EP0972122B1 - Device for generating periodic waves in a basin - Google Patents

Device for generating periodic waves in a basin Download PDF

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Publication number
EP0972122B1
EP0972122B1 EP98913458A EP98913458A EP0972122B1 EP 0972122 B1 EP0972122 B1 EP 0972122B1 EP 98913458 A EP98913458 A EP 98913458A EP 98913458 A EP98913458 A EP 98913458A EP 0972122 B1 EP0972122 B1 EP 0972122B1
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EP
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Prior art keywords
shell
liquid
during
winch
waves
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EP98913458A
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German (de)
French (fr)
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EP0972122A1 (en
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Mehmet Zahit Inan
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/0006—Devices for producing waves in swimming pools

Definitions

  • the present invention relates to a device intended for create waves in a liquid, especially when it liquid is contained in a basin or swimming pool.
  • Such devices are used for example in swimming pools of amusement parks, but also in the test basins of naval and hydraulic constructions.
  • the invention also relates to a creation method waves exploiting the said device.
  • stability vertical of the device is not satisfactory. In particular, it can overturn when the mass mobile is in the high position relative to the hull.
  • the mass of the device must be significant to create appreciable vaques.
  • the weight of the device makes handling it difficult.
  • the organs intended to cause the relative movement of the two bodies must be sized to be able to move these large masses, which affects their cost.
  • the organs intended to cause relative movement are an integral part of the system. As such, they are subject to the environmental conditions of the liquid, and are liable to be damaged by the slightest defect sealing their case. In addition, they are hardly accessible for their maintenance.
  • the energy necessary to set in motion the bodies of the device must be transferred to it, for example to by means of an electric cable.
  • This cable is driven by repeated movements of the device. He is likely to wear out or break, and therefore presents a danger. Moreover, the presence of this cable in the liquid constitutes discomfort.
  • the energy necessary to set in motion the bodies of the device is stored within the device itself, by example in the form of electrical energy, in a battery, or pressure energy, in a tank. In this case need to periodically recharge the device is a disadvantage in its operation.
  • the object of the present invention is precisely to provide a device that does not have the disadvantages mentioned above. Its purpose is to provide a device for generating waves in a liquid which is easy to implement and operate, which consumes little of energy, whose organs put in the presence of liquid withstand the environment in which they are placed, which can be put into service in an existing basin without require infrastructure changes, and which can be easily removed to leave the basin in its original condition.
  • the invention relates to A creation device periodic waves in a liquid contained in a basin such as a swimming pool, comprising a body intended to be immersed at least partially in the liquid or on the surface of this and organs intended to cause movement vertical alternative of this body, the body being a hollow shell comprising a horizontal bottom and substantially vertical side walls and being intended to be at least partially filled with said liquid, characterized in that said shell is intended to be suspended by a connecting means flexible to a means capable of periodically performing the action of vertically lift said hull for a given period then let it come down again to generate the said waves periodic, said hull being intended to remain at least partially submerged in liquid and filled with liquid during these reciprocating movements, said means constituting said organs of the device.
  • the principle of the invention is to transfer energy to the liquid in phase with the kinetic energy of the wave.
  • the shell has a horizontal bottom and substantially vertical side walls. We thus favor the vertical movements of the water in the vicinity of the hull.
  • the shell may include an element of waterline.
  • the latter comprises a bottom provided with a plurality of holes. These holes are advantageously suitable for favor the penetration of the liquid into the shell, and disadvantage the exit.
  • the shell comprises a bell-shaped upper part with at least one air passage opening.
  • This or these passage openings air are advantageously able to encourage the exit of the air located at the top of the hull, and to disadvantage entry.
  • the means capable of periodically applying a force oriented upwards preferably comprises a winch intended to wind and unwind the connecting means.
  • This winch preferably includes a control box able to adjust the winding period and unwinding of the said winch and the engine torque thereof.
  • the engine torque applied to the winch during the hull descent time is preferably determined so as to maintain in permanently the connection means under tension.
  • FIG. 1 shows a basin 1 filled with a liquid 2, such as a swimming and leisure pool filled with water.
  • Pool 1 can be rectangular or round, or any other form.
  • a shell 3 is suspended within the pool 1 by a connecting means 4 which can be a cable, a strap, rope or chain.
  • a winch 5 comprises a drum 6 on which the means link 4 can be wound, and an electric motor 7.
  • Des pool water 1 periodic oscillations 1 are obtained by imposing a vertical reciprocating movement of the hull 3 in phase with the waves.
  • the period of this movement vertical alternative is determined experimentally from so as to excite a proper oscillation mode of the mass of water in the pool.
  • the amplitude of this movement alternative is determined so as to get waves of the desired amplitude.
  • the shell can be made of a light material, little expensive, and water resistant, such as polyester reinforced glass fibers.
  • a shape elongated rectangular is interesting in a swimming pool rectangular, and easily provides various modes transverse, longitudinal or combined oscillation of the water.
  • a shell 3 with vertical side walls; and thoroughly horizontal promotes the transfer to the liquid of movements vertical, and limits the turbulence generated by horizontal movements.
  • the angles of the shell 3 will be rounded.
  • a control and regulation unit 8 can be placed near the engine, or moved to a convenient location and accessible. This box allows the operator to introduce the desired values of the reciprocating period vertical imposed on hull 3, and the amplitude of the waves at produce.
