1. Dual-Use Wideband Microphone System
“Welcome. I am Matthew Swanzy, the project manager for the Dual-Use Wideband microphone system, sponsored by NASA. I’d like to thank you for attending our senior Design day presentation. “
Sponsor: George Salazar, NASA
Faculty Advisor: Harold Stern
Project # 1.8

2. Fabrication and Testing
Team Members
Matthew Swanzy
Project Manager
Fabrication and Testing
Victor Brewer
Software
Jordan Fedorchak
Expandability
Jason de Jongh
Serial Communication
Hunter Thompson
Expandability
“First I’d like to introduce my team, again I am Matthew Swanzy responsible for our fabrication and testing, this is Jason De Jongh he will doing our Matlab and Arduino serial communication, Victor Brewer who will be working on our software, Jordan Fedorchak whom once we get a base unit operating, will be working on our expandability meaning our stretch goals, she’ll be working on that along with our last team member Hunter Thompson.”
Project # 1.8

3. Today’s Presentation Covers
Motivation
Description of Project
Roles & Responsibilities
Progress
Plans for 2nd semester
“For today’s presentation we’re going to first talk about some of the motivations behind our senior design project, then go over a description of our project we’ll discuss our individual roles and responsibilities, review our progress so far and lastly we will talk about our tasks for next semester.”
Project # 1.8

4. Motivation The problem:
Need: A multi functional device that can provide immediate alerts of potential hazards in order to quickly evaluate and resolve a situation before it escalates.
No Dual-Use MEMS microphone system currently exists, only a handheld ultrasonic source detector.
Why is this important?
Testing the viability of using a MEMS microphone on board to serve multiple functions for the crew(e.g. speech processing and ultrasonic frequency detection) that will provide quick alert to hazards, along with an open communication system between the crew.
“The motivation behind our senior design project is the need for a multifunctional device that can provide both quick alerts to potential hazards, due to ultrasonic frequencies being detected, and an open communication channel. There is currently no dual-use MEMS microphone system that performs these functions in fact the current ultrasonic detectors are all handheld devices. This project is important then because we can test the viability of using MEMS microphones to serve these multiple functions.”
Project # 1.8

5. Motivation
Why NASA is sponsoring this project?
They would like a dual use monitoring system that will be stationary and run in real time to provide quick alerts of potential hazards and an audio channel for the crew.
For deep space travel providing a system with lots of capability while reducing its power, weight and size is paramount.
“That is why NASA is sponsoring this project. They want to see if a stationary device that uses MEMS microphones can monitor in real time for ultrasonic sources as well as provide a continuous open audio channel. For deep space travel having a system with lots of capability, such as what we are designing for this project, that requires minimal power and is relatively small in weight and size is critical.”
Project # 1.8

6. Description of Project
Stretch Goals of Project
Goals of Project
POC detection of ultrasonic frequencies (20 – 80 kHz)
Distinguish between human voice ( Hz) and ultrasonic frequencies
Sonification of ultrasonic frequencies
Provide a communication channel
Beam forming array
Identify ultrasonic sources
Improved User Interface
“The main goals of our project are proof of concept for detection using MEMS microphones of ultrasonic frequencies also being able to distinguish between human voice, in the range of Hz, and ultrasonic frequencies, Sonification of ultrasonic frequencies, between 20 – 80 kHz, as well as provide a communication channel. Our stretch goals include a beam forming array, identification of specific ultrasonic sources, as well as creating an improved user interface.”
Project # 1.8

7. Roles and Responsibilities
Project Manager: Matthew Swanzy
Schedule team meetings
Communicate project progress with Dr. George Salazar from NASA, Dr. Harold Stern and Dr. Cecil Compeau
Monitor project’s success
Oversee all aspects of project to ensure all goals are accomplished and completed on time.
Fabricate our system
Test our system once complete
“My roles and responsibilities as the project manager include scheduling team meetings, communicating project progress with our sponsor, Dr. George Salazar at NASA, as well as our technical mentors Dr. stern and Dr. Compeau, also monitoring our project progress, which includes overseeing all aspects of the project to ensure we are completing all our goals meeting our deadlines. And I will also be fabricating our system as well as testing it once it is complete.”
Project # 1.8

