JPH03231185A - Displaying apparatus of position of drifting object - Google Patents
Displaying apparatus of position of drifting objectInfo
- Publication number
- JPH03231185A JPH03231185A JP2026900A JP2690090A JPH03231185A JP H03231185 A JPH03231185 A JP H03231185A JP 2026900 A JP2026900 A JP 2026900A JP 2690090 A JP2690090 A JP 2690090A JP H03231185 A JPH03231185 A JP H03231185A
- Authority
- JP
- Japan
- Prior art keywords
- drifting object
- tide
- relative position
- current
- tidal current
- 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
- 238000005259 measurement Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000284 extract Substances 0.000 claims abstract description 3
- 238000000605 extraction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 description 33
- 238000010586 diagram Methods 0.000 description 6
- 239000002344 surface layer Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（ａｌ産業上の利用分野
この発明は、水中を漂流する漂流物体の位置を推測して
画面上に表示する漂２ｉｔ物***置表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an object position display device that estimates the position of a floating object floating in water and displays it on a screen.
（ｂｌ従来の技術
従来より、例えば巻網漁船等に適する漁拐電子機器とし
て、水中に投じた網や縄の位置を推測して画面上に表示
する漂流物***置表示装置（特願昭６２−２００７１０
号）を本願出願人が出願している。(bl Prior Art) A drifting object position display device (Patent Application No. 1983-1983) has been used as a fishing electronic device suitable for purse seine fishing boats, etc., which estimates the position of a net or rope cast into the water and displays it on the screen. 200710
No.) has been filed by the applicant.
上記漂流物***置表示装置は、漂流物体の存在する水域
の潮流の流向と流速を測定し、測定した潮流の流向と流
速および経過時間に基づいて漂流物体（網や縄）の位置
を推測し、これを画面表示するようにしたものである。The above-mentioned drifting object position display device measures the direction and speed of the tidal current in the water area where the drifting object exists, and estimates the position of the drifting object (net or rope) based on the measured direction and speed of the tidal current and the elapsed time. This is displayed on the screen.
（Ｃ）発明が解決しようとする課題
一般に、巻網等の水中に投じられた漁具は潮流によって
流されるため、潮流の状態を把握することによって巻網
等の位置を推測することは可能であり、上記出願の漂流
物***置表示装置によれば水中に投じた網等の形状を把
握する上で有効である。(C) Problems to be Solved by the Invention In general, fishing gear such as purse seine thrown into the water is washed away by the current, so it is possible to estimate the position of the purse seine etc. by understanding the state of the tidal current. According to the drifting object position display device of the above application, it is effective in grasping the shape of a net etc. cast into the water.
しかしながら、目的Ｓこよっては漂流物体の絶対ｒ：′
］な位置より、むしろ自部跡に対する漂流物体の相対的
な位置または漂流物体が間流Ｏこよって張力を受シナで
いる状態を知りたし・場合がある。即ち、水中の各深度
＠に潮流の流向と流速は異なるため、例えば張り下げろ
れたＶ４：よ、各７菜度毎２こ〈潮流に応して流さね、
ようとし、鋼の各部うこ張力が作用する。上記出願の漂
流物***置表示装置Ｃ二よって：よ、その表示内容だけ
から漂流物体（網等）乙こかかる張力を的確；こ把握す
ることは困蛇である。However, due to the purpose S, the absolute r of the drifting object:'
] Rather than the position of the drifting object, there are cases where we need to know the relative position of the drifting object with respect to its own trace, or the state in which the drifting object is receiving tension due to the intercurrent. In other words, the direction and speed of the current are different at each depth in the water, so for example, the lowered V4: 2 times every 7 degrees (flow according to the current).
As a result, tension acts on each part of the steel. According to the drifting object position display device C2 of the above-mentioned application, it is difficult to accurately grasp the tension exerted on a drifting object (such as a net) just from the displayed contents.
この発明の目的は、水中に投じられた網や縄等の漂流物
体の相対位置および漂流物体が（潮流Ｓこよって受けて
いる張力の様子を的確に把握できるようにじだ漂流物体
位置表示装置を堤供することにある。The purpose of this invention is to provide a drifting object position display device that can accurately grasp the relative position of a drifting object such as a net or rope thrown into the water, and the state of the tension that the drifting object is under due to the tidal current S. The purpose is to provide.