  • the drum 6 includes a sensor 9 making it possible to measure its angular position, and deduce both the height from which the shell 3 is suspended and the speed of it.
  • a blocking brake 11 keeps the hull 3 in the raised position when the device is not used.
  • a reduction gear 10 adapts the rotation speed of the electric motor 7 at the desired speed for the drum 6. This reducer 10 transfers the torque to the drum engine during hull rise, and allows the drum to turn in the opposite direction when lowering the shell.
  • the shell 3 is advantageously provided with at least one hole 12 so that the water 2 from the pool can enter the within the shell 3.
  • the shell can be filled from above.
  • the water contained in the shell 3 gives the whole a mass which allows it, after being lifted by winch 5, to descend under the effect of its weight apparent.
  • the addition of buoyancy elements 13 allows to obtain that the hull, once submerged in the swimming pool, retains the ability to float. However, this is not at all necessary, and leaky hulls may be carried out without departing from the scope of the invention.
  • Holes 12 allow the shell 3 to cling to the liquid 2 for good stir it. They also prevent excessive movement of the shell 3 relative to the liquid 2.
  • the position of the shell 3 and the period of the movements alternatives imposed on it are determined experimentally so as to excite a mode of oscillation clean from pool 1, so as to get waves from the desired shape.
  • the excitement of one of the oscillation modes clean of the basin allows to obtain waves in the form standing waves, comprising nodes and bellies in fixed points in the pool, without energy input important.
  • the shell 3 is preferably placed in the vicinity of a belly of the desired oscillation mode. Movements of a particle of water in the vicinity of such a belly of the mode pool's own swing are mainly vertical.
  • the shell 3 preferably has walls vertical side, so that it does not impose on water surrounding movements with a horizontal component, which are not part of the desired oscillation mode, and are therefore a source of energy dissipation.
  • the motor 7 is preferably a current motor continuous and low voltage, meeting safety standards that apply to swimming pools. However, it can also be an AC motor or a pneumatic motor or hydraulic.
  • the motor current regulation is provided by the control and regulation box 8.
  • This control and regulation unit 8 makes it possible to determine the range of motion you want. It contains a regulator, for example of proportional-integral type, allowing the regulation of the current in the motor during the traction periods on the hull, in order to obtain the waves of desired amplitude.
  • the amplitude of the waves actually obtained can be inferred from the movements of the shell 3. In fact, it moves little with respect to the liquid surface. The movement of the shell 3 is determined by measuring the angular position of the drum.
  • the control and regulation unit 8 can also regulate the traction times and no traction on the hull.
  • the pulling time is substantially equal to the duration of absence of traction.
  • FIG. 2 represents an exemplary embodiment of the invention.
  • a support structure 14 makes it possible to install the winch 5 above the surface of the pool 1.
  • a such support structure 14 is required in open air swimming pools.
  • a diving board can be used at title of support structure 14.
  • Hull 3 is rectangular. Its length is 3 m and is oriented parallel to the side of a rectangular swimming pool 1.
  • the width of hull 3 is 0.75 m.
  • the weight of the hull is 45 kg.
  • the shell 3 is provided with a protective cover pointed or curved, high enough so that swimmers do not can't grab onto it or settle in.
  • Way to link 4 is a set of two belts fixed in points located on either side of the protective cover. This gives good stability to the shell 3.
  • the winch mechanism 5 specific to this application is shown in Figure 3. It includes a return pulley 15 free to rotate around a horizontal axis, and a drum 6 integral with the output shaft of the electric motor 7 or its reducer 10, on which are wound, superimposed, the two belts 4.
  • Figures 4, 5 and 6 show variants of the shell of a device according to the invention.
  • the shell shown in Figure 4 has a number important of 12 holes in its horizontal bottom.
  • these holes have a profile such as that shown in Figure 7, which promotes the penetration of the water in the hull during its descent, and disadvantages the exit of the water during its rise. Therefore, the water level in the hull 3, which varies at course of its alternative movements, is established at a higher level than it would have in the absence of such profile.
  • the hull is, in average value, deeper into the water. this allows apply a higher tensile force to the hull, without risk extracting it from water.
  • the side faces of the shell 3 are extended downwards by fins 16. These drifts 16 accentuate the suction effect during the upward movement.
  • the shell shown in Figure 5 has a open bottom, and is bell-shaped, open from the bottom and closed from above.
  • the upper part of this bell has one or more air passage openings 17.
  • this or these passage openings air 17 are provided with a valve as shown in Figure 8.
  • the locking ball 18 lifts and allows the air to exit when the hull is lowered. When it goes up, said ball 18 applies in his seat.
  • Said seat is provided with grooves 19, so that an air flow is still admitted during the mounting of the hull 3. In a manner analogous to the description above, this favors the exit of air and the penetration of the water in the hull during its descent, and disadvantages the entry of air and the exit of water during rise of it.
  • the water level in the shell 3 which varies during the reciprocating movements of this, is established at a level higher than that which would have in the absence of such a valve. It results from even that the shell 3 is, in average value, pressed more deep in the water. This also allows you to apply to the shell a higher pulling force, without risking to extract it from the water.
  • FIG. 6 represents a shell 3 having both the characteristics of the hulls represented in FIGS. 4 and 5, namely a perforated bottom, and a top shaped bet bell.
  • the drifts were not planned, for security reasons.
  • the device according to the invention can easily be installed in an existing swimming pool, without modifying its infrastructure.
  • the winch 5 and its control box can be fixed to the pool ceiling.
  • a structure 14 comprising a pole allows the shell 3 to be suspended at an appropriate point of the pelvis 1.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Toys (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

