]
(C) An acoustic sensor is a sensor which converts elastic waves, such as a longitudinal wave and a
transverse wave, into an electric signal, an optical signal, etc.
[0017]
Hereinafter, embodiments of the present invention will be specifically described based on the
drawings.
04-05-2019
4
FIG. 1 shows a wave receiving array according to a first embodiment of the present invention, in
which (a) shows propagation of sound waves, and (b) is a side view of the wave receiving array.
In FIG. 1, a1, a2, and a3 are acoustic apertures, and are disposed at a plurality of positions in a
three-dimensional manner.
b1, b2 and b3 are sound wave propagation paths, which are composed of three propagation
paths in the figure.
c1 is a sound wave propagation path which gathers the sound wave propagation paths b1, b2
and b3, d1 is an acoustic sensor and is provided at the end of the sound wave propagation path
c1.
[0018]
In the receiving array of the above configuration, the sound wave P propagating in space is
incident on each of the acoustic openings a1, a2, and a3.
The sound waves incident on the acoustic openings a1, a2, and a3 propagate through the sound
wave propagation paths b1, b2, and b3, and are collected by the sound wave propagation path
c1.
[0019]
The sound wave propagated to the sound wave propagation path c1 is received by the acoustic
sensor d1 and converted into an electric signal or an optical signal. The output signal of the
acoustic sensor d1 includes information of each sound wave propagated in the observation space
at an arbitrary position and propagated to each of the acoustic openings a1, a2, and a3, and this
output signal is a narrow received wave. It can be used as a sonar reception signal requiring
formation of a beam or the like, or as an acoustic communication reception signal. Further, since
only one acoustic sensor d1 is required, the number of wave receiving amplifiers and hardware
04-05-2019
5
for signal processing can be reduced, and the signal processing unit can be miniaturized.
[0020]
FIG. 2 shows a wave receiving array according to a second embodiment of the present invention,
in which (a) shows propagation of sound waves, and (b) shows a side view of the wave receiving
array. In FIG. 2, as in the case of the first embodiment of FIG. 1, it comprises three parts: an
acoustic aperture, a sound wave propagation path, and an acoustic sensor. Reference symbols a1,
a2, and a3 denote acoustic openings, and b1, b2, and b3 denote sound wave propagation paths,
which have the same configuration as in FIG.
[0021]
c1 and c2 are sound wave propagation paths for collecting the sound wave propagation paths
b1, b2 and b3, and two are provided. d1 and d2 are acoustic sensors, which are provided at the
ends of the sound wave propagation paths c1 and c2, respectively.
[0022]
In the receiving array of the above configuration, the sound wave P propagating in space is
incident on each of the acoustic openings a1, a2, and a3. The sound waves incident on the
acoustic openings a1, a2, and a3 propagate through the sound wave propagation paths b1, b2,
and b3, and are collected by the sound wave propagation paths c1 and c2. The sound waves
propagated to the sound wave propagation paths c1 and c2 are respectively received by the
acoustic sensors d1 and d2 and converted into electric signals or optical signals.
[0023]
The output signals of the acoustic sensors d1 and d2 include information of each sound wave
propagated in a plurality of observation spaces and propagated to each acoustic aperture, and
this output signal includes the formation of a narrow receiving beam, etc. It can be used as a
necessary sonar reception signal and acoustic communication reception signal. In the case of the
second embodiment, since the output signals of the acoustic sensors d1 and d2 have different
04-05-2019
6
waveforms, the amount of information can be increased as compared with the first embodiment.
Further, since only two acoustic sensors d1 and d2 are required, the number of wave receiving
amplifiers and hardware for signal processing can be reduced, and the signal processing unit can
be miniaturized.
[0024]
FIG. 3 shows a wave receiving array according to a third embodiment of the present invention, in
which (a) shows propagation of sound waves, and (b) shows a side view of the wave receiving
array. In FIG. 3, as in the first embodiment shown in FIG. 1, it comprises three parts: an acoustic
aperture, a sound wave propagation path, and an acoustic sensor. a1, a2 and a3 are acoustic
openings, and a11, a12 and a13 are also acoustic openings.
[0025]
b1, b2 and b3 are sound wave propagation paths, b11, b12 and b13 are also sound wave
propagation paths, and constitute paths corresponding to the respective acoustic openings. c1 is
a sound wave propagation path for collecting the sound wave propagation paths b1, b2 and b3,
c2 is a sound wave propagation path for collecting the sound wave propagation paths b11, b12
and b13, d1 and d11 are provided at the ends of the sound wave propagation paths c1 and c11
Sound sensor.
