4 ms·
They mention GPS is not accurate enough and thus different solution is needed. Could you do local differential-GPS solution? Put the ”base station” to charging
by jpalomaki 7y ago
They mention GPS is not accurate enough and thus different solution is needed.
Could you do local differential-GPS solution? Put the ”base station” to charging base (which likely remains static) and transmit the correction information over wifi or using some unlicensed frequency.
- karmicthreat 7y agoIt could work and that plus an IMU is what we were doing at my now recently defunct lawnmower startup. For us to have the precision we needed we had about a 3500$ setup to do so.
- jcims 7y agoDidn't all the jostling of driving over terrain mess with the IMU?
- karmicthreat 7y agoNot really, we were using an IMU with a magnetometer and it was reasonably stable when it was setup correctly. As well as calibrated well. That with the GPS made things stable enough that it was at least a very good demo.
- jcims 7y agoVery cool!
- nullc 7y agoYou really want a carrier-phase-tracking L1+L2 receiver on each end for that sort of usage which isn't inexpensive (yet). The beacons also could be adopted by future indoor projects of theirs... that would be really nice. My roomba gets lost easily when it starts getting dark out.
- musingsole 7y agoCombine with an outdoor surveillance system and use the cameras to track and correct the mower's position.
- karmicthreat 7y agoI had considered just some ir lights on the ground and on the mower. Then have a drone hover over the lawn and process the video for positioning.