La présente invention concerne un dispositif destiné à créer des vagues dans un liquide, en particulier lorsque ce liquide est contenu dans un bassin ou une piscine. De tels dispositifs sont utilisés par exemple dans les piscines de parcs d'attraction, mais également dans les bassins d'essais de constructions navales et hydrauliques.The present invention relates to a device intended for create waves in a liquid, especially when it liquid is contained in a basin or swimming pool. Such devices are used for example in swimming pools of amusement parks, but also in the test basins of naval and hydraulic constructions.

L'invention concerne également une méthode de création de vagues exploitant le dit dispositif.The invention also relates to a creation method waves exploiting the said device.

On connaít, par le brevet US 3,789,612, une méthode de génération de vagues dans un volume d'eau.We know, from US Patent 3,789,612, a method of generating waves in a volume of water.

Dans une des variantes de cette méthode, on utilise un plongeur massif, auquel on applique un mouvement de va-et-vient vertical, afin de créer des vagues. Le plongeur requiert des moyens mécaniques importants pour le mouvoir et le guider.In one variant of this method, we use a massive plunger, to which a movement is applied vertical back and forth, to create waves. The diver requires mechanical means important to move and guide it.

Dans une autre variante de cette méthode, on utilise un réservoir à fond ouvert. Lorsque l'on soulève ce réservoir au-dessus de la surface de l'eau, le volume d'eau qu'il contient s'échappe brusquement, créant ainsi une perturbation. Ce système permet de créer une vague, mais pas un système de vagues entretenues.In another variant of this method, we use an open bottom tank. When we raise this tank above the water surface, the volume of water it contains suddenly escapes, creating thus a disturbance. This system creates a wave, but not a system of sustained waves.

On connaít par la demande internationale WO 91/14062 un système générateur de mouvements dans un liquide, en particulier à la surface de celui-ci. Ce système comprend un dispositif comportant deux corps dont l'un se déplace par rapport à l'autre. Ce déplacement relatif crée des forces d'inertie qui provoquent un déplacement de l'ensemble dans le liquide. Ce déplacement crée des excitations dans le liquide qui se transforment en vagues. Dans une forme d'exécution de ce système, l'un des corps est une sphère creuse à l'intérieur de laquelle se déplace le second corps. Un tel système permet effectivement de créer des vagues à la surface d'un liquide. Il présente cependant de nombreux inconvénients.We know from international application WO 91/14062 a motion generator system in a liquid, particular to the surface of it. This system includes a device comprising two bodies, one of which moves by compared to each other. This relative displacement creates forces of inertia which cause displacement of the assembly in the liquid. This displacement creates excitations in the liquid which turn into waves. In an embodiment of this system, one of the bodies is a hollow sphere at inside which the second body moves. Such system actually creates waves on the surface of a liquid. However, it has many disadvantages.

Tant dans la forme d'exécution où le dispositif est une sphère que dans d'autres formes d'exécution, la stabilité verticale du dispositif n'est pas satisfaisante. En particulier, celui-ci peut se renverser lorsque la masse mobile est en position haute par rapport à la coque.Both in the form of execution where the device is a sphere than in other embodiments, stability vertical of the device is not satisfactory. In particular, it can overturn when the mass mobile is in the high position relative to the hull.

Les forces d'inertie étant proportionnelles à la masse en mouvement, la masse du dispositif doit être importante pour créer des vaques appréciables. Le poids du dispositif rend la manipulation de celui-ci difficile. De plus, les organes destinés à provoquer le mouvement relatif des deux corps doivent être dimensionnés pour pouvoir déplacer ces masses importantes, ce qui a une incidence sur leur coût.The inertial forces being proportional to the mass in motion, the mass of the device must be significant to create appreciable vaques. The weight of the device makes handling it difficult. Moreover, the organs intended to cause the relative movement of the two bodies must be sized to be able to move these large masses, which affects their cost.

Lorsque un corps mobile est animé d'un mouvement harmonique d'amplitude fixe, par exemple lorsque celui ci est réalisé au moyen d'un système bielle-manivelle, la force d'inertie engendrée est proportionnelle à la masse, et au carré de la fréquence du mouvement. Il n'est donc pas possible de régler cette force d'excitation indépendamment de la fréquence, ou inversement, il n'est pas possible de faire varier la fréquence sans modifier la force d'excitation. Au démarrage, il est impossible de faire croítre la force d'excitation progressivement avant d'atteindre un état de régime.When a moving body is animated by a movement harmonic of fixed amplitude, for example when this is achieved by means of a connecting rod-crank system, the force of inertia generated is proportional to the mass, and to the square of the frequency of movement. It is therefore not possible to adjust this excitation force independently of frequency, or vice versa, it is not possible to do vary the frequency without modifying the excitation force. At starting, it is impossible to increase the force of excitement gradually before reaching a state of diet.

Les organes destinés à provoquer le mouvement relatif font partie intégrante du dispositif. A ce titre, ils sont soumis aux conditions d'environnement du liquide, et sont susceptibles d'être endommagés par le moindre défaut d'étanchéité de leur boítier. De plus, ils sont difficilement accessibles pour leur entretien.The organs intended to cause relative movement are an integral part of the system. As such, they are subject to the environmental conditions of the liquid, and are liable to be damaged by the slightest defect sealing their case. In addition, they are hardly accessible for their maintenance.

Dans une forme de réalisation. de ce dispositif, l'énergie nécessaire à la mise en mouvement des corps du dispositif doit être transférée à celui-ci, par exemple au moyen d'un câble électrique. Ce câble est entraíné par les mouvements répétés du dispositif. Il est susceptible de s'user ou de se rompre, et présente donc un danger. De plus, la présence de ce câble dans le liquide constitue une gêne.In one embodiment. of this device, the energy necessary to set in motion the bodies of the device must be transferred to it, for example to by means of an electric cable. This cable is driven by repeated movements of the device. He is likely to wear out or break, and therefore presents a danger. Moreover, the presence of this cable in the liquid constitutes discomfort.

Dans une autre forme de réalisation de ce dispositif, l'énergie nécessaire à la mise en mouvement des corps du dispositif est stockée au sein même du dispositif, par exemple sous forme d'énergie électrique, dans une batterie, ou d'énergie de pression, dans un réservoir. Dans ce cas, la nécessité de recharger périodiquement le dispositif est un inconvénient dans son exploitation.In another embodiment of this device, the energy necessary to set in motion the bodies of the device is stored within the device itself, by example in the form of electrical energy, in a battery, or pressure energy, in a tank. In this case need to periodically recharge the device is a disadvantage in its operation.

On connaít également, par exemple par EP 0 236 653, ou EP 0 732 468, des générateurs de vagues basés sur des principes divers, mais nécessitant tous une adaptation importante du bassin. Ces dispositifs ne sont donc pas adaptés à la génération de vagues dans des piscines existantes.We also know, for example from EP 0 236 653, or EP 0 732 468, wave generators based on various principles, but all requiring adaptation important basin. These devices are therefore not suitable for generating waves in swimming pools existing.

