NO346724B1 - A mooring system for monitoring tension in a mooring line specially adapted for subsea tension-recording - Google Patents
A mooring system for monitoring tension in a mooring line specially adapted for subsea tension-recording Download PDFInfo
- Publication number
- NO346724B1 NO346724B1 NO20181465A NO20181465A NO346724B1 NO 346724 B1 NO346724 B1 NO 346724B1 NO 20181465 A NO20181465 A NO 20181465A NO 20181465 A NO20181465 A NO 20181465A NO 346724 B1 NO346724 B1 NO 346724B1
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- Prior art keywords
- tension
- mooring
- junction box
- detecting device
- tension detecting
- Prior art date
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- 238000012544 monitoring process Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 16
- 239000011810 insulating material Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 9
- 230000004888 barrier function Effects 0.000 claims description 8
- 239000002775 capsule Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 241000251468 Actinopterygii Species 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/102—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors located at a non-interrupted part of the flexible member
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
- G01L5/103—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors fixed at one end of the flexible member
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Description
The present invention relates to a mooring system for mooring a marine device,
said system comprising a at least one tension detecting device adapted to be connected to the marine device and at least one mooring line having a first end connected to the tension detecting device and a second end adapted to be connected to a marine equipment,
said tension detecting device comprises tension detection means adapted to register tension changes in the mooring line(s) and adapted to send a tension signal based on the tension changes
said tension detecting device comprises a waterproof capsule enclosing the tension detection means,
and the system further comprises at least one waterproof junction box connected to at least one tension detecting device,
said junction box is adapted to receive tension signals sendt from the tension detection means using communication means.
GB1481447 A discloses a vessel mooring system comprising groups of mooring equipment fixed to wharf. Each group includes a tension-detecting element and at least one hook. Ropes are connected at one end to a hook and at the other end to a winch on the vessel. The tension exerted on each group is adjustable through signals produced by the tension detecting element so that the vessel can be moored in a balanced condition. The tension detecting elements may be strain gauges, load cells or tension meters. The mooring system is not suitable to be placed under water and is therefore not suitable for mooring the tension in mooring lines mooring subsea appliance.
Further, other systems that exists today for monitoring tension in mooring systems is located topside in “dry” environment.
CN 204855068 U discloses a storage type loop tension sensing device comprising a tension sensor. The tension sensor is provided with two lifting rings for connecting the anchor rope, and a tension sensing unit is capable of converting the pulling force of the anchor rope acting on the two lifting rings into an electrical signal output. The citation further discloses that the storage type ring tension sensing device comprises a battery pack, a microprocessor circuit board, a memory, a USB interface and a waterproof sealed outer casing.
US6422089 B1 describes a load cell for measuring the static or slowly fluctuating load, or tension, on devices contained in a support tube. A sensor in the tube utilizes magnetic cores attached to opposing ends of the support tube. A magnetic circuit is formed having an inductance defined by the size of the gap between the magnetic cores with the reluctance dominated by the gap. The sensor inductance is coupled with a fixed, predetermined capacitance in a resonant LC circuit, and the resonant frequency is a function of the gap. The sensor is in a cavity within the tube, and the cavity is sealed in a manner that prevents water or other damaging agents from entering the sensor.
GB 2501303 A discloses a mooring line monitor comprising an elongate main body, a protective shroud, at least one operational condition sensor, at least one acoustic transmitter, and a source of electrical power for powering the operation of the sensor and transmitter. The main body has at opposite first and second ends respectively a first mooring line connection and a second mooring line connection and between these connections an intermediate portion of the main body. The mooring line connections are configured for connection to respective underwater mooring lines such that, in use, the intermediate section is under tension between the first and second ends when the mooring line is under load. Each sensor is attached to the intermediate section and linked to the acoustic transmitter. The protective shroud extends around the intermediate portion of the main body in order to encompass and protect the sensor, the transmitter and the source of electrical power.
KR 20170043340 A relates to a mooring apparatus and a system for measuring tension of a mooring line using the same. According to an embodiment of the invention, a mooring apparatus may comprise: a guide unit guiding a mooring line; a stopper unit provided in the guide unit to restrict movement of the mooring line and a measurement unit measuring power which is applied to the stopper unit by the mooring line.
