For the Science Center, our client is looking for interactive workstations that would demonstrate to the audience how the concepts from the ECpE curriculum at ISU can help solve real world challenges to assure a better and more sustainable future.
Any visitors to the Computer, Electrical, and Software Engineering departments. Perspective Students Alumni Company Representatives Outreach events
Piezoelectric Floor - To demonstrate that we can harness the mechanical energy from unconventional sources, such as people, in the form of electrical energy Sequential Programming - To demonstrate and create more understanding of the concept of programming
Focus: Energy Sustainability Approach: We will build an interactive floor that utilizes the concept of piezoelectricity to demonstrate to the audience that we can capture mechanical energy from our bodies to generate clean, renewable electrical energy.
Key Functional Requirements: The floor shall generate enough current to power a small LED bulb The floor shall support a weight of up to 250 lb The floor shall be raised from the room floor
Key Non-Functional Requirements: The floor shall be able to be moved to another room if needed The displays shall be visually appealing The floor module shall be quickly understandable and easy to use
Mechanical Stress Tile Displacement Piezo Generator Compression/ Decompression Electrical Power Display Operation User
Floor with Separate Visual Display Blocks with Built-In Audio- Visual Display
Floor with Separate Visual Display Pros Suitable for wider audience Supports different display options Cons Captures less energy Less interactive Display is disconnected from floor Blocks with Built-In Audio- Visual Display – Pros More interactive Captures more energy Compact system – Cons Not suitable for some audience segments Does not support other display options Potentially hazardous
Two Alternatives Spring System Advantage: Could be mounted firmly to subfloor Foam Blocks Advantage: Smooth Compression/ Decompression
Wooden Subfloor Divided into 9 blocks Center block will be covered and will not be compressible Each of 8 block surrounding blocks will be compressible and will house piezo generators, compression system, audio-visual displays, and accompanying circuits
Vendor: Noliac Inc. Ceramic Multilayer Generators (CMG) are built up with a number of thin ceramic layers sandwiched between internal electrodes, resulting in a low output voltage but high current compared to conventional single layer piezoelectric generators. Custom Product Worked with similar team in Denmark to successfully generate 0.13µA by applying hand pressure to 4 piezo generators. CMG size: 5mmx5mmx2mm, 60V.
Visual High Brightness Color LED Vendor: Kingbright USA 120°viewing angle Luminous Intensity: 1200-1450 Available in blue, green, and red Operating current: 120mA Audio One Central Speaker Powered separately Pre-Programmed Sound Modules Vendor: Zhen Xiang
Each of the 8 block will house one generator/ display system, which will require separate circuitry. Currently communicating with Noliacs R&D department to determine number, sizes, appropriate circuits, and estimated cost of piezo generators required for our application
Structural Analysis Test cell structure for ability to support maximum weight Functional/Performance Testing Test functionality and performance of all 8 piezo generators and audio-visual displays by placing weights on each cell
Key Functional Requirements: The Programming Module shall allow the user to order a set of commands The Programming Module shall give feedback on command order upon request The Programming Module shall allow the only administrator users to configure the volume used by the module
Key Non-Functional Requirements: The Programming Module shall be user friendly The Programming Module shall be quickly understandable and easy to use without a demo The Programming Module shall give the user a taste of programming
Main Frame Option Frame Description Frame Program Frame Password Frame
TestsExpected Outcome 1. Start program.1. Opens to Main Menu. a. No programs loaded. a. Let user know that no programs are available. b. A couple of programs loaded. b. Scrolling of programs not enabled. c. Many programs loaded. c. Scrolling of programs is enabled. 2. Options button is clicked.2. User is prompted for credentials. a. Credentials entered valid. a. Options Form is opened. b. Credentials entered incorrectly. b. User is informed and returned to Password dialog. c. Password dialog cancel button clicked. c. Password dialog closes. User brought back to Main Menu. 3. A Program is clicked.3. Proper Program Description box appears and Main Menu disappears.
TestsExpected Outcome 1. Main Menu button is clicked.1a. If any changes are made, user is prompted to save those changes. 1b. Return the user to the Main Menu. 2. Save button is clicked.2a. Save changes to the options XML file. 2b. Return the user to the main menu
TestsExpected Outcome 1. Main Menu button is clicked.1. A warning dialog will be displayed. a. Continue clicked. a. Program will close and Main Menu will appear. b. Cancel clicked. b. Dialog will be closed. 2. Item dragged from left list to right list.2. Item will appear in that instruction slot and will disappear from the left side. 3. Item dragged from right to left list.3. Item will return to original position and will disappear from the right list. 4. Run button clicked.4. Program will appear to highlight instructions one by one. If an error is found, User will be notified and execution will stop. Else, User will be notified of a successful execution. 5. Description button clicked.5. A warning dialog will be displayed. a. Continue clicked. a. Program will close and Main Menu will appear. b. Cancel clicked. b. Dialog will be closed.
ItemCost 9 Tiles (32 X 24 X 48)$117 (9*13) Subfloor and compression system$50 8 Piezo generators$480 (8*60) 4 LEDs (5.0X5.0MM RGB CLR SMD)$36 (4*9) 4 Sound Modules$20 (4*5) Total:$703
ItemCost 22 inch Monitor$300 Computer and accessories (keyboard & Mouse)$500 Wiimote$40 Wiimote Charger$40 Bluetooth Receiver$100 Table (Provided by the Department)$0 Security tethers$300 Total:$1,280