（ｄ１課題を解決するための手段
この発明の漂流物***置表示装置は、水中に対する超音
波の送波および深度の異なる設定した複数の各層かろの
反射波の受波により、各層における潮流の流向および流
速を計測する潮流計測手段と、
基準層の；！Ｊｌ流に対する、上記各層における潮流の
流向および流速の差を抽出する潮流差抽出手段と、
抽出された潮流差を計測開始からの経過時間分積算して
各深度にδ；する漂流物体の相対位置を推測する漂流物
体相対位置推測手段と、推測した漂流物体の位置を画面
上に表示する漂流物***置表示手段と、からなるａ流動
***置表示装置。(Means for Solving Problem d1) The drifting object position display device of the present invention transmits ultrasonic waves into the water and receives reflected waves from a plurality of layers set at different depths, thereby determining the direction of the tidal current in each layer. A tidal current measuring means for measuring the current velocity; A tidal current difference extraction means for extracting the difference in the direction and velocity of the tidal current in each of the above layers with respect to the ;!Jl flow in the reference layer; (a) A fluid body position comprising: a drifting object relative position estimating means for estimating the relative position of the drifting object by integrating δ at each depth; and a drifting object position display means for displaying the estimated position of the drifting object on a screen. Display device.
（ｅ）作用
この発明の漂流物***置表示装置−二おいては、潮流計
測手段は、水中に対する超音波の送波および深度の異な
る設定した複数の各層からの反射波の受波により、各層
における潮流の流向および流速を計測する。潮流差抽出
手段は、基準層の潮流；こ対する、各層にδける潮流の
流向および流速の差を抽出する。漂流物体相対位置推測
手段は、抽出された潮流差を計測開始からの経過時間分
だ：す積算することによって、各深度における漂流物体
の相対位置を推測する。更に漂流物***置表示手段は、
推測′−二漂流物体の位置を画面１乙こ表示づ二〇よう
乙こ二で、漂流物体の各位置にδ２する潮流差が計測さ
れ、その後の経過時間に応巳て推測された漂流物体の相
対位置関係が表示される。漂流物体の相対は置は時間経
過にともない移動じ、その動き；よ例え：！′投じられ
た網や通が潮流によって潮力を受けている様子を表示す
ることになる。(e) Function In the drifting object position display device-2 of the present invention, the tidal current measurement means transmits ultrasonic waves into the water and receives reflected waves from each of a plurality of layers set at different depths. Measure the direction and speed of tidal currents. The tidal current difference extraction means extracts the tidal current in the reference layer; and the difference in the direction and velocity of the tidal current in each layer by δ. The drifting object relative position estimating means estimates the relative position of the drifting object at each depth by integrating the extracted tidal current difference over the elapsed time from the start of measurement. Furthermore, the drifting object position display means is
Estimation - 2 The position of the drifting object is displayed on the screen 1 and 20. Then, the tidal current difference of δ2 at each position of the drifting object is measured, and the drifting object is estimated based on the elapsed time. The relative positional relationship of is displayed. The relative position of a drifting object moves as time passes; its movement; analogy:! 'It will show how the cast nets and channels are being affected by the tidal force due to the current.
（ｆ）実施例
まず、この発明の実施例で用いる一般的な潮）流計の構
成および測定方法をブロック図として第５図二二示す。(f) Embodiment First, the configuration and measurement method of a general tide meter used in an embodiment of the present invention is shown in FIG. 5-22 as a block diagram.
