JP2001356015A - Wave measuring system - Google Patents
Wave measuring systemInfo
- Publication number
- JP2001356015A JP2001356015A JP2000177425A JP2000177425A JP2001356015A JP 2001356015 A JP2001356015 A JP 2001356015A JP 2000177425 A JP2000177425 A JP 2000177425A JP 2000177425 A JP2000177425 A JP 2000177425A JP 2001356015 A JP2001356015 A JP 2001356015A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- floating body
- video camera
- ship
- water level
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、船舶等の浮体に設
けられる波浪計測システムに関する。The present invention relates to a wave measuring system provided on a floating body such as a ship.
【0002】[0002]
【従来の技術】従来の船舶に装着される波浪計測装置と
しては、レーザー光線を用いるものや超音波を用いるも
の、電波を用いるものなどがあり、複数のセンサー部か
ら構成された装置が多い。これらは各々のセンサーから
海面に向けて各種信号を発射し、海面において反射して
戻ってきた信号から波浪情報を取得するように動作する
ものである。また、浮体からの波浪計測としては、ブイ
によるものがあげられる。波浪計測ブイは、上下動を計
測する加速度計のほか、浮体の傾斜角や浮体に作用する
流速の計測装置を備え、これらの計測装置から得られる
情報を総合して波浪情報を取得するものである。ビデオ
カメラを用いた波浪計測装置としては、2台のカメラを
用いて構成され、海面上の特定点の位置を3次元で算出
するように動作する技術が開発されている。2. Description of the Related Art Conventionally, a wave measuring device mounted on a ship includes a device using a laser beam, a device using an ultrasonic wave, and a device using a radio wave, and many devices include a plurality of sensors. Each of these sensors emits various signals toward the sea surface from each sensor, and operates to acquire wave information from signals reflected and returned from the sea surface. In addition, the wave measurement from the floating body includes a buoy. Wave measurement buoys are equipped with accelerometers that measure vertical movement, as well as measuring devices for the inclination angle of the floating body and the flow velocity acting on the floating body, and acquire wave information by integrating information obtained from these measuring devices. is there. As a wave measuring device using a video camera, a technology has been developed which is configured using two cameras and operates to calculate the position of a specific point on the sea surface in three dimensions.
【0003】ところで、従来の波浪計測装置の中で船舶
に装着されるものは、上述したとおり超音波やレーザー
光線・電波などの人工的な信号を用いるため、特殊な専
用機材を必要とする上、反射信号から情報を取得するた
め、計測精度は海面の状況に著しく依存する。また、波
浪計測ブイは、波浪計測に適するようにブイの形状が設
計されていなければならない。ビデオカメラを用いるも
のはビデオカメラ2台を使用して3次元的な位置を計測
するために2台のカメラから得られた画像において、海
面上の共通点を設定する必要があり、海面の状況によっ
ては計測が困難となることが予想される。[0003] Among the conventional wave measuring devices, those mounted on a ship use artificial signals such as ultrasonic waves, laser beams, and radio waves as described above. Since information is obtained from the reflected signal, the measurement accuracy is significantly dependent on the sea surface condition. In addition, the buoy shape of the buoy must be designed so as to be suitable for wave measurement. In the case of using a video camera, it is necessary to set a common point on the sea surface in images obtained from the two cameras in order to measure a three-dimensional position using two video cameras. In some cases, it is expected that measurement will be difficult.
【0004】[0004]
【発明が解決しようとする課題】そこで本発明は、浮体
上の少なくとも1台のビデオカメラを用いて撮影された
画像を解析することにより、浮体側部の相対水位を求
め、さらに浮体の波浪に対する応答特性に基づき同相対
水位を補正して波浪情報を的確に抽出できるようにし
た、波浪計測システムを提供することを課題とする。SUMMARY OF THE INVENTION Therefore, the present invention determines the relative water level at the side of the floating body by analyzing an image taken by using at least one video camera on the floating body, It is an object of the present invention to provide a wave measurement system capable of accurately extracting wave information by correcting the relative water level based on response characteristics.
