• Mech Update #03

    Erin RobotGrrl15 hours ago 0 comments

    The servo fits and the magnetic coupling attaches:

    Here is what the CAD assembly of the 5 separate 3D printed pieces looks like:

    Read on for more about the tweaks needed and next steps!

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  • Mech Update #02

    Erin RobotGrrl3 days ago 0 comments

    This update is all about iterating the servo block assembly. The servo block will be inside of the intelligent buoy enclosure (Nalgene bottle). It needs to be attached with magnets to the rest of the stages because the dimensions are too small for a direct attachment.

    Decreasing the size of the servo block assembly was iterated on 3 times since the last update.

    Read more for CAD screenshots and photos of the 3D print!

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  • Information about Sleeve Bearings

    Erin RobotGrrl3 days ago 0 comments

    It's likely we'll be using a sleeve bearing made from HDPE in the rope spool box. It was interesting to see design of these is somewhat like an art. Check out this project log for my research notes! 

    What are sleeve bearings? This presentation is useful review.

    [source]

    Read on for more of my notes!
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  • Mech Update #01

    Erin RobotGrrl6 days ago 0 comments

    This week, prototyping has started! Here's an update on what's been happening so far from the mechanical side. 

    Read more for prototyping for experiment #1, the spool box mockup, gifs of waves, and more learnings.

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  • Eja in the heart of the fishers

    Oluwatobi Oyinlola07/27/2020 at 13:02 0 comments

    When we started the project, it important we gather as many data as possible one of the thing I tried to do locally is to understand the challenges they are facing around the ghost gears issues and we can solve it for the.

    We realized that the problem is different from each country like in Nigeria, some fishermen have been fishing for over 100 years and its difficult for them to just change the way they are used to about fishing.

    But it gave us a great insight into different problems they are facing, chatting with a  fisherman he said "When you cast your net, you cast it with lot of aspiration that you might eventually get a catch. While doing that, what is the effect on the environment? Yes GARBAGE  and lost of the fishing gears"

    It shows they are also concern about the garbage and they are opened to solve it, based on my research, three communities in Nigeria are faced with the general and most common problem which is GHOST GEARS. Some fishermen that have little knowledge of environmental challenges burn theirs, but others didn't even care about it.

  • Bycatch Agreements and Regulations

    Leonardo Ward07/22/2020 at 04:43 0 comments

    When fishing gear is lost, abandoned or discarded in the marine environment it continues to capture marine wildlife; the gear creates a risk of entanglement that leads to injuries and death. 

    Ghost gear is a source of marine mammal bycatch because the fishermen do not have access to the marine wildlife that is being caught, they can’t sell it or even release it from the gear. 

    NOAA Fisheries, also known as The National Marine Fisheries Service, is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce of the United States. To reduce marine mammal bycatch associated with international commercial fishing NOAA Fisheries issued a rule that establishes a marine mammal bycatch criteria for U.S. imports in 2016. This rule not only marks and important step forward in marine mammal conservation, it also incentives fishers to adopt new techniques and technologies to lower the risk of bycatch. 

    Dolphins are a common bycatch in fisheries, especially in tuna fishing operations. To minimize dolphin fatalities the the Agreement on the International Dolphin Conservation Program (AIDCP) entered into force in February 1999. Their objectives are:

    • Progressively reduce incidental dolphin mortalities in the tuna purse-seine fishery in the Agreement Area to levels approaching zero, through the setting of annual limits.
    • Seek ecologically sound means of capturing large yellowfin tunas not in association with dolphins.
    •  Ensure the long-term sustainability of the tuna stocks in the Agreement Area

  • Initial Concept Review Presentation

    Erin RobotGrrl07/20/2020 at 12:23 0 comments

    Join us for our initial concept review presentation to our nonprofit partner, Conservation X Labs! In the presentation, we will showcase our solution concept — how we reached that idea, and the reasons for it. We will be LIVE on YouTube at 12pm PT / 3pm ET. Get your tickets here.

    We are looking forward to hearing the feedback from Conservation X Labs to see if our concept is headed in a useful direction, or if we need to gather further information.

    You can see our one pager here, and the slides for our presentation here in the downloads section.

    Special thanks to the @Supplyframe DesignLab team for their behind the scenes effort to make this happen. See you on the livestream!

  • Tech for Fishers: Survey!

    Erin RobotGrrl07/18/2020 at 04:02 0 comments



    Do YOU know a fisher? Know a friend who knows a fisher? We’d be super appreciative if they could fill out our Tech for Fishers survey!

    >>>>>>> bit.ly/fishers-survey <<<<<<<

    We want to get the best understanding possible, so fisher’s input is incredibly valuable to this. Thanks in advance, Hackaday community, if anyone out there knows any fishers!

    Did you know? Fishers often grow into their profession when it’s a family run operation. In a way, they could begin training by the time they are 7 years old!

  • Concept of Operations

    Leonardo Ward07/13/2020 at 16:31 0 comments

    Problem

    How might we decrease the occurrence of marine species entanglements with fishing gear and decrease ghost gear creation, while making the commercial fishing process more intelligent for fisheries?

    Since 2007 studies of removed gear from whales showed that 91% of cases involved vertical lines. Abandoned gear continues to catch fish and not only creates harmful environmental and ecological effects, it also causes socioeconomic consequences. In 2016 the removal of 34,408 abandoned pots led to gear efficiency gains and an additional 13,504 MT in harvest valued at US $21.3 million. Up to 10% of the world’s ocean plastic (and 70% of large pieces) comes from lost or abandoned fishing gear. The principal causes of lost fishing gear are unexpected position changes and entanglements. 

    Goal

    The main goal is the prevention of gear loss. A great solution not only benefits the environment but also benefits the fishers, they can avoid the income losses that ghost gear creates and also benefit from an intelligent gear that collaborates to improve their efficiency. 

    Operations Process

    • Fishers install the device in the gear, and define the maximum time that it will be underwater. Later, the fishers deploy the gear onto the water. The device stores its location and sends it to the server/app.
    • The traps wait on the seafloor during the predefined time. 
    • The buoy is released if the time lapse ends or if the device detects that the trap has reached its full capacity. When the buoy gets to the surface it transmits its location.
    • The fishers find the buoy and retrieve the gear.

  • Gear Comparison and Specifications

    Erin RobotGrrl07/13/2020 at 01:47 0 comments

    While narrowing in on our project scope, we were trying to determine the gear type should we specifically design for, and / or test with. We learned from @Oluwatobi Oyinlola  ’s interview with a fisher that they primarily use passive gear.

    When comparing two types of passive gear: traps & pots and longlines, they are diametrically opposed on value vs quantity of landings.

    This makes for a dilemma in choosing a gear type as a prime candidate for testing and designing! Read on for more information, and gear distance specifications.

    Read more »