第５図において、３０は潮流計の制御回路部、その他の
ブロックは通常ディジタル計算機の演算処理；こより行
われる部分である。送信信号発生回路１は水中に送波す
べき超音波の信号を発生し、送信回路２．３および４は
その送信信号によって送受波器５，６および７を駆動す
る。これらの送受波器５．６および７は水平指向方向が
互いに１２０度づつ離れた方向で、一定の俯角で超音波
の送受波を行う。増幅回路３．９８よび１０は超音波送
受波器５，６δよび７の受波信号を増幅巳、周波数検出
回路１１．１２および１３は受渡信号のドツプラーシフ
トを検出する。サンプルゲート信号発生回路１４は設定
された深度からの反射波を抽出するゲート信号および海
底反射波を抽出するゲート信号をそれぞれ発生する。ま
た、同図においてブロック１５．ｉ６δよび１７はそれ
ぞれ設定深度からの反射波の周波数ＦＷおよび海底反射
波の周波数ＦＧを記憶する。ブロック１８て：ま３方向
の受波信号の周波数から自船の船首を基準とするＸ、Ｙ
座標系の対地速度（ＶＸＧ、ＶＹＧ）と設定深度に対す
る対水速度（Ｖχｗ、ｖｙＷ）をそれぞれ求める。また
、ブロック１９では、自船の船首を基準とするＸ、Ｙ座
標系の速度データとコンパス方位とに基づいて妾寺→勢
南北方向と東西方向について、それぞれ対地速度（ＮＳ
Ｇ、ＥＷＧ）と対水速度（Ｎ Ｓ Ｗ、 Ｅ ＷＷ）を
求める。更にブロック２０では、対水速度と対地速度と
の差から潮流の南北方向の速度Ｎ Ｓ Ｃおよび東西方
向の速度ＥＷＣを求める。なお、潮流の流速は一β丁Ｓ
Ｃ”〒コπ〒１−として求められ、流向はｊａｎ −’
（ＥＷＣ／ Ｎ Ｓ Ｃ）として求められる。In FIG. 5, reference numeral 30 indicates a control circuit section of the tidal current meter, and other blocks are sections that are normally performed by a digital computer's arithmetic processing. Transmission signal generation circuit 1 generates an ultrasonic signal to be transmitted underwater, and transmission circuits 2.3 and 4 drive transducers 5, 6 and 7 with the transmission signals. These transducers 5.6 and 7 transmit and receive ultrasonic waves at a constant angle of depression, with horizontal direction directions separated by 120 degrees from each other. Amplifying circuits 3, 98 and 10 amplify the received signals of ultrasonic transducers 5, 6δ and 7, and frequency detecting circuits 11, 12 and 13 detect the Doppler shift of the received signal. The sample gate signal generation circuit 14 generates a gate signal for extracting reflected waves from a set depth and a gate signal for extracting seabed reflected waves, respectively. Also, in the figure, block 15. i6δ and 17 respectively store the frequency FW of the reflected wave from the set depth and the frequency FG of the seabed reflected wave. Block 18: From the frequencies of the received signals in three directions,
The ground speed (VXG, VYG) of the coordinate system and the water speed (Vχw, vyW) for the set depth are respectively determined. In addition, in block 19, ground speed (NS
G, EWG) and water velocity (N SW, E WW). Furthermore, in block 20, the north-south direction speed N SC and the east-west speed EWC of the tidal current are determined from the difference between the water speed and the ground speed. In addition, the current velocity is 1βt S
C"〒koπ〒1-, and the flow direction is jan -'
(EWC/NSC).
次に、この発明の実施例である漂流物***置表示装置の
ブロック図、処理手順および表示例をそ二こ示した潮流
計の制御回路部に対応する。ＣＰＵ４０のハスニこは制
御プログラムが予め書き込まれたＲＯＭ４ｉ、その制御
プログラムの実行；こ際して各地点の潮流データ、自船
位置および推測した漂流物体の位置等を記憶するＲＡＭ
４２、表示データが書き込まれるＶＲＡＭ４３、ＶＲＡ
Ｍ４３の読出制御を行う表示制御回路４６、潮流計制ｊ
Ｉ１回路部３０とのインタフェース回路４７および後述
する重み等の設定値を人力するキー人力装置４９とのイ
ンタフェース回路４８が接続されている。また、ビデオ
出力回路４４はＶＲＡ Ｍ４３からの続出信号から映像
信号を発生してＣＲＴ４５へ出力する。Next, a block diagram, a processing procedure, and a display example of a drifting object position display device according to an embodiment of the present invention are shown, corresponding to a control circuit section of a tidal current meter. The CPU 40 has a ROM 4i in which a control program is written in advance, and a RAM that stores tidal current data at each point, the own ship's position, the estimated position of a drifting object, etc.
