JP2000147118A - Metering fish finder - Google Patents

Metering fish finder

Info

Publication number
JP2000147118A
JP2000147118A JP10318952A JP31895298A JP2000147118A JP 2000147118 A JP2000147118 A JP 2000147118A JP 10318952 A JP10318952 A JP 10318952A JP 31895298 A JP31895298 A JP 31895298A JP 2000147118 A JP2000147118 A JP 2000147118A
Authority
JP
Japan
Prior art keywords
pulse width
signal
fish
transmission
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10318952A
Other languages
Japanese (ja)
Other versions
JP3930166B2 (en
Inventor
Takahiro Sato
貴裕 佐藤
Original Assignee
Kaijo Corp
株式会社カイジョー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaijo Corp, 株式会社カイジョー filed Critical Kaijo Corp
Priority to JP31895298A priority Critical patent/JP3930166B2/en
Publication of JP2000147118A publication Critical patent/JP2000147118A/en
Application granted granted Critical
Publication of JP3930166B2 publication Critical patent/JP3930166B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88Sonar systems specially adapted for specific applications
    • G01S15/96Sonar systems specially adapted for specific applications for locating fish
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06Systems determining the position data of a target
    • G01S15/08Systems for measuring distance only
    • G01S15/10Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/102Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics
    • G01S15/108Systems for measuring distance only using transmission of interrupted, pulse-modulated waves using transmission of pulses having some particular characteristics using more than one pulse per sonar period

Abstract

PROBLEM TO BE SOLVED: To obtain a metering fish finder by which data on the distribution density or the like of a fish school can be acquired in a short time and with high accuracy. SOLUTION: A transmission part 1 is formed as a circuit which generates a transmission signal SS having a pulse width designated by a pulse-width changeover control signal PWSC. A pulse-width changeover control part 9 which generates a pulse-width changeover control signal PWSC used to automatically change over a short pulse width and a long pulse width alternately is installed. A signal separator 5 which separates the output of a reception part 4 into a short pulse-width signal component and a long pulse-width signal component is installed. The short pulse-width signal component is supplied to a single- body echo processing part 6. The long pulse-width signal component is supplied to a group-body echo processing part 7. A volume scattering intensity SV per unit volume which is found by its group-body echo signal processing part 71 is divided by an average target strength TS from the single-body echo processing part 6, and the distribution density (n) of a fish school is found.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】本発明は計量魚群探知機に関
し、特に単体魚の大きさやその数、魚群の分布密度など
を把握することができて、水産資源調査に必要不可欠な
計量魚群探知機に属する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing fish finder, and more particularly to a weighing fish finder which is capable of ascertaining the size and number of single fish, the distribution density of fish schools, and the like, and which is indispensable for fishery resource surveys. .
【0002】[0002]
【従来の技術】水産資源を調査するには、魚一匹一匹の
大きさやその数、魚群の大きさやその魚群に含まれる魚
の大きさ、密度などを把握する必要がある。このような
諸データは、魚に関する数多くの音響的特性等の研究成
果に基づいて設計、製作された計量魚群探知機により、
得ることができる。このような計量魚群探知機の代表的
な第1の例のブロック図を図2に示す。この計量魚群探
知機は、予め定められたパルス幅の送信信号SSを予め
定められた時間間隔で発生し出力する送信部1xと、こ
の送信部1xからの送信信号SSに基づく送波パルスを
海中に放射してその反射波を受波し、受信信号RSとし
て出力する送受切換部2及び送受波器3と、受信信号R
Sを増幅、検波して出力する受信部4と、この受信部4
の出力信号から、単体エコー部分を抽出して単体魚のタ
ーゲットストレングス(TS)や数、平均ターゲットス
トレングス(Ts)等から成る単体魚データEEDを出
力する一方、単体エコーを含む画像信号EEVを出力す
る単体エコー処理部6と、受信部4の出力信号を積分処
理して魚群の1立方メートル当りの平均体積散乱強度
(Sv)を含む群体推定信号GESを生成するエコー積
分・信号処理部11、及び平均体積散乱強度(Sv)を
平均ターゲットストレングス(Ts)で除算して得られ
た魚群の分布密度(n)を含む群体データGDを算出し
て出力する群体データ演算処理部72xを備えた群体推
定処理部10と、単体エコー処理部6からの画像信号E
EV及び単体魚データEED、並びに群体推定処理部1
0からの群体推定信号GES及び群体データGDに基づ
いて、予め定められた表示形式の魚探画像を表示する表
示部8xを有する構成となっている。
2. Description of the Related Art In order to investigate marine resources, it is necessary to grasp the size and number of fish, the size of fish schools, and the size and density of fish contained in the fish schools. Such data are collected and measured by a weighing fish finder that is designed and manufactured based on the research results of many acoustic characteristics of fish.
