JP4931206B2 - How to prevent the attachment of marine life - Google Patents

Description

  The present invention belongs to the technical field of a method for preventing adhesion of marine organisms to marine structures.

As a method for preventing the attachment of marine organisms such as barnacles to marine structures such as artificial reefs and observation devices, various methods using antifouling paints, generation of ozone, chlorine, and oxygen peroxide have been proposed (for example, (See Non-Patent Document 1.)
Edited by the Japanese Society of Adhesive Biology, February 2006: Latest Science of Barnacles, Hoshiseisha Hoshisei

  However, none of the above-mentioned adhesion prevention methods has problems such as the lifetime of the effect and the economical efficiency, and has not yet achieved a sufficient effect.

  By the way, barnacle larvae are conventionally known to exhibit positive or negative phototaxis, but the phototaxis to light is only white light, and other luminescent colors have not been investigated.

  Therefore, the applicant examined the relationship between light and marine organisms through experiments.

<Experimental conditions>
The light source used in the experiment, the experiment location, the experiment period, and the depth suspended in the sea are as follows. A non-light-emitting underwater light was also tested in the same manner.
Light source: Underwater light with built-in red, blue, yellow, green, and white light emitting diodes (Hokukai Sangyo Co., Ltd., high-brightness LED “H0-G1”)
Experiment place: Nagasaki Prefecture Nagasaki Port Experiment period: August 10, 2006 to October 10, 2006 Suspension depth: LWL-1

<Experimental result>
The marine organisms adhering to the surface of each of the emitted underwater lights and the non-light-emitting underwater lights, the number thereof, and the attached weight are as follows.

[Attached marine life and its number]
Red light: 2 American barnacles Blue light: 17 white barnacles, 3 American barnacles, 3 red barnacles Yellow light: None Green light: 16 white barnacles, 2 American barnacles, 2 red barnacles 2 white light: 15 white barnacles , 2 American barnacles, 2 red barnacles No light emission: 13 white barnacles, 2 American barnacles, 2 red barnacles

[Adhesion weight]
Red light: 0.29 g
Blue light: 8.52g
Yellow light: 0g
Green light: 6.28g
White light: 5.48g
No light emission: 6.33g

  From the above experimental results, it was found that yellow or red light can prevent adhesion of marine organisms.

  Therefore, in view of the above experimental results, an object of the present invention is to provide a marine organism adhesion preventing method that can prevent marine organisms from adhering to marine structures.

As means for solving the problems of the background art, the marine organism adhesion prevention method according to the invention described in claim 1 is:
A method for preventing marine organisms from attaching to marine structures,
By projecting yellow or red light to the marine structure, marine organisms are prevented from adhering to the marine structure, and the light is projected by a light emitting diode .

The invention described in claim 2 is the marine organism adhesion prevention method according to claim 1 ,
Marine structure is an artificial reef,
This artificial reef has a solar cell panel and a storage battery, and the upper part of the artificial reef is formed of a transparent panel so that the solar cell panel can be illuminated with sunlight,
Furthermore, the artificial reef has a yellow or red light emitting diode, and the light emitting diode is configured to be supplied with power from the storage battery,
By projecting light of a light emitting diode onto the transparent panel, marine organisms are prevented from adhering to the transparent panel.

The invention according to claim 3 is the marine organism adhesion prevention method according to claim 1 ,
Offshore structures are observation devices,
This observation device has a configuration having a main body and a sensing unit,
A yellow or red light emitting diode is disposed in the vicinity of the sensing unit submerged in the sea, and the light of the light emitting diode is projected onto the sensing unit to prevent marine organisms from attaching to the sensing unit. Features.

  In the method for preventing adhesion of marine organisms according to the present invention, yellow or red light is projected onto the marine structure, so that marine organisms can be prevented from adhering to the marine structure and can always be maintained in a healthy state.

<Embodiment 1>
First, Embodiment 1 of the method for preventing adhesion of marine organisms according to the present invention will be described with reference to FIG.

  The adhesion prevention method of this embodiment is implemented in the artificial reef 1 which is an offshore structure, as shown in FIG.

  This artificial reef 1 has a floating device (not shown) and an outflow (drifting) warning in an outer shell 3 made of FRP or the like connected to an anchor (not shown) installed on the seabed via a drift prevention wire 2. The apparatus 4 etc. are stored, The power supply part of the said outflow alarm apparatus 4 has a solar cell panel (illustration omitted) and a storage battery (illustration abbreviation). The upper part of the outer shell 3 is covered and waterproofed with a pressure-resistant transparent panel 5 so that the solar cell panel can be illuminated with sunlight. That is, the illustrated artificial reef 1 has a configuration substantially similar to that of a typical floating and floating reef, but has a yellow or red light emitting diode 6, and the light emitting diode 6 is supplied with power from the storage battery. It is configured.