With other words, it is desirable to be able to moor marine devices with a system that is able to withstand the impact of water/water-penetration and therefore can be placed under the water line. This makes it possible to place the tension detecting element close to a subsea marine device it is mooring and thereby improving the accuracy of the measured tension. It enables reliable mooring of subsea marine devices and thereby minimize the need for constant manual control. The system is particular suitable for mooring fish farms and other subsea placed marine devices such as offshore windmill parks and boats moored in boat ports.
The present invention seeks generally to improve a mooring system for mooring marine devices such that the abovementioned insufficiencies and drawbacks of today’s mooring systems are overcome or at least it provides a useful alternative.
According to the invention, a mooring system is provided, as per the introductory part of this specification, and wherein the tension detecting device comprises at least two chambers located inside the tension detecting device,
a first chamber and a second chamber separated from each other by a waterproof barrier,
said tension detection means is placed in the second chamber and with an electrical connection through the waterproof barrier to the first chamber, said first chamber is connected to the junction box by the communication means and each chamber is filled with water insulating material.
By this construction, a physical water barrier is built into the device and making it less likely that water will penetrate all the way to the tension detection means.
The system contains several tension detecting devices, which are permanently placed subsea and are designed for working long-life under water without any need for service. The tension detecting device is mounted in connection with mooring lines and monitor continuously or in given intervals the tension in the mooring lines. All the tension detecting devices comprising the tension detection means such as load-cells will be connected to a topside system that shows the tension in the different mooring lines. The load-cells are connected in cluster subsea by use of the subsea junction boxes and cables or fibers.
The system can be used for all kinds of mooring systems where there is a need for monitoring the tension in the different ropes/chains/wires/mooring lines. The system is designed for mooring systems where the tension measuring shall be done subsea but it can off course also be used for mooring systems where the tension measuring takes place over the water line that is in dry surroundings.
The system uses industrial load cells such as Strain Gauges that normally is working in “dry" environment in order to measure tension. However, in this new system the load cell is encapsulated into a long-life watertight housing. The signals are transferred by a cable from the load cells to a terminal placed inside each junction box. The signal received in a junction box may also come from a neighboring junction box. Cables then transfer the signals from here to a topside central unit for processing the signals. The communication takes advantageously place by cables but could also be wireless in regions where wireless signals are possible. The mooring system is monitoring tension in mooring lines and the system is specially adapted for subsea tensionrecording and measuring.
According to one embodiment, the waterproof capsule comprises an outer jacket enclosing a water insulating material,
the outer jacket comprising a first connecting end and an opposite placed second connecting end said first connecting end connected to the first end of the mooring line and the second end connected directly or indirectly to the marine device.
By waterproof is to understand that the device is made so “hydrophobic"/water-resistant as possible in order to prevent water to penetrate and damage/ short-circuit the electrical parts.
By directly or indirectly is to understand that the second end might be directly connected to the marine devise such as a fish farm or to a robe which is connected to the fish farm. Nevertheless, it is an advantageous that the second end is placed as close as possible to the marine device. The outer jacket is also constructed as waterproof as possible using O-rings where parts are assembled.
According to one embodiment, the tension detection means comprises load cells such as strain gauge, fiber optic strain gauge, Piezoelectric load ceil. These detection means make the measurement reliable and simple to process.
According to one embodiment, the communication means comprises an electrically conductive cable comprising subsea connecting means located at each end of the cable and adapted to engage the junction box at one end and the tension detecting device or another junction box at the other end.
According to one embodiment, the cable comprises a hose enclosing a hydrophobic liquid such as oil, and said liquid is enclosing a wire.
The wire is PEHD insulated and the wire continues into the first chamber and connects by electrical connectors of different kind to the load cells placed in the second chamber. The waterproof barrier physically separates first and second chamber from each other.
According to one embodiment, the junction box comprises a waterproof housing enclosing water insulating material, said water insulating material encloses a terminal adapted to collect the signals send from the tension detecting device.
The water/condense insulating material is preferably an inert gas such as nitrogen. However, other materials could be chosen. The signals come directly from tension detecting devices or indirectly as a junction box typically also receives signals from other junction boxes.
According to one embodiment, the water insulating material comprises an oil or a gel or an inert gas such as nitrogen or a combination thereof.
