Vol.07 Is underwater drone collecting dead fish at the farm?[Drone demonstration experiment report] | DRONE

Space One, which works on underwater drones, inspections, surveys, and operating schools, and Dainichi, who runs a fishery business based in Uwajima City, Ehime Prefecture, at a tuna and red sea bream farm on June 22, 2021., Demonstration experiments using underwater drones were jointly held.

Underwater drone has doubled the "net confirmation frequency"

Dainichi is a long -established fishery company that has been established for about 40 years.He has been involved in the aquaculture industry, working on manufacturing and selling feed for fisheries for aquaculture, supporting fisheries, and supporting farmers.

In 2020, the company has acquired international authentication of the world's first ACS (Aquaculture StewardShip Council) in red sea bream, which is produced with affiliated companies in affiliated companies.

Since 2019, Dainichi and Utsumi Fisheries have been using CHASING's GLADIUS mini for net inspection and fish status checks in the farm farms in 2019.The red sea bream, which is cultivated by the two companies, has been sold as a high -quality brand "deep -sea cultivated bream" that sinks a fish cage up to about 30m, as in the habitat of natural red sea bream, and is tight and bright.There is.

Tetsuji Terasaka, a business promotion section who driven underwater drone introduction in Dainichi, said how he considered the introduction of underwater drones.

Terasaka: There is a danger of diving work, such as sharks rarely around the fish cage, and if you dive on a daily basis, check the net and collect dead fish, you will be very tired.If you ship, feed, and dive further, it will be really overwhelming.It's still good when you are young, but you don't have your body when you get older.

Taiichi Oda, President of Utsumi Fisheries, talks about the effects of underwater drones.

Oda: Before the introduction of underwater drones, I was diving up to 30m in depth about once a month.Since I started using underwater drones, I was able to check the status of nets and fish once every two weeks, rather than once a month.

In particular, if the obi -shaped red tide spreads under the net, it is not clear from the water, and there is a risk that a large amount of aquaculture fish will die, so it is very possible to increase the frequency of confirmation without physical burden.It helps.

Use Chasing M2 Pro

There are two directions for utilizing underwater drones in this certificate.One is a camera mounted on an underwater drone as before, and "see" the water without diving.Various uses were expected, such as the tears of the net and the status of the incidental, checking whether the dead fish had occurred, and the search for anchors when the rope connecting the fish cage was broken.

The used aircraft is CHASING M2 Pro.It is a new model just released in the spring of 2021.The 4K camera and the high -brightness LED showed the nets and fish clearly, and it was confirmed that both the tuna cage with a depth of about 15m and the red sea bream cage of about 10m and 30m were sufficiently "alternative to the eyes".

The cable of the underwater drone aircraft was caught in the mouth of the tuna, and the visibility worsened due to the winding of the mud on the bottom of the water, but avoiding such a situation seems to be fully useful for inspection of the net.

What impressed me was that when I dive, the two companies commented that the dive speed was much faster than the GLADIUS mini used so far.When used in daily work, including shipping work, it is not possible to bite only underwater drones.I felt that the dive speed, which can reach the target point quickly, is an important indicator in business efficiency.

Another direction of the utilization of underwater drones is to "grab" underwater things without diving, using an arm that can now be equipped with the aircraft.What was particularly expected was the collection of dead fish.If you dive underwater drones, you can find a dead fish, so it would be best if you could collect it on the spot.

The CHASING M2 Pro has multiple arms with different tip shapes, and the cable anti -load is about 100 kg.Unfortunately, adult fish of tuna seemed to be difficult to grasp the current arm in size, but in consideration of underwater buoyancy, it can be collected in heavy weight.

Trial and error to challenge dead fish collection

In this demonstration, the challenge for collecting dead fish was very impressive.Originally, in South American Chile, which is obliged to collect dead fish in the farm by law, there are cases in which the dead fish is collected using CHASING M2, and this proof also wants to follow this.there were.

Terasaka: If you know in advance that there are no dead fish, you don't have to dive, so I want to do as much as possible.Because you can find a dead fish with an underwater drone, if you can collect it on the spot, you will not have to dive and reduce the load on the site staff.

In this demonstration, we have tried to collect it with an optional product arm on the underwater drone, and to make a commercially available network on the aircraft.At the farm in the red sea bream, a dead fish sinking on the net was found and collected it with a net.

A variety of ideas came out of the site staff about how to collect dead fish and equipment.

It's a serious look at how to use the new aircraft.At present, there are no optional products in the market that specializes in collecting dead -fish in the farm, but it was a demonstration experiment that felt that trial and error in such sites would be a breakthrough.