US3759094A - Method for monitoring the forces in the mooring cable of a single-point mooring system - Google Patents

Method for monitoring the forces in the mooring cable of a single-point mooring system Download PDF

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Publication number
US3759094A
US3759094A US00157837A US3759094DA US3759094A US 3759094 A US3759094 A US 3759094A US 00157837 A US00157837 A US 00157837A US 3759094D A US3759094D A US 3759094DA US 3759094 A US3759094 A US 3759094A
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US
United States
Prior art keywords
mooring
ship
mooring system
point
point mooring
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.)
Expired - Lifetime
Application number
US00157837A
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English (en)
Inventor
J Al
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.)
Shell USA Inc
Original Assignee
Shell Oil Co
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Filing date
Publication date
Application filed by Shell Oil Co filed Critical Shell Oil Co
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Publication of US3759094A publication Critical patent/US3759094A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K73/00—Drawn nets
    • A01K73/02—Trawling nets
    • A01K73/10—Determining the quantity of the catch, e.g. by the pull or drag on the lines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B2021/003—Mooring or anchoring equipment, not otherwise provided for
    • B63B2021/008—Load monitors

Definitions

  • ABSTRACT A system for monitoring the force in a mooring cable of a single-point mooring system and transmitting from the single-point mooring system to a ship moored thereto a signal related to the measured force whereby said ship can disconnect from said single-point mooring system when said signal exceeds a preset maximum value.
  • the invention relates to a method for monitoring the mooring force in the mooring cable of a single-point mooring system for the loading and unloading of a ship and to an apparatus for carrying out this method.
  • Single-point mooring systems of the abovementioned type are provided with a mooring cable by means of which a ship can be moored by its bow in such a manner that the ship can freely swing about the single-point mooring system.
  • the method according to the invention comprises measuring the mooring force, transmitting a signal from the single-point mooring system, which signal is a measure for the measured mooring force, receiving the transmitted signal on the shore or on board'the ship, and disconnecting the ship from the single-point mooring system when the signal received indicates that the mooring force exceeds a certain predetermined maximum value.
  • the signal is preferably transmitted or received over a radio link. lt will be understood, however, that in principle it is also possible to make use of an optical signal or a sound signal.
  • a single-point mooring system of the abovementioned type is characterized according to the invention in that the single-point mooring system is provided with a tension dynamometer for measuring the mooring force and with means coupled to the tension dynamometer for producing a signal which is a measure for the measured mooring force.
  • a ship 2 is to be moored to and to be loaded or unloaded via a single-point mooring system 1 as mentioned above.
  • Weather conditions being favorable (wind force, wave height, current strength)
  • the ship 2 is fastened in the usual manner by its bow to a mooring cable 3 of the single-point mooring system.
  • a floating hose 6 is coupled to the ship 2 and a start is made with loading or unloading liquid or gas via the single-pointmooring system.
  • the system shown is of the known buoy type, which is provided with a customary pipe length 5 and a customary pipe swivel 4.
  • a tension dynamometer 7 of a type known per se is provided between the buoy l and the mooring cable 3, by means of which the mooring force acting in the mooring cable 3 can be measured as and when desired.
  • the single-point mooring system I carries equipment for, converting the measured values of the mooring force into electric signals, as well as radio transmitting equipment capable of transmitting corresponding radio signals to the coast or to the ship 2 moored to and single-point mooring system 1.
  • the equipment is diagrammatically designated by reference numeral 8.
  • This equipment 8 is'coupled to the tension dynamometer 7, which is diagrammatically designated by the broken line 9.
  • the signals transmitted by 8 are received by means of receiving equipment 10 on board the ship 2 (or on the shore, if desired), so that those on board the ship 2 (or on the shore, if desired) are constantly kept informed of the magnitude of the mooring force in the mooring cable 3.
  • the mooring master who as a matter of routine boards the ship from the shore to assist in the mooring and unmooring of the ship relative to the single-point mooring system, is provided with a special portable wireless receiving unit 10. With the aid of this unit he receives the signals 11 which are transmitted from the single-point mooring system 1; a dial on the portable receiving unit shows the actual mooring force in tons. In this way the mooring master is constantly kept informed of the magnitude of the mooring force in the mooring cable 3. As soon as this mooring force exceeds the permissible value, he may in concert with the master of the ship 2 devise and take the measures required to prevent damage to the ship and the single-point mooring system.
  • the electrical equipment on the single-point mooring system 1 is preferably fed from a plurality of batteries present on the single-point mooring system 1. To prevent these batteries from discharging in too short a time, the electrical equipment on the single-point mooring system 1 is preferably not constantly in operation. It is attractive, for example, to provide the mooring masters portable wireless receiving unit 10 with a transmitter by means of which a radio signal can be transmitted to the single-point mooring system 1 in order to actuate the electrical equipment 8 on the single-point mooring system 1.
  • the single-point mooring system 1 may also be provided with a time switch (not shown), which is capable of automatically putting the electrical equipment 8 out of action after a certain period.
  • the method and apparatus according to the invention have the advantage that optimum use can be made of the single-point mooring systems, and this yields considerable savings.
  • each mooring cable should be provided with a tension dynamometer, thus allowing the mooring master at any time to receive the signals indicating the mooring force in each mooring cable.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Fluid Mechanics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Transmitters (AREA)
US00157837A 1970-07-10 1971-06-29 Method for monitoring the forces in the mooring cable of a single-point mooring system Expired - Lifetime US3759094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7010213A NL7010213A (es) 1970-07-10 1970-07-10

