One of five winners from Toyota's recent Ideas For Good competition, the smart helmet consists of a small circuit board, two accelerometers and three gyroscopes that measure the head's impact force, movement and tilt during a crash. The data is recorded to an SD card for retrieval and playback (say, during a lawsuit). According to one of the helmet's designers, "We can record what's going on with the head as its moving, and see how is it moving up to 400 times per second." Eventually, the team wants to incorporate wireless technology into the rig for hands free ambulance auto-dialing.
Take a look:
http://gizmodo.com/5810949/smart-bike-helmet-is-a-black-box-for-your-brain-case
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