Large area measurement
Large area measurement
(OP)
Have got a room size vacuum system with inside parts that need accurate alignment relative to one another
Height wise too
Is there a large laser or similar system that will resolve about 10 thou in 3D
The aero people must have this down pat with their big structures
Thanks





RE: Large area measurement
http://www.gom.com/En/Applications/Digitizing/qual...
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Large area measurement
The site below is for a manufacture of these systems. Although it is probably more than you need, they maybe could help you or suggest a company in your area that could be contracted.
http://www.attinc.com/basics.htm
http://www.attinc.com/index.htm
RE: Large area measurement
http://web547.gsfc.nasa.gov/amb/Metrology_/kern2/k...
We have used it for airframe geometry measurements and it is very accurate, like 0.02mm
RE: Large area measurement
The system works by tracking a "target ball" that has a set of mirrors in it to reflect the laser back to the unit. The target ball also has fixtures that can be used to track surfaces, edges and holes.
It has a frequency pulse sweep through the laser that it uses to measure distance.
You can track in real time if you have a theoretical model. We've actually located complicated parts using this system.
There is a range to it due to the light dispersal. We've always oriented the laser unit fairly close to the aircraft. We were able to acheive a tolerance as tight as 5 ten thousandths.
However, you will need a direct line of site for this system. The theodolite machine cannot be moved during a shoot. The machine is very sensitive.
Someone walking close to the machine or dropping a tool near the machine will throw it off due to the floor vibration (even through concrete floors).