JP3716110B2 - Receiving array - Google Patents
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【０００１】
【発明の属する技術分野】
本発明は、水中、空気中で使用されるソーナー用、音響通信用の音響アンテナ等に用いられる受波アレイに関し、音響的開口部及び音波伝搬経路を複数備えて入射した音響信号を最少のセンサーで受信する構成として装置の構成を簡略化するものである。
【０００２】
【従来の技術】
従来のソーナー等に用いられている受波アレイでは、指向性の鋭い受波アレイを構成するにあたり、１つのシステムで多数の音響センサーが使用されている。各音響センサーにはそれぞれ個別の系統からなる受波アンプが設けられているなど、信号処理部のハード構成が大がかりなものとなっていた。
【０００３】
【発明が解決しようとする課題】
前述のように従来用いられている受波アレイは、ソーナーの１システムにおいて指向性を高めるために多数の音響センサーが用いられ、各音響センサーの開口から入力する音響入力信号はそれぞれの系において信号処理されるので装置が大がかりとなり、装置の簡素化が望まれていた。
【０００４】
そこで、本発明では、受波アレイにおいて、音響入力信号が入射する音響的開口部を複数個設けると共に複数の音波伝搬経路で伝搬し、これら入射した音響信号を最少の音響センサーで検知できるようなシステムとして受波アレイの信号処理部を簡素化し、装置全体を小型化することのできる受波アレイを提供することを課題としてなされたものである。
【０００５】
【課題を解決するための手段】
本発明は前述の課題を解決するために次の（１）乃至（４）の手段を提供する。
【０００６】
（１）音響信号を透過する音響的開口部を有し、同開口部より入射した信号を伝搬する音波伝搬経路を複数本設け、同複数の音波伝搬経路を集合し、これら各経路に連通する単一の音波伝搬経路と、同単一の音波伝搬経路の終端に設けられ、前記複数の音波伝搬経路より伝搬されてくる音響信号を受信し、電気信号若しくは光信号に変換する音響センサーとを備えてなることを特徴とする受波アレイ。
【０００７】
（２）前記単一の音波伝搬経路及び音響センサーは２系統からなり、前記複数の音波伝搬経路にそれぞれ連通することを特徴とする（１）記載の受波アレイ。
【０００８】
（３）前記複数の音響的開口部を有する音波伝搬経路及び単一の音波伝搬経路及び音響センサーからなる系統を複数系統組合せたことを特徴とする（１）記載の受波アレイ。
【０００９】
（４）前記受波アレイが水中または空気中の容器内に配置されていることを特徴とする（１）から（３）のいずれかに記載の受波アレイ。
【００１０】
本発明の（１）においては、音響的開口部を有する音波伝搬経路が複数本配置されるが、各音響的開口部は３次元的に任意の位置に配置できる。複数の任意の位置からの音響信号は各音波伝搬経路により伝搬されて単一の音波伝搬経路へ集合し、ここから１個の音響センサーで受信し、電気信号に変換される。従って音響センサーからの出力信号には観測空間を伝播し、各音響的開口部に伝搬してきた任意の位置の音波の情報が含まれているので、狭い受信ビームの形成が必要なソーナー用受波信号、音響通信用受波信号として使用できる。又、各音響的開口部に音圧センサーを配置する必要がないので、音圧センサーの数を少なくすることができ、また、受波アンプ、信号処理用ハードの数も少なくなり、信号処理部の小型化が可能となる。
【００１１】
本発明の（２）では、単一の音波伝搬経路及び音響センサーの系統が２系統からなっているので、各音響センサーからの出力信号が異なった波形となり、上記（１）の効果に加えて、情報量がより一層増すことができ、指向性を向上させることができる。
【００１２】
本発明の（３）では、音響的開口部の数が上記（１）の場合よりも増加し、空間を伝搬してくる音波を感知する空間的範囲を拡大することができるので、上記（１）よりも更に狭い受波ビームの形成が可能となる。
【００１３】
本発明の（４）においては、上記（３）の受波アレイを水中または空気中の容器内に配置しているので、音響センサーからの出力信号はより狭い受波ビームの形成が必要なソーナー用受波信号、音響通信用受波信号として使用できる。
【００１４】
【発明の実施の形態】
