WO2016056923A1 - Instrument suspension pour un instrument dived et utilisation de cette suspension - Google Patents

Instrument suspension pour un instrument dived et utilisation de cette suspension Download PDF

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Publication number
WO2016056923A1
WO2016056923A1 PCT/NO2015/050185 NO2015050185W WO2016056923A1 WO 2016056923 A1 WO2016056923 A1 WO 2016056923A1 NO 2015050185 W NO2015050185 W NO 2015050185W WO 2016056923 A1 WO2016056923 A1 WO 2016056923A1
Authority
WO
WIPO (PCT)
Prior art keywords
instrument
flow
wire
suspension
catcher
Prior art date
Application number
PCT/NO2015/050185
Other languages
English (en)
Inventor
Lars BERG-HANSEN
Original Assignee
Norseaqua As
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 Norseaqua As filed Critical Norseaqua As
Publication of WO2016056923A1 publication Critical patent/WO2016056923A1/fr

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Classifications

    • 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
    • A01K61/00—Culture of aquatic animals
    • A01K61/80—Feeding devices
    • 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
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • 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
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Definitions

  • the invention relates to a suspension for a dived instrument. More specifically the invention relates to an instrument suspended in a wire and the instrument suspension is arranged to be able to cause the instrument to move in a water column relatively to a substantially horizontal water current or to horizontal water currents in the water column. Even more specifically the invention relates to an instrument suspension for use in a net cage for farming of fish wherein the instrument is used for regulating the feeding of feed. For such use the instrument may be a camera or a Doppler.
  • Feed for salmon farming constitutes about 50 percent of the production costs for Atlantic salmon and rainbow trout. It is the decidedly largest cost item for salmon farmers. Feeding of salmon and rainbow trout in the sea mainly takes place by use of an open net cage. An important aim for the feeding is to give the right amount of feed to the fish at any time.
  • Patent publication WO 2009/008733 discloses this.
  • Patent publication WO 2012030226 shows a feeding system for fish wherein the feeding system may be moved relative to the current direction. A dived camera downstream of the feeding system is used for evaluating the strength of the current by showing the drift of the feed pellet in the water. The position of the camera relative to the feeding system may be regulated by increasing or reducing the distance between the camera and the feeding system on the surface. It is also known to use a flow catcher for measuring the flow velocity and for stopping the feeding when the current is too strong .
  • the company Akvapartner AS sells a so-called camera tube (Akvapart- ner, Utstyrskatalog (product catalogue) 2014).
  • a tube is in its upper portion fastened to a float.
  • the camera tube moves with the current and can turn 360° around the float.
  • a camera is fastened in the lower portion of the tube.
  • the upper float is fastened to a feeding unit by means of a lead rope such that the camera tube may have a drift from the feeding unit.
  • the camera tube constitutes a flow catcher. When the water current is strong, the camera tube lies approximately horizontally in the water surface.
  • the fish are assumed to be fed to satiation when they do not eat more feed pellets. Feed pellets in the water column will then be visible for the camera, and this may be seen on a screen. However, on many locations the current is so strong that it takes the feed sideways out of the net cage. Therefore, the feed pellets do not sink so far down in the water column that they may be observed by means of the camera. Thus, it is not registered that the fish are fed to satiation and the feeding continues. This is partly remedied by the aforementioned camera tube.
  • the water may flow in different directions on different depths. A rigid tube will take a position which is a sum of the forces acting in different directions, or the tube will be lifted in the lower part such that it drifts in an upper layer of water and does not extend to a deeper layer of water.
  • a Doppler may register feed in the water column.
  • the invention has for its object to remedy or to reduce at least one of the disadvantages of the prior art, or at least to provide a useful alternative to the prior art.
  • An instrument which is suspended into a net cage will, in accordance with the invention, be brought to be in the right place relative to the water current and its influence on the movement of the pellets in the water column.
  • the instrument may be a camera or a Doppler.
  • the keeper will then be able to watch the feed from the camera when the salmon are satiated.
  • the signals from a Doppler may be converted into a visual, comprehensible image on a screen.
  • the keeper may thereby stop the feeding at the right time. In this way it is achieved that the feeding is done in the right amount and at the right time, in a simple way.
  • the invention relates to a rope or a wire with at least two flow catchers fastened to the rope or wire.
  • the flow catchers are influenced by the water current or the water currents such that the overall influence has the same current impact on the instrument as the current has on the feed pellets.
  • the same water current which takes the feed pellets also takes the instrument in the same direction.
  • the instrument will thereby move with the current or currents and be where the feed pellets sink to the same depth as the instrument.
  • the rope may be eight metres deep and be fastened to the instrument or to an instrument housing.
  • the flow catchers may have different shape and size down along the rope.
