JPH0442793B2 - - Google Patents
Info
- Publication number
- JPH0442793B2 JPH0442793B2 JP61015354A JP1535486A JPH0442793B2 JP H0442793 B2 JPH0442793 B2 JP H0442793B2 JP 61015354 A JP61015354 A JP 61015354A JP 1535486 A JP1535486 A JP 1535486A JP H0442793 B2 JPH0442793 B2 JP H0442793B2
- Authority
- JP
- Japan
- Prior art keywords
- fish
- electrode
- electric field
- electric
- field strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005684 electric field Effects 0.000 claims description 34
- 239000013535 sea water Substances 0.000 claims description 10
- 241000251468 Actinopterygii Species 0.000 description 46
- 235000015170 shellfish Nutrition 0.000 description 24
- 230000000638 stimulation Effects 0.000 description 15
- 230000009182 swimming Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000009360 aquaculture Methods 0.000 description 4
- 244000144974 aquaculture Species 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 231100000862 numbness Toxicity 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Farming Of Fish And Shellfish (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、魚介類を養殖する場合に、海水中
における魚介類の遊泳遮断用の電気スクリーンを
発生する電気スクリーン発生装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric screen generating device for generating an electric screen for blocking swimming of fish and shellfish in seawater when cultivating fish and shellfish.
一般に、魚介類を養殖する場合、海水中にいけ
すを設け、該いけす内において魚介類の養殖を行
なつており、通常海水中に網を張りめぐらしてい
けすを形成し、網によりいけすの外側への魚介類
の脱出やいけすの内側への魚介類の侵入を阻止し
ているが、養殖初期の段階では、養殖魚はまだ体
長数cmの稚魚であり、これらの稚魚の遊泳を遮断
するためには、海水中に配設すべき網として非常
に目の細かいものを用いる必要がある。
Generally, when cultivating fish and shellfish, a cage is set up in seawater, and the fish and shellfish are cultured within the cage. Usually, a net is stretched around the seawater to form a cage, and the net is used to extend the fish and shellfish to the outside of the cage. However, in the early stage of aquaculture, farmed fish are still young fish with a body length of several centimeters, and in order to prevent the swimming of these young fish, In this case, it is necessary to use a very fine-mesh net to be placed in seawater.
ところが、潮汐変化が数ｍもあるような海域で
は、網が破損し易く、わずかな破損でも稚魚の場
合には容易に脱出できるため、網の保守、維持に
多大な労力と費用を要するという不都合が生じ、
このような不都合を解消するために、従来いけす
を設ける海域として、水深が深過ぎず、波が穏や
かで潮汐変化の少ないところが選定されるが、こ
のような条件を満たす海域であつても、台風等に
よる網の流失や船舶の接触による網の破損が発生
することがあり、やはり網の保守、維持に多大な
労力、費用を要し、網により確実に魚貝類の遊泳
を遮断することができないという問題点がある。 However, in sea areas where tidal changes can be as large as several meters, the nets are easily damaged, and even if the damage is slight, young fish can easily escape, resulting in the inconvenience of requiring a great deal of effort and expense to maintain and maintain the nets. occurs,
In order to eliminate these inconveniences, conventionally, the sea areas where the fish cages are installed are selected in areas where the water depth is not too deep, the waves are calm, and there are few tidal changes, but even in areas that meet these conditions, typhoons The nets may be washed away due to water pollution, etc., or damaged due to contact with ships, which requires a great deal of effort and expense to maintain and maintain the nets, and the nets cannot reliably block the swimming of fish and shellfish. There is a problem.
また、海洋牧場のように大規模な養殖を行なう
場合には、作用する網の全長が非常に長いものに
なり、網の保守、維持に要する労力、費用もそれ
だけ多大になり、魚貝類の遊泳遮断に網を用いる
ことは、大規模養殖の場合最良の方策とは言えな
い。 In addition, when carrying out large-scale aquaculture such as on 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 is not the best strategy for large-scale aquaculture.
そこで、本件出願人において、第５図に示す電
気スクリーン発生装置を提案している。 Therefore, the present applicant has proposed an electric screen generator shown in FIG.