Obtainable. FIG. 2 shows a block diagram of a first representative example of such a weighing fish finder. The weighing fish finder transmits underwater a transmission unit 1x that generates and outputs a transmission signal SS having a predetermined pulse width at a predetermined time interval, and a transmission pulse based on the transmission signal SS from the transmission unit 1x. , A transmission / reception switching unit 2 and a transmission / reception unit 3 for receiving the reflected wave and outputting it as a reception signal RS;
A receiver 4 for amplifying, detecting and outputting S;
A single fish portion is extracted from the output signal to output single fish data EED including the target strength (TS) and the number of the single fish, the average target strength (Ts), etc., while outputting the image signal EEV including the single echo. A single echo processing unit 6, an echo integration / signal processing unit 11, which integrates an output signal of the receiving unit 4 to generate a colony estimation signal GES including an average volume scattering intensity (Sv) per cubic meter of a school of fish, and an average A swarm estimation process including a swarm data calculation processing unit 72x that calculates and outputs swarm data GD including a distribution density (n) of fish schools obtained by dividing the volume scattering intensity (Sv) by the average target strength (Ts). Unit 10 and the image signal E from the single echo processing unit 6
EV and single fish data EED, and colony estimation processing unit 1
It is configured to have a display unit 8x for displaying a fish finder image in a predetermined display format based on the group estimation signal GES from 0 and the group data GD.
【0003】単体魚のターゲットストレングスTSは、
送信信号レベル、送波感度、受波感度、指向角、深度等
の諸元や、受信信号レベル等に基づいて算出することが
でき、受信部4の出力信号を積分処理してその信号レベ
ルや、単体魚のターゲットストレングス算出諸元と同様
の諸元に基づいて、単位体積当りの平均体積散乱強度S
vを求めることができる。また、魚体長換算に関する諸
元に基づいて、ターゲットストレングスから魚体長を算
出することができる。
[0003] The target strength TS of a single fish is
It can be calculated on the basis of specifications such as a transmission signal level, transmission sensitivity, reception sensitivity, directivity angle, depth, and the like, and a reception signal level. , The average volume scattering intensity per unit volume based on the same parameters as the target strength calculation parameters for a single fish.
v can be obtained. Further, the fish length can be calculated from the target strength on the basis of the specifications relating to the fish length conversion.
【0004】図3は、パルス幅τの送波パルスを、指向
角θで海中に放射したときの、時刻t1における探知範
囲を示す図である。時刻t1における探知範囲EFGH
内に魚が一匹のみ存在する場合に、単体エコーとして抽
出することができ、単体魚のターゲットストレングスT
Sを求めことができる。また、魚がABCDの範囲に分
布しいる場合(魚群の場合)、分布が疎で一様ランダム
と見なせないときには、探知範囲EFGH内に入る魚の
数は変化し、個々の魚からの反射による基本成分の他
に、他の魚による干渉成分が現れて、これら基本成分及
び干渉成分共大きく変化し(あばれが大)、かつ干渉成
分が無視できなくなって、正確な単体魚データ(TS
等)が得られなくなる。従って、単体魚データの取得に
は、送波パルス(送信信号TX)のパルス幅が短い方
(例えば0.6ms程度)が有利である。
FIG. 3 is a diagram showing a detection range at time t1 when a transmission pulse having a pulse width τ is emitted into the sea at a directional angle θ. Detection range EFGH at time t1
When there is only one fish in the fish, it can be extracted as a single echo, and the target strength T of the single fish can be extracted.
S can be obtained. Further, when fish are distributed in the ABCD range (in the case of a school of fish), when the distribution is sparse and cannot be regarded as uniformly random, the number of fish entering the detection range EFGH changes, and In addition to the basic component, an interference component due to another fish appears, the basic component and the interference component greatly change (large turbulence), and the interference component cannot be ignored, so that accurate single fish data (TS
Etc.) cannot be obtained. Therefore, to acquire single fish data, it is advantageous that the pulse width of the transmission pulse (transmission signal TX) is shorter (for example, about 0.6 ms).
【0005】魚群の分布が密の場合には、一様ランダム
と見なすことができ、干渉成分を無視することができ、
また、基本成分もならされて、あばれも小さくなる。す
なわち、群体エコーのデータ取得には送波パルスのパル
ス幅が長い方(例えば1.2〜1.4ms程度)が有利であ
る。しかし、魚群の場合の、短いパルス幅によるときで
も、多数回の送受信を行ってその平均処理を行うことに
より、一様ランダムと見なすことができ、干渉成分が無
視できるようになって基本成分のみとなり、正確な群体
エコーのデータを取得できるようになる。これがエコー
積分の原理であり、この計量魚群探知機の群体推定処理
部10に相当する。短いパルス幅の送波パルスを用いて
群体エコーデータを得るには、多数回の送受信を行う必
要があるため、時間が長くなる。そこで、群体エコーデ
ータを取得する場合には、長いパルス幅の送波パルスを
用いるようにした例がある。このような例(従来の第2
の例)の計量魚群探知機のブロック図を図4に示す。
[0005] When the school of fish is densely distributed, it can be regarded as uniformly random, and the interference component can be ignored.