【0005】[0005]
【課題を解決するための手段】前述の課題を解決するた
め、本発明の波浪計測システムは、浮体上に同浮体の側
面と同側面に入射する波浪の波面との交線を撮影するビ
デオカメラを備えるとともに、同ビデオカメラにより撮
影された上記交線の画像を解析して上記浮体の側部の相
対水位を求める画像解析手段と、同画像解析手段により
求められた上記相対水位を上記浮体の波浪に対する応答
特性に基づき補正して上記浮体に対する波浪の入射波方
向スペクトル,出会角,有義波高および有義周期を含ん
だ波浪情報を抽出する波浪情報抽出手段とを備えたこと
を特徴としている。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a wave measuring system according to the present invention comprises: With the image analysis means for analyzing the image of the intersection line taken by the video camera to determine the relative water level of the side of the floating body, the relative water level determined by the image analysis means of the floating body Wave information extracting means for extracting wave information including a wave incident spectrum, a meeting angle, a significant wave height and a significant period of the wave with respect to the floating body by correcting based on a response characteristic to the wave. I have.
【0006】また、本発明の波浪計測システムは、上記
浮体が船舶として構成され、上記の波浪に対する応答特
性が上記船舶の移動速度に応じて設定されていることを
特徴としている。The wave measuring system according to the present invention is characterized in that the floating body is configured as a ship, and a response characteristic to the wave is set according to a moving speed of the ship.
【0007】さらに、本発明の波浪計測システムは、上
記浮体が同浮体の甲板上に外側方へ突出可能のアームを
備え、同アームの先端部に上記ビデオカメラが装着され
ていることを特徴としている。Further, the wave measuring system of the present invention is characterized in that the floating body has an arm which can protrude outward on the deck of the floating body, and the video camera is mounted on the tip of the arm. I have.
【0008】また、本発明の波浪計測システムは、上記
ビデオカメラがカメラアングルを調整可能に設けられて
いることを特徴としている。The wave measuring system according to the present invention is characterized in that the video camera is provided so that the camera angle can be adjusted.
【0009】上述の本発明の波浪計測システムでは、従
来のように特殊な専用機材に頼ることなく、浮体に装備
された通常のビデオカメラを用いて安価に且つ精度よく
波浪情報を得ることができる。In the above-described wave measurement system of the present invention, wave information can be obtained at low cost and with high accuracy by using an ordinary video camera mounted on a floating body without relying on special dedicated equipment as in the prior art. .
【0010】そして、上記浮体が船舶として構成され、
上記波浪に対する応答特性が上記船舶の移動速度に応じ
て設定されていると、同船舶の航行時においても波浪計
測が支障なく行われるようになる。[0010] The floating body is configured as a ship,
If the response characteristics to the waves are set according to the moving speed of the ship, the waves can be measured without any trouble even when the ship is navigating.
【0011】また、上記ビデオカメラが船舶の甲板上に
外側方へ突出可能に設けられたアームの先端部に装着さ
れている場合は、同ビデオカメラを使用時にだけ船体外
方へ突出させて波浪計測が行われるようになり、これに
より接岸等の操船に際して上記ビデオカメラが邪魔にな
らず、しかも同ビデオカメラの使用時にはこれを十分に
船外へ突き出して船側面と波面との交線を能率よく適切
に撮影することができる。When the video camera is mounted on the end of an arm provided on the deck of a ship so as to be able to protrude outward, the video camera is protruded outward from the hull only when the video camera is in use. Measurement is now performed, so that the video camera does not hinder the ship's operation such as berthing, and when the video camera is used, it is protruded sufficiently outboard to efficiently intersect the line of intersection between the ship's side and the wavefront. I can shoot properly well.
【0012】さらに、上記ビデオカメラがカメラアング
ルを調整できるように設けられていると、船舶の喫水に
応じて、カメラアングルを調整することにより、船側面
と波面との交線を一層適切に撮影できるようになる利点
が得られる。Further, if the video camera is provided so that the camera angle can be adjusted, the intersection between the side surface of the ship and the wavefront can be more appropriately photographed by adjusting the camera angle according to the draft of the ship. The advantage that can be obtained is obtained.
