System for modifying the movement of jellyfish in marine environments

Abstract

The invention relates to a system for modifying the movement of jellyfish in marine environments, which is based on jellyfish behaviour in the presence of electromagnetic (EM) fields and prevents jellyfish from reaching protected areas. The invention is based on a system that comprises coils, which are disposed vertically using a buoy, a chain and a weight and generate EM fields that stun the jellyfish, displacing same motionless under the additional action of water currents. The jellyfish recover their mobility once away from the magnetic field. The coils generate an EM field, being powered by a microcontroller and a sinusoidal signal generator. The buoy contains the electronics necessary to capture, store and regulate energy, as well as the microcontroller and the signal generator, which generates a signal of at least 3.3 V with a frequency of 400-800 kHz.

Description

[0001] SYSTEM FOR MODIFYING THE MOVEMENT OF JELLYFISH IN MARINE ENVIRONMENTS

[0002]

[0003] TECHNICAL SECTOR

[0004] The present invention relates to a system for altering the movement of jellyfish that are sensitive to electromagnetic fields; therefore, the present invention falls within the field of Marine Biology, specifically in devices that modify the behavior of marine invertebrate animals.

[0005] PRIOR ART

[0006] The presence of jellyfish in coastal areas poses a significant problem for the operation of certain types of coastal industries and activities. In industries that require a saltwater intake system for their proper functioning, such as cooling systems, the appearance of jellyfish near the water intake collectors can be dangerous due to blockages, leading to extremely serious consequences. Likewise, with the increase in global sea temperatures, the tourism industry, primarily focused on sun and beach tourism, is also being severely affected, as the presence of jellyfish on beaches influences tourists' choice of destinations, with the consequent negative impact on the local economy.

[0007] Currently, the market offers both deterrent systems designed to reduce the arrival of jellyfish in certain areas and early warning systems. Systems for preventing and reducing jellyfish arrival in designated areas currently rely on physical means such as nets anchored to the substrate and floating buoys, bubble barriers, or membranes. Early warning systems, on the other hand, are based on monitoring environmental conditions to estimate the likelihood of jellyfish appearing. Finally, there are certain compounds and products on the market designed to prevent, reduce, and / or alleviate the effects of jellyfish stings on humans. Most of these products are creams and ointments that, upon contact with water, leave residues, causing pollution and contamination.

[0008] The following details published patent documents and their differences with respect to the proposal of the present invention.

[0009] Patent documents CN111127281 A “Large-scale disaster jellyfish online monitoring system and monitoring method” and CN112801381A relating to “Jellyfish disaster early warning method” disclose systems capable of detecting and / or predicting the arrival of jellyfish; however, these systems do not allow modifying their behavior in order to repel them from reaching the desired location.

[0010] Korean document no. KR20140131242A relating to “A jellyfish barrier device” discloses a membrane-shaped barrier system that is able to block the passage of jellyfish to bathing areas, although it is not able to modify its behavior in order to repel jellyfish.

[0011] Korean patent no. KR101262704B1, "A Jellyfish Barrier Device," discloses a system capable of blocking jellyfish from reaching the target area for subsequent collection. The system disclosed in this patent is not capable of modifying the jellyfish's behavior to repel them.

[0012] French document no. FR2439845A1 concerning “Jellyfish barrier for sea bathing area - has submerged bed anchored screen hung from float and straddled by pipes emitting air bubbles” discloses a system consisting of an underwater barrier that uses bubble currents to repel jellyfish, preventing them from accessing the protected area. Despite repelling jellyfish, this document does not disclose the temporary modification of their natural behavior, for example, through the use of electromagnetic fields.

[0013] The European patent validated in Spain no. ES2444116T3 “Anti-jellyfish combinations” discloses the use of cations to prevent jellyfish stings, but does not modify their behavior.

