DualUse Wideband Microphone System SPONSOR GEORGE SALAZAR NASA

Dual-Use Wideband Microphone System SPONSOR: GEORGE SALAZAR, NASA FACULTY ADVISOR: HAROLD STERN Project # 1. 8

Team Members Matthew Swanzy Project Manager Fabrication and Testing Victor Brewer Software Project # 1. 8 Jordan Fedorchak Expandability Jason de Jongh Serial Communication Hunter Thompson Expandability

Today’s Presentation Covers Ø Motivation Ø Description of Project Ø Roles & Responsibilities Ø Progress Ø Plans for 2 nd semester Project # 1. 8

Motivation The problem: Ø 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. Ø No Dual-Use MEMS microphone system currently exists, only a handheld ultrasonic source detector. Why is this important? Ø 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? Ø 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. Ø For deep space travel providing a system with lots of capability while reducing its power, weight and size is paramount. Project # 1. 8

Description of Project Stretch Goals of Project Ø POC detection of ultrasonic frequencies (20 – 80 k. Hz) Ø Distinguish between human voice (300 -3400 Hz) and ultrasonic frequencies Ø Sonification of ultrasonic frequencies Ø Provide a communication channel Project # 1. 8 Ø Beam forming array Ø Identify ultrasonic sources Ø Improved User Interface

Roles and Responsibilities Ø Project Manager: Matthew Swanzy Ø Schedule team meetings Ø Communicate project progress with Dr. George Salazar from NASA, Dr. Harold Stern and Dr. Cecil Compeau Ø Monitor project’s success Ø Oversee all aspects of project to ensure all goals are accomplished and completed on time. Ø Fabricate our system Ø Test our system once complete Project # 1. 8

Roles and Responsibilities Ø Team Member: Jason de Jongh Ø Research: Matlab and Arduino serial communication Ø Establish serial communication between Matlab and Arduino Ø Specs: Ø MEMS Microphone connected to Arduino to gather signals. Ø Arduino sends data to Matlab. Ø Filtering desired signals within Matlab. Project # 1. 8

Why this is a good Senior Design Project The DWMS Project: Ø Involves multiple disciplines: software, mechanical, and electrical. Ø Promotes hardware and software experience Ø Integrates multiple components into a working system Project # 1. 8

Major Milestones Ø Test Plan – 02/15/16 Ø Characterization Report – 04/04/2016 Ø Final Design Review – 04/11/2016 -04/20/2016 Ø Final Report – 04/25/2016 & Ø Senior Design Day Presentation – 05/03/2016 Project # 1. 8

Constraints Economic: transducers that detect ultrasonic sound at a wider range and quality (above 80 k. Hz) 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. Project # 1. 8

Roles and Responsibilities Ø Team Member: Victor Brewer Ø Research: Software Ø Order and monitor procurement of parts and tools Ø Design Matlab User Interface Ø Processing Audio Streams Project # 1. 8

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 Project # 1. 8 Arduino DUE

Project Deliverables 1. 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 Project # 1. 8

Roles and Responsibilities Ø Team Member: Jordan Fedorchak Ø Research: Expandability, MEMS Microphone Array Ø Form a uniform linear array Ø Optimize number and spacing of microphones Ø Matlab phased array toolkit Project # 1. 8

Challenges & Concerns Ø Ultrasonic attenuation Ø Ø High frequency signals lose intensity quickly due to high attenuation Producing controlled ultrasonic sources Ø Most transducers have a fairly narrow bandwidth and high fall off rates Project # 1. 8

Standards USB 2. 0 Created by USB Implementers Forum USB 2. 0 Specification released April 27 th 2000 Max data transfer speed 60 MBps UL-50 standards Standard for enclosures for electrical equipment To ensure the device is safe to handle Project # 1. 8

Roles and Responsibilities Ø Team Member: Hunter Thompson Ø Research: Expandability, Beamforming Ø Direction of arrival estimation Ø Code beamforming using Matlab Project # 1. 8

Project Progress Ø Research completed for: Ø Ultrasonic attenuation Ø Software tools (i. e. Matlab) Ø Hardware selection Ø Ø Arduino Due Microcontroller Ø Knowles MEMS microphone Analysis of system components completed for: Ø Sensitivity, signal to noise ratio, current consumption, operating voltage, serial communication Project # 1. 8

nd 2 Semester Tasks Planned for the Completion of the project: Ø Obtain hardware Ø Program Arduino and Matlab software Ø Assemble the device Ø Build Test apparatus Ø Test system capabilities Project # 1. 8

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