| With the economic globalization, Chinese economy rises fleetly, and the amount of family car also increases gradually, correspond to the car stolen affairs are more and more. Nowadays theft-against technology already with safety, environmental protection, economize on energy has been listed as the four topics of automobile technology development. Following the intelligentized development direction of theft-against technology, the thesis puts forward making use of GSM and GPS technique, adopting DSP as a controller, and combiningμC/OS-Ⅱto realize the theft-against and position system. The system can realize all-weather detect and control theoretically, under the GSM.The thesis describes the main technologies of automobile theft-against and position system, including Global Positioning System(GPS) and its principle, and Global System for Mobile communication(GSM) and its short message business, and also analyzes position error and short message relay, it provides a basis for correcting the positioning information.The system is divided into two parts--vehicle terminal and customer's cellular phone. The vehicle terminal makes use of the modularization thought, mainly including DSP central processing module, GPS, GSM, power supply, detect and control module, and display module. The hardware platform carries out communication between customer and vehicle terminal, the vehicle's state is monitored by cellular phone's short message, and it can obtain a geography position information through GPS module.The software part introduces the communications protocol of GPS, the short message receive and send mode, AT command and the Embedded Real Time Operation systemμC/OS-Ⅱ. Then, introduces how to transplantμC/OS-Ⅱto TMS320LF2407A. At last, the application programs are completed, such as GPS data collection, GSM module data transmission and system detect program. WithμC/OS-Ⅱ, the system will be more real time and reliable, and the software design is easy to maintain and improve. |
PDF Full Text Request