La présente invention a précisément pour but de fournir un dispositif qui ne présente pas les inconvénients mentionnés ci-dessus. Elle a pour but de fournir un dispositif de génération de vagues dans un liquide qui soit aisé à mettre en oeuvre et à exploiter, qui consomme peu d'énergie, dont les organes mis en présence du liquide résistent bien à l'environnement dans lequel ils sont placés, qui puisse être mis en service dans un bassin existant sans nécessiter de modifications de l'infrastructure, et qui puisse être aisément enlevé pour laisser le bassin dans son état original. The object of the present invention is precisely to provide a device that does not have the disadvantages mentioned above. Its purpose is to provide a device for generating waves in a liquid which is easy to implement and operate, which consumes little of energy, whose organs put in the presence of liquid withstand the environment in which they are placed, which can be put into service in an existing basin without require infrastructure changes, and which can be easily removed to leave the basin in its original condition.

L'invention porte sur Un dispositif de création de vagues périodiques dans un liquide contenu dans un bassin tel qu'une piscine, comprenant un corps destiné à être immergé au moins partiellement dans le liquide ou à la surface de celui-ci et des organes destinés à provoquer un mouvement alternatif vertical de ce corps, le corps étant une coque creuse comprenant un fond horizontal et des parois latérales en substance verticales et étant destinée à être remplie au moins partiellement du dit liquide, caractérisé en ce que la dite coque est destinée à être suspendue par un moyen de liaison flexible à un moyen apte à exécuter périodiquement l'action de soulever verticalement la dite coque pendant une durée donnée puis de la laisser redescendre pour engendrer les dites vagues périodiques, la dite coque étant destinée à rester au moins partiellement immergée dans le liquide et remplie du liquide au cours de ces mouvements alternatifs, lesdits moyens constituant lesdits organes du dispositif.The invention relates to A creation device periodic waves in a liquid contained in a basin such as a swimming pool, comprising a body intended to be immersed at least partially in the liquid or on the surface of this and organs intended to cause movement vertical alternative of this body, the body being a hollow shell comprising a horizontal bottom and substantially vertical side walls and being intended to be at least partially filled with said liquid, characterized in that said shell is intended to be suspended by a connecting means flexible to a means capable of periodically performing the action of vertically lift said hull for a given period then let it come down again to generate the said waves periodic, said hull being intended to remain at least partially submerged in liquid and filled with liquid during these reciprocating movements, said means constituting said organs of the device.

Le principe de l'invention est de transférer de l'énergie au liquide en phase avec l'énergie cinétique propre de la vague. The principle of the invention is to transfer energy to the liquid in phase with the kinetic energy of the wave.

La coque comprend un fond horizontal et des parois latérales en substance verticale. On favorise ainsi les mouvements verticaux de l'eau au voisinage de la coque.The shell has a horizontal bottom and substantially vertical side walls. We thus favor the vertical movements of the water in the vicinity of the hull.

Afin que la coque se remplisse d'eau lorsqu'elle est placée dans l'eau, un simple trou peut être prévu à la partie inférieure de la coque. La coque peut comprendre un élément de flottaison.So that the hull fills with water when it is placed in the water, a simple hole can be provided in the game bottom of the hull. The shell may include an element of waterline.

Dans une forme d'exécution de la coque du dispositif suivant l'invention, celle-ci comprend un fond muni d'une pluralité de trous. Ces trous sont avantageusement aptes à favoriser la pénétration du liquide dans la coque, et à en défavoriser la sortie.In one embodiment of the device shell according to the invention, the latter comprises a bottom provided with a plurality of holes. These holes are advantageously suitable for favor the penetration of the liquid into the shell, and disadvantage the exit.

Dans une autre forme d'exécution, la coque comprend une partie supérieure en forme de cloche, munie d'au moins une ouverture de passage de l'air. Ce ou ces ouvertures de passage de l'air sont avantageusement aptes à favoriser la sortie de l'air situé à la partie supérieure de la coque, et à en défavoriser l'entrée.In another embodiment, the shell comprises a bell-shaped upper part with at least one air passage opening. This or these passage openings air are advantageously able to encourage the exit of the air located at the top of the hull, and to disadvantage entry.

On peut également réaliser une coque comportant les caractéristiques des deux formes de réalisation précitées.It is also possible to produce a shell comprising the characteristics of the two abovementioned embodiments.

Le moyen apte à appliquer périodiquement une force orientée vers le haut comporte préférentiellement un treuil destiné à enrouler et a dérouler le moyen de liaison. Ce treuil comporte préférentiellement un boítier de régulation apte à régler la période d'enroulement et de déroulement du dit treuil et le couple moteur de celui-ci.The means capable of periodically applying a force oriented upwards preferably comprises a winch intended to wind and unwind the connecting means. This winch preferably includes a control box able to adjust the winding period and unwinding of the said winch and the engine torque thereof.

L'invention porte encore sur un procédé de création de vagues périodiques au moyen du dispositif décrit ci-dessus dans lequel on suspend la coque en un point du bassin par le moyen dé liaison flexible, la dite coque étant au moins partiellement immergée dans le liquide et remplie de ce liquide, on exécute périodiquement l'action de soulever la dite coque pendant une durée donnée puis de la laisser redescendre, par l'intermédiaire du dit moyen de liaison flexible, pour engendrer les dites vagues périodiques,

  • la dite coque restant au moins partiellement immergée dans le liquide et remplie du liquide au cours de ces mouvements alternatifs.
The invention also relates to a method of creating periodic waves by means of the device described above in which the shell is suspended at a point in the basin by the flexible connection means, said shell being at least partially immersed in the liquid. and filled with this liquid, the action of lifting said shell is periodically carried out for a given period of time then of allowing it to descend again, by means of said flexible connection means, to generate said periodic waves,
  • said shell remaining at least partially immersed in the liquid and filled with liquid during these reciprocating movements.

Dans ce procédé, on détermine préférentiellement la périodicité des mouvements imposés à la coque de manière à exciter une fréquence propre d'oscillation du liquide contenu dans le bassin, et le couple moteur appliqué au treuil pendant la durée de soulèvement de la coque de manière à obtenir des vagues de l'amplitude souhaitée. Le couple moteur appliqué au treuil pendant la durée de descente de la coque est de préférence déterminé de manière à maintenir en permanence le moyen de liaison sous tension.In this process, the periodicity of movements imposed on the hull so as to excite a natural frequency of oscillation of the contained liquid in the basin, and the engine torque applied to the winch during the hull lifting period so that get waves of the desired amplitude. The engine torque applied to the winch during the hull descent time is preferably determined so as to maintain in permanently the connection means under tension.

