基于Android系统控制的多功能小车系统设计

Design of Embedded Multifunctional Car System Based on Android

为了解决目前小车系统功能较单一,集成度不高,数据处理能力不强,缺乏远程数据传输、存储和控制等缺点,设计了一种具有自动循迹、自动避障、平板电脑控制、码盘测速、无线图像传输处理等多功能的小车系统。该系统采用STC公司的IAP15F2K61S2单片机作为核心,用红外传感器实现小车循迹,超声波测距实现自动避障;四个步进电机作为小车驱动,采用UL2003、L298芯片驱动步进电机工作,利用左右电机的速度差实现转向;采用PWM(脉冲宽度调制)技术实现对小车的调速;采用云台摄像头T6836WIP采集图像并处理;利用Wi Fi转串口模块作为无线数据接收发送,控制小车的工作方式;上位机控制采用谷歌第二代NEXUS 7平板,在平板电脑上安装使用Android系统开发的应用软件,用于给小车发送工作命令,接收小车发送回来的图像、数据,进行处理和存储,方便用户直观了解前方的信息。小车工作正常,性能稳定,可以用于实际生活中仓库管理、物品查找等,实现安全管理。

In order to solve the shortcomings of smart cars, such as single function, low integration degree, poor data processing ability, lack of remote data transmission, storage and control, etc. , embedded multifunction car system with automatic tracking, automatic obstacle avoidance, phone control, ＂wireless image transmission and processing functions is designed. The system can be controlled by STC＇s IAP15F2K61S2 SCM, tracked by photoe- lectric sensors and automatically avoided obstacle with ultrasonic module. The car can be droved by four stepper motors which are droved by UL2003, L298 chip, and shift in the direction is achieved through the left and right poor motor speed. PWM technology can be used to control the speed of the car. PTZ camera T6836WIP is used for image acquisition and processing, and the car can be controlled by wireless mode by WiFi to serial module. PC control is using Google＇ s second - generation NEXUS 7 tablet which installs monitoring software developed by An- droid system. The NEXUS 7 can send order to the car and receive image from the car, then process data and stor- age, which provide the user intuitive understanding of information ahead. The car with stable performance is work- ing properly, and then can be used in real life for warehouse management, items search etc. , which help people to achieve security management.