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WO2003053775A1 - Systeme de commande et de controle des deplacements d'un bateau et equipement destine a ce dernier - Google Patents

Systeme de commande et de controle des deplacements d'un bateau et equipement destine a ce dernier

Info

Publication number
WO2003053775A1
WO2003053775A1 PCT/SE2002/001711 SE0201711W WO03053775A1 WO 2003053775 A1 WO2003053775 A1 WO 2003053775A1 SE 0201711 W SE0201711 W SE 0201711W WO 03053775 A1 WO03053775 A1 WO 03053775A1
Authority
WO
WIPO (PCT)
Prior art keywords
ship
sensor
sensors
monitor screen
point
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.)
Ceased
Application number
PCT/SE2002/001711
Other languages
English (en)
Inventor
Karl Helge Vestin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2003053775A1 publication Critical patent/WO2003053775A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/14—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude for indicating inclination or duration of roll

Definitions

  • the invention in question is a system designed to monitor and control ship motions regarding at least pitch and roll with the aid of a number of specially designed sensor (s) and a PC to put in order the calculations on the basis of the made controls.
  • GB 2094476 A shows an example of stress monitoring equipment where several measuring devices are used to measure the deflection of a ship.
  • a PC and monitor are used to define the maximum stress by using a suitable algorithm of curves as applied by the PC.
  • a large amount of measuring equipment must be used and the stress estimate must be worked on continuously.
  • US 4,872,118 A is of a measuring system for trim and s-t-a-bi-lity ⁇ control. This system works well when the ship is anchored during loading and discharging, but is not so useful during transport.
  • WO 87/07876 is of a device and method to control the charge distribution on a ship. Many measuring devises are required to make this method work, including measuring devices to control the water, pressure on the ship. However, this method is not exact and requires numerous measurements as well as points of measuring.
  • US 5,547,327 A is of a control system that is to be used when loading a ship. This system is also very complicated and demands a lot of measuring devices as well.
  • the system according to the invention in question that is mainly characterized thereby, that at least one sensor that is meant to be mounted on the vessel.
  • the sensor is composed of covered plates, that are combined two by two at a relative distance from each other.
  • the acceleration measurement of forces in x and/or y and/or z direction/directions can be measured with the said sensor.
  • the said sensor is also meant to be connected to a computer that is communicating with a monitor and the said computer is arranged to receive the measurement results from the said sensor.
  • the said computer is set up to determine the desired conditions of the vessel in question, on the basis of the received measurement test results and, with the help of a software program, to visualize the calculated values on the monitor .
  • Said system consists in its basic form of one sensor usually mounted in the forepart of the vessel and linked by cable to a computer on the bridge giving a visual real-time display and analysis of the ship's motions when at sea or, when in port, to calculate the relationship between the centre of gravity and the metacenter. At least two sensors are required to measure the torsion and hull stresses. One in the bow and the other fitted towards the stern. Measuring the angle and period of roll and pitch together with 3D acceleration makes it possible to estimate the forces on lashings and containers during the voyage thereby reducing the risk of accidents. Graphic analysis of all historic movements can be recorded over a period of up to 30 days continuously.
  • the system will help the crew to make more informed decisions particularly since it will also give predictive sea-state information enabling preventative action to be taken.
  • the primary function of the system is therefore to assist the ship's officer of the watch to improve sea-keeping in rough weather by displaying the data in easily understandable graphics. An audible and visual alarm is given when pre-set alarm levels are reached.
  • Another purpose will be achieved by a device that is mainly characterized by the sensor, which is composed of covered plates that are combined in pairs at a relative distance from each other.
  • the software enables reception of information, of different measured values, to be used for the subsequent calculation of the desired results and that the calculated results are subsequently displayed graphically on the monitor.
  • Fig. 1 is a perspective view of a sensor.
  • Fig. 2 is a picture of the PASA window.
  • Fig. 3 is a picture of the SAMP window.
  • Fig. 4 is a picture of the HSC window.
  • Fig. 5 shows part of the PASA window in Fig. 2 during a measuring exercise.
  • Fig. 6 shows a graphic picture of pitch and roll from the PASA window.
  • Fig. 7 shows a picture of different choices in the program menu.
  • Fig. 8 shows a picture of the SAMP display.
