Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 36 | Bike Alert: Bike Lock with Real-Time Security Monitoring |
David Youmaran Diego Herrera Kenny Kim |
Aishee Mondal | design_document1.pdf final_paper1.pdf grading_sheet1.pdf photo1.jpeg photo2.jpeg presentation1.pdf proposal1.pdf video |
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| # Bike Alert: Bike Lock with Real-Time Security Monitoring ## Team Members - Diego Herrera (dherr4) - Kenneth Kim (kk67) - David Youmaran (dcy2) # Problem Bicycle theft remains a major issue, especially on campus. While traditional locks provide physical security, they fail to notify owners when tampering occurs, leaving bikes vulnerable. A security solution is needed—one that not only prevents unauthorized access but also alerts the owner in real time when theft attempts occur. # Solution The Bike Alert system is an advanced security attachment for standard bike locks, integrating multiple tamper-detection mechanisms with real-time notifications. The device will: - Detect lock disengagement and unauthorized tampering using various sensors. - Utilize an ESP32 microcontroller to process sensor data. - Communicate alerts via Wi-Fi to a mobile app, notifying the user in real time. - Feature a secondary locking mechanism (deadbolt) controlled by RFID for enhanced security. - Be battery-powered and rechargeable to ensure long-lasting operation. We acknowledge that previous attempts have been made to develop bike locking systems. However, most existing designs focus primarily on physical security without incorporating real-time alerts or secondary security measures. To our knowledge, no prior project has successfully implemented both mobile app notifications and an RFID-controlled deadbolt lock. Our design aims to bridge this gap by providing a comprehensive security solution that enhances both theft prevention and user awareness. # Solution Components ## Data Collection Subsystem (Tampering & Lock Disengagement Detection) This subsystem monitors the lock and detects unauthorized access. It consists of: - Hall-Effect Sensors for Lock and Case Monitoring - Lock Disengagement Detection: A Hall-effect sensor and magnet will detect when the lock is disengaged. If the magnet moves past a predefined threshold, an alert is triggered. - Case Tamper Detection: Inspired by [TI's application](https://www.ti.com/lit/ab/sboa514a/sboa514a.pdf), we will use a Hall-effect sensor positioned inside a 3D-printed enclosure to detect when the outer case is tampered with. A magnet embedded in the case ensures that when closed, the sensor detects a high flux density. If the case is opened/moved far enough, the decreasing flux density will trigger an alert. - Spring-Based Adjustable Vibration Sensor - Detects physical tampering such as cutting or shaking the lock. - The adjustability allows fine-tuning of sensitivity to differentiate between minor disturbances and actual theft attempts. - ESP32 Microcontroller - Collects data from all sensors and sends it to the Wi-Fi-connected mobile app. ## Communication & Mobile App Subsystem This subsystem enables real-time notifications and user interaction. - ESP32-to-App Communication - The ESP32 will transmit sensor data via Wi-Fi, using the campus network for connectivity. - If an alert is triggered (lock disengagement, tampering detected), the app will receive a real-time notification. - Mobile App Features - Display current lock status. - Send push notifications for tampering or disengagement events. - Event log to track past security incidents. - Allow the user to enable/disable monitoring modes manually (e.g., "In Use" vs. "Not In Use" mode). ## Secondary Security Subsystem (RFID Deadbolt Lock) To add an additional layer of security, the system will include an RFID-controlled deadbolt locking mechanism. - Purpose: Even if the main lock is broken, the deadbolt will prevent full disengagement of the bike lock. - How it Works: - The deadbolt is controlled via RFID authentication for convenient unlocking. - A small, high-torque motor will drive the deadbolt mechanism. - Requires a motor driver circuit and relay to switch power efficiently. ## Power Supply Subsystem The system must support continuous operation, including sensor monitoring, Wi-Fi communication, and motor operation. - Power Source: Rechargeable Lithium-Ion Battery. - Battery Capacity Considerations: - Must sustain ESP32 operation and Wi-Fi connectivity. - Should provide enough power for motor-driven deadbolt activation. - Efficient power management circuit to maximize battery life. # Criterion For Success - Reliable Detection – Sensors must accurately distinguish between normal activity and actual tampering. - Alerts – Wi-Fi-enabled notifications must reach the user in real time. - Secure Secondary Lock – The RFID-controlled deadbolt should prevent theft even if the primary lock is compromised. - Battery Life – The system must operate for at least 48 hours per charge under normal conditions. # Conclusion The Bike Alert system offers an approach to bicycle security by combining tamper detection, real-time notifications, and an RFID-based secondary lock. This project integrates multiple subsystems into a compact, user-friendly solution that enhances traditional bike locks without compromising convenience or being overly expensive. |
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