Aiming at Dealing with the stepped difference and gap of aircraft assembling

this paper comes up with an algorithm of the stepped difference and gap based on the structural light measuring theory from the size and position of them. This paper completes the measurement of the stepped difference and gap of the aircraft skins with the linear structural light vision sensor

and the pinpoint position of the measurement can be confirmed by using the indoor-GPS. As is confirmed by experiments

the result of the algorithm is quite stable: the repeat precision of the stepped difference within 5mm is not more than 0.04mm and the repeat precision of the gap is not more than 0.05mm.