JP2601756B2 - Sonic type bottom antifouling device and low frequency sonic oscillator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound wave type bottom antifouling device and a sound wave oscillator for preventing shellfish and shellfish such as barnacles from adhering to the ship bottom using sound waves, and in particular, to a sound wave type low frequency sound wave. Ultra-sound marine antifouling system that uses very little power and can be used without recharging even when moored for a long time without using a land power source or large battery, and oscillates low-frequency sound waves with a simple structure The present invention relates to a low-frequency sound wave oscillator.

[0002]

2. Description of the Related Art In general, crustaceans and shellfish such as seaweeds and barnacles adhere to the bottom of ships in the ocean, causing a decrease in speed. The active ingredient in the paint gradually dissolved out, and the effect of preventing adhesion was not permanent. Therefore, it was necessary to frequently mount the ship, remove the attached organisms, and repaint the bottom paint. In addition, toxic substances in ship bottom paints are one of the causes of marine pollution.

[0003] Further, since the work of removing shellfish attached to the bottom of a ship is troublesome, methods and apparatuses for preventing marine organisms such as barnacles from attaching to the bottom of the ship have been considered.
Among these, those using ultrasonic waves, for example, "Method for Preventing the Adhesion of Living Organisms in Water (Japanese Patent Laid-Open No. 50-5879)
2) "," Methods for Preventing and Removing Adherence of Organisms Adhering to Ships or Offshore Structures (Japanese Patent Laid-Open No. 52-112294) ",
A method for preventing marine organisms from adhering to a seawater pipe system of a ship or the like (Japanese Patent Application Laid-Open No. 55-132377), an apparatus for automatically washing a stern propeller with ultrasonic waves in water (Japanese Patent Application Laid-Open No. 56-38169) and the like have been filed.

[0004]

However, in the method and apparatus for preventing shellfish such as barnacles from adhering to the bottom of a ship using the above-mentioned ultrasonic waves, a large amount of electric power is required to use the ultrasonic waves. Therefore, during mooring, a large-capacity battery was required when land power was not available.

[0005] The above-described apparatus using ultrasonic waves consumes a large amount of electric power, and the apparatus itself is a large device, so that the installation cost is relatively high, and it is difficult to install the apparatus in a small ship physically and economically. Met. Therefore, small craft still had to rely on toxic bottom paint. However, this bottom paint also tends to be gradually controlled in toxicity, and owners of small vessels are struggling with measures to prevent bottom adhesion.

The present invention has been made in view of the above problems, and has been made in order to solve the problems. It is an object of the present invention to dislike crustaceans and shellfish such as barnacles that emit low-frequency sound waves. Using low-frequency sound waves to prevent these marine organisms from adhering to the bottom of the ship, and further vibrating the entire bottom of the ship to further enhance the effect of preventing shellfish from adhering, and to reduce the low-frequency sound waves It provides a sonic antifouling device that minimizes power consumption by using it and enables long-term use without using a large-capacity battery. The object of the present invention is to provide a low-frequency sound wave oscillator that oscillates.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of oscillators for emitting low-frequency sound waves are arranged at predetermined positions on a ship bottom so that the entire ship bottom vibrates finely. Then, the DC power supply was converted to a low-frequency pulse current, passed to the oscillator of the terminal, and arranged at predetermined positions on the bottom of the ship.
Multiple oscillators are sequentially timed from the bow to the stern.
Shifting the entire ship's bottom by oscillation is which has the constitution in which a control panel for controlling the respective oscillator to oscillate.

According to a second aspect of the present invention, there is provided a box-shaped internal resonance box having a hollow interior including a substrate, a vibration plate and a side plate, and a hollow internal resonance box including a mounting plate and a side plate. Attach to the center surface of the substrate inside the resonance box, install an electromagnet on the surface of the mounting plate of the internal auxiliary resonance box, attach the magnetic plate to the surface of the diaphragm inside the resonance box with a small gap from the flat surface of the electromagnet An external sub-resonance box having a hollow box-type inside with an adhesion plate and a side plate is mounted on the outer surface of the resonance box on the back surface side of the vibration plate where the magnetic plate is mounted.

