Title:
ELECTRIC SCREEN DEVICE
Document Type and Number:
WIPO Patent Application WO/1998/052387
Kind Code:
A1
Abstract:
In an electric screen device (2) which is constituted of a pair of electrode members (12 and 12) opposedly positioned on both sides of a water inlet channel (1) and a DC pulse impressing device (13) for impressing a DC pulse across the members (12 and 12) and checks the entrance of a living thing into the channel (1), the product of the peak value of the electric field created between the members (12 and 12) and the body length of the living thing to be checked is more than 0.1 V, the impressing time of the DC pulse falls within a range from (2) msec to 200 msec, and the duty factor of the DC pulse is less than 0.5.
Inventors:
MAEHATA HIDEHIKO (JP)
TSUKAHARA MASANORI (JP)
TAMAKOSHI DAISUKE (JP)
SUZAKI TOMOHIKO (JP)
ISAWA YUTAKA (JP)
TSUKAHARA MASANORI (JP)
TAMAKOSHI DAISUKE (JP)
SUZAKI TOMOHIKO (JP)
ISAWA YUTAKA (JP)
Application Number:
PCT/JP1998/001203
Publication Date:
November 19, 1998
Filing Date:
March 19, 1998
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO (JP)
MAEHATA HIDEHIKO (JP)
TSUKAHARA MASANORI (JP)
TAMAKOSHI DAISUKE (JP)
SUZAKI TOMOHIKO (JP)
ISAWA YUTAKA (JP)
MAEHATA HIDEHIKO (JP)
TSUKAHARA MASANORI (JP)
TAMAKOSHI DAISUKE (JP)
SUZAKI TOMOHIKO (JP)
ISAWA YUTAKA (JP)
International Classes:
H05C1/04; (IPC1-7): H05C1/04
Foreign References:
| JPH0782914B2 | 1995-09-06 | |||
| JPH01274395A | 1989-11-02 | |||
| US4750451A | 1988-06-14 | |||
| US4580525A | 1986-04-08 |
Other References:
THE PIPING ENGINEERING, Vol. 38, No. 8, (1996), MASANORI TSUKAHARA, "System for Preventing Fish from Entering by Means of Electric Screen (in Japanese)", p. 1-6.
PROCEEDINGS OF THE INSTITUTE OF ELECTROSTATICS JAPAN, Vol. 20, No. 2, (1996), HIDEHIKO MAEHATA, "Underwater Fence Electric Screen (in Japanese)", p. 62-67.
THE TECHNICAL RESEARCH CENTER OF THE KANSAI ELECTRIC POWER CO. INC., Vol. 50, (1994), TOKUICHI KIMURA, "Prevention of Entrance of Fish Into Water Intake of Hydraulic Power Plant by Means of Electric Screen (in Japanese)", p. 131-139.
THE HITACHI ZOSEN TECHNICAL REVIEW, Vol. 54, No. 2, (1993), HIDEHIKO MAEHATA, "Development of System for Preventing Fish from Entering Inlet/Outlet of Power Plant by Means of Electric Screen (in Japanese)", p. 141-145.
R&D NEWS KANSAI, No. 306, (1993), TOKUICHI KIMURA, "Prevention of Entrance of Fish Into Water Intake of Hydraulic Power Plant by Means of Electric Screen Part II (in Japanese)", p. 6-7.
See also references of EP 0984671A4
PROCEEDINGS OF THE INSTITUTE OF ELECTROSTATICS JAPAN, Vol. 20, No. 2, (1996), HIDEHIKO MAEHATA, "Underwater Fence Electric Screen (in Japanese)", p. 62-67.
THE TECHNICAL RESEARCH CENTER OF THE KANSAI ELECTRIC POWER CO. INC., Vol. 50, (1994), TOKUICHI KIMURA, "Prevention of Entrance of Fish Into Water Intake of Hydraulic Power Plant by Means of Electric Screen (in Japanese)", p. 131-139.
THE HITACHI ZOSEN TECHNICAL REVIEW, Vol. 54, No. 2, (1993), HIDEHIKO MAEHATA, "Development of System for Preventing Fish from Entering Inlet/Outlet of Power Plant by Means of Electric Screen (in Japanese)", p. 141-145.
R&D NEWS KANSAI, No. 306, (1993), TOKUICHI KIMURA, "Prevention of Entrance of Fish Into Water Intake of Hydraulic Power Plant by Means of Electric Screen Part II (in Japanese)", p. 6-7.
See also references of EP 0984671A4
Attorney, Agent or Firm:
Morimoto, Yoshihiro (4th floor 10-10, Nishi-Hommachi 1-chome, Nishi-k, Osaka-shi Osaka, JP)
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