In addition, the basic components are smoothed out, and the rash is reduced. That is, it is advantageous that the pulse width of the transmission pulse is longer (for example, about 1.2 to 1.4 ms) for acquiring the data of the group echo. However, even in the case of a school of fish, even with a short pulse width, by performing transmission and reception many times and averaging it, it can be regarded as uniformly random, the interference component can be ignored, and only the basic component Thus, it is possible to obtain accurate data of the colony echo. This is the principle of echo integration, and corresponds to the colony estimation processing unit 10 of this weighing fish finder. In order to obtain colony echo data using a transmission pulse having a short pulse width, it is necessary to perform transmission and reception many times, so that the time becomes long. Therefore, there is an example in which a transmission pulse having a long pulse width is used when acquiring group echo data. Such an example (conventional second
FIG. 4 shows a block diagram of the weighing fish finder of Example 2).
【0006】この計量魚群探知機は、単体魚データEE
Dを取得する期間には短いパルス幅を指定し、群体デー
タを取得するときには長いパルス幅を指定するパルス幅
切換信号PWSを発生するパルス幅切換部21と、パル
ス幅切換信号PWSが指定するパルス幅の送信信号SS
を発生する送信部1yと、前述の第1の例と同様の送受
切換部2、送受波器3及び受信部4と、パルス幅切換信
号PWSが短いパルス幅を指定する期間に活性化し第1
の例6と同様の動作をする単体エコー処理部6と、平均
ターゲットストレングスTsを記憶しておきパルス幅切
換信号PWSが長パルス指定時に読出すTsメモリ22
と、パルス幅切換信号PWSが長パルス指定時に活性化
し、受信部4の出力信号に基づいて、魚群の1平方メー
トル当りの体積散乱強度(SV)を含む群体エコー処理
信号GEPを生成する群体エコー信号処理部71、及び
体積散乱強度SVをTsメモリ22からの平均ターゲッ
トストレングスTsで除算して得られた魚群の分布密度
(n)を含む群体データGDを算出する群体データ演算
処理部72yを備えた群体エコー処理部7yと、第1の
例と同様の表示部8yとを有する構成となっている。こ
の第2の例では、群体データGDを、長いパルス幅の送
波パルスを用いて取得しているので、そのための送受信
回数を第1の例より少なくし、かつあばれの少ない、よ
り正確な体積散乱強度SVを得ることができる。
[0006] This weighing fish finder is a single fish data EE
A pulse width switching unit 21 that generates a pulse width switching signal PWS that specifies a short pulse width during the period of acquiring D, and specifies a long pulse width when acquiring group data, and a pulse that is specified by the pulse width switching signal PWS. Transmission signal SS of width
, A transmission / reception switching unit 2, a transmitter / receiver 3, and a reception unit 4 similar to those in the first example described above, and a pulse width switching signal PWS activated during a period in which a short pulse width is specified.
And the Ts memory 22 which stores the average target strength Ts and reads out the pulse width switching signal PWS when the long pulse is designated.
And the pulse width switching signal PWS is activated when a long pulse is designated, and based on the output signal of the receiving unit 4, a colony echo signal for generating a colony echo processing signal GEP including the volume scattering intensity (SV) per square meter of the fish school. A processing unit 71, and a colony data operation processing unit 72y that calculates the colony data GD including the distribution density (n) of the fish school obtained by dividing the volume scattering intensity SV by the average target strength Ts from the Ts memory 22. It has a configuration including a group echo processing unit 7y and a display unit 8y similar to the first example. In the second example, since the group data GD is acquired by using a transmission pulse having a long pulse width, the number of times of transmission and reception for this is made smaller than that of the first example, and a more accurate volume with less irregularity is obtained. The scattering intensity SV can be obtained.
