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dknathalage / SIT329-Project

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Decide on body positions to monitor and how detect each, (including which sensors needed) #19

Closed dknathalage closed 2 years ago

dknathalage commented 2 years ago

Detection Zones for Posture

As the initial attempt on detecting the posture, the team agreed on creating capacitive sensor prototypes. These capacitive sensors will be used to detect each body part of the cyclist. This discussion will focus on,

  1. Key positions the team is planing to detect
  2. The contact patches of the each position
  3. Sensor locations according to contact patches
dknathalage commented 2 years ago

Key Positions to Detect

The team has agreed on detecting a few key positions given. Please note that there are multiple variations of the same position and these positions will account for them. However, the plan is to detect a few key riding positions.

  1. Top Tube
  2. Pantani
  3. Backdown
  4. Froome
  5. Elbows
  6. Backup : Removed due to overlap in positions
  7. Back horizontal: Removed due to overlap in positions

Bike Positions

Reference: BEST CYCLING POSITION FOR GOING FAST |15 POSITIONS WITH PICS|

dknathalage commented 2 years ago

Cycling Postures and their contact patches

This table shows the contact patches the cyclist will touch when cycling in the above positions.

Positions HandleBar:Drops HandleBar:Hoods TopBar:Front TopBar:Rear Saddle:Top
Top Tube ✅ 🚫 ✅ ✅ 🚫
Pantani ✅ 🚫 🚫 🚫 ✅
Backdown ✅ 🚫 🚫 🚫 ✅
Froome ✅ 🚫 ✅ 🚫 ✅
Elbows 🚫 ✅ 🚫 🚫 ✅
dknathalage commented 2 years ago

Positions to mount the sensors

These positions have been identified as the main positions the cyclist will contact. It is suggested that the team mount the selected sensors below positions.

  1. HandleBar: Drops
  2. HandleBar: Hoods
  3. TopBar: Front
  4. TopBar: Rear
  5. Saddle: Top
  6. Saddle: Rear
dknathalage commented 2 years ago

Visual diagram for sensor locations

Image copy

dknathalage commented 2 years ago

Hi @redchillipadi, Can you provide a review of the content and close this issue?

redchillipadi commented 2 years ago

Good work, it looks really nice.

I think the seat is not used at all in the Froome position, so Saddle Front can be removed from the table for that position. I can't change it myself as I am not the owner.

I wonder if it is possible to remove the rear saddle sensor. It is only used for distinguishing between Pantani and Back Down, but I think the main difference is that in Pantani the cyclist is well away from the hoods, so the reading would just be for their hands, while in Back Down their body is right up against the hoods, so it should give a higher reading. This does turn the capacitive sensors into an analogue variable, with low, moderate and high capacitance sensed, which may not be the way we want to go.

We can probably keep it for now, and test it later on the bike. I am concerned it will get damaged with the user sliding in the seat, or pick up noise from the user sitting normally on the seat. Once we have the proof of concept set up we can test for noise in the system and durability

Our current bike only has a flat handlebar, so if we want to simulate drops we will need to 3d print a model for testing (or get real ones and fit them to the bike)

So if you don't mind to adjust the table, I think we can call this done for now, and revisit the rear seat sensor later.

dknathalage commented 2 years ago

Thanks, @redchillipadi, I included that location for redundancy and possible overlap with back down. I'm happy to go ahead with the changes you requested. We will revisit this once we are at testing.

redchillipadi commented 2 years ago

Thanks, that looks great. I will close the issue for now