4.2 
  
Verification of Production Cells 
Ref.: Volvo Car Corporation. 
To ensure high product quality from e.g. a car body 
production line, it is essential that the jigs and fixtures — 
the steering or indexing pins, holes, brackets and clamps 
are in their exact positions. Quality problems may arise 
from wear and tear, or by events such as a robotic 
collision which drastically alters the position of a bracket. 
MNS is ideally suited for this application. First of all it is 
easily transported to the production cell, and since the 
cameras can be freely positioned, it becomes quickly 
operational. The light pen is the essence of simplistic 
operation. By touching the cell reference points, MNS 
automatically creates the transformation matrix that allows 
it to measure in the Car coordinate system. If a CAD 
model of the cell exists, deviations from nominal values 
are instantly available. 
  
4.3 Measurement of Displacements and Deforma- 
tions Fig. 5 
  
Ref.: Centro Ricerche Fiat. 
  
  
  
MNS also serves as a nonobtrusive technique in measu- 
; ; : ring relative spatial displacements. This is useful for 
Fio. Off Line Quality Control quantifying deformations as a function of various applied 
forces. One application is the verification and calibration 
of Finite Element Method (FEM) computer models of 
  
  
Fig. 6 
unitize 
measi 
as the 
plicati 
  
Reuse 
the se 
displa 
  
  
  
Fig. 4. Geometric Verification of Fixtures and Clamps