156B Week 3
Overview of Status of Analysis, Design, Fabrication, Tests, etc.
Bluetooth is the chosen form of data communication after a few field testings to our Sponsor’s workplace.
Several different materials have been purchased for glove testing
100% polyester has been bought
60/40% Cotton-polyester
90/10% polyester spandex
5”x3’ of each material
Calibration of the tactilus is being done using the flexiforce method of creating a linearized equation to determine unknown forces.
Accomplishments from Previous Week
Glove update: Two finger cot designs were made
One featured a corset design pattern using the 100% polyester
Another design utilized velcro using the 60/40% Cotton-Polyester material
Testing and initial setup of the Raspberry pi is underway. Some progress towards a stable connection has been achieved but nothing quite solid
Varying calibration weights have been purchased to use on the finger pressure sensors
Goals for Next Week (list names after each item). Use specific and measurable objectives.
Raspberry Pi to connect with bluetooth - Kyle
Narrow down glove material options - John
More Calibration of sensors and possibly another tactilus with smaller range - Euan
Focusing on quaternions to work for the IMU’s -Michael
Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
4/10
Focus on index finger, thumb and middle finger for pressure sensing
Sensor design will now only focus on those three fingers on each hand
Data recorded should be stored in a file for future reference
He believes that softness of flesh doesn't have a significant impact
Suggested to look into palm sensors
4/12
He agreed that Bluetooth is more reliable in his workplace
Gloves that will cover the device are nitrile gloves
Pinky and ring finger might not be as significant because skilled doctor would know how to properly grasp the instrument without needing it
Visual feedback (LED lights) is not preferred because it can distract and be ignored. Recommends using haptic feedback
Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)
Look into creating PCB for a cleaner and more secure wiring
Express PCB was the suggested website
Get in contact with Druann Greer-Cisneros
She is however too busy but will contact her for general advice
Comments from Other Students in the Class (indicate date of comments and if via email or in person)
None for now
Risks and Areas of Concern
Raspberry pi requires an extensive knowledge of Linux/Ubuntu in order to get the bluetooth to work on the ESP32
Resources or Information Required but not Available
N/A
Schedule
Proof of Concept Presentation is in two weeks
Budget (list amount spent and amount remaining)
Spent: $272.69
Remaining: $727
Recent Purchases:
Polyester Spandex - $1.39
100% Polyester - $0.68
60/40% Cotton Polyester - $1.26
Weight Calibration - $7.99
Progress on Report and Webpage
Senior Project Report is being updated with design alternatives, design specifications and primary final design discussion.
Webpage will slowly be updated with more team content and pictures from our adventure at Thornton Hospital