まず、本発明で提案する受波アレイは大きく分類すると、次の３つの部分で構成されている。即ち、（Ａ）音響的開口部、（Ｂ）音波伝搬経路、（Ｃ）音響センサーからなっている。（Ａ）音響的開口部は、水中、空気中等の空間を伝搬してくる音波が、減衰が少ない状態で透過できる構造となっている部分で次に説明する音波伝搬経路の端部となるものであり、３次元的に複数の位置に配置される。
【００１５】
（Ｂ）音波伝搬経路は、任意の数の任意の音響的開口部に入射した音波が、縦波、横波など弾性波として伝搬する音波伝搬経路である。又、複数個の音響的開口部に入射した音波が最少の音響センサーに伝搬するように伝搬経路が結合している。
【００１６】
（Ｃ）音響センサーは、縦波、横波など弾性波を電気信号、光信号等に変換するセンサーである。
【００１７】
以下、本発明の実施の形態について図面に基づいて具体的に説明する。図１は本発明の実施の第１形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図である。図１において、ａ１，ａ２，ａ３は音響的開口部で３次元的に複数の位置に配置されている。ｂ１，ｂ２，ｂ３は音波伝搬経路であり、図では３本の伝搬経路から構成されている。ｃ１は音波伝搬経路ｂ１，ｂ２，ｂ３を集合する音波伝搬経路であり、ｄ１は音響センサーで、音波伝搬経路ｃ１の末端に設けられている。
【００１８】
上記構成の受波アレイにおいて、空間を伝搬してくる音波Ｐが各音響的開口部ａ１，ａ２，ａ３に入射する。各音響的開口部ａ１，ａ２，ａ３に入射した音波が、音波伝搬経路ｂ１，ｂ２，ｂ３を伝搬し、音波伝搬経路ｃ１により集合される。
【００１９】
音波伝搬経路ｃ１に伝搬してきた音波が、音響センサーｄ１により受信され、電気信号若しくは光信号等に変換される。音響センサーｄ１の出力信号には、任意の位置の観測空間を伝搬し各音響的開口部ａ１，ａ２，ａ３に伝搬してきた各音波の情報が含まれており、この出力信号は、狭い受波ビームの形成などが必要なソーナー用受波信号、音響通信用受波信号として使用できる。又、音響センサーｄ１が１個で良いので受波アンプ、信号処理用ハードの数も少くなり、信号処理部を小型にすることができる。
【００２０】
図２は、本発明の実施の第２形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図を示している。図２においては、図１の実施の第１形態の場合と同様に、音響的開口部、音波伝搬経路、音響センサーの３つの部分で構成されている。ａ１，ａ２，ａ３は音響的開口部、ｂ１，ｂ２，ｂ３は音波伝搬経路であり、図１と同様の構成である。
【００２１】
ｃ１，ｃ２は音波伝搬経路ｂ１，ｂ２，ｂ３を集合する音波伝搬経路であり２本が設けられている。ｄ１，ｄ２は音響センサーであり、それぞれ音波伝搬経路ｃ１，ｃ２の末端に設けられている。
【００２２】
上記構成の受波アレイにおいて、空間を伝搬してくる音波Ｐが各音響的開口部ａ１，ａ２，ａ３に入射する。各音響的開口部ａ１，ａ２，ａ３に入射した音波が、音波伝搬経路ｂ１，ｂ２，ｂ３を伝搬し、音波伝搬経路ｃ１，ｃ２により集合される。音波伝搬経路ｃ１，ｃ２に伝搬してきた音波が、それぞれ、音響センサーｄ１，ｄ２により受信され、電気信号若しくは光信号等に変換される。
【００２３】
音響センサーｄ１，ｄ２の出力信号には、複数の観測空間を伝搬し各音響的開口部に伝搬してきた各音波の情報が含まれており、この出力信号は、狭い受波ビームの形成などが必要なソーナー用受波信号、音響通信用受波信号として使用できる。本実施の第２形態の場合、音響センサーｄ１，ｄ２の出力信号が異なった波形となるので、実施の第１形態と比べて情報量を増すことができる。又、音響センサーもｄ１，ｄ２の２個で良いので受波アンプ、信号処理用ハードの数も少くなり、信号処理部を小型にすることができる。
【００２４】
図３は本発明の実施の第３形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図をそれぞれ示す。図３においては、図１に示す実施の第１形態と同様に、音響的開口部、音波伝搬経路、音響センサーの３つの部分で構成されている。ａ１，ａ２，ａ３は音響的開口部、ａ１１，ａ１２，ａ１３も音響的開口部である。
【００２５】
ｂ１，ｂ２，ｂ３は音波伝搬経路、ｂ１１，ｂ１２，ｂ１３も音波伝搬経路であり、それぞれの音響的開口部に対応している経路を構成している。ｃ１は音波伝搬経路ｂ１，ｂ２，ｂ３を集合する音波伝搬経路、ｃ１１は音波伝搬経路ｂ１１，ｂ１２，ｂ１３を集合する音波伝搬経路、ｄ１，ｄ１１はそれぞれ音波伝搬経路ｃ１，ｃ１１の末端に設けられた音響センサーである。
