Dual-Use Wideband Microphone System

SPONSOR: GEORGE SALAZAR, NASA

FACULTY ADVISOR: HAROLD STERN

Project # 1.8

Team Members

Matthew SwanzyProject ManagerFabrication and

Testing

Victor BrewerSoftware

Jordan Fedorchak

Expandability

Jason de Jongh Serial

Communication

Hunter Thompson

Expandability

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Today’s Presentation Covers

Motivation

Description of Project

Roles & Responsibilities

Progress

Plans for 2nd semester

Project # 1.8

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.

Project # 1.8

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.

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Description of Project

Goals of Project

POC detection of ultrasonic frequencies (20 – 80 kHz)

Distinguish between human voice (300-3400 Hz) and ultrasonic frequencies

Sonification of ultrasonic frequencies

Provide a communication channel

Stretch Goals of Project

Beam forming array

Identify ultrasonic sources

Improved User Interface

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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

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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.

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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

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Major Milestones

Test Plan – 02/15/16

Characterization Report – 04/04/2016

Final Design Review – 04/11/2016-04/20/2016

Final Report – 04/25/2016 &

Senior Design Day Presentation – 05/03/2016

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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.

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Roles and Responsibilities

Team Member: Victor Brewer Research: Software

Order and monitor procurement of parts and tools

Design Matlab User Interface

Processing Audio Streams

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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

Project Elements

Software Matlab

Arduino

Hardware MEMS microphone

Arduino Due

Alarm system

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Arduino DUE

Project Deliverables1. Design and assemble the sensor unit

2. Research and develop a method to test the functionality

3. Compile information on the capabilities and limitations of the system

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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

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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

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Standards

USB 2.0 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

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Roles and Responsibilities

Team Member: Hunter Thompson Research: Expandability, Beamforming

Direction of arrival estimation

Code beamforming using Matlab

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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

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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

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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