  • the shape of the flow catchers may in one embodiment be circular.
  • a flow catcher may consist of three circular plates which are welded together perpendicularly to each other.
  • the invention relates to an instrument suspension for a dived instrument wherein the instrument suspension comprises a wire which projects out below a flow catcher for fastening of the instrument, characterized in that at least two flow catchers are fastened along the wire.
  • Three flow catchers may be fastened along the wire.
  • Four or more than four flow catchers may be fastened along the wire.
  • At least one of the flow catchers may be movable along the wire.
  • the flow catcher may show a shape which has substantially the same cross-sectional area relative to a flow direction.
  • the primary shape of the flow catcher may be chosen from a group comprising a sphere, a tetrahedron, a hexahedron, an octahedron, a dodecahedron and an icosahedron.
  • primary shape is meant that one or more imaginary surfaces in the flow catcher constitute the shape while the flow catcher itself is constituted by plates which do not constitute a surface of the primary shape.
  • the primary shape of the flow catcher may be an irregular shape.
  • the plates may be perforated in order to allow some through-put of water through the flow catcher.
  • a first flow catcher may in its position of use be positioned along the wire above a second flow catcher, and the first flow catcher may have a size which is bigger than the second flow catcher.
  • a plurality of flow catchers may have a decreasing size down along the wire.
  • a plurality of flow catchers may in an alternative embodiment have the same size down along the wire.
  • the instrument may be chosen from a group comprising a camera and a Doppler.
  • the group may also comprise other instruments such as an oxygen meter, a current meter, a salinometer and a thermometer. It is also within the invention that more instruments may be fastened to the instrument suspension.
  • an instrument suspension for a dived instrument wherein the instrument suspension comprises a wire which extends out below a flow catcher for fastening of the instrument, characterized in that at least one movable flow catcher is fastened along the wire in the longitudinal direction of the wire.
  • At least two flow catchers may be fastened. Three or more than three flow catchers may be fastened along the wire. At least two of the flow catchers may be movable along the wire.
  • the flow catcher may show a shape which has substantially the same cross-sectional area relative to a direction of current.
  • the primary shape of the flow catcher may be chosen from a group comprising a sphere, a tetrahedron, a hexahedron, an octahedron, a dodecahedron and an icosahedron.
  • primary shape is meant that one or more imaginary surfaces in the flow catcher constitute the shape while the flow catcher itself is constituted by plates which do not constitute a surface of the primary shape.
  • the primary shape of the flow catcher may be an irregular shape.
  • the plates may be perforated in order to allow some through-put of water through the flow catcher.
  • a first flow catcher may in its position of use be positioned along the wire above a second flow catcher, and the first flow catcher may have a size which is bigger than the second flow catcher.
  • a plurality of flow catchers may have a decreasing size down along the wire.
  • a plurality of flow catchers may in an alternative embodiment have the same size down along the wire.
  • the invention more specifically relates to a use of the instrument suspension described above, wherein the instrument suspension is provided with an instrument and is positioned inside of a net cage.
  • the net cage is an enclosure for farming of fish.
  • the instrument suspension may be provided with two or more instruments.
  • the instrument suspension is connected to a feeding apparatus. Thereby is achieved that the instrument which is fastened to the instrument suspension will be close to where the feed sinks down through the water column at the depth where the instrument is positioned.
  • the position of the instrument is dynamic as the instrument suspension will move with the water current or the water currents downwards in the water column. This gives the keeper good information about the feeding behaviour of the fish in the net cage, and feeding may be terminated when the keeper gets a signal that the amount of feed in the instrument is increasing. Increasing feed amount is a signal that the fish are satiated.
  • a method for positioning a dived instrument on a desired location in a water column, the method comprising :
  • the method may further comprise to choose flow catchers such that the cross- sectional area of the first flow catcher is larger than the cross-sectional area of the second flow catcher which is positioned below the first flow catcher.
  • the flow catcher may in an alternative embodiment appear in a primary shape as a platonic body like a tetrahedron, a hexahedron, an octahedron, a dodecahedron and an icosa- hedron.
  • a primary shape is meant that one or more imaginary surfaces constitute the shape while the flow catcher is constituted by plates which do not constitute a surface of the primary shape. The plates may be perforated in order to allow some through-current of water through the flow catcher.
  • the flow catcher may also have other irregular shapes.
  • the flow catcher may be provided with a through-hole through which the wire may be thread.
  • An instrument suspension in accordance with the invention has the advantage that strong current will not bring the entire instrument suspension up to the water surface.