  • Fig. 9 shows various readings of the sensor that are logged and are shown on screen in the shape of a curve.
  • Fig. 10 shows various alarm function readings during a particular period and that have been stored in tables .
  • Fig. 11 shows the division of onboard container stacks within the cargo hold (of the vessel) as well as their stresses at different measuring points.
  • This invention which concerns a system designed to monitor and control ship motion (1), will use at least one sensor (2) when controlling and monitoring pitch and roll. However, when controlling and monitoring torsion and deflection, it will use at least two or more sensors (2) and also when putting into order the calculations according to the controls that have been made.
  • the system consists of at least one sensor (2) , that is composed of plates, that are combined two by two at a relative distance from each other and, that is meant to be mounted on the ship (1) .
  • the sensor (2) will measure the acceleration of forces in one, two or three dimensions in relation to each other at perpendicular angles x, y and z .
  • the sensor (2) consists of one, two or three internal sensor units. Each sensor unit consists of two plates, one being stationary and the other being movable.
  • the distance between the two plates will change, depending on the angle of the sensor in relation to the direction of gravity or acceleration on the sensor.
  • An electrical field is also measured between the two plates .
  • the distance between the plates will change and the resulting signal can be analysed as a sum of the changes in angle and acceleration.
  • the signal is analyzed along a time axis and can therefore be separated as acceleration and angle.
  • the measure values from the sensor can be applied directly to the control systems of the ship or alternatively to a PC. With a PC, the motions will be shown graphically (as described below) .
  • the said sensor (2) shall be connected to a PC (3) that is connected to a monitor (4) or to another similar device.
  • the PC (3) shall receive the measured values from the said sensor (2) and according to these values, it shall calculate, with the aid of a software program, the desired conditions for the vessel (1) . Preferably these calculated values shall be shown graphically on a monitor screen (4) .
  • the motions of the ship such as pitch and roll as per Fig. 2.
  • the total pitch is displayed on screen (4) .
  • the colours are red for the outer ring and yellow for the inner ring, 6 and 7 respectively.
  • One point (8) is shown on screen (4) to display the pitch and roll of the ship or other conditions that are to be monitored.
  • the diameter (h) on the said point (8) is programmed to display the value of the influenced forces on the ship graphically.
  • the said point (8) is programmed to move on the screen (4) in the same direction as the forces that are bearing on the vessel.
  • the motion of the point 8 is directly proportional to the acceleration. Also, there will be made a warning of some kind when the point crosses the outer ring (6) on the screen.
  • At least two sensors (2) of the above mentioned type are attached to the ship (1) , at a relative distance from each other, to measure the movements of the ship. With the aid of the said measured values, it will enable a calculation of the stresses on the ship regarding torsion and deflection. In this situation, one of the two sensors 2 is to be placed in the foreship while the second one of the two sensors is to be placed in the stern.
  • the said invention enables the use of a system, of the type mentioned above, to control and monitor the stress on a vessel.
  • the said invention also controls and monitors at least pitch and roll with the aid of one or more sensors (2) that enable the system to make calculations from the measured readings of the sensor (s).
  • the sub units of the said sensor (2) are composed of plates that are combined two by two at a relative distance from each other.
  • the said sensor has a shut in the cover that enable it to be used as an accelerometer to measure up to three different perpendicular directions (x, y and z) and that the speeds, movements, positions, deformations and stresses can be measured by the said sensor (2) .
  • a device (9) with holes for fixing screws and a PC with a monitor screen (4) and a software program, to be connected to the said sensor (2) .
  • the software is made to be able to receive information about different measure values for making subsequent calculations of the desired functions, and to monitor these calculated conditions graphically on a monitor screen (4) .
  • S.M.C Ship Motion Controller
  • the sensors 2 which are used by the present invention are meant for: Angle and shock analyzer. Hull stress control. Lash control. ⁇ Sea-state" prediction. Stability control system. Tank level program.
  • the measure system makes it possible to connect one or more sensors depending on the function desired.
  • Each sensor measures an angle, movement speed, movement direction and shocks in three degrees of freedom.
  • the sensor signals will be transformed to a data communication signal that makes the signal transmission to the signal transformer possible without any disturbance.
