Design And Implementation Of Smartcar Based On CMOS Image Sensor

Automotive electronic technology is considered in the development process of a revolution, the extent of automotive electronics was seen as a measure of the level of modern car important symbols and improve the performance of the car the most important technology measures. On the current China, the development of intelligent vehicle is not very fast, especially in the security, intelligence, and interaction between cars and road information.Intelligent Vehicle is outdoor mobile robot wheeled traffic in the area of important applications; it has fundamentally changed the traditional vehicle control mode, which can greatly enhance the efficiency of transport systems and security. Below, respectively, from the application.and technical aspects of the development trends of the future prospects. From the application point of view, the Smartcar has been able to be in the line of laboratory exercise, and have better speed and accuracy, but the current line also relatively simple, does not take into account actual road in the complex environment affected, but the subject of further study for the future and lay a solid foundation.This Smartcar control system to MCU MC9S12DG128 as the core components, using CMOS image sensor traffic information collection, identification and can be guided linear path recognition. Video brightness adaptive threshold adjustment, effective image segmentation and unique hardware comparator ensure that the Smartcar identification sensor signal path of accurate, stable and fast. Speed feedback module made its lightweight and compact mechanical properties, electrical properties and concise corresponding ring queue algorithm, and precision to achieve rapid speed detection and does not increase any mechanical moving parts and mechanical load. DC motor drive module using MC33886 stability, strong. System control strategy adopted PID control based on switching control programmed, and strive to achieve system stability and rapid operation on the best balance between in the shape of different driving conditions, according to Smartcar basically on the optimal control parameters, reflect a good dynamic and static characteristics Choose low dropout power management chip TPS7350 and filtering, noise elimination programmers can at 7.2V battery power for the system under the conditions of the various functional modules provide a stable and reliable power supply work for the stability of intelligent vehicles provided powerful guarantee.