すなわち、第５図に示すように、海水中に複数
個の上下方向の棒状導電電極１ａをほぼ等間隔に
配列し、各導電電極１ａを互いに電気的に接続し
て一方の電極列２ａを形成し、同様に海水中に複
数個の上下方向の棒状導電電極１ｂを電極列２ａ
の場合と同じピツチでほぼ等間隔に配列し、各導
電電極１ｂを互いに電気的に接続して他方の電極
列２ｂを形成し、両電極列２ａ，２ｂを互いに平
行に配設し、電気スクリーン発生用の電源３によ
り、一方の電極列２ａがアース電位になり他方の
電極列２ｂが所定電位V0になるように、両電極
列２ａ，２ｂ間にたとえば直流電圧を印加し、両
電極列２ａ，２ｂ間に電気スクリーンを発生させ
るものである。 That is, as shown in FIG. 5, a plurality of vertical rod-shaped conductive electrodes 1a are arranged in seawater at approximately equal intervals, and each conductive electrode 1a is electrically connected to each other to form one electrode row 2a. Similarly, a plurality of vertical rod-shaped conductive electrodes 1b are placed in an electrode array 2a in seawater.
The conductive electrodes 1b are electrically connected to each other to form the other electrode row 2b, and both electrode rows 2a and 2b are arranged parallel to each other to form an electric screen. For example, a DC voltage is applied between both electrode rows 2a and 2b by the generation power source 3 so that one electrode row 2a is at ground potential and the other electrode row 2b is at a predetermined potential V0 . An electric screen is generated between 2a and 2b.
このとき、両電極列２ａ，２ｂ間の距離をＬと
すると、両電極列２ａ，２ｂ間の電位分布は第６
図に示すような一定の傾きの直線状になり、従つ
て両電極列２ａ，２ｂ間の電界強度は第７図に示
すようにほぼ一定の値V0／Ｌとなる。ただし、
第６図および第７図において、横軸は一方の電極
列２ａから第２電極列２ｂまでの距離を示してい
る。 At this time, if the distance between both electrode rows 2a and 2b is L, the potential distribution between both electrode rows 2a and 2b is 6th.
As shown in the figure, it becomes a straight line with a constant slope, and therefore the electric field strength between both electrode rows 2a and 2b becomes a substantially constant value V 0 /L as shown in FIG. however,
In FIGS. 6 and 7, the horizontal axis indicates the distance from one electrode row 2a to the second electrode row 2b.
そして、このような電気スクリーンに侵入した
魚貝類は、電気的刺激を受け、電位強度が小さい
場合には驚いた状態を示し、電界強度が大きくな
るに連れて軽い痺れ、麻痺さらには仮死などの感
電反応を示し、前記電気スクリーンを遊泳通過す
ることができなくなり、当該電気スクリーンによ
り特定の範囲を囲むように両電極列２ａ，２ｂを
配設すれば、当該電気スクリーンで囲まれた範囲
に魚貝類が閉じこめられることになり、従来のよ
うに網を用いることなく魚貝類の遊泳が確実に遮
断され、潮位、潮汐、水深などの海洋条件や台風
などの気象条件に左右されることもなく、海洋牧
場などの大規模な養殖に適している。 Fish and shellfish that have entered such an electric screen are electrically stimulated, exhibiting a startled state when the electric field strength is low, and as the electric field strength increases, they exhibit mild numbness, paralysis, and even asphyxia. If the electrode arrays 2a and 2b are arranged so that a specific area is surrounded by the electric screen, the fish will exhibit an electric shock reaction and will be unable to swim through the electric screen. This means that the shellfish are trapped, and the swimming of fish and shellfish is reliably blocked without using nets as in the past, and it is not affected by ocean conditions such as tide level, tide, water depth, or weather conditions such as typhoons. Suitable for large-scale aquaculture such as ocean farms.