[0014] The Spanish utility model no. ES1069100U “Protection barrier against jellyfish” uses a net anchored to the substrate and some floating buoys, which is made to measure for the place to be protected, the jellyfish get caught and cannot pass, but it is not able to modify the behavior of the jellyfish.

[0015] Spanish utility model no. ES1243505U “Anti-jellyfish protection barrier” uses an anti-jellyfish net anchored to the seabed and an elongated floating buoy that prevents jellyfish from passing through. However, this does not alter their behavior.

[0016] Spanish utility model no. ES1238887U “Jellyfish Protection Device” uses a net-like barrier with weights and buoys for its operation; in this case, there will be ropes for vessels to moor. This barrier prevents the passage of jellyfish and other marine organisms, but it is not capable of modifying their behavior.

[0017] On the other hand, international patent application no. WO2015068873A1, “Ocean life repelling device and array including same,” discloses a system for modifying animal behavior, specifically for repelling marine life. The system consists of a buoy, anchored to the seabed by weight, a magnetic field generator, and a solar module. However, unlike the present invention, the system proposed in WO2015068873A1 focuses on the buoyancy system and its adaptability to changes in water column height. Additionally, the system in that document is designed for sharks, not jellyfish, and the magnetic field is generated by electrodes rather than by a coil, as in the present invention.Document WO2015068873A1 does not clearly describe the system that generates the magnetic field, and since it powers electrodes, it is not capable of generating the current necessary to power a coil like the one proposed in the present invention, whose configuration, as will be seen later, is key to generating the frequency required to effectively affect the movement of jellyfish.

[0018] International patent application no. WO2017122838A1, “Buoy for repelling jellyfish by using ultra-low frequency waves,” discloses a jellyfish repellent system based on a buoy with a solar module that powers and charges a battery, a controller, and an ultra-low frequency wave generator. The system is anchored to the seabed by chain and weight. However, unlike the present invention, the system in WO2017122838A1 uses ultra-low frequency waves (10 to 20 Hz) instead of a magnetic field. Furthermore, the system proposed in WO2017122838A1 incorporates elements designed to eradicate jellyfish—the ultra-low frequencies—whereas the system proposed in the present patent is harmless and does not eradicate them; it simply repels them from the area where it is deployed.

[0019] International patent application no. WO2016072862A1, “Apparatus for rejection / control of pests to areas, and the use thereof,” describes a system and method for repelling marine life, among other things, based on a net that delimits a protected area using floats and weights. Electrical pulses are used along the net, powered by batteries or a solar panel. However, unlike the present invention, the solution proposed in WO2016072862A1 uses a train of electrical pulses to repel animals instead of generating a magnetic field. Generating an electromagnetic field, as in the present invention, requires less energy and fewer electronic components than generating a train of electrical pulses.

[0020] Finally, it is worth mentioning the article entitled “Altering the Behavior of the Catostylus mosaicus Jellyfish using Electromagnetic Fields” (2023, Jaime Lloret et al.), which studies the effect of applying an electromagnetic field generated by a coil on the behavior and movement of jellyfish in an aquarium. The results, from a trial conducted in a domestic-sized aquarium (30 liters capacity), show how the frequency of swimming movements decreases in response to the radiation. While the article mentions that the magnetic field affects jellyfish, it does not detail a specific system configuration for its effective use in open water, nor does it disclose any trials demonstrating the magnetic field intensity achieved in a marine environment or the jellyfish's behavior under a specific industrial-scale system configuration.Furthermore, the article discloses the generation of waves from 2 to 3.5 kHz, which are far removed from the proposal of the present invention. The generated magnetic field, according to the variations of the described parameters, varies between 12.1 and 14.3 mT.

[0021] Thus, in view of the state of the art described, the need is detected to offer a large-scale system capable of operating effectively in a real marine environment, which allows temporarily altering the behavior of jellyfish to avoid the problems associated with them, without causing physical damage to them.

