meum 
  
  
  
Tests of Chest-Level Safety Belt 
Photogrammetric measurements 
Stereocamera Wild b=40cm 
Stroboscope Philips 
Frequency=275 flashes/sec 
Speed 
  
  
p: T T T T I > time 
0,05 0,1 sec 
T T T 
/\ Deceleration 
1404 m/sec 
1004 
8 04 
604 
404 
204 
  
T T T T I T T T T I time 
0,05 0,1 sec 
Stretching of the belt 
mm 
    
704 
604 
507 
404 
304 
204 
  
T T T T T T T T T zT —» Lime 
ce 0,05 0,1 sec 
Original length 653 mm 
Fig. 2. Results of an experiment. Top: The change of the speed during about 
0,08 sec. Center: The deceleration as derived from the top figure. Bottom: The 
stretching of the belt.