ところで、たとえば前記電気スクリーンに侵入
した魚体が電界方向と平行な場合、体長に相当す
る距離だけ離れた２点間の電位差による電流が魚
体に流れるため、体長の長い大型魚の場合、電気
スクリーンの電界強度が低くても、頭尾間の電位
差が大きくなり、魚体内を流れる電流もある程度
大きくなつて感電反応を示すのに対し、体長の短
い小型魚の場合、電気スクリーンの電界強度が低
ければ、頭尾間の電位差が大きくならないため、
魚体内を流れる電流も大きくならず、感電反応を
示さない。 By the way, for example, if a fish body that has entered the electric screen is parallel to the direction of the electric field, a current will flow through the fish body due to the potential difference between two points separated by a distance equivalent to the body length. Even if the intensity is low, the electric potential difference between the head and the tail becomes large, and the current flowing inside the fish increases to some extent, causing an electric shock reaction.In contrast, in the case of small fish with short bodies, if the electric field intensity of the electric screen is low, the head Since the potential difference between the tails does not become large,
The current flowing inside the fish does not become large and does not cause an electric shock reaction.
すなわち、同じ電界強度であつても、大型魚と
小型魚とでは電気スクリーンにより受ける電気的
刺激の度合が異なり、大型魚および小型魚が示す
感電反応も異なることになる。 That is, even if the electric field strength is the same, large fish and small fish receive different degrees of electrical stimulation from the electric screen, and large fish and small fish exhibit different electric shock reactions.
しかし、前記したように、第５図の両電極列２
ａ，２ｂ間に発生する電気スクリーンの電界強度
が一定であるため、当該電界強度を小型魚が驚く
程度の値に設定すると、前記電気スクリーンに大
型魚が侵入した場合、大型魚は強い電気的刺激を
受けて仮死さらには致死状態になり、大型魚が電
気的刺激により損傷し、逆に前記電気スクリーン
の電界強度を、大型魚が驚く程度の値に設定する
と、前記電気スクリーンに小型魚が侵入した場
合、小計魚は電気的刺激をほとんど受けずにその
まま電気スクリーンを遊泳通過してしまい、小型
魚の遊泳を遮断できなくなるという問題点があ
る。
However, as mentioned above, both electrode rows 2 in FIG.
Since the electric field strength of the electric screen generated between a and 2b is constant, if the electric field strength is set to a value that will surprise small fish, if a large fish enters the electric screen, the large fish will be exposed to a strong electric field. If a large fish is damaged by the electrical stimulation, causing asphyxia or even death due to stimulation, and conversely, if the electric field strength of the electric screen is set to a value that is surprising to the large fish, small fish will be exposed to the electric screen. If the small fish invade the electric screen, the small fish will simply swim through the electric screen without receiving any electrical stimulation, and there is a problem in that it will not be possible to block the small fish from swimming.
そこで、この発明は、４列の電極列間の電界強
度が順次に高くなるようにし、大型、小型にかか
わらず、魚貝類の遊泳を確実に遮断し、かつ魚貝
類の電気的刺激による損傷を防止することを技術
的課題とする。 In view of this, this invention increases the electric field strength between the four rows of electrodes in order to reliably block the swimming of fish and shellfish, regardless of whether they are large or small, and to prevent damage to fish and shellfish caused by electrical stimulation. The technical challenge is to prevent this.
この発明は、前記の点に留意してなされたもの
であり、海水中にそれぞれ複数個の導電電極がほ
ぼ等間隔に配列されて形成され互いに平行に配設
された４列の電極列と、前記各電極列それぞれの
前記各導電電極を互いに電気的に接続した接続体
と、前記各電極列間の電界強度が順次に高くなる
ように前記各電極列間に電圧を印加する電気スク
リーン発生用の電源とを備えたことを特徴とする
電気スクリーン発生装置である。
This invention has been made with the above-mentioned points in mind, and includes four rows of electrodes each formed in seawater with a plurality of conductive electrodes arranged at approximately equal intervals and arranged in parallel to each other; A connection body that electrically connects the conductive electrodes of each of the electrode rows to each other, and an electric screen generating device that applies a voltage between each of the electrode rows so that the electric field strength between each of the electrode rows increases sequentially. This is an electric screen generator characterized in that it is equipped with a power source.