[0022] EXPLANATION OF THE INVENTION

[0023] The present invention proposes an automatic electronic system capable of altering the movement pattern or behavior of jellyfish in marine environments based on the generation of magnetic fields. The system allows for the control of jellyfish presence in sensitive areas, delimited by the electrical system, by reducing the jellyfish's swimming ability and using seabed currents to move them to other areas. Thus, the system generates small electromagnetic (EM) fields in the water from enamelled copper coils, such that the jellyfish reduce their pulsation rate in response to these fields. In this regard, it should be noted that the technical characteristics of the coils used in the system, as well as their arrangement, are vital to achieving the intended effect of the present invention.

[0024] It should be noted that a jellyfish's pulsations correspond to the movement by which it contracts its bell to create a flow of water that allows it to move. In this way, jellyfish, during their normal behavior, regulate their pulsations to maintain themselves at the top of the water column.

[0025] When exposed to the electromagnetic fields of the coils of the present invention, the affected jellyfish reduce their pulsation rate. Thus, the system temporarily immobilizes the jellyfish, and gravity causes them to sink through the water column, moving them away from the system (and the electromagnetic field it generates) due to ocean currents. The duration of this pulsation varies between species and their proximity to the magnetic field; in the most sensitive individuals, this effect can last for several minutes.

[0026] The jellyfish movement modification system of the present invention includes a buoy, a chain attached at one end to the buoy, and a weight or ballast located at the opposite end of the chain from the buoy, so that the system is anchored or fixed to the seabed by the weight in order to create a vertical barrier.

[0027] Along the chain are attached two or more coils of copper wire, which are responsible for generating the EM fields that will affect the movement of nearby jellyfish.

[0028] The buoy houses all the electrical and electronic components necessary to capture, store, and regulate energy, as well as the microcontroller and the circuit that generates a signal of at least 3.3V and an operating frequency between 400 and 800 kHz. To power the system, the buoy includes an external energy harvesting element, preferably a solar panel. Internally, the buoy contains a battery-based energy storage component, a DC-DC converter, a microcontroller with an output of at least 3.3V responsible for activating / deactivating the coils, a sinusoidal signal generator for powering the coils, and a control relay responsible for activating / deactivating the sinusoidal signal generator.

[0029] In this way, using the energy provided by the DC power converter, the sinusoidal signal generator powers the coils to generate the desired EM field.

[0030] The microcontroller involved in the system of the invention must have at least a 3.3V output, and preferably a 5V output.

[0031] On the other hand, in order to generate the EM field with the intensity necessary for the correct functioning of the system of the invention, the design of the characteristics of each coil has been optimized, which must be within the following ranges:

[0032] Number of coil turns: between 80 and 120 turns arranged in the form of a solenoid or toroid.

[0033] Coil diameter between 25 and 35 mm.

[0034] Diameter of the copper wire of each coil between 0.4 mm and 0.6 mm.

[0035] Finally, with regard to the sinusoidal signal generator, it should be noted that the generated signal must meet the following characteristics:

[0036] Peak-to-peak voltage (VPP) of at least 3.3 V.

[0037] Operating frequency between 400 and 800 kHz.

[0038] Waveforms: preferably a sinusoidal wave, although square waves may be acceptable.

[0039] Offset of the 0 V signal (highly recommended), although it is also possible to work with an offset with a positive signal part and a negative signal part, oscillating with reference to a voltage midpoint

[0040] Thus, a sinusoidal signal generator is required to produce an alternating current similar to a sinusoidal signal containing a positive and a negative portion, oscillating around a voltage midpoint. To achieve this, an operational amplifier and a series of discrete components are used to adapt the necessary signal levels. Specifically, the sinusoidal signal generator has three blocks: a first block, a virtual ground system, which includes a power supply; a second block comprising a voltage divider made up of two resistors of the same value; and a third block comprising a capacitor.

[0041] It should be noted that the system of the invention has a modular character that facilitates interoperability with different manufacturers. Thus, it allows the addition of multiple microcontrollers from different manufacturers, which are characterized by having different prices, energy consumption, computational and storage capacities, etc., without having to make significant changes to the system.