42, VRAM43, VRA where display data is written
Display control circuit 46 that performs readout control of M43, tidal current meter control j
An interface circuit 47 with the I1 circuit unit 30 and an interface circuit 48 with a key manual device 49 for manually inputting setting values such as weights, which will be described later, are connected. Further, the video output circuit 44 generates a video signal from the successive signals from the VRAM 43 and outputs it to the CRT 45.
第１図に示巳たＣＰＵ４０は第５図において潮流計制御
回路部３０以外のブロックに示した演算処理を行って、
各層の潮流を求めるが、この実施例では海底反射波を抽
出せず、深層潮流を基準として（深層潮流が静止してい
るものとして）、表層潮流との潮流差と中層潮流との潮
流差および自船の移動方向と移動速度を求める。The CPU 40 shown in FIG. 1 performs the arithmetic processing shown in the blocks other than the tidal current meter control circuit section 30 in FIG.
The tidal currents in each layer are determined, but in this example, seafloor reflected waves are not extracted, and the deep tidal current is used as a reference (assuming that the deep tidal current is stationary). Find the direction and speed of your own ship.
ＣＰＵ４０は具体的に第２図に示す手順に従−２て動作
する。まず、キー人力装置の操作によって、またはその
他の漁拐機器等の制御信号から投網開始が検出されたな
ら、タイマ（一定時間毎にＲＡ〜丁の所定領域をカウン
トすることによって構成されるもの。）をスタートさせ
るとともに、測定点カウンタｉをクリアする（ｎｌ−ｎ
２）。測定すべきタイミングとなれば、深層を基準層と
してこの層に対する自船の船速Ｖｉと自船の移動方向Ｄ
ｉを求める（ｎ３−＝ｎ４）。続いて自船の船速度、移
動方向および前回からの経過時間に基づいて自船の位置
（推測位置）Ｐｉを算出する（ｎ５）。たたしタイマス
ター１−時点ては自船位置は基で僕位萱；こあるものと
する。その後、自船位置Ｓこ対応する表示画面上の位置
を算出し５、Ｖ ＲＡ Ｍに書き込む。その際、前回（
ｉ−１）番目の自船位置との間を線で接続する（ｎ６−
ｎ７）。表層潮流の流向［１ｓ ｉ ’と流速Ｖｓｉ’
および中層潮流の流向ｉ）＋ｎｉ’と流速Ｖｍｉ’をそ
れぞれ測定し、この２層の潮流りこおシする流向および
流速と自船の移動方向Ｄ１および船速〜′ｌとの差を求
めること二こよって深層；潮流に対する表層）潮流の１
朝流差（Ｄｓｉ、Ｖｓｉ）および深層、潮流に対する中
層；潮流の潮流差（Ｄｍｉ、Ｖｍｉ）をそれぞれ求める
（ｎ ３ ＝ ｎ ９ ）。The CPU 40 specifically operates according to the procedure shown in FIG. First, when the start of net casting is detected by the operation of a key human-powered device or from a control signal of other fishing equipment, a timer (a device configured to count a predetermined area of RA to D at regular intervals) is detected. ) and clear the measurement point counter i (nl-n
2). When it is time to measure, the ship's speed Vi and the direction of movement D of the ship relative to this layer are determined using the deep layer as the reference layer.
Find i (n3-=n4). Next, the position (estimated position) Pi of the own ship is calculated based on the speed of the own ship, the direction of movement, and the elapsed time since the previous time (n5). Assume that the own ship's position is at the base of the time master 1. Thereafter, the position on the display screen corresponding to the own ship's position is calculated and written to VRAM. At that time, last time (
Connect with the i-1)th own ship position with a line (n6-
n7). Surface current direction [1s i' and current velocity Vsi'
and the flow direction i) + ni' and current velocity Vmi' of the middle-layer tidal current, respectively, and find the difference between the current direction and velocity of the two-layer tidal current and the own ship's moving direction D1 and ship speed ~'l. Therefore, deep layer; surface layer relative to tidal current) 1 of tidal current
The morning current difference (Dsi, Vsi) and the tidal current difference (Dmi, Vmi) of the deep layer and middle layer with respect to the tidal current are determined (n 3 = n 9 ).
