Road Surface Quality Monitoring using inertial sensors and GPS

Research and Design of an IoT System for Monitoring and Alerting Road Surface Quality via 4G Network====================================================================================================1. Data Format--------------- Data is stored in `.txt` files, with each line containing 14 values, separated by commas (`,`) and ending with a semicolon (`;`).- Structure: acc_x, acc_y, acc_z, gyr_x, gyr_y, gyr_z, mag_x, mag_y, mag_z, lat, lon, time, date, speed;2. Project Objective--------------------Analyze sensor data to:- Classify road surfaces: Dirt road \/ Cobblestone road \/ Asphalt road- Support the creation of a road quality map3. Directory Structure----------------------data_anh Kien\/\u251c\u2500\u2500 dirt_road\/\u251c\u2500\u2500 cobblestone_road\/\u2514\u2500\u2500 asphalt_road\/4. Hardware Devices-------------------- ESP32 WROOM 32U (16MB)- SIMCOM A7680C- GPS ATGM336H- GY-85 IMU- MicroSD Card- Data is recorded to microSD in `.txt` format5. Sampling Rate----------------- 100 Hz (100 samples per second)6. Units--------| Field        | Unit                     ||--------------|--------------------------|| acc_x\/y\/z    | g (acceleration)         || gyr_x\/y\/z    | rad\/s (angular velocity) || mag_x\/y\/z    | \u00b5T (microtesla)          || lat, lon     | degrees (GPS)            || time         | HH:MM:SS                 || date         | DD\/MM\/YYYY               || speed        | km\/h                     |7. Total Samples----------------| Road Surface Type | Number of Samples   ||-------------------|---------------------|| Dirt road         | 391,729             || Cobblestone road  | 059,017             || Asphalt road      | 691,504             || Total             | 1,142,250           |8. Total Files--------------| Road Surface Type | Number of Files     ||-------------------|---------------------|| Dirt road         | 16                  || Cobblestone road  | 20                  || Asphalt road      | 3                   || Total             | 39 files            |9. Data Collection Time------------------------- Dirt road:        0 hour 58 minutes- Cobblestone road:    0 hour 12 minutes- Asphalt road:        1 hour 54 minutes10. Distance Traveled During Collection---------------------------------------- Dirt road:        15.84 km- Cobblestone road:    3.1 km- Asphalt road:        24.677 km Data CSV: MU9250Frequency: 50 HzLocation: center car-1, 0, 1, 2: Stop, Asphalt road, Cobblestone road, Dirt road