[0009]

The present invention having the above-described structure operates as follows. That is, according to the configuration of the first aspect of the present invention, an oscillator that oscillates low-frequency sound waves disliked by crustaceans and shellfish such as barnacles is disposed on the bottom of the ship, and emits low-frequency sound waves. To prevent marine organisms from adhering, and place them at specified locations on the ship's bottom.
Time from the bow to the stern
The vibration is shifted to oscillate to slightly vibrate the entire bottom of the ship, thereby further improving the adhesion preventing effect. In addition, the use of low-frequency sound waves reduces the amount of power consumption, and enables use without charge even during long-term mooring without using a large-capacity battery.

According to the second aspect of the present invention, the diaphragm on which the magnetic plate is attached vibrates delicately in response to the function of the electromagnet, and the vibration causes the resonance box to emit a low frequency and the internal auxiliary resonance. The box and the external auxiliary resonance box resonate with the resonance box to amplify the low frequency, oscillate the amplified low frequency sound wave, and oscillate the low frequency sound wave with a simple structure.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments shown in the drawings. Here, FIG. 1 is a schematic diagram of the sonic type antifouling device, FIG. 2 is an arrangement diagram of the oscillator, FIG. 3 is a sectional side view of the low-frequency sonic oscillator, and FIG. 5 is a perspective view of the low frequency sound wave oscillator.

In FIG. 1, a sonic type antifouling apparatus 1 is a device for preventing shellfish and shellfish such as barnacles from adhering to a ship bottom a using sound waves, and includes a plurality of oscillators 2 ( S1 to S6) and each oscillator 2 (S1 in the drawing)
To S6) are mainly configured from a control panel 3 for controlling the six control panels. The sonic type antifouling apparatus 1 has a feature that uses low frequency as a sound wave, makes power consumption extremely small, and can be used without charging even during long-term mooring without using a large-capacity battery.

The oscillator 2 (six S1 to S6 in the drawing) is a device for oscillating a low frequency (18 Hz to 40 Hz) sound wave. According to underwater experiments and literature, low-frequency sound waves that are optimal for preventing shellfish such as barnacles from adhering to the ship's bottom a exhibit an excellent adhesion-preventing effect when the low frequency is about 28 Hz.

Each oscillator 2 (S1 to S6 in the drawing)
For example, as shown in FIG. 2, is disposed at a predetermined position on the inside of the ship bottom so that the entire bottom of the ship vibrates slightly.
The number and arrangement intervals of the oscillators 2 are selected according to the strength of the sound waves of the oscillator 2, the material and thickness of the ship bottom, and the width of the ship bottom.

The control panel 3 converts a DC power supply into a low-frequency pulse current to convert each of the oscillators 2 (S1 to S6 in the drawing).
To each oscillator 2 (S1 to S6 6 in the drawing).
Of the oscillators 2 (S1 to S6 in the drawing) so that the entire bottom of the ship vibrates finely by sequentially shifting the oscillation times of the
This is a device for controlling the oscillation time and oscillation interval. The control panel 3 is connected to a 12 volt or 24 volt DC power supply 3a. The control panel 3 is provided with a simple keyboard 3b, a display screen 3c, and a volume control knob 3d. Reference numeral 3e denotes an indicator light for checking the operation status of the oscillator. The control panel is provided with eight oscillator connection terminals, and a total of four oscillators can be attached to each connection terminal. Therefore, a total of 32 oscillators can be controlled by one control panel. Since the pulse current flows sequentially from the terminal 1 to the terminal 8, the current consumption per operation is sufficient for four oscillators at the maximum.