【0007】[0007]
【発明が解決しようとする課題】上述した従来の計量魚
群探知機は、第1の例では、単体魚データEED及び群
体データGDの両方を、単体魚データEEDを取得に有
利な短いパルス幅の信号を用い、この場合、魚群の分布
状態によって受信信号のあばれが大きく、かつ干渉成分
が無視できなくなるため、魚群の体積散乱強度を求める
際に多数回の送受信を行ってそれを積分処理し、あばれ
や干渉成分の影響を除去する必要があり、群体データG
Dの取得に要する時間が長くなる、という問題点があ
り、また、第2の例では、単体魚データEEDは短パル
スを用い、群体データGDは長パルスを用いて取得する
ようにしているので、短パルス及び長パルスそれぞれの
特長を生かし、かつ、魚群の体積散乱強度を短時間に正
確に得ることができるものの、単体魚データEEDの取
得と、群体データGDの取得とは別々に行われるため、
パルス幅の切換えなどの操作上の繁雑さがある上、魚群
の分布密度を求める際の、平均ターゲットストレングス
及び体積散乱強度それぞれを取得する際の時間的空間的
なずれが大きく、刻々変化する魚群に対する、その分布
密度の精度が低下するという問題点がある。
In the first example, the conventional weighing fish finder described above uses, in the first example, both the single fish data EED and the school data GD with a short pulse width which is advantageous for acquiring the single fish data EED. Using a signal, in this case, the unevenness of the received signal is large due to the distribution state of the fish school, and the interference component can not be ignored, so when calculating the volume scattering intensity of the fish school, perform transmission and reception many times and integrate it, It is necessary to remove the influence of turbulence and interference components.
There is a problem that the time required to acquire D is long, and in the second example, the single fish data EED is acquired using short pulses, and the group data GD is acquired using long pulses. Although the characteristics of the short pulse and the long pulse can be utilized and the volume scattering intensity of the fish school can be accurately obtained in a short time, the acquisition of the single fish data EED and the acquisition of the colony data GD are performed separately. For,
In addition to the operational complexity such as switching of pulse widths, the temporal and spatial shifts in obtaining the average target strength and volume scattering intensity when obtaining the distribution density of the school of fish are large, and the fish school changes every moment. However, there is a problem that the accuracy of the distribution density is reduced.
【0008】本発明の目的は、上記従来技術の問題点に
鑑みて、短時間に、精度の高い単体魚データ及び群体デ
ータを容易に取得することができる計量魚群探知機を提
供することにある。
An object of the present invention is to provide a weighing fish finder capable of easily obtaining highly accurate single fish data and school data in a short time in view of the above-mentioned problems of the prior art. .
【0009】[0009]
【課題を解決するための手段】本発明の計量魚群探知機
は、上記の目的を達成するために次の各構成を有するこ
とを特徴とする。 (イ)パルス幅切換制御信号が指定するパルス幅の送信
信号を、予め定められた時間間隔で発生する送信部 (ロ)前記送信部が発生する送信信号のパルス幅を、予
め定められた短いパルス幅と長いパルス幅に予め定めら
れた順序で指定する、前記パルス幅切換制御信号を発生
するパルス幅切換制御部 (ハ)前記送信部からの送信信号に基づく送波パルスを
水中に放射し、その反射波を受波して受信信号を出力す
る送受波器 (ニ)前記送受波器からの受信信号を増幅検波して出力
する受信部 (ホ)前記パルス幅切換制御部からのパルス幅切換制御
信号に基づいて、前記受信部の出力信号を短パルス幅信
号成分と長パルス幅信号成分とに分離する信号分離部 (ヘ)前記信号分離部からの短パルス幅信号成分に基づ
いて、単体魚のターゲットストレングスと、魚群中の単
体平均ターゲットストレングスとを含む単体魚データを
生成し出力する単体エコー処理部 (ト)前記信号分離部からの長パルス幅信号成分に基づ
いて、魚群の単位体積当りの体積散乱強度を算出し、こ
の体積散乱強度を前記単体平均ターゲットストレングス
で除算した魚群の分布密度を含む魚群データを生成し出
力する群体エコー処理部 (チ)前記単体エコー処理部からの単体魚データと、前
記群体エコー処理部からの魚群データとを、予め定めら
れた表示形式で表示する表示部
A weighing fish finder according to the present invention has the following features to achieve the above object. (B) A transmission section that generates a transmission signal having a pulse width designated by a pulse width switching control signal at a predetermined time interval. (B) A transmission section that generates a transmission signal having a predetermined short pulse width. A pulse width switching control unit for generating the pulse width switching control signal, which is designated in a predetermined order to a pulse width and a long pulse width; and (c) radiating a transmission pulse based on a transmission signal from the transmission unit into water. A transducer for receiving the reflected wave and outputting a received signal; (d) a receiver for amplifying, detecting, and outputting the received signal from the transducer; and (e) a pulse width from the pulse width switching controller. A signal separation unit that separates an output signal of the reception unit into a short pulse width signal component and a long pulse width signal component based on a switching control signal; (f) based on a short pulse width signal component from the signal separation unit; Single fish target A single echo processing unit for generating and outputting single fish data including a length and a single average target strength in a fish school (g) Based on a long pulse width signal component from the signal separation unit, a volume per unit volume of the fish school A school echo processing unit that calculates scattering intensity and generates and outputs fish school data including the distribution density of fish schools obtained by dividing the volume scattering intensity by the single average target strength. (H) The single fish data from the single echo processing unit and A display unit for displaying the fish school data from the colony echo processing unit in a predetermined display format
【0010】また、前記パルス幅切換制御部が、予め定
められた短いパルス幅と長いパルス幅に交互に指定する
パルス幅切換制御信号を発生するようにして構成され
る。
The pulse width switching control section is configured to generate a pulse width switching control signal alternately designating a predetermined short pulse width and a long pulse width.
