Design of super living wave range of intelligent obstacle
avoidance car based on single chip microcomputer
Abstract
This thesis is mainly based on single chip ultrasonic ranging intelligent obstacle avoidance
car research, its use in the process of traffic intelligent control vehicles driving distance, speed
and direction, to avoid the car collisions with obstacles.
The determination of the design of ultrasonic ranging system on condition that the ultrasonic
velocity in air, take on the side of launch ultrasonic wave and reflected wave time difference
computing distance, used to make judgments as a single chip microcomputer and a
corresponding instruction judgment signal source.Based on the study of the ultrasonic ranging
principle, this paper completed the design of the ultrasonic ranging system based on single chip
microcomputer, including single chip microcomputer minimum system, ultrasonic ranging
system and motor drive control circuit.
In the design of single chip microcomputer minimum system is to provide basic operation
service for the whole system, the ultrasonic ranging system under the control of the MCU,
transmit and receive ultrasonic, provide external interrupt signal source for SCM, so as to
provide basis for the MCU to judge, the drive system is the single chip microcomputer after the
judge to give its corresponding instruction code, to control the operation of the drive
system.Ultimately achieve the goal of intelligent obstacle avoidance.
Every module of the system can realize the expected function normally, and guarantee the
safety factor in the process of the car on the road, at the same time realize the ultrasonic
application in intelligent control vehicles is apart from the speed.Designed and implemented
after analyzing the smart car circuit structure is simple, convenient debugging, the design scheme
is correct and feasible, and the indicators is stable, reliable.
Key words: single chip microcomputer; Ultrasound; Range; Obstacle avoidance;