その後、次回の測定のために１をインクリメントじ（ｎ
ｉｏ）、既に記憶した各層の潮流差データおよび測定を
行った時の自船位置と測定時からの経過時間に基づいて
測定時に投網された網の相対位置を求める。そのために
まず、既に記憶している各測定点における各種データを
順次読み出すための測定点カウンタ」を初期化する（ｎ
ｉｌ）。続いて、」て示される測定点の位置ｐｓｊ、表
層潮流の流１ｌｉｌ Ｄ Ｓ Ｊ −’ｆｈ速Ｖｓ ｊ
、その測定点における測定時から現在までの経過時間Ｔ
および網の種類や大きさによって異なる重み係数Ｗに基
づいて、測定時に投網された網の表層における相対位置
Ｎ今ｊを求める（ｎ１２）。ここで経過時間Ｔはｉから
」を滅した値に測定タイミングのインターバル時間を乗
じた値である。このようにして表層における網の相対位
置を推測し、その画面上の表示位置を算出し、Ｖ ＲＡ
Ｍに書き込む（ｒｒ１３−＝ｎ １４）。その際、」
−１の測定点の推測位置との間を結ぶ線分として書き込
む。Then increment 1 for the next measurement (n
io) The relative position of the net cast at the time of measurement is determined based on the previously stored tidal current difference data for each layer, the position of the ship at the time of measurement, and the elapsed time from the time of measurement. To do this, first, a measurement point counter for sequentially reading out various data at each measurement point that has already been stored is initialized (n
il). Subsequently, the position psj of the measurement point indicated by ``, the surface current flow 1lil D S J −'fh speed Vs j
, the elapsed time T from the time of measurement at that measurement point to the present
Based on the weighting coefficient W which varies depending on the type and size of the net, the relative position Nj in the surface layer of the net cast at the time of measurement is determined (n12). Here, the elapsed time T is the value obtained by omitting " from i" multiplied by the measurement timing interval time. In this way, the relative position of the net on the surface layer is estimated, its display position on the screen is calculated, and the V RA
Write to M (rr13-=n14). that time,"
Write as a line segment connecting the estimated position of measurement point -1.
その後、同様にして中層におけるｊ番目の測定点の相対
位置を推測し、表示画面上の位置算出およびＶＲＡＭに
対する線分の書き込みを行う（ｎ１５〜ｎ１７）。Thereafter, the relative position of the j-th measurement point in the middle layer is estimated in the same manner, and the position on the display screen is calculated and the line segment is written in the VRAM (n15 to n17).
ｎ１２〜ｎ１７の処理をカウンタｊがｉに等しくなるま
でｊの値をインクリメントしつつ繰り返す（ｎ１８−ｎ
１９−ｎ１２）ｏ ｊ＝ｉとなった時、即ち過去の測定
点における推測位置の更新を完了した時、次の１１１１
定タインミングを待フ（【１１３−ｒ＋ ３ ）。The processes from n12 to n17 are repeated while incrementing the value of j until the counter j becomes equal to i (n18-n
19-n12) When o j = i, that is, when the update of the estimated position at the past measurement point is completed, the next 1111
Wait for the fixed timing ([113-r+3).
以上のようにして、投網した鋼の位置と各点の各層にお
ける潮流の潮流差を一定時間毎に記憶しておき、時間の
経過にともない、投網された網の各点；こイ昌する相対
位置を順次求め、表示する。なお、ｎ９かこの発明シこ
かかる潮流差抽出手段；こ相当し、ｎ １２およびｎ１
５がこの発明にかかる漂流物体相対位置推測手段に相当
する。As described above, the position of the cast net and the tidal current difference in each layer at each point are memorized at regular intervals, and as time passes, each point of the cast net; Find and display the position sequentially. In addition, n9 corresponds to the power flow difference extraction means according to this invention, n12 and n1
5 corresponds to the drifting object relative position estimation means according to the present invention.
