Obstacle Avoidance Robot Car

Abstract

Our robot’s goal is to auto navigating and obstacles avoidance and we can control it manually. For obstacles avoidance, there are many methods. Use infrared radiation sensor, but its weakness is not accuracy, cannot be used outside in the sun, narrow beam width, the infrared sensor reading will be different for different surfaces , different colors, and different shades even if the range is the same. Most of the time this reading is not too off, so the robot can still function. On the other hand, camera, it is complicated, long processing time and it is not flexible. To solve this problem, we use ultrasonic combines with servo motor. It is accurate, has wider beam width, no matter what color obstacles are and ultrasonic sensor can detect obstacles up to more than 4 meter far. To increase robot flexibility in detect obstacles, we mount ultrasonic with servo motor, so now the robot’s ultrasonic sensor can sweep from left to right, robot will not have to turn left or right for ultrasonic sensor in order to detect obstacles. About manual control for the robot, we choose Bluetooth technology instead of infrared radiation.