【0013】加えて、上記ビデオカメラにより撮影され
た上記交線の画像を解析する際には、画像上で解析領域
を複数設定することによって、必要に応じて1台のビデ
オカメラによって撮影された画像から複数点における浮
体側部の相対水位を求めることが可能である。In addition, when analyzing the image of the intersection line photographed by the video camera, a plurality of analysis regions are set on the image, and the photographed image is photographed by one video camera as necessary. It is possible to determine the relative water level of the side of the floating body at a plurality of points from the image.
【0014】[0014]
【発明の実施の形態】以下、図面により本発明の一実施
形態としての波浪計測システムについて説明すると、図
1は同システムの概念図、図2は同システムにおけるビ
デオカメラの作動状況を船体横断面において示す説明図
であり、図3は上記システムにおける作用の経過を示す
ブロック図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will now be given of a wave measuring system according to an embodiment of the present invention with reference to the drawings. FIG. 1 is a conceptual diagram of the system, and FIG. FIG. 3 is a block diagram showing the progress of the operation in the above system.
【0015】図1,2に示すように、本実施形態の波浪
計測システムでは、浮体としての船舶1の船側面1aと
同船側面1aに入射する波浪の波面2との交線3を撮影
するビデオカメラ4が装備され、同ビデオカメラ4によ
り撮影された画像の信号は、画像解析手段を有する画像
処理機5へ入力されるようになっている。As shown in FIGS. 1 and 2, in the wave measuring system according to the present embodiment, a video for photographing an intersection 3 between a side surface 1a of a ship 1 as a floating body and a wave front 2 of a wave incident on the side surface 1a of the ship. A camera 4 is provided, and a signal of an image captured by the video camera 4 is input to an image processor 5 having image analysis means.
【0016】そして、画像処理機5では、交線3の画像
を解析して船舶1の船側部の相対水位が求められる。ま
た、画像処理機5には船舶1の波浪に対する応答特性に
基づき上記相対水位を補正して船舶1に対する波浪2の
入射波方向スペクトル,出会角,有義波高および有義周
期を含んだ波浪情報を抽出する波浪情報抽出手段も設け
られている。このようにして得られた波浪情報は、安全
運行支援のための表示装置6に表示される。Then, the image processor 5 analyzes the image of the intersection line 3 to determine the relative water level at the side of the ship 1. Further, the image processor 5 corrects the relative water level based on the response characteristics of the ship 1 to the waves and corrects the relative water level to the waves 1 including the incident wave direction spectrum, the meeting angle, the significant wave height and the significant period of the waves 2 with respect to the ship 1. Wave information extracting means for extracting information is also provided. The wave information thus obtained is displayed on the display device 6 for safe operation support.
【0017】なお、本実施形態では船舶に本システムが
搭載されるので、前述の応答特性として船舶の移動速度
に応じ設定されるものが用いられるが、係留ブイのごと
き移動しない浮体に本システムが搭載される場合は一定
の応答特性を用いることができる。In this embodiment, since the present system is mounted on a ship, a response characteristic set according to the moving speed of the ship is used as the above-mentioned response characteristic. However, the present system is installed on a floating body that does not move such as a mooring buoy. When mounted, certain response characteristics can be used.
【0018】ところで、船舶から計測される相対水位変
動は実際の波浪と異なるが、これは次の作用による。 船舶が航走することにより、計測される波の周期が
変化する。(ドップラー効果に類似) 船舶が航走することにより、波を発生させる。(平
水中でも発生) 船舶という物体が波の流場を壊し、波を変形させ
る。(船が動揺、航走していなくても発生) 船舶が動揺することにより、波を発生させる。 このうち、は時間変動がなく常に一定なので、時間平
均をとる等の処理によって容易に除去可能である。他の
,,については、高度な処理手法が必要である。By the way, the relative water level fluctuation measured from the ship is different from the actual wave, but this is due to the following action. As the ship sails, the cycle of the measured wave changes. (Similar to Doppler effect) Waves are generated when a ship sails. (Occurs even in clear water.) An object called a ship breaks the wave flow field and deforms the waves. (Even if the ship is shaking or not sailing) Waves are generated by the shaking of the ship. Among them, is always constant without time fluctuation, and can be easily removed by processing such as time average. For the other,, an advanced processing method is required.