以上に示した処理によって第３図↓こ示すような表示が
行われる。同図においてＰは深層を基準とした船の航跡
、Ｅ ＳおよびＥｍはそれぞれ深層潮流を基準とした表
層；朝；禿ぢよび中層；潮流の潮流差を計測開始からの
経過時間分積算して推測した、各層乙こおける漂流物体
のｔ目射位置を表し、互いに異なった色で表示される。Through the processing described above, a display as shown in Figure 3↓ is produced. In the figure, P is the ship's wake based on the deep layer, E S and Em are the surface layer based on the deep tidal current; morning; bald and middle layer; the tidal current difference is integrated over the elapsed time from the start of measurement. The estimated t-eye position of the drifting object in each layer is displayed in different colors.
このように漂流物体が航跡と一致せず、しかも層に応し
て漂流の仕方が異なるのは、各層に応して潮流の流向と
流速が異なるためである。図中航跡Ｐ線上の各マークは
一定時間また：よ一定距離毎の自船位置を表し、また巻
網の四角形や三角形の各マークは各自船位置マークの位
置で投網された網部分等、漂流物体の各層における相対
位置を表している。このように自航跡とともに、巻網等
の漂流物体の相対位置を順次表示するようにしたため、
各々の漂流物体のマーク↓こよって漂流物体が各層の潮
流に従って漂流−でいる状態を的確に読み取ることがで
きる。じかも、自航跡Ｐと各層の相対位置間の距離と方
向から、巻網等の漂流物体が各層の、潮流によって受け
る潮力の方向と量を把握することができる。The reason why a drifting object does not match the wake and how it drifts differs depending on the layer is because the direction and speed of the tidal current differ depending on the layer. In the figure, each mark on the wake P line represents the own ship's position at a certain time or a certain distance, and each square or triangular mark on the purse seine indicates the part of the net cast at the position of the ship's position mark, etc. It represents the relative position of each layer of the object. In this way, the relative position of a drifting object such as a purse seine is displayed in sequence along with its own trajectory.
Marks on each drifting object ↓Thus, it is possible to accurately read the state in which the drifting object is drifting according to the tidal current in each layer. In fact, it is possible to grasp the direction and amount of the tidal force that a drifting object such as a purse seine receives from the tidal current in each layer from the distance and direction between the self-trajectory P and the relative position of each layer.
なお、第３図に示した例では単↓こ自航跡と漂流物体の
相対位置を表示するだけの例であったが、例えば第４図
に示すように、関連する他の情報とともに、表示しても
よい。第４図において５０は潮流と潮流差を表す表示領
域であり、５３は表層潮流、中層潮流または深層潮流の
うち選択された層の潮流ベクトル表示である。また、Ｐ
、ＥｓおよびＥｍはそれぞれ自航跡、表層における漂流
物体の相対位置および中層における漂流物体の相対位１
の表示である。自航跡Ｐにおける六角形のマ一りは段溝
開始点？−表二でし・る。また、同図二こ、ｂハて：Ｊ
ｉて示す領域に表層潮流、中層、潮流および深石朝禿し
・つ各流速と流向を表示し、領域５２に；よ潮、Ａ差（
潮流の流向δよひ流速の差）を表示巳ている。なお、５
４で示す領域には電信方位と真方位との戎す角度（偏角
）と船の横方向の船速およご′航程積算距離を表示して
いる。Note that in the example shown in Figure 3, only the relative position of the self-trajectory and the drifting object is displayed, but as shown in Figure 4, for example, it can be displayed along with other related information. It's okay. In FIG. 4, 50 is a display area showing the tidal current and tidal current difference, and 53 is a tidal current vector display of a layer selected from surface tidal current, middle tidal current, or deep tidal current. Also, P
, Es and Em are the self-trajectory, the relative position of the drifting object in the surface layer, and the relative position of the drifting object in the middle layer, respectively.