  • a strong surface water current may force the uppermost flow catcher to the surface, but the distance to the next flow catcher may be made so large that the next flow catcher will be positioned in a level beneath the strong surface water current. This may be achieved by displacing the flow catcher along the wire. This will be similar for strong water currents at a deeper level of the water column.
  • Fig. 1 shows a dived instrument suspension in accordance with the invention
  • Fig. 2 shows in a larger scale a flow catcher in an embodiment of the instrument suspension
  • Fig. 3 shows in another scale how different directions of water current at different depths influence on the instrument suspension.
  • the reference numeral 1 indicates an instrument.
  • the instrument 1 is dived in a net cage (not shown) for farming of fish (not shown).
  • the instrument 1 is suspended in a wire 2.
  • multiple flow catchers 3 are positioned.
  • three flow catchers 3', 3", 3"' are shown.
  • the wire 2 and the flow catcher 3 constitute an instrument suspension 9 for the instrument 1.
  • the number of flow catchers 3 may be varied due to local conditions.
  • the number of flow catchers 3 is at least two.
  • the number of flow catchers 3 may be two.
  • the number of flow catchers 3 may be three or more than three.
  • the instrument 1 may be constituted by a camera.
  • the instrument 1 may be constituted by a Doppler.
  • the flow catchers 3 are shown with a primary spherical shape in the Figures.
  • Each flow catcher 3 is constituted by plates 31 which are welded together in such a way that they appear as three circular plates 33, 35, 37 fastened perpendicularly to each other.
  • the flow catcher 3 is shown provided with a through-going, central opening 4 which the wire 2 may be thread through.
  • the flow catcher 3 may be displaced upwardly or downwardly along the wire 2 to a desired depth.
  • the position of the flow catcher 3 along the wire 2 may be kept by means of for example a wire lock (not shown) at the lower edge of the flow catcher 3.
  • the flow catchers 3', 3", 3"' may be of the same size.
  • the size may be 20 cm in diameter when the flow catcher 3', 3", 3"' has a circular or spherical shape.
  • the diameter of the flow catcher 3 may be between 10 cm and 50 cm, such as 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, 40 cm or 45 cm.
  • the diameter of the flow catcher 3 may also be 50 cm or larger than 50 cm, such as 60 cm, 70 cm, 80 cm, 90 cm or 100 cm.
  • the size of the flow catcher 3 may be chosen based on how far down the water column the instrument 1 is dived and on the current intensity of the water at different depths in the net cage.
  • the flow catcher 3 may be of other shapes than those shown in the drawings.
  • the flow catcher 3 may for instance appear with a primary shape as a platonic body such as a tetrahedron, a hexahedron, an octahedron, a dodecahedron and an icosahedron.
  • a primary shape is meant that one or more imaginary surfaces constitute the shape while the flow catcher 3 is constituted by plates 31 which do not constitute a surface of the primary shape as shown in the Figures.
  • the plates 31 may also be perforated in order to allow some through-put of water through the flow catcher 3.
  • the flow catcher 3 may also have other irregular shapes.
  • the flow catcher 3 has a shape or geometry which causes the flow catcher 3 to show substantially the same cross-sectional area relative to the flow direction of the water regardless of the wire 2 standing vertically in the water column or the wire 2 being carried sideways by the water current thus causing the wire 2 to be inclined.
  • the flow catcher 3 which is shown in Figure 2 is an example of such a flow catcher 3 where the cross-section is constant in the direction of current.
  • the cross-section of the flow catcher 3 will be circular regardless of how the flow catcher 3 is oriented in the water column.
  • a water column there may be water currents having different directions at the different depths as shown with arrows in the Figures 1 and 3.
  • the water currents will move the flow catchers 3 in different directions as shown in the Figures 1-3.
  • the flow catchers 3 will not be positioned along an imaginary straight vertical line or an imaginary inclined line.
  • the flow catchers 3 will dynamically take different positions which will vary with the flow direction and the flow intensity of the water current.
  • Feed pellets (not shown) which sink downwards in the same water column, will be influenced by the same water currents and be moved in the same direction as the flow catchers 3.
  • the instrument suspension 9 will follow the movement of the feed pellets downwards in the water column and the instrument 1 will be dynamically positioned where the feeding behaviour of the fish may best be observed.
  • the instrument suspension 9 may be connected to a feeding apparatus (not shown) inside of the net cage.
  • a first flow catcher 3' with a diameter of 20 cm is positioned and fastened to the wire 2 at a depth of 1 meter.
  • a second flow catcher 3" with a diameter of 15 cm is positioned and fastened to the wire 2 at a depth of 3 meters.
  • a third flow catcher 3"' with a diameter of 10 cm is positioned and fastened to the wire 2 at a depth of 5.5 metres.
  • the instrument 1 is fastened to the wire 2 at a depth of 8 meters. It has shown to be practical that the diameter of the flow catcher 3 decreases with depth along the wire 2.
  • a first flow catcher 3' with a diameter of 50 cm is positioned and fastened to the wire 2 at a depth of 1 meter.
  • a second flow catcher 3" with a diameter of 40 cm is positioned and fastened to the wire 2 at a depth of 3 meters.
  • a third flow catcher 3"' with a diameter of 35 cm is positioned and fastened to the wire 2 at a depth of 5.5 metres.
  • the instrument 1 is fastened to the wire 2 at a depth of 8 meters.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Catching Or Destruction (AREA)
  • Insulators (AREA)
  • Fluid-Damping Devices (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

