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Day 31
Day 31
03/11/2018
The team went out to purchase newer material for testing. What the team got were:
- Velcro
- Foam
- Portable sewing machine
- Fishing wire
The Bill of Material will be updated accordingly
-Samuel
Day 32
Day 32
05/11/2018
The team created 4 more boards for extending the mpu 6050 modules, allowing sensors to be tested better. The parts purchased were tested for compatibility (such as the sewing machine and the foam).
There was a meeting with a mentor and there was a realisation that the project is too niche in tackling back problems and not on the consumers' viewpoint.
These are the meeting minutes points:
- Design is too focused on solving one solution. Should be focused on making the users want to use the product. If possible create it in a way that users would want the feature installed instead of being the final product.
- There is a need to understand how products change the culture of people, especially the habits and comfort of the users. Habits are difficult to change and if a product gives a negative feedback loop, the users are more likely to not wear the product.
- The pitch has to be focused on making the audience want to purchase the products. Give a product that solves what they want, and not just on the needs (that can make it feel like a hindrance).
- Business Model Canvas has to be tweaked towards a different genre or approach. Current business model canvas is too linear in its solving.
The team will still be focusing on doing the back braces, but will be opening the project pitch idea to a wider audience. The focus is more on having a wearable that can add features such as an automatic back brace and heat dispensing features. As of this update, the idea requires to be fleshed out more, thus greater details will be provided in future updates.
-Ethan
Day 33
Day 33
07/11/2018
The team discussed on the programming code and how it should function. This is the general concept at the end of the day:
- For sudden increase of the sensor's readings, the code understands it as "dynamic posture" and does not activate motors to correct posture. This prevents obstruction in work. However, the device alerts the user's phone on what duration they had bad posture
- For slow changes of the sensor's readings, the code understands it as "static posture" and activates the motor in intervals if needed. There will be a notification to tell users when they are having good or bad posture
- Sensors are based on gradient of readings, where the top and middle produces a gradient line and the bottom and middle produces another gradient line. If both gradient lines are considered under "bad posture", the device should activate accordingly to "dynamic posture" and "static posture"
- There will be different modes of reading for different purposes (e.g. squatting, sitting, standing, running). These modes will have different modes of values that deems "good posture" from "bad posture"
- IoT cloud allows users to keep track of the progress made
Design is still on the works. Fabrication will start when design has been settled
In addition, the business model canvas has been reworked to suit the features discussed on Day 32 and can be seen here: https://realtimeboard.com/app/board/o9J_kyoaepQ=/
-Samuel & Ethan
Day 34
Day 34
08/11/2018
The template has been conceptualized and laser cut out for more accurate parts using the foam. Motor holder parts and testing the strength of the motor has been done.
The team also did presentation slides to prepare for pitching the idea. Viewing of the presentation slides can be seen here: https://docs.google.com/presentation/d/13e7REdGzvuk22Qbwv6s2SW0OM37IcxDx7UkykytZ6Ho/edit?usp=sharing
-John
Day 35
Day 35
09/11/2018
The team went to check the parts and realized there are a few errors in the system. The sensors tend to be faulty and the motors have a coiling error that pushes the 3D printed part out. The video shows the coiling error produced by the motor. Future design are needed to calibrate the parts properly.
The team has discussions on the progress of the project and came with the conclusion that it was rushing other aspects that are not as urgent as the most important mechanisms. There will be a shift of the prototype to be more oriented around a minimal viable product.
-Ethan
Day 36
Day 36
12/11/2018
The team completed the motor electronics and mounted onto the base template. As a minimal viable product, the team just used duct tape. The motors and design works as intended, but there may be a need to change the design to suit the placement of electronics.
-John
Day 37
Day 37
13/11/2018
The team went to assemble the minimal viable product while testing the sensors' readings. The product does have a pulling effect that is not noticeable but still pulls the shoulders back effectively. There will be a need to hold down the parts to constrain them properly.
The team will be doing the 3D printed designs for better constrains.
-Samuel
WhatsApp Video 2018-11-12 at 11.48.12.mp4
Day 38
Day 38
14/11/2018
The team went out to outsource for someone to stitch the design neatly and find a leather shop that allows the progress to be neater. There will be a need to punch holes to make it straight and a fastener to make it better.
There has been a discussion on the purchase and payment for the stitch services. The main benefit of having someone to outsource is that it is cheaper and the person stitching the product can keep the stitching products.
The presentation for the Rocket Pitch Festival will not use the improved stitch product, but for the final presentation the product will be neater.
-Ethan
Day 39
Day 39
15/11/2018
The team went to 3D print parts to be attached to the prototype to see if the constrains work well with the mechanism. The parts are stitched down to constrain it to the prototype.
The 3D printed parts work well but there are some design flaws (too small, acting axis is not correct, breakable.) There will be a need to redesign the parts.
Tubes have been used to constrain the wires but there is a lot of friction and causes difficulty in pulling the parts with the motor. The team added lubrication inside the tubes for smoother insertion and pulling effect.
The test with the 3D printed parts work well and allows more consistent output. For the minimal viable product, the electronics allow forward and backwards movement. One motor is not strong enough, and there is a need to use two for one spool. The team will redesign the spool to allow 2 motors to use at the same time.
In addition, the motors used will be powered with a power bank for phones. There will be a boost converter to allow portability for the prototype to showcase the judges.
-Ethan, Samuel and John
Day 40
Day 40
16/11/2018
The team went to make some adjustments to the 3D printed parts and check if it fits. There are a bit of errors but it can be fixed by the next print.
The prototype (at the moment of writing) is able to function the features required for one side manually while being portable with the usage of a portable power bank.
The team went out to go shopping for the stitching supplies and brought back thicker strings, a hole puncher for leather (usable for neoprene), a thicker needle and some fasteners for the final product.
The current prototype is too small for the sensors and other parts, and the motors need to be lower down. Thus there is a need for more space for the final product, and a need to redesign the back portion.
-John
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