Sentra

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Inspiration

We, as a team, are extremely passionate about solving pending real-world issues that have serious impacts on people. Crowded areas often cause serious injuries, sometimes resulting in death. So we built Sentra. Sentra

What it does

Sentra uses the accelerometer, gyroscope, and orientation sensors in every smartphone to detect crowd dynamics as they form. One phone won't tell you much, but when many phones in the same spot start moving together in a similar rhythm, a pressure wave is forming through the crowd, a major warning before disaster strikes. Sentra captures it and alerts everyone in the area while there is still time to open an exit or to stop letting people from getting in.

How we built it

We built a web API that accesses the phone's hardware sensors to collect real-time movement data. We made the backend using FastAPI and an SQLite database, while the frontend was built through JS to handle the phone's local sensors. The frontend was done using HTML and CSS.