The mentioned materials are all characterized by being hydrophobic. The material is preventing water ingress and/or condensation.
According to one embodiment, that each junction box is adapted to receive signals from one or preferably several tension detecting devices and that the received signals are send to a central unit for processing the signals and thereby calculating the tension in the mooring line(s).
According to one embodiment, the marine device is a fish farm.
According to one embodiment, the marine equipment is an anchor.
According to one embodiment, the junction box and the tension detecting devices are attached to mooring line connection points/equipment such as an anchor plate, a grid of mooring lines or directly to the marine device such as a fish farm.
According to one embodiment, the junction box, cables, mooring lines and tension detecting devices are placed under water line and are subsea devices
According to one embodiment, the second chamber comprising the tension detection means has an inside pressure different form the first chamber said first chamber has a pressure equal to sea pressure.
The invention is also related to use of the system according to the invention for measuring tension in mooring lines said system placed under water line/subsea and used to moor marine devices such as fish farms.
Brief description of the drawings
FIG. 1 is a diagrammatic view of a system according to the invention attached to fish farms in order to measure the tension of the mooring lines fastening the fish farms to the seabed.
FIG. 2 is a perspective view of the system comprising a junction box, cables, mooring lines and tension detecting devices.
FIG. 3 is a sectional view through a tension detecting device shown in fig 2 and 1.
FIG. 4 is a sectional view through a junction box shown in fig 2 and 1 .
The invention will be explained with reference to fig. 1 showing a diagrammatic view of a system 1 according to the invention attached to a marine device here a fish farm 2 in order to measure the tension of mooring lines 4 such as a chain. The figure shows the fish farm 2 comprises two fishing nets placed in the middle of a mooring grid 28 and attached to the grid by fastening robes 31 .
The fish farm 2 is fastened to mooring lines 4 which in a first end 5 is secured to a first connecting end 14 of a tension detecting device 3 and in the opposite end - the second end 8 - is fastened to a marine equipment -an anchor 27. The tension detecting device 3 is in the opposite end of the first connecting end 14 attached indirectly by a second connecting end 15 to the fish farm 2. This is in this case done by having an anchor plate 30 incorporated in the mooring grid 28. The anchor plate 30 is connected to a floating buoy 29 in order not to sink. The anchor plates 30 have attached to them a junction box 10, which receives signals from the tension detecting devices 3 by a cable. The system 1 comprises several tension detecting devices 3 each fastened to an anchor 27 in one end and in the other fastened to the anchor plate 30 and connected by communication means such as a cable or wireless to the junction box 10 placed on the anchor plate 30. The junction boxes 10 are connected to each other by communication means - a cable 11. In the example, one junction box 10 receives the signals from all the junction boxes 10 and send it to a central unit 26 for processing the signal. If the tension is registered to be to height to be ignored, it is the possible to strengthen the mooring lines 4 and other equipment before an accident occurs. The number of tension detecting devices 3 and the number of junction boxes 10 will vary from system to system depending on the requirement.
FIG. 2 is a perspective view of the system comprising a junction box 10, cables 11 , mooring lines 4 and tension detecting devices 3. The junction box 10 and the tension detecting devices 3 are attached to an anchor plate 10, which could be exchanged with other types of mooring line connection points such as a mooring line or chain or directly to a marine device such as a boat or off shore windmill. All this equipment is placed below sea surface. The reference signs of the figure are the same as is the case for fig. 1 . The cables 11 connecting the tension detecting devices 3 with the junction box 10 and the cables 11 connecting the junction box 10 with other junction boxes or the central unit (not shown) are made waterproof. They comprise an oil-filled hose with a wire inside. The wire is insulated with a plastic material such as PEHD. The cables are connected to a device with subsea connectors.
The construction of one preferred embodiment of the tension detecting device 3 according to the invention will be explained with reference to fig 3 showing a sectional view through a tension detecting device 3 shown in fig 2 and 1.
The tension detecting device 3 comprises a substantially waterproof capsule 9 comprising an outer jacket 12 enclosing a water insulating material 13. The outer jacket 12 is made of several pieces assembled to a substantially waterproof housing. With waterproof is to understand that the jacket 12 is made as resistant as possible for water penetration. Between the different parts, sealing rings 33 (O-rings) are placed in order to improve the waterproof properties. The jacket is preferably made in a corrosion resistant material such as steel.
