Capstone Design Document (pdf) - Capstone Experience

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• Read temperature from pyrometero Acquire sensor output voltageo Used to ensure safe engine temperature• User interfaceo Output – Electronic display Voltage = 5V Amperage ≤ 50mA Pixels ≤ 128 X 64 Package size ≤ 2.75 X 1.25 X 0.5 (L X H X W) in inches Monochrome Graphical RS-232 communication Adjustable brightnesso Input – User controls Printed Circuit Board (PCB) Mountable Size ≤ .25 X .25 inches• Store initial settingso Storage ≤ 1Kb• Wiring harness connectiono MAP Sensor connectiono Fuel Pressure connectiono Pyrometer connectiono PCB connection• Self-contained and stand-alone unito Processor Power 16 or 32 bit processor Input/Output (I/O) lines > 10 lines Analog-to-Digital Converter (ADC) ≥ 1 ADC RS-232o Memory Flash ≥ 64Kb Random Access Memory (RAM) ≥ 5Kb• Handheld enclosure size and weighto Thickness ≤ 1.5 in.o Length and height ≤ 5 in.o Must be less than 2 lb.o Durability• Mountable – Striker Force moduleo On or around A pillar of vehicleo Good viewing angle – readable from mount• Wide temperature operationo Must be from at least -10°F to 135°FPage 3Capstone Design Document February 1, 2007
Striker Force will receive its power through the Engine Control Module, which will giveStriker Force 5 Volts. All information will have to be stored in memory for when the vehicle isswitched off. This is done to reduce power consumption and load on the battery of the vehicle.Striker Force will be a self-contained, stand alone unit that will be mounted in the cab of thevehicle. This unit will contain a processor, memory, and a user interface. The processor is thebrain of Striker Force and will control all the functions of the module. The processor will haveto be at least a 16 bit processor and have a minimum of 10 I/O lines. The processor will need tohave ADCs to facilitate communication with the various sensors. The final performancerequirement for the processor is RS-232. RS-232 is a standard that will allow for serialcommunications with the LCD.Technology Survey AssessmentNow that the functional requirements have been listed and the performance assessed, atechnology survey can be conducted to determine how each requirement will be met. Thissection addresses means of obtaining these functional requirements. Each requirement is listedand has three different technologies to meet those requirements. Along with each technology arepros and cons that help identify which technology is the best to meet the requirement. Thetechnology that best meets the requirement is then bolded.Power:• DC-DC Convertero Pros: Maintain 5V regulated signalo Cons: None• Voltage Regulatoro Pros: Maintain 3.3V regulated signalo Cons: Dropout Voltage• Batteryo Pros: Obtain 5V signalo Cons: Voltage spike, high amperageA DC-DC converter and voltage regulator were chosen to regulate power. The DC-DCconverter is used to regulate and maintain a 5V supply to the LCD. The voltage regulator waschosen to regulate and maintain a 3.3V supply to the microcontroller.Read MAP Sensor Outputs:• Input Captureo Pros: Up to 8 lineso Cons: None• Onboard ADCo Pros: High resolutiono Cons: NonePage 4Capstone Design Document February 1, 2007
Page 1: Capstone Design DocumentSponsor: Pa
Page 6: • Analog I/O Porto Pros: ADCo Con
Page 9 and 10: • Velcroo Pros: Universal, Inexpe
Page 11 and 12: DeliverablesThe deliverables for th
Page 13 and 14: • In Vehicle Test Plan (4/11/07)

Capstone Design Document (pdf) - Capstone Experience

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