JPS62176098A - Electric screen generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an electric screen generating device for generating an electric screen for blocking the swimming of fish and shellfish in seawater when cultivating fish and shellfish! related.

[Conventional technology]

Generally, when cultivating fish and shellfish, a cage is set up in seawater, and the fish and shellfish are cultured in the cage. Is it preventing fish and shellfish from escaping to the outside or entering the inside of the cage? At the early stage of aquaculture, the cultured fish are still juveniles with a body length of 1000 yen, and this is to block the swimming of these juveniles. In this case, it is necessary to use a very fine mesh net to be placed in the seawater.

However, in areas where the tidal changes are several meters long, the nets are easily damaged, and even if the damage is slight, young fish can easily escape, so it takes a lot of effort and money to maintain and maintain the nets. This will cause inconvenience.

[Problem that the invention seeks to solve]

Therefore, the sea area where the fish tank is usually installed should be selected to be a place that is not too deep, has calm waves, and has little tidal change, or even if it is a sea area that meets these conditions, there is a risk of nets being washed away or ships being destroyed by typhoons, etc. The net may be damaged due to contact, and maintenance and upkeep of the net requires a great deal of effort and expense, and there is a problem in that the net cannot reliably block the swimming of fish and shellfish.

In addition, when carrying out large-scale aquaculture such as at marine farms, the total length of the nets used is extremely long, and the labor and expense required to maintain and maintain the nets are correspondingly large. Using nets for isolation cannot be said to be the best strategy for large-scale aquaculture. Therefore, this invention can reliably prevent fisheries from being affected by ocean conditions such as tides, tides, and weather conditions such as typhoons. The technical challenge is to be able to block the swimming of fish and shellfish.

[Means for solving the problems] This invention has been made with the above points in mind,
Three rows of electrodes each formed of a plurality of conductive electrodes arranged at approximately equal intervals in seawater and arranged in parallel to each other, and the conductive electrodes of each of the electrode rows are electrically connected to each other. a connecting body, and a power source for generating an electric screen that applies electrons between each of the electrode rows so that the electrode row on one side has a low potential and the remaining two rows of the electrode rows have a high potential in sequence. This is an electric screen generator characterized by having a height of 1 ft.

[Effect]

In this invention, between three rows of electrodes arranged parallel to each other in seawater, one row of electrodes has a low potential and the remaining two rows of electrodes have a sequentially high potential. To,'! ! A voltage is applied by a power source for generating an air screen, and a double electric screen with a different potential slope is formed between each electrode column in the seawater, and fish and shellfish that enter the electric screen are electrically stimulated. They exhibit reactions such as mild numbness, paralysis, or asphyxia, and are unable to swim through the electric screen.This method allows fish and shellfish to be reliably blocked from swimming without using a net as in the past, and can be used to monitor tide levels, tides, water depth, etc. It is not affected by ocean conditions or weather conditions such as typhoons, making it extremely suitable for large-scale aquaculture such as on marine farms.

〔Example〕

Next, the present invention will be explained in detail with reference to drawings showing embodiments thereof.

First, the principle of this invention will be explained.

Now, for example, as shown in Figure 3, three electrodes (A), (B), and (C!l) are placed in parallel in seawater, and the left electrode fAl is at a low potential, that is, the ground potential. so that the remaining electrodes (Bl, (C) become higher potential in sequence,
A voltage is applied between each electrode (Al-(C1) to form a double electric screen.

At this time, the distance from electrode (Al to (Bl) is Ll, the distance from electrode (B) to (C) is L, and electrode + B).
, tc> as Vl, V, (V, >
V,), the potential distribution between each electrode (Al to fC1) is as shown in FIG. 4, and the electrode (A).

The potential slope E between fB1 is "I 'Q vl /"I
r electrode (B1. Potential gradient E between U, Hani, : (
V! -V, l/L.

And each 'dream!' If the potential gradient El of the electric screen between i (A1 and (C)) is small, fish and shellfish only show a surprising reaction, and as the potential gradient, T!, increases, they experience mild numbness. It begins to show reactions such as paralysis, asphyxia, and even death, and different potential gradients E, E2
By combining these, a double electric screen with different degrees of 'e5 air stimulation given to fish and shellfish is formed.

Therefore, as shown in FIG.
2a), and similarly arrange a plurality of rod-shaped conductive electrodes (lb) 2 and (1c) at equal intervals in seawater. When forming the third electrode row (2b), (2C1),
! On the knee, each electrode row (2a), (2b), (2c
) are parallel to each other, and each electrode row (2al, (
2b), each electrode row (between 2 Cl) so that the spacing is different
2a), (2b), (2C1 is arranged, and each electrode row (
2a), (2b), (2Cl tsure ('shi17) each J
The electric and electric 4f (la), (lbl, (lc)) are electrically connected to each other by the connecting body (3a1. (ab), (3c)), and the first connected to the connecting body (3a) and grounded.
The second terminal (4a) connected to the terminal (3b)
4b) and between the first terminal (4a) and the connecting body (3C
) and the third terminal (4c) connected to the second. A DC heavy pressure of λ was applied from an electric screen generating power source (not shown) so that the a'4#1 rows (2b) and (2c) became sequentially high in potential, and each electrode row A double electric screen with different potential gradients is formed between (2a) and (2c).