Publications (1)

Publication Number Publication Date
US3759094A true US3759094A (en) 1973-09-18

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ID=19810549

Family Applications (1)

Application Number Title Priority Date Filing Date
US00157837A Expired - Lifetime US3759094A (en) 1970-07-10 1971-06-29 Method for monitoring the forces in the mooring cable of a single-point mooring system

Country Status (8)

Country Link
US (1) US3759094A (es)
JP (1) JPS5516872B1 (es)
CA (1) CA951975A (es)
DE (1) DE2134104C3 (es)
ES (1) ES393028A1 (es)
FR (1) FR2100402A5 (es)
GB (1) GB1351227A (es)
NL (1) NL7010213A (es)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913396A (en) * 1972-04-28 1975-10-21 Secretary Trade Ind Brit Monitoring system for moored floating vessels
US3956742A (en) * 1975-01-30 1976-05-11 Imodco, Inc. Mooring load sensor
US3992934A (en) * 1974-04-26 1976-11-23 Strainstall Limited Mooring device
US4048850A (en) * 1975-10-08 1977-09-20 Simrad A.S. Mechanism for gauging the catch within a trawl net
US4205619A (en) * 1978-08-28 1980-06-03 Mock George W Jr Automatic flare signal apparatus
US4295437A (en) * 1978-08-28 1981-10-20 Mock Jr George W Automatic flare signal apparatus
US4566339A (en) * 1983-12-23 1986-01-28 Southern Systems, Inc. Chain pull monitor system
US4651139A (en) * 1983-06-22 1987-03-17 Oettli Martin W Method for monitoring the drift of an anchored vessel and device for implementing the method
US4736633A (en) * 1986-03-25 1988-04-12 Fmc Corporation Multipurpose lifting and pulling vehicle
US5235861A (en) * 1991-05-03 1993-08-17 Seppa Tapani O Power transmission line monitoring system
US5432515A (en) * 1992-04-09 1995-07-11 O'conner; Joe S. Marine information system
US20090133313A1 (en) * 2006-08-08 2009-05-28 Henning Skjold-Larsen Angle-Based Filling Ratio Indicator
US9576475B2 (en) 2013-09-10 2017-02-21 Southwire Company, Llc Wireless-enabled tension meter
CN107588880A (zh) * 2017-09-30 2018-01-16 中国船舶重工集团公司第七〇九研究所 海洋核动力平台单点系泊系统试车台及其参数获取方法
CN113226910A (zh) * 2018-11-26 2021-08-06 帝人株式会社 系泊索监视系统、系泊管理系统、系泊索监视方法及系泊管理方法
IT202000023185A1 (it) * 2020-10-01 2022-04-01 Aurora Sails “sistema di ormeggio per imbarcazioni a pontili mobili e fissi e simili”