【0011】[0011]
【発明の実施の形態】本発明の一実施の形態は、まず、
送信部から、パルス幅を、短いパルス幅と長いパルス幅
に交互に、または予め定められた順序で自動的に切換え
た送信信号を発生して送受波器から水中に放射し、その
反射波による受信信号を、短いパルス幅の信号と長いパ
ルス幅の信号に分離する。そして、短いパルス幅の信号
により、魚群中の単体魚の平均ターゲットストレングス
等を求め、長いパルス幅の信号により魚群の単位体積当
りの体積散乱強度等を求め、この体積散乱強度を上記の
平均ターゲットストレングスで除算して、魚群の分布密
度等を算出する構成となっている。従って、単体魚に対
するデータは短いパルス幅により、魚群の体積散乱強度
等は長いパルス幅により取得することができるのでこれ
らを短時間にかつ精度よく取得することができ、かつこ
れらは同時に平行して行われるので、時々刻々変化する
魚群に対し、その分布密度等のデータを、高い精度で取
得することができる。また、パルス幅の切換えは自動的
に行われるので、操作も単純で容易となる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is as follows.
From the transmitting unit, the pulse width is alternately changed to a short pulse width and a long pulse width, or a transmission signal automatically switched in a predetermined order is generated and radiated into the water from the transducer, and the reflected wave The received signal is separated into a short pulse width signal and a long pulse width signal. Then, an average target strength or the like of a single fish in the school of fish is obtained from a signal with a short pulse width, and a volume scattering intensity per unit volume of the school of fish is obtained from a signal with a long pulse width. , And the distribution density of the school of fish is calculated. Therefore, the data for a single fish can be obtained with a short pulse width, and the volume scattering intensity and the like of a school of fish can be obtained with a long pulse width. Since it is performed, data such as the distribution density can be acquired with high accuracy for a school of fish that changes from moment to moment. Further, since the pulse width is automatically switched, the operation is simple and easy.
【0012】[0012]
【実施例】次に本発明の実施例について図面を参照して
説明する。図1は本発明の一実施例を示すブロック図で
ある。この実施例は、パルス幅切換制御信号PWSCが
指定するパルス幅の送信信号SSを、予め定められた時
間間隔で発生する送信部1と、この送信部1が発生する
送信信号SSのパルス幅を、予め定められた短いパルス
幅τ1と長いパルス幅τ2に自動的に交互に指定するた
めのパルス幅切換制御信号PWSCを発生するパルス幅
切換制御部9と、従来の計量魚群探知機(以下、従来例
という)と同様の(図2、図4)機能をはたす送受切換
部2、送受波器3、及び受信部4と、パルス幅切換制御
信号PWSCに基づいて受信部4の出力信号を短いパル
ス幅τ1の信号成分(以下、短パルス幅信号成分とい
う)と長いパルス幅τ2の信号成分(以下、長パルス幅
信号成分という)とに分離する信号分離部5と、信号分
離部5からの短パルス幅信号成分に基づいて、従来例と
同様に単体魚のターゲットストレングスTSやその数、
及び平均ターゲットストレングスTsを含む単体魚デー
タEED、単体魚を含む画像信号EEVを生成し出力す
る単体エコー処理部6と、信号分離部5からの長パルス
幅信号成分に基づいて、魚群の1立方メートル当りの体
積散乱強度SVを含む群体エコー処理信号GEPを生成
する群体エコー信号処理部71、及び体積散乱強度SV
を平均ターゲットストレングスTsで除算して得られた
魚群の分布密度nを含む群体データGDを算出する群体
データ演算処理部72を備えた群体エコー処理部7と、
従来例と同様の表示部8とを有する構成となっている。
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the present invention. In this embodiment, a transmission unit 1 that generates a transmission signal SS having a pulse width designated by a pulse width switching control signal PWSC at a predetermined time interval, and a pulse width of the transmission signal SS generated by the transmission unit 1 A pulse width switching control unit 9 for generating a pulse width switching control signal PWSC for automatically and alternately specifying a predetermined short pulse width τ1 and a long pulse width τ2, and a conventional weighing fish finder (hereinafter, referred to as The transmission / reception switching unit 2, the transmitter / receiver 3, and the reception unit 4 having the same function as that of the conventional example (FIGS. 2 and 4) and the output signal of the reception unit 4 are shortened based on the pulse width switching control signal PWSC. A signal separating unit 5 for separating a signal component having a pulse width τ1 (hereinafter referred to as a short pulse width signal component) and a signal component having a long pulse width τ2 (hereinafter referred to as a long pulse width signal component); Short pulse width signal Min based, target strength TS and the number thereof in the conventional example as well as single fish,
A single fish data EED including the average target strength Ts, a single echo processing unit 6 for generating and outputting an image signal EEV including the single fish, and a cubic meter of fish based on the long pulse width signal component from the signal separation unit 5 A colony echo signal processing section 71 for generating a colony echo processing signal GEP including a per volume scattering intensity SV, and a volume scattering intensity SV
Is divided by the average target strength Ts, and a colony echo processing unit 7 including a colony data calculation processing unit 72 that calculates the colony data GD including the distribution density n of the fish school,
It has a configuration including a display unit 8 similar to the conventional example.