【００２６】
上記構成の受波アレイにおいて、空間を伝搬してくる音波Ｐが各音響的開口部ａ１，ａ２，ａ３ならびにａ１１，ａ１２，ａ１３に入射する。各音響的開口部ａ１，ａ２，ａ３に入射した音波が、音波伝搬経路ｂ１，ｂ２，ｂ３を伝搬し、音波伝搬経路ｃ１により集合され、一方、各音響的開口部ａ１１，ａ１２，ａ１３に入射した音波は、音波伝搬経路ｂ１１，ｂ１２，ｂ１３を伝搬し、音波伝搬経路ｃ１１により集合される。音波伝搬経路ｃ１，ｃ１１に伝搬してきた音波が、それぞれ、音響センサーｄ１，ｄ１１により受信され、電気信号等に変換される。
【００２７】
音響センサーｄ１，ｄ１１の出力信号には、複数の観測空間を伝搬し各音響的開口部ａ１〜ａ３，ａ１１〜ａ１３に伝搬してきた各音波の情報が含まれており、この出力信号は、狭い受波ビームの形成などが必要なソーナー用受波信号、音響通信用受波信号として使用できる。
【００２８】
上記の実施の第３形態の場合、音響的開口部の数を増し、空間を伝搬してくる音波を感知する空間的な範囲を広くすることができるので、実施の第１，第２形態に比べて、さらに狭い受波ビームの形成などが可能である。又、音響センサーもｄ１，ｄ１１の２個で良いので従来と比べて受波アンプ、信号処理用ハードの数も少くなり、信号処理部を小型にすることができる。
【００２９】
図４，図５は実施の第４形態に係る受波アレイを示し、図４は正面図、図５は側面図である。実施の第１，第２，第３形態では、音響的開口部、音波伝搬経路、音響センサーの３つの部分の構成方法について示しているが、図４，図５に、受波アレイを機器等のソーナーあるいは通信用アンテナとして適用した例を示す。
【００３０】
図４，図５において、ｅは機器の外郭であり、音響的開口部、音波伝搬経路、音響センサーを表す記号は図３と同様である。音響的開口部ａ１，ａ２，ａ３ならびにａ１１，ａ１２，ａ１３が機器の外郭ｅ内の上に設けられている。実施の第３形態と同様な働きにより、音響センサーｄ１，ｄ１１から出力される信号は狭い受波ビームの形成などが必要なソーナー用受波信号、音響通信用受波信号として使用できる。又、従来の水中ソーナーと比べて音響センサーがｄ１，ｄ１１の２個で良いので外郭ｅ内での構成がコンパクトになる。
【００３１】
【発明の効果】
本発明の受波アレイは、（１）音響信号を透過する音響的開口部を有し、同開口部より入射した信号を伝搬する音波伝搬経路を複数本設け、同複数の音波伝搬経路を集合し、これら各経路に連通する単一の音波伝搬経路と、同単一の音波伝搬経路の終端に設けられ、前記複数の音波伝搬経路より伝搬されてくる音響信号を受信し、電気信号若しくは光信号に変換する音響センサーとを備えてなることを基本的な構成としている。このような構成により、音響センサーからの出力信号には観測空間を伝搬し、各音響的開口部に伝搬してきた任意の位置の音波の情報が含まれているので、狭い受信ビームの形成が必要なソーナー用受波信号、音響通信用受波信号として使用できる。又、各音響的開口部に音圧センサーを配置する必要がないので、音圧センサーの数を少なくすることができ、また、受波アンプ、信号処理用ハードの数も少なくなり、信号処理部の小型化が可能となる。
【００３２】
本発明の（２）では、上記（１）の発明において、単一の音波伝搬経路及び音響センサーの系統が２系統からなっているので、各音響センサーからの出力信号が異なった波形となり、上記（１）の効果に加えて、情報量がより一層増すことができる。
【００３３】
本発明の（３）では、上記（１）の発明において、前記複数の音響的開口部を有する音波伝搬経路及び単一の音波伝搬経路及び音響センサーからなる系統を複数系統組合せた構成であり、音響的開口部の数が上記（１）の場合よりも増加し、空間を伝搬してくる音波を感知する空間的範囲を拡大することができるので、上記（１）よりも更に狭い受波ビームの形成が可能となる。
【００３４】
本発明の（４）では、上記（３）の発明において、前記受波アレイが容器内に配置されているので、音響センサーからの出力信号はより狭い受波ビームの形成が必要なソーナー用受波信号、音響通信用受波信号として使用できる。
【図面の簡単な説明】
【図１】本発明の実施の第１形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図である。