[0042] It is important to note that the proposed system is harmless to jellyfish, because when they leave the EM field, they resume pulsating and moving with complete regularity, but far from the conflict zone where it is desired that they not be present.

[0043] The presence of a plurality of coils along the vertically arranged chain defines a water column in which the EM field generated by the present invention acts, creating a barrier, or the presence of the coils in the aforementioned chain is limited to only a part of the water column, in which case, work would be done to prevent the arrival of jellyfish to a very specific area, for example, the water collection collectors.

[0044] The system can be implemented on different types of substrates and at different depths, its effectiveness depending on the advection produced by the currents when the jellyfish reduces or stops its pulsation (and consequently its own movement).

[0045] The system of the invention prevents jellyfish from reaching protected areas and, as previously mentioned, is based on the generation of electromagnetic fields that affect the jellyfish, causing them to stop pulsating, and on the use of water currents that carry the motionless jellyfish away. Once away from the magnetic field, the jellyfish regain their mobility.

[0046] Therefore, the procedure for modifying the movement of jellyfish in marine environments using the system of the invention comprises the following steps:

[0047] System layout in the selected marine environment; energy capture by the energy capture element and storage of the same in the storage component;

[0048] conversion to direct current voltage by the direct current voltage converter and power supply to the microcontroller and / or control relay;

[0049] activation by the control relay of the sinusoidal signal generator, which generates a signal with a peak voltage of at least 3.3 V, each coil generating an electromagnetic field with a frequency between 400 kHz and 800 kHz; the electromagnetic field affects the jellyfish present, decreasing their pulsations compared to the maximum pulsations in the absence of an electromagnetic field, and the pulsations can be reduced until the jellyfish stop completely;

[0050] Falling due to gravity of jellyfish affected by electromagnetic fields; being carried by ocean currents to an area beyond the reach of electromagnetic fields;

[0051] recovery of pulsations in the absence of an electro field by jellyfish;

[0052] Thus, when jellyfish pass near the system's coils, arranged vertically along the water column, the electromagnetic fields will disrupt their normal swimming motion, causing them to become partially or completely still. Due to gravity, and influenced by the magnetic fields of the successive vertical coils, the jellyfish will sink to the bottom and be carried away by the currents from the protected area. Once the jellyfish moves away from the area affected by the electromagnetic fields, it will regain its natural pulsation and resume swimming freely.

[0053] This invention has industrial applications for protecting bathing areas where potentially dangerous species are present, as well as for preventing the obstruction of water intakes. The latter is particularly relevant to the energy industry, specifically in seawater-cooled thermal power plants (including nuclear power plants), where it has been necessary to shut down operations. Using this system near water intakes could prevent massive jellyfish blooms. Other potential applications include seawater intake for desalination plants or aquaculture facilities.

[0054] Finally, it should be emphasized that this system does not harm jellyfish nor does it create an obstacle where they can accumulate, causing secondary problems such as the destruction of individuals by impacts from surface currents and waves. Using this system, the jellyfish are detained and redistributed to other areas by the currents along the ocean floor.

[0055] BRIEF DESCRIPTION OF THE FIGURES

[0056] To complement the description being made and in order to facilitate the understanding of the characteristics of the invention, a set of illustrative images is included as an integral part of said description, where the following has been represented:

[0057] Figure 1.- Shows a view of the effect of the system of the present invention on the displacement of jellyfish in the marine environment.

[0058] Figure 2.- Shows a view of the system according to a preferred embodiment of the present invention.

[0059] Figure 3.- Shows a detailed view of the electronic blocks that form the sinusoidal signal generator that participates in the system of the invention.

