JPH0167588U - - Google Patents
Info
- Publication number
- JPH0167588U JPH0167588U JP1987163384U JP16338487U JPH0167588U JP H0167588 U JPH0167588 U JP H0167588U JP 1987163384 U JP1987163384 U JP 1987163384U JP 16338487 U JP16338487 U JP 16338487U JP H0167588 U JPH0167588 U JP H0167588U
- Authority
- JP
- Japan
- Prior art keywords
- phase difference
- fan
- difference detection
- axis
- fish
- 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
Links
- 241000251468 Actinopterygii Species 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 6
Description
第１図は本考案の魚体長判別用魚群探知機の実
施例のブロツク図、第２図は実施例の受波器の構
成図、第３図は位相差検出の説明図、第４図は従
来の送受波器の指向特性の一例を示す図、第５図
はクロスフアンビームの断面の強度分布図、第６
図は従来のクロスフアンビームによる魚体長測定
用魚群探知機のブロツク図である。
１……送波器、２……受波器、３……送信部、
４……受信部、５……表示器、６……Ｙ１受信部
、７……Ｙ２受信部、８……Ｘ１受信部、９……
Ｘ２受信部、１０……Ｙ軸位相差検出部、１１…
…Ｘ軸位相差検出部、１２……位相ゲート部、１
３―１〜１３―７……超音波振動子、１４……Ｘ
２受波器の中心軸、１５……Ｘ１受波器の中心軸
、１６……Ｘ軸受波器全体の中心軸、１７……サ
イドローブ、１８……メインローブのサイド、１
９……公称指向幅（角）、２０……メインローブ
、２１……Ｘ１受波器、２２……Ｘ２受波器、２
３……魚のいる方向。
Fig. 1 is a block diagram of an embodiment of the fish finder for determining fish body length of the present invention, Fig. 2 is a configuration diagram of the receiver of the embodiment, Fig. 3 is an explanatory diagram of phase difference detection, and Fig. 4 is A diagram showing an example of the directivity characteristics of a conventional transducer; Figure 5 is an intensity distribution diagram of a cross-sectional cross-fan beam;
The figure is a block diagram of a conventional fish finder for measuring fish body length using a cross fan beam. 1... Transmitter, 2... Receiver, 3... Transmitter,
4... Receiving section, 5... Display unit, 6... Y 1 receiving section, 7... Y 2 receiving section, 8... X 1 receiving section, 9...
X2 receiving section, 10... Y-axis phase difference detection section, 11...
...X-axis phase difference detection section, 12... Phase gate section, 1
3-1 to 13-7...Ultrasonic transducer, 14...X
2 Central axis of the receiver, 15...
9...Nominal directivity width (angle), 20...Main lobe, 21...X 1 receiver, 22...X 2 receiver, 2
3...The direction where the fish are.
Claims (1)
探知機において、指向軸が所定間隔離隔した２つ
の受波フアンビームと、１つの送波フアンビーム
とを形成するように複数の振動子が配列された送
波器と；該送波器が形成する送波フアンビームと
扇面が互いに直交し指向軸が所定間隔離隔した２
つまたは３つの受波フアンビームを形成するよう
に複数の振動子が配列された受波器と；目標物の
方向が前記送波フアンビームの中心軸となす角の
、扇面と直角をなす面における、角度成分を検出
するＹ軸位相差検出部と；目標物の方向が前記受
波器の受波フアンビームの１つの中心軸となす角
の、扇面と直角をなす面における、角度成分を検
出するＸ軸位相差検出部と；前記Ｘ軸位相差検出
部で検出された位相差と前記Ｙ軸位相差検出部で
検出された位相差とが所定の位相差範囲内にあれ
ばゲートを開きエコー信号を通過させる位相ゲー
ト部と；を具備することを特徴とする魚体長判別
用魚群探知機。 In a fish finder that uses crossed fan beams to detect fish, a plurality of transducers are arranged so as to form two receiving fan beams and one transmitting fan beam with directional axes separated by a predetermined distance. A transmitter; a transmitting fan beam formed by the transmitter and a fan surface that are perpendicular to each other and whose directional axes are spaced apart by a predetermined distance.
a receiver in which a plurality of transducers are arranged so as to form one or three receiving fan beams; a surface that is perpendicular to the fan surface at an angle that the direction of the target makes with the central axis of the transmitting fan beam; a Y-axis phase difference detection unit that detects an angular component; an X-axis phase difference detection section to detect; if the phase difference detected by the X-axis phase difference detection section and the phase difference detected by the Y-axis phase difference detection section are within a predetermined phase difference range, a gate is activated; A fish finder for determining fish body length, comprising: a phase gate section that allows an open echo signal to pass;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338487U JPH0648453Y2 (en) | 1987-10-26 | 1987-10-26 | Fish finder for fish length discrimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338487U JPH0648453Y2 (en) | 1987-10-26 | 1987-10-26 | Fish finder for fish length discrimination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0167588U true JPH0167588U (en) | 1989-05-01 |
| JPH0648453Y2 JPH0648453Y2 (en) | 1994-12-12 |
Family
ID=31448064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16338487U Expired - Lifetime JPH0648453Y2 (en) | 1987-10-26 | 1987-10-26 | Fish finder for fish length discrimination |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648453Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008232795A (en) * | 2007-03-20 | 2008-10-02 | Furuno Electric Co Ltd | Ultrasonic detector and ultrasonic detection method |
-
1987
- 1987-10-26 JP JP16338487U patent/JPH0648453Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008232795A (en) * | 2007-03-20 | 2008-10-02 | Furuno Electric Co Ltd | Ultrasonic detector and ultrasonic detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0648453Y2 (en) | 1994-12-12 |
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