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Remote control car solution
In the field of toy cars, the emergence of smart cars has made children and car model lovers more popular. With the advancement of technology and the advent of the intelligent age, intelligent products are ubiquitous in life. Various intelligent devices play different roles in their respective fields. Smart cars are not only cheap, but can even perform tasks that are difficult for humans to perform. It has played an important role in many fields such as industry, agriculture, and social production and life. The wireless remote control car can work in dangerous environments, search personnel, and play a special role in various fields.
1. The overall structure of the remote control car project
The smart remote control car of this project has smart tracking, smart obstacle avoidance, smart recognition of traffic lights, and wireless control of the car through the Bluetooth function on the Android phone. This design uses 8-bit single-chip microcomputer as the control core, with 8K in-system programmable Flash memory. In this project, we first make it the smallest system, including crystal oscillator circuit, reset circuit and power supply.
In the field of toy cars, the emergence of smart cars has made children and car model lovers more popular. With the advancement of technology and the advent of the intelligent age, intelligent products are ubiquitous in life. Various intelligent devices play different roles in their respective fields. Smart cars are not only cheap, but can even perform tasks that are difficult for humans to perform. It has played an important role in many fields such as industry, agriculture, and social production and life. The wireless remote control car can work in dangerous environments, search personnel, and play a special role in various fields.
2. Design of each module of the remote control smart car
2.1 Tracking module
In this design, the infrared tube is used to track the road in realizing the car's identification of the road. Infrared tube tracking is the use of infrared rays that have different reflections on different physical surfaces. When the car is driving on the white paper with black lines, the car is constantly sending and receiving infrared rays during the whole process of driving. When the infrared light is emitted and meets the white ground, diffuse reflection occurs, and the reflected light is received by the receiving tube. As a result, the entire receiving tube is turned on and outputs a low level; when encountering a black line, because the emitted infrared light is absorbed, the receiving tube cannot receive the signal and outputs a high level, and the microcontroller can do it according to the corresponding signal change. Judgment and processing.
In this design, we can use 3 sets of infrared tubes to sense the ground signal, which can realize tracking, find the exact position line to stop, and adjust the traveling direction of the car according to the tracking.
2.2 Obstacle avoidance module
When the car is moving, infrared sensors can be used to detect obstacles. The working principle of the circuit is to install an infrared transmitter on both sides of the car to send infrared signals. The infrared receiver is received by a special infrared receiving module installed in the center of the front of the car, and the principle of judging roadblocks in the car's forward route; a. The infrared emitting diode on the left emits a signal, detects the receiving end in the center, and judges whether there is a signal received; b. The infrared emitting diode on the right emits a signal, detects the receiving end in the center, and judges whether there is a signal received, c. If there is a signal reception when the left side transmits, it can be determined that there is an obstacle on the left side of the car; if there is a signal reception when the right side is transmitted, it can be determined that there is an obstacle on the right side of the car; There is an obstacle directly in front of the car.
2.3 Traffic light recognition module
The traffic light system we designed is to simulate the crossroads in real life to control the direction of vehicle circulation, and simulate the meaning of red, green and yellow signals in traffic rules. Through one traffic light, the signal body contains 3 sets of traffic lights, which are used to control the car to move forward, turn left, and turn right. Moreover, the use of digital tubes for counting seconds is closer to the simulation of modern traffic lights. This design aims to realize the identification of the traffic light signal by the car and make a judgment, and control the state of the car through the state of the traffic light signal. In order to realize this function, we can use a single-chip microcomputer to alternately control 3 groups of traffic light signals. When the green light is on in the forward direction, the red lights are on in the left-turn and right-turn directions; the green lights are on in the left-turn direction, and the red lights are on in other directions; The green light is on in the direction of turning, and the red light is on in other directions; at the same time, the digital tube displays the countdown. Thus, the whole process realizes the control of the traffic light signal to the car.
2.4 Bluetooth module
Android is a completely open standard platform, a free and open source operating system based on Linux, mainly used in mobile devices. And the Android system has significant advantages, first of all, its openness, the platform it develops allows any mobile terminal manufacturer to join the Andriod alliance; secondly, it is not bound by the operator, and it can connect to the network more conveniently The developer provides a very wide and free environment, which will not be hindered by various rules and regulations, and therefore, it absorbs various types of excellent software and hardware. In this design, we realize the communication and control with the car through Bluetooth on the smartphone-based Andriod platform. The Bluetooth module is mainly divided into a host and a slave. The host can pair and communicate with the slave, but the slave cannot communicate with the slave or between the host and the host. The slave can communicate with the Bluetooth of the computer, mobile phone, etc. When we realize the control of the smart car, this module mainly realizes receiving the instructions sent from the mobile phone, so what we need is the slave module. We choose the HC-06 module for this design. The HC-06 module only remembers the last paired slave, and only pairs with this slave until the KEY high level is triggered to give up the memory.
Summarize
In recent years, the research and development of smart home is in full swing. A group of well-known foreign companies, led by Microsoft and Motorola, have successively entered the research and development of smart home. As an emerging intelligent product, smart home has obvious advantages in the home market, and the market prospect can be described as broad. The solution of the mobile phone to the intelligent remote control car in this design is just a typical example. The control module of this system can be extended to control all home appliances, so as to realize the intelligence and automation of the home.
The above are the details of the smart remote control car solution introduced by Shenzhen Zuichuang Microelectronics Co., Ltd. If you have electronic function development needs for remote control cars, you can trust us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad: Songhan, Yingguang, Jieli, Ankai, Quanzhi, realtek, with MCU, voice IC, Bluetooth IC and module, wifi module. Our development capabilities cover PCB design, single-chip microcomputer development, Bluetooth technology development, software customization development, APP customization development, WeChat official account development and other hardware and software design. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS earphones, the development of Bluetooth earphone speakers, the development of children's toys, and the development of electronic education products.
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