D'autres caractéristiques et avantages de l'invention apparaítront à la lecture de la description qui suit, référence étant faite aux figures annexées.

  • La figure 1 est une vue schématique en coupe d'un bassin muni d'un dispositif suivant l'invention.
  • La figure 2 est une vue en perspective cavalière d'une forme d'exécution d'un dispositif suivant l'invention.
  • La figure 3 est une vue de détail du mécanisme de tambour représenté à la figure 2.
  • Les figures 4, 5 et 6 sont des vues en coupe de trois variantes de la coque d'un dispositif suivant l'invention.
  • La figure 7 est une vue de détail et en coupe d'une variante du fond perforé des coques représentées aux figures 4 et 6.
  • La figure 8 est une vue de détail et en coupe d'une variante de l'ouverture des coques représentées aux figures 5 et 6.
    • Other characteristics and advantages of the invention will appear on reading the description which follows, reference being made to the appended figures.
  • Figure 1 is a schematic sectional view of a basin provided with a device according to the invention.
  • Figure 2 is a perspective view of an embodiment of a device according to the invention.
  • FIG. 3 is a detailed view of the drum mechanism shown in FIG. 2.
  • Figures 4, 5 and 6 are sectional views of three variants of the shell of a device according to the invention.
  • FIG. 7 is a detail view in section of a variant of the perforated bottom of the shells shown in FIGS. 4 and 6.
  • FIG. 8 is a detail view in section of a variant of the opening of the shells shown in FIGS. 5 and 6.

    • La figure 1 montre un bassin 1 rempli d'un liquide 2, telle qu'une piscine de natation et d'agrément remplie d'eau. La piscine 1 peut être rectangulaire ou ronde, ou de toute autre forme. Une coque 3 est suspendue au sein de la piscine 1 par un moyen de liaison 4 qui peut être un câble, une courroie, une corde ou une chaíne.FIG. 1 shows a basin 1 filled with a liquid 2, such as a swimming and leisure pool filled with water. Pool 1 can be rectangular or round, or any other form. A shell 3 is suspended within the pool 1 by a connecting means 4 which can be a cable, a strap, rope or chain.

    Un treuil 5 comporte un tambour 6 sur lequel le moyen de liaison 4 peut s'enrouler, et un moteur électrique 7. Des oscillations périodiques de l'eau 2 de la piscine 1 sont obtenues en imposant un mouvement alternatif vertical de la coque 3 en phase avec les vagues. La période de ce mouvement alternatif vertical est déterminée expérimentalement de manière à exciter un mode d'oscillation propre de la masse d'eau contenue dans la piscine. L'amplitude de ce mouvement alternatif est déterminée de manière à obtenir des vagues de l'amplitude souhaitée.A winch 5 comprises a drum 6 on which the means link 4 can be wound, and an electric motor 7. Des pool water 1 periodic oscillations 1 are obtained by imposing a vertical reciprocating movement of the hull 3 in phase with the waves. The period of this movement vertical alternative is determined experimentally from so as to excite a proper oscillation mode of the mass of water in the pool. The amplitude of this movement alternative is determined so as to get waves of the desired amplitude.

    La coque peut être réalisée en un matériau léger, peu coûteux, et résistant à l'eau, tel que le polyester armé de fibres de verre. On peut donner à la coque 3 diverses formes, par exemple parallélépipédique. Une forme parallélipipédique allongée est intéressante dans une piscine rectangulaire, et permet aisément d'obtenir divers modes transversaux, longitudinaux ou combinés d'oscillation de l'eau. Une coque 3 à parois latérales verticales; et à fond horizontal favorise le transfert au liquide de mouvements verticaux, et limite les turbulences engendrées par des mouvements horizontaux. Dans le cas où le dispositif est utilisé dans une piscine d'agrément, on donne à la coque 3 une forme telle qu'elle présente le moindre risque pour les nageurs. Les angles de la coque 3 seront arrondis.The shell can be made of a light material, little expensive, and water resistant, such as polyester reinforced glass fibers. We can give the hull 3 different shapes, for example parallelepiped. A shape elongated rectangular is interesting in a swimming pool rectangular, and easily provides various modes transverse, longitudinal or combined oscillation of the water. A shell 3 with vertical side walls; and thoroughly horizontal promotes the transfer to the liquid of movements vertical, and limits the turbulence generated by horizontal movements. In case the device is used in a pleasure pool, we give the hull 3 a form such that it presents the least risk for swimmers. The angles of the shell 3 will be rounded.

    Un boítier de commande et de régulation 8 peut être placé à proximité du moteur, ou déporté en un endroit commode et accessible. Ce boítier permet à l'opérateur d'introduire les valeurs souhaitées de la période du mouvement alternatif vertical imposé à la coque 3, et de l'amplitude des vagues à produire. Le tambour 6 comporte un capteur 9 permettant de mesurer sa position angulaire, et d'en déduire à la fois la hauteur à laquelle est suspendue la coque 3 et la vitesse de celle-ci. Un frein de blocage 11 permet de maintenir la coque 3 en position relevée lorsque le dispositif n'est pas utilisé. Un réducteur 10 adapte la vitesse de rotation du moteur électrique 7 à la vitesse de rotation souhaitée pour le tambour 6. Ce réducteur 10 transfère au tambour le couple moteur pendant la montée de la coque, et autorise le tambour à tourner dans le sens inverse lors de la descente de la coque.A control and regulation unit 8 can be placed near the engine, or moved to a convenient location and accessible. This box allows the operator to introduce the desired values of the reciprocating period vertical imposed on hull 3, and the amplitude of the waves at produce. The drum 6 includes a sensor 9 making it possible to measure its angular position, and deduce both the height from which the shell 3 is suspended and the speed of it. A blocking brake 11 keeps the hull 3 in the raised position when the device is not used. A reduction gear 10 adapts the rotation speed of the electric motor 7 at the desired speed for the drum 6. This reducer 10 transfers the torque to the drum engine during hull rise, and allows the drum to turn in the opposite direction when lowering the shell.

