Mechanism for gauging the catch within a trawl net
AssigneeSimrad A.S.
InventorsKjell Oystein Ramberg, Bjorn Kirknes
Life of this patent
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Abstract
The present invention is related to a mechanism for guaging the expansion of a trawl net in correspondence with the number of fish caught within the trawl. The mechanism includes sensors adapted to be fastened to the masks of the trawl net in order to sense changes in the geometry of the mask. Each sensor includes a permanent magnet and a reed contact disposed to be activated by the magent as a result of a predetermined trawl net expansion, thereby transmitting a signal indicative of such expansion to a detection and indication mechanism located on board an associated trawler.
Claims9
Apparatus for gauging the catch within a trawl net comprising:
- at least one sensor disposed to sense a change in the geometry of the trawl net and providing an output signal indicative of such change;
- a modulator receiving the output signals from said sensor and in response thereto generating a modulated signal;
- a transmitter coupled to said modulator for receiving the modulated signal and transmitting such signal;
- a receiver detecting the transmitted signal as an indication of the state of said sensor;
- and
- an indicator coupled to said receiver and providing an indication of the state of said sensor.
Dependencies are inferred from the claim text.