4 ms·
I think there would be far too much noise. The accelerometer data is going to be different based on a number of factors: Orientation? Is the phone in your hand
by themanmaran 5y ago
I think there would be far too much noise. The accelerometer data is going to be different based on a number of factors:
Orientation? Is the phone in your hand? Your pocket? Your purse? Front seat / back seat?
By way of comparison I worked on some automatic breaklights that trigger when an accelerometer detects you slowing down (bikes, skateboards, scooters).
It turned out to be way more complicated that we expected. Hitting potholes, naturally slowing when you go uphill, taking a turn.
- V99 5y agoIt's an accelerometer and gyroscope. The acceleration is/can be reported relative to gravity, which always points down.
- robotresearcher 5y agoYou can't tell what component is due to gravity and what is not, without other information. This is the equivalence principle of general relativity, no less.
- deleted 5y ago[deleted]
- Nextgrid 5y agoI think the key is that the data would be in sync. You don't particularly have to care what the vibration is or which direction, the important bit is that these patterns line up with similar patterns collected from the other phone.
- genewitch 5y agoI've mentioned this before, but the Bosch 9-DOF sensors are accurate and have enough fidelity to track me walking through my house while sitting in the back room on a desk. That's the accelerometer. The gyros can detect music playing at the opposite end of the house assuming the speakers are big enough - phone playing YouTube, no, but sound bar, yes. Make no mistake that MEMs sensors are really very good. I was trying to wire something together to track what vehicles were travelling down my forest road and left the room with the data streaming, and came back to be impressed.