したがつて、この発明では、海水中では平行に
配設された４列の電極列間の電界強度が順次に高
くなるように、電気スクリーン発生用の電源によ
り電圧が印加され、電界強度が順次に高くなる電
気スクリーンが形成され、大型の魚貝類は電界強
度の低い領域において軽い電気的刺激を受け、損
傷を受ける前に電気スクリーンから脱出すること
が可能となり、小型の魚貝類は電界強度の高い領
域において軽い電気的刺激を受け、大型、小型に
かかわらず、魚貝類の遊泳が確実に遮断されると
同時に、魚貝類の電気的刺激による損傷が防止さ
れる。
Therefore, in this invention, a voltage is applied by a power source for generating an electric screen so that the electric field strength between four rows of electrodes arranged in parallel in seawater increases sequentially. Larger fish and shellfish receive mild electrical stimulation in areas with lower electric field strength, allowing them to escape from the electric screen before being damaged, while smaller fish and shellfish receive lower electric field strength. A light electrical stimulation is received in a high area, and the swimming of fish and shellfish, regardless of whether they are large or small, is reliably blocked, and at the same time, damage to fish and shellfish caused by electrical stimulation is prevented.
つぎに、この発明を、その１実施例を示した第
１図ないし第４図とともに詳細に説明する。
Next, the present invention will be explained in detail with reference to FIGS. 1 to 4 showing one embodiment thereof.
第１図および第２図において、４ａ，４ｂ，４
ｃ，４ｄは海水中に互いに平行に配設された第１
ないし第４電極列であり、それぞれ複数個の上下
方向の棒状導電電極５ａ，５ｂ，５ｃ，５ｄがほ
ぼ等間隔に配列されて形成され、図示されていな
い接続体により、各電極列４ａ〜４ｄそれぞれの
各導電電極５ａ〜５ｄが互いに電気的に接続され
ている。 In Figures 1 and 2, 4a, 4b, 4
c and 4d are the first
to fourth electrode rows, each of which is formed by arranging a plurality of vertical rod-shaped conductive electrodes 5a, 5b, 5c, and 5d at approximately equal intervals, and each electrode row 4a to 4d is The respective conductive electrodes 5a to 5d are electrically connected to each other.
６ａ，６ｂは電気スクリーン発生用の電源であ
り、該両電源６ａ，６ｂそれぞれにより、アース
電極としての第１、第２電極列４ａ，４ｂと第３
電極列４ｃとの間、および第１、第２電極列４
ａ，４ｂと第４電極列４ｄとの間に、各電極列４
ａ，４ｂ，４ｃ，４ｄ間の電界強度が順次に高く
なるように、たとえば直流電圧が印加され、各電
極列４ａ〜４ｄ間に３重の電気スクリーンが形成
される。 Reference numerals 6a and 6b are power supplies for generating an electric screen, and these power supplies 6a and 6b respectively connect the first and second electrode arrays 4a and 4b and the third electrode array as ground electrodes.
between the electrode row 4c and the first and second electrode rows 4
Each electrode row 4 is provided between a, 4b and the fourth electrode row 4d.
For example, a DC voltage is applied so that the electric field strength between a, 4b, 4c, and 4d increases sequentially, and a triple electric screen is formed between each electrode row 4a to 4d.
そして、たとえば第２図に示すように、第１、
第２電極列４ａ，４ｂ間の距離をL1、第２、第
３電極列４ｂ，４ｃ間の距離をL2、第３、第４
電極列４ｃ，４ｄ間の距離をL3とし、電源６ａ，
６ｂの電圧印加による各電極列４ａ〜４ｄそれぞ
れの電位を０、V1、V2、V3（V1＜V2＜V3）とす
ると、各電極列４ａ〜４ｄ間の電位分布は第３図
に示すような折線になるとともに、各電極列４ａ
〜４ｄ間の電界強度分布は第４図に示すような階
段状になる。ただし、第３図、第４図において、
横軸は第１電極列４ａからの距離を示している。 For example, as shown in FIG.
The distance between the second electrode rows 4a and 4b is L 1 , the distance between the second and third electrode rows 4b and 4c is L 2 , and the distance between the second and third electrode rows 4b and 4c is L 2 .
The distance between the electrode rows 4c and 4d is L 3 , and the power supplies 6a,
Assuming that the potentials of each electrode row 4a to 4d due to the voltage application of voltage 6b are 0, V 1 , V 2 , V 3 (V 1 <V 2 <V 3 ), the potential distribution between each electrode row 4a to 4d is as follows. Each electrode row 4a becomes a broken line as shown in FIG.