Une suspension (9) instrument pour un instrument dived (1) dans laquelle l'instrument (1) est fixé à un fil (2) au-dessous d'un collecteur d'écoulement (3) dans lequel au moins deux capteurs d'écoulement 3) sont fixées le long du fil (2). L'invention concerne aussi l'utilisation du composite.
PCT/NO2015/050185 2014-10-07 2015-10-07 Instrument suspension pour un instrument dived et utilisation de cette suspension WO2016056923A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20141196 2014-10-07
NO20141196 2014-10-07

Publications (1)

Publication Number Publication Date
WO2016056923A1 true WO2016056923A1 (fr) 2016-04-14

Family

ID=55653424

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2015/050185 WO2016056923A1 (fr) 2014-10-07 2015-10-07 Instrument suspension pour un instrument dived et utilisation de cette suspension

Country Status (2)

Country Link
NO (1) NO338878B1 (fr)
WO (1) WO2016056923A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11464213B2 (en) 2017-06-28 2022-10-11 Observe Technologies Limited Decision making system and method of feeding aquatic animals

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050229864A1 (en) * 2003-08-26 2005-10-20 Claudio Chanceaulme Willemsen Method for monitoring and controlling in real-time the non-consumed food in fish farms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO180611C (no) * 1994-11-10 1997-05-21 Akva As Fremgangsmåte for å detektere fôrspill

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050229864A1 (en) * 2003-08-26 2005-10-20 Claudio Chanceaulme Willemsen Method for monitoring and controlling in real-time the non-consumed food in fish farms

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Kamerarør fra Akvapartner", Retrieved from the Internet <URL:http://akvaparner.no/produkter/kameraror> *
"Utstyrskatalogen 2014 fra Akvapartner", Retrieved from the Internet <URL:http://akvapartner.n/utstyskatalog-2014> *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11464213B2 (en) 2017-06-28 2022-10-11 Observe Technologies Limited Decision making system and method of feeding aquatic animals
EP3644717B1 (fr) * 2017-06-28 2023-08-16 Observe Technologies Limited Méthode de collecte de données pour nourrir des animaux aquatiques
US11925173B2 (en) 2017-06-28 2024-03-12 Observe Technologies Limited Data collection system and method for feeding aquatic animals

Also Published As

Publication number Publication date
NO338878B1 (no) 2016-10-31
NO20151337A1 (no) 2016-04-08

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