Overview of Status of Analysis, Design, Fabrication, Tests, etc.
The calibration rig for the pressure sensor has been built and finding the optimal pull-up resistor is underway
Switching to the Nitrile Finger cots and waiting for the new sensor to understand the fit and attachment points
Raspberry pi has been very successful in maintaining bluetooth connection
Accomplishments from Previous Week
Created a remaining goals and to-be-purchase list to help the team remain on track Found here : https://docs.google.com/document/d/1ZoM7aVOixkhQMBKqSq9DE03HWwhfUrhSEqoPC495Yy0/edit?usp=sharing
A range of pull of resistors for the pressure sensor has been determined. Will purchase a 5MegaOhm potentiometer to gain a better idea on the most optimal resistor to give us the best resolution
NEW PCB board design created and after some input, it will be ordered
15mm Finger pressure sensor has arrived and provides ideal fit. Our sponsor will have the final say and will purchase the rest once given the green light
Back and forth communication with the raspberry pi has been very stable and will move forward to creating a live web interface
Goals for Next Week (list names after each item). Use specific and measurable objectives.
The IMU needs to be finished by the end of week 6 (Michael)
Calibration and the rest of the pressure sensor also needs to be close to completion. A raspberry pi code for the pressure sensor also needs implementation. (Euan)
The beginning of a Live web interface will be underway (Kyle)
Integration of sensors and boards into a case and into the finger cots will be figured out (John)
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
PCB design is good, but add some kind of haptic output (5/1 in person)
Haptic feedback through a coin vibration motor is currently being implemented
3D printed calibration scale is currently too sensitive and needs to be implemented in a way that the user would only need to press on it for a short time (5/1 in person)
Use either a strap or an adhesive for the hand IMU device
Try to figure out the battery life that this device will have
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Current PCB design (4 in x 2.5 in) is too bulky, especially if the electronics module will be located near the wrist (4/26 in person)
A redesign was done using a double sided design to constrain the PCB to the size of the ESP 32 which is 1 in x 2 in
Try looking into other fabrication methods for the scale (like using a laser cutter) (4/26 in person)
Keep in mind creating an operational sequence for using both the calibration scale and the device (4/26 in person)
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
N/A
Risks and Areas of Concern
IMU’s for wrist angle are taking awhile to figure out
Compact containers for board and sensors
Resources or Information Required but not Available
Help with Live web interface via Raspberry pi
Schedule
Proof of Concept is on week 5 Thursday.
Gantt chart has been updated to reflect delays on some sensors
Budget (list amount spent and amount remaining)
Budget remains the same as last week. No new purchases but will expect purchases next week.
Progress on Report and Webpage
Website has been updated with new pictures and information.
Final Report is being updated this week to included missing sections.