【図２】本発明の実施の第２形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図である。
【図３】本発明の実施の第３形態に係る受波アレイを示し、（ａ）は音波の伝搬を示す図、（ｂ）は受波アレイの側面図である。
【図４】本発明の実施の第４形態に係る受波アレイの正面図である。
【図５】本発明の実施の第４形態に係る受波アレイの側面図である。
【符号の説明】
ａ１，ａ２，ａ３ 音響的開口部
ａ１１，ａ１２，ａ１３ 音響的開口部
ｂ１，ｂ２，ｂ３ 音波伝搬経路
ｂ１１，ｂ１２，ｂ１３ 音波伝搬経路
ｃ１，ｃ１１ 音波伝搬経路
ｄ１，ｄ２，ｄ１１ 音響センサー
ｅ 外郭
Ｐ 音波[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a receiving array used for an acoustic antenna for sonar and acoustic communication used in water and in the air, and relates to a receiving array having a plurality of acoustic openings and sound wave propagation paths, and having a minimum number of incident acoustic signals. The configuration of the apparatus is simplified as a configuration for receiving data.
[0002]
[Prior 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 form a receiving array with sharp directivity. Each acoustic sensor is provided with a receiving amplifier composed of an individual system, and the hardware configuration of the signal processing unit is large.
[0003]
[Problems to be solved by the invention]
As described above, in the receiving array conventionally used, a large number of acoustic sensors are used to enhance directivity in one sonar system, and the acoustic input signals input from the openings of the respective acoustic sensors are signals in the respective systems. Since processing is performed, the apparatus becomes large, and it is desired to simplify the apparatus.
[0004]
Therefore, in the present invention, the receiving array is provided with a plurality of acoustic openings into which acoustic input signals are incident and propagates through a plurality of sound wave propagation paths, and these incident acoustic signals can be detected by a minimum acoustic sensor. It is an object of the present invention to provide a receiving array that simplifies the signal processing unit of the receiving array as a system and can reduce the size of the entire apparatus.