【0019】このような高度な処理手法は、船体を波に
対するアンテナと見なす、いわゆる「船体波高計化」の
技術として示される。 (縦揺れ、横揺れ、相対水位、加速度)入射波として規則
波を考えると、ストリップ法等の計算法を用いて応答特
性が計算できるので、,,をすべて考慮した上で
船体運動を計算することができる。逆に応答特性が既知
であれば、船体運動を引き起こす波を逆算できる。(厳
密には、追波状態で工夫が必要)。Such an advanced processing method is shown as a technique of so-called "hull wave height measurement", which regards a hull as an antenna for waves. (Pitch, roll, relative water level, acceleration) Considering regular waves as incident waves, the response characteristics can be calculated using a calculation method such as the strip method. be able to. Conversely, if the response characteristics are known, the wave causing the hull motion can be calculated backward. (Strictly speaking, the device needs to be devised in the following wave state).
【0020】実海域では、複雑な波浪場を、波長と方向
の異なる個々の規則波の重ね合わせと見なすことによ
り、同様の処理が可能となっている。ただし、波長Nと
おりと方向Mとおりの規則波に分解することを考える
と、連立方程式を厳密に解くためには、N×M個の船体
運動情報が必要である。しかし、上記の船体波高計化の
手法によって、3〜4種類程度の情報から波方向スペク
トル(個々の規則波)を推定することが行われる。In the actual sea area, the same processing can be performed by regarding a complicated wave field as a superposition of individual regular waves having different wavelengths and directions. However, considering the decomposition into regular waves having N different wavelengths and M different directions, N × M pieces of hull motion information are required to rigorously solve the simultaneous equations. However, the wave direction spectrum (individual regular waves) is estimated from about three to four types of information by the above-mentioned technique of measuring the hull wave height.
【0021】上記3〜4種類程度の船体運動情報として
は、原理的には何でもよいが、周波数によってアンテナ
の感度に差があるように、船体運動にも、反応しやすい
(応答特性が大きい)波長がある。例えば、船長の1/
10程度の波長の波が来ても船は揺れないため、縦揺
れ、横揺れおよび加速度は使えない。そこで本発明で
は、比較的広範囲の波長に使用できる相対水位変動が考
慮される。すなわち、3〜4点における相対水位変動が
計測できればそれでもよいし、相対水位変動1点+他の
情報でもよい。これは前述の「船体波高計化」と同様の
処理となるが、本発明では「相対水位変動計測+船体運
動補正」という形で取り扱われるようになっており、図
3はその手順を示している。The above three or four types of hull motion information may be anything in principle. However, the hull motion information is easily responsive (has a large response characteristic) to the hull motion so that the antenna sensitivity varies depending on the frequency. There is a wavelength. For example, 1 /
Even if a wave with a wavelength of about 10 arrives, the ship does not shake, so pitching, rolling and acceleration cannot be used. Thus, the present invention takes into account the relative water level variation that can be used for a relatively wide range of wavelengths. That is, the relative water level fluctuation at three to four points may be measured, or the relative water level fluctuation one point + other information may be used. This is the same process as the above-mentioned "Holter wave height metering", but in the present invention, it is handled as "relative water level fluctuation measurement + hull motion correction", and FIG. 3 shows the procedure. I have.
【0022】図2に示すように、ビデオカメラ4は、船
舶1の船側部において、ヒンジ7により外側方へ突出可
能に設けられたアーム8の先端部に装着されており、こ
のようにして撮影可能の位置にセットされるビデオカメ
ラ4には、さらにカメラアングルを調整しうる支軸機構
9が設けられている。As shown in FIG. 2, the video camera 4 is mounted on the end of an arm 8 provided on the side of the ship 1 so as to be able to protrude outward by a hinge 7 and thus photographed. The video camera 4 set at a possible position is further provided with a spindle mechanism 9 that can adjust the camera angle.
