Development of Dual Pendulum Based System for Two Wheeler Vehicle Safety

2-wheeler riders are at high risk of injury if they fall. This paper details the design, construction and initial testing of a cost-effective dual pendulum system to detect a sudden change in angle and alert the user via their mobile phone. Each pendulum contains a single AS5600 magnetic angle sensor. One pendulum is primarily sensitive to the longitudinal direction (front to back) whilst the other detects the lateral movement (side to side). Both sensors' angles are picked up by an Arduino Nano controller. This uses these values to classify the user into either Normal, Medium or Critical using the angle of tilt, duration and encoder RPM. The information is sent to the Android app created with MIT App Inventor through an HC-05 Bluetooth module. The app then uses this information to display the user readable data. The app is also set up to send a SMS alert including the phone's GPS location. Calibration of the encoder to the speed showed a linear relationship where RPM = 105.28v + 80.75 with R² = 0.9877. This prototype has been designed for demonstration purposes to students. Accuracy of detection, response time, false alarm rate and performance on the road has not been verified. Therefore, no claims can be made. This is not a certified safety device.