[0005]
[Means for Solving the Problems]
The present invention provides the following means (1) to (4) to solve the above-mentioned problems.
[0006]
(1) An acoustic opening that transmits an acoustic signal is provided, and a plurality of sound wave propagation paths for propagating a signal incident from the opening are provided, and the plurality of sound wave propagation paths are assembled and communicated with 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 for receiving an acoustic signal propagated from the plurality of sound wave propagation paths and converting it into an electrical signal or an optical signal. A receiving array comprising the receiving array.
[0007]
(2) The wave receiving array according to (1), wherein the single sound wave propagation path and the acoustic sensor are composed of two systems and communicate with the plurality of sound wave propagation paths, respectively.
[0008]
(3) The receiving array according to (1), wherein a plurality of systems composed of a sound wave propagation path having a plurality of acoustic openings, a single sound wave propagation path, and an acoustic sensor are combined.
[0009]
(4) The receiving array according to any one of (1) to (3), wherein the receiving array is disposed in a container in water or air.
[0010]
In (1) of the present invention, a plurality of sound wave propagation paths having acoustic openings are arranged, but each acoustic opening can be arranged three-dimensionally at an arbitrary position. Acoustic signals from a plurality of arbitrary positions are propagated by each sound wave propagation path and gathered into a single sound wave propagation path, and are received by one acoustic sensor from there and converted into an electrical signal. Therefore, the output signal from the acoustic sensor propagates through the observation space and includes information on the sound wave at any position that has propagated to each acoustic aperture. It can be used as a signal and a received signal for acoustic communication. In addition, since there is no need to arrange a sound pressure sensor in each acoustic opening, the number of sound pressure sensors can be reduced, and the number of receiving amplifiers and signal processing hardware is also reduced. Can be miniaturized.
[0011]
In (2) of the present invention, since the single sound wave propagation path and the acoustic sensor system consist of two systems, the output signal from each acoustic sensor has a different waveform, in addition to the effect of (1) above. The amount of information can be further increased, and the directivity can be improved.
[0012]
In (3) of the present invention, the number of acoustic openings is increased as compared with the case of (1), and the spatial range for detecting sound waves propagating through the space can be expanded. It is possible to form a receiving beam that is narrower than ().
[0013]
In (4) of the present invention, since the receiving array of (3) is arranged in a container in water or in air, the output signal from the acoustic sensor is a sonar that requires a narrower receiving beam to be formed. It can be used as a received signal for sound and a received signal for acoustic communication.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
First, the receiving array proposed in the present invention is roughly classified into the following three parts. That is, (A) an acoustic opening, (B) a sound wave propagation path, and (C) an acoustic sensor. (A) The acoustic opening is an end of a sound wave propagation path described below in a portion where a sound wave propagating through a space such as underwater or air can be transmitted with little attenuation. It is arranged at a plurality of positions three-dimensionally.
[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. In addition, the propagation paths are coupled so that the sound wave incident on the plurality of acoustic openings propagates to the least acoustic sensor.
[0016]
(C) The acoustic sensor is a sensor that converts an elastic wave such as a longitudinal wave or a transverse wave into an electric signal, an optical signal, or the like.
[0017]
Embodiments of the present invention will be specifically described below with reference to the drawings. 1A and 1B show a wave receiving array according to a first embodiment of the present invention, in which FIG. 1A is a diagram showing propagation of sound waves, and FIG. 1B is a side view of the wave receiving array. In FIG. 1, a1, a2, and a3 are acoustic openings and are three-dimensionally arranged at a plurality of positions. b1, b2, and b3 are sound wave propagation paths, and are composed of three propagation paths in the figure. c1 is a sound wave propagation path that aggregates the sound wave propagation paths b1, b2, and b3, and d1 is an acoustic sensor provided at the end of the sound wave propagation path c1.
[0018]
In the receiving array having the above configuration, the sound wave P propagating through the space is incident on the acoustic openings a1, a2, and a3. 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.