[0060] Figure 4 shows a graph illustrating the effect of a magnetic field generated at different frequencies on the motility of various jellyfish species. The x-axis represents the exposure frequency in kHz, while the y-axis represents the percentage of pulsations measured relative to their maximum in the absence of an electromagnetic field. Data series A corresponds to the jellyfish species Rhizostoma pulmo, data series B corresponds to the species Carybdea marsupialis, and data series C corresponds to the jellyfish species Catostylus mosaicus.

[0061] DETAILED EXPOSURE OF MODES OF REALIZATION

[0062] Figure 1 shows a diagram of the system installation in a marine environment with the presence of jellyfish, where it can be seen that the system of the invention in its preferred embodiment includes a buoy (1) - which contains the electrical and electronic part -, a chain (9) for anchoring, a weight (2) located on the seabed and coils (4) joined along the chain (9) which are arranged in the area to be protected where it is desired to avoid the presence of jellyfish.

[0063] A single system or vapors can be placed, forming a linear or circular barrier to protect the area of ​​interest.

[0064] The system must be located in a marine environment where there are water currents at the bottom, which allow the jellyfish affected by the proposed system to be dragged along.

[0065] After placing the system in the selected location, it is powered by a solar panel (3) located on the outside of the buoy (1), as shown in Figure 2. This figure schematically details the elements that form part of the system of the invention according to a preferred embodiment, which are listed below:

[0066] - a buoy (1),

[0067] - a chain (9) at the end of which there is a weight (2) to fix the system in the marine environment,

[0068] - four coils (4) joined along the chain (9) that generate EM fields, where each coil (4) has a number of turns between 80 and 120 turns arranged in the form of a solenoid or toroid, a coil diameter between 25 and 35 mm and a copper wire diameter between 0.4 and 0.6 mm;

[0069] so that the buoy (1) has:

[0070] - on its external part, a solar panel (3) for energy capture, and - inside, a battery-based energy storage component (10), a DC voltage converter (11), a microcontroller (13) with an output of at least 3.3 V, a sinusoidal signal generator (14) for powering the coils (4) and a control relay (12) responsible for activating / deactivating the sinusoidal signal generator (14).

[0071] The signal from the sinusoidal signal generator (14) feeds the coils (4), generating EM fields that alter the natural behavior of the jellyfish (5), leaving them motionless (6) when exposed to them, so that the jellyfish (5) are carried away from the chain (9) by the action of the currents of the marine environment, recovering their natural behavior (pulsations in the absence of affect by the EM fields) when they are out of reach of the electromagnetic fields.

[0072] The voltage levels provided by the solar panel (3) must be adapted to the requirements of the microcontroller (13) and the rest of the elements present in the system, using 3.3 V or 5 V.

[0073] Thus, the microcontroller (13) is responsible for controlling whether the coils (4) should be activated or not. When the sinusoidal signal generator (14) is activated, the coils (4) receive the signal after passing through the output stage responsible for removing the offset from the square wave signal.

[0074] The signal generated by the sinusoidal signal generator (14) has the following characteristics: VPP of at least 3.3 V, frequency between 400 and 800 kHz.

[0075] The electronic system consists of a DC voltage converter (11) responsible for converting the solar energy captured by the solar panel (3) into electrical energy, which is then stored in a battery (10). Preferably, the buoy (1) includes a charge controller (15) responsible for controlling the charging of the battery (10) and powering the rest of the system.

[0076] The power supplied by the DC voltage converter (11) is typically 12 or 24 V. A DC voltage converter (11) is required to provide an output voltage of between 3.3 V and 5 V.

[0077] Figure 3 shows the electronic diagram necessary for creating the sinusoidal waves suitable for powering the different coils (4) that make up the system of the invention. Thus, as shown in Figure 3, the sinusoidal signal generator (14) consists of 3 blocks:

[0078] Block 1: Virtual Ground Creation System. This system comprises a simple power supply of at least 12V and a voltage divider formed by two resistors of the same value (R1=R2). This creates a virtual ground or midpoint at 6V. The generated signal will initially oscillate between +6V and at least +12V. A capacitor (C4) is also included to decouple the midpoint created by the voltage divider.