8. Roles and Responsibilities
Team Member: Jason de Jongh
Research: Matlab and Arduino serial communication
Establish serial communication between Matlab and Arduino
Specs:
MEMS Microphone connected to Arduino to gather signals.
Arduino sends data to Matlab.
Filtering desired signals within Matlab.
Project # 1.8

9. Why this is a good Senior Design Project
The DWMS Project:
Involves multiple disciplines: software, mechanical, and electrical.
Promotes hardware and software experience
Integrates multiple components into a working system
You should be able to spout off WHY your project is a GREAT senior design project at any moment, anywhere. Too many students cannot answer this question and it is important to be able to do so.
Project # 1.8

10. Major Milestones Test Plan – 02/15/16
Characterization Report – 04/04/2016
Final Design Review – 04/11/ /20/2016
Final Report – 04/25/2016 &
Senior Design Day Presentation – 05/03/2016
Use the Master Schedule to fill in these dates.
Project # 1.8

11. Constraints
Economic: transducers that detect ultrasonic sound at a wider range and quality (above 80 kHz) are expensive whereas MEMS microphones are fairly inexpensive and easily available.
Technical: the location detection and beam forming to pin point the source of the safety hazard requires a more complex system and time to implement it. This would provide a more accurate alert and would be good for future expansion.
Consult your Functional Specification, and create a bulletized list of constraints. Time permitting, say how/why each constraint originates.
Project # 1.8

12. Roles and Responsibilities
Team Member: Victor Brewer
Research: Software
Order and monitor procurement of parts and tools
Design Matlab User Interface
Processing Audio Streams
Project # 1.8

13. Block Diagram
System level diagram of Dual-Use Wideband Microphone array. Blocks highlighted in yellow will be designed and coded for this project.
Project # 1.8

14. Project Elements Software Hardware Matlab Arduino MEMS microphone
Arduino Due
Alarm system
Arduino DUE
“The main elements of our design are…”
Project # 1.8

15. Project Deliverables Design and assemble the sensor unit
Research and develop a method to test the functionality
Compile information on the capabilities and limitations of the system
List the MAJOR deliverables only.
Project # 1.8

16. Roles and Responsibilities
Team Member: Jordan Fedorchak
Research: Expandability, MEMS Microphone Array
Form a uniform linear array
Optimize number and spacing of microphones
Matlab phased array toolkit
Project # 1.8

17. Challenges & Concerns Ultrasonic attenuation
High frequency signals lose intensity quickly due to high attenuation
Producing controlled ultrasonic sources
Most transducers have a fairly narrow bandwidth and high fall off rates
Word this carefully – OK to ask questions and seek resolution during the IDR.
Project # 1.8

18. Standards USB 2.0 UL-50 standards Created by USB Implementers Forum
USB 2.0 Specification released April 27th 2000
Max data transfer speed 60MBps
UL-50 standards
Standard for enclosures for electrical equipment
To ensure the device is safe to handle
EVERY project has AT LEAST ONE applicable standard – you must list it.
Project # 1.8

19. Roles and Responsibilities
Team Member: Hunter Thompson
Research: Expandability, Beamforming
Direction of arrival estimation
Code beamforming using Matlab
Project # 1.8

20. Project Progress Research completed for: Ultrasonic attenuation
Software tools (i.e. Matlab)
Hardware selection
Arduino Due Microcontroller
Knowles MEMS microphone
Analysis of system components completed for:
Sensitivity, signal to noise ratio, current consumption, operating voltage, serial communication
Go through this at a good pace. You could spend 30 minutes on this alone – don’t. Just give the overview.
Project # 1.8

21. 2nd Semester Tasks Tasks Planned for the Completion of the project:
Obtain hardware
Program Arduino and Matlab software
Assemble the device
Build Test apparatus
Test system capabilities
Don’t spend too much time on these! Remember – your main goal is to review the Functional Spec in detail.
Project # 1.8

22. Thank You
We would like to thank our sponsors, George Salazar, Andy Romero and David Juge at NASA
We would also like to thank our technical mentors Dr. Stern and Dr. Compeau
Thank you to everyone for attending our Senior Design I presentation!!!
Project # 1.8