Nov 9th meeting

Meeting Goals

• Discuss upcoming deliverables
• Review Progress

Agenda

• We'll start off with progress for the last week, and talk about the prototypes
• Next, we'll discuss what needs to be done to make them work

Meeting Location

GJL Class room at 3:30 pm, November 9th

I. Reassessment of project goals. (Brain storm)

A. Finished product

B. Business model

C. Full Documentation

D. Manufacturing plans

E. Reliability: Design Failure Mode Analysis (DFMA)

F. Marketable product

G. Safe product

H. Provisional patent

I. Nice presentation

J. High level of satisfaction from team members

K. Asthetics

L. Process documentation on web site

M. Data showing device compliance with standards and metrics.

N. Passing on knowledge.

II. Team member reports

A. Shirt prototype - Chris, Colby, Bart.

1. Prototype was built for and tested on an adult. Elastic strap was sewed around the chest area. Change in inductance due to breathing was approximately one percent.

a. This small change in inductance was decidedly the result of using a wiring configuration that left a number of four inch spaces of elastic free of wiring. Therefore, the majority of the stretching took place in the unwired segments of the elastic band.

2. Solutions:

a. Use a different wiring method. (There must be wire loops in any place that stretching is expected.)

b. Locate area on abdomen where greatest movement occurs due to breathing. (most likely diaphram area.)

3. Ideas to consider:

a. Research sports bras that utilize heart rate monitoring and signal transmission.

b. Consider using a capacitive element in the shirt instead of inductive.

B. Oscillator Circuit - Jeff, Lloyd

1. It has been built.

2. Currently generating 2.1 Mhz signal

3. Maximum current is 11 milliamps

4. Changing inductance causes stability issues.

5. Goals:

a. Reduce maximum current to 2 milliamps

b. Maintain stability over changing inductance.

C. Co-operational meetings - Lloyd.

1. A patent meeting was attended on Monday. We are all considered inventors concerning this project. The ball is rolling on getting a provisional patent. The first step is finding out if the idea isn’t already taken. This is being done externally to the group.

 

2. 5 PM Monday Nov. 27^th, Lloyd and Colby will present the project to a business course and propose a cooperative project. Essentially have the business class help us market the device.

III. Action items for next week.

A. Shirt / Inductor task assignment.

1. Locating area of greatest movement on human chest. - Colby, Chris

 

2. Build new prototype using two small elastic strips to be placed on the sides of the shirt. - Colby

 

3. Talk to textile department about conductive material and who to go to for a professional integration of wire into our fabric for the final prototype. - Jen

 

4. Develop solid works strain model for our variable inductor. - Bart

B. Electronics assignments

1. Get the oscillator running at no more than 2 milliamps and ensure signal stability when subject to varied tank inductance. - Jeff

2. Order PieceOx controller and learn how to program it. - Lloyd