Senior Design II paper
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Table of Contents2.0Executive Summary 3 3.0Project Description 3 3.1Motivation 4 3.2Significance 4 3.3Goals and Objectives 5 3.3.1High Efficiency and Low Cost 5 3.3.2A High Signal-to-Noise Ratio (SNR) 5 3.3.3Mobility 5 3.3.4User Friendly 6 3.3.5Comfortable and Lightweight Headset 6 3.4Requirements 6 3.4.1 Wireless Headphone Requirements 6 3.4.2 Infrared Emitter and Detector Requirements 7 3.4.3Triangulation 7 3.4.4Processors 7 3.4.5Graphical User Interface 8 3.5Relevant Technologies 8 3.5.1Remotes 8 4.0Hardware and Software Research 9 4.1Wireless Headphones 9 4.1.1 Types of Wireless Headphone Communication 9 4.1.2 Transmission Frequency for Headphones 11 4.1.3Wireless Headphone Transmission and Reception 12 4.1.4Modulation 12 4.1.5Antenna 14 4.2Television Audio Adaptor 17 4.2.1 Audio Connections 17 4.2.2 Analog to Digital (A/D) Conversion 17 4.2.3 Not using Analog to Digital (A/D) Conversion 19 4.2.4 Connecting the headphones to the television PCB 19 4.2.5Connection between the A/D boards to the Master Controller 19 4.3Headphone Tracking System 20 4.3.1 Triangulation 20 4.3.2IR Triangulation 20 4.3.3 Camera vision Triangulation 21 4.3.4 RF Triangulation 24 4.3.5 Transceivers 27 4.3.6 Sensors for Tracking 28 4.4Graphical User Interface 29 4.4.1 Application Types 29 4.4.2 Application Display 32 4.4.3 Tablet Specifications 32 4.4.4 Android Interface and Data Storage 34 4.4.5Bluetooth Connection 35 4.5Microprocessors 36 4.5.1 MSP430 36 4.5.2 Atmega Series 37 4.5.3 PIC micro-controller 37 4.5.4 Stellaris Cortex-M3 38 4.5.5Summary 38 4.6Printed Circuit Board 39 4.6.1Parts and Acquisition 39 4.6.2Vendor and Assembly 41 5.0Hardware and Software Design 44 5.1Wireless Headphones 44 5.1.1Parts and Acquisition 44 5.1.2Receiver Module 45 5.1.3Speakers 49 5.1.4Subsystem Placement on Headphones 50 5.2Television Audio Adaptor 51 5.2.1Infrared Receiver 52 5.3Headphone Tracking System 52 5.3.1Main Components and Design 52 5.4Headphone-to-Television Communication 58 5.4.1 IR Emitter and Detector Design 58 5.4.2 Parts and Acquisition of IR Emitter and Detector 60 5.4.3 Infrared LED Design 61 5.4.4Infrared Detector Design 64 5.5Audio Control and Switching Module 67 5.5.1 Multiplexers 67 5.5.2Radio Frequency Module 68 5.5.3Radio Frequency Antenna 69 5.5.4RCA inputs from Televisions 69 5.5.5Stellaris 8000 Series 69 6.0Software Design 71 6.1Headphone Tracking System 71 6.1.1Radio Frequency Collision Advance 71 6.1.2XBee Transceiver 73 6.1.3HP Module Software 75 6.2Headphone to Television Identification System 76 6.2.1Infrared LED Headphone Tag Programming 76 6.2.2Infrared Receiver Headphone Identification Program 77 6.3Android Tablet Application 78 6.3.1Acquiring the Java JDK, Eclipse IDE, Android SDK and the ADT Plugin 79 6.3.2Application Design 80 7.0Design Summary 92 8.0Project Testing 95 8.1Wireless headphone Communication 95 8.2Audio Control and Switching Module 96 8.3Headphone Tracking System 97 8.4Headphone to Television identification System 100 8.4.1 IR LED Testing 101 8.4.2 Infrared Detector Testing 101 8.5Android Application 102 8.5.1User Interfaces and Data Storage 102 9.0Administrative Content 104 9.1Milestone Discussion 104 9.1.1Senior Design I 105 9.1.2Senior Design II 106 9.2Budget and Finance Discussion 107 Appendices 108 Appendix A – Table of Tables 108 Appendix B – Table of Figures 108 Appendix C – References 108
One of the most prevailing mediums in culture today is the Sports Medium. For some people, it is a great past-time and for others, it dominates their lifestyles. We have sports for every season: American Football for Fall, Basketball and Hockey for Winter, Golf and Baseball for Spring, and much more. We also celebrate each sport’s postseason games (aka playoffs) that crown a sport’s team champion. Such sporting events began with actual attendance, then listening to radio broadcasts and finally watching the events on television. To accommodate the influx of so many teams (either professional or collegiate) playing on television, many sports are broadcasted on specialized sports’ channels which are available through two methods: owning a cable or satellite service to watch said games, or to go to Sports Bars. Sports Bars host many of the available and desired sports games by having many televisions displaying each game. The only disadvantage with this structure is that only one game’s audio is broadcasted to the patrons. Usually the audio is from a highly anticipated game; however, some patrons may be dissatisfied because they wanted to watch a Soccer game during an American Football game. The group has proposed a solution to this problem by having a wireless headphone network with television audio input for sports bar application. The headphones will autonomously change the television audio source depending on which television the user wants to watch. The group has also added extra features to the proposed solution. The idea is that each of the headphones in the network can be tracked by using Radio Frequency with a triangulation algorithm. The group projected this solution to the problem of having lost headphones, stolen headphones, and defective headphones. The user also requires the setup to be able to graphically show the tracking of the headphones, a way to keep track of which customer is using which headphone, and finally an easy to find user manual. The group decided that having a mobile application will be able to satisfy the costumer’s needs in having a graphical user interface were they can easily check and modify the products properties. The application will graphically show the mobility of the headphones in the owner’s facility. It will also allow for headphone users to check in, which will allow an organization scheme to occur. This scheme will help the owner to know which customer is using which headphone, hence allowing them the possibility to track the user in case of faulty headphones, or even theft. The application will also provide good documentation of the product, which will give the owner a better user experience.
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