THE POSTURE PEDOMETER CUMMERBUND

October 2012 Program Review

Team Members:Kelly HanKyle Mauer (Team Lead)Kevin Vo

Advisors:Dr. Aziz Inan (Faculty)Srija Pidaparthy (Industry)Dr. Deborah Munro (Client)Dr. Andrew Nuxoll (Instructor)

What does the Cummerbund do? Will indicate if user has bad back

posture. Will display the user’s step count.

BUT HOW, KEVIN?

The design utilizes two inputs, two outputs, and a “brain”.

Flex Sensor

Pedometer Switch

Arduino Uno

Vibration Motors

Arduino LCD

Deadlines and Progress

Major Milestone Finish Functional Specification v1.0

Deadline: Oct. 5 Completed: Oct. 4

Progress Met with Srija Pidaparthy (Oct. 2) Received Arduino Uno from Dr. Hoffbeck (Oct. 7) Ordered Parts (Oct. 14) Researched Lilypad Arduino Components Pedometer Predicament

What’s a Lilypad?

Lilypad Arduino is a line of components made specifically for interfacing electronics with fabric.

Pedometer Predicament

We encountered issues with interfacing a ball and mercury tilt switch for the pedometer function. Ball switch needed 30° tilt to register a

contact. Mercury switch needed 5° tilt to register a

contact.

Our Solution…

Our first idea was to replace the tilt switch with an Arduino GPS Shield that would record the distance the user walked.

Problems Problems: The GPS would not be able to determine if the user is walking or driving. Shield is too bulky.

Final Decision

Our team decided to utilize a pedometer spring switch contact.

This mechanism is powered by a 1.5v coin battery Output is ~1.5 volts when contact is open Output is 0 volts when contact is closed

Future Milestones

(Minor) Finish first draft of Design Document Deadline: Nov. 2 Estimated finish date: Nov. 1

(Minor) Finish Design document v.95 Deadline: Nov. 9 Estimated finish date: Nov. 8

(Major) Interface Flex Sensor Deadline: Nov. 14 Estimated finish date: Nov. 14

Future Milestones cont.

(Major) Complete Design Document Deadline: Nov. 16 Estimated finish date: Nov. 15

(Minor) Final Budget Calculated Deadline: Nov. 16 Estimated finish date: Nov. 15

(Major) Implement Pedometer with Arduino Deadline: Nov. 30 Estimated finish date: Nov. 30

Team Concerns

Make sure the flex sensor contours with the back. We want to make sure that the sensor

detects a change in back posture effectively.

Interfacing inputs and outputs with Arduino We still have not had much experience with

Arduino hardware and software

Plans for Progress

To make sure we complete our milestones we will start early on documents, testing, and continue to research Arduino hardware and software.

Our Plan Interface Flex Sensor with Arduino Interface Pedometer with Arduino Determine Cummerbund Fabric

References

http://arduino.cc/en/Main/ArduinoBoardUno

http://www.arduino.cc/en/Main/ArduinoBoardLilyPad

https://www.sparkfun.com/products/11285

https://www.sparkfun.com/products/8606