    La coque 3 est avantageusement munie d'au moins un trou 12 de telle sorte que l'eau 2 de la piscine puisse rentrer au sein de la coque 3. En variante, la coque peut être remplie par le dessus. L'eau contenue dans la coque 3 confère à l'ensemble une masse qui lui permet, après avoir été soulevé par le treuil 5, de redescendre sous l'effet de son poids apparent. L'addition d'éléments de flottaison 13 permet d'obtenir que la coque, une fois immergée dans la piscine, conserve la capacité de flotter. Ceci n'est cependant en rien nécessaire, et des coques susceptibles de couler peuvent être réalisées sans sortir du cadre de l'invention. Les trous 12 permettent à la coque 3 de s'accrocher au liquide 2 pour bien le remuer. Ils empêchent également les mouvements excessifs de la coque 3 par rapport au liquide 2.The shell 3 is advantageously provided with at least one hole 12 so that the water 2 from the pool can enter the within the shell 3. Alternatively, the shell can be filled from above. The water contained in the shell 3 gives the whole a mass which allows it, after being lifted by winch 5, to descend under the effect of its weight apparent. The addition of buoyancy elements 13 allows to obtain that the hull, once submerged in the swimming pool, retains the ability to float. However, this is not at all necessary, and leaky hulls may be carried out without departing from the scope of the invention. Holes 12 allow the shell 3 to cling to the liquid 2 for good stir it. They also prevent excessive movement of the shell 3 relative to the liquid 2.

    La position de la coque 3 et la période des mouvements alternatifs imposés à celle-ci sont déterminés expérimentalement de manière à exciter un mode d'oscillation propre de la piscine 1, de manière à obtenir des vagues de la forme souhaitée. L'excitation d'un des modes d'oscillation propres du bassin permet d'obtenir des vagues sous forme d'ondes stationnaires, comportant des noeuds et des ventres en des points fixes de la piscine, sans apport d'énergie important. La coque 3 est de préférence placée au voisinage d'un ventre du mode d'oscillation souhaité. Les mouvements d'une particule d'eau au voisinage d'un tel ventre du mode d'oscillation propre de la piscine sont principalement verticaux. La coque 3 comporte préférentiellement des parois latérales verticales, de sorte qu'elle n'impose pas à l'eau environnante des mouvements ayant une composante horizontale, qui ne font pas partie du mode d'oscillation souhaité, et sont donc source de dissipation d'énergie.The position of the shell 3 and the period of the movements alternatives imposed on it are determined experimentally so as to excite a mode of oscillation clean from pool 1, so as to get waves from the desired shape. The excitement of one of the oscillation modes clean of the basin allows to obtain waves in the form standing waves, comprising nodes and bellies in fixed points in the pool, without energy input important. The shell 3 is preferably placed in the vicinity of a belly of the desired oscillation mode. Movements of a particle of water in the vicinity of such a belly of the mode pool's own swing are mainly vertical. The shell 3 preferably has walls vertical side, so that it does not impose on water surrounding movements with a horizontal component, which are not part of the desired oscillation mode, and are therefore a source of energy dissipation.

    Le moteur 7 est de préférence un moteur à courant continu et à basse tension, respectant les normes de sécurité qui s'appliquent aux piscines. Il peut cependant également être un moteur à courant alternatif ou un moteur pneumatique ou hydraulique. La régulation du courant du moteur est assurée par le boítier de commande et de régulation 8. Ce boítier de commande et de régulation 8 permet de déterminer l'amplitude du mouvement que l'on souhaite. Il contient un régulateur, par exemple de type proportionnel-intégral, permettant la régulation du courant dans le moteur pendant les période de traction sur la coque, afin d'obtenir les vagues d'amplitude souhaitée. L'amplitude des vagues effectivement obtenues peut être déduite des mouvements de la coque 3. En effet, celle-ci se déplace peu par rapport à la surface du liquide. Le mouvement de la coque 3 est déterminé en mesurant la position angulaire du tambour.The motor 7 is preferably a current motor continuous and low voltage, meeting safety standards that apply to swimming pools. However, it can also be an AC motor or a pneumatic motor or hydraulic. The motor current regulation is provided by the control and regulation box 8. This control and regulation unit 8 makes it possible to determine the range of motion you want. It contains a regulator, for example of proportional-integral type, allowing the regulation of the current in the motor during the traction periods on the hull, in order to obtain the waves of desired amplitude. The amplitude of the waves actually obtained can be inferred from the movements of the shell 3. In fact, it moves little with respect to the liquid surface. The movement of the shell 3 is determined by measuring the angular position of the drum.

    Le boítier de commande et de régulation 8 peut également effectuer la régulation des durées de traction et d'absence de traction sur la coque. La durée de traction est sensiblement égale à la durée d'absence de traction.The control and regulation unit 8 can also regulate the traction times and no traction on the hull. The pulling time is substantially equal to the duration of absence of traction.

    Pour démarrer un régime de vagues, en partant d'une surface de liquide calme, on appliquera à la coque 3 des efforts de traction faibles, puis croissants, jusqu'à obtenir l'amplitude de vagues souhaitée.To start a wave regime, starting from a calm liquid surface, we will apply to shell 3 low tensile forces, then increasing, until obtaining the desired wave amplitude.

