Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Resistive opto-isolator wikipedia , lookup
Portable appliance testing wikipedia , lookup
Surface-mount technology wikipedia , lookup
Printed circuit board wikipedia , lookup
Automatic test equipment wikipedia , lookup
Geophysical MASINT wikipedia , lookup
Wearable Wireless Physiological Sensors Daniel Bishop Josh Handley Phillip Hay Christina Hernandez Rosy Logioia Gouri Shintri Clay Smith Adam Stevenson Goals and Objectives • • • • • Measure blood volume pulse Measure skin resistance Measure temperature Record measurements on wearable device unit Transmit measurements wirelessly to a computer • Display measurements on Graphical User Interface in real time Recent Issues BVP Sensor – Correctly amplifying and filtering signals GSR – Reverse engineering safely Convert bulky circuit into small and wearable device Understanding Eagle Size and availability of parts Compatible design to Dr.Liu’s requirements Getting Chipcon to process information Debugging hardware Sensors Team - Goals Objectives – Done Objectives – To Do • Reverse engineer BVP sensor •Properly filter BVP signal with 2nd order low pass filter • Reverse engineer temperature sensor • Calibrate and test temperature sensor •Reverse engineer GSR sensor • Condense circuits into wearable item • Integrate sensors and board • Test / Debug integration • Integrate sensors / board with software • Test / Debug complete configuration • Present final product Temperature – Circuit Temperature – Calibration Voltage to Temp Conversion y = 47.985x + 76.513 R2 = 0.9229 140 Temperature (F) 120 100 80 60 40 20 0 0 0.2 0.4 0.6 V2-V1 (V) 0.8 1 Temperature – Testing Thermometer Positions Temperature ◦F Measured Voltage V Calculate Voltage V % Error Gouri’s palm 91.6 .314 .314 0 Zach’s palm 97.2 .442 .431 2.55 Di’s palm 96.4 .403 .414 2.66 Di’s fingers 94.9 95.9 .340 .360 .383 .404 11.22 10.89 Pulse Oximetry – Circuits LED Circuit Photovoltaic Circuit Skin Resistance •Waiting on extra samples to arrive •Reverse engineer sample to learn how GSR sensors work •Build a working prototype on breadboard using knowledge and information from sample •Calibrate sensor •Proposed skin resistance circuit Board Design Team - Goals Objectives – Done Objectives – To Do • Comprehension of Chipcon 2400 and Microcontroller • Test schematic • Board Schematic (Eagle) • Research Parts – Size and $$ • Send off schematic for board creation • Integrate sensors and board • Test / Debug integration • Integrate sensors / board with software • Test / Debug complete configuration • Present final product Board Design Microcontroller and Chipcon 2400 • Microcontroller • 32 I/O Pins • 8 analog inputs pins (100 ksps) • Max amplification = 16, variable • UART (Built-In) • Chipcon CC2400 • 4 pin SPI bus • 6 optional digital interfaces • 3 pin antenna connection • 2.4 GHz transceiver Custom Circuit Board PCB Layout Software Team - Goals Objectives – Done Objectives – To Do • Comprehension of Chipcon 2400 and Microcontroller • Transmission software •Analog input software •Receiving Software •USB software •GUI • Integrate software with sensors / board configuration •Test / Debug complete configuration • Present final product Analog Input Code Initialize timer Poll sensors continuously Convert to digital signals Testing Signal generator Communication Code Initialize Chipcon registers/clock Construct/Transmit packets Testing Writing/Reading chipcon registers Set up multiple Chipcon EBs Questions?