[0026]
In the receiving array of the above configuration, the sound wave P propagating in space is
incident on each of the acoustic apertures a1, a2, a3 and a11, a12, a13. Sound waves incident on
the respective acoustic openings a1, a2 and a3 propagate through the sound wave propagation
paths b1, b2 and b3 and are collected by the sound wave propagation path c1, while being
incident on the respective acoustic openings a11, a12 and a13 The generated sound waves
propagate through the sound wave propagation paths b11, b12 and b13, and are collected by
the sound wave propagation path c11. The sound waves propagated to the sound wave
propagation paths c1 and c11 are received by the acoustic sensors d1 and d11, respectively, and
converted into electric signals and the like.
04-05-2019
7
[0027]
The output signals of the acoustic sensors d1 and d11 include information of each sound wave
propagated in a plurality of observation spaces and propagated to the acoustic openings a1 to a3
and a11 to a13, and this output signal is narrow It can be used as a sonar receiving signal
requiring formation of a receiving beam and the like, and as a receiving signal for acoustic
communication.
[0028]
In the case of the third embodiment described above, the number of acoustic openings can be
increased, and the spatial range for sensing the sound wave propagating in space can be
broadened. In comparison, it is possible to form an even narrower receive beam.
Further, since only two acoustic sensors d1 and d11 are required, the number of wave receiving
amplifiers and hardware for signal processing can be reduced as compared with the prior art,
and the signal processing unit can be miniaturized.
[0029]
4 and 5 show a wave receiving array according to a fourth embodiment of the present invention,
FIG. 4 is a front view, and FIG. 5 is a side view. In the first, second, and third embodiments, the
method of configuring the acoustic aperture, the sound wave propagation path, and the three
parts of the acoustic sensor is shown. However, in FIG. 4 and FIG. An example of application as a
sonar or communication antenna of
[0030]
In FIG. 4 and FIG. 5, e is an outer shell of the device, and the acoustic aperture, the sound wave
propagation path, and the symbols representing the acoustic sensor are the same as those in FIG.
Acoustic openings a1, a2, a3 and a11, a12, a13 are provided on the inside of the enclosure e of
the device. By the same function as that of the third embodiment, the signals output from the
acoustic sensors d1 and d11 can be used as a sonar reception signal and an acoustic
communication reception signal which require the formation of narrow reception beams. Further,
as compared with the conventional underwater sonar, two acoustic sensors d1 and d11 are
04-05-2019
8
sufficient, so that the configuration in the outer shell e becomes compact.
[0031]
According to the present invention, the receiving array of the present invention has (1) an
acoustic aperture for transmitting an acoustic signal, and providing a plurality of sound wave
propagation paths for propagating a signal incident from the aperture; Sound wave propagation
paths are collected, provided at a single sound wave propagation path communicating with each
of these paths, and at the end of the single sound wave propagation path, and acoustic signals
propagated from the plurality of sound wave propagation paths are received , And an acoustic
sensor that converts the light signal into an electrical signal or an optical signal. With such a
configuration, since the output signal from the acoustic sensor propagates in the observation
space and contains information on the sound wave at any position that has propagated to each
acoustic aperture, it is necessary to form a narrow reception beam. It can be used as a received
signal for sonar and a received signal for acoustic communication. Moreover, since it is not
necessary to arrange a sound pressure sensor in each acoustic opening, the number of sound
pressure sensors can be reduced, and the number of wave receiving amplifiers and signal
processing hardware can be reduced. Can be miniaturized.
[0032]
In (2) of the present invention, in the invention of (1) above, since the single sound wave
propagation path and the system of the acoustic sensor are composed of two systems, the output
signals from the respective acoustic sensors have different waveforms, In addition to the effect of
(1), the amount of information can be further increased.
[0033]
According to (3) of the present invention, in the invention of (1), a plurality of systems combining
the sound wave propagation path having the plurality of acoustic apertures, a single sound wave
propagation path and an acoustic sensor are combined, Since the number of acoustic openings
can be increased more than in the case of (1) above, and the spatial range for sensing the sound
wave propagating in space can be expanded, the received beam is narrower than the above (1)
Can be formed.
[0034]
In (4) of the present invention, in the invention of (3) above, since the wave receiving array is
disposed in the container, the output signal from the acoustic sensor requires a narrower wave
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9
receiving beam for receiving for a sonar It can be used as a wave signal or a received wave signal
for acoustic communication.
04-05-2019
10
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