According to an experiment, when 10 oscillators are mounted on a small boat having a length of 8 m, a 12-volt battery having a capacity of 100 AH can be used for about three months without charging with a power supply. Since a power supply of about 12 volts is sufficient, a battery mounted on a small leisure boat can be used as the power supply. Each oscillator 2 (S1 to S6 in the drawing)
The oscillation time, the oscillation interval, the operation time and the stop time can be freely set by pressing the keyboard 3b while viewing the display screen 3c provided on the control panel 3.

Incidentally, the oscillator 2 (S1 in the drawing)
6) have a simple structure in which the diaphragm 5 is vibrated by the electromagnet 4 to oscillate a low-frequency sound wave. Each oscillator 2 includes a resonance box 6,
Internal auxiliary resonance box 7 and diaphragm 5 provided inside resonance box 6
, A magnetic plate 8 attached to the inside, an external sub-resonance box 9 provided outside the diaphragm 5, and the like.

The resonance box 6 has a hollow box shape and includes a substrate 6a serving as a bottom surface inside the box and side plates 6b surrounding four sides thereof. The substrate 6a and the side plate 6b are made of, for example, a plastic plate. Is formed. The resonance box 6 is open on one side, and the diaphragm 5 is attached as a lid to the open side. By attaching the diaphragm 5 to the resonance box 6, the inside of the resonance box 6 is sealed.

The internal auxiliary resonance box 7 is attached to the center of a substrate 6a serving as a bottom surface inside the box of the resonance box 6. The internal auxiliary resonance box 7 has a hollow box shape inside and is smaller in size than the resonance box 6, and includes a mounting plate 7a on which the electromagnet 4 is mounted and side plates 7b surrounding four lower sides thereof. ing. The mounting plate 7a and the side plate 7b of the internal sub resonance box 7 are formed of, for example, a plastic plate.

The electromagnet 4 is mounted on a mounting plate 7a of the internal sub-resonance box 7, and the diaphragm 5 is mounted under the electromagnet 4 at a small interval. A magnetic plate 8 made of, for example, an iron plate is attached inside the diaphragm 5 on the side facing the electromagnet 4. The magnetic plate 8 is connected to the electromagnets 4 and 0.
It is attached to the diaphragm 5 with bolts and nuts so as to be spaced apart from each other by a very small distance of about 5 mm to 1.0 mm.

An external auxiliary resonance box 9 is attached to the outside of the vibration plate 5 on the back side of the attachment side of the magnetic plate 8. The external auxiliary resonance box 9 has a hollow box shape inside and is smaller in size than the resonance box 6, and has an attachment plate 9a adhered to the ship bottom a with an adhesive or the like and side plates surrounding four lower sides thereof. 9b. The attachment plate 9a and the side plate 9b of the external auxiliary resonance box 9 are formed of, for example, a plastic plate material.

Next, the use based on the configuration of the above embodiment will be described below. Oscillator 2 that oscillates low-frequency sound waves disliked by shellfish and shellfish such as barnacles on the bottom a of the ship
Are arranged at predetermined intervals, and the attachment plate 9a of the external auxiliary resonance box 9 of the oscillator 2 is attached to the ship bottom a by bonding with an adhesive or the like.

Subsequently, the tip of the wiring of each oscillator 2 is connected to the control panel 3, and 12 volts or 24
Volt DC power supply 3a is connected and the display screen 3 of the control panel 3
The operator presses the keyboard 3b while watching c, and inputs the oscillation interval and oscillation time of each oscillator 2. Thus, the mounting operation and the setting operation are completed.

Thereafter, while the control panel 3 controls the oscillation interval and oscillation time of each oscillator 2, low-frequency sound waves disliked by crustaceans and shellfish such as barnacles are oscillated from each oscillator 2, and the barnacles are placed on the bottom a of the ship. It prevents marine organisms such as from sticking. In addition, since low-frequency sound waves are used, power consumption can be minimized, and even when moored for a long time, it can be used for about three months without charging with a marine battery power supply.