【0023】上述の本実施形態の波浪計測システムで
は、従来のように特殊な専用機材に頼ることなく、浮体
としての船舶1に装備された通常のビデオカメラを用い
て安価に且つ精度よく波浪情報を得ることができる。そ
して、波浪に対する応答特性が船舶1の移動速度に応じ
て設定されるので、同船舶1の航行時においても波浪計
測が支障なく行われるようになる。In the above-described wave measuring system of the present embodiment, the wave information can be obtained at low cost and with high accuracy by using a normal video camera mounted on the marine vessel 1 as a floating body without relying on special equipment as in the prior art. Can be obtained. Since the response characteristics to the waves are set according to the moving speed of the ship 1, the wave measurement can be performed without hindrance even when the ship 1 is navigating.
【0024】また、ビデオカメラ4が船舶1の甲板上に
外側方へ突出可能に設けられたアーム8の先端部に装着
されているため、同ビデオカメラ4を使用時にだけ船体
外方へ突出させて波浪計測が行われるようになり、これ
により接岸等の操船に際してビデオカメラ4が邪魔にな
らず、しかも同ビデオカメラ4の使用時にはこれを十分
に船外へ突き出して船側面1aと波面2との交線3を能
率よく適切に撮影することができる。Further, since the video camera 4 is mounted on the distal end of the arm 8 provided on the deck of the boat 1 so as to be able to protrude outward, the video camera 4 is made to protrude outward only when used. As a result, wave measurement is performed, so that the video camera 4 does not become an obstacle when maneuvering at a shore or the like. The intersection line 3 can be efficiently and appropriately photographed.
【0025】さらに、ビデオカメラ4がカメラアングル
を調整できるように設けられているので、船舶1の喫水
に応じて、カメラアングルを調整することにより、船側
面1aと波面2との交線3を一層適切に撮影できるよう
になる利点が得られる。Further, since the video camera 4 is provided so that the camera angle can be adjusted, the intersection 3 between the ship side surface 1a and the wavefront 2 can be formed by adjusting the camera angle according to the draft of the ship 1. The advantage is obtained that the photographing can be performed more appropriately.
【0026】加えて、上記ビデオカメラ4によって撮影
された画像を画像処理機5において解析する際に、画像
上の解析領域を複数箇所設定することによって、必要に
応じて複数地点における相対水位を求めることができ、
波浪情報の抽出に用いることが可能である。In addition, when the image taken by the video camera 4 is analyzed by the image processor 5, a plurality of analysis areas on the image are set, so that relative water levels at a plurality of points are obtained as necessary. It is possible,
It can be used for extracting wave information.
【0027】[0027]
【発明の効果】以上詳述したように、本発明の波浪計測
システムによれば次のような効果が得られる。 (1) 従来のように特殊な専用機材に頼ることなく、浮体
に装備された通常のビデオカメラを用いて安価に且つ精
度よく波浪情報を得ることができる。 (2) 上記浮体が船舶として構成され、上記波浪に対する
応答特性が上記船舶の移動速度に応じて設定されている
と、同船舶の航行時においても波浪計測が支障なく行わ
れるようになる。 (3) 上記ビデオカメラが船舶の甲板上に外側方へ突出可
能に設けられたアームの先端部に装着されている場合
は、同ビデオカメラを使用時にだけ船体外方へ突出させ
て波浪計測が行われるようになり、これにより接岸等の
操船に際して上記ビデオカメラが邪魔にならず、しかも
同ビデオカメラの使用時にはこれを十分に船外へ突き出
して船側面と波面との交線を能率よく適切に撮影するこ
とができる。 (4) 上記ビデオカメラがカメラアングルを調整できるよ
うに設けられていると、船舶の喫水に応じて、カメラア
ングルを調整することにより、船側面と波面との交線を
一層適切に撮影できるようになる利点が得られる。As described in detail above, according to the wave measuring system of the present invention, the following effects can be obtained. (1) Wave information can be obtained inexpensively and accurately using a normal video camera mounted on a floating body without relying on special dedicated equipment as in the past. (2) If the floating body is configured as a ship and the response characteristics to the waves are set according to the moving speed of the ship, the waves can be measured without any trouble even when the ship is navigating. (3) If the video camera is mounted on the tip of an arm provided on the deck of the ship so as to be able to protrude outward, the video camera can be protruded out of the hull only when used to measure waves. As a result, the video camera does not disturb the ship when maneuvering at a shore, etc., and when the video camera is used, it protrudes sufficiently out of the boat to make the intersection between the ship's side surface and the wavefront efficient and appropriate. Can be taken. (4) If the video camera is provided so that the camera angle can be adjusted, by adjusting the camera angle according to the draft of the ship, it is possible to more appropriately capture the intersection line between the ship side surface and the wavefront. Is obtained.
