Project

# Title Team Members TA Documents Sponsor
56 Adaptive Baby Monitoring System
 Luis Ramirez
Michael Qiu
Yueyang Lin
 Jacob Bryan design_document0.pdf
design_document0.pdf
final_paper0.pdf
presentation0.pptx
proposal0.pdf
Our project is a system that detects crying noises and then responds to the situation by playing some soothing sounds or lullabies. This is useful when the parents are not in the same room as the baby and want to monitor the baby and be able to manually control the playback device through a mobile app.

Components:

1) Cry Detector: Recording device that sends notification to user whenever a crying sound is detected. This will be done using pattern recognition template matching on the sound waveform. We will accomplish this through a digital signal processor by using the math library and DSP library. Also, upon detection of a crying sound, the parents will get a notification on their phones, and this is accomplished through Bluetooth.
2) Music Playback Device: When the baby starts to cry and a cry is detected, a signal will be sent to a playback device, which will then play music to calm the baby down. The storage for the media will be an SD card, and we will have a microcontroller to receive information, such as what song to play, from a mobile app through bluetooth. We will be designing the circuitry of the speakers ourselves. Additionally, the parents will be able to control this device through a mobile application. This will be done through bluetooth, as the playback device and mobile app will communicate with each other. The DSP will also interface with the playback device through bluetooth by sending the results of the classification algorithm. We will also have volume indicators and an on/off indicator on the device through LED’s. This will have a power routing system built from a PCB that powers the LED’s, the Bluetooth module, and the speakers simultaneously.

Electronic Automatic Transmission for Bicycle

Tianqi Liu, Ruijie Qi, Xingkai Zhou

Featured Project

Tianqi Liu(tliu51)

Ruijie Qi(rqi2)

Xingkai Zhou(xzhou40)

Sometimes bikers might not which gear is the optimal one to select. Bicycle changes gears by pulling or releasing a steel cable mechanically. We could potentially automate gear changing by hooking up a servo motor to the gear cable. We could calculate the optimal gear under current condition by using several sensors: two hall effect sensors, one sensing cadence from the paddle and the other one sensing the overall speed from the wheel, we could also use pressure sensors on the paddle to determine how hard the biker is paddling. With these sensors, it would be sufficient enough for use detect different terrains since the biker tend to go slower and pedal slower for uphill or go faster and pedal faster for downhill. With all these information from the sensors, we could definitely find out the optimal gear electronically. We plan to take care of the shifting of rear derailleur, if we have more time we may consider modifying the front as well.

Besides shifting automatically, we plan to add a manual mode to our project as well. With manual mode activated, the rider could override the automatic system and select the gear on its own.

We found out another group did electronic bicycle shifting in Spring 2016, but they didn't have a automatic function and didn't have the sensor set-up like ours. Commercially, both SRAM and SHIMANO have electronic shifting products, but these products integrate the servo motor inside the derailleurs, and they have a price tag over $1000. Only professionals or rich enthusiasts can have a hand on them. As our system could potentially serve as an add-on device to all bicycles with gears, it would be much cheaper.

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