The housing is inside divided into two chambers: a first chamber 16 and a second chamber 17. The second chamber may be divided into several chambers. A waterproof barrier 32 separates the two chambers 16,17. Both chambers 16,17 are filled with the water insulating material 13 such as an inert gas (Nitrogen for instance) oil or a gel such as 3M Scotchcast Electrical Re-enterable Resin In the second chamber 17 is tension detection means 6 placed. They comprise 4 Strain Gauges but the number could be more or less. The load cells 6 are electrical connected to each other and they register changes in the tension of a tension body 36 due to tension changes in a mooring line connected to the first connection end 14 of the tension detecting device and thereby the tension body 36. The opposite end of the tension detecting device 3 is the second connecting end 15, which is attached to the marine device directly or indirectly as shown in fig. 1 .
The signals from the load cells 6 are send to a converter 37 also placed in the second chamber 17. The converter sends the signal to the first chamber 16 through electrical connections 34 here pins made in an electrically conductive material such as cobber.
The piercing by the pins 34 through the waterproof barrier 32 is water protected by enveloping the part of the pins 34 placed in the first chamber 16 with boot-seals 38.
The pins 34 are connected to a wire 35 insulated with PEHD. This wire is an extension of the wire 35 placed in the cable 11 . The cable 11 connects to the first chamber 16 by a connecting means 19 such as a subsea connector. The cable 11 is described above. The cable 1 1 connects in the opposite end to a junction box (not shown) with a subsea connector 19. The construction of the first 16 and second 17 chamber sees to that water drops that may flow through the cable and into the first chamber 16 does not reach the second chamber 17. This is due to the separation of the chambers 16, 17 and that the tension detection means 6 are placed well away and waterproof from the inlet of the cable 11. The arrows of the figure show how forces is pulling the tension detecting means 6 in each end and away from each other.
The construction of one preferred embodiment of the junction box 10 will be explained with reference to fig. 4 showing a sectional view through a junction box shown in fig 2 and 1.
It comprises a substantially waterproof hollow housing 40 comprising a top and a bottom piece and the connections between the parts sealed with sealing rings 33.
The housing 40 encloses a water insulating material 13 as described above. A terminal 25 for collecting the signals from the tension detecting device is placed inside the housing 40 and is protected by the water insulating material 13. At the outside of the housing 40 is 4 subsea bulk heads 39 placed. Two of them receives cables 11 from neighboring junction boxes and two of them receives cables from two tension detecting devices. The subsea connectors 19 engaging the subsea bulkhead connectors 39 connect the cables 11 to the housing 40. The numbers of connectors varies from system to system.
Advantageously one junction box 10 is responsible for receiving all the signals from all the other junction boxes and from a couple of tension detecting devices and send this signal to a central unit for processing the signal. The processed signal tells the operator whether there is a need for strengthen the mooring equipment - such as the mooring lines.
The mooring system has been explained in connection with a fish farm but could also be used for mooring other marine devices such as off-shore windmills or boats in a boat port. In these cases, the system as such is in principle the same but the connection to the marine device will change within the scope of the knowledge of a technical professional.
Claims (9)
1. A mooring system (1 ) for mooring a marine device (2), said system comprising one or several tension detecting devices (3) adapted to be connected to the marine device (2) and one or several mooring lines (4) having a first end (5) connected to a tension detecting device (3) and a second end (8) adapted to be connected to a marine equipment (27), said each tension detecting device (3) comprises tension detection means (6) adapted to register tension changes in the mooring lines (4) and adapted to send a tension signal (7) based on the tension changes,
said each tension detecting device (3) comprises a waterproof capsule (9) enclosing the tension detection means (6),
and the system (1 ) further comprises at least one waterproof junction box (10) connected to the at least one tension detecting device (3), said junction box (10) is adapted to receive tension signals (7) send from the tension detection means (6) using communication means (11 ) characterized in
that said tension detecting device (3) comprises at least two chambers (16, 17) located inside each tension detecting device (3), a first chamber (16) and a second chamber (17) separated from each other by a waterproof barrier (32),
said tension detection means (6) is placed in the second chamber (17) and with an electrical connection (34) through the waterproof barrier (32) to the first chamber (16), said first chamber (16) is connected to the junction box (10) by the communication means (11 ), and each chamber (16,17) is filled with water insulating material (13).