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60224426A (ja) * 1984-04-23 1985-11-08 村井　邦彦 時限制御自動給水植物育成装置
GB9206409D0 (en) * 1992-03-24 1992-05-06 Knox John H Alarm system
EP0609472A1 (de) * 1993-02-02 1994-08-10 MWB MOTORENWERK BREMERHAVEN GmbH Fangerfassung an Bord von Fischereifahrzeugen
DE19716684B4 (de) 1997-04-21 2009-11-26 Deep Blue Technology Ag Anker-/Ankerketten-Überwachungsvorrichtung
FR2897548B1 (fr) * 2006-02-20 2008-03-28 Commissariat Energie Atomique Systeme de securite pour bateau de peche
CN107576479B (zh) * 2017-09-30 2023-06-06 中国船舶重工集团公司第七一九研究所 海洋核动力平台单点系泊系统试车设备及其调试方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848828A (en) * 1932-03-08 Mooring
US2142135A (en) * 1937-07-23 1939-01-03 Western Union Telegraph Co Telemetric apparatus for determining the tension on and angular direction of submarine cables during cable laying operations
US2617294A (en) * 1950-10-27 1952-11-11 Lawrence C Sanders Traction dynamometer
US2795136A (en) * 1956-08-21 1957-06-11 Matt Heinrich Karl Cable load gage
US3248937A (en) * 1963-09-09 1966-05-03 Pan American Petroleum Corp Load-measuring device
US3281781A (en) * 1965-10-22 1966-10-25 Saylor S Milton Boat drift alarm system
US3290931A (en) * 1962-10-31 1966-12-13 Girling Ltd Weight sensing crane hook
US3330154A (en) * 1965-01-12 1967-07-11 Sigma Systems Corp Apparatus for measuring the resultant load on a stationary shaft
US3418627A (en) * 1966-06-20 1968-12-24 Lyons Jim Drift indicator for anchored boats
US3614869A (en) * 1969-09-09 1971-10-26 Exxon Research Engineering Co Pivoted tower single point mooring systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL110056C (es) * 1962-07-25 1964-11-16
NL141837B (nl) * 1963-08-07 1974-04-16 Shell Int Research Eenpunts-meerboei.
DE1271575B (de) * 1963-08-07 1968-06-27 Shell Int Research Boje zum gleichzeitigen Laden bzw. Loeschen von mehreren Fluessigkeiten
US3580207A (en) * 1969-04-04 1971-05-25 Mcmullen Ass John J Method and means for mooring
JPS5516872A (en) * 1978-07-21 1980-02-05 Hitachi Shipbuilding Eng Co Escalator equipment

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848828A (en) * 1932-03-08 Mooring
US2142135A (en) * 1937-07-23 1939-01-03 Western Union Telegraph Co Telemetric apparatus for determining the tension on and angular direction of submarine cables during cable laying operations
US2617294A (en) * 1950-10-27 1952-11-11 Lawrence C Sanders Traction dynamometer
US2795136A (en) * 1956-08-21 1957-06-11 Matt Heinrich Karl Cable load gage
US3290931A (en) * 1962-10-31 1966-12-13 Girling Ltd Weight sensing crane hook
US3248937A (en) * 1963-09-09 1966-05-03 Pan American Petroleum Corp Load-measuring device
US3330154A (en) * 1965-01-12 1967-07-11 Sigma Systems Corp Apparatus for measuring the resultant load on a stationary shaft
US3281781A (en) * 1965-10-22 1966-10-25 Saylor S Milton Boat drift alarm system
US3418627A (en) * 1966-06-20 1968-12-24 Lyons Jim Drift indicator for anchored boats
US3614869A (en) * 1969-09-09 1971-10-26 Exxon Research Engineering Co Pivoted tower single point mooring systems