    La figure 2 représente un exemple de réalisation de l'invention. Une structure de support 14 permet d'installer le treuil 5 au dessus de la surface de la piscine 1. Une telle structure de support 14 est nécessaire dans les piscines à ciel ouvert. Un plongeoir peut être utilisé à titre de structure de support 14. Lorsque la dite structure de support est conçue pour pouvoir être déplacée, il est possible de choisir aisément le point d'application de l'excitation donnée à la surface du liquide 2, et d'influencer ainsi la forme des vagues obtenues. La coque 3 est rectangulaire. Sa longueur est de 3 m et est orientée parallèlement au petit coté d'un piscine rectangulaire 1. La largeur de la coque 3 est de 0.75 m. Le poids de la coque est de 45 kg. La coque 3 est munie d'un couvercle de protection pointu ou bombé, suffisamment élevé, pour que les nageurs ne puissent pas s'y agripper ou s'y installer. Le moyen de liaison 4 est un ensemble de deux courroies fixées en des points situés de part et d'autres du couvercle de protection. On obtient ainsi une bonne stabilité de la coque 3. Le mécanisme de treuil 5 spécifique à cette application est représenté à la figure 3. Il comporte une poulie de renvoi 15 libre de tourner autour d'un axe horizontal, et un tambour 6 solidaire de l'arbre de sortie du moteur électrique 7 ou de son réducteur 10, sur lequel s'enroulent, en se superposant, les deux courroies 4.FIG. 2 represents an exemplary embodiment of the invention. A support structure 14 makes it possible to install the winch 5 above the surface of the pool 1. A such support structure 14 is required in open air swimming pools. A diving board can be used at title of support structure 14. When said structure support is designed to be movable, it is easy to choose the point of application of the excitation given to the surface of the liquid 2, and thus influencing the shape of the waves obtained. Hull 3 is rectangular. Its length is 3 m and is oriented parallel to the side of a rectangular swimming pool 1. The width of hull 3 is 0.75 m. The weight of the hull is 45 kg. The shell 3 is provided with a protective cover pointed or curved, high enough so that swimmers do not can't grab onto it or settle in. Way to link 4 is a set of two belts fixed in points located on either side of the protective cover. This gives good stability to the shell 3. The winch mechanism 5 specific to this application is shown in Figure 3. It includes a return pulley 15 free to rotate around a horizontal axis, and a drum 6 integral with the output shaft of the electric motor 7 or its reducer 10, on which are wound, superimposed, the two belts 4.

    Les figures 4, 5 et 6 représentent des variantes de la coque d'un dispositif suivant l'invention.Figures 4, 5 and 6 show variants of the shell of a device according to the invention.

    La coque représentée à la figure 4 comporte un nombre important de trous 12 dans son fond horizontal. Dans une variante préférée, ces trous ont un profil tel que celui représenté à la figure 7, qui favorise la pénétration de l'eau dans la coque pendant la descente de celle-ci, et défavorise la sortie de l'eau pendant la montée de celle-ci. De ce fait, le niveau de l'eau dans la coque 3, qui varie au cours des mouvements alternatifs de celle-ci, s'établit à un niveau supérieur à celui qu'il aurait en l'absence d'un tel profil. Il en résulte que la coque est, en valeur moyenne, enfoncée plus profondément dans l'eau. Ceci permet d'appliquer à la coque une force de traction supérieure, sans risquer d'extraire celle-ci de l'eau. Les faces latérales de la coque 3 sont prolongées vers le bas par des dérives 16. Ces dérives 16 accentuent l'effet d'aspiration pendant le mouvement ascendant.The shell shown in Figure 4 has a number important of 12 holes in its horizontal bottom. In preferred variant, these holes have a profile such as that shown in Figure 7, which promotes the penetration of the water in the hull during its descent, and disadvantages the exit of the water during its rise. Therefore, the water level in the hull 3, which varies at course of its alternative movements, is established at a higher level than it would have in the absence of such profile. As a result, the hull is, in average value, deeper into the water. this allows apply a higher tensile force to the hull, without risk extracting it from water. The side faces of the shell 3 are extended downwards by fins 16. These drifts 16 accentuate the suction effect during the upward movement.

    La coque représentée à la figure 5 comporte un fond ouvert, et est en forme de cloche, ouverte par le bas et fermée par le dessus. La partie supérieure de cette cloche comporte une ou plusieurs ouvertures de passage de l'air 17. Dans une variante préférée, ce ou ces ouvertures de passage de l'air 17 sont munis d'une soupape telle que représenté à la figure 8. Dans celle-ci, la bille de blocage 18 se soulève et permet la sortie de l'air lors de la descente de la coque. Lors de la remontée de celle-ci, la dite bille 18 s'applique sur son siège. Le dit siège est muni de cannelures 19, de sorte qu'un débit d'air est malgré tout admis lors de la montée de la coque 3. De manière analogue à l'exposé ci-dessus, ceci favorise la sortie de l'air et la pénétration de l'eau dans la coque pendant la descente de celle-ci, et défavorise l'entrée de l'air et la sortie de l'eau pendant la montée de celle-ci. De ce fait, le niveau de l'eau dans la coque 3, qui varie au cours des mouvements alternatifs de celle-ci, s'établit à un niveau supérieur à celui qu'il aurait en l'absence d'une telle soupape. Il en résulte de même que la coque 3 est, en valeur moyenne, enfoncée plus profondément dans l'eau. Ceci permet également d'appliquer à la coque une force de traction supérieure, sans risquer d'extraire celle-ci de l'eau.The shell shown in Figure 5 has a open bottom, and is bell-shaped, open from the bottom and closed from above. The upper part of this bell has one or more air passage openings 17. In a preferred variant, this or these passage openings air 17 are provided with a valve as shown in Figure 8. In it, the locking ball 18 lifts and allows the air to exit when the hull is lowered. When it goes up, said ball 18 applies in his seat. Said seat is provided with grooves 19, so that an air flow is still admitted during the mounting of the hull 3. In a manner analogous to the description above, this favors the exit of air and the penetration of the water in the hull during its descent, and disadvantages the entry of air and the exit of water during rise of it. As a result, the water level in the shell 3, which varies during the reciprocating movements of this, is established at a level higher than that which would have in the absence of such a valve. It results from even that the shell 3 is, in average value, pressed more deep in the water. This also allows you to apply to the shell a higher pulling force, without risking to extract it from the water.

    La figure 6 représente une coque 3 présentant à la fois les caractéristiques des coques représentées au figures 4 et 5, à savoir un fond perforé, et une parie supérieure en forme de cloche. Dans cet exemple, les dérives n'ont pas été prévues, pour des raisons de sécurité.FIG. 6 represents a shell 3 having both the characteristics of the hulls represented in FIGS. 4 and 5, namely a perforated bottom, and a top shaped bet bell. In this example, the drifts were not planned, for security reasons.

