I really wonder what technology they use to track this. - Page 1
Forum section: electronics / general

author: TommyGunn
author_rank: Contributor
timestamp: April 02, 2014, 04:36:00 pm
content: http://youtu.be/QvHhm003KR0Anyone have any ideas how you could do this kind of tracking with any kind of accuracy?

author: Rigby
author_rank: Super Contributor
timestamp: April 02, 2014, 05:14:04 pm
content: would have to be radio, with a directional antenna, I'd think.

author: cyr
author_rank: Frequent Contributor
timestamp: April 02, 2014, 05:26:44 pm
content: GPS + MEMS IMU in the wearable unit, GPS + compass in the base unit?

author: BravoV
author_rank: Super Contributor
timestamp: April 02, 2014, 06:15:14 pm
content: If it uses and relies "only" from the GPS position from the transmitting unit, will it work indoor ?

author: Mr Smiley
author_rank: Frequent Contributor
timestamp: April 02, 2014, 07:01:38 pm
content: This guy doe's not have a camera operator, the camera follows the remote held in his hand.I know because I’ve watched all his videos and on some of them he checks the camera is tracking him by moving it left to right or such. And when it looses tracking he waits for a few seconds for it to catch up with him. When he wants to highlight something on the table or screen he holds the remote to what he wants to show.Classic Monitor Repair 01 of 03

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 02, 2014, 07:32:48 pm
content: I can't see GPS working for something like this, at least not alone, though could be differential GPS.The fact it only works at longer distances would perhaps support this, as a reasonably long distance would correspond to the minimum pan/tilt.Also, it doesn't appear to need the distance to be specified, which would be the case with an IMU to convert distance to angle.Looking at the manual :"Remote takes at least 8 mins for sensors to warm up and stabilise""Do not move the base after pairing"Also some of the other setup stuff suggests either a low-drift accel/gyro or DGPS, although 8 mins would seem a fairly long time for IMU stabilisation.Best guess is DGPS, maybe with some IMU support, though due to the distances involve I'm starting to doubt the latter would be useful.Looking some more at it, they do seem to be actively trying to not be clear on how it works - e.g. use of "pairing" for what is actually getting a GPS lock.I suppose if it's shown to be just two GPS receivers, someone will knock up something similar with an Arduino and a bunch of stuff from Adafruit & be all over HackadayDonations for teardown anyone?

author: Rigby
author_rank: Super Contributor
timestamp: April 02, 2014, 08:28:51 pm
content: The 8-minute thing definitely suggests DGPS at the camera end.My employer made use of some heavy, heavy math and have come up with a "sort of" real-time DGPS that we sell on some of our products. It doesn't have the accuracy of a fixed DGPS receiver, of course, but our receivers move and have, IIRC, about 3-inch precision horizontally, at the most, if you're within operational limits in terms of GPS reception. It goes sub-inch in optimal situations.After hearing how it worked I'm kind of shocked that no one came up with it sooner. We must have patented it, though, because no one has come up with it since, either.