Project
| # | Title | Team Members | TA | Documents | Sponsor |
|---|---|---|---|---|---|
| 61 | Keyless Smart Lock (Secured Illini) |
Andrew Ruiz Bowen Cui Sebastian Sovailescu |
Sanjana Pingali | proposal1.pdf |
|
| # Title Keyless Smart Lock (Secured Illini) # Team members Sebastian Sovailescu (ss159) Andrew Ruiz (ruiz25) Bowen Cui (tianyuc3) # Problem In the darkest hours of the night, when the moon barely shines, grimy Chambana thieves creep up on bikes and snatch whatever they can: wheels, seats, and most times the entire thing. Last semester, my bike was stolen right from in front of my apartment. My case is not isolated: according to data , hundreds of bikes are stolen every year in the CU area. For this reason, we want to design a smart bike lock that 1) deters thieves and 2) offers keyless capabilities. # Solution The proposed smart bike lock would include all the features of a conventional U-Lock (bolt cutter resistance, waterproof, etc.), but it would also come equipped with a 100+dB siren that is triggered by unwanted tampering. To provide keyless capabilities, the MCU would include a Bluetooth chip that allows the user to enable/disable the lock using an app. # Solution Components # # Subsystem 1 : Sensor Subsystem The accelerometer is used to detect tampering by recording unusual spikes in acceleration. Once an anomaly is detected, the alert system is triggered, which would activate the siren for a set amount of time. This would only occur when the FSM is in the armed state vs when in the unarmed state all sensors would be deactivated thus not leading to false alarms. Microcontroller - ESP32-S3-WROOM-1U will interpret the readings from the accelerometer/gyroscope and activate the sirens when the readings are out of range. Accelerometer - MPU6050 it has both accelerometer and gyroscope which would not only detect for sharp movement but also slower movement. Siren - PK-35N29WQ 12V 10mA relatively high power draw but in practice should not be active almost at all during typical usage can output 90dB # # Subsystem 2 keyless entry system: The purpose of this system is to allow for keyless entry using a bluetooth capable device (phone). It should also allow for logging of past access attempts.The MCU keeps track of an FSM of two states, armed versus unarmed. In the locked and armed state, the microcontroller will switch between the locked and unlocked states based on a message over bluetooth Components: Bluetooth device - mobile phone with app to control locking of the bike and access a log of past unlocks or tampers. Microcontroller - ESP32-S3-WROOM-1U - esp32 microcontroller to interface with the phone to control the locking and unlocking of the bike, and to log unlocks and tampers in conjunction with the accelerometer. # # Subsystem 3: Power supply system Our system is going to need 12V 3.7V and V rails so in order to achieve we will plan to use a 2 pack of Samsung 40T 21700 4000mAh 35A Battery and step up and down the voltages needed using asynchronous buck and boost converters to save on not needing as many signal amplifiers. Components: Battery - Samsung 21700 cells # Criterion For Success To achieve success for this project we will have a fully working locking mechanism with an app to access the locking mechanism as well as an alert system and BLE on the lock. We also will require the lock to have a siren to play to deter thieves. We also want to fully fledged out the app attached to our lock to see battery stats and to receive the alerts if it is being tampered with. If these core goals are completed we will then implement the app to include biking statistics such as movement, path traveled, etc as well as a GPS functionality on the lock to recover if lost. |
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