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JPS6069576

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DESCRIPTION JPS6069576
[0001]
TECHNICAL FIELD The present invention relates to a horizontal linear receiver array used in
water. [Prior Art] A conventional horizontal linear arrangement in which a plurality of receivers
are horizontally extended in water to form a linear arrangement. In the receiver array, multiple
beams are formed by phase alignment with delay lines etc., and signal detectors are connected to
each beam output to hear the sound. Therefore, the beam output in the direction in which the
target exists improves the ratio 4 to listen to the sound. The directivity pattern of the beam
output at this time can form a conical shape symmetrical to the array axis 0 Such horizontal
linear receiver array by knowing the ratio of signal output level between beams It is known that
it has an orientation information of Kana-f, but it can not distinguish between the left and right of
the array axis essentially, and an error caused by the supine angle of the incident sound. Ship
array In the case of towing from a ship etc., it is possible to measure the correct direction by
changing the steering direction of the course, but there is a drawback that another solution is
required when extending using a current from a buoy. [Object of the Invention] The present
invention is made to solve the above-mentioned drawbacks of the prior art "ff": it is possible to
remove the ambiguity of orientation measurement and to perform accurate orientation
measurement It is an object of the present invention to realize a linear receiver array 〇
[Arrangement of the invention] In order to achieve the above object, the present invention is
directed to having a cosine and sine pattern at the acoustic center position of the receiver array.
The orientation receivers are arranged n parallel and at right angles to the array axis so as to
measure the direction. DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a side view
showing an embodiment of the horizontal array type quantity wave array according to the
present invention, in which 1 to 17 are nondirectional receivers, and 18 is a receiver / signal
transmission. It is a multicore cable. The reference numeral 19 denotes a drogue provided at the
end of the multicore cable 18. The receiver array consisting of the multicore cable 18 to which
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the nondirectional receivers 1 to 17 and n are attached is horizontally and linearly formed by the
ocean current It is a resistor to be extended. 20 is an electronic circuit constituting the end of the
receiver array, 21 is a cable for suspending the receiver array several hundred meters below the
surface of the water and transmitting the receiver array signal to the surface of the water, 22 is
the receiver array Dipole directional receiver installed at right angles to the array axis of the
antenna, 23 is a dipole directional receiver installed parallel to the array axis, 24 is a compass Is
the same as a conventional horizontal linear receiver array, but the present invention is directed
to a dipole directional receiver 22 having a cosine pattern at the acoustic center position of the
receiver array, that is, at the position of the omnidirectional receiver 9. In addition, a tie pole
directional receiver 23 having a sine pattern and a compass 24 are installed to perform direction
measurement, that is, a nondirectional receiver 1 to 17 and a dipole directional receiver The
acoustic signal of the signal generator 22.23 and the signal of the compass 24 are collected in
the termination circuit 20 and multiplexed, and are transmitted through the cable 21. The zero
observation station separates and demodulates this multiplexed signal to receive an
omnidirectional reception. The received signals from the wave devices 1 to 17 are phased to
form a beam for listening, and the direction calculation is performed using the beam output that
can be heard most frequently and the signal from the dipole directional receiver 22.23.
In this case, the phase shift that occurs with multiplexed transmission, beamforming, etc. should
be corrected to 0 or the signal of the compass 24 to exchange the azimuth angle along the array
axis with an absolute azimuth angle. Used for FIG. 2 is a diagram showing the directivity when
the receiver array is viewed from above, and the azimuth is 0 ° in the direction perpendicular to
the array axis, and the beam output is defined as a maximum of 84 in the + 60 ° direction. Here,
the calculation of the direction measurement may be performed using the method shown in
Japanese Patent Publication No. 55-28514 and using the beam output in the direction of 5 K +
60 ° of the nondirectional receiver output. That is, after calculating the cross correlation
coefficient between the beam power and the cosine and sine, it is possible to obtain the direction
by calculating the inverse tangent of the ratio of both coefficients. The acoustic wave receiver
22.23 can be realized by, for example, a velocity type wave receiver as shown in Japanese Patent
Application No. 54-05085. FIG. 3 is a perspective view showing the receiver structure at the
acoustic center position of the receiver array, in which the multicore cable 18 is connected to the
container 25 and the omnidirectional receiver 9 and compass 24 are housed in the container 25.
Is installed. Then, the dipole directional receiver 22.23 is suspended from the container 25
through the three rubbers 26 and is perpendicular to the array axis in the dipole directional
receiver 22.23. And two vibrometers 27 placed parallel to each other. Although FIG. 1 shows an
example in which 17 nondirectional receivers are arranged, the present invention is not limited
to 17 and, in general, a larger number of nondirectional receivers are used. Used. Further, the
reason why the nondirectional receivers in FIG. 1 are arranged with a smaller spacing as they
approach the acoustic center is to cover a wide acoustic frequency band. [Effects of the
Invention] As described above, one invention of the present invention is directed by installing a
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directional receiver having a cosine and sine pattern at the acoustic center position of the
receiver array in a direction perpendicular and parallel to the array axis. Since the horizontal
array and the input / output are used as the reference signal for measurement instead of the
nondirectional output, the effect that accurate measurement values can be obtained even when
the underwater sound has low intensity is obtained. Certainly, by adding a simple pair of
directional receivers as described above, it is possible to remove the ambiguity of the direction
measurement and perform the direction measurement with high accuracy, so using the ocean
current from the buoy 0 which is also effective when the director
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a side view showing an embodiment of a horizontal linear quantity wave detector array
according to the present invention, FIG. 2 is an explanatory view of a directivity pattern used in
the present invention, and FIG. 3 is an acoustic center position of the receiver array. It is a
perspective view showing the wave receiver structure in #VC.
1 to 17: non-directional wave receiver 18: multi-core cable 19: drogue 20: termination circuit 21:
transmission cable 22.23: dipole directional wave receiver 24 · · Compass 25 · · · Container 26 · · ·
2T · · · 2T · · · vibration meter procedure correction (書) May 23, 1984 Secretary General of
Patent Office Kazuo Wakasugi Hall 1, display of the case Patent application for patent 1958, No.
176369 % 2, Title of the Invention Horizontal Linear Delivery Array 3, Relationship with the Case
for Correction Patent Applicant Residence Toranomon 1-chome, Minato-ku, Tokyo Name: (029)
Representative of Oki Electric Industry Co., Ltd. Hashimoto Nankaio 4, agent 5, date of correction
instruction (self-generated) 7, content of correction 1, IJJ book, page 5, fourth line "convert" to
"convert to" Do. The same page, line 8 "specified. "I assumed. To correct. On the same page, the
17th line “r-05085” is corrected to “r-050856”.
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