3 ms·
Ask HN: Think GPS like system but local
Hey, actually i need to measure distance several points which will have barriers between them like human body and cloths etc...
I was thinking about infrared sensor but they can't pass through the body.
GPS does work to find distance between two points.
But can i setup a local gps in a room so it gives me accuracy in millimetres instead of meters like with ordinary GPS? If so, how? Can you suggest anything better?
Distance between two points is limited to 8 feet max.
- thepapanoob 8y agoit really shows that you didnt even think about it once :D look at how gps works (its really simple) then look at some passive systems and some active ones you will see why noone made an elegant solution yet
- iamdumbman 8y agoCan't believe there isn't already a system which is capable of offering error within 1 millimetre.
- coldtea 8y agoCan't believe? Because triangulation with signals from orbit passing through the atmosphere is trivial?
- iamdumbman 8y agoI am not taking about GPS. I need GPS like system with satellite confined in a room capable of resolution within 1mm error.
- choot 8y agoI think there are several systems like LIDAR with less a millisecond error.
- ablerman 8y agoDifferential GPS will get you 10cm accuracy. Getting into the mm range is a whole other thing. https://en.wikipedia.org/wiki/Differential_GPS https://en.wikipedia.org/wiki/Differential_GPS
- choot 8y agoWow, there aren't sensors which already are capable of measuring distance between two points with error less than 1mm. (With barriers in between) I am kinda shocked at the state of affair.