【図1】本発明の一実施形態としての波浪計測システム
の概念図である。FIG. 1 is a conceptual diagram of a wave measurement system as one embodiment of the present invention.
【図2】図1の波浪計測システムにおけるビデオカメラ
の作動状況を船体横断面において示す説明図である。FIG. 2 is an explanatory diagram showing an operation state of a video camera in the wave measurement system of FIG. 1 in a cross section of a hull.
【図3】図1,2の波浪計測システムにおける作用の経
過を示すブロック図である。FIG. 3 is a block diagram showing a progress of an operation in the wave measurement system of FIGS.
1 船舶 1a 船側面 2 波面 3 交線 4 ビデオカメラ 5 画像処理機 6 表示装置 7 ヒンジ 8 アーム 9 カメラアングル調整用支持機構 DESCRIPTION OF SYMBOLS 1 Ship 1a Ship side surface 2 Wavefront 3 Intersecting line 4 Video camera 5 Image processor 6 Display device 7 Hinge 8 Arm 9 Camera angle adjustment support mechanism
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石田 茂資 東京都三鷹市新川6丁目38番1号 運輸省 船舶技術研究所内 (72)発明者 宮崎 剛 東京都千代田区内幸町2丁目1番1号 運 輸施設整備事業団内 Fターム(参考) 2F014 AA05 AB01 FA04 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigeshi Ishida 6-38-1 Shinkawa, Mitaka-shi, Tokyo Inside the Ship Research Institute of the Ministry of Transport (72) Inventor Tsuyoshi Miyazaki 2-1-1 Uchisaiwaicho, Chiyoda-ku, Tokyo F-term (Reference) 2F014 AA05 AB01 FA04
Claims (4)
る波浪の波面との交線を撮影するビデオカメラを備える
とともに、同ビデオカメラにより撮影された上記交線の
画像を解析して上記浮体の側部の相対水位を求める画像
解析手段と、同画像解析手段により求められた上記相対
水位を上記浮体の波浪に対する応答特性に基づき補正し
て上記浮体に対する波浪の入射波方向スペクトル,出会
角,有義波高および有義周期を含んだ波浪情報を抽出す
る波浪情報抽出手段とを備えたことを特徴とする、波浪
計測システム。1. A video camera for photographing an intersection of a side surface of the floating body with a wavefront of a wave incident on the side surface, and analyzing an image of the intersection taken by the video camera. Image analysis means for determining the relative water level of the side of the floating body, and correcting the relative water level determined by the image analysis means based on the response characteristics of the floating body to waves, the spectrum of the incident wave direction of the waves with respect to the floating body, A wave measuring system, comprising: wave information extracting means for extracting wave information including an angle of association, a significant wave height, and a significant period.
いて、上記浮体が船舶として構成され、上記の波浪に対
する応答特性が上記船舶の移動速度に応じて設定されて
いることを特徴とする、波浪計測システム。2. The wave measuring system according to claim 1, wherein the floating body is configured as a ship, and a response characteristic to the wave is set according to a moving speed of the ship. Measurement system.
いて、上記浮体が同浮体の甲板上に外側方へ突出可能の
アームを備え、同アームの先端部に上記ビデオカメラが
装着されていることを特徴とする、波浪計測システム。3. The wave measuring system according to claim 2, wherein the floating body has an arm that can protrude outward on a deck of the floating body, and the video camera is mounted on a tip of the arm. Wave measurement system characterized by the following.
いて、上記ビデオカメラがカメラアングルを調整可能に
設けられていることを特徴とする、波浪計測システム。4. The wave measuring system according to claim 3, wherein the video camera is provided so that a camera angle can be adjusted.
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