The electric field intensity distribution between 4d and 4d has a step-like shape as shown in FIG. However, in Figures 3 and 4,
The horizontal axis indicates the distance from the first electrode row 4a.
このとき、第４図に示すように、第１、第２電
極列４ａ，４ｂ間の電界強度E1はE1＝V1／L1、
第２、第３電極列４ｂ，４ｃ間の電界強度E2は
E2＝（V2−V1）／L2、第３、第４電極列４ｃ，
４ｄ間の電界強度E3はE3＝（V3−V2）／L3とな
り、しかもE1＜E2＜E3であるため、たとえば第
１電極列４ａを内側にして特定の範囲を囲むよう
にし各電極列４ａ〜４ｄを配設すれば、前記範囲
内の魚貝類のうち、大型の魚貝類が電気スクリー
ンに侵入すると、内側の第１、第２電極列４ａ，
４ｂ間の電界強度の低い領域において軽い電気的
刺激を受け、外側の第３、第４電極列４ｃ，４ｄ
間の電界強度の高い領域に達して強い電気的刺激
により損傷を受ける前に前記電気スクリーンから
前記範囲内へ脱出することが可能となり、小型の
魚貝類が前記電気スクリーンに侵入すると、内側
の第１、第２電極列４ａ，４ｂ間の電界強度の低
い領域を、電気的刺激を受けることなく通過し、
第２、第３電極列４ｂ，４ｃ間あるいは第３、第
４電極列４ｃ，４ｄ間の電界強度の高い領域にお
いて軽い電気的刺激を受け、電気的刺激による損
傷を受けることなく前記範囲内へ脱出することが
可能となる。 At this time, as shown in FIG. 4, the electric field strength E 1 between the first and second electrode rows 4a and 4b is E 1 =V 1 /L 1 ,
The electric field strength E 2 between the second and third electrode rows 4b and 4c is
E 2 =(V 2 −V 1 )/L 2 , third and fourth electrode rows 4c,
The electric field strength E 3 between 4d is E 3 = (V 3 - V 2 )/L 3 , and since E 1 < E 2 < E 3 , for example, if a specific range is covered with the first electrode row 4a inside, If the electrode rows 4a to 4d are arranged so as to surround each other, when a large fish and shellfish within the range enters the electric screen, the inner first and second electrode rows 4a,
The outer third and fourth electrode rows 4c and 4d receive light electrical stimulation in the region of low electric field strength between 4b and 4b.
It is possible for small fish and shellfish to escape from the electric screen into the area before reaching the area of high electric field strength between them and being damaged by strong electrical stimulation. 1. Pass through the region of low electric field strength between the second electrode rows 4a and 4b without receiving electrical stimulation;
A light electrical stimulus is received in a region with high electric field strength between the second and third electrode rows 4b and 4c or between the third and fourth electrode rows 4c and 4d, and the electric field is moved within the above range without being damaged by the electrical stimulation. It becomes possible to escape.
一方、前記範囲外の外来魚貝類が前記電気スク
リーンに侵入すると、大型、小型にかかわらず、
外側の第３、第４電極列４ｃ，４ｄ間の電界強度
の高い領域において電気的刺激を受け、前記電気
スクリーンを遊泳通過することができないため、
前記範囲内への外来魚貝類の侵入が阻止されるこ
とになる。 On the other hand, if foreign fish and shellfish outside the above range invade the electric screen, regardless of whether they are large or small,
Because it is electrically stimulated in the region of high electric field strength between the outer third and fourth electrode rows 4c and 4d and cannot swim through the electric screen,
Invasion of foreign fish and shellfish into the area will be prevented.
なお、各導電電極５ａ〜５ｄは前記した棒状の
ものに限るものではない。 Note that the conductive electrodes 5a to 5d are not limited to the rod-shaped ones described above.
また、電気スクリーン発生用の電源により各電
極列４ａ〜４ｄ間に交流電圧またはパルス電圧を
印加してもよいものは勿論である。 It goes without saying that an AC voltage or a pulse voltage may be applied between each electrode array 4a to 4d by a power source for generating an electric screen.
