Based on the design of vehicle-mounted pavement flatness measuring device of LC Liangshan Pi

1. Objective:

Familiar with the development process of embedded projects, master how to design a smart car hardware circuit, software programming and system debugging capabilities. Measurement of pavement flatness is realized.

2. Function introduction

• Realize the functions of four-wheel drive intelligent car walking and differential turning;
• Realize the function of trolley driving speed adjustment;
• The ultrasonic module is used to realize the functions of ranging and avoiding obstacles;
• The GPS module is used to realize the function of real-time positioning of the car;
• Use the MPU6050 module to measure the road conditions;
• The Bluetooth module is used to realize the function of transmitting GPS data and traffic data back to the host computer.

3. Skill mastery

Hardware design capabilities

• Learn the ability to analyze the circuit of embedded projects and learn how to understand the schematic;
• Initially learn to master the basic ability of component selection and data sheet reading;
• Learn the working principle of intelligent car and the basic method of embedded circuit design;
• Learn the ability of schematic design and PCB design, and cultivate independent project design thinking;
• Master the skills of component welding and hardware debugging, and become a new generation of "Welding Emperor".

Software development capabilities

• Understand the basic functions and use of peripherals of GD32, and get started with GD32 project development;
• Understand the principle of PWM and realize PWM control of output with different duty cycles;
• Understand the principle of serial communication and Bluetooth data transmission, and realize the control function of mobile phone;
• Master the collection method of MPU6050 attitude angle data;
• Master the collection and control methods of ultrasonic sensor data;
• Master the methods and skills of embedded software development, code reading and bug debugging.

4. Project data analysis

The data were exported and analyzed, the abnormal data were screened out, and this place was marked as a suspected road surface damage according to the longitude and latitude data.