无线控制小车的毕业设计.doc

摘要 随着无线传输技术、计算机技术和自动控制技术的迅速发展，远程控制的应用越来越广，无线通信成为一种优势。本系统采用了无线收发芯片NRF24L01,单片机STC12C5A60S，单片机STC89C52，小车控制芯片L298N为核心进行设计，通过程序控制无线发射模块发射信息，并使用LCD1602显示发射的信息。当无线接收模块接收到有效信息后，蜂鸣器响应表示接受到信息，然后通过程序控制小车执行相应的命令，从而控制小车按照人的意向行走。 本设计运用直流电机调速技术、PWM调速技术完成对小车运动方向和运动速度的控制，使小车能够稳速正确的行走。硬件电路由无线发射模块、无线接收模块、小车控制模块电机驱动模块及电源模块等构成。本系统基于一些完备而可行的硬件设计，使用了切实可用的软件算法，实现了远程控制小车行驶的目的。 本文是对设计实物的说明，首先介绍了设计的任务，然后设计整个方案的设计原理图，分析硬件的方案的选择，最后设计硬件电路图和编写程序，做出的实物后，经过实验验证，本设计完全实现本设计所要求的任务。 关键词：无线；PWM调速；远程控制小车；直流电机调速 Abstract Along?with?the?wireless?transmission?technology,?computer?technology?and?automatic?control?of?the?rapid?development?of?technology,?remote?control?used?more?and?more?widely,?and?wireless?communications?become?an?advantage.?The?system?USES?the?wireless?transceiver?chip?NRF24L01,?microcontroller?STC12C5A60S,?microcontroller?STC89C52,?the?car?control?chip?L298N?as?the?core?design,?through?the?program?control?module?launch?wireless?transmitting?information,?and?use?that?information?LCD1602?launch.?When?the?wireless?receiving?modules?to?receive?the?effective?information,?response?to?accept?the?buzzer?to?information,?and?then?through?the?program?control?car?executes?orders,?so?as?to?control?the?car?according?to?the?intent?of?the?people?walk. This design using dc motor speed control technology, PWM control technology to complete car movement direction and movement speed control, make the car to steady speed right to walk. Hardware circuit by wireless transmitting module, wireless receiving module, the small car control module motor driver module and power supply module, etc. This system based on some mature and feasible hardware design, the practical use of the available software algorithm, and realize the remote control the purpose of driving the car. This paper is to design forms of that first introduced the design of the task, and then the whole scheme design of the design principle diagram, analysis of the hardware options, and in the end the design hardware circuit diagram and program, ma