Also, by causing the oscillator 2 to oscillate with the time sequentially shifted from the bow side to the stern side, underwater sound waves are oscillated with a certain time difference from the bow side to the stern side, as if at a flow rate of 3 to 4 knots. Phenomenon occurs as if it occurred. This pseudo flow velocity also enhances the effect of preventing the attachment of marine organisms.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0027]

As is apparent from the above description, according to the sonic type antifouling apparatus according to the first aspect of the present invention, the low frequency sound wave is used by crustaceans and shellfish such as barnacles. In addition, it is possible to prevent shellfish and shellfish such as barnacles from adhering to the bottom of the ship. And from the bow to the stern
By oscillating the oscillator with a staggered time
The sound waves in the water cause a certain time difference from the bow to the stern.
It oscillates and produces a flow rate of 3 to 4 knots
Phenomenon occurs as if it were squeezed. With this pseudo flow velocity
The effect of preventing adhesion of marine organisms can be further enhanced.

In the case of a recent self-polishing type bottom paint, in the case of long-term mooring, the effective components on the surface are leached, and the effect is immediately lost. A phenomenon occurs in which the lower active ingredient is leached into water, and a new anti-adhesion effect is produced. Therefore, the effective period of the paint is prolonged, and in other words, the number of times of painting can be reduced. Accordingly, it is possible to save the overhead costs and the painting costs of the ship. In addition, marine pollution decreases as the amount of bottom paint used decreases.

Combined with these effects, the use of low-frequency sound waves makes it possible to reduce the power consumption to an extremely small level of several tens of milliamps for the entire apparatus. To be able to It should be noted that a large-capacity power supply can be used, of course, and if a land-based power supply is available, it can be used by using a converter. The effect can be further enhanced.

According to the low frequency sound wave oscillator according to the second aspect of the present invention, a low frequency sound wave can be oscillated with a simple structure, and the handling thereof is also easy and easy. Because it is simple, there are few failures.
It has a very novel and beneficial effect.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a sonic type ship bottom antifouling device according to the present invention.

FIG. 2 is an arrangement view of an oscillator of the sonic type antifouling device according to the present invention.

FIG. 3 is a side sectional view of the low frequency sound wave oscillator according to the present invention.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is a perspective view of a low-frequency sound wave oscillator according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sonic type antifouling device 2 Oscillator 3 Control panel 3a DC power supply 3b Keyboard 3c Display screen 3d Volume control knob 3e Indicator lamp 4 Electromagnet 5 Vibration plate 6 Resonance box 6a Substrate 6b Side plate 7 Internal auxiliary resonance box 7a Mounting plate 7b Side plate 8 Magnetic plate 9 External auxiliary resonance box 9a Attachment plate 9b Side plate a Ship bottom S1 to S6 Each oscillator arranged at a predetermined position on the ship bottom

Claims (2)

(57) [Claims] 1. A plurality of oscillators for emitting low-frequency sound waves are respectively arranged at predetermined locations on the bottom of a ship so that the entire bottom of the ship vibrates finely, a DC power supply is converted to a low-frequency pulse current, and is supplied to an oscillator of a terminal. A plurality of fire sources, each of which is located at a predetermined location on the ship's bottom
Move the shaker sequentially from the bow to the stern
Sonic antifouling apparatus characterized by whole ship bottom so oscillated is provided a control panel for controlling the respective oscillator to oscillate. 2. A resonance box having a hollow box-shaped interior including a substrate, a vibration plate, and a side plate is provided, and an internal sub-resonance box having a hollow interior including a mounting plate and a side plate is provided at the center of the substrate inside the resonance box. An electromagnet is provided on the surface of the mounting plate of the internal sub-resonance box, and the magnetic plate is mounted on the surface of the vibration plate inside the resonance box with a small gap from the flat surface of the electromagnet, where the magnetic plate is mounted A low-frequency sound wave oscillator characterized in that a box-shaped external sub-resonance box having a hollow inside and consisting of an adhering plate and a side plate is attached to an outer surface of a resonance box on the back side of the vibration plate.