Cod unblushing by new laser camera

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When floating rigs or pipelines have to be inspected, when a turn of sea exclude has to be established, or when fishing vessels need to know if their trawls are scooping adult fish of authorised size, it would be a genuine advantage to have a camera that can see prolonged distances. As a partner in a vital general project, DTU is concerned in building an modernized 3D underwater camera formed on lasers and with a ability to dig a low dim water, whose murkiness is attributable to a miss of object and high concentrations of particles.


The record is already used on dry land—at airports in misty conditions, for example—and a 7 European partners are now operative to adjust this record for use underneath water. Professor Andre Visser from DTU Aqua is obliged for coordinating DTU’s grant to Utofia, a EU-funded project.

“The camera’s operation is 3 times that of a best on a marketplace today, and it can guard a volume of H2O 100 times bigger. It’s ideal for a oil industry, where it can be used to check infrastructure underneath a waves, or for fishing, environmental monitoring and research. Fitting a 3D camera to a remotely tranquil mini-submarine—known as a ROV (Remotely Operated Vehicle)—makes it probable to save a cost and discharge a risk compared with promulgation divers down. Moreover, it will nullify a need to draw floating rigs into pier and spend outrageous sums inspecting them each second year,” he says.

Working closely with a plan managers from a Norwegian investigate establishment SINTEF, Andre Visse, Jane Behrens and a tyro from Aquatic Science and Technology at DTU have recently tested a antecedent of a laser-assisted camera during National Aquarium Denmark, ‘Den Blå Planet’. The purpose was to settle possibly a laser light affects a physiology and poise of a cod. Loggers were extrinsic into 10 cod to magnitude their cardiac rhythm, and a fish were concurrently filmed regulating apparatus including stereo cameras featuring tracking to establish how they position themselves in a tank, and how quick they swim. Jane Behrens, Senior Researcher, relates:

“When you’ve grown a apparatus like this camera, we naturally have to make certain that it doesn’t furnish unintended side effects in propinquity to a tasks we wish it to perform. We’re not totally finished with a analyses, though so distant there’s zero in a measurements of possibly heart rate or swimming poise to prove that a cod were fearful by a camera. On a basement of many prior studies, we know that a cardiac stroke is a arguable indicator of highlight in fish. During a initial tests, a fish seemed totally unphased by a laser and were happy to float tighten in front of it, even when it was switched on.”

The subsequent step will be to use a DTU investigate vessel Havfisken to exam a camera in a waters of a Øresund.

The finished product will cost somewhere in a segment of EUR 20,000. DTU is concurrently participating in a Danish plan to rise a smaller and easier camera dictated for use on tiny fishing vessels, for example, to check possibly a fishing apparatus is positioned rightly in a H2O and providing optimal fishing.

Source: DTU