> On Thu, 19 Nov 2009, Michael Kugelmann wrote: >> Alex S. wrote: >> > http://blog.makezine.com/archive/2009/11/diy_real_time_kinematic_gps.html >> >> I would be interested not in a GPS that is very accurate but which is >> coupled with a gyro to be able to also work in tunnels like an >> underground line. >> Did anybody read something like that? I mean: having a small device for >> affordable price... >>
The RTK paper does mention use of a 'optional' IMU, so presumably the code base allows for this. There are really low cost accelerometers/gyros which could be used. Again, I believe that the antenna and RF front-end with be the major issue for a low cost solution. > My son did some formal work with this, with the accelerometers on and the > gps > off, and found that in about 250m he was more than 60km out. This is the problem with cheap IMU's, their accuracy/offsets pretty quickly drives the position off if they are not 're-synced' with GPS. Interestingly a work colleague was telling me about IMUs in running shoes, which can get 'zeroed' with every stride.... so if you are targeting the jogging market there is some hope. ;-) Simon _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