[0079] Block 2: Waveform Generator Using Operational Amplifier and Filtering: This is implemented using an operational amplifier in a Wien bridge configuration, comprising three resistors (RT), (R2'), and (Raiste); two capacitors (C1) and (C2); and two diodes (D1) and (D2). Components (C1) and (RT) are connected in series between the output (Vout) and the non-inverting input (+) to create the positive feedback branch, and components (C2) and (R2') are connected in parallel between the non-inverting input (+) and ground (GND). Components (RT), (R2'), (C1), and (C2), along with (R1) and (R2) from Block 1, allow selection of the oscillation frequency of the generated signals, a key parameter for generating the desired EM fields. Negative feedback is used as a gain control system and to stabilize the amplitude of the output signal.It is implemented using an adjustment resistor (Radjust) and two diodes (D1) and (D2) connected in parallel with (Radjust) but in opposite directions. This system will limit the signal amplitude when it tries to grow too large.

[0080] Block 3: Signal DC level coupling or adjustment system:

[0081] After generating a sinusoidal signal that oscillates between ±6V, a coupling capacitor (C3) is used to block the direct current (DC) component and center the signal at 0V, so that positive and negative parts alternate.

[0082] Thus, for the system to function correctly, an alternating or oscillating signal is required, and this oscillation must be between positive and negative values. To achieve this, Block 2 is powered by two voltage levels generated in Block 1. Therefore, the output of Block 2 is a signal capable of oscillating between the values ​​generated in Block 1, but it does not yet have the required negative values. This is why Electronic Block 3 is included, which shifts the signal and centers it at zero. With this, an alternating signal that oscillates between a positive and a negative value is finally obtained.

[0083] As schematically represented in Figure 1, when jellyfish pass near the coils (4) of the system, the EM fields will cause a disruption in their normal swimming motion (5), temporarily immobilizing them (6). Due to gravity, the jellyfish will sink to the bottom and be carried away by surface currents (7) and deep currents (8) from the protected area. Once the jellyfish moves away from the area affected by the EM fields, it will regain its natural pulsation and resume swimming freely.

[0084] Figure 4 shows a graph indicating jellyfish motility as the number of pulsations in a 30-second period compared to the maximum number of pulsations recorded during the experiment for the different magnetic fields generated. In the experiments, the jellyfish were exposed for 2 minutes to the magnetic field generated by the coils when powered at different frequencies, and then the jellyfish were left unexposed. The effects were observed both during the exposure and for one minute afterward. These data were collected for three jellyfish species belonging to different taxonomic groups.

[0085] Figure 4 shows that all jellyfish species used in the experiments exhibited alterations in their motility at some point during the experiment. In some species, such as Rhizostoma pulmo (data series A in Figure 4), the effects were more pronounced, with pulsations ceasing completely when exposed to a frequency of 800 kHz. In other cases, the effect is visible when the field is generated at various frequencies, and the jellyfish reduces the number of pulsations, but without reaching zero. This is the case with Carybdea marsupialis (data series B in Figure 4), which is affected by frequencies of 400 kHz and 700 kHz.Finally, there is one species, Catostylus mosaicus (data series C in figure 4), on which the generated magnetic field affects it by lowering its number of pulses to less than half and reaching less than 20% of its normal pulses when exposed to magnetic fields generated with a wide range of frequencies from 400 kHz.

