HelpMate's UI interface includes, webcam stream with all the sensor value on a QVGA, on the shed of helmate. It's features include a whatsapp ping on exceeding speed or a message when someone need help or any sort of emergency message.
For sensor part, Basic Heterogeneous Application Interface (BHAI) is being used which is a cape for Beaglebone black with addition features. It is designed in our lab CEDT NSIT (www.cedtnsit.in).
It's sensor database is managed by mysql and overlaying of sensor values on video is done by opencv image processing. For low demand of bandwidth a jpg stream is acheived with the help of ajax in jquery. Also for graphical representation of sensor value in real-time D3.js library is being used here.
History, video and other technical difficulties while pursuing this project is discussed at my blog http://mrityunjai.in/helpmate-a-smart-helmate-prototype/