This is the display. Is the corner of the hexagon in self-trajectory P the starting point of the groove? - See Table 2. Also, in the same figure, two rows and a row of b: J
In the area indicated by i, the surface current, middle layer, current, and Fukaishi Asahashi flow velocity and current direction are displayed, and in area 52;
Displays the current direction (difference between tidal current direction and current velocity). In addition, 5
In the area indicated by 4, the angle (declination) between the telegraph bearing and the true bearing, the ship's lateral speed, and the cumulative distance traveled are displayed.
＋ｇ＋発明の効果
、二の発明によれば、基準層の：＠；禿に対する各層二
こおける潮流の流向およＳ−流速の差が計測開始かるの
時間分積算されて、各深度二こおける漂流物体の相対位
置が表示されるため、その表示内容から別や逼等の漂流
物体の自航跡に対する相対位置関係および、漂流物体が
潮流差によって受けている張力の様子を的確に把握する
ことができる。+g+ Effect of the invention, according to the second invention, the difference in the flow direction and S- current velocity of the tidal current at two depths in each layer with respect to the reference layer is integrated for the time taken from the start of measurement, and Since the relative position of the drifting object is displayed, it is possible to accurately grasp the relative position of the drifting object, such as a drifter, with respect to its own trajectory, and the state of the tension that the drifting object is under due to the difference in tidal currents. can.
第１図はこの発明の実施例である漂流物***置表示装置
のブロック図、第２図は同装置の処理手順を表すフロー
チャート、第３図：よ画面上の表示例を表す図である。
第４図１よその他の表示例を表す図である。第５図は一
般的な潮流計の構成りよび；ａ流検出方法を示すブロッ
ク図である。
６．７−超音波送受波器、
潮流計制御回路部。FIG. 1 is a block diagram of a drifting object position display device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the processing procedure of the device, and FIG. 3 is a diagram showing an example of a display on a screen. FIG. 4 is a diagram showing a display example other than that shown in FIG. 1; FIG. 5 is a block diagram showing the configuration of a general tidal current meter and a method of detecting a current. 6.7 - Ultrasonic transducer, current meter control circuit.
Claims (1)
定した複数の各層からの反射波の受波により、各層にお
ける潮流の流向および流速を計測する潮流計測手段と、 基準層の潮流に対する、上記各層における潮流の流向お
よび流速の差を抽出する潮流差抽出手段と、 抽出された潮流差を計測開始からの経過時間分積算して
各深度における漂流物体の相対位置を推測する漂流物体
相対位置推測手段と、推測した漂流物体の位置を画面上
に表示する漂流物***置表示手段と、からなる漂流物体
位置表示装置。(1) A tidal current measurement means that measures the direction and velocity of the tidal current in each layer by transmitting ultrasonic waves into the water and receiving reflected waves from each layer set at different depths; A tidal current difference extraction means that extracts the difference in direction and speed of tidal current in each layer, and a drifting object relative position estimation that estimates the relative position of a drifting object at each depth by integrating the extracted tidal current difference over the elapsed time from the start of measurement. and drifting object position display means for displaying the estimated position of the drifting object on a screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026900A JPH0682157B2 (en) | 1990-02-06 | 1990-02-06 | Drifting object position display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2026900A JPH0682157B2 (en) | 1990-02-06 | 1990-02-06 | Drifting object position display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03231185A true JPH03231185A (en) | 1991-10-15 |
| JPH0682157B2 JPH0682157B2 (en) | 1994-10-19 |
Family
ID=12206114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2026900A Expired - Fee Related JPH0682157B2 (en) | 1990-02-06 | 1990-02-06 | Drifting object position display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0682157B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003185746A (en) * | 2001-12-21 | 2003-07-03 | Nichimo Co Ltd | Trawl operation method, and monitor for fish moving- behavior used therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0933555A (en) * | 1995-07-25 | 1997-02-07 | Yamatake Honeywell Co Ltd | Fluid measuring method and device |
-
1990
- 1990-02-06 JP JP2026900A patent/JPH0682157B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003185746A (en) * | 2001-12-21 | 2003-07-03 | Nichimo Co Ltd | Trawl operation method, and monitor for fish moving- behavior used therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0682157B2 (en) | 1994-10-19 |
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