さらに、第４電極列４ｄ側から各電極列４ｄ〜
４ａ間の電界強度が順次に高くなるようにしても
よい。 Further, from the fourth electrode row 4d side, each electrode row 4d~
The electric field strength between 4a may be made to increase sequentially.
以上のように、この発明の電気スクリーン発生
装置によると、海水中に平行に配設した第１ない
し第４電極列４ａ〜４ｄ間の電界強度が順次に高
くなるように、電気スクリーン発生用の電源６
ａ，６ｂにより電圧を印加し、電界強度が順次に
高くなる電気スクリーンを形成したため、大型の
魚貝類は電界強度の低い領域において軽い電気的
刺激を受け、損傷を受ける前に電気スクリーンか
ら脱出することができ、小型の魚貝類は電界強度
の高い領域において軽い電気的刺激を受け、損傷
を受けることなく電気スクリーンから脱出するこ
とができ、大型、小型にかかわらず、魚貝類の遊
泳を確実に遮断できると同時に、魚貝類の電気的
刺激による損傷を防止することができ、養殖魚貝
類を保護することができ、その効果は極めて大き
い。
As described above, according to the electric screen generation device of the present invention, the electric screen generation device is configured such that the electric field strength between the first to fourth electrode arrays 4a to 4d arranged in parallel in seawater increases sequentially. power supply 6
By applying voltage through a and 6b, an electric screen was formed in which the electric field strength increased sequentially, so large fish and shellfish received mild electrical stimulation in areas with low electric field strength, and escaped from the electric screen before being damaged. Small fish and shellfish can receive mild electrical stimulation in areas with high electric field strength and can escape from the electric screen without being damaged, ensuring the swimming of fish and shellfish, regardless of whether they are large or small. At the same time, it is possible to block fish and shellfish from being damaged by electrical stimulation, and it is possible to protect cultured fish and shellfish, which is extremely effective.
第１図ないし第４図はこの発明の電気スクリー
ン発生装置の１実施例を示し、第１図は斜視図、
第２図は概略構成図、第３図は電位分布図、第４
図は電界強度分布図、第５図はこの発明と比較さ
れる電気スクリーン発生装置の概略構成図、第６
図および第７図は第５図の装置における電位分布
図および電界強度分布図である。
４ａ〜４ｄ……第１〜第４電極列、５ａ〜５ｄ
……導電電極、６ａ，６ｂ……電源。
1 to 4 show one embodiment of the electric screen generator of the present invention, FIG. 1 is a perspective view,
Figure 2 is a schematic configuration diagram, Figure 3 is a potential distribution diagram, and Figure 4 is a diagram of the potential distribution.
The figure is an electric field strength distribution diagram, Figure 5 is a schematic configuration diagram of an electric screen generator compared with this invention, and Figure 6
The figure and FIG. 7 are a potential distribution diagram and an electric field strength distribution diagram in the apparatus of FIG. 5. 4a to 4d...first to fourth electrode rows, 5a to 5d
...Conductive electrode, 6a, 6b...Power supply.
Claims (1)
間隔に配列されて形成され互いに平行に配設され
た４列の電極列と、前記各電極列それぞれの前記
各導電電極を互いに電気的に接続した接続体と、
前記各電極列間の電界強度が順次に高くなるよう
に前記各電極列間に電圧を印加する電気スクリー
ン発生用の電源とを備えたことを特徴とする電気
スクリーン発生装置。1. Four rows of electrodes formed in seawater with a plurality of conductive electrodes arranged at approximately equal intervals 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,
An electric screen generating device comprising: a power source for generating an electric screen that applies a voltage between each of the electrode rows so that the electric field strength between each of the electrode rows increases sequentially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015354A JPS62176099A (en) | 1986-01-27 | 1986-01-27 | Electric screen generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61015354A JPS62176099A (en) | 1986-01-27 | 1986-01-27 | Electric screen generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176099A JPS62176099A (en) | 1987-08-01 |
| JPH0442793B2 true JPH0442793B2 (en) | 1992-07-14 |
Family
ID=11886460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61015354A Granted JPS62176099A (en) | 1986-01-27 | 1986-01-27 | Electric screen generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62176099A (en) |
-
1986
- 1986-01-27 JP JP61015354A patent/JPS62176099A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62176099A (en) | 1987-08-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |