PRE2022 3 Group7

Buoy based remote sensing

Group members

Names	Study	ID	Email
Max van Wijk	Electrical Engineering	1736418	m.h.o.v.wijk@student.tue.nl
David van Warmerdam	Electrical Engineering	1714171	d.s.v.warmerdam@student.tue.nl
Luka Tepavčević	Electrical Engineering	1720996	l.tepavcevic@student.tue.nl
Bob Verbeek	Biomedical Engineering	1752510	b.m.verbeek@student.tue.nl
Yu-Hsuan Lin	Computer Science	1672363	y.lin1@student.tue.nl
Saskia ten Dam	Psychology and Technology	1577328	s.e.t.dam@student.tue.nl

Seperate pages of important information

Logbook page: This page contains the logbook, how much time everyone spend per week, and the general planning of group 7.

Interview page: This page contains the interviews that have been conducted by group 7, a summary of each interview, as well as some small descriptions of the interviewees to give some background.

Weekly research and activities : This page contains, for every week, a summary and overview of the deliverables of group 7. The contents of the page have been structured in chronological order. <==== For the tutors, this is where the document that was originally on this page resides now. This has been done for us to start making an overview of how the final wiki page will look.

!!IMPORTANT!!

The order and contents of all of these sections is NOT set in stone, if you feel like a section should go somewhere else, have different content, or be outright removed, please do so (with consent of course).

Introduction

What will be written here:

• A quick summary of coral reefs:
  • What types or coral reefs there are.
  • Why coral reefs are important.
  • What is currently done to protect coral reefs, and what is still missing (state of the art). <= most important part as this is what we're trying to solve

Problem Statement

After having done the above mentioned research into coral reefs, their importance, how we can defend them, and how they are currently protected, we have come up with a method of supporting the current researchers by creating a new method of data gathering. We have designed a buoy based sensing system that is comprised of a diver, which is able to move up and down through the water, and a buoy, to where this diver is attached. This buoy would be able to carry any type of sensor that a particular researcher may desire, and measure a particular parameter at a self specified depth. The buoy would be able to send this data back to the researcher in real time, removing the need for any human intervention that could disturb the coral reef, such as human divers or boat engines.

Not only does this new design add to the existing methods of data gathering in coral reefs, solving one problem. But it also makes data gathering less manpower hungry. Because of these reasons, we believe that our design is able to solve the aforementioned problems.

USE Analysis

As the project is focused around the notion of USE (user, society, enterprise), it is of great importance to start by connecting to the future users of our product before finalizing the design. We have done this by interviewing marine biologists and researchers who are closely related to the topic of coral reefs. The interview page shows the questions asked, as well as a quick summary of the interviewee and the interview itself.

Users

As mentioned previously, our main users, and subsequently the first party stakeholders, are researchers focused on coral reefs, marine biologists and scientific divers. They are the foremost people who have the means and desires to stop the deterioration of coral reefs. Therefore, they are the people who will most likely be the ones using our design. Other stakeholders of our design include funders of our design, second party climate researchers, people living close to coral seasides and, in some sense, the government. None of these people will ever use our design. However, they will all benefit from our design being implemented. Funders, and subsequently the government (if they also fund the project), will make a profit of off the deployment of our design. Other climate researchers will benefit from the increase in accurate data. Finally, inhabitants of the seaside coral reefs will be able to keep their businesses alive, be they fishing or tourism.

Society

Enterprise

The design of the buoy

Design Process

Describe how, for each part of the design, how the designs changed over time, and why these changes where made.

The main focus of the design process was to design a diver that would be attached to a buoy which would be lowered through the water whilst carrying sensors to be able to monitor the water quality at different depths.

Anchor

describe the transition from anchor to reef hook to multiple reef hooks.

The original ideas for the buoy and diver included an anchor as it was found that anchors were the most suitable for deploying the buoys in the coral reefs such that they would not be swept away by tides and wind. Furthermore it was considered to be the easiest and most efficient way to deploy a buoy. But whilst doing further research and consulting with interviewees that could have been possible users, it was found out that for coral reefs, anchors were not as viable of an option due to how destructive the process on anchoring would be. Furthermore in many reefs anchors are also banned. Therefore with this new found knowledge, the original designs were further developed to be suited to being deployed in coral reefs. Alternatives were found to replace the anchor, with the most promising alternative being mentioned by one of the potential users, which was the use of a reef hook. The only issue for the designs was that one reef hook would not be sufficient to properly anchor the buoy as such multiple reef hooks were included in the designs.

Cables

from chains to cable.

Winch

State why this has basically not changed throughout the whole project + maybe say why only 1 winch was chosen.

Diver

Shape of the diver and what materials where initially planned, but where later changed to X.

Base

Shape, dimensions and weight changes that may have happened.

Initial Designs

Final Design Choice

Show the final design of the buoy and state what could be further improved on the design.

Mechanics of the Diver Movement

Describe in detail (more detailed than we have done in the design choices) how to diver will actually be able to move up and down through the water. Furthermore, talk about the limitations that the diver will have due to the chosen design (these limitations could also be a separate section for talking about the overall limitations).

Simulations

CAD stress test

Show CAD simulations, state why they are important to the design, and explain all images correctly.

Unity physics simulation

Talk about the physics simulation (showing may be difficult), explain the limitations set on the simulation, and describe what we wanted to get out of this simulation.

References