2. The mooring system (1 ) according to claim 1 characterized in that the waterproof capsule (9) comprises an outer jacket (12) enclosing the water insulating material (13),
the outer jacket (12) comprising a first connecting end (14) and an opposite placed second connecting end (15), said first connecting end (14) connected to the first end (5) of the mooring lines (4) and the second connecting end (15) connected directly or indirectly to the marine device (2).
3. The mooring system (1) according to any of the previous claims characterized in that the tension detection means (6) comprises load cells (6) from any of following types; strain gauge, fiber optic strain gauge or Piezoelectric load cell.
4. The mooring system (1) according to any of the previous claims characterized in that the communication means (11) comprises an electrically conductive cable (11) comprising subsea connecting means (19) located at each end of the cable (11) and adapted to engage the junction box (10) at one end and the tension detecting device (3) or another junction box (10) at the other end.
5. The mooring system (1 ) according to claim 4 characterized in that the cable (11) comprises a hose enclosing a hydrophobic liquid and said liquid is enclosing a wire (35).
6. The mooring system (1) according to any of the previous claims characterized in the junction box (10) comprises a waterproof housing (40) enclosing the water insulating material (13), said water insulating material (13) encloses a terminal (25) adapted to collect the signals (7) sent from the tension detecting device (3).
7. The mooring system (1) according to any of the previous claims characterized in that the water insulating material (13) comprises an oil or a gel or an inert gas or a combination thereof.
8. The mooring system (1) according to any of the previous claims characterized in that each junction box (10) is adapted to receive signals (7) from one or several of the tension detecting devices (3), a d that the rec ved sig als are sent to a central u t (26) for processing the signals and thereby calculating the tension in the mooring lines (4).
9. The mooring system (1 ) according to claim 1 -8 for measuring tension in the mooring lines (4) said system (1) is placed under water line/subsea and used to moor the marine device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20181465A NO346724B1 (en) | 2018-11-15 | 2018-11-15 | A mooring system for monitoring tension in a mooring line specially adapted for subsea tension-recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20181465A NO346724B1 (en) | 2018-11-15 | 2018-11-15 | A mooring system for monitoring tension in a mooring line specially adapted for subsea tension-recording |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20181465A1 NO20181465A1 (en) | 2020-05-18 |
| NO346724B1 true NO346724B1 (en) | 2022-12-05 |
Family
ID=71095552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20181465A NO346724B1 (en) | 2018-11-15 | 2018-11-15 | A mooring system for monitoring tension in a mooring line specially adapted for subsea tension-recording |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO346724B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422089B1 (en) * | 2001-04-26 | 2002-07-23 | Bbnt Solutions Llc | Load measurement device |
| GB2501303A (en) * | 2012-04-19 | 2013-10-23 | Pulse Structural Monitoring Ltd | Monitoring of underwater mooring lines |
| CN204855068U (en) * | 2015-07-30 | 2015-12-09 | 中国水产科学研究院南海水产研究所 | Storage formula rings pulling force sensing device |
| KR20170043340A (en) * | 2015-10-13 | 2017-04-21 | 삼성중공업 주식회사 | Mooring apparatus and system for measuring tension of mooring line |
-
2018
- 2018-11-15 NO NO20181465A patent/NO346724B1/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422089B1 (en) * | 2001-04-26 | 2002-07-23 | Bbnt Solutions Llc | Load measurement device |
| GB2501303A (en) * | 2012-04-19 | 2013-10-23 | Pulse Structural Monitoring Ltd | Monitoring of underwater mooring lines |
| CN204855068U (en) * | 2015-07-30 | 2015-12-09 | 中国水产科学研究院南海水产研究所 | Storage formula rings pulling force sensing device |
| KR20170043340A (en) * | 2015-10-13 | 2017-04-21 | 삼성중공업 주식회사 | Mooring apparatus and system for measuring tension of mooring line |
Also Published As
| Publication number | Publication date |
|---|---|
| NO20181465A1 (en) | 2020-05-18 |
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