【0013】この実施例においては、単体魚の個々のタ
ーゲットストレングスTSや平均ターゲットストレング
スTsを含む単体魚に関するデータ(EED)は、短パ
ルス幅信号成分より取得し、魚群の1立方メートル当り
の体積散乱強度SVを含む魚群に関するデータ(GEP
等)は長パルス幅信号成分より取得する。従って、それ
ぞれのデータは精度が高く、また、体積散乱強度SV等
の取得も短時間で済ませることができる。しかも、単体
魚に関するデータの取得と、魚群に関するデータの取得
とが同時に平行して行われるので、時々刻々分布状態等
が変化する魚群に対し、平均ターゲットストレングスT
s取得時と体積散乱強度SV取得時との間の時間的、空
間的なずれが極めて少なく、魚群の分布密度nに対する
精度を上げることができる。また、パルス幅の切換えは
パルス幅切換制御部9により自動的に行われるので、従
来の第2の例のような繁雑なパルス幅の切換え操作を行
う必要がない。なお、短いパルス幅と長いパルス幅の切
換えは、交互でなく、短い期間内で、予め定められた順
序で切換えるようにしてもよい。
In this embodiment, data (EED) concerning individual fish including individual target strength TS and average target strength Ts of individual fish is obtained from short pulse width signal components, and the volume scattering intensity per cubic meter of the school of fish is obtained. Data on fish schools including SV (GEP
Etc.) are obtained from the long pulse width signal component. Therefore, each data has high accuracy, and the acquisition of the volume scattering intensity SV and the like can be completed in a short time. In addition, since the acquisition of data on a single fish and the acquisition of data on a school of fish are simultaneously performed at the same time, the average target strength T for a school of fish whose distribution state changes every moment.
Temporal and spatial deviations between the acquisition of s and the acquisition of the volume scattering intensity SV are extremely small, and the accuracy with respect to the distribution density n of the school of fish can be increased. Further, since the pulse width switching is automatically performed by the pulse width switching controller 9, there is no need to perform a complicated pulse width switching operation as in the second conventional example. Note that the switching between the short pulse width and the long pulse width may be performed in a predetermined order within a short period instead of alternately.
【0014】[0014]
【発明の効果】以上説明したように本発明は、送信部か
ら、短いパルス幅と長いパルス幅に、又は予め定められ
た順序で交互に自動的に切換えられた送信信号を発生し
て送受波器に供給し、送受波器からの受信信号を受信機
で処理した後、短いパルス幅の信号成分と長いパルス幅
の信号成分とに分けて、短いパルス幅の信号成分から、
ターゲットストレングスを含む単体魚に関するデータを
取得し、長いパルス幅の信号成分から、魚群の単位体積
当りの体積散乱強度を含む、魚群に関するデータを取得
する構成としたので、短いパルス幅、長いパルス幅の特
徴を生かして、短時間に精度の高いデータを得ることが
でき、中でも、これらは同時に平行して行われるので、
時々刻々その分布状態が変化する魚群に対しても、平均
ターゲットストレングス取得時と体積散乱強度取得時の
間の時間的、空間的なずれが極めて少なく、これらから
算出する魚群の分布密度に対し、高精度を保つことがで
き、しかも、パルス幅の切換えは自動的に行われるの
で、操作も単純、容易である、という効果がある。
As described above, according to the present invention, the transmitting and receiving section generates a transmission signal which is automatically switched to a short pulse width and a long pulse width or alternately in a predetermined order. After receiving the signal from the transmitter / receiver at the receiver, the signal is divided into a short pulse width signal component and a long pulse width signal component.