[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, an optical signal, or the like. The output signal of the acoustic sensor d1 includes information on each sound wave that has propagated through the observation space at an arbitrary position and has propagated to the acoustic openings a1, a2, and a3. It can be used as a received signal for sonar and acoustic communication that require beam formation. Further, since only one acoustic sensor d1 is required, the number of receiving amplifiers and signal processing hardware is reduced, and the signal processing unit can be reduced in size.
[0020]
2A and 2B show a wave receiving array according to the second embodiment of the present invention, in which FIG. 2A shows the propagation of sound waves, and FIG. 2B shows a side view of the wave receiving array. In FIG. 2, as in the case of the first embodiment of FIG. 1, it is composed of three parts: an acoustic opening, a sound wave propagation path, and an acoustic sensor. Reference numerals 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 that aggregate the sound wave propagation paths b1, b2, and b3, and two lines 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 having the above configuration, the sound wave P propagating through the space is incident on the acoustic openings a1, a2, and a3. Sound waves incident on the acoustic openings a1, a2, and a3 propagate along the sound wave propagation paths b1, b2, and b3, and are collected by the sound wave propagation paths c1, c2. The sound waves propagating to the sound wave propagation paths c1 and c2 are received by the acoustic sensors d1 and d2, respectively, and converted into electric signals, optical signals, or the like.
[0023]
The output signals of the acoustic sensors d1 and d2 include information on each sound wave that has propagated through a plurality of observation spaces and propagated to each acoustic opening, and this output signal may include the formation of a narrow received beam. 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 waveforms, the amount of information can be increased as compared with the first embodiment. Also, since two acoustic sensors d1 and d2 are sufficient, the number of receiving amplifiers and signal processing hardware is reduced, and the signal processing unit can be made compact.
[0024]
3A and 3B show a wave receiving array according to a third embodiment of the present invention, in which FIG. 3A shows the propagation of sound waves, and FIG. 3B shows a side view of the wave receiving array. In FIG. 3, similarly to the first embodiment shown in FIG. 1, it is composed of three parts: an acoustic opening, 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, and b11, b12, and b13 are sound wave propagation paths, and constitute paths corresponding to the respective acoustic openings. c1 is provided at the end of the wave propagation path, c 11 is wave propagation paths to set the acoustic wave propagation path b11, b12, b13, d1, d11 each wave propagation path c1, c11 to set the acoustic wave propagation path b1, b2, b3 Acoustic sensor.
[0026]
In the receiving array having the above configuration, the sound wave P propagating through the space is incident on the acoustic openings a1, a2, a3 and a11, a12, a13. Sound waves incident on the acoustic openings a1, a2, and a3 propagate along the sound wave propagation paths b1, b2, and b3 and are collected by the sound wave propagation paths c1, while entering the acoustic openings a11, a12, and a13. The transmitted sound waves propagate through the sound wave propagation paths b11, b12, b13 and are collected by the sound wave propagation path c11. The sound waves propagating to the sound wave propagation paths c1 and c11 are received by the acoustic sensors d1 and d11, respectively, and converted into electric signals or the like.
[0027]
The output signals of the acoustic sensors d1 and d11 include information on each sound wave that has propagated through 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 received signal for sonar and a received signal for acoustic communication that require formation of a received beam.
[0028]
In the case of the third embodiment described above, the number of acoustic openings can be increased and the spatial range for sensing sound waves propagating through the space can be widened. Compared with this, it is possible to form a narrower received beam. Also, since two acoustic sensors d1 and d11 are sufficient, the number of receiving amplifiers and signal processing hardware is reduced compared to the conventional one, and the signal processing unit can be made compact.
[0029]
4 and 5 show a receiving array according to the fourth embodiment, FIG. 4 is a front view, and FIG. 5 is a side view. In the first, second, and third embodiments, the configuration method of the three portions of the acoustic opening, the sound wave propagation path, and the acoustic sensor is shown. FIG. 4 and FIG. An example applied as a sonar or communication antenna.