    Les formes d'exécution décrites ci-dessus avec référence aux dessins sont des exemples non limitatifs du dispositif suivant l'invention.The embodiments described above with reference to the drawings are nonlimiting examples of the device according to the invention.

    Le dispositif suivant l'invention peut aisément être installé dans une piscine existante, sans modifier son infrastructure. Dans le cas d'une piscine 1 couverte, le treuil 5 et son boítier de commande peuvent être fixés au plafond de la piscine. En variante, une ou plusieurs poulies de renvoi permettent d'installer le boítier de commande au bord de la piscine 1 ou dans un local voisin. Dans le cas d'une piscine à ciel ouvert, une structure 14 comportant une perche permet de suspendre la coque 3 en un point approprié du bassin 1.The device according to the invention can easily be installed in an existing swimming pool, without modifying its infrastructure. In the case of a covered swimming pool 1, the winch 5 and its control box can be fixed to the pool ceiling. Alternatively, one or more pulleys to allow the control unit to be installed in the poolside 1 or in a neighboring room. In the case of an open air swimming pool, a structure 14 comprising a pole allows the shell 3 to be suspended at an appropriate point of the pelvis 1.

    Claims (15)

    1. Device generating periodical waves in a liquid (2) contained in a pond (1) such as a swimming pool, comprising a body to be periodically at least partially submersed within the liquid or at the surface thereof and elements for provoking a reciprocating vertical motion of this body, the body being a hollow shell (3) comprising a horizontal bottom side and substantially vertical side walls, said shell being intended to being filled at least partially with the said liquid (2) characterized in that the said shell (3) is intended to be connected by bendable linking means (4) to means capable of periodically carrying the action of vertically raising said shell (3) during a during a given time then allowing said shell (3) to fall down , so as to generate said periodical waves , said shell (3) being intended to stay at least partially submersed in the liquid and filled with said liquid during the reciprocating movements, said means constituting the elements of the device.
    2. Device according to claim 1, characterized in that the shell (3) comprises at least one hole (12) allowing entry of the liquid (2) into the shell (3).
    3. Device according to any one of the preceding claims, characterized in that the shell (3) contains a floating element (13).
    4. Device according to any one of the preceding claims, characterized in that the shell (3) comprises a bottom side with several holes (12).
    5. Device according to claim 4, characterized in that the holes (12) are able to favor the penetration of the liquid (2) into the shell (3), and to disfavor its exit.
    6. Device according to one of the preceding claims, characterized in that the shell (3) comprises an upper part in the form of a dish-cover, equipped with at least one air flow aperture (17).
    7. Device according to claim 6, characterized in that an air flow aperture (17) is able to favor the exit of the air located in the upper part of the shell (3), and to disfavor its penetration.
    8. Device according to one of the preceding claims, characterized in that the means capable of periodically carrying the action of vertically raising said shell (3) during a given time then allowing said shell (3) to fall down , so as to generate said periodical waves , comprises a winch (5) that rolls and unrolls the bendable linking means (4).
    9. Device according to claim 8, characterized in that the winch (5) comprises a regulation box (8) able to adjust the rolling and unrolling periods of said winch (5).
    10. Device according to one of claims 8 or 9, characterized in that the winch (5) comprises a regulation box (8) able to adjust its motor torque.
    11. Periodical wave creation process in a liquid (2) contained in a pond (1) such as a pool using a device according to one of claims 1 to 10, characterized in that it comprises the following operations :
      one suspends the hollow shell (3) by the bendable linking means (4) at a point of the pond (1), at least partially submersed within the liquid or at the surface thereof the said shell (3) being at least partially immersed in the said pond (1)and filled with the liquid (2);
      one periodically carries the action of vertically raising said shell (3) during a given time then allowing said shell (3) to fall down, using the bendable linking means (4) , so as to generate said periodical waves
      said shell (3) staying at least partially submersed in the liquid and filled with said liquid during the reciprocating movements.
    12. Process according to claim 11, characterized in that the means capable of periodically carrying the action of vertically raising said shell (3) during a given time then allowing said shell (3) to fall down , so as to generate said periodical waves , comprises a winch (5) that rolls and unrolls the bendable linking means (4).
    13. Process according to any one of claims 11 and 12, characterized in that the periodicity of the movements imposed to the shell (3) are determined in a way to excite a natural oscillation frequency of the liquid (2) contained in the pond (1).
    14. Process according to any one of claims 12 or 13, characterized in that the motor torque applied to the winch (5) during the lifting period of the shell (3) is determined in a way to have the waves with the wanted amplitude.
    15. Process according to one of claims 12 to 14, characterized in that the motor torque applied to the winch (5) during the falling period of the shell (3) is determined in a way to permanently maintain the bendable linking means (4) under stress.
    EP98913458A 1997-04-03 1998-04-02 Device for generating periodic waves in a basin Expired - Lifetime EP0972122B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    BE9700304 1997-04-03
    BE9700304A BE1011083A6 (en) 1997-04-03 1997-04-03 Wave generator for liquids.
    PCT/BE1998/000046 WO1998045553A1 (en) 1997-04-03 1998-04-02 Wave machine for liquids

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    EP0972122A1 EP0972122A1 (en) 2000-01-19
    EP0972122B1 true EP0972122B1 (en) 2004-02-11

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    EP (1) EP0972122B1 (en)
    AU (1) AU6815398A (en)
    BE (1) BE1011083A6 (en)
    DE (1) DE69821606T2 (en)
    ES (1) ES2217543T3 (en)
    WO (1) WO1998045553A1 (en)

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    BR112016028880B1 (en) * 2014-06-08 2022-01-04 Surf Lakes Holdings Ltd WAVE POOL
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    JP2020507701A (en) * 2016-12-23 2020-03-12 グランサム，ピーター Assembly and method for generating waves in a body of water
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    EP0972122A1 (en) 2000-01-19
    US6217256B1 (en) 2001-04-17
    AU6815398A (en) 1998-10-30
    ES2217543T3 (en) 2004-11-01
    DE69821606D1 (en) 2004-03-18
    DE69821606T2 (en) 2005-01-05
    BE1011083A6 (en) 1999-04-06
    WO1998045553A1 (en) 1998-10-15

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