By using the artificial reef 1 having the above-described configuration, the light of the light-emitting diode 6 is projected onto the transparent panel 5 of the artificial reef 1 to prevent the attachment of marine organisms to the transparent panel 5 (the claims 1 and 5) Invention of Claim 2 ). Since artificial reefs are located on the sea surface or below the sea surface, conventional artificial reefs have marine organisms adhering to the transparent panel 5 and their transparency is impaired. However, since the adhesion prevention method of the present embodiment projects yellow or red light on the transparent panel 5, marine organisms adhere to the transparent panel 5 as described in the section of the problem to be solved by the invention. Can be prevented, and can always be maintained in a healthy state. Therefore, the solar cell can be charged well, and the cleaning operation of the transparent panel 5 that has been necessary once a month can be omitted.

  Further, since the power-saving light emitting diode 6 is employed as the light source, the storage battery can supply sufficient power to the light emitting diode 6 while functioning the outflow alarm device 4. Therefore, it is not necessary to add another power supply device. Moreover, since the light emitting diode 6 is small, it can be easily placed in a vacant space in the outer shell 3.

Incidentally, the light is not preferable to be projected in 50Lux more strength to marine structures. The attachment of marine organisms can be prevented more reliably.

<Embodiment 2>
Next, Embodiment 2 of the method for preventing adhesion of marine organisms according to the present invention will be described with reference to FIG.

  As shown in FIG. 2, the adhesion preventing method of the present embodiment is performed in the vicinity of the sensing unit 7 of an observation apparatus (not shown) that is an offshore structure.

  This observation device is similar to a usual observation device, a main body installed on the sea, and a sensing unit that continuously observes data such as seawater temperature, salinity, flow velocity, chlorophyll, etc., and transmits the data to the main body. 7, and the sensing unit 7 is submerged in the sea while being connected to the main body by the energization cord 8.

A yellow or red light-emitting diode 6 (for example, built in an underwater light connected to the main body by an energizing cord 8) is disposed in the vicinity of the sensing unit 7 of the observation apparatus having the above configuration. By projecting the light of the light emitting diode 6, marine organisms are prevented from adhering to the sensing unit 7 (inventions according to claims 1 and 3 ). The conventional observation apparatus has a drawback that marine organisms adhere to the sensing unit, and the fluidity of seawater to the sensing unit deteriorates, so that normal observation cannot be performed. Since yellow or red light is projected onto 7, the marine organisms can be prevented from adhering to the sensing unit 7 as described in the section of the problem to be solved by the invention, and can always be observed in a healthy state. Therefore, the accuracy of the observed data is high, and the cleaning work that has been conventionally performed by periodically lifting the sensing unit can be omitted.

  Further, since the power saving light emitting diode 6 is used as the light source, a small amount of power can be supplied. For this reason, when the light emitting diode 6 is configured to receive power supply from the power supply device (battery or the like) built in the main body via the energization cord 8, for example, the frequency of replacing the power supply device can be reduced. .

In this embodiment, the light is not preferable to be projected in 50Lux more strength to marine structures. This is because adhesion of marine organisms can be prevented more reliably as in the first embodiment.

  Although the adhesion prevention method of the said Embodiment 1, 2 was implemented with respect to the artificial reef and the observation apparatus, it is not this limitation. In short, the present invention can be carried out for an offshore structure that is desired to prevent the attachment of marine organisms, for example, a ship bottom or the inside of a water intake pipe that takes in seawater.

  The adhesion preventing method of the present invention can be applied to marine structures such as artificial reefs and observation devices in order to prevent the adhesion of marine organisms such as barnacles.

It is the schematic which showed 1st Embodiment of the adhesion prevention method of the marine organisms which concerns on this invention. It is the schematic which showed 2nd Embodiment of the adhesion prevention method of the marine organisms which concerns on this invention.

1: Artificial reef, 2: Drift prevention wire, 3: Outer shell, 4: Outflow alarm device, 5: Transparent panel, 6: Yellow or red light emitting diode, 7: Sensing part of observation device, 8: Energizing cord

Claims (3)

A method for preventing marine organisms from attaching to marine structures,
A method for preventing adhesion of marine organisms, wherein yellow or red light is projected onto the marine structure to prevent marine organisms from adhering to the marine structure, and the light is projected by a light emitting diode. . The offshore structure is an artificial reef,
This artificial reef has a solar cell panel and a storage battery, and the upper part of the artificial reef is formed of a transparent panel so that the solar cell panel can be illuminated with sunlight,
Furthermore, the artificial reef has a yellow or red light emitting diode, and the light emitting diode is configured to be supplied with power from the storage battery,
The method for preventing the adhesion of marine organisms according to claim 1, wherein the adhesion of marine organisms to the transparent panel is prevented by projecting light of a light emitting diode onto the transparent panel. Offshore structures are observation devices,
This observation device has a configuration having a main body and a sensing unit,
A yellow or red light emitting diode is disposed in the vicinity of the sensing unit submerged in the sea, and the light of the light emitting diode is projected onto the sensing unit to prevent marine organisms from attaching to the sensing unit. The method for preventing adhesion of marine organisms according to claim 1, characterized in that it is characterized in that:

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