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.