  • One sensor is normally enough for measuring a ship' s movement. When there are special circumstances, more than one sensor could be necessary. Example is control of loading capacity in several separate cargo spaced. For measuring torsion and deflection there will be two sensors needed. Hardware installation
  • the sensor has been cast in epoxy plastic and the sensor house is made of stainless steel to avoid moisture damage. Although the sensor is well protected we recommend installation in a splash proof box. The sensor must be installed close to the centre line of the ship and at the prow and the sensor shall be installed with the disc horizontal. The arrows marked "Y" 3 on the top of the sensor must be mounted in accordance with the direction of the ship.
  • the base side will show all the measuring functions of the program.
  • the program window has been designed in two parts. In the upper part are shown the basic information of the ship's current movements as per the figure 7. The information is made in bars as well as numerically under each bar. The rightmost bar shows the temperature inside the sensor body.
  • PASA is built up with two circles 6, 7, a red and a yellow, and one point 8, a green in a system of coordinates.
  • the two centric circles move in the diagram of in relation to the movements of the ship. Both angle and direction is shown. Thickness of the circles 6, 7 corresponds to alarm levels.
  • the point 8 illustrates shocks, which the ship is exposed to. This ring will move in the system of coordinates in proportion to the acceleration. When the rings touch each other alarm will be given. The event will be registered in "Events" and the alarm will sound. All maximum values are adjustable by the bar controls.
  • PASA gives you a graphic picture of the pitch and roll of the ship shown in Figs 2 and 6.
  • the inner yellow circle 7 shows "low level alarm”.
  • the red outer circle 6 shows "high level alarm”.
  • the yellow and the red circles move in the system of coordinates with the current movements of the ship.
  • the pitch will be described by the moving of the Y-direction in the system of coordinates.
  • the roll will be described by the moving of the X-direction.
  • the total angle of inclination will be shown automatically.
  • the setting of the maximum allowed pitch is the same as the one on the angle bar above.
  • the diameter of the green 8 point will be changed according to the G-force. Higher G-force gives a bigger diameter of the point.
  • the point has its ground position in the centre of the coordinates. When accelerating laterally the green point 8 will move in the same direction as the force of acceleration. The movement of the point 8 is directly proportional to the acceleration.
  • the green point moves and touch the yellow 7 or red 6 field there will be an event registered in the "Events" and the alarm will be given.
  • H The diameter of the point corresponds to the size shock value .
  • the function resembles the PASA but is a definite analysis of shock and acceleration in 3-dimensions .
  • Optimises and simplifies trim control through an integrated ballast tank level system Optimises economic fuel consumption and diminishes hull stess.
  • the program calculates the average value of each rolling period for Roll and Pitch. Thereafter, by one point in the diagram, the average value is calculated in 30 minutes periods. This point In the diagram shall be in origo of coordinates when the ship is running optimal. In the point there is an arrow showing the direction of the deviation. The size of the arrow symbolizes the deviation speed but without any scale of degrees.
  • the 0- position (home position) deviates from the 0-point of the sensor and therefore this 0-point should be set separately. The optimal 0-point will vary depending on the speed and cargo of the ship as well as weather conditions.
  • the curve is divided into two parts.
  • the left one shows the events during the previous hour.
  • the signal Predictions show the expected average curve for the coming hour.
  • the Prediction Curve is estimated from an average value "Average Force” from the previous hour.
  • the Alarm levels "Max Limit” and “Warn Limit” are the same as the set values in "PASA”. This is not shown on any fig. Events
  • Rectify transforms the graphic negative values to positive. This means that the negative values will be moved to the positive scale and you can compare the positive peaks with the negative peaks.
  • Acceleration, shock and speed of movement are dependent on the distance between the Centre point of Torsion, the Sensors Measuring point and the actual point (the actual container.
  • the program calculates the distance to all measuring points on the ship.
  • the program calculates acceleration and inclination for all measuring points on the ship in compliance with the given distances and sensor values .
  • the program is designed for maximum number of containers according to:
  • the program calculates the distance to all containers on board.
  • the program calculates acceleration and inclination for all containers on board in compliance with the given distances and sensor values.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Navigation (AREA)