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913396A (en) * 1972-04-28 1975-10-21 Secretary Trade Ind Brit Monitoring system for moored floating vessels
US3992934A (en) * 1974-04-26 1976-11-23 Strainstall Limited Mooring device
US3956742A (en) * 1975-01-30 1976-05-11 Imodco, Inc. Mooring load sensor
US4048850A (en) * 1975-10-08 1977-09-20 Simrad A.S. Mechanism for gauging the catch within a trawl net
USRE30841E (en) * 1975-10-08 1982-01-05 Simrad As Mechanism for gauging the catch within a trawl net
US4205619A (en) * 1978-08-28 1980-06-03 Mock George W Jr Automatic flare signal apparatus
US4295437A (en) * 1978-08-28 1981-10-20 Mock Jr George W Automatic flare signal apparatus
US4651139A (en) * 1983-06-22 1987-03-17 Oettli Martin W Method for monitoring the drift of an anchored vessel and device for implementing the method
US4566339A (en) * 1983-12-23 1986-01-28 Southern Systems, Inc. Chain pull monitor system
US4736633A (en) * 1986-03-25 1988-04-12 Fmc Corporation Multipurpose lifting and pulling vehicle
US5235861A (en) * 1991-05-03 1993-08-17 Seppa Tapani O Power transmission line monitoring system
US5432515A (en) * 1992-04-09 1995-07-11 O'conner; Joe S. Marine information system
US20090133313A1 (en) * 2006-08-08 2009-05-28 Henning Skjold-Larsen Angle-Based Filling Ratio Indicator
US9576475B2 (en) 2013-09-10 2017-02-21 Southwire Company, Llc Wireless-enabled tension meter
US10107699B2 (en) 2013-09-10 2018-10-23 Southwire Company, Llc Wireless enabled tension meter
CN107588880A (zh) * 2017-09-30 2018-01-16 中国船舶重工集团公司第七〇九研究所 海洋核动力平台单点系泊系统试车台及其参数获取方法
CN107588880B (zh) * 2017-09-30 2023-05-09 中国船舶重工集团公司第七一九研究所 海洋核动力平台单点系泊系统试车台及其参数获取方法
CN113226910A (zh) * 2018-11-26 2021-08-06 帝人株式会社 系泊索监视系统、系泊管理系统、系泊索监视方法及系泊管理方法
EP3889028A4 (en) * 2018-11-26 2022-09-14 Teijin Limited MOORING LINE MONITORING SYSTEM, MOORING MANAGEMENT SYSTEM, MOORING LINE MONITORING METHOD AND MOORING MANAGEMENT METHOD
CN113226910B (zh) * 2018-11-26 2023-11-14 帝人株式会社 系泊索监视系统、系泊管理系统、系泊索监视方法及系泊管理方法
IT202000023185A1 (it) * 2020-10-01 2022-04-01 Aurora Sails “sistema di ormeggio per imbarcazioni a pontili mobili e fissi e simili”

Also Published As

Publication number Publication date
DE2134104A1 (de) 1972-01-20
NL7010213A (es) 1970-09-23
CA951975A (en) 1974-07-30
ES393028A1 (es) 1974-06-01
FR2100402A5 (es) 1972-03-17
DE2134104B2 (de) 1981-01-22
GB1351227A (en) 1974-04-24
JPS5516872B1 (es) 1980-05-07
DE2134104C3 (de) 1981-09-17

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