[0030]
4 and 5, e is the outline of the device, and symbols representing the acoustic opening, the sound wave propagation path, and 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 outer shell e of the device. By the same operation as in the third embodiment, the signals output from the acoustic sensors d1 and d11 can be used as received signals for sonar and acoustic communication that require formation of a narrow received beam. Further, since the two acoustic sensors d1 and d11 are sufficient as compared with the conventional underwater sonar, the configuration in the outer shell e becomes compact.
[0031]
【The invention's effect】
The receiving array of the present invention has (1) an acoustic opening that transmits an acoustic signal, a plurality of sound wave propagation paths for propagating a signal incident from the opening, and a plurality of sound wave propagation paths are assembled. In addition, a single sound wave propagation path communicating with each of these paths and an end of the single sound wave propagation path are received, and an acoustic signal propagated from the plurality of sound wave propagation paths is received, and an electric signal or optical signal is received. The basic configuration is to include an acoustic sensor that converts the signal into a signal. With this configuration, the output signal from the acoustic sensor propagates through the observation space and includes information on the sound wave at any position that has propagated to each acoustic aperture, so a narrow received beam must be formed. It can be used as a received signal for sonar and acoustic communication. In addition, since there is no need to arrange a sound pressure sensor in each acoustic opening, the number of sound pressure sensors can be reduced, and the number of receiving amplifiers and signal processing hardware is also reduced. Can be miniaturized.
[0032]
In (2) of the present invention, in the invention of (1) above, the single sound wave propagation path and the system of acoustic sensors are composed of two systems, so that the output signal from each acoustic sensor has a different waveform, In addition to the effect of (1), the amount of information can be further increased.
[0033]
In (3) of the present invention, in the invention of (1) above, a plurality of systems composed of a sound wave propagation path having a plurality of acoustic openings and a single sound wave propagation path and an acoustic sensor are combined, Since the number of acoustic openings is larger than in the case of (1) and the spatial range for detecting the sound wave propagating through the space can be expanded, the received beam is narrower than that of (1). Can be formed.
[0034]
In (4) of the present invention, in the invention of (3) above, since the receiving array is arranged in the container, the output signal from the acoustic sensor is received for a sonar that requires a narrower receiving beam. It can be used as a wave signal or a received signal for acoustic communication.
[Brief description of the drawings]
FIGS. 1A and 1B show a wave receiving array according to a first embodiment of the present invention, where FIG. 1A is a diagram showing propagation of sound waves, and FIG. 1B is a side view of the wave receiving array.
2A and 2B show a wave receiving array according to a second embodiment of the present invention, in which FIG. 2A is a diagram showing propagation of sound waves, and FIG. 2B is a side view of the wave receiving array.
FIGS. 3A and 3B show a wave receiving array according to a third embodiment of the present invention, in which FIG. 3A is a diagram showing propagation of sound waves, and FIG. 3B is a side view of the wave receiving array;
FIG. 4 is a front view of a receiving array according to a fourth embodiment of the present invention.
FIG. 5 is a side view of a receiving array according to a fourth embodiment of the present invention.
[Explanation of symbols]
a1, a2, a3 Acoustic openings a11, a12, a13 Acoustic openings b1, b2, b3 Sound propagation paths b11, b12, b13 Sound propagation paths c1, c11 Sound propagation paths d1, d2, d11 Acoustic sensor e Sound wave
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30711298A JP3716110B2 (en) | 1998-10-28 | 1998-10-28 | Receiving array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30711298A JP3716110B2 (en) | 1998-10-28 | 1998-10-28 | Receiving array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000134689A JP2000134689A (en) | 2000-05-12 |
| JP3716110B2 true JP3716110B2 (en) | 2005-11-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30711298A Expired - Fee Related JP3716110B2 (en) | 1998-10-28 | 1998-10-28 | Receiving array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3716110B2 (en) |
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1998
- 1998-10-28 JP JP30711298A patent/JP3716110B2/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| JP2000134689A (en) | 2000-05-12 |
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