Capstone Design Document (pdf) - Capstone Experience

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