Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 6 | E-Bike Crash Detection and Safety |
Adam Arabik Ayman Reza Muhammad Daniyal Amir |
Shengkun Cui | design_document1.pdf final_paper1.pdf presentation1.pdf proposal1.pdf |
|
| # Title Team Members: - Ayman Reza (areza6) - Muhammad Amir (mamir6) - Adam Arabik (aarabik2) #Problem E-bikes are gaining popularity as a sustainable and convenient mode of transportation. The main issue with the growing number of e-bikes is the safety of the rider and those around them. If a rider gets into a crash, there is no automatic shutoff for the electrical systems on an e-bike. This means that the bike's motor can remain on, potentially causing more harm to the rider or the surrounding environment. Current safety systems installed on electronic devices typically focus only on post-crash communication, such as sending alerts to contacts or calling emergency services. There is currently no system that can detect a crash in real time and instantly cut power to the bike’s electrical systems to improve safety. #Solution My group's solution is a crash detection system with a motor shutoff that can integrate with e-bike systems. This device will use its own sensors and electrical measurements to recognize when a crash occurs. Once a crash is detected, the system will cut all power to the motor, ensuring that the bike can no longer accelerate even if the throttle is still engaged. To reduce false positives, the system will use a module that combines data from multiple sensors to provide a more accurate assessment of whether a cutoff is needed. In addition, the design will include a manual override that allows the rider to turn the motor back on and continue operating the bike normally. The goal of this project is to create a crash protection system that reacts quickly to its environment to prevent further harm during a crash. #Solution Components ##Subsystem 1: Crash Detection Sensors This subsystem is responsible for detecting sudden deceleration, impacts, or abnormal electrical behavior that indicates a crash. The design will use an accelerometer and gyroscope, like the MPU-6050, to monitor motion and angular velocity. A current sensor like the ACS712 will be used to detect sudden changes in motor current that occur during impact. An optional vibration or impact sensor may be added to confirm collision events and improve reliability. ##Subsystem 2: Control and Processing Unit This subsystem will process the inputs from the sensors, run the crash-detection algorithm, and issue the motor cutoff command. The system will be built around a microcontroller, such as an STM32 or ESP32, which has the processing capability to fuse sensor data and apply threshold-based decision making. The microcontroller will also handle input from the manual reset and override switch to allow the rider to re-enable the system if a false detection occurs. ##Subsystem 3: Motor Cutoff Circuit The subsystem physically disconnects the motor power when a crash is detected. A MOSFET-based switch will be used to cut power from the e-bike motor controller. The cutoff circuit will be designed to handle the motor’s current and respond within milliseconds. Once triggered, the motor will remain disabled until the system is reset by the rider. ##Subsystem5: Testing and Validation Setup The subsystem is focused on verifying the accuracy and timing of the system under controlled and real-world conditions. The initial bench testing will involve tapping the sensor and measuring how quickly the motor cutoff occurs using the oscilloscope. The controlled crash simulation will be performed by stopping the spinning wheel or using drop tests to mimic the impact. Field tests will involve riding the e-bike over curbs, bumps, and rough pavement to ensure the system doesn’t false trigger during normal use. Once a crash has been detected, the motor can be re enabled using the reset button. #Criterion for Success The rider must be able to manually cut and enable power to the motor at any time using switches on the electrical systems. If the bike tips over onto its side, the motor must turn off automatically. If the bike comes to an immediate stop that indicates a crash, the motor must turn off automatically. The system needs to be able to work with e-bike motors. |
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