Abstract

L'invention porte sur un système et sur un dispositif de commande et de contrôle des contraintes exercées sur la coque d'un bateau telles que le tangage et le roulis, ce contrôle étant effectué au moyen d'un certain nombre de capteurs et d'un dispositif permettant de faire des calculs en fonction des commandes. Selon cette invention, on fixe au bateau concerné (1) un nombre de capteurs (2). Chacun de ces capteurs est composé de plaques combinées deux par deux, à une distance relative l'une de l'autre. Les capteurs (2) doivent être connectés à un ordinateur (PC), lui-même connecté à un écran de contrôle. L'ordinateur recevra les valeurs des mesures envoyées par les capteurs et, sur la base de ces valeurs et au moyen d'un programme logiciel, calculera les conditions convenant audit bateau. Les valeurs calculées seront alors affichées sur l'écran de contrôle.
PCT/SE2002/001711 2001-09-28 2002-09-23 Systeme de commande et de controle des deplacements d'un bateau et equipement destine a ce dernier Ceased WO2003053775A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0103258A SE522964C2 (sv) 2001-09-28 2001-09-28 System för att kontrollera och övervaka fartygs påverkan samt medel härför
SE0103258-0 2001-09-28

Publications (1)

Publication Number Publication Date
WO2003053775A1 true WO2003053775A1 (fr) 2003-07-03

Family

ID=20285502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/001711 Ceased WO2003053775A1 (fr) 2001-09-28 2002-09-23 Systeme de commande et de controle des deplacements d'un bateau et equipement destine a ce dernier

Country Status (2)

Country Link
SE (1) SE522964C2 (fr)
WO (1) WO2003053775A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2277057C2 (ru) * 2004-03-05 2006-05-27 Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт им. акад. А.Н. Крылова" Устройство для измерения угла крена или дифферента плавучего средства на волнении
US10040520B2 (en) 2013-10-04 2018-08-07 Naiad Maritime Group, Inc. AC servo motor hydraulic units for ship motion control
WO2021222475A1 (fr) * 2020-04-28 2021-11-04 Atherton Dynamics, Llc. Calcul de période de roulis pour un vaisseau

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524710A (en) * 1979-01-11 1985-06-25 The Boeing Company Automatic trim system for hydrofoil craft
US4566336A (en) * 1983-06-27 1986-01-28 Canadian Patents & Development Ltd. Societe Canadienne Des Brevets Et D'exploitation Limited Navigational aid alerting system
US4872118A (en) * 1984-08-09 1989-10-03 Naidenov Evgeny V System for automated monitoring of trim and stability of a vessel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524710A (en) * 1979-01-11 1985-06-25 The Boeing Company Automatic trim system for hydrofoil craft
US4566336A (en) * 1983-06-27 1986-01-28 Canadian Patents & Development Ltd. Societe Canadienne Des Brevets Et D'exploitation Limited Navigational aid alerting system
US4872118A (en) * 1984-08-09 1989-10-03 Naidenov Evgeny V System for automated monitoring of trim and stability of a vessel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2277057C2 (ru) * 2004-03-05 2006-05-27 Федеральное государственное унитарное предприятие "Центральный научно-исследовательский институт им. акад. А.Н. Крылова" Устройство для измерения угла крена или дифферента плавучего средства на волнении
US10040520B2 (en) 2013-10-04 2018-08-07 Naiad Maritime Group, Inc. AC servo motor hydraulic units for ship motion control
US10683066B2 (en) 2013-10-04 2020-06-16 Naiad Maritime Group, Inc. AC servo motor hydraulic units for ship motion control
WO2021222475A1 (fr) * 2020-04-28 2021-11-04 Atherton Dynamics, Llc. Calcul de période de roulis pour un vaisseau
GB2609812A (en) * 2020-04-28 2023-02-15 Atherton Dynamics Llc Calculation of roll period for a vessel
GB2609812B (en) * 2020-04-28 2024-05-08 Atherton Dynamics Llc Calculation of roll period for a vessel

Also Published As

Publication number Publication date
SE0103258L (sv) 2003-03-29
SE0103258D0 (sv) 2001-09-28
SE522964C2 (sv) 2004-03-16

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