It is configured to acquire data on single fish including target strength and acquire data on fish school, including volume scattering intensity per unit volume of fish school, from signal components with long pulse width, so short pulse width, long pulse width By taking advantage of the features described above, highly accurate data can be obtained in a short time. Above all, since these are performed simultaneously in parallel,
Even for a school of fish whose distribution changes from moment to moment, the temporal and spatial deviation between the acquisition of the average target strength and the acquisition of the volume scattering intensity is extremely small, and the distribution density of the fish school calculated from these is highly accurate. In addition, since the pulse width is automatically switched, the operation is simple and easy.
【図面の簡単な説明】[Brief description of the drawings]
【図1】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing one embodiment of the present invention.
【図2】従来の計量魚群探知機の第1の例を示すブロッ
ク図である。
FIG. 2 is a block diagram showing a first example of a conventional weighing fish finder.
【図3】従来の計量魚群探知機で使用される信号のパル
ス幅に対する単体魚に関するデータ及び魚群に関するデ
ータの取得時の特徴を説明するための図である。
FIG. 3 is a diagram for explaining characteristics at the time of acquiring data on a single fish and data on a fish school with respect to a pulse width of a signal used in a conventional weighing fish finder.
【図4】従来の計量魚群探知機の第2の例を示すブロッ
ク図である。
FIG. 4 is a block diagram showing a second example of a conventional weighing fish finder.
【符号の説明】[Explanation of symbols]
1,1x,1y 送信部 2 送受切換部 3 送受波器 4 受信部 5 信号分離部 6 単体エコー処理部 7 群体エコー処理部 8,8x,8y 表示部 9 パルス幅切換制御部 10 群体推定処理部 11 エコー積分・信号処理部 21 パルス幅切換部 22 Tsメモリ 71,71y 群体エコー信号処理部 72,72x,72y 群体データ演算処理部 1, 1x, 1y transmission unit 2 transmission / reception switching unit 3 transmitter / receiver 4 reception unit 5 signal separation unit 6 simple echo processing unit 7 group echo processing unit 8, 8x, 8y display unit 9 pulse width switching control unit 10 group estimation processing unit Reference Signs List 11 echo integration / signal processing unit 21 pulse width switching unit 22 Ts memory 71, 71y group echo signal processing unit 72, 72x, 72y group data calculation processing unit

Claims (2)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 次の各構成を有することを特徴とする計
    量魚群探知機。 (イ)パルス幅切換制御信号が指定するパルス幅の送信
    信号を、予め定められた時間間隔で発生する送信部 (ロ)前記送信部が発生する送信信号のパルス幅を、予
    め定められた短いパルス幅と長いパルス幅に予め定めら
    れた順序で指定する、前記パルス幅切換制御信号を発生
    するパルス幅切換制御部 (ハ)前記送信部からの送信信号に基づく送波パルスを
    水中に放射し、その反射波を受波して受信信号を出力す
    る送受波器 (ニ)前記送受波器からの受信信号を増幅検波して出力
    する受信部 (ホ)前記パルス幅切換制御部からのパルス幅切換制御
    信号に基づいて、前記受信部の出力信号を短パルス幅信
    号成分と長パルス幅信号成分とに分離する信号分離部 (ヘ)前記信号分離部からの短パルス幅信号成分に基づ
    いて、単体魚のターゲットストレングスと、魚群中の単
    体平均ターゲットストレングスとを含む単体魚データを
    生成し出力する単体エコー処理部 (ト)前記信号分離部からの長パルス幅信号成分に基づ
    いて、魚群の単位体積当りの体積散乱強度を算出し、こ
    の体積散乱強度を前記単体平均ターゲットストレングス
    で除算した魚群の分布密度を含む魚群データを生成し出
    力する群体エコー処理部 (チ)前記単体エコー処理部からの単体魚データと、前
    記群体エコー処理部からの魚群データとを、予め定めら
    れた表示形式で表示する表示部
    1. A weighing fish finder having the following components. (B) A transmission section that generates a transmission signal having a pulse width designated by a pulse width switching control signal at a predetermined time interval. (B) A transmission section that generates a transmission signal having a predetermined short pulse width. A pulse width switching control unit for generating the pulse width switching control signal, which is designated in a predetermined order to a pulse width and a long pulse width; and (c) radiating a transmission pulse based on a transmission signal from the transmission unit into water. A transducer for receiving the reflected wave and outputting a received signal; (d) a receiver for amplifying, detecting, and outputting the received signal from the transducer; and (e) a pulse width from the pulse width switching controller. A signal separation unit that separates an output signal of the reception unit into a short pulse width signal component and a long pulse width signal component based on a switching control signal; (f) based on a short pulse width signal component from the signal separation unit; Single fish target A single echo processing unit for generating and outputting single fish data including a length and a single average target strength in a fish school (g) Based on a long pulse width signal component from the signal separation unit, a volume per unit volume of the fish school A school echo processing unit that calculates scattering intensity and generates and outputs fish school data including the distribution density of fish schools obtained by dividing the volume scattering intensity by the single average target strength. (H) The single fish data from the single echo processing unit and A display unit for displaying the fish school data from the colony echo processing unit in a predetermined display format
  2. 【請求項2】 パルス幅切換制御部が、予め定められた
    短いパルス幅と長いパルス幅に交互に指定するパルス幅
    切換制御信号を発生する請求項1記載の計量魚群探知
    機。
    2. The weighing fish finder according to claim 1, wherein the pulse width switching control unit generates a pulse width switching control signal alternately designating a predetermined short pulse width and a long pulse width.