At this time, if each electrode row (2a) to (2C) is placed in seawater so as to surround a specific area using the electric screen, fish and shellfish from within the area surrounded by the electric screen can be removed. Escape 2 and the intrusion of fish and shellfish into the area surrounded by the electric screen are reliably prevented, fish and shellfish cannot swim through the electric screen, and no fish or shellfish can enter the area surrounded by the electric screen. Shellfish will be trapped.

For example, the distance from the first electrode row (2a) to the second electrode row (2b) is set to 60 cm, and the distance from the first electrode row (2b) to the second electrode row (2b) is 60 cm.
) to the third electrode row (2C) is 40 crn, the potential of the second electrode row (2b) is 2V, and the third electrode row (2C
) when the potential of each electrode row (2a) to (2C
) is shown in Figure 2, and the potential distribution between 1. Second
The potential gradient at the intermediate position between the electrode array (2al, (2b1) is approximately 0.03 V/cm, the second and third electrode array (2
The potential gradient at the intermediate position between b) and (2C) is approximately 0.
12V/crn, the fish that entered between the second electrode row (2a) and (2b), which has a small potential gradient, were startled and immediately escaped, and moved to the second electrode row, which had a large potential gradient. Third electrode row (
2b), (Fish and shellfish that invade between 2a1 show reactions such as paralysis and asphyxia.) 3. The horizontal axis in Figure 2 is the first electrode row (
2a).

By the way, when surrounding a specific joint with each electrode row (2a) to (2C), each electrode row (2a) to (2C) is arranged so that the first electrode row (2a) is on the inside, and the electric The area 8 with a small potential gradient and the area 8 with a large potential gradient of the screen are placed on the inside and outside, respectively, and the cultured fish and shellfish in the enclosure are exposed to weak electricity when they enter the electric screen. In order to prevent the farmed fish and shellfish from being damaged by electrical stimulation, when the foreign fish and shellfish invade the electric screen, strong electrical stimulation is applied to the inside I. By reliably blocking intrusion, it becomes possible to reliably protect farmed fish and shellfish.

However, each of the conductive electrodes (1a) to (IC) is not limited to the rod-like shape shown in J.

In addition, each electrode row (
Of course, an AC voltage or a pulse voltage may be applied between 2a) and 2a1.

Furthermore, the potential of the third electrode row (2C) becomes low, and the second electrode row (2C) becomes lower.
A voltage may be applied to each electrode row (2a) N (2C) so that the four rows (2b) and (2a) have a high potential in sequence.

〔Effect of the invention〕

As described above, according to the electric screen generator of the present invention, the @l-third electrode array (2a) to (2) is parallel to the seawater.
C), and each electrode row (2a) to By applying a voltage between (2C) and generating 2@ electric screens with different potential gradients, it is possible to electrically stimulate fish and shellfish that have invaded the electric screen and stop them from swimming +>fl. , unlike when using conventional nets, it is possible to reliably block the swimming of fish and shellfish without being affected by ocean conditions such as tide level, tide, water depth, etc., or weather conditions such as typhoons, making it easier to maintain nets. In addition, by combining different potential gradients, it is possible to protect farmed fish and shellfish by preventing them from being damaged by electrical stimulation and foreign fish. It is very effective for large-scale aquaculture such as ocean farms, and its effects are extremely large.

[Brief explanation of drawings]

The drawings show one embodiment of the electric screen generator of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a potential distribution diagram between each electrode row, Fig. 3 is a diagram explaining the principle, and Fig. 4 is a diagram showing the potential distribution between each electrode row. 4 is a potential distribution diagram between each electrode in FIG. 3. FIG. (lal, (lb), (Ic)...conductive electrode,
(2a), (2b1. (2C)...electrode row, (3
a1. (3b), (3c) ---Connection body. Agent Patent Attorney Fuji 1) Ryutabe 4t□--m----' Distance (c-) - The best distance

Claims (1)

[Claims] (1) Three rows of electrodes formed in seawater with a plurality of conductive electrodes arranged at approximately equal intervals and arranged parallel to each other, and the conductive electrodes of each of the electrode rows are electrically connected to each other. and a voltage is applied between each of the electrode rows so that the electrode row on one side has a low potential and the remaining two electrode rows have a high potential in sequence. An electric screen generator characterized in that it is equipped with a power source.