FISH PROTECTION DEVICE (EMBODIMENTS) Russian patent published in 2023 - IPC E02B8/08 

FIELD: fisheries.

SUBSTANCE: invention can be used to prevent or reduce the likelihood of fish getting into hydraulic structures and/or water intake devices. The fish protection device includes a control unit, a switch with keys, a power source and emitters capable of inducing a positive or negative reaction in fish and a forced change in the direction of movement, as well as a fish counting device and a unit for evaluating the efficiency of the fish protection device. Device performance K_ef is evaluated according to the formula Kef = 100%·(N₀-N)/N₀, where N₀ is the number or concentration of fish in the water flow directed to the hydraulic structure and/or water intake device, when the fish protection device or part of it is not working, N is the number or concentration of fish in the water flow directed to the hydraulic structure and/or device water intake, during the operation of the fish protection device. In another embodiment, the fish protection device includes a controller instead of a control unit.

EFFECT: group of inventions provides prevention or reduction of the probability of fish getting into hydraulic structures and/or water intake devices.

81 cl, 7 dwg