JP31895298A 1998-11-10 1998-11-10 Weighing fish finder Expired - Lifetime JP3930166B2 (en)

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Application Number Priority Date Filing Date Title
JP31895298A JP3930166B2 (en) 1998-11-10 1998-11-10 Weighing fish finder

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JP2000147118A true JP2000147118A (en) 2000-05-26
JP3930166B2 JP3930166B2 (en) 2007-06-13

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ID=18104831

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Country Link
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006105700A (en) * 2004-10-01 2006-04-20 Furuno Electric Co Ltd Underwater detection device for information of shoal of fish capable of computing volume of shoal of fish and back scatter of individual fish and its method
JP2011226878A (en) * 2010-04-19 2011-11-10 Furuno Electric Co Ltd Ultrasonic detection apparatus, fish detection apparatus, ultrasonic detection method, and fish detection method
JP2012026855A (en) * 2010-07-23 2012-02-09 Furuno Electric Co Ltd Hydrospace detection apparatus, fish shoal detection apparatus, hydrospace detection method, and fish shoal detection method
JP2012225667A (en) * 2011-04-15 2012-11-15 Furuno Electric Co Ltd Ultrasonic transceiver, detection method for fixed quantity and detection method for fish amount
JP2012229963A (en) * 2011-04-26 2012-11-22 Furuno Electric Co Ltd Target length measurement device, target length measurement method, and target length measurement program
JP2016205933A (en) * 2015-04-20 2016-12-08 古野電気株式会社 Hydrospace detector
EP3153884A1 (en) * 2015-10-06 2017-04-12 Furuno Electric Company Limited Detection apparatus, fish finder, and radar
RU178905U1 (en) * 2018-01-10 2018-04-23 Общество с ограниченной ответственностью "Конструкторское бюро морской электроники "Вектор" MULTI-BEAM SCIENTIFIC ECHO SOUNDER FOR ACCOUNTING WATER BIORESOURCES

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006105700A (en) * 2004-10-01 2006-04-20 Furuno Electric Co Ltd Underwater detection device for information of shoal of fish capable of computing volume of shoal of fish and back scatter of individual fish and its method
JP2011226878A (en) * 2010-04-19 2011-11-10 Furuno Electric Co Ltd Ultrasonic detection apparatus, fish detection apparatus, ultrasonic detection method, and fish detection method
JP2012026855A (en) * 2010-07-23 2012-02-09 Furuno Electric Co Ltd Hydrospace detection apparatus, fish shoal detection apparatus, hydrospace detection method, and fish shoal detection method
JP2012225667A (en) * 2011-04-15 2012-11-15 Furuno Electric Co Ltd Ultrasonic transceiver, detection method for fixed quantity and detection method for fish amount
JP2012229963A (en) * 2011-04-26 2012-11-22 Furuno Electric Co Ltd Target length measurement device, target length measurement method, and target length measurement program
JP2016205933A (en) * 2015-04-20 2016-12-08 古野電気株式会社 Hydrospace detector
EP3153884A1 (en) * 2015-10-06 2017-04-12 Furuno Electric Company Limited Detection apparatus, fish finder, and radar
EP3153881A1 (en) * 2015-10-06 2017-04-12 Furuno Electric Company Limited Detection apparatus, fish finder, and radar
US10247826B2 (en) 2015-10-06 2019-04-02 Furuno Electric Company Limited Detection apparatus, fish finder, and radar
RU178905U1 (en) * 2018-01-10 2018-04-23 Общество с ограниченной ответственностью "Конструкторское бюро морской электроники "Вектор" MULTI-BEAM SCIENTIFIC ECHO SOUNDER FOR ACCOUNTING WATER BIORESOURCES

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