Claims

1. System for modifying the movement of jellyfish in marine environments, characterized in that it comprises: - a buoy (1); - a chain (9) attached at one end to the buoy (1), while at the opposite end it has a weight (2) to fix the system in the marine environment; - two or more coils (4) arranged along the chain (9) that generate electromagnetic fields, where each coil (4) has a number of turns of copper wire of between 80 and 120 turns arranged in the form of a solenoid or toroid, and where each coil has a diameter of between 25 and 35 mm, while the copper wire has a diameter of between 0.4 and 0.6 mm; so that the buoy (1) has: - on its external part, an energy harvesting element, and - inside, a battery-based energy storage component (10), a DC voltage converter (11), a microcontroller (13) with an output of at least 3.3 V, a sinusoidal signal generator (14) for powering the coils (4), and a control relay (12) responsible for activating / deactivating the sinusoidal signal generator (14), such that - from the energy supplied by the DC voltage converter (11) - the sinusoidal signal generator (14) generates a signal with a peak-to-peak voltage (VPP) of at least 3.3 V; an operating frequency between 400 and 800 kHz and a signal offset of 0 V or an offset with a positive signal part and a negative signal part, oscillating with reference to a voltage midpoint; where the signal from the sinusoidal signal generator (14) feeds the coils (4), generating electromagnetic fields that alter the natural behavior of jellyfish (5), leaving them motionless (6) when exposed to them, so that the jellyfish (5) are carried away from the chain (9) by the action of the currents of the marine environment, recovering their natural behavior when they are out of reach of the electromagnetic fields.

2. System for modifying the movement of jellyfish in marine environments, according to claim 1, characterized in that the energy collection element corresponds to a solar panel (3).

3. System for modifying the movement of jellyfish in marine environments, according to claim 1, characterized in that the buoy (1) includes a charge regulator (15) that controls the charging of the batteries (10).

4. System for modifying the movement of jellyfish in marine environments, according to claim 1, characterized in that the direct voltage converter (11) transforms to an output voltage between 3.3 V and 5 V.

5. System for modifying the movement of jellyfish in marine environments, according to claim 1, characterized in that the microcontroller (13) has a 5 V output.

6. System for modifying the movement of jellyfish in marine environments, according to claim 1, characterized in that the sinusoidal signal generator (14) is formed by the following blocks: Block 1: Virtual Earth creation system comprising: a simple power supply of at least 12 V; a voltage divider formed by two resistors [(R1), (R2)] of the same value, creating a virtual ground or midpoint at 6V and generating a signal that initially oscillates between +6V and at least +12V; and a capacitor (C4) to decouple the midpoint created with the voltage divider. Block 2: Wave generator using an operational amplifier in a Wien bridge configuration that limits the signal amplitude, such that the operational amplifier comprises: - three resistors [(R1'), (R2'), (Rjustment)] - two capacitors [(C1), (C2)], - two diodes [(D1), (D2)] so that: Components (C1) and (RT) are connected in signal between the output and the non-inverting input (+), creating a positive feedback branch; components (C2) and (R2') are connected in parallel between the non-inverting input (+) and ground (GND); so that (RT), (R2'), (C1) and (C2) allow the selection of the oscillation frequency of the generated signals; The adjustment resistor (Raiste) and the two diodes [(D1), (D2)] are connected in parallel and in opposite directions, creating negative feedback for gain control and stabilization of the output signal amplitude; Block 3: Signal DC level adjustment system comprising a coupling capacitor (C3) that blocks the DC component and centers the signal at 0V, so that positive and negative parts alternate.

7. A method for modifying the movement of jellyfish in marine environments using the system of any of the preceding claims, characterized in that it comprises the following steps: system layout in the selected marine environment; energy capture by the energy capture element and storage of the same in the storage component; conversion to direct current voltage by the direct current voltage converter and power supply to the microcontroller and / or control relay; activation by the control relay of the sinusoidal signal generator, which generates a signal with a peak voltage of at least 3.3 V, each coil generating an electromagnetic field with a frequency between 400 kHz and 800 kHz; the electromagnetic field affects the jellyfish present, decreasing their pulsations compared to the pulsations in the absence of the electromagnetic field; falling due to gravity of the jellyfish affected by electromagnetic fields; being carried by ocean currents to an area beyond the reach of the electromagnetic fields; and recovery of pulsations in the absence of an electro field by jellyfish.

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